1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/base/nsDisplayList.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,5347 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + * vim: set ts=2 sw=2 et tw=78:
1.6 + * This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/.
1.9 + */
1.10 +
1.11 +/*
1.12 + * structures that represent things to be painted (ordered in z-order),
1.13 + * used during painting and hit testing
1.14 + */
1.15 +
1.16 +#include "mozilla/dom/TabChild.h"
1.17 +#include "mozilla/layers/PLayerTransaction.h"
1.18 +
1.19 +#include "nsDisplayList.h"
1.20 +
1.21 +#include "nsCSSRendering.h"
1.22 +#include "nsRenderingContext.h"
1.23 +#include "nsISelectionController.h"
1.24 +#include "nsIPresShell.h"
1.25 +#include "nsRegion.h"
1.26 +#include "nsStyleStructInlines.h"
1.27 +#include "nsStyleTransformMatrix.h"
1.28 +#include "gfxMatrix.h"
1.29 +#include "nsSVGIntegrationUtils.h"
1.30 +#include "nsLayoutUtils.h"
1.31 +#include "nsIScrollableFrame.h"
1.32 +#include "nsIFrameInlines.h"
1.33 +#include "nsThemeConstants.h"
1.34 +#include "LayerTreeInvalidation.h"
1.35 +
1.36 +#include "imgIContainer.h"
1.37 +#include "BasicLayers.h"
1.38 +#include "nsBoxFrame.h"
1.39 +#include "nsViewportFrame.h"
1.40 +#include "nsSubDocumentFrame.h"
1.41 +#include "nsSVGEffects.h"
1.42 +#include "nsSVGElement.h"
1.43 +#include "nsSVGClipPathFrame.h"
1.44 +#include "GeckoProfiler.h"
1.45 +#include "nsAnimationManager.h"
1.46 +#include "nsTransitionManager.h"
1.47 +#include "nsViewManager.h"
1.48 +#include "ImageLayers.h"
1.49 +#include "ImageContainer.h"
1.50 +#include "nsCanvasFrame.h"
1.51 +#include "StickyScrollContainer.h"
1.52 +#include "mozilla/EventStates.h"
1.53 +#include "mozilla/LookAndFeel.h"
1.54 +#include "mozilla/Preferences.h"
1.55 +#include "ActiveLayerTracker.h"
1.56 +#include "nsContentUtils.h"
1.57 +#include "nsPrintfCString.h"
1.58 +#include "UnitTransforms.h"
1.59 +
1.60 +#include <stdint.h>
1.61 +#include <algorithm>
1.62 +
1.63 +using namespace mozilla;
1.64 +using namespace mozilla::css;
1.65 +using namespace mozilla::layers;
1.66 +using namespace mozilla::dom;
1.67 +typedef FrameMetrics::ViewID ViewID;
1.68 +
1.69 +static inline nsIFrame*
1.70 +GetTransformRootFrame(nsIFrame* aFrame)
1.71 +{
1.72 + return nsLayoutUtils::GetTransformRootFrame(aFrame);
1.73 +}
1.74 +
1.75 +static void AddTransformFunctions(nsCSSValueList* aList,
1.76 + nsStyleContext* aContext,
1.77 + nsPresContext* aPresContext,
1.78 + nsRect& aBounds,
1.79 + float aAppUnitsPerPixel,
1.80 + InfallibleTArray<TransformFunction>& aFunctions)
1.81 +{
1.82 + if (aList->mValue.GetUnit() == eCSSUnit_None) {
1.83 + return;
1.84 + }
1.85 +
1.86 + for (const nsCSSValueList* curr = aList; curr; curr = curr->mNext) {
1.87 + const nsCSSValue& currElem = curr->mValue;
1.88 + NS_ASSERTION(currElem.GetUnit() == eCSSUnit_Function,
1.89 + "Stream should consist solely of functions!");
1.90 + nsCSSValue::Array* array = currElem.GetArrayValue();
1.91 + bool canStoreInRuleTree = true;
1.92 + switch (nsStyleTransformMatrix::TransformFunctionOf(array)) {
1.93 + case eCSSKeyword_rotatex:
1.94 + {
1.95 + double theta = array->Item(1).GetAngleValueInRadians();
1.96 + aFunctions.AppendElement(RotationX(theta));
1.97 + break;
1.98 + }
1.99 + case eCSSKeyword_rotatey:
1.100 + {
1.101 + double theta = array->Item(1).GetAngleValueInRadians();
1.102 + aFunctions.AppendElement(RotationY(theta));
1.103 + break;
1.104 + }
1.105 + case eCSSKeyword_rotatez:
1.106 + {
1.107 + double theta = array->Item(1).GetAngleValueInRadians();
1.108 + aFunctions.AppendElement(RotationZ(theta));
1.109 + break;
1.110 + }
1.111 + case eCSSKeyword_rotate:
1.112 + {
1.113 + double theta = array->Item(1).GetAngleValueInRadians();
1.114 + aFunctions.AppendElement(Rotation(theta));
1.115 + break;
1.116 + }
1.117 + case eCSSKeyword_rotate3d:
1.118 + {
1.119 + double x = array->Item(1).GetFloatValue();
1.120 + double y = array->Item(2).GetFloatValue();
1.121 + double z = array->Item(3).GetFloatValue();
1.122 + double theta = array->Item(4).GetAngleValueInRadians();
1.123 + aFunctions.AppendElement(Rotation3D(x, y, z, theta));
1.124 + break;
1.125 + }
1.126 + case eCSSKeyword_scalex:
1.127 + {
1.128 + double x = array->Item(1).GetFloatValue();
1.129 + aFunctions.AppendElement(Scale(x, 1, 1));
1.130 + break;
1.131 + }
1.132 + case eCSSKeyword_scaley:
1.133 + {
1.134 + double y = array->Item(1).GetFloatValue();
1.135 + aFunctions.AppendElement(Scale(1, y, 1));
1.136 + break;
1.137 + }
1.138 + case eCSSKeyword_scalez:
1.139 + {
1.140 + double z = array->Item(1).GetFloatValue();
1.141 + aFunctions.AppendElement(Scale(1, 1, z));
1.142 + break;
1.143 + }
1.144 + case eCSSKeyword_scale:
1.145 + {
1.146 + double x = array->Item(1).GetFloatValue();
1.147 + // scale(x) is shorthand for scale(x, x);
1.148 + double y = array->Count() == 2 ? x : array->Item(2).GetFloatValue();
1.149 + aFunctions.AppendElement(Scale(x, y, 1));
1.150 + break;
1.151 + }
1.152 + case eCSSKeyword_scale3d:
1.153 + {
1.154 + double x = array->Item(1).GetFloatValue();
1.155 + double y = array->Item(2).GetFloatValue();
1.156 + double z = array->Item(3).GetFloatValue();
1.157 + aFunctions.AppendElement(Scale(x, y, z));
1.158 + break;
1.159 + }
1.160 + case eCSSKeyword_translatex:
1.161 + {
1.162 + double x = nsStyleTransformMatrix::ProcessTranslatePart(
1.163 + array->Item(1), aContext, aPresContext, canStoreInRuleTree,
1.164 + aBounds.Width(), aAppUnitsPerPixel);
1.165 + aFunctions.AppendElement(Translation(x, 0, 0));
1.166 + break;
1.167 + }
1.168 + case eCSSKeyword_translatey:
1.169 + {
1.170 + double y = nsStyleTransformMatrix::ProcessTranslatePart(
1.171 + array->Item(1), aContext, aPresContext, canStoreInRuleTree,
1.172 + aBounds.Height(), aAppUnitsPerPixel);
1.173 + aFunctions.AppendElement(Translation(0, y, 0));
1.174 + break;
1.175 + }
1.176 + case eCSSKeyword_translatez:
1.177 + {
1.178 + double z = nsStyleTransformMatrix::ProcessTranslatePart(
1.179 + array->Item(1), aContext, aPresContext, canStoreInRuleTree,
1.180 + 0, aAppUnitsPerPixel);
1.181 + aFunctions.AppendElement(Translation(0, 0, z));
1.182 + break;
1.183 + }
1.184 + case eCSSKeyword_translate:
1.185 + {
1.186 + double x = nsStyleTransformMatrix::ProcessTranslatePart(
1.187 + array->Item(1), aContext, aPresContext, canStoreInRuleTree,
1.188 + aBounds.Width(), aAppUnitsPerPixel);
1.189 + // translate(x) is shorthand for translate(x, 0)
1.190 + double y = 0;
1.191 + if (array->Count() == 3) {
1.192 + y = nsStyleTransformMatrix::ProcessTranslatePart(
1.193 + array->Item(2), aContext, aPresContext, canStoreInRuleTree,
1.194 + aBounds.Height(), aAppUnitsPerPixel);
1.195 + }
1.196 + aFunctions.AppendElement(Translation(x, y, 0));
1.197 + break;
1.198 + }
1.199 + case eCSSKeyword_translate3d:
1.200 + {
1.201 + double x = nsStyleTransformMatrix::ProcessTranslatePart(
1.202 + array->Item(1), aContext, aPresContext, canStoreInRuleTree,
1.203 + aBounds.Width(), aAppUnitsPerPixel);
1.204 + double y = nsStyleTransformMatrix::ProcessTranslatePart(
1.205 + array->Item(2), aContext, aPresContext, canStoreInRuleTree,
1.206 + aBounds.Height(), aAppUnitsPerPixel);
1.207 + double z = nsStyleTransformMatrix::ProcessTranslatePart(
1.208 + array->Item(3), aContext, aPresContext, canStoreInRuleTree,
1.209 + 0, aAppUnitsPerPixel);
1.210 +
1.211 + aFunctions.AppendElement(Translation(x, y, z));
1.212 + break;
1.213 + }
1.214 + case eCSSKeyword_skewx:
1.215 + {
1.216 + double x = array->Item(1).GetAngleValueInRadians();
1.217 + aFunctions.AppendElement(SkewX(x));
1.218 + break;
1.219 + }
1.220 + case eCSSKeyword_skewy:
1.221 + {
1.222 + double y = array->Item(1).GetAngleValueInRadians();
1.223 + aFunctions.AppendElement(SkewY(y));
1.224 + break;
1.225 + }
1.226 + case eCSSKeyword_skew:
1.227 + {
1.228 + double x = array->Item(1).GetAngleValueInRadians();
1.229 + // skew(x) is shorthand for skew(x, 0)
1.230 + double y = 0;
1.231 + if (array->Count() == 3) {
1.232 + y = array->Item(2).GetAngleValueInRadians();
1.233 + }
1.234 + aFunctions.AppendElement(Skew(x, y));
1.235 + break;
1.236 + }
1.237 + case eCSSKeyword_matrix:
1.238 + {
1.239 + gfx::Matrix4x4 matrix;
1.240 + matrix._11 = array->Item(1).GetFloatValue();
1.241 + matrix._12 = array->Item(2).GetFloatValue();
1.242 + matrix._13 = 0;
1.243 + matrix._14 = 0;
1.244 + matrix._21 = array->Item(3).GetFloatValue();
1.245 + matrix._22 = array->Item(4).GetFloatValue();
1.246 + matrix._23 = 0;
1.247 + matrix._24 = 0;
1.248 + matrix._31 = 0;
1.249 + matrix._32 = 0;
1.250 + matrix._33 = 1;
1.251 + matrix._34 = 0;
1.252 + matrix._41 = array->Item(5).GetFloatValue();
1.253 + matrix._42 = array->Item(6).GetFloatValue();
1.254 + matrix._43 = 0;
1.255 + matrix._44 = 1;
1.256 + aFunctions.AppendElement(TransformMatrix(matrix));
1.257 + break;
1.258 + }
1.259 + case eCSSKeyword_matrix3d:
1.260 + {
1.261 + gfx::Matrix4x4 matrix;
1.262 + matrix._11 = array->Item(1).GetFloatValue();
1.263 + matrix._12 = array->Item(2).GetFloatValue();
1.264 + matrix._13 = array->Item(3).GetFloatValue();
1.265 + matrix._14 = array->Item(4).GetFloatValue();
1.266 + matrix._21 = array->Item(5).GetFloatValue();
1.267 + matrix._22 = array->Item(6).GetFloatValue();
1.268 + matrix._23 = array->Item(7).GetFloatValue();
1.269 + matrix._24 = array->Item(8).GetFloatValue();
1.270 + matrix._31 = array->Item(9).GetFloatValue();
1.271 + matrix._32 = array->Item(10).GetFloatValue();
1.272 + matrix._33 = array->Item(11).GetFloatValue();
1.273 + matrix._34 = array->Item(12).GetFloatValue();
1.274 + matrix._41 = array->Item(13).GetFloatValue();
1.275 + matrix._42 = array->Item(14).GetFloatValue();
1.276 + matrix._43 = array->Item(15).GetFloatValue();
1.277 + matrix._44 = array->Item(16).GetFloatValue();
1.278 + aFunctions.AppendElement(TransformMatrix(matrix));
1.279 + break;
1.280 + }
1.281 + case eCSSKeyword_interpolatematrix:
1.282 + {
1.283 + gfx3DMatrix matrix;
1.284 + nsStyleTransformMatrix::ProcessInterpolateMatrix(matrix, array,
1.285 + aContext,
1.286 + aPresContext,
1.287 + canStoreInRuleTree,
1.288 + aBounds,
1.289 + aAppUnitsPerPixel);
1.290 + gfx::Matrix4x4 transform;
1.291 + gfx::ToMatrix4x4(matrix, transform);
1.292 + aFunctions.AppendElement(TransformMatrix(transform));
1.293 + break;
1.294 + }
1.295 + case eCSSKeyword_perspective:
1.296 + {
1.297 + aFunctions.AppendElement(Perspective(array->Item(1).GetFloatValue()));
1.298 + break;
1.299 + }
1.300 + default:
1.301 + NS_ERROR("Function not handled yet!");
1.302 + }
1.303 + }
1.304 +}
1.305 +
1.306 +static TimingFunction
1.307 +ToTimingFunction(css::ComputedTimingFunction& aCTF)
1.308 +{
1.309 + if (aCTF.GetType() == nsTimingFunction::Function) {
1.310 + const nsSMILKeySpline* spline = aCTF.GetFunction();
1.311 + return TimingFunction(CubicBezierFunction(spline->X1(), spline->Y1(),
1.312 + spline->X2(), spline->Y2()));
1.313 + }
1.314 +
1.315 + uint32_t type = aCTF.GetType() == nsTimingFunction::StepStart ? 1 : 2;
1.316 + return TimingFunction(StepFunction(aCTF.GetSteps(), type));
1.317 +}
1.318 +
1.319 +static void
1.320 +AddAnimationForProperty(nsIFrame* aFrame, nsCSSProperty aProperty,
1.321 + mozilla::StyleAnimation* ea, Layer* aLayer,
1.322 + AnimationData& aData, bool aPending)
1.323 +{
1.324 + NS_ASSERTION(aLayer->AsContainerLayer(), "Should only animate ContainerLayer");
1.325 + nsStyleContext* styleContext = aFrame->StyleContext();
1.326 + nsPresContext* presContext = aFrame->PresContext();
1.327 + nsRect bounds = nsDisplayTransform::GetFrameBoundsForTransform(aFrame);
1.328 + // all data passed directly to the compositor should be in css pixels
1.329 + float scale = nsDeviceContext::AppUnitsPerCSSPixel();
1.330 +
1.331 + mozilla::layers::Animation* animation =
1.332 + aPending ?
1.333 + aLayer->AddAnimationForNextTransaction() :
1.334 + aLayer->AddAnimation();
1.335 +
1.336 + animation->startTime() = ea->mStartTime + ea->mDelay;
1.337 + animation->duration() = ea->mIterationDuration;
1.338 + animation->numIterations() =
1.339 + ea->mIterationCount != NS_IEEEPositiveInfinity() ? ea->mIterationCount : -1;
1.340 + animation->direction() = ea->mDirection;
1.341 + animation->property() = aProperty;
1.342 + animation->data() = aData;
1.343 +
1.344 + for (uint32_t propIdx = 0; propIdx < ea->mProperties.Length(); propIdx++) {
1.345 + AnimationProperty* property = &ea->mProperties[propIdx];
1.346 +
1.347 + if (aProperty != property->mProperty) {
1.348 + continue;
1.349 + }
1.350 +
1.351 + for (uint32_t segIdx = 0; segIdx < property->mSegments.Length(); segIdx++) {
1.352 + AnimationPropertySegment* segment = &property->mSegments[segIdx];
1.353 +
1.354 + AnimationSegment* animSegment = animation->segments().AppendElement();
1.355 + if (aProperty == eCSSProperty_transform) {
1.356 + animSegment->startState() = InfallibleTArray<TransformFunction>();
1.357 + animSegment->endState() = InfallibleTArray<TransformFunction>();
1.358 +
1.359 + nsCSSValueSharedList* list = segment->mFromValue.GetCSSValueSharedListValue();
1.360 + AddTransformFunctions(list->mHead, styleContext, presContext, bounds, scale,
1.361 + animSegment->startState().get_ArrayOfTransformFunction());
1.362 +
1.363 + list = segment->mToValue.GetCSSValueSharedListValue();
1.364 + AddTransformFunctions(list->mHead, styleContext, presContext, bounds, scale,
1.365 + animSegment->endState().get_ArrayOfTransformFunction());
1.366 + } else if (aProperty == eCSSProperty_opacity) {
1.367 + animSegment->startState() = segment->mFromValue.GetFloatValue();
1.368 + animSegment->endState() = segment->mToValue.GetFloatValue();
1.369 + }
1.370 +
1.371 + animSegment->startPortion() = segment->mFromKey;
1.372 + animSegment->endPortion() = segment->mToKey;
1.373 + animSegment->sampleFn() = ToTimingFunction(segment->mTimingFunction);
1.374 + }
1.375 + }
1.376 +}
1.377 +
1.378 +template<class T>
1.379 +static void
1.380 +AddAnimationsForProperty(nsIFrame* aFrame, nsCSSProperty aProperty,
1.381 + nsTArray<T>& aAnimations,
1.382 + Layer* aLayer, AnimationData& aData,
1.383 + bool aPending) {
1.384 + mozilla::TimeStamp currentTime =
1.385 + aFrame->PresContext()->RefreshDriver()->MostRecentRefresh();
1.386 + for (uint32_t animIdx = 0; animIdx < aAnimations.Length(); animIdx++) {
1.387 + mozilla::StyleAnimation* anim = &aAnimations[animIdx];
1.388 + if (!(anim->HasAnimationOfProperty(aProperty) &&
1.389 + anim->IsRunningAt(currentTime))) {
1.390 + continue;
1.391 + }
1.392 + AddAnimationForProperty(aFrame, aProperty, anim, aLayer, aData, aPending);
1.393 + anim->mIsRunningOnCompositor = true;
1.394 + }
1.395 +}
1.396 +
1.397 +/* static */ void
1.398 +nsDisplayListBuilder::AddAnimationsAndTransitionsToLayer(Layer* aLayer,
1.399 + nsDisplayListBuilder* aBuilder,
1.400 + nsDisplayItem* aItem,
1.401 + nsIFrame* aFrame,
1.402 + nsCSSProperty aProperty)
1.403 +{
1.404 + // This function can be called in two ways: from
1.405 + // nsDisplay*::BuildLayer while constructing a layer (with all
1.406 + // pointers non-null), or from RestyleManager's handling of
1.407 + // UpdateOpacityLayer/UpdateTransformLayer hints.
1.408 + MOZ_ASSERT(!aBuilder == !aItem,
1.409 + "should only be called in two configurations, with both "
1.410 + "aBuilder and aItem, or with neither");
1.411 + MOZ_ASSERT(!aItem || aFrame == aItem->Frame(), "frame mismatch");
1.412 +
1.413 + bool pending = !aBuilder;
1.414 +
1.415 + if (pending) {
1.416 + aLayer->ClearAnimationsForNextTransaction();
1.417 + } else {
1.418 + aLayer->ClearAnimations();
1.419 + }
1.420 +
1.421 + nsIContent* content = aFrame->GetContent();
1.422 + if (!content) {
1.423 + return;
1.424 + }
1.425 + ElementTransitions* et =
1.426 + nsTransitionManager::GetTransitionsForCompositor(content, aProperty);
1.427 +
1.428 + ElementAnimations* ea =
1.429 + nsAnimationManager::GetAnimationsForCompositor(content, aProperty);
1.430 +
1.431 + if (!ea && !et) {
1.432 + return;
1.433 + }
1.434 +
1.435 + // If the frame is not prerendered, bail out.
1.436 + // Do this check only during layer construction; during updating the
1.437 + // caller is required to check it appropriately.
1.438 + if (aItem && !aItem->CanUseAsyncAnimations(aBuilder)) {
1.439 + // AnimationManager or TransitionManager need to know that we refused to
1.440 + // run this animation asynchronously so that they will not throttle the
1.441 + // main thread animation.
1.442 + aFrame->Properties().Set(nsIFrame::RefusedAsyncAnimation(),
1.443 + reinterpret_cast<void*>(intptr_t(true)));
1.444 +
1.445 + // We need to schedule another refresh driver run so that AnimationManager
1.446 + // or TransitionManager get a chance to unthrottle the animation.
1.447 + aFrame->SchedulePaint();
1.448 + return;
1.449 + }
1.450 +
1.451 + AnimationData data;
1.452 + if (aProperty == eCSSProperty_transform) {
1.453 + nsRect bounds = nsDisplayTransform::GetFrameBoundsForTransform(aFrame);
1.454 + // all data passed directly to the compositor should be in css pixels
1.455 + float scale = nsDeviceContext::AppUnitsPerCSSPixel();
1.456 + gfxPoint3D offsetToTransformOrigin =
1.457 + nsDisplayTransform::GetDeltaToTransformOrigin(aFrame, scale, &bounds);
1.458 + gfxPoint3D offsetToPerspectiveOrigin =
1.459 + nsDisplayTransform::GetDeltaToPerspectiveOrigin(aFrame, scale);
1.460 + nscoord perspective = 0.0;
1.461 + nsStyleContext* parentStyleContext = aFrame->StyleContext()->GetParent();
1.462 + if (parentStyleContext) {
1.463 + const nsStyleDisplay* disp = parentStyleContext->StyleDisplay();
1.464 + if (disp && disp->mChildPerspective.GetUnit() == eStyleUnit_Coord) {
1.465 + perspective = disp->mChildPerspective.GetCoordValue();
1.466 + }
1.467 + }
1.468 + nsPoint origin;
1.469 + if (aItem) {
1.470 + origin = aItem->ToReferenceFrame();
1.471 + } else {
1.472 + // transform display items used a reference frame computed from
1.473 + // their GetTransformRootFrame().
1.474 + nsIFrame* referenceFrame =
1.475 + nsLayoutUtils::GetReferenceFrame(GetTransformRootFrame(aFrame));
1.476 + origin = aFrame->GetOffsetToCrossDoc(referenceFrame);
1.477 + }
1.478 +
1.479 + data = TransformData(origin, offsetToTransformOrigin,
1.480 + offsetToPerspectiveOrigin, bounds, perspective,
1.481 + aFrame->PresContext()->AppUnitsPerDevPixel());
1.482 + } else if (aProperty == eCSSProperty_opacity) {
1.483 + data = null_t();
1.484 + }
1.485 +
1.486 + if (et) {
1.487 + AddAnimationsForProperty(aFrame, aProperty, et->mPropertyTransitions,
1.488 + aLayer, data, pending);
1.489 + aLayer->SetAnimationGeneration(et->mAnimationGeneration);
1.490 + }
1.491 +
1.492 + if (ea) {
1.493 + AddAnimationsForProperty(aFrame, aProperty, ea->mAnimations,
1.494 + aLayer, data, pending);
1.495 + aLayer->SetAnimationGeneration(ea->mAnimationGeneration);
1.496 + }
1.497 +}
1.498 +
1.499 +nsDisplayListBuilder::nsDisplayListBuilder(nsIFrame* aReferenceFrame,
1.500 + Mode aMode, bool aBuildCaret)
1.501 + : mReferenceFrame(aReferenceFrame),
1.502 + mIgnoreScrollFrame(nullptr),
1.503 + mLayerEventRegions(nullptr),
1.504 + mCurrentTableItem(nullptr),
1.505 + mFinalTransparentRegion(nullptr),
1.506 + mCachedOffsetFrame(aReferenceFrame),
1.507 + mCachedReferenceFrame(aReferenceFrame),
1.508 + mCachedOffset(0, 0),
1.509 + mGlassDisplayItem(nullptr),
1.510 + mMode(aMode),
1.511 + mCurrentScrollParentId(FrameMetrics::NULL_SCROLL_ID),
1.512 + mBuildCaret(aBuildCaret),
1.513 + mIgnoreSuppression(false),
1.514 + mHadToIgnoreSuppression(false),
1.515 + mIsAtRootOfPseudoStackingContext(false),
1.516 + mIncludeAllOutOfFlows(false),
1.517 + mDescendIntoSubdocuments(true),
1.518 + mSelectedFramesOnly(false),
1.519 + mAccurateVisibleRegions(false),
1.520 + mAllowMergingAndFlattening(true),
1.521 + mWillComputePluginGeometry(false),
1.522 + mInTransform(false),
1.523 + mInFixedPos(false),
1.524 + mSyncDecodeImages(false),
1.525 + mIsPaintingToWindow(false),
1.526 + mIsCompositingCheap(false),
1.527 + mContainsPluginItem(false),
1.528 + mContainsBlendMode(false),
1.529 + mAncestorHasTouchEventHandler(false),
1.530 + mHaveScrollableDisplayPort(false)
1.531 +{
1.532 + MOZ_COUNT_CTOR(nsDisplayListBuilder);
1.533 + PL_InitArenaPool(&mPool, "displayListArena", 1024,
1.534 + std::max(NS_ALIGNMENT_OF(void*),NS_ALIGNMENT_OF(double))-1);
1.535 +
1.536 + nsPresContext* pc = aReferenceFrame->PresContext();
1.537 + nsIPresShell *shell = pc->PresShell();
1.538 + if (pc->IsRenderingOnlySelection()) {
1.539 + nsCOMPtr<nsISelectionController> selcon(do_QueryInterface(shell));
1.540 + if (selcon) {
1.541 + selcon->GetSelection(nsISelectionController::SELECTION_NORMAL,
1.542 + getter_AddRefs(mBoundingSelection));
1.543 + }
1.544 + }
1.545 +
1.546 + nsCSSRendering::BeginFrameTreesLocked();
1.547 + PR_STATIC_ASSERT(nsDisplayItem::TYPE_MAX < (1 << nsDisplayItem::TYPE_BITS));
1.548 +}
1.549 +
1.550 +static void MarkFrameForDisplay(nsIFrame* aFrame, nsIFrame* aStopAtFrame) {
1.551 + for (nsIFrame* f = aFrame; f;
1.552 + f = nsLayoutUtils::GetParentOrPlaceholderFor(f)) {
1.553 + if (f->GetStateBits() & NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO)
1.554 + return;
1.555 + f->AddStateBits(NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO);
1.556 + if (f == aStopAtFrame) {
1.557 + // we've reached a frame that we know will be painted, so we can stop.
1.558 + break;
1.559 + }
1.560 + }
1.561 +}
1.562 +
1.563 +void nsDisplayListBuilder::MarkOutOfFlowFrameForDisplay(nsIFrame* aDirtyFrame,
1.564 + nsIFrame* aFrame,
1.565 + const nsRect& aDirtyRect)
1.566 +{
1.567 + nsRect dirtyRectRelativeToDirtyFrame = aDirtyRect;
1.568 + if (nsLayoutUtils::IsFixedPosFrameInDisplayPort(aFrame)) {
1.569 + NS_ASSERTION(aDirtyFrame == aFrame->GetParent(), "Dirty frame should be viewport frame");
1.570 + // position: fixed items are reflowed into and only drawn inside the
1.571 + // viewport, or the scroll position clamping scrollport size, if one is
1.572 + // set.
1.573 + nsIPresShell* ps = aFrame->PresContext()->PresShell();
1.574 + dirtyRectRelativeToDirtyFrame.MoveTo(0, 0);
1.575 + if (ps->IsScrollPositionClampingScrollPortSizeSet()) {
1.576 + dirtyRectRelativeToDirtyFrame.SizeTo(ps->GetScrollPositionClampingScrollPortSize());
1.577 + } else {
1.578 + dirtyRectRelativeToDirtyFrame.SizeTo(aDirtyFrame->GetSize());
1.579 + }
1.580 + }
1.581 +
1.582 + nsRect dirty = dirtyRectRelativeToDirtyFrame - aFrame->GetOffsetTo(aDirtyFrame);
1.583 + nsRect overflowRect = aFrame->GetVisualOverflowRect();
1.584 +
1.585 + if (aFrame->IsTransformed() &&
1.586 + nsLayoutUtils::HasAnimationsForCompositor(aFrame->GetContent(),
1.587 + eCSSProperty_transform)) {
1.588 + /**
1.589 + * Add a fuzz factor to the overflow rectangle so that elements only just
1.590 + * out of view are pulled into the display list, so they can be
1.591 + * prerendered if necessary.
1.592 + */
1.593 + overflowRect.Inflate(nsPresContext::CSSPixelsToAppUnits(32));
1.594 + }
1.595 +
1.596 + if (!dirty.IntersectRect(dirty, overflowRect))
1.597 + return;
1.598 + const DisplayItemClip* clip = mClipState.GetClipForContainingBlockDescendants();
1.599 + OutOfFlowDisplayData* data = clip ? new OutOfFlowDisplayData(*clip, dirty)
1.600 + : new OutOfFlowDisplayData(dirty);
1.601 + aFrame->Properties().Set(nsDisplayListBuilder::OutOfFlowDisplayDataProperty(), data);
1.602 +
1.603 + MarkFrameForDisplay(aFrame, aDirtyFrame);
1.604 +}
1.605 +
1.606 +static void UnmarkFrameForDisplay(nsIFrame* aFrame) {
1.607 + nsPresContext* presContext = aFrame->PresContext();
1.608 + presContext->PropertyTable()->
1.609 + Delete(aFrame, nsDisplayListBuilder::OutOfFlowDisplayDataProperty());
1.610 +
1.611 + for (nsIFrame* f = aFrame; f;
1.612 + f = nsLayoutUtils::GetParentOrPlaceholderFor(f)) {
1.613 + if (!(f->GetStateBits() & NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO))
1.614 + return;
1.615 + f->RemoveStateBits(NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO);
1.616 + }
1.617 +}
1.618 +
1.619 +static bool gPrintApzcTree = false;
1.620 +
1.621 +static bool GetApzcTreePrintPref() {
1.622 + static bool initialized = false;
1.623 + if (!initialized) {
1.624 + Preferences::AddBoolVarCache(&gPrintApzcTree, "apz.printtree", gPrintApzcTree);
1.625 + initialized = true;
1.626 + }
1.627 + return gPrintApzcTree;
1.628 +}
1.629 +
1.630 +static void RecordFrameMetrics(nsIFrame* aForFrame,
1.631 + nsIFrame* aScrollFrame,
1.632 + const nsIFrame* aReferenceFrame,
1.633 + ContainerLayer* aRoot,
1.634 + const nsRect& aVisibleRect,
1.635 + const nsRect& aViewport,
1.636 + nsRect* aDisplayPort,
1.637 + nsRect* aCriticalDisplayPort,
1.638 + ViewID aScrollId,
1.639 + bool aIsRoot,
1.640 + const ContainerLayerParameters& aContainerParameters) {
1.641 + nsPresContext* presContext = aForFrame->PresContext();
1.642 + int32_t auPerDevPixel = presContext->AppUnitsPerDevPixel();
1.643 + LayoutDeviceToLayerScale resolution(aContainerParameters.mXScale, aContainerParameters.mYScale);
1.644 +
1.645 + nsIntRect visible = aVisibleRect.ScaleToNearestPixels(
1.646 + resolution.scale, resolution.scale, auPerDevPixel);
1.647 + aRoot->SetVisibleRegion(visible);
1.648 +
1.649 + FrameMetrics metrics;
1.650 + metrics.mViewport = CSSRect::FromAppUnits(aViewport);
1.651 + if (aDisplayPort) {
1.652 + metrics.mDisplayPort = CSSRect::FromAppUnits(*aDisplayPort);
1.653 + if (aCriticalDisplayPort) {
1.654 + metrics.mCriticalDisplayPort = CSSRect::FromAppUnits(*aCriticalDisplayPort);
1.655 + }
1.656 + }
1.657 +
1.658 + nsIScrollableFrame* scrollableFrame = nullptr;
1.659 + if (aScrollFrame)
1.660 + scrollableFrame = aScrollFrame->GetScrollTargetFrame();
1.661 +
1.662 + metrics.mScrollableRect = CSSRect::FromAppUnits(
1.663 + nsLayoutUtils::CalculateScrollableRectForFrame(scrollableFrame, aForFrame));
1.664 +
1.665 + if (scrollableFrame) {
1.666 + nsPoint scrollPosition = scrollableFrame->GetScrollPosition();
1.667 + metrics.SetScrollOffset(CSSPoint::FromAppUnits(scrollPosition));
1.668 +
1.669 + // If the frame was scrolled since the last layers update, and by
1.670 + // something other than the APZ code, we want to tell the APZ to update
1.671 + // its scroll offset.
1.672 + nsIAtom* originOfLastScroll = scrollableFrame->OriginOfLastScroll();
1.673 + if (originOfLastScroll && originOfLastScroll != nsGkAtoms::apz) {
1.674 + metrics.SetScrollOffsetUpdated(scrollableFrame->CurrentScrollGeneration());
1.675 + }
1.676 + }
1.677 +
1.678 + metrics.SetScrollId(aScrollId);
1.679 + metrics.mIsRoot = aIsRoot;
1.680 +
1.681 + // Only the root scrollable frame for a given presShell should pick up
1.682 + // the presShell's resolution. All the other frames are 1.0.
1.683 + nsIPresShell* presShell = presContext->GetPresShell();
1.684 + if (aScrollFrame == presShell->GetRootScrollFrame()) {
1.685 + metrics.mResolution = ParentLayerToLayerScale(presShell->GetXResolution(),
1.686 + presShell->GetYResolution());
1.687 + } else {
1.688 + metrics.mResolution = ParentLayerToLayerScale(1.0f);
1.689 + }
1.690 +
1.691 + // For the cumulateive resolution, multiply the resolutions of all the
1.692 + // presShells back up to the root
1.693 + metrics.mCumulativeResolution = LayoutDeviceToLayerScale(1.0f);
1.694 + nsIPresShell* curPresShell = presShell;
1.695 + while (curPresShell != nullptr) {
1.696 + ParentLayerToLayerScale presShellResolution(curPresShell->GetXResolution(),
1.697 + curPresShell->GetYResolution());
1.698 + metrics.mCumulativeResolution.scale *= presShellResolution.scale;
1.699 + nsPresContext* parentContext = curPresShell->GetPresContext()->GetParentPresContext();
1.700 + curPresShell = parentContext ? parentContext->GetPresShell() : nullptr;
1.701 + }
1.702 +
1.703 + metrics.mDevPixelsPerCSSPixel = CSSToLayoutDeviceScale(
1.704 + (float)nsPresContext::AppUnitsPerCSSPixel() / auPerDevPixel);
1.705 +
1.706 + // Initially, AsyncPanZoomController should render the content to the screen
1.707 + // at the painted resolution.
1.708 + const LayerToScreenScale layerToScreenScale(1.0f);
1.709 + metrics.SetZoom(metrics.mCumulativeResolution * metrics.mDevPixelsPerCSSPixel
1.710 + * layerToScreenScale);
1.711 +
1.712 + if (presShell) {
1.713 + nsIDocument* document = nullptr;
1.714 + document = presShell->GetDocument();
1.715 + if (document) {
1.716 + nsCOMPtr<nsPIDOMWindow> innerWin(document->GetInnerWindow());
1.717 + if (innerWin) {
1.718 + metrics.mMayHaveTouchListeners = innerWin->HasTouchEventListeners();
1.719 + }
1.720 + }
1.721 + }
1.722 +
1.723 + LayoutDeviceToParentLayerScale layoutToParentLayerScale =
1.724 + // The ScreenToParentLayerScale should be mTransformScale which is not calculated yet,
1.725 + // but we don't yet handle CSS transforms, so we assume it's 1 here.
1.726 + metrics.mCumulativeResolution * LayerToScreenScale(1.0) * ScreenToParentLayerScale(1.0);
1.727 +
1.728 + // Calculate the composition bounds as the size of the scroll frame and
1.729 + // its origin relative to the reference frame.
1.730 + // If aScrollFrame is null, we are in a document without a root scroll frame,
1.731 + // so it's a xul document. In this case, use the size of the viewport frame.
1.732 + nsIFrame* frameForCompositionBoundsCalculation = aScrollFrame ? aScrollFrame : aForFrame;
1.733 + nsRect compositionBounds(frameForCompositionBoundsCalculation->GetOffsetToCrossDoc(aReferenceFrame),
1.734 + frameForCompositionBoundsCalculation->GetSize());
1.735 + metrics.mCompositionBounds = RoundedToInt(LayoutDeviceRect::FromAppUnits(compositionBounds, auPerDevPixel)
1.736 + * layoutToParentLayerScale);
1.737 +
1.738 +
1.739 + // For the root scroll frame of the root content document, the above calculation
1.740 + // will yield the size of the viewport frame as the composition bounds, which
1.741 + // doesn't actually correspond to what is visible when
1.742 + // nsIDOMWindowUtils::setCSSViewport has been called to modify the visible area of
1.743 + // the prescontext that the viewport frame is reflowed into. In that case if our
1.744 + // document has a widget then the widget's bounds will correspond to what is
1.745 + // visible. If we don't have a widget the root view's bounds correspond to what
1.746 + // would be visible because they don't get modified by setCSSViewport.
1.747 + bool isRootContentDocRootScrollFrame = presContext->IsRootContentDocument()
1.748 + && aScrollFrame == presShell->GetRootScrollFrame();
1.749 + if (isRootContentDocRootScrollFrame) {
1.750 + if (nsIFrame* rootFrame = presShell->GetRootFrame()) {
1.751 + if (nsView* view = rootFrame->GetView()) {
1.752 + nsRect viewBoundsAppUnits = view->GetBounds() + rootFrame->GetOffsetToCrossDoc(aReferenceFrame);
1.753 + ParentLayerIntRect viewBounds = RoundedToInt(LayoutDeviceRect::FromAppUnits(viewBoundsAppUnits, auPerDevPixel)
1.754 + * layoutToParentLayerScale);
1.755 +
1.756 + // On Android, we need to do things a bit differently to get things
1.757 + // right (see bug 983208, bug 988882). We use the bounds of the nearest
1.758 + // widget, but clamp the height to the view bounds height. This clamping
1.759 + // is done to get correct results for a page where the page is sized to
1.760 + // the screen and thus the dynamic toolbar never disappears. In such a
1.761 + // case, we want the composition bounds to exclude the toolbar height,
1.762 + // but the widget bounds includes it. We don't currently have a good way
1.763 + // of knowing about the toolbar height, but clamping to the view bounds
1.764 + // height gives the correct answer in the cases we care about.
1.765 + nsIWidget* widget =
1.766 +#ifdef MOZ_WIDGET_ANDROID
1.767 + rootFrame->GetNearestWidget();
1.768 +#else
1.769 + view->GetWidget();
1.770 +#endif
1.771 + if (widget) {
1.772 + nsIntRect widgetBounds;
1.773 + widget->GetBounds(widgetBounds);
1.774 + metrics.mCompositionBounds = ViewAs<ParentLayerPixel>(widgetBounds);
1.775 +#ifdef MOZ_WIDGET_ANDROID
1.776 + if (viewBounds.height < metrics.mCompositionBounds.height) {
1.777 + metrics.mCompositionBounds.height = viewBounds.height;
1.778 + }
1.779 +#endif
1.780 + } else {
1.781 + metrics.mCompositionBounds = viewBounds;
1.782 + }
1.783 + }
1.784 + }
1.785 + }
1.786 +
1.787 + // Adjust composition bounds for the size of scroll bars.
1.788 + if (scrollableFrame && !LookAndFeel::GetInt(LookAndFeel::eIntID_UseOverlayScrollbars)) {
1.789 + nsMargin sizes = scrollableFrame->GetActualScrollbarSizes();
1.790 + // Scrollbars are not subject to scaling, so CSS pixels = layer pixels for them.
1.791 + ParentLayerIntMargin boundMargins = RoundedToInt(CSSMargin::FromAppUnits(sizes) * CSSToParentLayerScale(1.0f));
1.792 + metrics.mCompositionBounds.Deflate(boundMargins);
1.793 + }
1.794 +
1.795 + metrics.SetRootCompositionSize(
1.796 + nsLayoutUtils::CalculateRootCompositionSize(aScrollFrame ? aScrollFrame : aForFrame,
1.797 + isRootContentDocRootScrollFrame, metrics));
1.798 +
1.799 + if (GetApzcTreePrintPref()) {
1.800 + if (nsIContent* content = frameForCompositionBoundsCalculation->GetContent()) {
1.801 + nsAutoString contentDescription;
1.802 + content->Describe(contentDescription);
1.803 + metrics.SetContentDescription(NS_LossyConvertUTF16toASCII(contentDescription).get());
1.804 + }
1.805 + }
1.806 +
1.807 + metrics.mPresShellId = presShell->GetPresShellId();
1.808 +
1.809 + // If the scroll frame's content is marked 'scrollgrab', record this
1.810 + // in the FrameMetrics so APZ knows to provide the scroll grabbing
1.811 + // behaviour.
1.812 + if (aScrollFrame && nsContentUtils::HasScrollgrab(aScrollFrame->GetContent())) {
1.813 + metrics.mHasScrollgrab = true;
1.814 + }
1.815 +
1.816 + aRoot->SetFrameMetrics(metrics);
1.817 +}
1.818 +
1.819 +nsDisplayListBuilder::~nsDisplayListBuilder() {
1.820 + NS_ASSERTION(mFramesMarkedForDisplay.Length() == 0,
1.821 + "All frames should have been unmarked");
1.822 + NS_ASSERTION(mPresShellStates.Length() == 0,
1.823 + "All presshells should have been exited");
1.824 + NS_ASSERTION(!mCurrentTableItem, "No table item should be active");
1.825 +
1.826 + nsCSSRendering::EndFrameTreesLocked();
1.827 +
1.828 + for (uint32_t i = 0; i < mDisplayItemClipsToDestroy.Length(); ++i) {
1.829 + mDisplayItemClipsToDestroy[i]->DisplayItemClip::~DisplayItemClip();
1.830 + }
1.831 +
1.832 + PL_FinishArenaPool(&mPool);
1.833 + MOZ_COUNT_DTOR(nsDisplayListBuilder);
1.834 +}
1.835 +
1.836 +uint32_t
1.837 +nsDisplayListBuilder::GetBackgroundPaintFlags() {
1.838 + uint32_t flags = 0;
1.839 + if (mSyncDecodeImages) {
1.840 + flags |= nsCSSRendering::PAINTBG_SYNC_DECODE_IMAGES;
1.841 + }
1.842 + if (mIsPaintingToWindow) {
1.843 + flags |= nsCSSRendering::PAINTBG_TO_WINDOW;
1.844 + }
1.845 + return flags;
1.846 +}
1.847 +
1.848 +void
1.849 +nsDisplayListBuilder::SubtractFromVisibleRegion(nsRegion* aVisibleRegion,
1.850 + const nsRegion& aRegion)
1.851 +{
1.852 + if (aRegion.IsEmpty())
1.853 + return;
1.854 +
1.855 + nsRegion tmp;
1.856 + tmp.Sub(*aVisibleRegion, aRegion);
1.857 + // Don't let *aVisibleRegion get too complex, but don't let it fluff out
1.858 + // to its bounds either, which can be very bad (see bug 516740).
1.859 + // Do let aVisibleRegion get more complex if by doing so we reduce its
1.860 + // area by at least half.
1.861 + if (GetAccurateVisibleRegions() || tmp.GetNumRects() <= 15 ||
1.862 + tmp.Area() <= aVisibleRegion->Area()/2) {
1.863 + *aVisibleRegion = tmp;
1.864 + }
1.865 +}
1.866 +
1.867 +nsCaret *
1.868 +nsDisplayListBuilder::GetCaret() {
1.869 + nsRefPtr<nsCaret> caret = CurrentPresShellState()->mPresShell->GetCaret();
1.870 + return caret;
1.871 +}
1.872 +
1.873 +void
1.874 +nsDisplayListBuilder::EnterPresShell(nsIFrame* aReferenceFrame,
1.875 + const nsRect& aDirtyRect) {
1.876 + PresShellState* state = mPresShellStates.AppendElement();
1.877 + if (!state)
1.878 + return;
1.879 + state->mPresShell = aReferenceFrame->PresContext()->PresShell();
1.880 + state->mCaretFrame = nullptr;
1.881 + state->mFirstFrameMarkedForDisplay = mFramesMarkedForDisplay.Length();
1.882 +
1.883 + state->mPresShell->UpdateCanvasBackground();
1.884 +
1.885 + if (mIsPaintingToWindow) {
1.886 + mReferenceFrame->AddPaintedPresShell(state->mPresShell);
1.887 +
1.888 + state->mPresShell->IncrementPaintCount();
1.889 + }
1.890 +
1.891 + bool buildCaret = mBuildCaret;
1.892 + if (mIgnoreSuppression || !state->mPresShell->IsPaintingSuppressed()) {
1.893 + if (state->mPresShell->IsPaintingSuppressed()) {
1.894 + mHadToIgnoreSuppression = true;
1.895 + }
1.896 + state->mIsBackgroundOnly = false;
1.897 + } else {
1.898 + state->mIsBackgroundOnly = true;
1.899 + buildCaret = false;
1.900 + }
1.901 +
1.902 + if (!buildCaret)
1.903 + return;
1.904 +
1.905 + nsRefPtr<nsCaret> caret = state->mPresShell->GetCaret();
1.906 + state->mCaretFrame = caret->GetCaretFrame();
1.907 + NS_ASSERTION(state->mCaretFrame == caret->GetCaretFrame(),
1.908 + "GetCaretFrame() is unstable");
1.909 +
1.910 + if (state->mCaretFrame) {
1.911 + // Check if the dirty rect intersects with the caret's dirty rect.
1.912 + nsRect caretRect =
1.913 + caret->GetCaretRect() + state->mCaretFrame->GetOffsetTo(aReferenceFrame);
1.914 + if (caretRect.Intersects(aDirtyRect)) {
1.915 + // Okay, our rects intersect, let's mark the frame and all of its ancestors.
1.916 + mFramesMarkedForDisplay.AppendElement(state->mCaretFrame);
1.917 + MarkFrameForDisplay(state->mCaretFrame, nullptr);
1.918 + }
1.919 + }
1.920 +}
1.921 +
1.922 +void
1.923 +nsDisplayListBuilder::LeavePresShell(nsIFrame* aReferenceFrame,
1.924 + const nsRect& aDirtyRect) {
1.925 + if (CurrentPresShellState()->mPresShell != aReferenceFrame->PresContext()->PresShell()) {
1.926 + // Must have not allocated a state for this presshell, presumably due
1.927 + // to OOM.
1.928 + return;
1.929 + }
1.930 +
1.931 + ResetMarkedFramesForDisplayList();
1.932 + mPresShellStates.SetLength(mPresShellStates.Length() - 1);
1.933 +}
1.934 +
1.935 +void
1.936 +nsDisplayListBuilder::ResetMarkedFramesForDisplayList()
1.937 +{
1.938 + // Unmark and pop off the frames marked for display in this pres shell.
1.939 + uint32_t firstFrameForShell = CurrentPresShellState()->mFirstFrameMarkedForDisplay;
1.940 + for (uint32_t i = firstFrameForShell;
1.941 + i < mFramesMarkedForDisplay.Length(); ++i) {
1.942 + UnmarkFrameForDisplay(mFramesMarkedForDisplay[i]);
1.943 + }
1.944 + mFramesMarkedForDisplay.SetLength(firstFrameForShell);
1.945 +}
1.946 +
1.947 +void
1.948 +nsDisplayListBuilder::MarkFramesForDisplayList(nsIFrame* aDirtyFrame,
1.949 + const nsFrameList& aFrames,
1.950 + const nsRect& aDirtyRect) {
1.951 + mFramesMarkedForDisplay.SetCapacity(mFramesMarkedForDisplay.Length() + aFrames.GetLength());
1.952 + for (nsFrameList::Enumerator e(aFrames); !e.AtEnd(); e.Next()) {
1.953 + mFramesMarkedForDisplay.AppendElement(e.get());
1.954 + MarkOutOfFlowFrameForDisplay(aDirtyFrame, e.get(), aDirtyRect);
1.955 + }
1.956 +}
1.957 +
1.958 +void
1.959 +nsDisplayListBuilder::MarkPreserve3DFramesForDisplayList(nsIFrame* aDirtyFrame, const nsRect& aDirtyRect)
1.960 +{
1.961 + nsAutoTArray<nsIFrame::ChildList,4> childListArray;
1.962 + aDirtyFrame->GetChildLists(&childListArray);
1.963 + nsIFrame::ChildListArrayIterator lists(childListArray);
1.964 + for (; !lists.IsDone(); lists.Next()) {
1.965 + nsFrameList::Enumerator childFrames(lists.CurrentList());
1.966 + for (; !childFrames.AtEnd(); childFrames.Next()) {
1.967 + nsIFrame *child = childFrames.get();
1.968 + if (child->Preserves3D()) {
1.969 + mFramesMarkedForDisplay.AppendElement(child);
1.970 + nsRect dirty = aDirtyRect - child->GetOffsetTo(aDirtyFrame);
1.971 +
1.972 + child->Properties().Set(nsDisplayListBuilder::Preserve3DDirtyRectProperty(),
1.973 + new nsRect(dirty));
1.974 +
1.975 + MarkFrameForDisplay(child, aDirtyFrame);
1.976 + }
1.977 + }
1.978 + }
1.979 +}
1.980 +
1.981 +void*
1.982 +nsDisplayListBuilder::Allocate(size_t aSize) {
1.983 + void *tmp;
1.984 + PL_ARENA_ALLOCATE(tmp, &mPool, aSize);
1.985 + if (!tmp) {
1.986 + NS_RUNTIMEABORT("out of memory");
1.987 + }
1.988 + return tmp;
1.989 +}
1.990 +
1.991 +const DisplayItemClip*
1.992 +nsDisplayListBuilder::AllocateDisplayItemClip(const DisplayItemClip& aOriginal)
1.993 +{
1.994 + void* p = Allocate(sizeof(DisplayItemClip));
1.995 + if (!aOriginal.GetRoundedRectCount()) {
1.996 + memcpy(p, &aOriginal, sizeof(DisplayItemClip));
1.997 + return static_cast<DisplayItemClip*>(p);
1.998 + }
1.999 +
1.1000 + DisplayItemClip* c = new (p) DisplayItemClip(aOriginal);
1.1001 + mDisplayItemClipsToDestroy.AppendElement(c);
1.1002 + return c;
1.1003 +}
1.1004 +
1.1005 +void nsDisplayListSet::MoveTo(const nsDisplayListSet& aDestination) const
1.1006 +{
1.1007 + aDestination.BorderBackground()->AppendToTop(BorderBackground());
1.1008 + aDestination.BlockBorderBackgrounds()->AppendToTop(BlockBorderBackgrounds());
1.1009 + aDestination.Floats()->AppendToTop(Floats());
1.1010 + aDestination.Content()->AppendToTop(Content());
1.1011 + aDestination.PositionedDescendants()->AppendToTop(PositionedDescendants());
1.1012 + aDestination.Outlines()->AppendToTop(Outlines());
1.1013 +}
1.1014 +
1.1015 +void
1.1016 +nsDisplayList::FlattenTo(nsTArray<nsDisplayItem*>* aElements) {
1.1017 + nsDisplayItem* item;
1.1018 + while ((item = RemoveBottom()) != nullptr) {
1.1019 + if (item->GetType() == nsDisplayItem::TYPE_WRAP_LIST) {
1.1020 + item->GetSameCoordinateSystemChildren()->FlattenTo(aElements);
1.1021 + item->~nsDisplayItem();
1.1022 + } else {
1.1023 + aElements->AppendElement(item);
1.1024 + }
1.1025 + }
1.1026 +}
1.1027 +
1.1028 +nsRect
1.1029 +nsDisplayList::GetBounds(nsDisplayListBuilder* aBuilder) const {
1.1030 + nsRect bounds;
1.1031 + for (nsDisplayItem* i = GetBottom(); i != nullptr; i = i->GetAbove()) {
1.1032 + bounds.UnionRect(bounds, i->GetClippedBounds(aBuilder));
1.1033 + }
1.1034 + return bounds;
1.1035 +}
1.1036 +
1.1037 +bool
1.1038 +nsDisplayList::ComputeVisibilityForRoot(nsDisplayListBuilder* aBuilder,
1.1039 + nsRegion* aVisibleRegion,
1.1040 + nsIFrame* aDisplayPortFrame) {
1.1041 + PROFILER_LABEL("nsDisplayList", "ComputeVisibilityForRoot");
1.1042 + nsRegion r;
1.1043 + r.And(*aVisibleRegion, GetBounds(aBuilder));
1.1044 + return ComputeVisibilityForSublist(aBuilder, aVisibleRegion,
1.1045 + r.GetBounds(), r.GetBounds(),
1.1046 + aDisplayPortFrame);
1.1047 +}
1.1048 +
1.1049 +static nsRegion
1.1050 +TreatAsOpaque(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder)
1.1051 +{
1.1052 + bool snap;
1.1053 + nsRegion opaque = aItem->GetOpaqueRegion(aBuilder, &snap);
1.1054 + if (aBuilder->IsForPluginGeometry()) {
1.1055 + // Treat all leaf chrome items as opaque, unless their frames are opacity:0.
1.1056 + // Since opacity:0 frames generate an nsDisplayOpacity, that item will
1.1057 + // not be treated as opaque here, so opacity:0 chrome content will be
1.1058 + // effectively ignored, as it should be.
1.1059 + // We treat leaf chrome items as opaque to ensure that they cover
1.1060 + // content plugins, for security reasons.
1.1061 + // Non-leaf chrome items don't render contents of their own so shouldn't
1.1062 + // be treated as opaque (and their bounds is just the union of their
1.1063 + // children, which might be a large area their contents don't really cover).
1.1064 + nsIFrame* f = aItem->Frame();
1.1065 + if (f->PresContext()->IsChrome() && !aItem->GetChildren() &&
1.1066 + f->StyleDisplay()->mOpacity != 0.0) {
1.1067 + opaque = aItem->GetBounds(aBuilder, &snap);
1.1068 + }
1.1069 + }
1.1070 + if (opaque.IsEmpty()) {
1.1071 + return opaque;
1.1072 + }
1.1073 + nsRegion opaqueClipped;
1.1074 + nsRegionRectIterator iter(opaque);
1.1075 + for (const nsRect* r = iter.Next(); r; r = iter.Next()) {
1.1076 + opaqueClipped.Or(opaqueClipped, aItem->GetClip().ApproximateIntersectInward(*r));
1.1077 + }
1.1078 + return opaqueClipped;
1.1079 +}
1.1080 +
1.1081 +/* Checks if aPotentialScrollItem is a scroll layer item and aPotentialScrollbarItem
1.1082 + * is an overlay scrollbar item for the same scroll frame.
1.1083 + */
1.1084 +static bool
1.1085 +IsScrollLayerItemAndOverlayScrollbarForScrollFrame(
1.1086 + nsDisplayItem* aPotentialScrollItem, nsDisplayItem* aPotentialScrollbarItem)
1.1087 +{
1.1088 + if (aPotentialScrollItem->GetType() == nsDisplayItem::TYPE_SCROLL_LAYER &&
1.1089 + aPotentialScrollbarItem &&
1.1090 + aPotentialScrollbarItem->GetType() == nsDisplayItem::TYPE_OWN_LAYER &&
1.1091 + LookAndFeel::GetInt(LookAndFeel::eIntID_UseOverlayScrollbars)) {
1.1092 + nsDisplayScrollLayer* scrollItem =
1.1093 + static_cast<nsDisplayScrollLayer*>(aPotentialScrollItem);
1.1094 + nsDisplayOwnLayer* layerItem =
1.1095 + static_cast<nsDisplayOwnLayer*>(aPotentialScrollbarItem);
1.1096 + if ((layerItem->GetFlags() &
1.1097 + (nsDisplayOwnLayer::VERTICAL_SCROLLBAR |
1.1098 + nsDisplayOwnLayer::HORIZONTAL_SCROLLBAR)) &&
1.1099 + layerItem->Frame()->GetParent() == scrollItem->GetScrollFrame()) {
1.1100 + return true;
1.1101 + }
1.1102 + }
1.1103 + return false;
1.1104 +}
1.1105 +
1.1106 +bool
1.1107 +nsDisplayList::ComputeVisibilityForSublist(nsDisplayListBuilder* aBuilder,
1.1108 + nsRegion* aVisibleRegion,
1.1109 + const nsRect& aListVisibleBounds,
1.1110 + const nsRect& aAllowVisibleRegionExpansion,
1.1111 + nsIFrame* aDisplayPortFrame) {
1.1112 +#ifdef DEBUG
1.1113 + nsRegion r;
1.1114 + r.And(*aVisibleRegion, GetBounds(aBuilder));
1.1115 + NS_ASSERTION(r.GetBounds().IsEqualInterior(aListVisibleBounds),
1.1116 + "bad aListVisibleBounds");
1.1117 +#endif
1.1118 +
1.1119 + mVisibleRect = aListVisibleBounds;
1.1120 + bool anyVisible = false;
1.1121 +
1.1122 + nsAutoTArray<nsDisplayItem*, 512> elements;
1.1123 + FlattenTo(&elements);
1.1124 +
1.1125 + bool forceTransparentSurface = false;
1.1126 +
1.1127 + for (int32_t i = elements.Length() - 1; i >= 0; --i) {
1.1128 + nsDisplayItem* item = elements[i];
1.1129 + nsDisplayItem* belowItem = i < 1 ? nullptr : elements[i - 1];
1.1130 +
1.1131 + nsDisplayList* list = item->GetSameCoordinateSystemChildren();
1.1132 + if (aBuilder->AllowMergingAndFlattening()) {
1.1133 + if (belowItem && item->TryMerge(aBuilder, belowItem)) {
1.1134 + belowItem->~nsDisplayItem();
1.1135 + elements.ReplaceElementsAt(i - 1, 1, item);
1.1136 + continue;
1.1137 + }
1.1138 +
1.1139 + // If an overlay scrollbar item is between a scroll layer item and the
1.1140 + // other scroll layer items that we need to merge with just move the
1.1141 + // scrollbar item up, that way it will be on top of the scrolled content
1.1142 + // and we can try to merge all the scroll layer items.
1.1143 + if (IsScrollLayerItemAndOverlayScrollbarForScrollFrame(item, belowItem)) {
1.1144 + elements[i] = belowItem;
1.1145 + elements[i-1] = item;
1.1146 + i++;
1.1147 + continue;
1.1148 + }
1.1149 +
1.1150 + if (list && item->ShouldFlattenAway(aBuilder)) {
1.1151 + // The elements on the list >= i no longer serve any use.
1.1152 + elements.SetLength(i);
1.1153 + list->FlattenTo(&elements);
1.1154 + i = elements.Length();
1.1155 + item->~nsDisplayItem();
1.1156 + continue;
1.1157 + }
1.1158 + }
1.1159 +
1.1160 + nsRect bounds = item->GetClippedBounds(aBuilder);
1.1161 +
1.1162 + nsRegion itemVisible;
1.1163 + itemVisible.And(*aVisibleRegion, bounds);
1.1164 + item->mVisibleRect = itemVisible.GetBounds();
1.1165 +
1.1166 + if (item->ComputeVisibility(aBuilder, aVisibleRegion,
1.1167 + aAllowVisibleRegionExpansion.Intersect(bounds))) {
1.1168 + anyVisible = true;
1.1169 +
1.1170 + // If we're in a displayport, we need to make sure that fixed position
1.1171 + // items do not subtract from the visible region, as async scrolling
1.1172 + // may expose these occluded areas.
1.1173 + // If the item is fixed pos in the same document as the displayport
1.1174 + // then don't let it occlude this list. The only other case possible
1.1175 + // is that the fixed pos content is in a child document, in which it
1.1176 + // would scroll with the rest of the content.
1.1177 + bool occlude = true;
1.1178 + if (aDisplayPortFrame && item->IsInFixedPos()) {
1.1179 + if (item->Frame()->PresContext() == aDisplayPortFrame->PresContext()) {
1.1180 + occlude = false;
1.1181 + }
1.1182 + }
1.1183 +
1.1184 + if (occlude) {
1.1185 + nsRegion opaque = TreatAsOpaque(item, aBuilder);
1.1186 + // Subtract opaque item from the visible region
1.1187 + aBuilder->SubtractFromVisibleRegion(aVisibleRegion, opaque);
1.1188 + }
1.1189 +
1.1190 + if (aBuilder->NeedToForceTransparentSurfaceForItem(item) ||
1.1191 + (list && list->NeedsTransparentSurface())) {
1.1192 + forceTransparentSurface = true;
1.1193 + }
1.1194 + }
1.1195 + AppendToBottom(item);
1.1196 + }
1.1197 +
1.1198 + mIsOpaque = !aVisibleRegion->Intersects(mVisibleRect);
1.1199 + mForceTransparentSurface = forceTransparentSurface;
1.1200 +#if defined(DEBUG) || defined(MOZ_DUMP_PAINTING)
1.1201 + mDidComputeVisibility = true;
1.1202 +#endif
1.1203 + return anyVisible;
1.1204 +}
1.1205 +
1.1206 +void nsDisplayList::PaintRoot(nsDisplayListBuilder* aBuilder,
1.1207 + nsRenderingContext* aCtx,
1.1208 + uint32_t aFlags) const {
1.1209 + PROFILER_LABEL("nsDisplayList", "PaintRoot");
1.1210 + PaintForFrame(aBuilder, aCtx, aBuilder->RootReferenceFrame(), aFlags);
1.1211 +}
1.1212 +
1.1213 +/**
1.1214 + * We paint by executing a layer manager transaction, constructing a
1.1215 + * single layer representing the display list, and then making it the
1.1216 + * root of the layer manager, drawing into the ThebesLayers.
1.1217 + */
1.1218 +void nsDisplayList::PaintForFrame(nsDisplayListBuilder* aBuilder,
1.1219 + nsRenderingContext* aCtx,
1.1220 + nsIFrame* aForFrame,
1.1221 + uint32_t aFlags) const {
1.1222 + NS_ASSERTION(mDidComputeVisibility,
1.1223 + "Must call ComputeVisibility before calling Paint");
1.1224 +
1.1225 + nsRefPtr<LayerManager> layerManager;
1.1226 + bool widgetTransaction = false;
1.1227 + bool allowRetaining = false;
1.1228 + bool doBeginTransaction = true;
1.1229 + nsView *view = nullptr;
1.1230 + if (aFlags & PAINT_USE_WIDGET_LAYERS) {
1.1231 + nsIFrame* rootReferenceFrame = aBuilder->RootReferenceFrame();
1.1232 + view = rootReferenceFrame->GetView();
1.1233 + NS_ASSERTION(rootReferenceFrame == nsLayoutUtils::GetDisplayRootFrame(rootReferenceFrame),
1.1234 + "Reference frame must be a display root for us to use the layer manager");
1.1235 + nsIWidget* window = rootReferenceFrame->GetNearestWidget();
1.1236 + if (window) {
1.1237 + layerManager = window->GetLayerManager(&allowRetaining);
1.1238 + if (layerManager) {
1.1239 + doBeginTransaction = !(aFlags & PAINT_EXISTING_TRANSACTION);
1.1240 + widgetTransaction = true;
1.1241 + }
1.1242 + }
1.1243 + }
1.1244 + if (!layerManager) {
1.1245 + if (!aCtx) {
1.1246 + NS_WARNING("Nowhere to paint into");
1.1247 + return;
1.1248 + }
1.1249 + layerManager = new BasicLayerManager();
1.1250 + }
1.1251 +
1.1252 + // Store the existing layer builder to reinstate it on return.
1.1253 + FrameLayerBuilder *oldBuilder = layerManager->GetLayerBuilder();
1.1254 +
1.1255 + FrameLayerBuilder *layerBuilder = new FrameLayerBuilder();
1.1256 + layerBuilder->Init(aBuilder, layerManager);
1.1257 +
1.1258 + if (aFlags & PAINT_COMPRESSED) {
1.1259 + layerBuilder->SetLayerTreeCompressionMode();
1.1260 + }
1.1261 +
1.1262 + if (aFlags & PAINT_FLUSH_LAYERS) {
1.1263 + FrameLayerBuilder::InvalidateAllLayers(layerManager);
1.1264 + }
1.1265 +
1.1266 + if (doBeginTransaction) {
1.1267 + if (aCtx) {
1.1268 + layerManager->BeginTransactionWithTarget(aCtx->ThebesContext());
1.1269 + } else {
1.1270 + layerManager->BeginTransaction();
1.1271 + }
1.1272 + }
1.1273 + if (widgetTransaction) {
1.1274 + layerBuilder->DidBeginRetainedLayerTransaction(layerManager);
1.1275 + }
1.1276 +
1.1277 + nsPresContext* presContext = aForFrame->PresContext();
1.1278 + nsIPresShell* presShell = presContext->GetPresShell();
1.1279 +
1.1280 + NotifySubDocInvalidationFunc computeInvalidFunc =
1.1281 + presContext->MayHavePaintEventListenerInSubDocument() ? nsPresContext::NotifySubDocInvalidation : 0;
1.1282 + bool computeInvalidRect = (computeInvalidFunc ||
1.1283 + (!layerManager->IsCompositingCheap() && layerManager->NeedsWidgetInvalidation())) &&
1.1284 + widgetTransaction;
1.1285 +
1.1286 + nsAutoPtr<LayerProperties> props(computeInvalidRect ?
1.1287 + LayerProperties::CloneFrom(layerManager->GetRoot()) :
1.1288 + nullptr);
1.1289 +
1.1290 + ContainerLayerParameters containerParameters
1.1291 + (presShell->GetXResolution(), presShell->GetYResolution());
1.1292 + nsRefPtr<ContainerLayer> root = layerBuilder->
1.1293 + BuildContainerLayerFor(aBuilder, layerManager, aForFrame, nullptr, *this,
1.1294 + containerParameters, nullptr);
1.1295 +
1.1296 + nsIDocument* document = nullptr;
1.1297 + if (presShell) {
1.1298 + document = presShell->GetDocument();
1.1299 + }
1.1300 +
1.1301 + if (widgetTransaction ||
1.1302 + // SVG-as-an-image docs don't paint as part of the retained layer tree,
1.1303 + // but they still need the invalidation state bits cleared in order for
1.1304 + // invalidation for CSS/SMIL animation to work properly.
1.1305 + (document && document->IsBeingUsedAsImage())) {
1.1306 + aForFrame->ClearInvalidationStateBits();
1.1307 + }
1.1308 +
1.1309 + if (!root) {
1.1310 + layerManager->SetUserData(&gLayerManagerLayerBuilder, oldBuilder);
1.1311 + return;
1.1312 + }
1.1313 + // Root is being scaled up by the X/Y resolution. Scale it back down.
1.1314 + root->SetPostScale(1.0f/containerParameters.mXScale,
1.1315 + 1.0f/containerParameters.mYScale);
1.1316 +
1.1317 + ViewID id = FrameMetrics::NULL_SCROLL_ID;
1.1318 + bool isRoot = presContext->IsRootContentDocument();
1.1319 +
1.1320 + nsIFrame* rootScrollFrame = presShell->GetRootScrollFrame();
1.1321 + nsRect displayport, criticalDisplayport;
1.1322 + bool usingDisplayport = false;
1.1323 + bool usingCriticalDisplayport = false;
1.1324 + if (rootScrollFrame) {
1.1325 + nsIContent* content = rootScrollFrame->GetContent();
1.1326 + if (content) {
1.1327 + usingDisplayport = nsLayoutUtils::GetDisplayPort(content, &displayport);
1.1328 + usingCriticalDisplayport =
1.1329 + nsLayoutUtils::GetCriticalDisplayPort(content, &criticalDisplayport);
1.1330 +
1.1331 + // If this is the root content document, we want it to have a scroll id.
1.1332 + if (isRoot) {
1.1333 + id = nsLayoutUtils::FindOrCreateIDFor(content);
1.1334 + }
1.1335 + }
1.1336 + }
1.1337 +
1.1338 + nsRect viewport(aBuilder->ToReferenceFrame(aForFrame), aForFrame->GetSize());
1.1339 +
1.1340 + RecordFrameMetrics(aForFrame, rootScrollFrame,
1.1341 + aBuilder->FindReferenceFrameFor(aForFrame),
1.1342 + root, mVisibleRect, viewport,
1.1343 + (usingDisplayport ? &displayport : nullptr),
1.1344 + (usingCriticalDisplayport ? &criticalDisplayport : nullptr),
1.1345 + id, isRoot, containerParameters);
1.1346 + if (usingDisplayport &&
1.1347 + !(root->GetContentFlags() & Layer::CONTENT_OPAQUE)) {
1.1348 + // See bug 693938, attachment 567017
1.1349 + NS_WARNING("Transparent content with displayports can be expensive.");
1.1350 + }
1.1351 +
1.1352 + layerManager->SetRoot(root);
1.1353 + layerBuilder->WillEndTransaction();
1.1354 + bool temp = aBuilder->SetIsCompositingCheap(layerManager->IsCompositingCheap());
1.1355 + LayerManager::EndTransactionFlags flags = LayerManager::END_DEFAULT;
1.1356 + if (layerManager->NeedsWidgetInvalidation()) {
1.1357 + if (aFlags & PAINT_NO_COMPOSITE) {
1.1358 + flags = LayerManager::END_NO_COMPOSITE;
1.1359 + }
1.1360 + } else {
1.1361 + // Client layer managers never composite directly, so
1.1362 + // we don't need to worry about END_NO_COMPOSITE.
1.1363 + if (aBuilder->WillComputePluginGeometry()) {
1.1364 + flags = LayerManager::END_NO_REMOTE_COMPOSITE;
1.1365 + }
1.1366 + }
1.1367 +
1.1368 + layerManager->EndTransaction(FrameLayerBuilder::DrawThebesLayer,
1.1369 + aBuilder, flags);
1.1370 + aBuilder->SetIsCompositingCheap(temp);
1.1371 + layerBuilder->DidEndTransaction();
1.1372 +
1.1373 + nsIntRegion invalid;
1.1374 + if (props) {
1.1375 + invalid = props->ComputeDifferences(root, computeInvalidFunc);
1.1376 + } else if (widgetTransaction) {
1.1377 + LayerProperties::ClearInvalidations(root);
1.1378 + }
1.1379 +
1.1380 + bool shouldInvalidate = layerManager->NeedsWidgetInvalidation();
1.1381 + if (view) {
1.1382 + if (props) {
1.1383 + if (!invalid.IsEmpty()) {
1.1384 + nsIntRect bounds = invalid.GetBounds();
1.1385 + nsRect rect(presContext->DevPixelsToAppUnits(bounds.x),
1.1386 + presContext->DevPixelsToAppUnits(bounds.y),
1.1387 + presContext->DevPixelsToAppUnits(bounds.width),
1.1388 + presContext->DevPixelsToAppUnits(bounds.height));
1.1389 + if (shouldInvalidate) {
1.1390 + view->GetViewManager()->InvalidateViewNoSuppression(view, rect);
1.1391 + }
1.1392 + presContext->NotifyInvalidation(bounds, 0);
1.1393 + }
1.1394 + } else if (shouldInvalidate) {
1.1395 + view->GetViewManager()->InvalidateView(view);
1.1396 + }
1.1397 + }
1.1398 +
1.1399 + if (aFlags & PAINT_FLUSH_LAYERS) {
1.1400 + FrameLayerBuilder::InvalidateAllLayers(layerManager);
1.1401 + }
1.1402 +
1.1403 + layerManager->SetUserData(&gLayerManagerLayerBuilder, oldBuilder);
1.1404 +}
1.1405 +
1.1406 +uint32_t nsDisplayList::Count() const {
1.1407 + uint32_t count = 0;
1.1408 + for (nsDisplayItem* i = GetBottom(); i; i = i->GetAbove()) {
1.1409 + ++count;
1.1410 + }
1.1411 + return count;
1.1412 +}
1.1413 +
1.1414 +nsDisplayItem* nsDisplayList::RemoveBottom() {
1.1415 + nsDisplayItem* item = mSentinel.mAbove;
1.1416 + if (!item)
1.1417 + return nullptr;
1.1418 + mSentinel.mAbove = item->mAbove;
1.1419 + if (item == mTop) {
1.1420 + // must have been the only item
1.1421 + mTop = &mSentinel;
1.1422 + }
1.1423 + item->mAbove = nullptr;
1.1424 + return item;
1.1425 +}
1.1426 +
1.1427 +void nsDisplayList::DeleteAll() {
1.1428 + nsDisplayItem* item;
1.1429 + while ((item = RemoveBottom()) != nullptr) {
1.1430 + item->~nsDisplayItem();
1.1431 + }
1.1432 +}
1.1433 +
1.1434 +static bool
1.1435 +GetMouseThrough(const nsIFrame* aFrame)
1.1436 +{
1.1437 + if (!aFrame->IsBoxFrame())
1.1438 + return false;
1.1439 +
1.1440 + const nsIFrame* frame = aFrame;
1.1441 + while (frame) {
1.1442 + if (frame->GetStateBits() & NS_FRAME_MOUSE_THROUGH_ALWAYS) {
1.1443 + return true;
1.1444 + } else if (frame->GetStateBits() & NS_FRAME_MOUSE_THROUGH_NEVER) {
1.1445 + return false;
1.1446 + }
1.1447 + frame = frame->GetParentBox();
1.1448 + }
1.1449 + return false;
1.1450 +}
1.1451 +
1.1452 +static bool
1.1453 +IsFrameReceivingPointerEvents(nsIFrame* aFrame)
1.1454 +{
1.1455 + nsSubDocumentFrame* frame = do_QueryFrame(aFrame);
1.1456 + if (frame && frame->PassPointerEventsToChildren()) {
1.1457 + return true;
1.1458 + }
1.1459 + return NS_STYLE_POINTER_EVENTS_NONE !=
1.1460 + aFrame->StyleVisibility()->GetEffectivePointerEvents(aFrame);
1.1461 +}
1.1462 +
1.1463 +// A list of frames, and their z depth. Used for sorting
1.1464 +// the results of hit testing.
1.1465 +struct FramesWithDepth
1.1466 +{
1.1467 + FramesWithDepth(float aDepth) :
1.1468 + mDepth(aDepth)
1.1469 + {}
1.1470 +
1.1471 + bool operator<(const FramesWithDepth& aOther) const {
1.1472 + if (mDepth != aOther.mDepth) {
1.1473 + // We want to sort so that the shallowest item (highest depth value) is first
1.1474 + return mDepth > aOther.mDepth;
1.1475 + }
1.1476 + return this < &aOther;
1.1477 + }
1.1478 + bool operator==(const FramesWithDepth& aOther) const {
1.1479 + return this == &aOther;
1.1480 + }
1.1481 +
1.1482 + float mDepth;
1.1483 + nsTArray<nsIFrame*> mFrames;
1.1484 +};
1.1485 +
1.1486 +// Sort the frames by depth and then moves all the contained frames to the destination
1.1487 +void FlushFramesArray(nsTArray<FramesWithDepth>& aSource, nsTArray<nsIFrame*>* aDest)
1.1488 +{
1.1489 + if (aSource.IsEmpty()) {
1.1490 + return;
1.1491 + }
1.1492 + aSource.Sort();
1.1493 + uint32_t length = aSource.Length();
1.1494 + for (uint32_t i = 0; i < length; i++) {
1.1495 + aDest->MoveElementsFrom(aSource[i].mFrames);
1.1496 + }
1.1497 + aSource.Clear();
1.1498 +}
1.1499 +
1.1500 +void nsDisplayList::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
1.1501 + nsDisplayItem::HitTestState* aState,
1.1502 + nsTArray<nsIFrame*> *aOutFrames) const {
1.1503 + int32_t itemBufferStart = aState->mItemBuffer.Length();
1.1504 + nsDisplayItem* item;
1.1505 + for (item = GetBottom(); item; item = item->GetAbove()) {
1.1506 + aState->mItemBuffer.AppendElement(item);
1.1507 + }
1.1508 + nsAutoTArray<FramesWithDepth, 16> temp;
1.1509 + for (int32_t i = aState->mItemBuffer.Length() - 1; i >= itemBufferStart; --i) {
1.1510 + // Pop element off the end of the buffer. We want to shorten the buffer
1.1511 + // so that recursive calls to HitTest have more buffer space.
1.1512 + item = aState->mItemBuffer[i];
1.1513 + aState->mItemBuffer.SetLength(i);
1.1514 +
1.1515 + bool snap;
1.1516 + nsRect r = item->GetBounds(aBuilder, &snap).Intersect(aRect);
1.1517 + if (item->GetClip().MayIntersect(r)) {
1.1518 + nsAutoTArray<nsIFrame*, 16> outFrames;
1.1519 + item->HitTest(aBuilder, aRect, aState, &outFrames);
1.1520 +
1.1521 + // For 3d transforms with preserve-3d we add hit frames into the temp list
1.1522 + // so we can sort them later, otherwise we add them directly to the output list.
1.1523 + nsTArray<nsIFrame*> *writeFrames = aOutFrames;
1.1524 + if (item->GetType() == nsDisplayItem::TYPE_TRANSFORM &&
1.1525 + item->Frame()->Preserves3D()) {
1.1526 + if (outFrames.Length()) {
1.1527 + nsDisplayTransform *transform = static_cast<nsDisplayTransform*>(item);
1.1528 + nsPoint point = aRect.TopLeft();
1.1529 + // A 1x1 rect means a point, otherwise use the center of the rect
1.1530 + if (aRect.width != 1 || aRect.height != 1) {
1.1531 + point = aRect.Center();
1.1532 + }
1.1533 + temp.AppendElement(FramesWithDepth(transform->GetHitDepthAtPoint(aBuilder, point)));
1.1534 + writeFrames = &temp[temp.Length() - 1].mFrames;
1.1535 + }
1.1536 + } else {
1.1537 + // We may have just finished a run of consecutive preserve-3d transforms,
1.1538 + // so flush these into the destination array before processing our frame list.
1.1539 + FlushFramesArray(temp, aOutFrames);
1.1540 + }
1.1541 +
1.1542 + for (uint32_t j = 0; j < outFrames.Length(); j++) {
1.1543 + nsIFrame *f = outFrames.ElementAt(j);
1.1544 + // Handle the XUL 'mousethrough' feature and 'pointer-events'.
1.1545 + if (!GetMouseThrough(f) && IsFrameReceivingPointerEvents(f)) {
1.1546 + writeFrames->AppendElement(f);
1.1547 + }
1.1548 + }
1.1549 + }
1.1550 + }
1.1551 + // Clear any remaining preserve-3d transforms.
1.1552 + FlushFramesArray(temp, aOutFrames);
1.1553 + NS_ASSERTION(aState->mItemBuffer.Length() == uint32_t(itemBufferStart),
1.1554 + "How did we forget to pop some elements?");
1.1555 +}
1.1556 +
1.1557 +static void Sort(nsDisplayList* aList, int32_t aCount, nsDisplayList::SortLEQ aCmp,
1.1558 + void* aClosure) {
1.1559 + if (aCount < 2)
1.1560 + return;
1.1561 +
1.1562 + nsDisplayList list1;
1.1563 + nsDisplayList list2;
1.1564 + int i;
1.1565 + int32_t half = aCount/2;
1.1566 + bool sorted = true;
1.1567 + nsDisplayItem* prev = nullptr;
1.1568 + for (i = 0; i < aCount; ++i) {
1.1569 + nsDisplayItem* item = aList->RemoveBottom();
1.1570 + (i < half ? &list1 : &list2)->AppendToTop(item);
1.1571 + if (sorted && prev && !aCmp(prev, item, aClosure)) {
1.1572 + sorted = false;
1.1573 + }
1.1574 + prev = item;
1.1575 + }
1.1576 + if (sorted) {
1.1577 + aList->AppendToTop(&list1);
1.1578 + aList->AppendToTop(&list2);
1.1579 + return;
1.1580 + }
1.1581 +
1.1582 + Sort(&list1, half, aCmp, aClosure);
1.1583 + Sort(&list2, aCount - half, aCmp, aClosure);
1.1584 +
1.1585 + for (i = 0; i < aCount; ++i) {
1.1586 + if (list1.GetBottom() &&
1.1587 + (!list2.GetBottom() ||
1.1588 + aCmp(list1.GetBottom(), list2.GetBottom(), aClosure))) {
1.1589 + aList->AppendToTop(list1.RemoveBottom());
1.1590 + } else {
1.1591 + aList->AppendToTop(list2.RemoveBottom());
1.1592 + }
1.1593 + }
1.1594 +}
1.1595 +
1.1596 +static nsIContent* FindContentInDocument(nsDisplayItem* aItem, nsIDocument* aDoc) {
1.1597 + nsIFrame* f = aItem->Frame();
1.1598 + while (f) {
1.1599 + nsPresContext* pc = f->PresContext();
1.1600 + if (pc->Document() == aDoc) {
1.1601 + return f->GetContent();
1.1602 + }
1.1603 + f = nsLayoutUtils::GetCrossDocParentFrame(pc->PresShell()->GetRootFrame());
1.1604 + }
1.1605 + return nullptr;
1.1606 +}
1.1607 +
1.1608 +static bool IsContentLEQ(nsDisplayItem* aItem1, nsDisplayItem* aItem2,
1.1609 + void* aClosure) {
1.1610 + nsIContent* commonAncestor = static_cast<nsIContent*>(aClosure);
1.1611 + // It's possible that the nsIContent for aItem1 or aItem2 is in a subdocument
1.1612 + // of commonAncestor, because display items for subdocuments have been
1.1613 + // mixed into the same list. Ensure that we're looking at content
1.1614 + // in commonAncestor's document.
1.1615 + nsIDocument* commonAncestorDoc = commonAncestor->OwnerDoc();
1.1616 + nsIContent* content1 = FindContentInDocument(aItem1, commonAncestorDoc);
1.1617 + nsIContent* content2 = FindContentInDocument(aItem2, commonAncestorDoc);
1.1618 + if (!content1 || !content2) {
1.1619 + NS_ERROR("Document trees are mixed up!");
1.1620 + // Something weird going on
1.1621 + return true;
1.1622 + }
1.1623 + return nsLayoutUtils::CompareTreePosition(content1, content2, commonAncestor) <= 0;
1.1624 +}
1.1625 +
1.1626 +static bool IsZOrderLEQ(nsDisplayItem* aItem1, nsDisplayItem* aItem2,
1.1627 + void* aClosure) {
1.1628 + // Note that we can't just take the difference of the two
1.1629 + // z-indices here, because that might overflow a 32-bit int.
1.1630 + return aItem1->ZIndex() <= aItem2->ZIndex();
1.1631 +}
1.1632 +
1.1633 +void nsDisplayList::SortByZOrder(nsDisplayListBuilder* aBuilder,
1.1634 + nsIContent* aCommonAncestor) {
1.1635 + Sort(aBuilder, IsZOrderLEQ, aCommonAncestor);
1.1636 +}
1.1637 +
1.1638 +void nsDisplayList::SortByContentOrder(nsDisplayListBuilder* aBuilder,
1.1639 + nsIContent* aCommonAncestor) {
1.1640 + Sort(aBuilder, IsContentLEQ, aCommonAncestor);
1.1641 +}
1.1642 +
1.1643 +void nsDisplayList::Sort(nsDisplayListBuilder* aBuilder,
1.1644 + SortLEQ aCmp, void* aClosure) {
1.1645 + ::Sort(this, Count(), aCmp, aClosure);
1.1646 +}
1.1647 +
1.1648 +void
1.1649 +nsDisplayItem::AddInvalidRegionForSyncDecodeBackgroundImages(
1.1650 + nsDisplayListBuilder* aBuilder,
1.1651 + const nsDisplayItemGeometry* aGeometry,
1.1652 + nsRegion* aInvalidRegion)
1.1653 +{
1.1654 + if (aBuilder->ShouldSyncDecodeImages()) {
1.1655 + if (!nsCSSRendering::AreAllBackgroundImagesDecodedForFrame(mFrame)) {
1.1656 + bool snap;
1.1657 + aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap));
1.1658 + }
1.1659 + }
1.1660 +}
1.1661 +
1.1662 +/* static */ bool
1.1663 +nsDisplayItem::ForceActiveLayers()
1.1664 +{
1.1665 + static bool sForce = false;
1.1666 + static bool sForceCached = false;
1.1667 +
1.1668 + if (!sForceCached) {
1.1669 + Preferences::AddBoolVarCache(&sForce, "layers.force-active", false);
1.1670 + sForceCached = true;
1.1671 + }
1.1672 +
1.1673 + return sForce;
1.1674 +}
1.1675 +
1.1676 +/* static */ int32_t
1.1677 +nsDisplayItem::MaxActiveLayers()
1.1678 +{
1.1679 + static int32_t sMaxLayers = false;
1.1680 + static bool sMaxLayersCached = false;
1.1681 +
1.1682 + if (!sMaxLayersCached) {
1.1683 + Preferences::AddIntVarCache(&sMaxLayers, "layers.max-active", -1);
1.1684 + sMaxLayersCached = true;
1.1685 + }
1.1686 +
1.1687 + return sMaxLayers;
1.1688 +}
1.1689 +
1.1690 +int32_t
1.1691 +nsDisplayItem::ZIndex() const
1.1692 +{
1.1693 + if (!mFrame->IsPositioned() && !mFrame->IsFlexItem())
1.1694 + return 0;
1.1695 +
1.1696 + const nsStylePosition* position = mFrame->StylePosition();
1.1697 + if (position->mZIndex.GetUnit() == eStyleUnit_Integer)
1.1698 + return position->mZIndex.GetIntValue();
1.1699 +
1.1700 + // sort the auto and 0 elements together
1.1701 + return 0;
1.1702 +}
1.1703 +
1.1704 +bool
1.1705 +nsDisplayItem::RecomputeVisibility(nsDisplayListBuilder* aBuilder,
1.1706 + nsRegion* aVisibleRegion) {
1.1707 + nsRect bounds = GetClippedBounds(aBuilder);
1.1708 +
1.1709 + nsRegion itemVisible;
1.1710 + itemVisible.And(*aVisibleRegion, bounds);
1.1711 + mVisibleRect = itemVisible.GetBounds();
1.1712 +
1.1713 + // When we recompute visibility within layers we don't need to
1.1714 + // expand the visible region for content behind plugins (the plugin
1.1715 + // is not in the layer).
1.1716 + if (!ComputeVisibility(aBuilder, aVisibleRegion, nsRect()))
1.1717 + return false;
1.1718 +
1.1719 + nsRegion opaque = TreatAsOpaque(this, aBuilder);
1.1720 + aBuilder->SubtractFromVisibleRegion(aVisibleRegion, opaque);
1.1721 + return true;
1.1722 +}
1.1723 +
1.1724 +nsRect
1.1725 +nsDisplayItem::GetClippedBounds(nsDisplayListBuilder* aBuilder)
1.1726 +{
1.1727 + bool snap;
1.1728 + nsRect r = GetBounds(aBuilder, &snap);
1.1729 + return GetClip().ApplyNonRoundedIntersection(r);
1.1730 +}
1.1731 +
1.1732 +nsRect
1.1733 +nsDisplaySolidColor::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap)
1.1734 +{
1.1735 + *aSnap = true;
1.1736 + return mBounds;
1.1737 +}
1.1738 +
1.1739 +void
1.1740 +nsDisplaySolidColor::Paint(nsDisplayListBuilder* aBuilder,
1.1741 + nsRenderingContext* aCtx)
1.1742 +{
1.1743 + aCtx->SetColor(mColor);
1.1744 + aCtx->FillRect(mVisibleRect);
1.1745 +}
1.1746 +
1.1747 +#ifdef MOZ_DUMP_PAINTING
1.1748 +void
1.1749 +nsDisplaySolidColor::WriteDebugInfo(nsACString& aTo)
1.1750 +{
1.1751 + aTo += nsPrintfCString(" (rgba %d,%d,%d,%d)",
1.1752 + NS_GET_R(mColor), NS_GET_G(mColor),
1.1753 + NS_GET_B(mColor), NS_GET_A(mColor));
1.1754 +}
1.1755 +#endif
1.1756 +
1.1757 +static void
1.1758 +RegisterThemeGeometry(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame)
1.1759 +{
1.1760 + nsIFrame* displayRoot = nsLayoutUtils::GetDisplayRootFrame(aFrame);
1.1761 +
1.1762 + for (nsIFrame* f = aFrame; f; f = f->GetParent()) {
1.1763 + // Bail out if we're in a transformed subtree
1.1764 + if (f->IsTransformed())
1.1765 + return;
1.1766 + // Bail out if we're not in the displayRoot's document
1.1767 + if (!f->GetParent() && f != displayRoot)
1.1768 + return;
1.1769 + }
1.1770 +
1.1771 + nsRect borderBox(aFrame->GetOffsetTo(displayRoot), aFrame->GetSize());
1.1772 + aBuilder->RegisterThemeGeometry(aFrame->StyleDisplay()->mAppearance,
1.1773 + borderBox.ToNearestPixels(aFrame->PresContext()->AppUnitsPerDevPixel()));
1.1774 +}
1.1775 +
1.1776 +nsDisplayBackgroundImage::nsDisplayBackgroundImage(nsDisplayListBuilder* aBuilder,
1.1777 + nsIFrame* aFrame,
1.1778 + uint32_t aLayer,
1.1779 + const nsStyleBackground* aBackgroundStyle)
1.1780 + : nsDisplayImageContainer(aBuilder, aFrame)
1.1781 + , mBackgroundStyle(aBackgroundStyle)
1.1782 + , mLayer(aLayer)
1.1783 +{
1.1784 + MOZ_COUNT_CTOR(nsDisplayBackgroundImage);
1.1785 +
1.1786 + mBounds = GetBoundsInternal(aBuilder);
1.1787 +}
1.1788 +
1.1789 +nsDisplayBackgroundImage::~nsDisplayBackgroundImage()
1.1790 +{
1.1791 +#ifdef NS_BUILD_REFCNT_LOGGING
1.1792 + MOZ_COUNT_DTOR(nsDisplayBackgroundImage);
1.1793 +#endif
1.1794 +}
1.1795 +
1.1796 +static nsStyleContext* GetBackgroundStyleContext(nsIFrame* aFrame)
1.1797 +{
1.1798 + nsStyleContext *sc;
1.1799 + if (!nsCSSRendering::FindBackground(aFrame, &sc)) {
1.1800 + // We don't want to bail out if moz-appearance is set on a root
1.1801 + // node. If it has a parent content node, bail because it's not
1.1802 + // a root, other wise keep going in order to let the theme stuff
1.1803 + // draw the background. The canvas really should be drawing the
1.1804 + // bg, but there's no way to hook that up via css.
1.1805 + if (!aFrame->StyleDisplay()->mAppearance) {
1.1806 + return nullptr;
1.1807 + }
1.1808 +
1.1809 + nsIContent* content = aFrame->GetContent();
1.1810 + if (!content || content->GetParent()) {
1.1811 + return nullptr;
1.1812 + }
1.1813 +
1.1814 + sc = aFrame->StyleContext();
1.1815 + }
1.1816 + return sc;
1.1817 +}
1.1818 +
1.1819 +/*static*/ bool
1.1820 +nsDisplayBackgroundImage::AppendBackgroundItemsToTop(nsDisplayListBuilder* aBuilder,
1.1821 + nsIFrame* aFrame,
1.1822 + nsDisplayList* aList)
1.1823 +{
1.1824 + nsStyleContext* bgSC = nullptr;
1.1825 + const nsStyleBackground* bg = nullptr;
1.1826 + nsPresContext* presContext = aFrame->PresContext();
1.1827 + bool isThemed = aFrame->IsThemed();
1.1828 + if (!isThemed) {
1.1829 + bgSC = GetBackgroundStyleContext(aFrame);
1.1830 + if (bgSC) {
1.1831 + bg = bgSC->StyleBackground();
1.1832 + }
1.1833 + }
1.1834 +
1.1835 + bool drawBackgroundColor = false;
1.1836 + nscolor color;
1.1837 + if (!nsCSSRendering::IsCanvasFrame(aFrame) && bg) {
1.1838 + bool drawBackgroundImage;
1.1839 + color =
1.1840 + nsCSSRendering::DetermineBackgroundColor(presContext, bgSC, aFrame,
1.1841 + drawBackgroundImage, drawBackgroundColor);
1.1842 + }
1.1843 +
1.1844 + // An auxiliary list is necessary in case we have background blending; if that
1.1845 + // is the case, background items need to be wrapped by a blend container to
1.1846 + // isolate blending to the background
1.1847 + nsDisplayList bgItemList;
1.1848 + // Even if we don't actually have a background color to paint, we may still need
1.1849 + // to create an item for hit testing.
1.1850 + if ((drawBackgroundColor && color != NS_RGBA(0,0,0,0)) ||
1.1851 + aBuilder->IsForEventDelivery()) {
1.1852 + bgItemList.AppendNewToTop(
1.1853 + new (aBuilder) nsDisplayBackgroundColor(aBuilder, aFrame, bg,
1.1854 + drawBackgroundColor ? color : NS_RGBA(0, 0, 0, 0)));
1.1855 + }
1.1856 +
1.1857 + if (isThemed) {
1.1858 + nsDisplayThemedBackground* bgItem =
1.1859 + new (aBuilder) nsDisplayThemedBackground(aBuilder, aFrame);
1.1860 + bgItemList.AppendNewToTop(bgItem);
1.1861 + aList->AppendToTop(&bgItemList);
1.1862 + return true;
1.1863 + }
1.1864 +
1.1865 + if (!bg) {
1.1866 + aList->AppendToTop(&bgItemList);
1.1867 + return false;
1.1868 + }
1.1869 +
1.1870 + bool needBlendContainer = false;
1.1871 +
1.1872 + // Passing bg == nullptr in this macro will result in one iteration with
1.1873 + // i = 0.
1.1874 + NS_FOR_VISIBLE_BACKGROUND_LAYERS_BACK_TO_FRONT(i, bg) {
1.1875 + if (bg->mLayers[i].mImage.IsEmpty()) {
1.1876 + continue;
1.1877 + }
1.1878 +
1.1879 + if (bg->mLayers[i].mBlendMode != NS_STYLE_BLEND_NORMAL) {
1.1880 + needBlendContainer = true;
1.1881 + }
1.1882 +
1.1883 + nsDisplayBackgroundImage* bgItem =
1.1884 + new (aBuilder) nsDisplayBackgroundImage(aBuilder, aFrame, i, bg);
1.1885 + bgItemList.AppendNewToTop(bgItem);
1.1886 + }
1.1887 +
1.1888 + if (needBlendContainer) {
1.1889 + bgItemList.AppendNewToTop(
1.1890 + new (aBuilder) nsDisplayBlendContainer(aBuilder, aFrame, &bgItemList));
1.1891 + }
1.1892 +
1.1893 + aList->AppendToTop(&bgItemList);
1.1894 + return false;
1.1895 +}
1.1896 +
1.1897 +// Check that the rounded border of aFrame, added to aToReferenceFrame,
1.1898 +// intersects aRect. Assumes that the unrounded border has already
1.1899 +// been checked for intersection.
1.1900 +static bool
1.1901 +RoundedBorderIntersectsRect(nsIFrame* aFrame,
1.1902 + const nsPoint& aFrameToReferenceFrame,
1.1903 + const nsRect& aTestRect)
1.1904 +{
1.1905 + if (!nsRect(aFrameToReferenceFrame, aFrame->GetSize()).Intersects(aTestRect))
1.1906 + return false;
1.1907 +
1.1908 + nscoord radii[8];
1.1909 + return !aFrame->GetBorderRadii(radii) ||
1.1910 + nsLayoutUtils::RoundedRectIntersectsRect(nsRect(aFrameToReferenceFrame,
1.1911 + aFrame->GetSize()),
1.1912 + radii, aTestRect);
1.1913 +}
1.1914 +
1.1915 +// Returns TRUE if aContainedRect is guaranteed to be contained in
1.1916 +// the rounded rect defined by aRoundedRect and aRadii. Complex cases are
1.1917 +// handled conservatively by returning FALSE in some situations where
1.1918 +// a more thorough analysis could return TRUE.
1.1919 +//
1.1920 +// See also RoundedRectIntersectsRect.
1.1921 +static bool RoundedRectContainsRect(const nsRect& aRoundedRect,
1.1922 + const nscoord aRadii[8],
1.1923 + const nsRect& aContainedRect) {
1.1924 + nsRegion rgn = nsLayoutUtils::RoundedRectIntersectRect(aRoundedRect, aRadii, aContainedRect);
1.1925 + return rgn.Contains(aContainedRect);
1.1926 +}
1.1927 +
1.1928 +bool
1.1929 +nsDisplayBackgroundImage::IsSingleFixedPositionImage(nsDisplayListBuilder* aBuilder,
1.1930 + const nsRect& aClipRect,
1.1931 + gfxRect* aDestRect)
1.1932 +{
1.1933 + if (!mBackgroundStyle)
1.1934 + return false;
1.1935 +
1.1936 + if (mBackgroundStyle->mLayers.Length() != 1)
1.1937 + return false;
1.1938 +
1.1939 + nsPresContext* presContext = mFrame->PresContext();
1.1940 + uint32_t flags = aBuilder->GetBackgroundPaintFlags();
1.1941 + nsRect borderArea = nsRect(ToReferenceFrame(), mFrame->GetSize());
1.1942 + const nsStyleBackground::Layer &layer = mBackgroundStyle->mLayers[mLayer];
1.1943 +
1.1944 + if (layer.mAttachment != NS_STYLE_BG_ATTACHMENT_FIXED)
1.1945 + return false;
1.1946 +
1.1947 + nsBackgroundLayerState state =
1.1948 + nsCSSRendering::PrepareBackgroundLayer(presContext,
1.1949 + mFrame,
1.1950 + flags,
1.1951 + borderArea,
1.1952 + aClipRect,
1.1953 + *mBackgroundStyle,
1.1954 + layer);
1.1955 +
1.1956 + nsImageRenderer* imageRenderer = &state.mImageRenderer;
1.1957 + // We only care about images here, not gradients.
1.1958 + if (!imageRenderer->IsRasterImage())
1.1959 + return false;
1.1960 +
1.1961 + int32_t appUnitsPerDevPixel = presContext->AppUnitsPerDevPixel();
1.1962 + *aDestRect = nsLayoutUtils::RectToGfxRect(state.mFillArea, appUnitsPerDevPixel);
1.1963 +
1.1964 + return true;
1.1965 +}
1.1966 +
1.1967 +bool
1.1968 +nsDisplayBackgroundImage::TryOptimizeToImageLayer(LayerManager* aManager,
1.1969 + nsDisplayListBuilder* aBuilder)
1.1970 +{
1.1971 + if (!mBackgroundStyle)
1.1972 + return false;
1.1973 +
1.1974 + nsPresContext* presContext = mFrame->PresContext();
1.1975 + uint32_t flags = aBuilder->GetBackgroundPaintFlags();
1.1976 + nsRect borderArea = nsRect(ToReferenceFrame(), mFrame->GetSize());
1.1977 + const nsStyleBackground::Layer &layer = mBackgroundStyle->mLayers[mLayer];
1.1978 +
1.1979 + if (layer.mClip != NS_STYLE_BG_CLIP_BORDER) {
1.1980 + return false;
1.1981 + }
1.1982 + nscoord radii[8];
1.1983 + if (mFrame->GetBorderRadii(radii)) {
1.1984 + return false;
1.1985 + }
1.1986 +
1.1987 + nsBackgroundLayerState state =
1.1988 + nsCSSRendering::PrepareBackgroundLayer(presContext,
1.1989 + mFrame,
1.1990 + flags,
1.1991 + borderArea,
1.1992 + borderArea,
1.1993 + *mBackgroundStyle,
1.1994 + layer);
1.1995 +
1.1996 + nsImageRenderer* imageRenderer = &state.mImageRenderer;
1.1997 + // We only care about images here, not gradients.
1.1998 + if (!imageRenderer->IsRasterImage())
1.1999 + return false;
1.2000 +
1.2001 + nsRefPtr<ImageContainer> imageContainer = imageRenderer->GetContainer(aManager);
1.2002 + // Image is not ready to be made into a layer yet
1.2003 + if (!imageContainer)
1.2004 + return false;
1.2005 +
1.2006 + // We currently can't handle tiled or partial backgrounds.
1.2007 + if (!state.mDestArea.IsEqualEdges(state.mFillArea)) {
1.2008 + return false;
1.2009 + }
1.2010 +
1.2011 + // XXX Ignoring state.mAnchor. ImageLayer drawing snaps mDestArea edges to
1.2012 + // layer pixel boundaries. This should be OK for now.
1.2013 +
1.2014 + int32_t appUnitsPerDevPixel = presContext->AppUnitsPerDevPixel();
1.2015 + mDestRect = nsLayoutUtils::RectToGfxRect(state.mDestArea, appUnitsPerDevPixel);
1.2016 + mImageContainer = imageContainer;
1.2017 +
1.2018 + // Ok, we can turn this into a layer if needed.
1.2019 + return true;
1.2020 +}
1.2021 +
1.2022 +already_AddRefed<ImageContainer>
1.2023 +nsDisplayBackgroundImage::GetContainer(LayerManager* aManager,
1.2024 + nsDisplayListBuilder *aBuilder)
1.2025 +{
1.2026 + if (!TryOptimizeToImageLayer(aManager, aBuilder)) {
1.2027 + return nullptr;
1.2028 + }
1.2029 +
1.2030 + nsRefPtr<ImageContainer> container = mImageContainer;
1.2031 +
1.2032 + return container.forget();
1.2033 +}
1.2034 +
1.2035 +LayerState
1.2036 +nsDisplayBackgroundImage::GetLayerState(nsDisplayListBuilder* aBuilder,
1.2037 + LayerManager* aManager,
1.2038 + const ContainerLayerParameters& aParameters)
1.2039 +{
1.2040 + bool animated = false;
1.2041 + if (mBackgroundStyle) {
1.2042 + const nsStyleBackground::Layer &layer = mBackgroundStyle->mLayers[mLayer];
1.2043 + const nsStyleImage* image = &layer.mImage;
1.2044 + if (image->GetType() == eStyleImageType_Image) {
1.2045 + imgIRequest* imgreq = image->GetImageData();
1.2046 + nsCOMPtr<imgIContainer> image;
1.2047 + if (NS_SUCCEEDED(imgreq->GetImage(getter_AddRefs(image))) && image) {
1.2048 + if (NS_FAILED(image->GetAnimated(&animated))) {
1.2049 + animated = false;
1.2050 + }
1.2051 + }
1.2052 + }
1.2053 + }
1.2054 +
1.2055 + if (!animated ||
1.2056 + !nsLayoutUtils::AnimatedImageLayersEnabled()) {
1.2057 + if (!aManager->IsCompositingCheap() ||
1.2058 + !nsLayoutUtils::GPUImageScalingEnabled()) {
1.2059 + return LAYER_NONE;
1.2060 + }
1.2061 + }
1.2062 +
1.2063 + if (!TryOptimizeToImageLayer(aManager, aBuilder)) {
1.2064 + return LAYER_NONE;
1.2065 + }
1.2066 +
1.2067 + if (!animated) {
1.2068 + mozilla::gfx::IntSize imageSize = mImageContainer->GetCurrentSize();
1.2069 + NS_ASSERTION(imageSize.width != 0 && imageSize.height != 0, "Invalid image size!");
1.2070 +
1.2071 + gfxRect destRect = mDestRect;
1.2072 +
1.2073 + destRect.width *= aParameters.mXScale;
1.2074 + destRect.height *= aParameters.mYScale;
1.2075 +
1.2076 + // Calculate the scaling factor for the frame.
1.2077 + gfxSize scale = gfxSize(destRect.width / imageSize.width, destRect.height / imageSize.height);
1.2078 +
1.2079 + // If we are not scaling at all, no point in separating this into a layer.
1.2080 + if (scale.width == 1.0f && scale.height == 1.0f) {
1.2081 + return LAYER_NONE;
1.2082 + }
1.2083 +
1.2084 + // If the target size is pretty small, no point in using a layer.
1.2085 + if (destRect.width * destRect.height < 64 * 64) {
1.2086 + return LAYER_NONE;
1.2087 + }
1.2088 + }
1.2089 +
1.2090 + return LAYER_ACTIVE;
1.2091 +}
1.2092 +
1.2093 +already_AddRefed<Layer>
1.2094 +nsDisplayBackgroundImage::BuildLayer(nsDisplayListBuilder* aBuilder,
1.2095 + LayerManager* aManager,
1.2096 + const ContainerLayerParameters& aParameters)
1.2097 +{
1.2098 + nsRefPtr<ImageLayer> layer = static_cast<ImageLayer*>
1.2099 + (aManager->GetLayerBuilder()->GetLeafLayerFor(aBuilder, this));
1.2100 + if (!layer) {
1.2101 + layer = aManager->CreateImageLayer();
1.2102 + if (!layer)
1.2103 + return nullptr;
1.2104 + }
1.2105 + layer->SetContainer(mImageContainer);
1.2106 + ConfigureLayer(layer, aParameters.mOffset);
1.2107 + return layer.forget();
1.2108 +}
1.2109 +
1.2110 +void
1.2111 +nsDisplayBackgroundImage::ConfigureLayer(ImageLayer* aLayer, const nsIntPoint& aOffset)
1.2112 +{
1.2113 + aLayer->SetFilter(nsLayoutUtils::GetGraphicsFilterForFrame(mFrame));
1.2114 +
1.2115 + mozilla::gfx::IntSize imageSize = mImageContainer->GetCurrentSize();
1.2116 + NS_ASSERTION(imageSize.width != 0 && imageSize.height != 0, "Invalid image size!");
1.2117 +
1.2118 + gfxPoint p = mDestRect.TopLeft() + aOffset;
1.2119 + gfx::Matrix transform;
1.2120 + transform.Translate(p.x, p.y);
1.2121 + transform.Scale(mDestRect.width/imageSize.width,
1.2122 + mDestRect.height/imageSize.height);
1.2123 + aLayer->SetBaseTransform(gfx::Matrix4x4::From2D(transform));
1.2124 + aLayer->SetVisibleRegion(nsIntRect(0, 0, imageSize.width, imageSize.height));
1.2125 +}
1.2126 +
1.2127 +void
1.2128 +nsDisplayBackgroundImage::HitTest(nsDisplayListBuilder* aBuilder,
1.2129 + const nsRect& aRect,
1.2130 + HitTestState* aState,
1.2131 + nsTArray<nsIFrame*> *aOutFrames)
1.2132 +{
1.2133 + if (RoundedBorderIntersectsRect(mFrame, ToReferenceFrame(), aRect)) {
1.2134 + aOutFrames->AppendElement(mFrame);
1.2135 + }
1.2136 +}
1.2137 +
1.2138 +bool
1.2139 +nsDisplayBackgroundImage::ComputeVisibility(nsDisplayListBuilder* aBuilder,
1.2140 + nsRegion* aVisibleRegion,
1.2141 + const nsRect& aAllowVisibleRegionExpansion)
1.2142 +{
1.2143 + if (!nsDisplayItem::ComputeVisibility(aBuilder, aVisibleRegion,
1.2144 + aAllowVisibleRegionExpansion)) {
1.2145 + return false;
1.2146 + }
1.2147 +
1.2148 + // Return false if the background was propagated away from this
1.2149 + // frame. We don't want this display item to show up and confuse
1.2150 + // anything.
1.2151 + return mBackgroundStyle;
1.2152 +}
1.2153 +
1.2154 +/* static */ nsRegion
1.2155 +nsDisplayBackgroundImage::GetInsideClipRegion(nsDisplayItem* aItem,
1.2156 + nsPresContext* aPresContext,
1.2157 + uint8_t aClip, const nsRect& aRect,
1.2158 + bool* aSnap)
1.2159 +{
1.2160 + nsRegion result;
1.2161 + if (aRect.IsEmpty())
1.2162 + return result;
1.2163 +
1.2164 + nsIFrame *frame = aItem->Frame();
1.2165 +
1.2166 + nscoord radii[8];
1.2167 + nsRect clipRect;
1.2168 + bool haveRadii;
1.2169 + switch (aClip) {
1.2170 + case NS_STYLE_BG_CLIP_BORDER:
1.2171 + haveRadii = frame->GetBorderRadii(radii);
1.2172 + clipRect = nsRect(aItem->ToReferenceFrame(), frame->GetSize());
1.2173 + break;
1.2174 + case NS_STYLE_BG_CLIP_PADDING:
1.2175 + haveRadii = frame->GetPaddingBoxBorderRadii(radii);
1.2176 + clipRect = frame->GetPaddingRect() - frame->GetPosition() + aItem->ToReferenceFrame();
1.2177 + break;
1.2178 + case NS_STYLE_BG_CLIP_CONTENT:
1.2179 + haveRadii = frame->GetContentBoxBorderRadii(radii);
1.2180 + clipRect = frame->GetContentRect() - frame->GetPosition() + aItem->ToReferenceFrame();
1.2181 + break;
1.2182 + default:
1.2183 + NS_NOTREACHED("Unknown clip type");
1.2184 + return result;
1.2185 + }
1.2186 +
1.2187 + if (haveRadii) {
1.2188 + *aSnap = false;
1.2189 + result = nsLayoutUtils::RoundedRectIntersectRect(clipRect, radii, aRect);
1.2190 + } else {
1.2191 + result = clipRect.Intersect(aRect);
1.2192 + }
1.2193 + return result;
1.2194 +}
1.2195 +
1.2196 +nsRegion
1.2197 +nsDisplayBackgroundImage::GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
1.2198 + bool* aSnap) {
1.2199 + nsRegion result;
1.2200 + *aSnap = false;
1.2201 +
1.2202 + if (!mBackgroundStyle)
1.2203 + return result;
1.2204 +
1.2205 +
1.2206 + *aSnap = true;
1.2207 +
1.2208 + // For policies other than EACH_BOX, don't try to optimize here, since
1.2209 + // this could easily lead to O(N^2) behavior inside InlineBackgroundData,
1.2210 + // which expects frames to be sent to it in content order, not reverse
1.2211 + // content order which we'll produce here.
1.2212 + // Of course, if there's only one frame in the flow, it doesn't matter.
1.2213 + if (mBackgroundStyle->mBackgroundInlinePolicy == NS_STYLE_BG_INLINE_POLICY_EACH_BOX ||
1.2214 + (!mFrame->GetPrevContinuation() && !mFrame->GetNextContinuation())) {
1.2215 + const nsStyleBackground::Layer& layer = mBackgroundStyle->mLayers[mLayer];
1.2216 + if (layer.mImage.IsOpaque() && layer.mBlendMode == NS_STYLE_BLEND_NORMAL) {
1.2217 + nsPresContext* presContext = mFrame->PresContext();
1.2218 + result = GetInsideClipRegion(this, presContext, layer.mClip, mBounds, aSnap);
1.2219 + }
1.2220 + }
1.2221 +
1.2222 + return result;
1.2223 +}
1.2224 +
1.2225 +bool
1.2226 +nsDisplayBackgroundImage::IsUniform(nsDisplayListBuilder* aBuilder, nscolor* aColor) {
1.2227 + if (!mBackgroundStyle) {
1.2228 + *aColor = NS_RGBA(0,0,0,0);
1.2229 + return true;
1.2230 + }
1.2231 + return false;
1.2232 +}
1.2233 +
1.2234 +bool
1.2235 +nsDisplayBackgroundImage::IsVaryingRelativeToMovingFrame(nsDisplayListBuilder* aBuilder,
1.2236 + nsIFrame* aFrame)
1.2237 +{
1.2238 + if (!mBackgroundStyle)
1.2239 + return false;
1.2240 + if (!mBackgroundStyle->HasFixedBackground())
1.2241 + return false;
1.2242 +
1.2243 + // If aFrame is mFrame or an ancestor in this document, and aFrame is
1.2244 + // not the viewport frame, then moving aFrame will move mFrame
1.2245 + // relative to the viewport, so our fixed-pos background will change.
1.2246 + return aFrame->GetParent() &&
1.2247 + (aFrame == mFrame ||
1.2248 + nsLayoutUtils::IsProperAncestorFrame(aFrame, mFrame));
1.2249 +}
1.2250 +
1.2251 +nsRect
1.2252 +nsDisplayBackgroundImage::GetPositioningArea()
1.2253 +{
1.2254 + if (!mBackgroundStyle) {
1.2255 + return nsRect();
1.2256 + }
1.2257 + nsIFrame* attachedToFrame;
1.2258 + return nsCSSRendering::ComputeBackgroundPositioningArea(
1.2259 + mFrame->PresContext(), mFrame,
1.2260 + nsRect(ToReferenceFrame(), mFrame->GetSize()),
1.2261 + *mBackgroundStyle, mBackgroundStyle->mLayers[mLayer],
1.2262 + &attachedToFrame) + ToReferenceFrame();
1.2263 +}
1.2264 +
1.2265 +bool
1.2266 +nsDisplayBackgroundImage::RenderingMightDependOnPositioningAreaSizeChange()
1.2267 +{
1.2268 + if (!mBackgroundStyle)
1.2269 + return false;
1.2270 +
1.2271 + nscoord radii[8];
1.2272 + if (mFrame->GetBorderRadii(radii)) {
1.2273 + // A change in the size of the positioning area might change the position
1.2274 + // of the rounded corners.
1.2275 + return true;
1.2276 + }
1.2277 +
1.2278 + const nsStyleBackground::Layer &layer = mBackgroundStyle->mLayers[mLayer];
1.2279 + if (layer.RenderingMightDependOnPositioningAreaSizeChange()) {
1.2280 + return true;
1.2281 + }
1.2282 + return false;
1.2283 +}
1.2284 +
1.2285 +static void CheckForBorderItem(nsDisplayItem *aItem, uint32_t& aFlags)
1.2286 +{
1.2287 + nsDisplayItem* nextItem = aItem->GetAbove();
1.2288 + while (nextItem && nextItem->GetType() == nsDisplayItem::TYPE_BACKGROUND) {
1.2289 + nextItem = nextItem->GetAbove();
1.2290 + }
1.2291 + if (nextItem &&
1.2292 + nextItem->Frame() == aItem->Frame() &&
1.2293 + nextItem->GetType() == nsDisplayItem::TYPE_BORDER) {
1.2294 + aFlags |= nsCSSRendering::PAINTBG_WILL_PAINT_BORDER;
1.2295 + }
1.2296 +}
1.2297 +
1.2298 +void
1.2299 +nsDisplayBackgroundImage::Paint(nsDisplayListBuilder* aBuilder,
1.2300 + nsRenderingContext* aCtx) {
1.2301 + PaintInternal(aBuilder, aCtx, mVisibleRect, nullptr);
1.2302 +}
1.2303 +
1.2304 +void
1.2305 +nsDisplayBackgroundImage::PaintInternal(nsDisplayListBuilder* aBuilder,
1.2306 + nsRenderingContext* aCtx, const nsRect& aBounds,
1.2307 + nsRect* aClipRect) {
1.2308 + nsPoint offset = ToReferenceFrame();
1.2309 + uint32_t flags = aBuilder->GetBackgroundPaintFlags();
1.2310 + CheckForBorderItem(this, flags);
1.2311 +
1.2312 + nsCSSRendering::PaintBackground(mFrame->PresContext(), *aCtx, mFrame,
1.2313 + aBounds,
1.2314 + nsRect(offset, mFrame->GetSize()),
1.2315 + flags, aClipRect, mLayer);
1.2316 +
1.2317 +}
1.2318 +
1.2319 +void nsDisplayBackgroundImage::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
1.2320 + const nsDisplayItemGeometry* aGeometry,
1.2321 + nsRegion* aInvalidRegion)
1.2322 +{
1.2323 + if (!mBackgroundStyle) {
1.2324 + return;
1.2325 + }
1.2326 +
1.2327 + const nsDisplayBackgroundGeometry* geometry = static_cast<const nsDisplayBackgroundGeometry*>(aGeometry);
1.2328 +
1.2329 + bool snap;
1.2330 + nsRect bounds = GetBounds(aBuilder, &snap);
1.2331 + nsRect positioningArea = GetPositioningArea();
1.2332 + if (positioningArea.TopLeft() != geometry->mPositioningArea.TopLeft() ||
1.2333 + (positioningArea.Size() != geometry->mPositioningArea.Size() &&
1.2334 + RenderingMightDependOnPositioningAreaSizeChange())) {
1.2335 + // Positioning area changed in a way that could cause everything to change,
1.2336 + // so invalidate everything (both old and new painting areas).
1.2337 + aInvalidRegion->Or(bounds, geometry->mBounds);
1.2338 +
1.2339 + if (positioningArea.Size() != geometry->mPositioningArea.Size()) {
1.2340 + NotifyRenderingChanged();
1.2341 + }
1.2342 + return;
1.2343 + }
1.2344 + if (aBuilder->ShouldSyncDecodeImages()) {
1.2345 + if (mBackgroundStyle &&
1.2346 + !nsCSSRendering::IsBackgroundImageDecodedForStyleContextAndLayer(mBackgroundStyle, mLayer)) {
1.2347 + aInvalidRegion->Or(*aInvalidRegion, bounds);
1.2348 +
1.2349 + NotifyRenderingChanged();
1.2350 + }
1.2351 + }
1.2352 + if (!bounds.IsEqualInterior(geometry->mBounds)) {
1.2353 + // Positioning area is unchanged, so invalidate just the change in the
1.2354 + // painting area.
1.2355 + aInvalidRegion->Xor(bounds, geometry->mBounds);
1.2356 +
1.2357 + NotifyRenderingChanged();
1.2358 + }
1.2359 +}
1.2360 +
1.2361 +nsRect
1.2362 +nsDisplayBackgroundImage::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) {
1.2363 + *aSnap = true;
1.2364 + return mBounds;
1.2365 +}
1.2366 +
1.2367 +nsRect
1.2368 +nsDisplayBackgroundImage::GetBoundsInternal(nsDisplayListBuilder* aBuilder) {
1.2369 + nsPresContext* presContext = mFrame->PresContext();
1.2370 +
1.2371 + if (!mBackgroundStyle) {
1.2372 + return nsRect();
1.2373 + }
1.2374 +
1.2375 + nsRect borderBox = nsRect(ToReferenceFrame(), mFrame->GetSize());
1.2376 + nsRect clipRect = borderBox;
1.2377 + if (mFrame->GetType() == nsGkAtoms::canvasFrame) {
1.2378 + nsCanvasFrame* frame = static_cast<nsCanvasFrame*>(mFrame);
1.2379 + clipRect = frame->CanvasArea() + ToReferenceFrame();
1.2380 + }
1.2381 + const nsStyleBackground::Layer& layer = mBackgroundStyle->mLayers[mLayer];
1.2382 + return nsCSSRendering::GetBackgroundLayerRect(presContext, mFrame,
1.2383 + borderBox, clipRect,
1.2384 + *mBackgroundStyle, layer,
1.2385 + aBuilder->GetBackgroundPaintFlags());
1.2386 +}
1.2387 +
1.2388 +uint32_t
1.2389 +nsDisplayBackgroundImage::GetPerFrameKey()
1.2390 +{
1.2391 + return (mLayer << nsDisplayItem::TYPE_BITS) |
1.2392 + nsDisplayItem::GetPerFrameKey();
1.2393 +}
1.2394 +
1.2395 +nsDisplayThemedBackground::nsDisplayThemedBackground(nsDisplayListBuilder* aBuilder,
1.2396 + nsIFrame* aFrame)
1.2397 + : nsDisplayItem(aBuilder, aFrame)
1.2398 +{
1.2399 + MOZ_COUNT_CTOR(nsDisplayThemedBackground);
1.2400 +
1.2401 + const nsStyleDisplay* disp = mFrame->StyleDisplay();
1.2402 + mAppearance = disp->mAppearance;
1.2403 + mFrame->IsThemed(disp, &mThemeTransparency);
1.2404 +
1.2405 + // Perform necessary RegisterThemeGeometry
1.2406 + switch (disp->mAppearance) {
1.2407 + case NS_THEME_MOZ_MAC_UNIFIED_TOOLBAR:
1.2408 + case NS_THEME_TOOLBAR:
1.2409 + case NS_THEME_WINDOW_TITLEBAR:
1.2410 + case NS_THEME_WINDOW_BUTTON_BOX:
1.2411 + case NS_THEME_MOZ_MAC_FULLSCREEN_BUTTON:
1.2412 + case NS_THEME_WINDOW_BUTTON_BOX_MAXIMIZED:
1.2413 + RegisterThemeGeometry(aBuilder, aFrame);
1.2414 + break;
1.2415 + case NS_THEME_WIN_BORDERLESS_GLASS:
1.2416 + case NS_THEME_WIN_GLASS:
1.2417 + aBuilder->SetGlassDisplayItem(this);
1.2418 + break;
1.2419 + }
1.2420 +
1.2421 + mBounds = GetBoundsInternal();
1.2422 +}
1.2423 +
1.2424 +nsDisplayThemedBackground::~nsDisplayThemedBackground()
1.2425 +{
1.2426 +#ifdef NS_BUILD_REFCNT_LOGGING
1.2427 + MOZ_COUNT_DTOR(nsDisplayThemedBackground);
1.2428 +#endif
1.2429 +}
1.2430 +
1.2431 +#ifdef MOZ_DUMP_PAINTING
1.2432 +void
1.2433 +nsDisplayThemedBackground::WriteDebugInfo(nsACString& aTo)
1.2434 +{
1.2435 + aTo += nsPrintfCString(" (themed, appearance:%d)", mAppearance);
1.2436 +}
1.2437 +#endif
1.2438 +
1.2439 +void
1.2440 +nsDisplayThemedBackground::HitTest(nsDisplayListBuilder* aBuilder,
1.2441 + const nsRect& aRect,
1.2442 + HitTestState* aState,
1.2443 + nsTArray<nsIFrame*> *aOutFrames)
1.2444 +{
1.2445 + // Assume that any point in our border rect is a hit.
1.2446 + if (nsRect(ToReferenceFrame(), mFrame->GetSize()).Intersects(aRect)) {
1.2447 + aOutFrames->AppendElement(mFrame);
1.2448 + }
1.2449 +}
1.2450 +
1.2451 +nsRegion
1.2452 +nsDisplayThemedBackground::GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
1.2453 + bool* aSnap) {
1.2454 + nsRegion result;
1.2455 + *aSnap = false;
1.2456 +
1.2457 + if (mThemeTransparency == nsITheme::eOpaque) {
1.2458 + result = nsRect(ToReferenceFrame(), mFrame->GetSize());
1.2459 + }
1.2460 + return result;
1.2461 +}
1.2462 +
1.2463 +bool
1.2464 +nsDisplayThemedBackground::IsUniform(nsDisplayListBuilder* aBuilder, nscolor* aColor) {
1.2465 + if (mAppearance == NS_THEME_WIN_BORDERLESS_GLASS ||
1.2466 + mAppearance == NS_THEME_WIN_GLASS) {
1.2467 + *aColor = NS_RGBA(0,0,0,0);
1.2468 + return true;
1.2469 + }
1.2470 + return false;
1.2471 +}
1.2472 +
1.2473 +nsRect
1.2474 +nsDisplayThemedBackground::GetPositioningArea()
1.2475 +{
1.2476 + return nsRect(ToReferenceFrame(), mFrame->GetSize());
1.2477 +}
1.2478 +
1.2479 +void
1.2480 +nsDisplayThemedBackground::Paint(nsDisplayListBuilder* aBuilder,
1.2481 + nsRenderingContext* aCtx)
1.2482 +{
1.2483 + PaintInternal(aBuilder, aCtx, mVisibleRect, nullptr);
1.2484 +}
1.2485 +
1.2486 +
1.2487 +void
1.2488 +nsDisplayThemedBackground::PaintInternal(nsDisplayListBuilder* aBuilder,
1.2489 + nsRenderingContext* aCtx, const nsRect& aBounds,
1.2490 + nsRect* aClipRect)
1.2491 +{
1.2492 + // XXXzw this ignores aClipRect.
1.2493 + nsPresContext* presContext = mFrame->PresContext();
1.2494 + nsITheme *theme = presContext->GetTheme();
1.2495 + nsRect borderArea(ToReferenceFrame(), mFrame->GetSize());
1.2496 + nsRect drawing(borderArea);
1.2497 + theme->GetWidgetOverflow(presContext->DeviceContext(), mFrame, mAppearance,
1.2498 + &drawing);
1.2499 + drawing.IntersectRect(drawing, aBounds);
1.2500 + theme->DrawWidgetBackground(aCtx, mFrame, mAppearance, borderArea, drawing);
1.2501 +}
1.2502 +
1.2503 +bool nsDisplayThemedBackground::IsWindowActive()
1.2504 +{
1.2505 + EventStates docState = mFrame->GetContent()->OwnerDoc()->GetDocumentState();
1.2506 + return !docState.HasState(NS_DOCUMENT_STATE_WINDOW_INACTIVE);
1.2507 +}
1.2508 +
1.2509 +void nsDisplayThemedBackground::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
1.2510 + const nsDisplayItemGeometry* aGeometry,
1.2511 + nsRegion* aInvalidRegion)
1.2512 +{
1.2513 + const nsDisplayThemedBackgroundGeometry* geometry = static_cast<const nsDisplayThemedBackgroundGeometry*>(aGeometry);
1.2514 +
1.2515 + bool snap;
1.2516 + nsRect bounds = GetBounds(aBuilder, &snap);
1.2517 + nsRect positioningArea = GetPositioningArea();
1.2518 + if (!positioningArea.IsEqualInterior(geometry->mPositioningArea)) {
1.2519 + // Invalidate everything (both old and new painting areas).
1.2520 + aInvalidRegion->Or(bounds, geometry->mBounds);
1.2521 + return;
1.2522 + }
1.2523 + if (!bounds.IsEqualInterior(geometry->mBounds)) {
1.2524 + // Positioning area is unchanged, so invalidate just the change in the
1.2525 + // painting area.
1.2526 + aInvalidRegion->Xor(bounds, geometry->mBounds);
1.2527 + }
1.2528 + nsITheme* theme = mFrame->PresContext()->GetTheme();
1.2529 + if (theme->WidgetAppearanceDependsOnWindowFocus(mAppearance) &&
1.2530 + IsWindowActive() != geometry->mWindowIsActive) {
1.2531 + aInvalidRegion->Or(*aInvalidRegion, bounds);
1.2532 + }
1.2533 +}
1.2534 +
1.2535 +nsRect
1.2536 +nsDisplayThemedBackground::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) {
1.2537 + *aSnap = true;
1.2538 + return mBounds;
1.2539 +}
1.2540 +
1.2541 +nsRect
1.2542 +nsDisplayThemedBackground::GetBoundsInternal() {
1.2543 + nsPresContext* presContext = mFrame->PresContext();
1.2544 +
1.2545 + nsRect r(nsPoint(0,0), mFrame->GetSize());
1.2546 + presContext->GetTheme()->
1.2547 + GetWidgetOverflow(presContext->DeviceContext(), mFrame,
1.2548 + mFrame->StyleDisplay()->mAppearance, &r);
1.2549 +#ifdef XP_MACOSX
1.2550 + // Bug 748219
1.2551 + r.Inflate(mFrame->PresContext()->AppUnitsPerDevPixel());
1.2552 +#endif
1.2553 +
1.2554 + return r + ToReferenceFrame();
1.2555 +}
1.2556 +
1.2557 +void
1.2558 +nsDisplayBackgroundColor::Paint(nsDisplayListBuilder* aBuilder,
1.2559 + nsRenderingContext* aCtx)
1.2560 +{
1.2561 + if (mColor == NS_RGBA(0, 0, 0, 0)) {
1.2562 + return;
1.2563 + }
1.2564 +
1.2565 + nsPoint offset = ToReferenceFrame();
1.2566 + uint32_t flags = aBuilder->GetBackgroundPaintFlags();
1.2567 + CheckForBorderItem(this, flags);
1.2568 + nsCSSRendering::PaintBackgroundColor(mFrame->PresContext(), *aCtx, mFrame,
1.2569 + mVisibleRect,
1.2570 + nsRect(offset, mFrame->GetSize()),
1.2571 + flags);
1.2572 +}
1.2573 +
1.2574 +nsRegion
1.2575 +nsDisplayBackgroundColor::GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
1.2576 + bool* aSnap)
1.2577 +{
1.2578 + if (NS_GET_A(mColor) != 255) {
1.2579 + return nsRegion();
1.2580 + }
1.2581 +
1.2582 + if (!mBackgroundStyle)
1.2583 + return nsRegion();
1.2584 +
1.2585 + *aSnap = true;
1.2586 +
1.2587 + const nsStyleBackground::Layer& bottomLayer = mBackgroundStyle->BottomLayer();
1.2588 + nsRect borderBox = nsRect(ToReferenceFrame(), mFrame->GetSize());
1.2589 + nsPresContext* presContext = mFrame->PresContext();
1.2590 + return nsDisplayBackgroundImage::GetInsideClipRegion(this, presContext, bottomLayer.mClip, borderBox, aSnap);
1.2591 +}
1.2592 +
1.2593 +bool
1.2594 +nsDisplayBackgroundColor::IsUniform(nsDisplayListBuilder* aBuilder, nscolor* aColor)
1.2595 +{
1.2596 + *aColor = mColor;
1.2597 +
1.2598 + if (!mBackgroundStyle)
1.2599 + return true;
1.2600 +
1.2601 + return (!nsLayoutUtils::HasNonZeroCorner(mFrame->StyleBorder()->mBorderRadius) &&
1.2602 + mBackgroundStyle->BottomLayer().mClip == NS_STYLE_BG_CLIP_BORDER);
1.2603 +}
1.2604 +
1.2605 +void
1.2606 +nsDisplayBackgroundColor::HitTest(nsDisplayListBuilder* aBuilder,
1.2607 + const nsRect& aRect,
1.2608 + HitTestState* aState,
1.2609 + nsTArray<nsIFrame*> *aOutFrames)
1.2610 +{
1.2611 + if (!RoundedBorderIntersectsRect(mFrame, ToReferenceFrame(), aRect)) {
1.2612 + // aRect doesn't intersect our border-radius curve.
1.2613 + return;
1.2614 + }
1.2615 +
1.2616 + aOutFrames->AppendElement(mFrame);
1.2617 +}
1.2618 +
1.2619 +#ifdef MOZ_DUMP_PAINTING
1.2620 +void
1.2621 +nsDisplayBackgroundColor::WriteDebugInfo(nsACString& aTo)
1.2622 +{
1.2623 + aTo += nsPrintfCString(" (rgba %d,%d,%d,%d)",
1.2624 + NS_GET_R(mColor), NS_GET_G(mColor),
1.2625 + NS_GET_B(mColor), NS_GET_A(mColor));
1.2626 +}
1.2627 +#endif
1.2628 +
1.2629 +nsRect
1.2630 +nsDisplayOutline::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) {
1.2631 + *aSnap = false;
1.2632 + return mFrame->GetVisualOverflowRectRelativeToSelf() + ToReferenceFrame();
1.2633 +}
1.2634 +
1.2635 +void
1.2636 +nsDisplayOutline::Paint(nsDisplayListBuilder* aBuilder,
1.2637 + nsRenderingContext* aCtx) {
1.2638 + // TODO join outlines together
1.2639 + nsPoint offset = ToReferenceFrame();
1.2640 + nsCSSRendering::PaintOutline(mFrame->PresContext(), *aCtx, mFrame,
1.2641 + mVisibleRect,
1.2642 + nsRect(offset, mFrame->GetSize()),
1.2643 + mFrame->StyleContext());
1.2644 +}
1.2645 +
1.2646 +bool
1.2647 +nsDisplayOutline::ComputeVisibility(nsDisplayListBuilder* aBuilder,
1.2648 + nsRegion* aVisibleRegion,
1.2649 + const nsRect& aAllowVisibleRegionExpansion) {
1.2650 + if (!nsDisplayItem::ComputeVisibility(aBuilder, aVisibleRegion,
1.2651 + aAllowVisibleRegionExpansion)) {
1.2652 + return false;
1.2653 + }
1.2654 +
1.2655 + const nsStyleOutline* outline = mFrame->StyleOutline();
1.2656 + nsRect borderBox(ToReferenceFrame(), mFrame->GetSize());
1.2657 + if (borderBox.Contains(aVisibleRegion->GetBounds()) &&
1.2658 + !nsLayoutUtils::HasNonZeroCorner(outline->mOutlineRadius)) {
1.2659 + if (outline->mOutlineOffset >= 0) {
1.2660 + // the visible region is entirely inside the border-rect, and the outline
1.2661 + // isn't rendered inside the border-rect, so the outline is not visible
1.2662 + return false;
1.2663 + }
1.2664 + }
1.2665 +
1.2666 + return true;
1.2667 +}
1.2668 +
1.2669 +void
1.2670 +nsDisplayEventReceiver::HitTest(nsDisplayListBuilder* aBuilder,
1.2671 + const nsRect& aRect,
1.2672 + HitTestState* aState,
1.2673 + nsTArray<nsIFrame*> *aOutFrames)
1.2674 +{
1.2675 + if (!RoundedBorderIntersectsRect(mFrame, ToReferenceFrame(), aRect)) {
1.2676 + // aRect doesn't intersect our border-radius curve.
1.2677 + return;
1.2678 + }
1.2679 +
1.2680 + aOutFrames->AppendElement(mFrame);
1.2681 +}
1.2682 +
1.2683 +void
1.2684 +nsDisplayLayerEventRegions::AddFrame(nsDisplayListBuilder* aBuilder,
1.2685 + nsIFrame* aFrame)
1.2686 +{
1.2687 + NS_ASSERTION(aBuilder->FindReferenceFrameFor(aFrame) == aBuilder->FindReferenceFrameFor(mFrame),
1.2688 + "Reference frame mismatch");
1.2689 + uint8_t pointerEvents = aFrame->StyleVisibility()->mPointerEvents;
1.2690 + if (pointerEvents == NS_STYLE_POINTER_EVENTS_NONE) {
1.2691 + return;
1.2692 + }
1.2693 + // XXX handle other pointerEvents values for SVG
1.2694 + // XXX Do something clever here for the common case where the border box
1.2695 + // is obviously entirely inside mHitRegion.
1.2696 + nsRect borderBox(aBuilder->ToReferenceFrame(aFrame), aFrame->GetSize());
1.2697 + const DisplayItemClip* clip = aBuilder->ClipState().GetCurrentCombinedClip(aBuilder);
1.2698 + bool borderBoxHasRoundedCorners =
1.2699 + nsLayoutUtils::HasNonZeroCorner(aFrame->StyleBorder()->mBorderRadius);
1.2700 + if (clip) {
1.2701 + borderBox = clip->ApplyNonRoundedIntersection(borderBox);
1.2702 + if (clip->GetRoundedRectCount() > 0) {
1.2703 + borderBoxHasRoundedCorners = true;
1.2704 + }
1.2705 + }
1.2706 + if (borderBoxHasRoundedCorners ||
1.2707 + (aFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT)) {
1.2708 + mMaybeHitRegion.Or(mMaybeHitRegion, borderBox);
1.2709 + } else {
1.2710 + mHitRegion.Or(mHitRegion, borderBox);
1.2711 + }
1.2712 + if (aBuilder->GetAncestorHasTouchEventHandler()) {
1.2713 + mDispatchToContentHitRegion.Or(mDispatchToContentHitRegion, borderBox);
1.2714 + }
1.2715 +}
1.2716 +
1.2717 +void
1.2718 +nsDisplayCaret::Paint(nsDisplayListBuilder* aBuilder,
1.2719 + nsRenderingContext* aCtx) {
1.2720 + // Note: Because we exist, we know that the caret is visible, so we don't
1.2721 + // need to check for the caret's visibility.
1.2722 + mCaret->PaintCaret(aBuilder, aCtx, mFrame, ToReferenceFrame());
1.2723 +}
1.2724 +
1.2725 +bool
1.2726 +nsDisplayBorder::ComputeVisibility(nsDisplayListBuilder* aBuilder,
1.2727 + nsRegion* aVisibleRegion,
1.2728 + const nsRect& aAllowVisibleRegionExpansion) {
1.2729 + if (!nsDisplayItem::ComputeVisibility(aBuilder, aVisibleRegion,
1.2730 + aAllowVisibleRegionExpansion)) {
1.2731 + return false;
1.2732 + }
1.2733 +
1.2734 + nsRect paddingRect = mFrame->GetPaddingRect() - mFrame->GetPosition() +
1.2735 + ToReferenceFrame();
1.2736 + const nsStyleBorder *styleBorder;
1.2737 + if (paddingRect.Contains(aVisibleRegion->GetBounds()) &&
1.2738 + !(styleBorder = mFrame->StyleBorder())->IsBorderImageLoaded() &&
1.2739 + !nsLayoutUtils::HasNonZeroCorner(styleBorder->mBorderRadius)) {
1.2740 + // the visible region is entirely inside the content rect, and no part
1.2741 + // of the border is rendered inside the content rect, so we are not
1.2742 + // visible
1.2743 + // Skip this if there's a border-image (which draws a background
1.2744 + // too) or if there is a border-radius (which makes the border draw
1.2745 + // further in).
1.2746 + return false;
1.2747 + }
1.2748 +
1.2749 + return true;
1.2750 +}
1.2751 +
1.2752 +nsDisplayItemGeometry*
1.2753 +nsDisplayBorder::AllocateGeometry(nsDisplayListBuilder* aBuilder)
1.2754 +{
1.2755 + return new nsDisplayBorderGeometry(this, aBuilder);
1.2756 +}
1.2757 +
1.2758 +void
1.2759 +nsDisplayBorder::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
1.2760 + const nsDisplayItemGeometry* aGeometry,
1.2761 + nsRegion* aInvalidRegion)
1.2762 +{
1.2763 + const nsDisplayBorderGeometry* geometry = static_cast<const nsDisplayBorderGeometry*>(aGeometry);
1.2764 + bool snap;
1.2765 + if (!geometry->mBounds.IsEqualInterior(GetBounds(aBuilder, &snap)) ||
1.2766 + !geometry->mContentRect.IsEqualInterior(GetContentRect())) {
1.2767 + // We can probably get away with only invalidating the difference
1.2768 + // between the border and padding rects, but the XUL ui at least
1.2769 + // is apparently painting a background with this?
1.2770 + aInvalidRegion->Or(GetBounds(aBuilder, &snap), geometry->mBounds);
1.2771 + }
1.2772 +}
1.2773 +
1.2774 +void
1.2775 +nsDisplayBorder::Paint(nsDisplayListBuilder* aBuilder,
1.2776 + nsRenderingContext* aCtx) {
1.2777 + nsPoint offset = ToReferenceFrame();
1.2778 + nsCSSRendering::PaintBorder(mFrame->PresContext(), *aCtx, mFrame,
1.2779 + mVisibleRect,
1.2780 + nsRect(offset, mFrame->GetSize()),
1.2781 + mFrame->StyleContext(),
1.2782 + mFrame->GetSkipSides());
1.2783 +}
1.2784 +
1.2785 +nsRect
1.2786 +nsDisplayBorder::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap)
1.2787 +{
1.2788 + *aSnap = true;
1.2789 + return CalculateBounds(*mFrame->StyleBorder());
1.2790 +}
1.2791 +
1.2792 +nsRect
1.2793 +nsDisplayBorder::CalculateBounds(const nsStyleBorder& aStyleBorder)
1.2794 +{
1.2795 + nsRect borderBounds(ToReferenceFrame(), mFrame->GetSize());
1.2796 + if (aStyleBorder.IsBorderImageLoaded()) {
1.2797 + borderBounds.Inflate(aStyleBorder.GetImageOutset());
1.2798 + return borderBounds;
1.2799 + } else {
1.2800 + nsMargin border = aStyleBorder.GetComputedBorder();
1.2801 + nsRect result;
1.2802 + if (border.top > 0) {
1.2803 + result = nsRect(borderBounds.X(), borderBounds.Y(), borderBounds.Width(), border.top);
1.2804 + }
1.2805 + if (border.right > 0) {
1.2806 + result.UnionRect(result, nsRect(borderBounds.XMost() - border.right, borderBounds.Y(), border.right, borderBounds.Height()));
1.2807 + }
1.2808 + if (border.bottom > 0) {
1.2809 + result.UnionRect(result, nsRect(borderBounds.X(), borderBounds.YMost() - border.bottom, borderBounds.Width(), border.bottom));
1.2810 + }
1.2811 + if (border.left > 0) {
1.2812 + result.UnionRect(result, nsRect(borderBounds.X(), borderBounds.Y(), border.left, borderBounds.Height()));
1.2813 + }
1.2814 +
1.2815 + return result;
1.2816 + }
1.2817 +}
1.2818 +
1.2819 +// Given a region, compute a conservative approximation to it as a list
1.2820 +// of rectangles that aren't vertically adjacent (i.e., vertically
1.2821 +// adjacent or overlapping rectangles are combined).
1.2822 +// Right now this is only approximate, some vertically overlapping rectangles
1.2823 +// aren't guaranteed to be combined.
1.2824 +static void
1.2825 +ComputeDisjointRectangles(const nsRegion& aRegion,
1.2826 + nsTArray<nsRect>* aRects) {
1.2827 + nscoord accumulationMargin = nsPresContext::CSSPixelsToAppUnits(25);
1.2828 + nsRect accumulated;
1.2829 + nsRegionRectIterator iter(aRegion);
1.2830 + while (true) {
1.2831 + const nsRect* r = iter.Next();
1.2832 + if (r && !accumulated.IsEmpty() &&
1.2833 + accumulated.YMost() >= r->y - accumulationMargin) {
1.2834 + accumulated.UnionRect(accumulated, *r);
1.2835 + continue;
1.2836 + }
1.2837 +
1.2838 + if (!accumulated.IsEmpty()) {
1.2839 + aRects->AppendElement(accumulated);
1.2840 + accumulated.SetEmpty();
1.2841 + }
1.2842 +
1.2843 + if (!r)
1.2844 + break;
1.2845 +
1.2846 + accumulated = *r;
1.2847 + }
1.2848 +}
1.2849 +
1.2850 +void
1.2851 +nsDisplayBoxShadowOuter::Paint(nsDisplayListBuilder* aBuilder,
1.2852 + nsRenderingContext* aCtx) {
1.2853 + nsPoint offset = ToReferenceFrame();
1.2854 + nsRect borderRect = mFrame->VisualBorderRectRelativeToSelf() + offset;
1.2855 + nsPresContext* presContext = mFrame->PresContext();
1.2856 + nsAutoTArray<nsRect,10> rects;
1.2857 + ComputeDisjointRectangles(mVisibleRegion, &rects);
1.2858 +
1.2859 + PROFILER_LABEL("nsDisplayBoxShadowOuter", "Paint");
1.2860 + for (uint32_t i = 0; i < rects.Length(); ++i) {
1.2861 + aCtx->PushState();
1.2862 + aCtx->IntersectClip(rects[i]);
1.2863 + nsCSSRendering::PaintBoxShadowOuter(presContext, *aCtx, mFrame,
1.2864 + borderRect, rects[i], mOpacity);
1.2865 + aCtx->PopState();
1.2866 + }
1.2867 +}
1.2868 +
1.2869 +nsRect
1.2870 +nsDisplayBoxShadowOuter::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) {
1.2871 + *aSnap = false;
1.2872 + return mBounds;
1.2873 +}
1.2874 +
1.2875 +nsRect
1.2876 +nsDisplayBoxShadowOuter::GetBoundsInternal() {
1.2877 + return nsLayoutUtils::GetBoxShadowRectForFrame(mFrame, mFrame->GetSize()) +
1.2878 + ToReferenceFrame();
1.2879 +}
1.2880 +
1.2881 +bool
1.2882 +nsDisplayBoxShadowOuter::ComputeVisibility(nsDisplayListBuilder* aBuilder,
1.2883 + nsRegion* aVisibleRegion,
1.2884 + const nsRect& aAllowVisibleRegionExpansion) {
1.2885 + if (!nsDisplayItem::ComputeVisibility(aBuilder, aVisibleRegion,
1.2886 + aAllowVisibleRegionExpansion)) {
1.2887 + return false;
1.2888 + }
1.2889 +
1.2890 + // Store the actual visible region
1.2891 + mVisibleRegion.And(*aVisibleRegion, mVisibleRect);
1.2892 +
1.2893 + nsPoint origin = ToReferenceFrame();
1.2894 + nsRect visibleBounds = aVisibleRegion->GetBounds();
1.2895 + nsRect frameRect(origin, mFrame->GetSize());
1.2896 + if (!frameRect.Contains(visibleBounds))
1.2897 + return true;
1.2898 +
1.2899 + // the visible region is entirely inside the border-rect, and box shadows
1.2900 + // never render within the border-rect (unless there's a border radius).
1.2901 + nscoord twipsRadii[8];
1.2902 + bool hasBorderRadii = mFrame->GetBorderRadii(twipsRadii);
1.2903 + if (!hasBorderRadii)
1.2904 + return false;
1.2905 +
1.2906 + return !RoundedRectContainsRect(frameRect, twipsRadii, visibleBounds);
1.2907 +}
1.2908 +
1.2909 +void
1.2910 +nsDisplayBoxShadowOuter::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
1.2911 + const nsDisplayItemGeometry* aGeometry,
1.2912 + nsRegion* aInvalidRegion)
1.2913 +{
1.2914 + const nsDisplayItemGenericGeometry* geometry =
1.2915 + static_cast<const nsDisplayItemGenericGeometry*>(aGeometry);
1.2916 + bool snap;
1.2917 + if (!geometry->mBounds.IsEqualInterior(GetBounds(aBuilder, &snap)) ||
1.2918 + !geometry->mBorderRect.IsEqualInterior(GetBorderRect())) {
1.2919 + nsRegion oldShadow, newShadow;
1.2920 + nscoord dontCare[8];
1.2921 + bool hasBorderRadius = mFrame->GetBorderRadii(dontCare);
1.2922 + if (hasBorderRadius) {
1.2923 + // If we have rounded corners then we need to invalidate the frame area
1.2924 + // too since we paint into it.
1.2925 + oldShadow = geometry->mBounds;
1.2926 + newShadow = GetBounds(aBuilder, &snap);
1.2927 + } else {
1.2928 + oldShadow = oldShadow.Sub(geometry->mBounds, geometry->mBorderRect);
1.2929 + newShadow = newShadow.Sub(GetBounds(aBuilder, &snap), GetBorderRect());
1.2930 + }
1.2931 + aInvalidRegion->Or(oldShadow, newShadow);
1.2932 + }
1.2933 +}
1.2934 +
1.2935 +
1.2936 +void
1.2937 +nsDisplayBoxShadowInner::Paint(nsDisplayListBuilder* aBuilder,
1.2938 + nsRenderingContext* aCtx) {
1.2939 + nsPoint offset = ToReferenceFrame();
1.2940 + nsRect borderRect = nsRect(offset, mFrame->GetSize());
1.2941 + nsPresContext* presContext = mFrame->PresContext();
1.2942 + nsAutoTArray<nsRect,10> rects;
1.2943 + ComputeDisjointRectangles(mVisibleRegion, &rects);
1.2944 +
1.2945 + PROFILER_LABEL("nsDisplayBoxShadowInner", "Paint");
1.2946 + for (uint32_t i = 0; i < rects.Length(); ++i) {
1.2947 + aCtx->PushState();
1.2948 + aCtx->IntersectClip(rects[i]);
1.2949 + nsCSSRendering::PaintBoxShadowInner(presContext, *aCtx, mFrame,
1.2950 + borderRect, rects[i]);
1.2951 + aCtx->PopState();
1.2952 + }
1.2953 +}
1.2954 +
1.2955 +bool
1.2956 +nsDisplayBoxShadowInner::ComputeVisibility(nsDisplayListBuilder* aBuilder,
1.2957 + nsRegion* aVisibleRegion,
1.2958 + const nsRect& aAllowVisibleRegionExpansion) {
1.2959 + if (!nsDisplayItem::ComputeVisibility(aBuilder, aVisibleRegion,
1.2960 + aAllowVisibleRegionExpansion)) {
1.2961 + return false;
1.2962 + }
1.2963 +
1.2964 + // Store the actual visible region
1.2965 + mVisibleRegion.And(*aVisibleRegion, mVisibleRect);
1.2966 + return true;
1.2967 +}
1.2968 +
1.2969 +nsDisplayWrapList::nsDisplayWrapList(nsDisplayListBuilder* aBuilder,
1.2970 + nsIFrame* aFrame, nsDisplayList* aList)
1.2971 + : nsDisplayItem(aBuilder, aFrame)
1.2972 + , mOverrideZIndex(0)
1.2973 +{
1.2974 + mList.AppendToTop(aList);
1.2975 + UpdateBounds(aBuilder);
1.2976 +
1.2977 + if (!aFrame || !aFrame->IsTransformed()) {
1.2978 + return;
1.2979 + }
1.2980 +
1.2981 + // If the frame is a preserve-3d parent, then we will create transforms
1.2982 + // inside this list afterwards (see WrapPreserve3DList in nsFrame.cpp).
1.2983 + // In this case we will always be outside of the transform, so share
1.2984 + // our parents reference frame.
1.2985 + if (aFrame->Preserves3DChildren()) {
1.2986 + mReferenceFrame =
1.2987 + aBuilder->FindReferenceFrameFor(GetTransformRootFrame(aFrame));
1.2988 + mToReferenceFrame = aFrame->GetOffsetToCrossDoc(mReferenceFrame);
1.2989 + return;
1.2990 + }
1.2991 +
1.2992 + // If we're a transformed frame, then we need to find out if we're inside
1.2993 + // the nsDisplayTransform or outside of it. Frames inside the transform
1.2994 + // need mReferenceFrame == mFrame, outside needs the next ancestor
1.2995 + // reference frame.
1.2996 + // If we're inside the transform, then the nsDisplayItem constructor
1.2997 + // will have done the right thing.
1.2998 + // If we're outside the transform, then we should have only one child
1.2999 + // (since nsDisplayTransform wraps all actual content), and that child
1.3000 + // will have the correct reference frame set (since nsDisplayTransform
1.3001 + // handles this explictly).
1.3002 + //
1.3003 + // Preserve-3d can cause us to have multiple nsDisplayTransform
1.3004 + // children.
1.3005 + nsDisplayItem *i = mList.GetBottom();
1.3006 + if (i && (!i->GetAbove() || i->GetType() == TYPE_TRANSFORM) &&
1.3007 + i->Frame() == mFrame) {
1.3008 + mReferenceFrame = i->ReferenceFrame();
1.3009 + mToReferenceFrame = i->ToReferenceFrame();
1.3010 + }
1.3011 +}
1.3012 +
1.3013 +nsDisplayWrapList::nsDisplayWrapList(nsDisplayListBuilder* aBuilder,
1.3014 + nsIFrame* aFrame, nsDisplayItem* aItem)
1.3015 + : nsDisplayItem(aBuilder, aFrame)
1.3016 + , mOverrideZIndex(0)
1.3017 +{
1.3018 + mList.AppendToTop(aItem);
1.3019 + UpdateBounds(aBuilder);
1.3020 +
1.3021 + if (!aFrame || !aFrame->IsTransformed()) {
1.3022 + return;
1.3023 + }
1.3024 +
1.3025 + if (aFrame->Preserves3DChildren()) {
1.3026 + mReferenceFrame =
1.3027 + aBuilder->FindReferenceFrameFor(GetTransformRootFrame(aFrame));
1.3028 + mToReferenceFrame = aFrame->GetOffsetToCrossDoc(mReferenceFrame);
1.3029 + return;
1.3030 + }
1.3031 +
1.3032 + // See the previous nsDisplayWrapList constructor
1.3033 + if (aItem->Frame() == aFrame) {
1.3034 + mReferenceFrame = aItem->ReferenceFrame();
1.3035 + mToReferenceFrame = aItem->ToReferenceFrame();
1.3036 + }
1.3037 +}
1.3038 +
1.3039 +nsDisplayWrapList::nsDisplayWrapList(nsDisplayListBuilder* aBuilder,
1.3040 + nsIFrame* aFrame, nsDisplayItem* aItem,
1.3041 + const nsIFrame* aReferenceFrame,
1.3042 + const nsPoint& aToReferenceFrame)
1.3043 + : nsDisplayItem(aBuilder, aFrame, aReferenceFrame, aToReferenceFrame)
1.3044 + , mOverrideZIndex(0)
1.3045 +{
1.3046 + mList.AppendToTop(aItem);
1.3047 + mBounds = mList.GetBounds(aBuilder);
1.3048 +}
1.3049 +
1.3050 +nsDisplayWrapList::~nsDisplayWrapList() {
1.3051 + mList.DeleteAll();
1.3052 +}
1.3053 +
1.3054 +void
1.3055 +nsDisplayWrapList::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
1.3056 + HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames) {
1.3057 + mList.HitTest(aBuilder, aRect, aState, aOutFrames);
1.3058 +}
1.3059 +
1.3060 +nsRect
1.3061 +nsDisplayWrapList::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) {
1.3062 + *aSnap = false;
1.3063 + return mBounds;
1.3064 +}
1.3065 +
1.3066 +bool
1.3067 +nsDisplayWrapList::ComputeVisibility(nsDisplayListBuilder* aBuilder,
1.3068 + nsRegion* aVisibleRegion,
1.3069 + const nsRect& aAllowVisibleRegionExpansion) {
1.3070 + // Convert the passed in visible region to our appunits.
1.3071 + nsRegion visibleRegion;
1.3072 + // mVisibleRect has been clipped to GetClippedBounds
1.3073 + visibleRegion.And(*aVisibleRegion, mVisibleRect);
1.3074 + nsRegion originalVisibleRegion = visibleRegion;
1.3075 +
1.3076 + bool retval =
1.3077 + mList.ComputeVisibilityForSublist(aBuilder, &visibleRegion,
1.3078 + mVisibleRect,
1.3079 + aAllowVisibleRegionExpansion);
1.3080 +
1.3081 + nsRegion removed;
1.3082 + // removed = originalVisibleRegion - visibleRegion
1.3083 + removed.Sub(originalVisibleRegion, visibleRegion);
1.3084 + // aVisibleRegion = aVisibleRegion - removed (modulo any simplifications
1.3085 + // SubtractFromVisibleRegion does)
1.3086 + aBuilder->SubtractFromVisibleRegion(aVisibleRegion, removed);
1.3087 +
1.3088 + return retval;
1.3089 +}
1.3090 +
1.3091 +nsRegion
1.3092 +nsDisplayWrapList::GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
1.3093 + bool* aSnap) {
1.3094 + *aSnap = false;
1.3095 + nsRegion result;
1.3096 + if (mList.IsOpaque()) {
1.3097 + // Everything within GetBounds that's visible is opaque.
1.3098 + result = GetBounds(aBuilder, aSnap);
1.3099 + }
1.3100 + return result;
1.3101 +}
1.3102 +
1.3103 +bool nsDisplayWrapList::IsUniform(nsDisplayListBuilder* aBuilder, nscolor* aColor) {
1.3104 + // We could try to do something but let's conservatively just return false.
1.3105 + return false;
1.3106 +}
1.3107 +
1.3108 +bool nsDisplayWrapList::IsVaryingRelativeToMovingFrame(nsDisplayListBuilder* aBuilder,
1.3109 + nsIFrame* aFrame) {
1.3110 + NS_WARNING("nsDisplayWrapList::IsVaryingRelativeToMovingFrame called unexpectedly");
1.3111 + // We could try to do something but let's conservatively just return true.
1.3112 + return true;
1.3113 +}
1.3114 +
1.3115 +void nsDisplayWrapList::Paint(nsDisplayListBuilder* aBuilder,
1.3116 + nsRenderingContext* aCtx) {
1.3117 + NS_ERROR("nsDisplayWrapList should have been flattened away for painting");
1.3118 +}
1.3119 +
1.3120 +/**
1.3121 + * Returns true if all descendant display items can be placed in the same
1.3122 + * ThebesLayer --- GetLayerState returns LAYER_INACTIVE or LAYER_NONE,
1.3123 + * and they all have the expected animated geometry root.
1.3124 + */
1.3125 +static LayerState
1.3126 +RequiredLayerStateForChildren(nsDisplayListBuilder* aBuilder,
1.3127 + LayerManager* aManager,
1.3128 + const ContainerLayerParameters& aParameters,
1.3129 + const nsDisplayList& aList,
1.3130 + nsIFrame* aExpectedAnimatedGeometryRootForChildren)
1.3131 +{
1.3132 + LayerState result = LAYER_INACTIVE;
1.3133 + for (nsDisplayItem* i = aList.GetBottom(); i; i = i->GetAbove()) {
1.3134 + if (result == LAYER_INACTIVE &&
1.3135 + nsLayoutUtils::GetAnimatedGeometryRootFor(i, aBuilder) !=
1.3136 + aExpectedAnimatedGeometryRootForChildren) {
1.3137 + result = LAYER_ACTIVE;
1.3138 + }
1.3139 +
1.3140 + LayerState state = i->GetLayerState(aBuilder, aManager, aParameters);
1.3141 + if ((state == LAYER_ACTIVE || state == LAYER_ACTIVE_FORCE) &&
1.3142 + state > result) {
1.3143 + result = state;
1.3144 + }
1.3145 + if (state == LAYER_ACTIVE_EMPTY && state > result) {
1.3146 + result = LAYER_ACTIVE_FORCE;
1.3147 + }
1.3148 + if (state == LAYER_NONE) {
1.3149 + nsDisplayList* list = i->GetSameCoordinateSystemChildren();
1.3150 + if (list) {
1.3151 + LayerState childState =
1.3152 + RequiredLayerStateForChildren(aBuilder, aManager, aParameters, *list,
1.3153 + aExpectedAnimatedGeometryRootForChildren);
1.3154 + if (childState > result) {
1.3155 + result = childState;
1.3156 + }
1.3157 + }
1.3158 + }
1.3159 + }
1.3160 + return result;
1.3161 +}
1.3162 +
1.3163 +nsRect nsDisplayWrapList::GetComponentAlphaBounds(nsDisplayListBuilder* aBuilder)
1.3164 +{
1.3165 + nsRect bounds;
1.3166 + for (nsDisplayItem* i = mList.GetBottom(); i; i = i->GetAbove()) {
1.3167 + bounds.UnionRect(bounds, i->GetComponentAlphaBounds(aBuilder));
1.3168 + }
1.3169 + return bounds;
1.3170 +}
1.3171 +
1.3172 +static nsresult
1.3173 +WrapDisplayList(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame,
1.3174 + nsDisplayList* aList, nsDisplayWrapper* aWrapper) {
1.3175 + if (!aList->GetTop())
1.3176 + return NS_OK;
1.3177 + nsDisplayItem* item = aWrapper->WrapList(aBuilder, aFrame, aList);
1.3178 + if (!item)
1.3179 + return NS_ERROR_OUT_OF_MEMORY;
1.3180 + // aList was emptied
1.3181 + aList->AppendToTop(item);
1.3182 + return NS_OK;
1.3183 +}
1.3184 +
1.3185 +static nsresult
1.3186 +WrapEachDisplayItem(nsDisplayListBuilder* aBuilder,
1.3187 + nsDisplayList* aList, nsDisplayWrapper* aWrapper) {
1.3188 + nsDisplayList newList;
1.3189 + nsDisplayItem* item;
1.3190 + while ((item = aList->RemoveBottom())) {
1.3191 + item = aWrapper->WrapItem(aBuilder, item);
1.3192 + if (!item)
1.3193 + return NS_ERROR_OUT_OF_MEMORY;
1.3194 + newList.AppendToTop(item);
1.3195 + }
1.3196 + // aList was emptied
1.3197 + aList->AppendToTop(&newList);
1.3198 + return NS_OK;
1.3199 +}
1.3200 +
1.3201 +nsresult nsDisplayWrapper::WrapLists(nsDisplayListBuilder* aBuilder,
1.3202 + nsIFrame* aFrame, const nsDisplayListSet& aIn, const nsDisplayListSet& aOut)
1.3203 +{
1.3204 + nsresult rv = WrapListsInPlace(aBuilder, aFrame, aIn);
1.3205 + NS_ENSURE_SUCCESS(rv, rv);
1.3206 +
1.3207 + if (&aOut == &aIn)
1.3208 + return NS_OK;
1.3209 + aOut.BorderBackground()->AppendToTop(aIn.BorderBackground());
1.3210 + aOut.BlockBorderBackgrounds()->AppendToTop(aIn.BlockBorderBackgrounds());
1.3211 + aOut.Floats()->AppendToTop(aIn.Floats());
1.3212 + aOut.Content()->AppendToTop(aIn.Content());
1.3213 + aOut.PositionedDescendants()->AppendToTop(aIn.PositionedDescendants());
1.3214 + aOut.Outlines()->AppendToTop(aIn.Outlines());
1.3215 + return NS_OK;
1.3216 +}
1.3217 +
1.3218 +nsresult nsDisplayWrapper::WrapListsInPlace(nsDisplayListBuilder* aBuilder,
1.3219 + nsIFrame* aFrame, const nsDisplayListSet& aLists)
1.3220 +{
1.3221 + nsresult rv;
1.3222 + if (WrapBorderBackground()) {
1.3223 + // Our border-backgrounds are in-flow
1.3224 + rv = WrapDisplayList(aBuilder, aFrame, aLists.BorderBackground(), this);
1.3225 + NS_ENSURE_SUCCESS(rv, rv);
1.3226 + }
1.3227 + // Our block border-backgrounds are in-flow
1.3228 + rv = WrapDisplayList(aBuilder, aFrame, aLists.BlockBorderBackgrounds(), this);
1.3229 + NS_ENSURE_SUCCESS(rv, rv);
1.3230 + // The floats are not in flow
1.3231 + rv = WrapEachDisplayItem(aBuilder, aLists.Floats(), this);
1.3232 + NS_ENSURE_SUCCESS(rv, rv);
1.3233 + // Our child content is in flow
1.3234 + rv = WrapDisplayList(aBuilder, aFrame, aLists.Content(), this);
1.3235 + NS_ENSURE_SUCCESS(rv, rv);
1.3236 + // The positioned descendants may not be in-flow
1.3237 + rv = WrapEachDisplayItem(aBuilder, aLists.PositionedDescendants(), this);
1.3238 + NS_ENSURE_SUCCESS(rv, rv);
1.3239 + // The outlines may not be in-flow
1.3240 + return WrapEachDisplayItem(aBuilder, aLists.Outlines(), this);
1.3241 +}
1.3242 +
1.3243 +nsDisplayOpacity::nsDisplayOpacity(nsDisplayListBuilder* aBuilder,
1.3244 + nsIFrame* aFrame, nsDisplayList* aList)
1.3245 + : nsDisplayWrapList(aBuilder, aFrame, aList) {
1.3246 + MOZ_COUNT_CTOR(nsDisplayOpacity);
1.3247 +}
1.3248 +
1.3249 +#ifdef NS_BUILD_REFCNT_LOGGING
1.3250 +nsDisplayOpacity::~nsDisplayOpacity() {
1.3251 + MOZ_COUNT_DTOR(nsDisplayOpacity);
1.3252 +}
1.3253 +#endif
1.3254 +
1.3255 +nsRegion nsDisplayOpacity::GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
1.3256 + bool* aSnap) {
1.3257 + *aSnap = false;
1.3258 + // We are never opaque, if our opacity was < 1 then we wouldn't have
1.3259 + // been created.
1.3260 + return nsRegion();
1.3261 +}
1.3262 +
1.3263 +// nsDisplayOpacity uses layers for rendering
1.3264 +already_AddRefed<Layer>
1.3265 +nsDisplayOpacity::BuildLayer(nsDisplayListBuilder* aBuilder,
1.3266 + LayerManager* aManager,
1.3267 + const ContainerLayerParameters& aContainerParameters) {
1.3268 + if (mFrame->StyleDisplay()->mOpacity == 0 && mFrame->GetContent() &&
1.3269 + !nsLayoutUtils::HasAnimations(mFrame->GetContent(), eCSSProperty_opacity)) {
1.3270 + return nullptr;
1.3271 + }
1.3272 + nsRefPtr<Layer> container = aManager->GetLayerBuilder()->
1.3273 + BuildContainerLayerFor(aBuilder, aManager, mFrame, this, mList,
1.3274 + aContainerParameters, nullptr);
1.3275 + if (!container)
1.3276 + return nullptr;
1.3277 +
1.3278 + container->SetOpacity(mFrame->StyleDisplay()->mOpacity);
1.3279 + nsDisplayListBuilder::AddAnimationsAndTransitionsToLayer(container, aBuilder,
1.3280 + this, mFrame,
1.3281 + eCSSProperty_opacity);
1.3282 + return container.forget();
1.3283 +}
1.3284 +
1.3285 +/**
1.3286 + * This doesn't take into account layer scaling --- the layer may be
1.3287 + * rendered at a higher (or lower) resolution, affecting the retained layer
1.3288 + * size --- but this should be good enough.
1.3289 + */
1.3290 +static bool
1.3291 +IsItemTooSmallForActiveLayer(nsDisplayItem* aItem)
1.3292 +{
1.3293 + nsIntRect visibleDevPixels = aItem->GetVisibleRect().ToOutsidePixels(
1.3294 + aItem->Frame()->PresContext()->AppUnitsPerDevPixel());
1.3295 + static const int MIN_ACTIVE_LAYER_SIZE_DEV_PIXELS = 16;
1.3296 + return visibleDevPixels.Size() <
1.3297 + nsIntSize(MIN_ACTIVE_LAYER_SIZE_DEV_PIXELS, MIN_ACTIVE_LAYER_SIZE_DEV_PIXELS);
1.3298 +}
1.3299 +
1.3300 +bool
1.3301 +nsDisplayOpacity::NeedsActiveLayer()
1.3302 +{
1.3303 + if (ActiveLayerTracker::IsStyleAnimated(mFrame, eCSSProperty_opacity) &&
1.3304 + !IsItemTooSmallForActiveLayer(this))
1.3305 + return true;
1.3306 + if (mFrame->GetContent()) {
1.3307 + if (nsLayoutUtils::HasAnimationsForCompositor(mFrame->GetContent(),
1.3308 + eCSSProperty_opacity)) {
1.3309 + return true;
1.3310 + }
1.3311 + }
1.3312 + return false;
1.3313 +}
1.3314 +
1.3315 +bool
1.3316 +nsDisplayOpacity::ShouldFlattenAway(nsDisplayListBuilder* aBuilder)
1.3317 +{
1.3318 + if (NeedsActiveLayer())
1.3319 + return false;
1.3320 +
1.3321 + nsDisplayItem* child = mList.GetBottom();
1.3322 + // Only try folding our opacity down if we have a single
1.3323 + // child. We could potentially do this also if we had multiple
1.3324 + // children as long as they don't overlap.
1.3325 + if (!child || child->GetAbove()) {
1.3326 + return false;
1.3327 + }
1.3328 +
1.3329 + return child->ApplyOpacity(aBuilder, mFrame->StyleDisplay()->mOpacity, mClip);
1.3330 +}
1.3331 +
1.3332 +nsDisplayItem::LayerState
1.3333 +nsDisplayOpacity::GetLayerState(nsDisplayListBuilder* aBuilder,
1.3334 + LayerManager* aManager,
1.3335 + const ContainerLayerParameters& aParameters) {
1.3336 + if (NeedsActiveLayer())
1.3337 + return LAYER_ACTIVE;
1.3338 +
1.3339 + return RequiredLayerStateForChildren(aBuilder, aManager, aParameters, mList,
1.3340 + nsLayoutUtils::GetAnimatedGeometryRootFor(this, aBuilder));
1.3341 +}
1.3342 +
1.3343 +bool
1.3344 +nsDisplayOpacity::ComputeVisibility(nsDisplayListBuilder* aBuilder,
1.3345 + nsRegion* aVisibleRegion,
1.3346 + const nsRect& aAllowVisibleRegionExpansion) {
1.3347 + // Our children are translucent so we should not allow them to subtract
1.3348 + // area from aVisibleRegion. We do need to find out what is visible under
1.3349 + // our children in the temporary compositing buffer, because if our children
1.3350 + // paint our entire bounds opaquely then we don't need an alpha channel in
1.3351 + // the temporary compositing buffer.
1.3352 + nsRect bounds = GetClippedBounds(aBuilder);
1.3353 + nsRegion visibleUnderChildren;
1.3354 + visibleUnderChildren.And(*aVisibleRegion, bounds);
1.3355 + nsRect allowExpansion = bounds.Intersect(aAllowVisibleRegionExpansion);
1.3356 + return
1.3357 + nsDisplayWrapList::ComputeVisibility(aBuilder, &visibleUnderChildren,
1.3358 + allowExpansion);
1.3359 +}
1.3360 +
1.3361 +bool nsDisplayOpacity::TryMerge(nsDisplayListBuilder* aBuilder, nsDisplayItem* aItem) {
1.3362 + if (aItem->GetType() != TYPE_OPACITY)
1.3363 + return false;
1.3364 + // items for the same content element should be merged into a single
1.3365 + // compositing group
1.3366 + // aItem->GetUnderlyingFrame() returns non-null because it's nsDisplayOpacity
1.3367 + if (aItem->Frame()->GetContent() != mFrame->GetContent())
1.3368 + return false;
1.3369 + if (aItem->GetClip() != GetClip())
1.3370 + return false;
1.3371 + MergeFromTrackingMergedFrames(static_cast<nsDisplayOpacity*>(aItem));
1.3372 + return true;
1.3373 +}
1.3374 +
1.3375 +#ifdef MOZ_DUMP_PAINTING
1.3376 +void
1.3377 +nsDisplayOpacity::WriteDebugInfo(nsACString& aTo)
1.3378 +{
1.3379 + aTo += nsPrintfCString(" (opacity %f)", mFrame->StyleDisplay()->mOpacity);
1.3380 +}
1.3381 +#endif
1.3382 +
1.3383 +nsDisplayMixBlendMode::nsDisplayMixBlendMode(nsDisplayListBuilder* aBuilder,
1.3384 + nsIFrame* aFrame, nsDisplayList* aList,
1.3385 + uint32_t aFlags)
1.3386 +: nsDisplayWrapList(aBuilder, aFrame, aList) {
1.3387 + MOZ_COUNT_CTOR(nsDisplayMixBlendMode);
1.3388 +}
1.3389 +
1.3390 +#ifdef NS_BUILD_REFCNT_LOGGING
1.3391 +nsDisplayMixBlendMode::~nsDisplayMixBlendMode() {
1.3392 + MOZ_COUNT_DTOR(nsDisplayMixBlendMode);
1.3393 +}
1.3394 +#endif
1.3395 +
1.3396 +nsRegion nsDisplayMixBlendMode::GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
1.3397 + bool* aSnap) {
1.3398 + *aSnap = false;
1.3399 + // We are never considered opaque
1.3400 + return nsRegion();
1.3401 +}
1.3402 +
1.3403 +// nsDisplayMixBlendMode uses layers for rendering
1.3404 +already_AddRefed<Layer>
1.3405 +nsDisplayMixBlendMode::BuildLayer(nsDisplayListBuilder* aBuilder,
1.3406 + LayerManager* aManager,
1.3407 + const ContainerLayerParameters& aContainerParameters) {
1.3408 + ContainerLayerParameters newContainerParameters = aContainerParameters;
1.3409 + newContainerParameters.mDisableSubpixelAntialiasingInDescendants = true;
1.3410 +
1.3411 + nsRefPtr<Layer> container = aManager->GetLayerBuilder()->
1.3412 + BuildContainerLayerFor(aBuilder, aManager, mFrame, this, mList,
1.3413 + newContainerParameters, nullptr);
1.3414 + if (!container) {
1.3415 + return nullptr;
1.3416 + }
1.3417 +
1.3418 + container->DeprecatedSetMixBlendMode(nsCSSRendering::GetGFXBlendMode(mFrame->StyleDisplay()->mMixBlendMode));
1.3419 +
1.3420 + return container.forget();
1.3421 +}
1.3422 +
1.3423 +bool nsDisplayMixBlendMode::ComputeVisibility(nsDisplayListBuilder* aBuilder,
1.3424 + nsRegion* aVisibleRegion,
1.3425 + const nsRect& aAllowVisibleRegionExpansion) {
1.3426 + // Our children are need their backdrop so we should not allow them to subtract
1.3427 + // area from aVisibleRegion. We do need to find out what is visible under
1.3428 + // our children in the temporary compositing buffer, because if our children
1.3429 + // paint our entire bounds opaquely then we don't need an alpha channel in
1.3430 + // the temporary compositing buffer.
1.3431 + nsRect bounds = GetClippedBounds(aBuilder);
1.3432 + nsRegion visibleUnderChildren;
1.3433 + visibleUnderChildren.And(*aVisibleRegion, bounds);
1.3434 + nsRect allowExpansion = bounds.Intersect(aAllowVisibleRegionExpansion);
1.3435 + return
1.3436 + nsDisplayWrapList::ComputeVisibility(aBuilder, &visibleUnderChildren,
1.3437 + allowExpansion);
1.3438 +}
1.3439 +
1.3440 +bool nsDisplayMixBlendMode::TryMerge(nsDisplayListBuilder* aBuilder, nsDisplayItem* aItem) {
1.3441 + if (aItem->GetType() != TYPE_MIX_BLEND_MODE)
1.3442 + return false;
1.3443 + // items for the same content element should be merged into a single
1.3444 + // compositing group
1.3445 + // aItem->GetUnderlyingFrame() returns non-null because it's nsDisplayOpacity
1.3446 + if (aItem->Frame()->GetContent() != mFrame->GetContent())
1.3447 + return false;
1.3448 + if (aItem->GetClip() != GetClip())
1.3449 + return false;
1.3450 + MergeFromTrackingMergedFrames(static_cast<nsDisplayMixBlendMode*>(aItem));
1.3451 + return true;
1.3452 +}
1.3453 +
1.3454 +nsDisplayBlendContainer::nsDisplayBlendContainer(nsDisplayListBuilder* aBuilder,
1.3455 + nsIFrame* aFrame, nsDisplayList* aList,
1.3456 + uint32_t aFlags)
1.3457 + : nsDisplayWrapList(aBuilder, aFrame, aList) {
1.3458 + MOZ_COUNT_CTOR(nsDisplayBlendContainer);
1.3459 +}
1.3460 +
1.3461 +#ifdef NS_BUILD_REFCNT_LOGGING
1.3462 +nsDisplayBlendContainer::~nsDisplayBlendContainer() {
1.3463 + MOZ_COUNT_DTOR(nsDisplayBlendContainer);
1.3464 +}
1.3465 +#endif
1.3466 +
1.3467 +// nsDisplayBlendContainer uses layers for rendering
1.3468 +already_AddRefed<Layer>
1.3469 +nsDisplayBlendContainer::BuildLayer(nsDisplayListBuilder* aBuilder,
1.3470 + LayerManager* aManager,
1.3471 + const ContainerLayerParameters& aContainerParameters) {
1.3472 + // turn off anti-aliasing in the parent stacking context because it changes
1.3473 + // how the group is initialized.
1.3474 + ContainerLayerParameters newContainerParameters = aContainerParameters;
1.3475 + newContainerParameters.mDisableSubpixelAntialiasingInDescendants = true;
1.3476 +
1.3477 + nsRefPtr<Layer> container = aManager->GetLayerBuilder()->
1.3478 + BuildContainerLayerFor(aBuilder, aManager, mFrame, this, mList,
1.3479 + newContainerParameters, nullptr);
1.3480 + if (!container) {
1.3481 + return nullptr;
1.3482 + }
1.3483 +
1.3484 + container->SetForceIsolatedGroup(true);
1.3485 + return container.forget();
1.3486 +}
1.3487 +
1.3488 +bool nsDisplayBlendContainer::TryMerge(nsDisplayListBuilder* aBuilder, nsDisplayItem* aItem) {
1.3489 + if (aItem->GetType() != TYPE_BLEND_CONTAINER)
1.3490 + return false;
1.3491 + // items for the same content element should be merged into a single
1.3492 + // compositing group
1.3493 + // aItem->GetUnderlyingFrame() returns non-null because it's nsDisplayOpacity
1.3494 + if (aItem->Frame()->GetContent() != mFrame->GetContent())
1.3495 + return false;
1.3496 + if (aItem->GetClip() != GetClip())
1.3497 + return false;
1.3498 + MergeFromTrackingMergedFrames(static_cast<nsDisplayBlendContainer*>(aItem));
1.3499 + return true;
1.3500 +}
1.3501 +
1.3502 +nsDisplayOwnLayer::nsDisplayOwnLayer(nsDisplayListBuilder* aBuilder,
1.3503 + nsIFrame* aFrame, nsDisplayList* aList,
1.3504 + uint32_t aFlags, ViewID aScrollTarget)
1.3505 + : nsDisplayWrapList(aBuilder, aFrame, aList)
1.3506 + , mFlags(aFlags)
1.3507 + , mScrollTarget(aScrollTarget) {
1.3508 + MOZ_COUNT_CTOR(nsDisplayOwnLayer);
1.3509 +}
1.3510 +
1.3511 +#ifdef NS_BUILD_REFCNT_LOGGING
1.3512 +nsDisplayOwnLayer::~nsDisplayOwnLayer() {
1.3513 + MOZ_COUNT_DTOR(nsDisplayOwnLayer);
1.3514 +}
1.3515 +#endif
1.3516 +
1.3517 +// nsDisplayOpacity uses layers for rendering
1.3518 +already_AddRefed<Layer>
1.3519 +nsDisplayOwnLayer::BuildLayer(nsDisplayListBuilder* aBuilder,
1.3520 + LayerManager* aManager,
1.3521 + const ContainerLayerParameters& aContainerParameters) {
1.3522 + nsRefPtr<ContainerLayer> layer = aManager->GetLayerBuilder()->
1.3523 + BuildContainerLayerFor(aBuilder, aManager, mFrame, this, mList,
1.3524 + aContainerParameters, nullptr);
1.3525 + if (mFlags & VERTICAL_SCROLLBAR) {
1.3526 + layer->SetScrollbarData(mScrollTarget, Layer::ScrollDirection::VERTICAL);
1.3527 + }
1.3528 + if (mFlags & HORIZONTAL_SCROLLBAR) {
1.3529 + layer->SetScrollbarData(mScrollTarget, Layer::ScrollDirection::HORIZONTAL);
1.3530 + }
1.3531 +
1.3532 + if (mFlags & GENERATE_SUBDOC_INVALIDATIONS) {
1.3533 + mFrame->PresContext()->SetNotifySubDocInvalidationData(layer);
1.3534 + }
1.3535 + return layer.forget();
1.3536 +}
1.3537 +
1.3538 +nsDisplaySubDocument::nsDisplaySubDocument(nsDisplayListBuilder* aBuilder,
1.3539 + nsIFrame* aFrame, nsDisplayList* aList,
1.3540 + uint32_t aFlags)
1.3541 + : nsDisplayOwnLayer(aBuilder, aFrame, aList, aFlags)
1.3542 + , mScrollParentId(aBuilder->GetCurrentScrollParentId())
1.3543 +{
1.3544 + MOZ_COUNT_CTOR(nsDisplaySubDocument);
1.3545 +}
1.3546 +
1.3547 +#ifdef NS_BUILD_REFCNT_LOGGING
1.3548 +nsDisplaySubDocument::~nsDisplaySubDocument() {
1.3549 + MOZ_COUNT_DTOR(nsDisplaySubDocument);
1.3550 +}
1.3551 +#endif
1.3552 +
1.3553 +already_AddRefed<Layer>
1.3554 +nsDisplaySubDocument::BuildLayer(nsDisplayListBuilder* aBuilder,
1.3555 + LayerManager* aManager,
1.3556 + const ContainerLayerParameters& aContainerParameters) {
1.3557 + nsRefPtr<Layer> layer = nsDisplayOwnLayer::BuildLayer(
1.3558 + aBuilder, aManager, aContainerParameters);
1.3559 +
1.3560 + if (!(mFlags & GENERATE_SCROLLABLE_LAYER)) {
1.3561 + return layer.forget();
1.3562 + }
1.3563 +
1.3564 + NS_ASSERTION(layer->AsContainerLayer(), "nsDisplayOwnLayer should have made a ContainerLayer");
1.3565 + if (ContainerLayer* container = layer->AsContainerLayer()) {
1.3566 + nsPresContext* presContext = mFrame->PresContext();
1.3567 + nsIFrame* rootScrollFrame = presContext->PresShell()->GetRootScrollFrame();
1.3568 + bool isRootContentDocument = presContext->IsRootContentDocument();
1.3569 +
1.3570 + bool usingDisplayport = false;
1.3571 + bool usingCriticalDisplayport = false;
1.3572 + nsRect displayport, criticalDisplayport;
1.3573 + ViewID scrollId = FrameMetrics::NULL_SCROLL_ID;
1.3574 + if (rootScrollFrame) {
1.3575 + nsIContent* content = rootScrollFrame->GetContent();
1.3576 + if (content) {
1.3577 + usingDisplayport = nsLayoutUtils::GetDisplayPort(content, &displayport);
1.3578 + usingCriticalDisplayport =
1.3579 + nsLayoutUtils::GetCriticalDisplayPort(content, &criticalDisplayport);
1.3580 +
1.3581 + if (isRootContentDocument) {
1.3582 + scrollId = nsLayoutUtils::FindOrCreateIDFor(content);
1.3583 + } else {
1.3584 + nsLayoutUtils::FindIDFor(content, &scrollId);
1.3585 + }
1.3586 + }
1.3587 + }
1.3588 +
1.3589 + nsRect viewport = mFrame->GetRect() -
1.3590 + mFrame->GetPosition() +
1.3591 + mFrame->GetOffsetToCrossDoc(ReferenceFrame());
1.3592 +
1.3593 + container->SetScrollHandoffParentId(mScrollParentId);
1.3594 + RecordFrameMetrics(mFrame, rootScrollFrame, ReferenceFrame(),
1.3595 + container, mList.GetVisibleRect(), viewport,
1.3596 + (usingDisplayport ? &displayport : nullptr),
1.3597 + (usingCriticalDisplayport ? &criticalDisplayport : nullptr),
1.3598 + scrollId, isRootContentDocument, aContainerParameters);
1.3599 + }
1.3600 +
1.3601 + return layer.forget();
1.3602 +}
1.3603 +
1.3604 +nsRect
1.3605 +nsDisplaySubDocument::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap)
1.3606 +{
1.3607 + bool usingDisplayPort =
1.3608 + nsLayoutUtils::ViewportHasDisplayPort(mFrame->PresContext());
1.3609 +
1.3610 + if ((mFlags & GENERATE_SCROLLABLE_LAYER) && usingDisplayPort) {
1.3611 + *aSnap = false;
1.3612 + return mFrame->GetRect() + aBuilder->ToReferenceFrame(mFrame);
1.3613 + }
1.3614 +
1.3615 + return nsDisplayOwnLayer::GetBounds(aBuilder, aSnap);
1.3616 +}
1.3617 +
1.3618 +bool
1.3619 +nsDisplaySubDocument::ComputeVisibility(nsDisplayListBuilder* aBuilder,
1.3620 + nsRegion* aVisibleRegion,
1.3621 + const nsRect& aAllowVisibleRegionExpansion)
1.3622 +{
1.3623 + nsRect displayport;
1.3624 + bool usingDisplayPort =
1.3625 + nsLayoutUtils::ViewportHasDisplayPort(mFrame->PresContext(), &displayport);
1.3626 +
1.3627 + if (!(mFlags & GENERATE_SCROLLABLE_LAYER) || !usingDisplayPort) {
1.3628 + return nsDisplayWrapList::ComputeVisibility(aBuilder, aVisibleRegion,
1.3629 + aAllowVisibleRegionExpansion);
1.3630 + }
1.3631 +
1.3632 + nsRegion childVisibleRegion;
1.3633 + // The visible region for the children may be much bigger than the hole we
1.3634 + // are viewing the children from, so that the compositor process has enough
1.3635 + // content to asynchronously pan while content is being refreshed.
1.3636 + childVisibleRegion = displayport + mFrame->GetOffsetToCrossDoc(ReferenceFrame());
1.3637 +
1.3638 + nsRect boundedRect =
1.3639 + childVisibleRegion.GetBounds().Intersect(mList.GetBounds(aBuilder));
1.3640 + nsRect allowExpansion = boundedRect.Intersect(aAllowVisibleRegionExpansion);
1.3641 + bool visible = mList.ComputeVisibilityForSublist(
1.3642 + aBuilder, &childVisibleRegion, boundedRect, allowExpansion,
1.3643 + usingDisplayPort ? mFrame : nullptr);
1.3644 + // We don't allow this computation to influence aVisibleRegion, on the
1.3645 + // assumption that the layer can be asynchronously scrolled so we'll
1.3646 + // definitely need all the content under it.
1.3647 +
1.3648 + return visible;
1.3649 +}
1.3650 +
1.3651 +bool
1.3652 +nsDisplaySubDocument::ShouldBuildLayerEvenIfInvisible(nsDisplayListBuilder* aBuilder)
1.3653 +{
1.3654 + bool usingDisplayPort =
1.3655 + nsLayoutUtils::ViewportHasDisplayPort(mFrame->PresContext());
1.3656 +
1.3657 + if ((mFlags & GENERATE_SCROLLABLE_LAYER) && usingDisplayPort) {
1.3658 + return true;
1.3659 + }
1.3660 +
1.3661 + return nsDisplayOwnLayer::ShouldBuildLayerEvenIfInvisible(aBuilder);
1.3662 +}
1.3663 +
1.3664 +nsRegion
1.3665 +nsDisplaySubDocument::GetOpaqueRegion(nsDisplayListBuilder* aBuilder, bool* aSnap)
1.3666 +{
1.3667 + bool usingDisplayPort =
1.3668 + nsLayoutUtils::ViewportHasDisplayPort(mFrame->PresContext());
1.3669 +
1.3670 + if ((mFlags & GENERATE_SCROLLABLE_LAYER) && usingDisplayPort) {
1.3671 + *aSnap = false;
1.3672 + return nsRegion();
1.3673 + }
1.3674 +
1.3675 + return nsDisplayOwnLayer::GetOpaqueRegion(aBuilder, aSnap);
1.3676 +}
1.3677 +
1.3678 +nsDisplayResolution::nsDisplayResolution(nsDisplayListBuilder* aBuilder,
1.3679 + nsIFrame* aFrame, nsDisplayList* aList,
1.3680 + uint32_t aFlags)
1.3681 + : nsDisplaySubDocument(aBuilder, aFrame, aList, aFlags) {
1.3682 + MOZ_COUNT_CTOR(nsDisplayResolution);
1.3683 +}
1.3684 +
1.3685 +#ifdef NS_BUILD_REFCNT_LOGGING
1.3686 +nsDisplayResolution::~nsDisplayResolution() {
1.3687 + MOZ_COUNT_DTOR(nsDisplayResolution);
1.3688 +}
1.3689 +#endif
1.3690 +
1.3691 +already_AddRefed<Layer>
1.3692 +nsDisplayResolution::BuildLayer(nsDisplayListBuilder* aBuilder,
1.3693 + LayerManager* aManager,
1.3694 + const ContainerLayerParameters& aContainerParameters) {
1.3695 + nsIPresShell* presShell = mFrame->PresContext()->PresShell();
1.3696 + ContainerLayerParameters containerParameters(
1.3697 + presShell->GetXResolution(), presShell->GetYResolution(), nsIntPoint(),
1.3698 + aContainerParameters);
1.3699 +
1.3700 + nsRefPtr<Layer> layer = nsDisplaySubDocument::BuildLayer(
1.3701 + aBuilder, aManager, containerParameters);
1.3702 + layer->SetPostScale(1.0f / presShell->GetXResolution(),
1.3703 + 1.0f / presShell->GetYResolution());
1.3704 + return layer.forget();
1.3705 +}
1.3706 +
1.3707 +nsDisplayStickyPosition::nsDisplayStickyPosition(nsDisplayListBuilder* aBuilder,
1.3708 + nsIFrame* aFrame,
1.3709 + nsDisplayList* aList)
1.3710 + : nsDisplayOwnLayer(aBuilder, aFrame, aList)
1.3711 +{
1.3712 + MOZ_COUNT_CTOR(nsDisplayStickyPosition);
1.3713 +}
1.3714 +
1.3715 +#ifdef NS_BUILD_REFCNT_LOGGING
1.3716 +nsDisplayStickyPosition::~nsDisplayStickyPosition() {
1.3717 + MOZ_COUNT_DTOR(nsDisplayStickyPosition);
1.3718 +}
1.3719 +#endif
1.3720 +
1.3721 +already_AddRefed<Layer>
1.3722 +nsDisplayStickyPosition::BuildLayer(nsDisplayListBuilder* aBuilder,
1.3723 + LayerManager* aManager,
1.3724 + const ContainerLayerParameters& aContainerParameters) {
1.3725 + nsRefPtr<Layer> layer =
1.3726 + nsDisplayOwnLayer::BuildLayer(aBuilder, aManager, aContainerParameters);
1.3727 +
1.3728 + StickyScrollContainer* stickyScrollContainer = StickyScrollContainer::
1.3729 + GetStickyScrollContainerForFrame(mFrame);
1.3730 + if (!stickyScrollContainer) {
1.3731 + return layer.forget();
1.3732 + }
1.3733 +
1.3734 + nsIFrame* scrollFrame = do_QueryFrame(stickyScrollContainer->ScrollFrame());
1.3735 + nsPresContext* presContext = scrollFrame->PresContext();
1.3736 +
1.3737 + // Sticky position frames whose scroll frame is the root scroll frame are
1.3738 + // reflowed into the scroll-port size if one has been set.
1.3739 + nsSize scrollFrameSize = scrollFrame->GetSize();
1.3740 + if (scrollFrame == presContext->PresShell()->GetRootScrollFrame() &&
1.3741 + presContext->PresShell()->IsScrollPositionClampingScrollPortSizeSet()) {
1.3742 + scrollFrameSize = presContext->PresShell()->
1.3743 + GetScrollPositionClampingScrollPortSize();
1.3744 + }
1.3745 +
1.3746 + nsLayoutUtils::SetFixedPositionLayerData(layer, scrollFrame,
1.3747 + nsRect(scrollFrame->GetOffsetToCrossDoc(ReferenceFrame()), scrollFrameSize),
1.3748 + mFrame, presContext, aContainerParameters);
1.3749 +
1.3750 + ViewID scrollId = nsLayoutUtils::FindOrCreateIDFor(
1.3751 + stickyScrollContainer->ScrollFrame()->GetScrolledFrame()->GetContent());
1.3752 +
1.3753 + float factor = presContext->AppUnitsPerDevPixel();
1.3754 + nsRect outer;
1.3755 + nsRect inner;
1.3756 + stickyScrollContainer->GetScrollRanges(mFrame, &outer, &inner);
1.3757 + LayerRect stickyOuter(NSAppUnitsToFloatPixels(outer.x, factor) *
1.3758 + aContainerParameters.mXScale,
1.3759 + NSAppUnitsToFloatPixels(outer.y, factor) *
1.3760 + aContainerParameters.mYScale,
1.3761 + NSAppUnitsToFloatPixels(outer.width, factor) *
1.3762 + aContainerParameters.mXScale,
1.3763 + NSAppUnitsToFloatPixels(outer.height, factor) *
1.3764 + aContainerParameters.mYScale);
1.3765 + LayerRect stickyInner(NSAppUnitsToFloatPixels(inner.x, factor) *
1.3766 + aContainerParameters.mXScale,
1.3767 + NSAppUnitsToFloatPixels(inner.y, factor) *
1.3768 + aContainerParameters.mYScale,
1.3769 + NSAppUnitsToFloatPixels(inner.width, factor) *
1.3770 + aContainerParameters.mXScale,
1.3771 + NSAppUnitsToFloatPixels(inner.height, factor) *
1.3772 + aContainerParameters.mYScale);
1.3773 + layer->SetStickyPositionData(scrollId, stickyOuter, stickyInner);
1.3774 +
1.3775 + return layer.forget();
1.3776 +}
1.3777 +
1.3778 +bool nsDisplayStickyPosition::TryMerge(nsDisplayListBuilder* aBuilder, nsDisplayItem* aItem) {
1.3779 + if (aItem->GetType() != TYPE_STICKY_POSITION)
1.3780 + return false;
1.3781 + // Items with the same fixed position frame can be merged.
1.3782 + nsDisplayStickyPosition* other = static_cast<nsDisplayStickyPosition*>(aItem);
1.3783 + if (other->mFrame != mFrame)
1.3784 + return false;
1.3785 + if (aItem->GetClip() != GetClip())
1.3786 + return false;
1.3787 + MergeFromTrackingMergedFrames(other);
1.3788 + return true;
1.3789 +}
1.3790 +
1.3791 +nsDisplayScrollLayer::nsDisplayScrollLayer(nsDisplayListBuilder* aBuilder,
1.3792 + nsDisplayList* aList,
1.3793 + nsIFrame* aForFrame,
1.3794 + nsIFrame* aScrolledFrame,
1.3795 + nsIFrame* aScrollFrame)
1.3796 + : nsDisplayWrapList(aBuilder, aForFrame, aList)
1.3797 + , mScrollFrame(aScrollFrame)
1.3798 + , mScrolledFrame(aScrolledFrame)
1.3799 + , mScrollParentId(aBuilder->GetCurrentScrollParentId())
1.3800 +{
1.3801 +#ifdef NS_BUILD_REFCNT_LOGGING
1.3802 + MOZ_COUNT_CTOR(nsDisplayScrollLayer);
1.3803 +#endif
1.3804 +
1.3805 + NS_ASSERTION(mScrolledFrame && mScrolledFrame->GetContent(),
1.3806 + "Need a child frame with content");
1.3807 +}
1.3808 +
1.3809 +nsDisplayScrollLayer::nsDisplayScrollLayer(nsDisplayListBuilder* aBuilder,
1.3810 + nsDisplayItem* aItem,
1.3811 + nsIFrame* aForFrame,
1.3812 + nsIFrame* aScrolledFrame,
1.3813 + nsIFrame* aScrollFrame)
1.3814 + : nsDisplayWrapList(aBuilder, aForFrame, aItem)
1.3815 + , mScrollFrame(aScrollFrame)
1.3816 + , mScrolledFrame(aScrolledFrame)
1.3817 + , mScrollParentId(aBuilder->GetCurrentScrollParentId())
1.3818 +{
1.3819 +#ifdef NS_BUILD_REFCNT_LOGGING
1.3820 + MOZ_COUNT_CTOR(nsDisplayScrollLayer);
1.3821 +#endif
1.3822 +
1.3823 + NS_ASSERTION(mScrolledFrame && mScrolledFrame->GetContent(),
1.3824 + "Need a child frame with content");
1.3825 +}
1.3826 +
1.3827 +nsDisplayScrollLayer::nsDisplayScrollLayer(nsDisplayListBuilder* aBuilder,
1.3828 + nsIFrame* aForFrame,
1.3829 + nsIFrame* aScrolledFrame,
1.3830 + nsIFrame* aScrollFrame)
1.3831 + : nsDisplayWrapList(aBuilder, aForFrame)
1.3832 + , mScrollFrame(aScrollFrame)
1.3833 + , mScrolledFrame(aScrolledFrame)
1.3834 + , mScrollParentId(aBuilder->GetCurrentScrollParentId())
1.3835 +{
1.3836 +#ifdef NS_BUILD_REFCNT_LOGGING
1.3837 + MOZ_COUNT_CTOR(nsDisplayScrollLayer);
1.3838 +#endif
1.3839 +
1.3840 + NS_ASSERTION(mScrolledFrame && mScrolledFrame->GetContent(),
1.3841 + "Need a child frame with content");
1.3842 +}
1.3843 +
1.3844 +#ifdef NS_BUILD_REFCNT_LOGGING
1.3845 +nsDisplayScrollLayer::~nsDisplayScrollLayer()
1.3846 +{
1.3847 + MOZ_COUNT_DTOR(nsDisplayScrollLayer);
1.3848 +}
1.3849 +#endif
1.3850 +
1.3851 +nsRect
1.3852 +nsDisplayScrollLayer::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap)
1.3853 +{
1.3854 + nsIScrollableFrame* sf = do_QueryFrame(mScrollFrame);
1.3855 + if (sf) {
1.3856 + *aSnap = false;
1.3857 + return sf->GetScrollPortRect() + aBuilder->ToReferenceFrame(mScrollFrame);
1.3858 + }
1.3859 + return nsDisplayWrapList::GetBounds(aBuilder, aSnap);
1.3860 +}
1.3861 +
1.3862 +already_AddRefed<Layer>
1.3863 +nsDisplayScrollLayer::BuildLayer(nsDisplayListBuilder* aBuilder,
1.3864 + LayerManager* aManager,
1.3865 + const ContainerLayerParameters& aContainerParameters) {
1.3866 + nsRefPtr<ContainerLayer> layer = aManager->GetLayerBuilder()->
1.3867 + BuildContainerLayerFor(aBuilder, aManager, mFrame, this, mList,
1.3868 + aContainerParameters, nullptr);
1.3869 +
1.3870 + // Get the already set unique ID for scrolling this content remotely.
1.3871 + // Or, if not set, generate a new ID.
1.3872 + nsIContent* content = mScrolledFrame->GetContent();
1.3873 + ViewID scrollId = nsLayoutUtils::FindOrCreateIDFor(content);
1.3874 +
1.3875 + nsRect viewport = mScrollFrame->GetRect() -
1.3876 + mScrollFrame->GetPosition() +
1.3877 + mScrollFrame->GetOffsetToCrossDoc(ReferenceFrame());
1.3878 +
1.3879 + bool usingDisplayport = false;
1.3880 + bool usingCriticalDisplayport = false;
1.3881 + nsRect displayport, criticalDisplayport;
1.3882 + if (content) {
1.3883 + usingDisplayport = nsLayoutUtils::GetDisplayPort(content, &displayport);
1.3884 + usingCriticalDisplayport =
1.3885 + nsLayoutUtils::GetCriticalDisplayPort(content, &criticalDisplayport);
1.3886 + }
1.3887 + layer->SetScrollHandoffParentId(mScrollParentId);
1.3888 + RecordFrameMetrics(mScrolledFrame, mScrollFrame, ReferenceFrame(), layer,
1.3889 + mList.GetVisibleRect(), viewport,
1.3890 + (usingDisplayport ? &displayport : nullptr),
1.3891 + (usingCriticalDisplayport ? &criticalDisplayport : nullptr),
1.3892 + scrollId, false, aContainerParameters);
1.3893 +
1.3894 + return layer.forget();
1.3895 +}
1.3896 +
1.3897 +bool
1.3898 +nsDisplayScrollLayer::ShouldBuildLayerEvenIfInvisible(nsDisplayListBuilder* aBuilder)
1.3899 +{
1.3900 + if (nsLayoutUtils::GetDisplayPort(mScrolledFrame->GetContent(), nullptr)) {
1.3901 + return true;
1.3902 + }
1.3903 +
1.3904 + return nsDisplayWrapList::ShouldBuildLayerEvenIfInvisible(aBuilder);
1.3905 +}
1.3906 +
1.3907 +bool
1.3908 +nsDisplayScrollLayer::ComputeVisibility(nsDisplayListBuilder* aBuilder,
1.3909 + nsRegion* aVisibleRegion,
1.3910 + const nsRect& aAllowVisibleRegionExpansion)
1.3911 +{
1.3912 + nsRect displayport;
1.3913 + bool usingDisplayPort =
1.3914 + nsLayoutUtils::GetDisplayPort(mScrolledFrame->GetContent(), &displayport);
1.3915 + nsRegion childVisibleRegion;
1.3916 + if (usingDisplayPort) {
1.3917 + // The visible region for the children may be much bigger than the hole we
1.3918 + // are viewing the children from, so that the compositor process has enough
1.3919 + // content to asynchronously pan while content is being refreshed.
1.3920 + childVisibleRegion = displayport + mScrollFrame->GetOffsetToCrossDoc(ReferenceFrame());
1.3921 + } else {
1.3922 + bool snap;
1.3923 + childVisibleRegion = GetBounds(aBuilder, &snap);
1.3924 + }
1.3925 +
1.3926 + nsRect boundedRect =
1.3927 + childVisibleRegion.GetBounds().Intersect(mList.GetBounds(aBuilder));
1.3928 + nsRect allowExpansion = boundedRect.Intersect(aAllowVisibleRegionExpansion);
1.3929 + bool visible = mList.ComputeVisibilityForSublist(
1.3930 + aBuilder, &childVisibleRegion, boundedRect, allowExpansion,
1.3931 + usingDisplayPort ? mScrollFrame : nullptr);
1.3932 + // We don't allow this computation to influence aVisibleRegion, on the
1.3933 + // assumption that the layer can be asynchronously scrolled so we'll
1.3934 + // definitely need all the content under it.
1.3935 +
1.3936 + return visible;
1.3937 +}
1.3938 +
1.3939 +LayerState
1.3940 +nsDisplayScrollLayer::GetLayerState(nsDisplayListBuilder* aBuilder,
1.3941 + LayerManager* aManager,
1.3942 + const ContainerLayerParameters& aParameters)
1.3943 +{
1.3944 + // Force this as a layer so we can scroll asynchronously.
1.3945 + // This causes incorrect rendering for rounded clips!
1.3946 + return LAYER_ACTIVE_FORCE;
1.3947 +}
1.3948 +
1.3949 +// Check if we are going to clip an abs pos item that we don't contain.
1.3950 +// Root scroll frames clip all their descendants, so we don't need to worry
1.3951 +// about them.
1.3952 +bool
1.3953 +WouldCauseIncorrectClippingOnAbsPosItem(nsDisplayListBuilder* aBuilder,
1.3954 + nsDisplayScrollLayer* aItem)
1.3955 +{
1.3956 + nsIFrame* scrollFrame = aItem->GetScrollFrame();
1.3957 + nsIPresShell* presShell = scrollFrame->PresContext()->PresShell();
1.3958 + if (scrollFrame == presShell->GetRootScrollFrame()) {
1.3959 + return false;
1.3960 + }
1.3961 + nsIFrame* scrolledFrame = aItem->GetScrolledFrame();
1.3962 + nsIFrame* frame = aItem->Frame();
1.3963 + if (frame == scrolledFrame || !frame->IsAbsolutelyPositioned() ||
1.3964 + nsLayoutUtils::IsAncestorFrameCrossDoc(scrollFrame, frame, presShell->GetRootFrame())) {
1.3965 + return false;
1.3966 + }
1.3967 + if (!aItem->GetClip().IsRectAffectedByClip(aItem->GetChildren()->GetBounds(aBuilder))) {
1.3968 + return false;
1.3969 + }
1.3970 + return true;
1.3971 +}
1.3972 +
1.3973 +bool
1.3974 +nsDisplayScrollLayer::TryMerge(nsDisplayListBuilder* aBuilder,
1.3975 + nsDisplayItem* aItem)
1.3976 +{
1.3977 + if (aItem->GetType() != TYPE_SCROLL_LAYER) {
1.3978 + return false;
1.3979 + }
1.3980 + nsDisplayScrollLayer* other = static_cast<nsDisplayScrollLayer*>(aItem);
1.3981 + if (other->mScrolledFrame != this->mScrolledFrame) {
1.3982 + return false;
1.3983 + }
1.3984 + if (aItem->GetClip() != GetClip()) {
1.3985 + return false;
1.3986 + }
1.3987 +
1.3988 + if (WouldCauseIncorrectClippingOnAbsPosItem(aBuilder, this) ||
1.3989 + WouldCauseIncorrectClippingOnAbsPosItem(aBuilder, other)) {
1.3990 + return false;
1.3991 + }
1.3992 +
1.3993 + NS_ASSERTION(other->mReferenceFrame == mReferenceFrame,
1.3994 + "Must have the same reference frame!");
1.3995 +
1.3996 + FrameProperties props = mScrolledFrame->Properties();
1.3997 + props.Set(nsIFrame::ScrollLayerCount(),
1.3998 + reinterpret_cast<void*>(GetScrollLayerCount() - 1));
1.3999 +
1.4000 + // Swap frames with the other item before doing MergeFrom.
1.4001 + // XXX - This ensures that the frame associated with a scroll layer after
1.4002 + // merging is the first, rather than the last. This tends to change less,
1.4003 + // ensuring we're more likely to retain the associated gfx layer.
1.4004 + // See Bug 729534 and Bug 731641.
1.4005 + nsIFrame* tmp = mFrame;
1.4006 + mFrame = other->mFrame;
1.4007 + other->mFrame = tmp;
1.4008 + MergeFromTrackingMergedFrames(other);
1.4009 + return true;
1.4010 +}
1.4011 +
1.4012 +void
1.4013 +PropagateClip(nsDisplayListBuilder* aBuilder, const DisplayItemClip& aClip,
1.4014 + nsDisplayList* aList)
1.4015 +{
1.4016 + for (nsDisplayItem* i = aList->GetBottom(); i != nullptr; i = i->GetAbove()) {
1.4017 + DisplayItemClip clip(i->GetClip());
1.4018 + clip.IntersectWith(aClip);
1.4019 + i->SetClip(aBuilder, clip);
1.4020 + nsDisplayList* list = i->GetSameCoordinateSystemChildren();
1.4021 + if (list) {
1.4022 + PropagateClip(aBuilder, aClip, list);
1.4023 + }
1.4024 + }
1.4025 +}
1.4026 +
1.4027 +bool
1.4028 +nsDisplayScrollLayer::ShouldFlattenAway(nsDisplayListBuilder* aBuilder)
1.4029 +{
1.4030 + bool badAbsPosClip = WouldCauseIncorrectClippingOnAbsPosItem(aBuilder, this);
1.4031 + if (GetScrollLayerCount() > 1 || badAbsPosClip) {
1.4032 + // Propagate our clip to our children. The clip for the scroll frame is
1.4033 + // on this item, but not our child items so that they can draw non-visible
1.4034 + // parts of the display port. But if we are flattening we failed and can't
1.4035 + // draw the extra content, so it needs to be clipped.
1.4036 + // But don't induce our clip on abs pos frames that we shouldn't be clipping.
1.4037 + if (!badAbsPosClip) {
1.4038 + PropagateClip(aBuilder, GetClip(), &mList);
1.4039 + }
1.4040 + return true;
1.4041 + }
1.4042 + if (mFrame != mScrolledFrame) {
1.4043 + mMergedFrames.AppendElement(mFrame);
1.4044 + mFrame = mScrolledFrame;
1.4045 + }
1.4046 + return false;
1.4047 +}
1.4048 +
1.4049 +intptr_t
1.4050 +nsDisplayScrollLayer::GetScrollLayerCount()
1.4051 +{
1.4052 + FrameProperties props = mScrolledFrame->Properties();
1.4053 +#ifdef DEBUG
1.4054 + bool hasCount = false;
1.4055 + intptr_t result = reinterpret_cast<intptr_t>(
1.4056 + props.Get(nsIFrame::ScrollLayerCount(), &hasCount));
1.4057 + // If this aborts, then the property was either not added before scroll
1.4058 + // layers were created or the property was deleted to early. If the latter,
1.4059 + // make sure that nsDisplayScrollInfoLayer is on the bottom of the list so
1.4060 + // that it is processed last.
1.4061 + NS_ABORT_IF_FALSE(hasCount, "nsDisplayScrollLayer should always be defined");
1.4062 + return result;
1.4063 +#else
1.4064 + return reinterpret_cast<intptr_t>(props.Get(nsIFrame::ScrollLayerCount()));
1.4065 +#endif
1.4066 +}
1.4067 +
1.4068 +#ifdef MOZ_DUMP_PAINTING
1.4069 +void
1.4070 +nsDisplayScrollLayer::WriteDebugInfo(nsACString& aTo)
1.4071 +{
1.4072 + aTo += nsPrintfCString(" (scrollframe %p scrolledframe %p)",
1.4073 + mScrollFrame, mScrolledFrame);
1.4074 +}
1.4075 +#endif
1.4076 +
1.4077 +nsDisplayScrollInfoLayer::nsDisplayScrollInfoLayer(
1.4078 + nsDisplayListBuilder* aBuilder,
1.4079 + nsIFrame* aScrolledFrame,
1.4080 + nsIFrame* aScrollFrame)
1.4081 + : nsDisplayScrollLayer(aBuilder, aScrollFrame, aScrolledFrame, aScrollFrame)
1.4082 +{
1.4083 +#ifdef NS_BUILD_REFCNT_LOGGING
1.4084 + MOZ_COUNT_CTOR(nsDisplayScrollInfoLayer);
1.4085 +#endif
1.4086 +}
1.4087 +
1.4088 +nsDisplayScrollInfoLayer::~nsDisplayScrollInfoLayer()
1.4089 +{
1.4090 + FrameProperties props = mScrolledFrame->Properties();
1.4091 + props.Remove(nsIFrame::ScrollLayerCount());
1.4092 + MOZ_COUNT_DTOR(nsDisplayScrollInfoLayer);
1.4093 +}
1.4094 +
1.4095 +nsRect
1.4096 +nsDisplayScrollInfoLayer::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap)
1.4097 +{
1.4098 + return nsDisplayWrapList::GetBounds(aBuilder, aSnap);
1.4099 +}
1.4100 +
1.4101 +LayerState
1.4102 +nsDisplayScrollInfoLayer::GetLayerState(nsDisplayListBuilder* aBuilder,
1.4103 + LayerManager* aManager,
1.4104 + const ContainerLayerParameters& aParameters)
1.4105 +{
1.4106 + return LAYER_ACTIVE_EMPTY;
1.4107 +}
1.4108 +
1.4109 +bool
1.4110 +nsDisplayScrollInfoLayer::TryMerge(nsDisplayListBuilder* aBuilder,
1.4111 + nsDisplayItem* aItem)
1.4112 +{
1.4113 + return false;
1.4114 +}
1.4115 +
1.4116 +bool
1.4117 +nsDisplayScrollInfoLayer::ShouldFlattenAway(nsDisplayListBuilder* aBuilder)
1.4118 +{
1.4119 + // Layer metadata for a particular scroll frame needs to be unique. Only
1.4120 + // one nsDisplayScrollLayer (with rendered content) or one
1.4121 + // nsDisplayScrollInfoLayer (with only the metadata) should survive the
1.4122 + // visibility computation.
1.4123 + return GetScrollLayerCount() == 1;
1.4124 +}
1.4125 +
1.4126 +nsDisplayZoom::nsDisplayZoom(nsDisplayListBuilder* aBuilder,
1.4127 + nsIFrame* aFrame, nsDisplayList* aList,
1.4128 + int32_t aAPD, int32_t aParentAPD,
1.4129 + uint32_t aFlags)
1.4130 + : nsDisplaySubDocument(aBuilder, aFrame, aList, aFlags)
1.4131 + , mAPD(aAPD), mParentAPD(aParentAPD) {
1.4132 + MOZ_COUNT_CTOR(nsDisplayZoom);
1.4133 +}
1.4134 +
1.4135 +#ifdef NS_BUILD_REFCNT_LOGGING
1.4136 +nsDisplayZoom::~nsDisplayZoom() {
1.4137 + MOZ_COUNT_DTOR(nsDisplayZoom);
1.4138 +}
1.4139 +#endif
1.4140 +
1.4141 +nsRect nsDisplayZoom::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap)
1.4142 +{
1.4143 + nsRect bounds = nsDisplaySubDocument::GetBounds(aBuilder, aSnap);
1.4144 + *aSnap = false;
1.4145 + return bounds.ConvertAppUnitsRoundOut(mAPD, mParentAPD);
1.4146 +}
1.4147 +
1.4148 +void nsDisplayZoom::HitTest(nsDisplayListBuilder *aBuilder,
1.4149 + const nsRect& aRect,
1.4150 + HitTestState *aState,
1.4151 + nsTArray<nsIFrame*> *aOutFrames)
1.4152 +{
1.4153 + nsRect rect;
1.4154 + // A 1x1 rect indicates we are just hit testing a point, so pass down a 1x1
1.4155 + // rect as well instead of possibly rounding the width or height to zero.
1.4156 + if (aRect.width == 1 && aRect.height == 1) {
1.4157 + rect.MoveTo(aRect.TopLeft().ConvertAppUnits(mParentAPD, mAPD));
1.4158 + rect.width = rect.height = 1;
1.4159 + } else {
1.4160 + rect = aRect.ConvertAppUnitsRoundOut(mParentAPD, mAPD);
1.4161 + }
1.4162 + mList.HitTest(aBuilder, rect, aState, aOutFrames);
1.4163 +}
1.4164 +
1.4165 +void nsDisplayZoom::Paint(nsDisplayListBuilder* aBuilder,
1.4166 + nsRenderingContext* aCtx)
1.4167 +{
1.4168 + mList.PaintForFrame(aBuilder, aCtx, mFrame, nsDisplayList::PAINT_DEFAULT);
1.4169 +}
1.4170 +
1.4171 +bool nsDisplayZoom::ComputeVisibility(nsDisplayListBuilder *aBuilder,
1.4172 + nsRegion *aVisibleRegion,
1.4173 + const nsRect& aAllowVisibleRegionExpansion)
1.4174 +{
1.4175 + // Convert the passed in visible region to our appunits.
1.4176 + nsRegion visibleRegion;
1.4177 + // mVisibleRect has been clipped to GetClippedBounds
1.4178 + visibleRegion.And(*aVisibleRegion, mVisibleRect);
1.4179 + visibleRegion = visibleRegion.ConvertAppUnitsRoundOut(mParentAPD, mAPD);
1.4180 + nsRegion originalVisibleRegion = visibleRegion;
1.4181 +
1.4182 + nsRect transformedVisibleRect =
1.4183 + mVisibleRect.ConvertAppUnitsRoundOut(mParentAPD, mAPD);
1.4184 + nsRect allowExpansion =
1.4185 + aAllowVisibleRegionExpansion.ConvertAppUnitsRoundIn(mParentAPD, mAPD);
1.4186 + bool retval;
1.4187 + // If we are to generate a scrollable layer we call
1.4188 + // nsDisplaySubDocument::ComputeVisibility to make the necessary adjustments
1.4189 + // for ComputeVisibility, it does all it's calculations in the child APD.
1.4190 + bool usingDisplayPort =
1.4191 + nsLayoutUtils::ViewportHasDisplayPort(mFrame->PresContext());
1.4192 + if (!(mFlags & GENERATE_SCROLLABLE_LAYER) || !usingDisplayPort) {
1.4193 + retval =
1.4194 + mList.ComputeVisibilityForSublist(aBuilder, &visibleRegion,
1.4195 + transformedVisibleRect,
1.4196 + allowExpansion);
1.4197 + } else {
1.4198 + retval =
1.4199 + nsDisplaySubDocument::ComputeVisibility(aBuilder, &visibleRegion,
1.4200 + allowExpansion);
1.4201 + }
1.4202 +
1.4203 + nsRegion removed;
1.4204 + // removed = originalVisibleRegion - visibleRegion
1.4205 + removed.Sub(originalVisibleRegion, visibleRegion);
1.4206 + // Convert removed region to parent appunits.
1.4207 + removed = removed.ConvertAppUnitsRoundIn(mAPD, mParentAPD);
1.4208 + // aVisibleRegion = aVisibleRegion - removed (modulo any simplifications
1.4209 + // SubtractFromVisibleRegion does)
1.4210 + aBuilder->SubtractFromVisibleRegion(aVisibleRegion, removed);
1.4211 +
1.4212 + return retval;
1.4213 +}
1.4214 +
1.4215 +///////////////////////////////////////////////////
1.4216 +// nsDisplayTransform Implementation
1.4217 +//
1.4218 +
1.4219 +// Write #define UNIFIED_CONTINUATIONS here to have the transform property try
1.4220 +// to transform content with continuations as one unified block instead of
1.4221 +// several smaller ones. This is currently disabled because it doesn't work
1.4222 +// correctly, since when the frames are initially being reflowed, their
1.4223 +// continuations all compute their bounding rects independently of each other
1.4224 +// and consequently get the wrong value. Write #define DEBUG_HIT here to have
1.4225 +// the nsDisplayTransform class dump out a bunch of information about hit
1.4226 +// detection.
1.4227 +#undef UNIFIED_CONTINUATIONS
1.4228 +#undef DEBUG_HIT
1.4229 +
1.4230 +/* Returns the bounds of a frame as defined for transforms. If
1.4231 + * UNIFIED_CONTINUATIONS is not defined, this is simply the frame's bounding
1.4232 + * rectangle, translated to the origin. Otherwise, returns the smallest
1.4233 + * rectangle containing a frame and all of its continuations. For example, if
1.4234 + * there is a <span> element with several continuations split over several
1.4235 + * lines, this function will return the rectangle containing all of those
1.4236 + * continuations. This rectangle is relative to the origin of the frame's local
1.4237 + * coordinate space.
1.4238 + */
1.4239 +#ifndef UNIFIED_CONTINUATIONS
1.4240 +
1.4241 +nsRect
1.4242 +nsDisplayTransform::GetFrameBoundsForTransform(const nsIFrame* aFrame)
1.4243 +{
1.4244 + NS_PRECONDITION(aFrame, "Can't get the bounds of a nonexistent frame!");
1.4245 +
1.4246 + if (aFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT) {
1.4247 + // TODO: SVG needs to define what percentage translations resolve against.
1.4248 + return nsRect();
1.4249 + }
1.4250 +
1.4251 + return nsRect(nsPoint(0, 0), aFrame->GetSize());
1.4252 +}
1.4253 +
1.4254 +#else
1.4255 +
1.4256 +nsRect
1.4257 +nsDisplayTransform::GetFrameBoundsForTransform(const nsIFrame* aFrame)
1.4258 +{
1.4259 + NS_PRECONDITION(aFrame, "Can't get the bounds of a nonexistent frame!");
1.4260 +
1.4261 + nsRect result;
1.4262 +
1.4263 + if (aFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT) {
1.4264 + // TODO: SVG needs to define what percentage translations resolve against.
1.4265 + return result;
1.4266 + }
1.4267 +
1.4268 + /* Iterate through the continuation list, unioning together all the
1.4269 + * bounding rects.
1.4270 + */
1.4271 + for (const nsIFrame *currFrame = aFrame->FirstContinuation();
1.4272 + currFrame != nullptr;
1.4273 + currFrame = currFrame->GetNextContinuation())
1.4274 + {
1.4275 + /* Get the frame rect in local coordinates, then translate back to the
1.4276 + * original coordinates.
1.4277 + */
1.4278 + result.UnionRect(result, nsRect(currFrame->GetOffsetTo(aFrame),
1.4279 + currFrame->GetSize()));
1.4280 + }
1.4281 +
1.4282 + return result;
1.4283 +}
1.4284 +
1.4285 +#endif
1.4286 +
1.4287 +nsDisplayTransform::nsDisplayTransform(nsDisplayListBuilder* aBuilder, nsIFrame *aFrame,
1.4288 + nsDisplayList *aList, ComputeTransformFunction aTransformGetter,
1.4289 + uint32_t aIndex)
1.4290 + : nsDisplayItem(aBuilder, aFrame)
1.4291 + , mStoredList(aBuilder, aFrame, aList)
1.4292 + , mTransformGetter(aTransformGetter)
1.4293 + , mIndex(aIndex)
1.4294 +{
1.4295 + MOZ_COUNT_CTOR(nsDisplayTransform);
1.4296 + NS_ABORT_IF_FALSE(aFrame, "Must have a frame!");
1.4297 + NS_ABORT_IF_FALSE(!aFrame->IsTransformed(), "Can't specify a transform getter for a transformed frame!");
1.4298 + mStoredList.SetClip(aBuilder, DisplayItemClip::NoClip());
1.4299 +}
1.4300 +
1.4301 +nsDisplayTransform::nsDisplayTransform(nsDisplayListBuilder* aBuilder, nsIFrame *aFrame,
1.4302 + nsDisplayList *aList, uint32_t aIndex)
1.4303 + : nsDisplayItem(aBuilder, aFrame)
1.4304 + , mStoredList(aBuilder, aFrame, aList)
1.4305 + , mTransformGetter(nullptr)
1.4306 + , mIndex(aIndex)
1.4307 +{
1.4308 + MOZ_COUNT_CTOR(nsDisplayTransform);
1.4309 + NS_ABORT_IF_FALSE(aFrame, "Must have a frame!");
1.4310 + mReferenceFrame =
1.4311 + aBuilder->FindReferenceFrameFor(GetTransformRootFrame(aFrame));
1.4312 + mToReferenceFrame = aFrame->GetOffsetToCrossDoc(mReferenceFrame);
1.4313 + mStoredList.SetClip(aBuilder, DisplayItemClip::NoClip());
1.4314 +}
1.4315 +
1.4316 +nsDisplayTransform::nsDisplayTransform(nsDisplayListBuilder* aBuilder, nsIFrame *aFrame,
1.4317 + nsDisplayItem *aItem, uint32_t aIndex)
1.4318 + : nsDisplayItem(aBuilder, aFrame)
1.4319 + , mStoredList(aBuilder, aFrame, aItem)
1.4320 + , mTransformGetter(nullptr)
1.4321 + , mIndex(aIndex)
1.4322 +{
1.4323 + MOZ_COUNT_CTOR(nsDisplayTransform);
1.4324 + NS_ABORT_IF_FALSE(aFrame, "Must have a frame!");
1.4325 + mReferenceFrame =
1.4326 + aBuilder->FindReferenceFrameFor(GetTransformRootFrame(aFrame));
1.4327 + mToReferenceFrame = aFrame->GetOffsetToCrossDoc(mReferenceFrame);
1.4328 + mStoredList.SetClip(aBuilder, DisplayItemClip::NoClip());
1.4329 +}
1.4330 +
1.4331 +/* Returns the delta specified by the -moz-transform-origin property.
1.4332 + * This is a positive delta, meaning that it indicates the direction to move
1.4333 + * to get from (0, 0) of the frame to the transform origin. This function is
1.4334 + * called off the main thread.
1.4335 + */
1.4336 +/* static */ gfxPoint3D
1.4337 +nsDisplayTransform::GetDeltaToTransformOrigin(const nsIFrame* aFrame,
1.4338 + float aAppUnitsPerPixel,
1.4339 + const nsRect* aBoundsOverride)
1.4340 +{
1.4341 + NS_PRECONDITION(aFrame, "Can't get delta for a null frame!");
1.4342 + NS_PRECONDITION(aFrame->IsTransformed() || aFrame->StyleDisplay()->BackfaceIsHidden(),
1.4343 + "Shouldn't get a delta for an untransformed frame!");
1.4344 +
1.4345 + if (!aFrame->IsTransformed()) {
1.4346 + return gfxPoint3D();
1.4347 + }
1.4348 +
1.4349 + /* For both of the coordinates, if the value of -moz-transform is a
1.4350 + * percentage, it's relative to the size of the frame. Otherwise, if it's
1.4351 + * a distance, it's already computed for us!
1.4352 + */
1.4353 + const nsStyleDisplay* display = aFrame->StyleDisplay();
1.4354 + nsRect boundingRect = (aBoundsOverride ? *aBoundsOverride :
1.4355 + nsDisplayTransform::GetFrameBoundsForTransform(aFrame));
1.4356 +
1.4357 + /* Allows us to access named variables by index. */
1.4358 + float coords[3];
1.4359 + const nscoord* dimensions[2] =
1.4360 + {&boundingRect.width, &boundingRect.height};
1.4361 +
1.4362 + for (uint8_t index = 0; index < 2; ++index) {
1.4363 + /* If the -moz-transform-origin specifies a percentage, take the percentage
1.4364 + * of the size of the box.
1.4365 + */
1.4366 + const nsStyleCoord &coord = display->mTransformOrigin[index];
1.4367 + if (coord.GetUnit() == eStyleUnit_Calc) {
1.4368 + const nsStyleCoord::Calc *calc = coord.GetCalcValue();
1.4369 + coords[index] =
1.4370 + NSAppUnitsToFloatPixels(*dimensions[index], aAppUnitsPerPixel) *
1.4371 + calc->mPercent +
1.4372 + NSAppUnitsToFloatPixels(calc->mLength, aAppUnitsPerPixel);
1.4373 + } else if (coord.GetUnit() == eStyleUnit_Percent) {
1.4374 + coords[index] =
1.4375 + NSAppUnitsToFloatPixels(*dimensions[index], aAppUnitsPerPixel) *
1.4376 + coord.GetPercentValue();
1.4377 + } else {
1.4378 + NS_ABORT_IF_FALSE(coord.GetUnit() == eStyleUnit_Coord, "unexpected unit");
1.4379 + coords[index] =
1.4380 + NSAppUnitsToFloatPixels(coord.GetCoordValue(), aAppUnitsPerPixel);
1.4381 + }
1.4382 + if ((aFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT) &&
1.4383 + coord.GetUnit() != eStyleUnit_Percent) {
1.4384 + // <length> values represent offsets from the origin of the SVG element's
1.4385 + // user space, not the top left of its bounds, so we must adjust for that:
1.4386 + nscoord offset =
1.4387 + (index == 0) ? aFrame->GetPosition().x : aFrame->GetPosition().y;
1.4388 + coords[index] -= NSAppUnitsToFloatPixels(offset, aAppUnitsPerPixel);
1.4389 + }
1.4390 + }
1.4391 +
1.4392 + coords[2] = NSAppUnitsToFloatPixels(display->mTransformOrigin[2].GetCoordValue(),
1.4393 + aAppUnitsPerPixel);
1.4394 + /* Adjust based on the origin of the rectangle. */
1.4395 + coords[0] += NSAppUnitsToFloatPixels(boundingRect.x, aAppUnitsPerPixel);
1.4396 + coords[1] += NSAppUnitsToFloatPixels(boundingRect.y, aAppUnitsPerPixel);
1.4397 +
1.4398 + return gfxPoint3D(coords[0], coords[1], coords[2]);
1.4399 +}
1.4400 +
1.4401 +/* Returns the delta specified by the -moz-perspective-origin property.
1.4402 + * This is a positive delta, meaning that it indicates the direction to move
1.4403 + * to get from (0, 0) of the frame to the perspective origin. This function is
1.4404 + * called off the main thread.
1.4405 + */
1.4406 +/* static */ gfxPoint3D
1.4407 +nsDisplayTransform::GetDeltaToPerspectiveOrigin(const nsIFrame* aFrame,
1.4408 + float aAppUnitsPerPixel)
1.4409 +{
1.4410 + NS_PRECONDITION(aFrame, "Can't get delta for a null frame!");
1.4411 + NS_PRECONDITION(aFrame->IsTransformed() || aFrame->StyleDisplay()->BackfaceIsHidden(),
1.4412 + "Shouldn't get a delta for an untransformed frame!");
1.4413 +
1.4414 + if (!aFrame->IsTransformed()) {
1.4415 + return gfxPoint3D();
1.4416 + }
1.4417 +
1.4418 + /* For both of the coordinates, if the value of -moz-perspective-origin is a
1.4419 + * percentage, it's relative to the size of the frame. Otherwise, if it's
1.4420 + * a distance, it's already computed for us!
1.4421 + */
1.4422 +
1.4423 + //TODO: Should this be using our bounds or the parent's bounds?
1.4424 + // How do we handle aBoundsOverride in the latter case?
1.4425 + nsIFrame* parent = aFrame->GetParentStyleContextFrame();
1.4426 + if (!parent) {
1.4427 + return gfxPoint3D();
1.4428 + }
1.4429 + const nsStyleDisplay* display = parent->StyleDisplay();
1.4430 + nsRect boundingRect = nsDisplayTransform::GetFrameBoundsForTransform(parent);
1.4431 +
1.4432 + /* Allows us to access named variables by index. */
1.4433 + gfxPoint3D result;
1.4434 + result.z = 0.0f;
1.4435 + gfxFloat* coords[2] = {&result.x, &result.y};
1.4436 + const nscoord* dimensions[2] =
1.4437 + {&boundingRect.width, &boundingRect.height};
1.4438 +
1.4439 + for (uint8_t index = 0; index < 2; ++index) {
1.4440 + /* If the -moz-transform-origin specifies a percentage, take the percentage
1.4441 + * of the size of the box.
1.4442 + */
1.4443 + const nsStyleCoord &coord = display->mPerspectiveOrigin[index];
1.4444 + if (coord.GetUnit() == eStyleUnit_Calc) {
1.4445 + const nsStyleCoord::Calc *calc = coord.GetCalcValue();
1.4446 + *coords[index] =
1.4447 + NSAppUnitsToFloatPixels(*dimensions[index], aAppUnitsPerPixel) *
1.4448 + calc->mPercent +
1.4449 + NSAppUnitsToFloatPixels(calc->mLength, aAppUnitsPerPixel);
1.4450 + } else if (coord.GetUnit() == eStyleUnit_Percent) {
1.4451 + *coords[index] =
1.4452 + NSAppUnitsToFloatPixels(*dimensions[index], aAppUnitsPerPixel) *
1.4453 + coord.GetPercentValue();
1.4454 + } else {
1.4455 + NS_ABORT_IF_FALSE(coord.GetUnit() == eStyleUnit_Coord, "unexpected unit");
1.4456 + *coords[index] =
1.4457 + NSAppUnitsToFloatPixels(coord.GetCoordValue(), aAppUnitsPerPixel);
1.4458 + }
1.4459 + }
1.4460 +
1.4461 + nsPoint parentOffset = aFrame->GetOffsetTo(parent);
1.4462 + gfxPoint3D gfxOffset(
1.4463 + NSAppUnitsToFloatPixels(parentOffset.x, aAppUnitsPerPixel),
1.4464 + NSAppUnitsToFloatPixels(parentOffset.y, aAppUnitsPerPixel),
1.4465 + 0.0f);
1.4466 +
1.4467 + return result - gfxOffset;
1.4468 +}
1.4469 +
1.4470 +nsDisplayTransform::FrameTransformProperties::FrameTransformProperties(const nsIFrame* aFrame,
1.4471 + float aAppUnitsPerPixel,
1.4472 + const nsRect* aBoundsOverride)
1.4473 + : mFrame(aFrame)
1.4474 + , mTransformList(aFrame->StyleDisplay()->mSpecifiedTransform)
1.4475 + , mToTransformOrigin(GetDeltaToTransformOrigin(aFrame, aAppUnitsPerPixel, aBoundsOverride))
1.4476 + , mToPerspectiveOrigin(GetDeltaToPerspectiveOrigin(aFrame, aAppUnitsPerPixel))
1.4477 + , mChildPerspective(0)
1.4478 +{
1.4479 + const nsStyleDisplay* parentDisp = nullptr;
1.4480 + nsStyleContext* parentStyleContext = aFrame->StyleContext()->GetParent();
1.4481 + if (parentStyleContext) {
1.4482 + parentDisp = parentStyleContext->StyleDisplay();
1.4483 + }
1.4484 + if (parentDisp && parentDisp->mChildPerspective.GetUnit() == eStyleUnit_Coord) {
1.4485 + mChildPerspective = parentDisp->mChildPerspective.GetCoordValue();
1.4486 + }
1.4487 +}
1.4488 +
1.4489 +/* Wraps up the -moz-transform matrix in a change-of-basis matrix pair that
1.4490 + * translates from local coordinate space to transform coordinate space, then
1.4491 + * hands it back.
1.4492 + */
1.4493 +gfx3DMatrix
1.4494 +nsDisplayTransform::GetResultingTransformMatrix(const FrameTransformProperties& aProperties,
1.4495 + const nsPoint& aOrigin,
1.4496 + float aAppUnitsPerPixel,
1.4497 + const nsRect* aBoundsOverride,
1.4498 + nsIFrame** aOutAncestor)
1.4499 +{
1.4500 + return GetResultingTransformMatrixInternal(aProperties, aOrigin, aAppUnitsPerPixel,
1.4501 + aBoundsOverride, aOutAncestor);
1.4502 +}
1.4503 +
1.4504 +gfx3DMatrix
1.4505 +nsDisplayTransform::GetResultingTransformMatrix(const nsIFrame* aFrame,
1.4506 + const nsPoint& aOrigin,
1.4507 + float aAppUnitsPerPixel,
1.4508 + const nsRect* aBoundsOverride,
1.4509 + nsIFrame** aOutAncestor)
1.4510 +{
1.4511 + FrameTransformProperties props(aFrame,
1.4512 + aAppUnitsPerPixel,
1.4513 + aBoundsOverride);
1.4514 +
1.4515 + return GetResultingTransformMatrixInternal(props, aOrigin, aAppUnitsPerPixel,
1.4516 + aBoundsOverride, aOutAncestor);
1.4517 +}
1.4518 +
1.4519 +gfx3DMatrix
1.4520 +nsDisplayTransform::GetResultingTransformMatrixInternal(const FrameTransformProperties& aProperties,
1.4521 + const nsPoint& aOrigin,
1.4522 + float aAppUnitsPerPixel,
1.4523 + const nsRect* aBoundsOverride,
1.4524 + nsIFrame** aOutAncestor)
1.4525 +{
1.4526 + const nsIFrame *frame = aProperties.mFrame;
1.4527 +
1.4528 + if (aOutAncestor) {
1.4529 + *aOutAncestor = nsLayoutUtils::GetCrossDocParentFrame(frame);
1.4530 + }
1.4531 +
1.4532 + /* Account for the -moz-transform-origin property by translating the
1.4533 + * coordinate space to the new origin.
1.4534 + */
1.4535 + gfxPoint3D newOrigin =
1.4536 + gfxPoint3D(NSAppUnitsToFloatPixels(aOrigin.x, aAppUnitsPerPixel),
1.4537 + NSAppUnitsToFloatPixels(aOrigin.y, aAppUnitsPerPixel),
1.4538 + 0.0f);
1.4539 +
1.4540 + /* Get the underlying transform matrix. This requires us to get the
1.4541 + * bounds of the frame.
1.4542 + */
1.4543 + nsRect bounds = (aBoundsOverride ? *aBoundsOverride :
1.4544 + nsDisplayTransform::GetFrameBoundsForTransform(frame));
1.4545 +
1.4546 + /* Get the matrix, then change its basis to factor in the origin. */
1.4547 + bool dummy;
1.4548 + gfx3DMatrix result;
1.4549 + // Call IsSVGTransformed() regardless of the value of
1.4550 + // disp->mSpecifiedTransform, since we still need any transformFromSVGParent.
1.4551 + mozilla::gfx::Matrix svgTransform, transformFromSVGParent;
1.4552 + bool hasSVGTransforms =
1.4553 + frame && frame->IsSVGTransformed(&svgTransform, &transformFromSVGParent);
1.4554 + /* Transformed frames always have a transform, or are preserving 3d (and might still have perspective!) */
1.4555 + if (aProperties.mTransformList) {
1.4556 + result = nsStyleTransformMatrix::ReadTransforms(aProperties.mTransformList->mHead,
1.4557 + frame ? frame->StyleContext() : nullptr,
1.4558 + frame ? frame->PresContext() : nullptr,
1.4559 + dummy, bounds, aAppUnitsPerPixel);
1.4560 + } else if (hasSVGTransforms) {
1.4561 + // Correct the translation components for zoom:
1.4562 + float pixelsPerCSSPx = frame->PresContext()->AppUnitsPerCSSPixel() /
1.4563 + aAppUnitsPerPixel;
1.4564 + svgTransform._31 *= pixelsPerCSSPx;
1.4565 + svgTransform._32 *= pixelsPerCSSPx;
1.4566 + result = gfx3DMatrix::From2D(ThebesMatrix(svgTransform));
1.4567 + }
1.4568 +
1.4569 + if (hasSVGTransforms && !transformFromSVGParent.IsIdentity()) {
1.4570 + // Correct the translation components for zoom:
1.4571 + float pixelsPerCSSPx = frame->PresContext()->AppUnitsPerCSSPixel() /
1.4572 + aAppUnitsPerPixel;
1.4573 + transformFromSVGParent._31 *= pixelsPerCSSPx;
1.4574 + transformFromSVGParent._32 *= pixelsPerCSSPx;
1.4575 + result = result * gfx3DMatrix::From2D(ThebesMatrix(transformFromSVGParent));
1.4576 + }
1.4577 +
1.4578 + if (aProperties.mChildPerspective > 0.0) {
1.4579 + gfx3DMatrix perspective;
1.4580 + perspective._34 =
1.4581 + -1.0 / NSAppUnitsToFloatPixels(aProperties.mChildPerspective, aAppUnitsPerPixel);
1.4582 + /* At the point when perspective is applied, we have been translated to the transform origin.
1.4583 + * The translation to the perspective origin is the difference between these values.
1.4584 + */
1.4585 + result = result * nsLayoutUtils::ChangeMatrixBasis(aProperties.mToPerspectiveOrigin - aProperties.mToTransformOrigin, perspective);
1.4586 + }
1.4587 +
1.4588 + gfxPoint3D rounded(hasSVGTransforms ? newOrigin.x : NS_round(newOrigin.x),
1.4589 + hasSVGTransforms ? newOrigin.y : NS_round(newOrigin.y),
1.4590 + 0);
1.4591 +
1.4592 + if (frame && frame->Preserves3D()) {
1.4593 + // Include the transform set on our parent
1.4594 + NS_ASSERTION(frame->GetParent() &&
1.4595 + frame->GetParent()->IsTransformed() &&
1.4596 + frame->GetParent()->Preserves3DChildren(),
1.4597 + "Preserve3D mismatch!");
1.4598 + FrameTransformProperties props(frame->GetParent(),
1.4599 + aAppUnitsPerPixel,
1.4600 + nullptr);
1.4601 + gfx3DMatrix parent =
1.4602 + GetResultingTransformMatrixInternal(props,
1.4603 + aOrigin - frame->GetPosition(),
1.4604 + aAppUnitsPerPixel, nullptr, aOutAncestor);
1.4605 + return nsLayoutUtils::ChangeMatrixBasis(rounded + aProperties.mToTransformOrigin, result) * parent;
1.4606 + }
1.4607 +
1.4608 + return nsLayoutUtils::ChangeMatrixBasis
1.4609 + (rounded + aProperties.mToTransformOrigin, result);
1.4610 +}
1.4611 +
1.4612 +bool
1.4613 +nsDisplayOpacity::CanUseAsyncAnimations(nsDisplayListBuilder* aBuilder)
1.4614 +{
1.4615 + if (ActiveLayerTracker::IsStyleAnimated(mFrame, eCSSProperty_opacity)) {
1.4616 + return true;
1.4617 + }
1.4618 +
1.4619 + if (nsLayoutUtils::IsAnimationLoggingEnabled()) {
1.4620 + nsCString message;
1.4621 + message.AppendLiteral("Performance warning: Async animation disabled because frame was not marked active for opacity animation");
1.4622 + CommonElementAnimationData::LogAsyncAnimationFailure(message,
1.4623 + Frame()->GetContent());
1.4624 + }
1.4625 + return false;
1.4626 +}
1.4627 +
1.4628 +bool
1.4629 +nsDisplayTransform::CanUseAsyncAnimations(nsDisplayListBuilder* aBuilder)
1.4630 +{
1.4631 + return ShouldPrerenderTransformedContent(aBuilder,
1.4632 + Frame(),
1.4633 + nsLayoutUtils::IsAnimationLoggingEnabled());
1.4634 +}
1.4635 +
1.4636 +/* static */ bool
1.4637 +nsDisplayTransform::ShouldPrerenderTransformedContent(nsDisplayListBuilder* aBuilder,
1.4638 + nsIFrame* aFrame,
1.4639 + bool aLogAnimations)
1.4640 +{
1.4641 + // Elements whose transform has been modified recently, or which
1.4642 + // have a compositor-animated transform, can be prerendered. An element
1.4643 + // might have only just had its transform animated in which case
1.4644 + // the ActiveLayerManager may not have been notified yet.
1.4645 + if (!ActiveLayerTracker::IsStyleAnimated(aFrame, eCSSProperty_transform) &&
1.4646 + (!aFrame->GetContent() ||
1.4647 + !nsLayoutUtils::HasAnimationsForCompositor(aFrame->GetContent(),
1.4648 + eCSSProperty_transform))) {
1.4649 + if (aLogAnimations) {
1.4650 + nsCString message;
1.4651 + message.AppendLiteral("Performance warning: Async animation disabled because frame was not marked active for transform animation");
1.4652 + CommonElementAnimationData::LogAsyncAnimationFailure(message,
1.4653 + aFrame->GetContent());
1.4654 + }
1.4655 + return false;
1.4656 + }
1.4657 +
1.4658 + nsSize refSize = aBuilder->RootReferenceFrame()->GetSize();
1.4659 + // Only prerender if the transformed frame's size (in the reference
1.4660 + // frames coordinate space) is <= the reference frame size (~viewport),
1.4661 + // allowing a 1/8th fuzz factor for shadows, borders, etc.
1.4662 + refSize += nsSize(refSize.width / 8, refSize.height / 8);
1.4663 + nsRect frameRect = aFrame->GetVisualOverflowRectRelativeToSelf();
1.4664 +
1.4665 + frameRect =
1.4666 + nsLayoutUtils::TransformFrameRectToAncestor(aFrame, frameRect,
1.4667 + aBuilder->RootReferenceFrame());
1.4668 +
1.4669 + if (frameRect.Size() <= refSize) {
1.4670 + return true;
1.4671 + }
1.4672 +
1.4673 + if (aLogAnimations) {
1.4674 + nsCString message;
1.4675 + message.AppendLiteral("Performance warning: Async animation disabled because frame size (");
1.4676 + message.AppendInt(nsPresContext::AppUnitsToIntCSSPixels(frameRect.width));
1.4677 + message.AppendLiteral(", ");
1.4678 + message.AppendInt(nsPresContext::AppUnitsToIntCSSPixels(frameRect.height));
1.4679 + message.AppendLiteral(") is bigger than the viewport (");
1.4680 + message.AppendInt(nsPresContext::AppUnitsToIntCSSPixels(refSize.width));
1.4681 + message.AppendLiteral(", ");
1.4682 + message.AppendInt(nsPresContext::AppUnitsToIntCSSPixels(refSize.height));
1.4683 + message.AppendLiteral(")");
1.4684 + CommonElementAnimationData::LogAsyncAnimationFailure(message,
1.4685 + aFrame->GetContent());
1.4686 + }
1.4687 + return false;
1.4688 +}
1.4689 +
1.4690 +/* If the matrix is singular, or a hidden backface is shown, the frame won't be visible or hit. */
1.4691 +static bool IsFrameVisible(nsIFrame* aFrame, const gfx3DMatrix& aMatrix)
1.4692 +{
1.4693 + if (aMatrix.IsSingular()) {
1.4694 + return false;
1.4695 + }
1.4696 + if (aFrame->StyleDisplay()->mBackfaceVisibility == NS_STYLE_BACKFACE_VISIBILITY_HIDDEN &&
1.4697 + aMatrix.IsBackfaceVisible()) {
1.4698 + return false;
1.4699 + }
1.4700 + return true;
1.4701 +}
1.4702 +
1.4703 +const gfx3DMatrix&
1.4704 +nsDisplayTransform::GetTransform()
1.4705 +{
1.4706 + if (mTransform.IsIdentity()) {
1.4707 + float scale = mFrame->PresContext()->AppUnitsPerDevPixel();
1.4708 + gfxPoint3D newOrigin =
1.4709 + gfxPoint3D(NSAppUnitsToFloatPixels(mToReferenceFrame.x, scale),
1.4710 + NSAppUnitsToFloatPixels(mToReferenceFrame.y, scale),
1.4711 + 0.0f);
1.4712 + if (mTransformGetter) {
1.4713 + mTransform = mTransformGetter(mFrame, scale);
1.4714 + mTransform = nsLayoutUtils::ChangeMatrixBasis(newOrigin, mTransform);
1.4715 + } else {
1.4716 + mTransform =
1.4717 + GetResultingTransformMatrix(mFrame, ToReferenceFrame(), scale);
1.4718 +
1.4719 + /**
1.4720 + * Shift the coorindates to be relative to our reference frame instead of relative to this frame.
1.4721 + * When we have preserve-3d, our reference frame is already guaranteed to be an ancestor of the
1.4722 + * preserve-3d chain, so we only need to do this once.
1.4723 + */
1.4724 + bool hasSVGTransforms = mFrame->IsSVGTransformed();
1.4725 + gfxPoint3D rounded(hasSVGTransforms ? newOrigin.x : NS_round(newOrigin.x),
1.4726 + hasSVGTransforms ? newOrigin.y : NS_round(newOrigin.y),
1.4727 + 0);
1.4728 + mTransform.Translate(rounded);
1.4729 + }
1.4730 + }
1.4731 + return mTransform;
1.4732 +}
1.4733 +
1.4734 +bool
1.4735 +nsDisplayTransform::ShouldBuildLayerEvenIfInvisible(nsDisplayListBuilder* aBuilder)
1.4736 +{
1.4737 + return ShouldPrerenderTransformedContent(aBuilder, mFrame, false);
1.4738 +}
1.4739 +
1.4740 +already_AddRefed<Layer> nsDisplayTransform::BuildLayer(nsDisplayListBuilder *aBuilder,
1.4741 + LayerManager *aManager,
1.4742 + const ContainerLayerParameters& aContainerParameters)
1.4743 +{
1.4744 + const gfx3DMatrix& newTransformMatrix = GetTransform();
1.4745 +
1.4746 + if (mFrame->StyleDisplay()->mBackfaceVisibility == NS_STYLE_BACKFACE_VISIBILITY_HIDDEN &&
1.4747 + newTransformMatrix.IsBackfaceVisible()) {
1.4748 + return nullptr;
1.4749 + }
1.4750 +
1.4751 + uint32_t flags = ShouldPrerenderTransformedContent(aBuilder, mFrame, false) ?
1.4752 + FrameLayerBuilder::CONTAINER_NOT_CLIPPED_BY_ANCESTORS : 0;
1.4753 + nsRefPtr<ContainerLayer> container = aManager->GetLayerBuilder()->
1.4754 + BuildContainerLayerFor(aBuilder, aManager, mFrame, this, *mStoredList.GetChildren(),
1.4755 + aContainerParameters, &newTransformMatrix, flags);
1.4756 +
1.4757 + if (!container) {
1.4758 + return nullptr;
1.4759 + }
1.4760 +
1.4761 + // Add the preserve-3d flag for this layer, BuildContainerLayerFor clears all flags,
1.4762 + // so we never need to explicitely unset this flag.
1.4763 + if (mFrame->Preserves3D() || mFrame->Preserves3DChildren()) {
1.4764 + container->SetContentFlags(container->GetContentFlags() | Layer::CONTENT_PRESERVE_3D);
1.4765 + } else {
1.4766 + container->SetContentFlags(container->GetContentFlags() & ~Layer::CONTENT_PRESERVE_3D);
1.4767 + }
1.4768 +
1.4769 + nsDisplayListBuilder::AddAnimationsAndTransitionsToLayer(container, aBuilder,
1.4770 + this, mFrame,
1.4771 + eCSSProperty_transform);
1.4772 + if (ShouldPrerenderTransformedContent(aBuilder, mFrame, false)) {
1.4773 + container->SetUserData(nsIFrame::LayerIsPrerenderedDataKey(),
1.4774 + /*the value is irrelevant*/nullptr);
1.4775 + container->SetContentFlags(container->GetContentFlags() | Layer::CONTENT_MAY_CHANGE_TRANSFORM);
1.4776 + } else {
1.4777 + container->RemoveUserData(nsIFrame::LayerIsPrerenderedDataKey());
1.4778 + container->SetContentFlags(container->GetContentFlags() & ~Layer::CONTENT_MAY_CHANGE_TRANSFORM);
1.4779 + }
1.4780 + return container.forget();
1.4781 +}
1.4782 +
1.4783 +nsDisplayItem::LayerState
1.4784 +nsDisplayTransform::GetLayerState(nsDisplayListBuilder* aBuilder,
1.4785 + LayerManager* aManager,
1.4786 + const ContainerLayerParameters& aParameters) {
1.4787 + // If the transform is 3d, or the layer takes part in preserve-3d sorting
1.4788 + // then we *always* want this to be an active layer.
1.4789 + if (!GetTransform().Is2D() || mFrame->Preserves3D()) {
1.4790 + return LAYER_ACTIVE_FORCE;
1.4791 + }
1.4792 + // Here we check if the *post-transform* bounds of this item are big enough
1.4793 + // to justify an active layer.
1.4794 + if (ActiveLayerTracker::IsStyleAnimated(mFrame, eCSSProperty_transform) &&
1.4795 + !IsItemTooSmallForActiveLayer(this))
1.4796 + return LAYER_ACTIVE;
1.4797 + if (mFrame->GetContent()) {
1.4798 + if (nsLayoutUtils::HasAnimationsForCompositor(mFrame->GetContent(),
1.4799 + eCSSProperty_transform)) {
1.4800 + return LAYER_ACTIVE;
1.4801 + }
1.4802 + }
1.4803 +
1.4804 + const nsStyleDisplay* disp = mFrame->StyleDisplay();
1.4805 + if ((disp->mWillChangeBitField & NS_STYLE_WILL_CHANGE_TRANSFORM)) {
1.4806 + return LAYER_ACTIVE;
1.4807 + }
1.4808 +
1.4809 + // Expect the child display items to have this frame as their animated
1.4810 + // geometry root (since it will be their reference frame). If they have a
1.4811 + // different animated geometry root, we'll make this an active layer so the
1.4812 + // animation can be accelerated.
1.4813 + return RequiredLayerStateForChildren(aBuilder, aManager, aParameters,
1.4814 + *mStoredList.GetChildren(), Frame());
1.4815 +}
1.4816 +
1.4817 +bool nsDisplayTransform::ComputeVisibility(nsDisplayListBuilder *aBuilder,
1.4818 + nsRegion *aVisibleRegion,
1.4819 + const nsRect& aAllowVisibleRegionExpansion)
1.4820 +{
1.4821 + /* As we do this, we need to be sure to
1.4822 + * untransform the visible rect, since we want everything that's painting to
1.4823 + * think that it's painting in its original rectangular coordinate space.
1.4824 + * If we can't untransform, take the entire overflow rect */
1.4825 + nsRect untransformedVisibleRect;
1.4826 + if (ShouldPrerenderTransformedContent(aBuilder, mFrame) ||
1.4827 + !UntransformVisibleRect(aBuilder, &untransformedVisibleRect))
1.4828 + {
1.4829 + untransformedVisibleRect = mFrame->GetVisualOverflowRectRelativeToSelf();
1.4830 + }
1.4831 + nsRegion untransformedVisible = untransformedVisibleRect;
1.4832 + // Call RecomputeVisiblity instead of ComputeVisibility since
1.4833 + // nsDisplayItem::ComputeVisibility should only be called from
1.4834 + // nsDisplayList::ComputeVisibility (which sets mVisibleRect on the item)
1.4835 + mStoredList.RecomputeVisibility(aBuilder, &untransformedVisible);
1.4836 + return true;
1.4837 +}
1.4838 +
1.4839 +#ifdef DEBUG_HIT
1.4840 +#include <time.h>
1.4841 +#endif
1.4842 +
1.4843 +/* HitTest does some fun stuff with matrix transforms to obtain the answer. */
1.4844 +void nsDisplayTransform::HitTest(nsDisplayListBuilder *aBuilder,
1.4845 + const nsRect& aRect,
1.4846 + HitTestState *aState,
1.4847 + nsTArray<nsIFrame*> *aOutFrames)
1.4848 +{
1.4849 + /* Here's how this works:
1.4850 + * 1. Get the matrix. If it's singular, abort (clearly we didn't hit
1.4851 + * anything).
1.4852 + * 2. Invert the matrix.
1.4853 + * 3. Use it to transform the rect into the correct space.
1.4854 + * 4. Pass that rect down through to the list's version of HitTest.
1.4855 + */
1.4856 + // GetTransform always operates in dev pixels.
1.4857 + float factor = mFrame->PresContext()->AppUnitsPerDevPixel();
1.4858 + gfx3DMatrix matrix = GetTransform();
1.4859 +
1.4860 + if (!IsFrameVisible(mFrame, matrix)) {
1.4861 + return;
1.4862 + }
1.4863 +
1.4864 + /* We want to go from transformed-space to regular space.
1.4865 + * Thus we have to invert the matrix, which normally does
1.4866 + * the reverse operation (e.g. regular->transformed)
1.4867 + */
1.4868 + bool snap;
1.4869 + nsRect childBounds = mStoredList.GetBounds(aBuilder, &snap);
1.4870 + gfxRect childGfxBounds(NSAppUnitsToFloatPixels(childBounds.x, factor),
1.4871 + NSAppUnitsToFloatPixels(childBounds.y, factor),
1.4872 + NSAppUnitsToFloatPixels(childBounds.width, factor),
1.4873 + NSAppUnitsToFloatPixels(childBounds.height, factor));
1.4874 +
1.4875 + /* Now, apply the transform and pass it down the channel. */
1.4876 + nsRect resultingRect;
1.4877 + if (aRect.width == 1 && aRect.height == 1) {
1.4878 + // Magic width/height indicating we're hit testing a point, not a rect
1.4879 + gfxPoint point;
1.4880 + if (!matrix.UntransformPoint(gfxPoint(NSAppUnitsToFloatPixels(aRect.x, factor),
1.4881 + NSAppUnitsToFloatPixels(aRect.y, factor)),
1.4882 + childGfxBounds,
1.4883 + &point)) {
1.4884 + return;
1.4885 + }
1.4886 +
1.4887 + resultingRect = nsRect(NSFloatPixelsToAppUnits(float(point.x), factor),
1.4888 + NSFloatPixelsToAppUnits(float(point.y), factor),
1.4889 + 1, 1);
1.4890 +
1.4891 + } else {
1.4892 + gfxRect originalRect(NSAppUnitsToFloatPixels(aRect.x, factor),
1.4893 + NSAppUnitsToFloatPixels(aRect.y, factor),
1.4894 + NSAppUnitsToFloatPixels(aRect.width, factor),
1.4895 + NSAppUnitsToFloatPixels(aRect.height, factor));
1.4896 +
1.4897 + gfxRect rect = matrix.UntransformBounds(originalRect, childGfxBounds);
1.4898 +
1.4899 + resultingRect = nsRect(NSFloatPixelsToAppUnits(float(rect.X()), factor),
1.4900 + NSFloatPixelsToAppUnits(float(rect.Y()), factor),
1.4901 + NSFloatPixelsToAppUnits(float(rect.Width()), factor),
1.4902 + NSFloatPixelsToAppUnits(float(rect.Height()), factor));
1.4903 + }
1.4904 +
1.4905 + if (resultingRect.IsEmpty()) {
1.4906 + return;
1.4907 + }
1.4908 +
1.4909 +
1.4910 +#ifdef DEBUG_HIT
1.4911 + printf("Frame: %p\n", dynamic_cast<void *>(mFrame));
1.4912 + printf(" Untransformed point: (%f, %f)\n", resultingRect.X(), resultingRect.Y());
1.4913 + uint32_t originalFrameCount = aOutFrames.Length();
1.4914 +#endif
1.4915 +
1.4916 + mStoredList.HitTest(aBuilder, resultingRect, aState, aOutFrames);
1.4917 +
1.4918 +#ifdef DEBUG_HIT
1.4919 + if (originalFrameCount != aOutFrames.Length())
1.4920 + printf(" Hit! Time: %f, first frame: %p\n", static_cast<double>(clock()),
1.4921 + dynamic_cast<void *>(aOutFrames.ElementAt(0)));
1.4922 + printf("=== end of hit test ===\n");
1.4923 +#endif
1.4924 +
1.4925 +}
1.4926 +
1.4927 +float
1.4928 +nsDisplayTransform::GetHitDepthAtPoint(nsDisplayListBuilder* aBuilder, const nsPoint& aPoint)
1.4929 +{
1.4930 + // GetTransform always operates in dev pixels.
1.4931 + float factor = mFrame->PresContext()->AppUnitsPerDevPixel();
1.4932 + gfx3DMatrix matrix = GetTransform();
1.4933 +
1.4934 + NS_ASSERTION(IsFrameVisible(mFrame, matrix), "We can't have hit a frame that isn't visible!");
1.4935 +
1.4936 + bool snap;
1.4937 + nsRect childBounds = mStoredList.GetBounds(aBuilder, &snap);
1.4938 + gfxRect childGfxBounds(NSAppUnitsToFloatPixels(childBounds.x, factor),
1.4939 + NSAppUnitsToFloatPixels(childBounds.y, factor),
1.4940 + NSAppUnitsToFloatPixels(childBounds.width, factor),
1.4941 + NSAppUnitsToFloatPixels(childBounds.height, factor));
1.4942 +
1.4943 + gfxPoint point;
1.4944 + DebugOnly<bool> result = matrix.UntransformPoint(gfxPoint(NSAppUnitsToFloatPixels(aPoint.x, factor),
1.4945 + NSAppUnitsToFloatPixels(aPoint.y, factor)),
1.4946 + childGfxBounds,
1.4947 + &point);
1.4948 + NS_ASSERTION(result, "Why are we trying to get the depth for a point we didn't hit?");
1.4949 +
1.4950 + gfxPoint3D transformed = matrix.Transform3D(gfxPoint3D(point.x, point.y, 0));
1.4951 + return transformed.z;
1.4952 +}
1.4953 +
1.4954 +/* The bounding rectangle for the object is the overflow rectangle translated
1.4955 + * by the reference point.
1.4956 + */
1.4957 +nsRect nsDisplayTransform::GetBounds(nsDisplayListBuilder *aBuilder, bool* aSnap)
1.4958 +{
1.4959 + nsRect untransformedBounds =
1.4960 + ShouldPrerenderTransformedContent(aBuilder, mFrame) ?
1.4961 + mFrame->GetVisualOverflowRectRelativeToSelf() :
1.4962 + mStoredList.GetBounds(aBuilder, aSnap);
1.4963 + *aSnap = false;
1.4964 + // GetTransform always operates in dev pixels.
1.4965 + float factor = mFrame->PresContext()->AppUnitsPerDevPixel();
1.4966 + return nsLayoutUtils::MatrixTransformRect(untransformedBounds,
1.4967 + GetTransform(),
1.4968 + factor);
1.4969 +}
1.4970 +
1.4971 +/* The transform is opaque iff the transform consists solely of scales and
1.4972 + * translations and if the underlying content is opaque. Thus if the transform
1.4973 + * is of the form
1.4974 + *
1.4975 + * |a c e|
1.4976 + * |b d f|
1.4977 + * |0 0 1|
1.4978 + *
1.4979 + * We need b and c to be zero.
1.4980 + *
1.4981 + * We also need to check whether the underlying opaque content completely fills
1.4982 + * our visible rect. We use UntransformRect which expands to the axis-aligned
1.4983 + * bounding rect, but that's OK since if
1.4984 + * mStoredList.GetVisibleRect().Contains(untransformedVisible), then it
1.4985 + * certainly contains the actual (non-axis-aligned) untransformed rect.
1.4986 + */
1.4987 +nsRegion nsDisplayTransform::GetOpaqueRegion(nsDisplayListBuilder *aBuilder,
1.4988 + bool* aSnap)
1.4989 +{
1.4990 + *aSnap = false;
1.4991 + nsRect untransformedVisible;
1.4992 + // If we're going to prerender all our content, pretend like we
1.4993 + // don't have opqaue content so that everything under us is rendered
1.4994 + // as well. That will increase graphics memory usage if our frame
1.4995 + // covers the entire window, but it allows our transform to be
1.4996 + // updated extremely cheaply, without invalidating any other
1.4997 + // content.
1.4998 + if (ShouldPrerenderTransformedContent(aBuilder, mFrame) ||
1.4999 + !UntransformVisibleRect(aBuilder, &untransformedVisible)) {
1.5000 + return nsRegion();
1.5001 + }
1.5002 +
1.5003 + const gfx3DMatrix& matrix = GetTransform();
1.5004 +
1.5005 + nsRegion result;
1.5006 + gfxMatrix matrix2d;
1.5007 + bool tmpSnap;
1.5008 + if (matrix.Is2D(&matrix2d) &&
1.5009 + matrix2d.PreservesAxisAlignedRectangles() &&
1.5010 + mStoredList.GetOpaqueRegion(aBuilder, &tmpSnap).Contains(untransformedVisible)) {
1.5011 + result = mVisibleRect;
1.5012 + }
1.5013 + return result;
1.5014 +}
1.5015 +
1.5016 +/* The transform is uniform if it fills the entire bounding rect and the
1.5017 + * wrapped list is uniform. See GetOpaqueRegion for discussion of why this
1.5018 + * works.
1.5019 + */
1.5020 +bool nsDisplayTransform::IsUniform(nsDisplayListBuilder *aBuilder, nscolor* aColor)
1.5021 +{
1.5022 + nsRect untransformedVisible;
1.5023 + if (!UntransformVisibleRect(aBuilder, &untransformedVisible)) {
1.5024 + return false;
1.5025 + }
1.5026 + const gfx3DMatrix& matrix = GetTransform();
1.5027 +
1.5028 + gfxMatrix matrix2d;
1.5029 + return matrix.Is2D(&matrix2d) &&
1.5030 + matrix2d.PreservesAxisAlignedRectangles() &&
1.5031 + mStoredList.GetVisibleRect().Contains(untransformedVisible) &&
1.5032 + mStoredList.IsUniform(aBuilder, aColor);
1.5033 +}
1.5034 +
1.5035 +/* If UNIFIED_CONTINUATIONS is defined, we can merge two display lists that
1.5036 + * share the same underlying content. Otherwise, doing so results in graphical
1.5037 + * glitches.
1.5038 + */
1.5039 +#ifndef UNIFIED_CONTINUATIONS
1.5040 +
1.5041 +bool
1.5042 +nsDisplayTransform::TryMerge(nsDisplayListBuilder *aBuilder,
1.5043 + nsDisplayItem *aItem)
1.5044 +{
1.5045 + return false;
1.5046 +}
1.5047 +
1.5048 +#else
1.5049 +
1.5050 +bool
1.5051 +nsDisplayTransform::TryMerge(nsDisplayListBuilder *aBuilder,
1.5052 + nsDisplayItem *aItem)
1.5053 +{
1.5054 + NS_PRECONDITION(aItem, "Why did you try merging with a null item?");
1.5055 + NS_PRECONDITION(aBuilder, "Why did you try merging with a null builder?");
1.5056 +
1.5057 + /* Make sure that we're dealing with two transforms. */
1.5058 + if (aItem->GetType() != TYPE_TRANSFORM)
1.5059 + return false;
1.5060 +
1.5061 + /* Check to see that both frames are part of the same content. */
1.5062 + if (aItem->Frame()->GetContent() != mFrame->GetContent())
1.5063 + return false;
1.5064 +
1.5065 + if (aItem->GetClip() != GetClip())
1.5066 + return false;
1.5067 +
1.5068 + /* Now, move everything over to this frame and signal that
1.5069 + * we merged things!
1.5070 + */
1.5071 + mStoredList.MergeFrom(&static_cast<nsDisplayTransform*>(aItem)->mStoredList);
1.5072 + return true;
1.5073 +}
1.5074 +
1.5075 +#endif
1.5076 +
1.5077 +/* TransformRect takes in as parameters a rectangle (in app space) and returns
1.5078 + * the smallest rectangle (in app space) containing the transformed image of
1.5079 + * that rectangle. That is, it takes the four corners of the rectangle,
1.5080 + * transforms them according to the matrix associated with the specified frame,
1.5081 + * then returns the smallest rectangle containing the four transformed points.
1.5082 + *
1.5083 + * @param aUntransformedBounds The rectangle (in app units) to transform.
1.5084 + * @param aFrame The frame whose transformation should be applied.
1.5085 + * @param aOrigin The delta from the frame origin to the coordinate space origin
1.5086 + * @param aBoundsOverride (optional) Force the frame bounds to be the
1.5087 + * specified bounds.
1.5088 + * @return The smallest rectangle containing the image of the transformed
1.5089 + * rectangle.
1.5090 + */
1.5091 +nsRect nsDisplayTransform::TransformRect(const nsRect &aUntransformedBounds,
1.5092 + const nsIFrame* aFrame,
1.5093 + const nsPoint &aOrigin,
1.5094 + const nsRect* aBoundsOverride)
1.5095 +{
1.5096 + NS_PRECONDITION(aFrame, "Can't take the transform based on a null frame!");
1.5097 +
1.5098 + float factor = aFrame->PresContext()->AppUnitsPerDevPixel();
1.5099 + return nsLayoutUtils::MatrixTransformRect
1.5100 + (aUntransformedBounds,
1.5101 + GetResultingTransformMatrix(aFrame, aOrigin, factor, aBoundsOverride),
1.5102 + factor);
1.5103 +}
1.5104 +
1.5105 +nsRect nsDisplayTransform::TransformRectOut(const nsRect &aUntransformedBounds,
1.5106 + const nsIFrame* aFrame,
1.5107 + const nsPoint &aOrigin,
1.5108 + const nsRect* aBoundsOverride)
1.5109 +{
1.5110 + NS_PRECONDITION(aFrame, "Can't take the transform based on a null frame!");
1.5111 +
1.5112 + float factor = aFrame->PresContext()->AppUnitsPerDevPixel();
1.5113 + return nsLayoutUtils::MatrixTransformRectOut
1.5114 + (aUntransformedBounds,
1.5115 + GetResultingTransformMatrix(aFrame, aOrigin, factor, aBoundsOverride),
1.5116 + factor);
1.5117 +}
1.5118 +
1.5119 +bool nsDisplayTransform::UntransformRect(const nsRect &aTransformedBounds,
1.5120 + const nsRect &aChildBounds,
1.5121 + const nsIFrame* aFrame,
1.5122 + const nsPoint &aOrigin,
1.5123 + nsRect *aOutRect)
1.5124 +{
1.5125 + NS_PRECONDITION(aFrame, "Can't take the transform based on a null frame!");
1.5126 +
1.5127 + float factor = aFrame->PresContext()->AppUnitsPerDevPixel();
1.5128 +
1.5129 + gfx3DMatrix transform = GetResultingTransformMatrix(aFrame, aOrigin, factor, nullptr);
1.5130 + if (transform.IsSingular()) {
1.5131 + return false;
1.5132 + }
1.5133 +
1.5134 + gfxRect result(NSAppUnitsToFloatPixels(aTransformedBounds.x, factor),
1.5135 + NSAppUnitsToFloatPixels(aTransformedBounds.y, factor),
1.5136 + NSAppUnitsToFloatPixels(aTransformedBounds.width, factor),
1.5137 + NSAppUnitsToFloatPixels(aTransformedBounds.height, factor));
1.5138 +
1.5139 + gfxRect childGfxBounds(NSAppUnitsToFloatPixels(aChildBounds.x, factor),
1.5140 + NSAppUnitsToFloatPixels(aChildBounds.y, factor),
1.5141 + NSAppUnitsToFloatPixels(aChildBounds.width, factor),
1.5142 + NSAppUnitsToFloatPixels(aChildBounds.height, factor));
1.5143 +
1.5144 + result = transform.UntransformBounds(result, childGfxBounds);
1.5145 + *aOutRect = nsLayoutUtils::RoundGfxRectToAppRect(result, factor);
1.5146 + return true;
1.5147 +}
1.5148 +
1.5149 +bool nsDisplayTransform::UntransformVisibleRect(nsDisplayListBuilder* aBuilder,
1.5150 + nsRect *aOutRect)
1.5151 +{
1.5152 + const gfx3DMatrix& matrix = GetTransform();
1.5153 + if (matrix.IsSingular())
1.5154 + return false;
1.5155 +
1.5156 + // GetTransform always operates in dev pixels.
1.5157 + float factor = mFrame->PresContext()->AppUnitsPerDevPixel();
1.5158 + gfxRect result(NSAppUnitsToFloatPixels(mVisibleRect.x, factor),
1.5159 + NSAppUnitsToFloatPixels(mVisibleRect.y, factor),
1.5160 + NSAppUnitsToFloatPixels(mVisibleRect.width, factor),
1.5161 + NSAppUnitsToFloatPixels(mVisibleRect.height, factor));
1.5162 +
1.5163 + bool snap;
1.5164 + nsRect childBounds = mStoredList.GetBounds(aBuilder, &snap);
1.5165 + gfxRect childGfxBounds(NSAppUnitsToFloatPixels(childBounds.x, factor),
1.5166 + NSAppUnitsToFloatPixels(childBounds.y, factor),
1.5167 + NSAppUnitsToFloatPixels(childBounds.width, factor),
1.5168 + NSAppUnitsToFloatPixels(childBounds.height, factor));
1.5169 +
1.5170 + /* We want to untransform the matrix, so invert the transformation first! */
1.5171 + result = matrix.UntransformBounds(result, childGfxBounds);
1.5172 +
1.5173 + *aOutRect = nsLayoutUtils::RoundGfxRectToAppRect(result, factor);
1.5174 +
1.5175 + return true;
1.5176 +}
1.5177 +
1.5178 +nsDisplaySVGEffects::nsDisplaySVGEffects(nsDisplayListBuilder* aBuilder,
1.5179 + nsIFrame* aFrame, nsDisplayList* aList)
1.5180 + : nsDisplayWrapList(aBuilder, aFrame, aList),
1.5181 + mEffectsBounds(aFrame->GetVisualOverflowRectRelativeToSelf())
1.5182 +{
1.5183 + MOZ_COUNT_CTOR(nsDisplaySVGEffects);
1.5184 +}
1.5185 +
1.5186 +#ifdef NS_BUILD_REFCNT_LOGGING
1.5187 +nsDisplaySVGEffects::~nsDisplaySVGEffects()
1.5188 +{
1.5189 + MOZ_COUNT_DTOR(nsDisplaySVGEffects);
1.5190 +}
1.5191 +#endif
1.5192 +
1.5193 +nsRegion nsDisplaySVGEffects::GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
1.5194 + bool* aSnap)
1.5195 +{
1.5196 + *aSnap = false;
1.5197 + return nsRegion();
1.5198 +}
1.5199 +
1.5200 +void
1.5201 +nsDisplaySVGEffects::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
1.5202 + HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames)
1.5203 +{
1.5204 + nsPoint rectCenter(aRect.x + aRect.width / 2, aRect.y + aRect.height / 2);
1.5205 + if (nsSVGIntegrationUtils::HitTestFrameForEffects(mFrame,
1.5206 + rectCenter - ToReferenceFrame())) {
1.5207 + mList.HitTest(aBuilder, aRect, aState, aOutFrames);
1.5208 + }
1.5209 +}
1.5210 +
1.5211 +void
1.5212 +nsDisplaySVGEffects::PaintAsLayer(nsDisplayListBuilder* aBuilder,
1.5213 + nsRenderingContext* aCtx,
1.5214 + LayerManager* aManager)
1.5215 +{
1.5216 + nsSVGIntegrationUtils::PaintFramesWithEffects(aCtx, mFrame,
1.5217 + mVisibleRect,
1.5218 + aBuilder, aManager);
1.5219 +}
1.5220 +
1.5221 +LayerState
1.5222 +nsDisplaySVGEffects::GetLayerState(nsDisplayListBuilder* aBuilder,
1.5223 + LayerManager* aManager,
1.5224 + const ContainerLayerParameters& aParameters)
1.5225 +{
1.5226 + return LAYER_SVG_EFFECTS;
1.5227 +}
1.5228 +
1.5229 +already_AddRefed<Layer>
1.5230 +nsDisplaySVGEffects::BuildLayer(nsDisplayListBuilder* aBuilder,
1.5231 + LayerManager* aManager,
1.5232 + const ContainerLayerParameters& aContainerParameters)
1.5233 +{
1.5234 + const nsIContent* content = mFrame->GetContent();
1.5235 + bool hasSVGLayout = (mFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT);
1.5236 + if (hasSVGLayout) {
1.5237 + nsISVGChildFrame *svgChildFrame = do_QueryFrame(mFrame);
1.5238 + if (!svgChildFrame || !mFrame->GetContent()->IsSVG()) {
1.5239 + NS_ASSERTION(false, "why?");
1.5240 + return nullptr;
1.5241 + }
1.5242 + if (!static_cast<const nsSVGElement*>(content)->HasValidDimensions()) {
1.5243 + return nullptr; // The SVG spec says not to draw filters for this
1.5244 + }
1.5245 + }
1.5246 +
1.5247 + float opacity = mFrame->StyleDisplay()->mOpacity;
1.5248 + if (opacity == 0.0f)
1.5249 + return nullptr;
1.5250 +
1.5251 + nsIFrame* firstFrame =
1.5252 + nsLayoutUtils::FirstContinuationOrIBSplitSibling(mFrame);
1.5253 + nsSVGEffects::EffectProperties effectProperties =
1.5254 + nsSVGEffects::GetEffectProperties(firstFrame);
1.5255 +
1.5256 + bool isOK = effectProperties.HasNoFilterOrHasValidFilter();
1.5257 + effectProperties.GetClipPathFrame(&isOK);
1.5258 + effectProperties.GetMaskFrame(&isOK);
1.5259 +
1.5260 + if (!isOK) {
1.5261 + return nullptr;
1.5262 + }
1.5263 +
1.5264 + ContainerLayerParameters newContainerParameters = aContainerParameters;
1.5265 + if (effectProperties.HasValidFilter()) {
1.5266 + newContainerParameters.mDisableSubpixelAntialiasingInDescendants = true;
1.5267 + }
1.5268 +
1.5269 + nsRefPtr<ContainerLayer> container = aManager->GetLayerBuilder()->
1.5270 + BuildContainerLayerFor(aBuilder, aManager, mFrame, this, mList,
1.5271 + newContainerParameters, nullptr);
1.5272 +
1.5273 + return container.forget();
1.5274 +}
1.5275 +
1.5276 +bool nsDisplaySVGEffects::ComputeVisibility(nsDisplayListBuilder* aBuilder,
1.5277 + nsRegion* aVisibleRegion,
1.5278 + const nsRect& aAllowVisibleRegionExpansion) {
1.5279 + nsPoint offset = ToReferenceFrame();
1.5280 + nsRect dirtyRect =
1.5281 + nsSVGIntegrationUtils::GetRequiredSourceForInvalidArea(mFrame,
1.5282 + mVisibleRect - offset) +
1.5283 + offset;
1.5284 +
1.5285 + // Our children may be made translucent or arbitrarily deformed so we should
1.5286 + // not allow them to subtract area from aVisibleRegion.
1.5287 + nsRegion childrenVisible(dirtyRect);
1.5288 + nsRect r = dirtyRect.Intersect(mList.GetBounds(aBuilder));
1.5289 + mList.ComputeVisibilityForSublist(aBuilder, &childrenVisible, r, nsRect());
1.5290 + return true;
1.5291 +}
1.5292 +
1.5293 +bool nsDisplaySVGEffects::TryMerge(nsDisplayListBuilder* aBuilder, nsDisplayItem* aItem)
1.5294 +{
1.5295 + if (aItem->GetType() != TYPE_SVG_EFFECTS)
1.5296 + return false;
1.5297 + // items for the same content element should be merged into a single
1.5298 + // compositing group
1.5299 + // aItem->GetUnderlyingFrame() returns non-null because it's nsDisplaySVGEffects
1.5300 + if (aItem->Frame()->GetContent() != mFrame->GetContent())
1.5301 + return false;
1.5302 + if (aItem->GetClip() != GetClip())
1.5303 + return false;
1.5304 + nsDisplaySVGEffects* other = static_cast<nsDisplaySVGEffects*>(aItem);
1.5305 + MergeFromTrackingMergedFrames(other);
1.5306 + mEffectsBounds.UnionRect(mEffectsBounds,
1.5307 + other->mEffectsBounds + other->mFrame->GetOffsetTo(mFrame));
1.5308 + return true;
1.5309 +}
1.5310 +
1.5311 +#ifdef MOZ_DUMP_PAINTING
1.5312 +void
1.5313 +nsDisplaySVGEffects::PrintEffects(nsACString& aTo)
1.5314 +{
1.5315 + nsIFrame* firstFrame =
1.5316 + nsLayoutUtils::FirstContinuationOrIBSplitSibling(mFrame);
1.5317 + nsSVGEffects::EffectProperties effectProperties =
1.5318 + nsSVGEffects::GetEffectProperties(firstFrame);
1.5319 + bool isOK = true;
1.5320 + nsSVGClipPathFrame *clipPathFrame = effectProperties.GetClipPathFrame(&isOK);
1.5321 + bool first = true;
1.5322 + aTo += " effects=(";
1.5323 + if (mFrame->StyleDisplay()->mOpacity != 1.0f) {
1.5324 + first = false;
1.5325 + aTo += nsPrintfCString("opacity(%f)", mFrame->StyleDisplay()->mOpacity);
1.5326 + }
1.5327 + if (clipPathFrame) {
1.5328 + if (!first) {
1.5329 + aTo += ", ";
1.5330 + }
1.5331 + aTo += nsPrintfCString("clip(%s)", clipPathFrame->IsTrivial() ? "trivial" : "non-trivial");
1.5332 + first = false;
1.5333 + }
1.5334 + if (effectProperties.HasValidFilter()) {
1.5335 + if (!first) {
1.5336 + aTo += ", ";
1.5337 + }
1.5338 + aTo += "filter";
1.5339 + first = false;
1.5340 + }
1.5341 + if (effectProperties.GetMaskFrame(&isOK)) {
1.5342 + if (!first) {
1.5343 + aTo += ", ";
1.5344 + }
1.5345 + aTo += "mask";
1.5346 + }
1.5347 + aTo += ")";
1.5348 +}
1.5349 +#endif
1.5350 +
