The Tor Browser / file comparison
comparison: gfx/layers/ReadbackProcessor.cpp
gfx/layers/ReadbackProcessor.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
equal
deleted
inserted
replaced
| -1:000000000000 | 0:0611910c7293 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- | |
| 2 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "ReadbackProcessor.h" | |
| 7 #include <sys/types.h> // for int32_t | |
| 8 #include "Layers.h" // for Layer, ThebesLayer, etc | |
| 9 #include "ReadbackLayer.h" // for ReadbackLayer, ReadbackSink | |
| 10 #include "gfx3DMatrix.h" // for gfx3DMatrix | |
| 11 #include "gfxColor.h" // for gfxRGBA | |
| 12 #include "gfxContext.h" // for gfxContext | |
| 13 #include "gfxRect.h" // for gfxRect | |
| 14 #include "mozilla/gfx/BasePoint.h" // for BasePoint | |
| 15 #include "mozilla/gfx/BaseRect.h" // for BaseRect | |
| 16 #include "nsAutoPtr.h" // for nsRefPtr, nsAutoPtr | |
| 17 #include "nsDebug.h" // for NS_ASSERTION | |
| 18 #include "nsISupportsImpl.h" // for gfxContext::Release, etc | |
| 19 #include "nsPoint.h" // for nsIntPoint | |
| 20 #include "nsRegion.h" // for nsIntRegion | |
| 21 #include "nsSize.h" // for nsIntSize | |
| 22 | |
| 23 namespace mozilla { | |
| 24 namespace layers { | |
| 25 | |
| 26 void | |
| 27 ReadbackProcessor::BuildUpdates(ContainerLayer* aContainer) | |
| 28 { | |
| 29 NS_ASSERTION(mAllUpdates.IsEmpty(), "Some updates not processed?"); | |
| 30 | |
| 31 if (!aContainer->mMayHaveReadbackChild) | |
| 32 return; | |
| 33 | |
| 34 aContainer->mMayHaveReadbackChild = false; | |
| 35 // go backwards so the updates read from earlier layers are later in the | |
| 36 // array. | |
| 37 for (Layer* l = aContainer->GetLastChild(); l; l = l->GetPrevSibling()) { | |
| 38 if (l->GetType() == Layer::TYPE_READBACK) { | |
| 39 aContainer->mMayHaveReadbackChild = true; | |
| 40 BuildUpdatesForLayer(static_cast<ReadbackLayer*>(l)); | |
| 41 } | |
| 42 } | |
| 43 } | |
| 44 | |
| 45 static Layer* | |
| 46 FindBackgroundLayer(ReadbackLayer* aLayer, nsIntPoint* aOffset) | |
| 47 { | |
| 48 gfx::Matrix transform; | |
| 49 if (!aLayer->GetTransform().Is2D(&transform) || | |
| 50 transform.HasNonIntegerTranslation()) | |
| 51 return nullptr; | |
| 52 nsIntPoint transformOffset(int32_t(transform._31), int32_t(transform._32)); | |
| 53 | |
| 54 for (Layer* l = aLayer->GetPrevSibling(); l; l = l->GetPrevSibling()) { | |
| 55 gfx::Matrix backgroundTransform; | |
| 56 if (!l->GetTransform().Is2D(&backgroundTransform) || | |
| 57 gfx::ThebesMatrix(backgroundTransform).HasNonIntegerTranslation()) | |
| 58 return nullptr; | |
| 59 | |
| 60 nsIntPoint backgroundOffset(int32_t(backgroundTransform._31), int32_t(backgroundTransform._32)); | |
| 61 nsIntRect rectInBackground(transformOffset - backgroundOffset, aLayer->GetSize()); | |
| 62 const nsIntRegion& visibleRegion = l->GetEffectiveVisibleRegion(); | |
| 63 if (!visibleRegion.Intersects(rectInBackground)) | |
| 64 continue; | |
| 65 // Since l is present in the background, from here on we either choose l | |
| 66 // or nothing. | |
| 67 if (!visibleRegion.Contains(rectInBackground)) | |
| 68 return nullptr; | |
| 69 | |
| 70 if (l->GetEffectiveOpacity() != 1.0 || | |
| 71 !(l->GetContentFlags() & Layer::CONTENT_OPAQUE)) | |
| 72 return nullptr; | |
| 73 | |
| 74 // cliprects are post-transform | |
| 75 const nsIntRect* clipRect = l->GetEffectiveClipRect(); | |
| 76 if (clipRect && !clipRect->Contains(nsIntRect(transformOffset, aLayer->GetSize()))) | |
| 77 return nullptr; | |
| 78 | |
| 79 Layer::LayerType type = l->GetType(); | |
| 80 if (type != Layer::TYPE_COLOR && type != Layer::TYPE_THEBES) | |
| 81 return nullptr; | |
| 82 | |
| 83 *aOffset = backgroundOffset - transformOffset; | |
| 84 return l; | |
| 85 } | |
| 86 | |
| 87 return nullptr; | |
| 88 } | |
| 89 | |
| 90 void | |
| 91 ReadbackProcessor::BuildUpdatesForLayer(ReadbackLayer* aLayer) | |
| 92 { | |
| 93 if (!aLayer->mSink) | |
| 94 return; | |
| 95 | |
| 96 nsIntPoint offset; | |
| 97 Layer* newBackground = FindBackgroundLayer(aLayer, &offset); | |
| 98 if (!newBackground) { | |
| 99 aLayer->SetUnknown(); | |
| 100 return; | |
| 101 } | |
| 102 | |
| 103 if (newBackground->GetType() == Layer::TYPE_COLOR) { | |
| 104 ColorLayer* colorLayer = static_cast<ColorLayer*>(newBackground); | |
| 105 if (aLayer->mBackgroundColor != colorLayer->GetColor()) { | |
| 106 aLayer->mBackgroundLayer = nullptr; | |
| 107 aLayer->mBackgroundColor = colorLayer->GetColor(); | |
| 108 NS_ASSERTION(aLayer->mBackgroundColor.a == 1.0, | |
| 109 "Color layer said it was opaque!"); | |
| 110 nsRefPtr<gfxContext> ctx = | |
| 111 aLayer->mSink->BeginUpdate(aLayer->GetRect(), | |
| 112 aLayer->AllocateSequenceNumber()); | |
| 113 if (ctx) { | |
| 114 ctx->SetColor(aLayer->mBackgroundColor); | |
| 115 nsIntSize size = aLayer->GetSize(); | |
| 116 ctx->Rectangle(gfxRect(0, 0, size.width, size.height)); | |
| 117 ctx->Fill(); | |
| 118 aLayer->mSink->EndUpdate(ctx, aLayer->GetRect()); | |
| 119 } | |
| 120 } | |
| 121 } else { | |
| 122 NS_ASSERTION(newBackground->AsThebesLayer(), "Must be ThebesLayer"); | |
| 123 ThebesLayer* thebesLayer = static_cast<ThebesLayer*>(newBackground); | |
| 124 // updateRect is relative to the ThebesLayer | |
| 125 nsIntRect updateRect = aLayer->GetRect() - offset; | |
| 126 if (thebesLayer != aLayer->mBackgroundLayer || | |
| 127 offset != aLayer->mBackgroundLayerOffset) { | |
| 128 aLayer->mBackgroundLayer = thebesLayer; | |
| 129 aLayer->mBackgroundLayerOffset = offset; | |
| 130 aLayer->mBackgroundColor = gfxRGBA(0,0,0,0); | |
| 131 thebesLayer->SetUsedForReadback(true); | |
| 132 } else { | |
| 133 nsIntRegion invalid; | |
| 134 invalid.Sub(updateRect, thebesLayer->GetValidRegion()); | |
| 135 updateRect = invalid.GetBounds(); | |
| 136 } | |
| 137 | |
| 138 Update update = { aLayer, updateRect, aLayer->AllocateSequenceNumber() }; | |
| 139 mAllUpdates.AppendElement(update); | |
| 140 } | |
| 141 } | |
| 142 | |
| 143 void | |
| 144 ReadbackProcessor::GetThebesLayerUpdates(ThebesLayer* aLayer, | |
| 145 nsTArray<Update>* aUpdates, | |
| 146 nsIntRegion* aUpdateRegion) | |
| 147 { | |
| 148 // All ThebesLayers used for readback are in mAllUpdates (some possibly | |
| 149 // with an empty update rect). | |
| 150 aLayer->SetUsedForReadback(false); | |
| 151 if (aUpdateRegion) { | |
| 152 aUpdateRegion->SetEmpty(); | |
| 153 } | |
| 154 for (uint32_t i = mAllUpdates.Length(); i > 0; --i) { | |
| 155 const Update& update = mAllUpdates[i - 1]; | |
| 156 if (update.mLayer->mBackgroundLayer == aLayer) { | |
| 157 aLayer->SetUsedForReadback(true); | |
| 158 // Don't bother asking for updates if we have an empty update rect. | |
| 159 if (!update.mUpdateRect.IsEmpty()) { | |
| 160 aUpdates->AppendElement(update); | |
| 161 if (aUpdateRegion) { | |
| 162 aUpdateRegion->Or(*aUpdateRegion, update.mUpdateRect); | |
| 163 } | |
| 164 } | |
| 165 mAllUpdates.RemoveElementAt(i - 1); | |
| 166 } | |
| 167 } | |
| 168 } | |
| 169 | |
| 170 ReadbackProcessor::~ReadbackProcessor() | |
| 171 { | |
| 172 for (uint32_t i = mAllUpdates.Length(); i > 0; --i) { | |
| 173 const Update& update = mAllUpdates[i - 1]; | |
| 174 // Unprocessed update. Notify the readback sink that this content is | |
| 175 // unknown. | |
| 176 update.mLayer->SetUnknown(); | |
| 177 } | |
| 178 } | |
| 179 | |
| 180 } | |
| 181 } |
