1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/image/src/FrameBlender.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,613 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + * This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "FrameBlender.h"
1.10 +
1.11 +#include "mozilla/MemoryReporting.h"
1.12 +#include "MainThreadUtils.h"
1.13 +
1.14 +#include "pixman.h"
1.15 +
1.16 +using namespace mozilla;
1.17 +using namespace mozilla::image;
1.18 +
1.19 +namespace mozilla {
1.20 +namespace image {
1.21 +
1.22 +FrameBlender::FrameBlender(FrameSequence* aSequenceToUse /* = nullptr */)
1.23 + : mFrames(aSequenceToUse)
1.24 + , mAnim(nullptr)
1.25 + , mLoopCount(-1)
1.26 +{
1.27 + if (!mFrames) {
1.28 + mFrames = new FrameSequence();
1.29 + }
1.30 +}
1.31 +
1.32 +FrameBlender::~FrameBlender()
1.33 +{
1.34 + delete mAnim;
1.35 +}
1.36 +
1.37 +already_AddRefed<FrameSequence>
1.38 +FrameBlender::GetFrameSequence()
1.39 +{
1.40 + nsRefPtr<FrameSequence> seq(mFrames);
1.41 + return seq.forget();
1.42 +}
1.43 +
1.44 +imgFrame*
1.45 +FrameBlender::GetFrame(uint32_t framenum) const
1.46 +{
1.47 + if (!mAnim) {
1.48 + NS_ASSERTION(framenum == 0, "Don't ask for a frame > 0 if we're not animated!");
1.49 + return mFrames->GetFrame(0);
1.50 + }
1.51 + if (mAnim->lastCompositedFrameIndex == int32_t(framenum))
1.52 + return mAnim->compositingFrame;
1.53 + return mFrames->GetFrame(framenum);
1.54 +}
1.55 +
1.56 +imgFrame*
1.57 +FrameBlender::RawGetFrame(uint32_t framenum) const
1.58 +{
1.59 + if (!mAnim) {
1.60 + NS_ASSERTION(framenum == 0, "Don't ask for a frame > 0 if we're not animated!");
1.61 + return mFrames->GetFrame(0);
1.62 + }
1.63 +
1.64 + return mFrames->GetFrame(framenum);
1.65 +}
1.66 +
1.67 +uint32_t
1.68 +FrameBlender::GetNumFrames() const
1.69 +{
1.70 + return mFrames->GetNumFrames();
1.71 +}
1.72 +
1.73 +int32_t
1.74 +FrameBlender::GetTimeoutForFrame(uint32_t framenum) const
1.75 +{
1.76 + const int32_t timeout = RawGetFrame(framenum)->GetRawTimeout();
1.77 + // Ensure a minimal time between updates so we don't throttle the UI thread.
1.78 + // consider 0 == unspecified and make it fast but not too fast. Unless we have
1.79 + // a single loop GIF. See bug 890743, bug 125137, bug 139677, and bug 207059.
1.80 + // The behavior of recent IE and Opera versions seems to be:
1.81 + // IE 6/Win:
1.82 + // 10 - 50ms go 100ms
1.83 + // >50ms go correct speed
1.84 + // Opera 7 final/Win:
1.85 + // 10ms goes 100ms
1.86 + // >10ms go correct speed
1.87 + // It seems that there are broken tools out there that set a 0ms or 10ms
1.88 + // timeout when they really want a "default" one. So munge values in that
1.89 + // range.
1.90 + if (timeout >= 0 && timeout <= 10 && mLoopCount != 0)
1.91 + return 100;
1.92 + return timeout;
1.93 +}
1.94 +
1.95 +void
1.96 +FrameBlender::SetLoopCount(int32_t aLoopCount)
1.97 +{
1.98 + mLoopCount = aLoopCount;
1.99 +}
1.100 +
1.101 +int32_t
1.102 +FrameBlender::GetLoopCount() const
1.103 +{
1.104 + return mLoopCount;
1.105 +}
1.106 +
1.107 +void
1.108 +FrameBlender::RemoveFrame(uint32_t framenum)
1.109 +{
1.110 + NS_ABORT_IF_FALSE(framenum < GetNumFrames(), "Deleting invalid frame!");
1.111 +
1.112 + mFrames->RemoveFrame(framenum);
1.113 +}
1.114 +
1.115 +void
1.116 +FrameBlender::ClearFrames()
1.117 +{
1.118 + // Forget our old frame sequence, letting whoever else has it deal with it.
1.119 + mFrames = new FrameSequence();
1.120 +}
1.121 +
1.122 +void
1.123 +FrameBlender::InsertFrame(uint32_t framenum, imgFrame* aFrame)
1.124 +{
1.125 + NS_ABORT_IF_FALSE(framenum <= GetNumFrames(), "Inserting invalid frame!");
1.126 + mFrames->InsertFrame(framenum, aFrame);
1.127 + if (GetNumFrames() > 1) {
1.128 + EnsureAnimExists();
1.129 + }
1.130 +}
1.131 +
1.132 +imgFrame*
1.133 +FrameBlender::SwapFrame(uint32_t framenum, imgFrame* aFrame)
1.134 +{
1.135 + NS_ABORT_IF_FALSE(framenum < GetNumFrames(), "Swapping invalid frame!");
1.136 +
1.137 + imgFrame* ret;
1.138 +
1.139 + // Steal the imgFrame from wherever it's currently stored
1.140 + if (mAnim && mAnim->lastCompositedFrameIndex == int32_t(framenum)) {
1.141 + ret = mAnim->compositingFrame.Forget();
1.142 + mAnim->lastCompositedFrameIndex = -1;
1.143 + nsAutoPtr<imgFrame> toDelete(mFrames->SwapFrame(framenum, aFrame));
1.144 + } else {
1.145 + ret = mFrames->SwapFrame(framenum, aFrame);
1.146 + }
1.147 +
1.148 + return ret;
1.149 +}
1.150 +
1.151 +void
1.152 +FrameBlender::EnsureAnimExists()
1.153 +{
1.154 + if (!mAnim) {
1.155 + // Create the animation context
1.156 + mAnim = new Anim();
1.157 +
1.158 + // We should only get into this code path directly after we've created our
1.159 + // second frame (hence we know we're animated).
1.160 + MOZ_ASSERT(GetNumFrames() == 2);
1.161 + }
1.162 +}
1.163 +
1.164 +//******************************************************************************
1.165 +// DoBlend gets called when the timer for animation get fired and we have to
1.166 +// update the composited frame of the animation.
1.167 +bool
1.168 +FrameBlender::DoBlend(nsIntRect* aDirtyRect,
1.169 + uint32_t aPrevFrameIndex,
1.170 + uint32_t aNextFrameIndex)
1.171 +{
1.172 + if (!aDirtyRect) {
1.173 + return false;
1.174 + }
1.175 +
1.176 + const FrameDataPair& prevFrame = mFrames->GetFrame(aPrevFrameIndex);
1.177 + const FrameDataPair& nextFrame = mFrames->GetFrame(aNextFrameIndex);
1.178 + if (!prevFrame.HasFrameData() || !nextFrame.HasFrameData()) {
1.179 + return false;
1.180 + }
1.181 +
1.182 + int32_t prevFrameDisposalMethod = prevFrame->GetFrameDisposalMethod();
1.183 + if (prevFrameDisposalMethod == FrameBlender::kDisposeRestorePrevious &&
1.184 + !mAnim->compositingPrevFrame)
1.185 + prevFrameDisposalMethod = FrameBlender::kDisposeClear;
1.186 +
1.187 + nsIntRect prevFrameRect = prevFrame->GetRect();
1.188 + bool isFullPrevFrame = (prevFrameRect.x == 0 && prevFrameRect.y == 0 &&
1.189 + prevFrameRect.width == mSize.width &&
1.190 + prevFrameRect.height == mSize.height);
1.191 +
1.192 + // Optimization: DisposeClearAll if the previous frame is the same size as
1.193 + // container and it's clearing itself
1.194 + if (isFullPrevFrame &&
1.195 + (prevFrameDisposalMethod == FrameBlender::kDisposeClear))
1.196 + prevFrameDisposalMethod = FrameBlender::kDisposeClearAll;
1.197 +
1.198 + int32_t nextFrameDisposalMethod = nextFrame->GetFrameDisposalMethod();
1.199 + nsIntRect nextFrameRect = nextFrame->GetRect();
1.200 + bool isFullNextFrame = (nextFrameRect.x == 0 && nextFrameRect.y == 0 &&
1.201 + nextFrameRect.width == mSize.width &&
1.202 + nextFrameRect.height == mSize.height);
1.203 +
1.204 + if (!nextFrame->GetIsPaletted()) {
1.205 + // Optimization: Skip compositing if the previous frame wants to clear the
1.206 + // whole image
1.207 + if (prevFrameDisposalMethod == FrameBlender::kDisposeClearAll) {
1.208 + aDirtyRect->SetRect(0, 0, mSize.width, mSize.height);
1.209 + return true;
1.210 + }
1.211 +
1.212 + // Optimization: Skip compositing if this frame is the same size as the
1.213 + // container and it's fully drawing over prev frame (no alpha)
1.214 + if (isFullNextFrame &&
1.215 + (nextFrameDisposalMethod != FrameBlender::kDisposeRestorePrevious) &&
1.216 + !nextFrame->GetHasAlpha()) {
1.217 + aDirtyRect->SetRect(0, 0, mSize.width, mSize.height);
1.218 + return true;
1.219 + }
1.220 + }
1.221 +
1.222 + // Calculate area that needs updating
1.223 + switch (prevFrameDisposalMethod) {
1.224 + default:
1.225 + case FrameBlender::kDisposeNotSpecified:
1.226 + case FrameBlender::kDisposeKeep:
1.227 + *aDirtyRect = nextFrameRect;
1.228 + break;
1.229 +
1.230 + case FrameBlender::kDisposeClearAll:
1.231 + // Whole image container is cleared
1.232 + aDirtyRect->SetRect(0, 0, mSize.width, mSize.height);
1.233 + break;
1.234 +
1.235 + case FrameBlender::kDisposeClear:
1.236 + // Calc area that needs to be redrawn (the combination of previous and
1.237 + // this frame)
1.238 + // XXX - This could be done with multiple framechanged calls
1.239 + // Having prevFrame way at the top of the image, and nextFrame
1.240 + // way at the bottom, and both frames being small, we'd be
1.241 + // telling framechanged to refresh the whole image when only two
1.242 + // small areas are needed.
1.243 + aDirtyRect->UnionRect(nextFrameRect, prevFrameRect);
1.244 + break;
1.245 +
1.246 + case FrameBlender::kDisposeRestorePrevious:
1.247 + aDirtyRect->SetRect(0, 0, mSize.width, mSize.height);
1.248 + break;
1.249 + }
1.250 +
1.251 + // Optimization:
1.252 + // Skip compositing if the last composited frame is this frame
1.253 + // (Only one composited frame was made for this animation. Example:
1.254 + // Only Frame 3 of a 10 frame image required us to build a composite frame
1.255 + // On the second loop, we do not need to rebuild the frame
1.256 + // since it's still sitting in compositingFrame)
1.257 + if (mAnim->lastCompositedFrameIndex == int32_t(aNextFrameIndex)) {
1.258 + return true;
1.259 + }
1.260 +
1.261 + bool needToBlankComposite = false;
1.262 +
1.263 + // Create the Compositing Frame
1.264 + if (!mAnim->compositingFrame) {
1.265 + mAnim->compositingFrame.SetFrame(new imgFrame());
1.266 + nsresult rv = mAnim->compositingFrame->Init(0, 0, mSize.width, mSize.height,
1.267 + gfxImageFormat::ARGB32);
1.268 + if (NS_FAILED(rv)) {
1.269 + mAnim->compositingFrame.SetFrame(nullptr);
1.270 + return false;
1.271 + }
1.272 + mAnim->compositingFrame.LockAndGetData();
1.273 + needToBlankComposite = true;
1.274 + } else if (int32_t(aNextFrameIndex) != mAnim->lastCompositedFrameIndex+1) {
1.275 +
1.276 + // If we are not drawing on top of last composited frame,
1.277 + // then we are building a new composite frame, so let's clear it first.
1.278 + needToBlankComposite = true;
1.279 + }
1.280 +
1.281 + // More optimizations possible when next frame is not transparent
1.282 + // But if the next frame has FrameBlender::kDisposeRestorePrevious,
1.283 + // this "no disposal" optimization is not possible,
1.284 + // because the frame in "after disposal operation" state
1.285 + // needs to be stored in compositingFrame, so it can be
1.286 + // copied into compositingPrevFrame later.
1.287 + bool doDisposal = true;
1.288 + if (!nextFrame->GetHasAlpha() &&
1.289 + nextFrameDisposalMethod != FrameBlender::kDisposeRestorePrevious) {
1.290 + if (isFullNextFrame) {
1.291 + // Optimization: No need to dispose prev.frame when
1.292 + // next frame is full frame and not transparent.
1.293 + doDisposal = false;
1.294 + // No need to blank the composite frame
1.295 + needToBlankComposite = false;
1.296 + } else {
1.297 + if ((prevFrameRect.x >= nextFrameRect.x) &&
1.298 + (prevFrameRect.y >= nextFrameRect.y) &&
1.299 + (prevFrameRect.x + prevFrameRect.width <= nextFrameRect.x + nextFrameRect.width) &&
1.300 + (prevFrameRect.y + prevFrameRect.height <= nextFrameRect.y + nextFrameRect.height)) {
1.301 + // Optimization: No need to dispose prev.frame when
1.302 + // next frame fully overlaps previous frame.
1.303 + doDisposal = false;
1.304 + }
1.305 + }
1.306 + }
1.307 +
1.308 + if (doDisposal) {
1.309 + // Dispose of previous: clear, restore, or keep (copy)
1.310 + switch (prevFrameDisposalMethod) {
1.311 + case FrameBlender::kDisposeClear:
1.312 + if (needToBlankComposite) {
1.313 + // If we just created the composite, it could have anything in its
1.314 + // buffer. Clear whole frame
1.315 + ClearFrame(mAnim->compositingFrame.GetFrameData(),
1.316 + mAnim->compositingFrame.GetFrame()->GetRect());
1.317 + } else {
1.318 + // Only blank out previous frame area (both color & Mask/Alpha)
1.319 + ClearFrame(mAnim->compositingFrame.GetFrameData(),
1.320 + mAnim->compositingFrame.GetFrame()->GetRect(),
1.321 + prevFrameRect);
1.322 + }
1.323 + break;
1.324 +
1.325 + case FrameBlender::kDisposeClearAll:
1.326 + ClearFrame(mAnim->compositingFrame.GetFrameData(),
1.327 + mAnim->compositingFrame.GetFrame()->GetRect());
1.328 + break;
1.329 +
1.330 + case FrameBlender::kDisposeRestorePrevious:
1.331 + // It would be better to copy only the area changed back to
1.332 + // compositingFrame.
1.333 + if (mAnim->compositingPrevFrame) {
1.334 + CopyFrameImage(mAnim->compositingPrevFrame.GetFrameData(),
1.335 + mAnim->compositingPrevFrame.GetFrame()->GetRect(),
1.336 + mAnim->compositingFrame.GetFrameData(),
1.337 + mAnim->compositingFrame.GetFrame()->GetRect());
1.338 +
1.339 + // destroy only if we don't need it for this frame's disposal
1.340 + if (nextFrameDisposalMethod != FrameBlender::kDisposeRestorePrevious)
1.341 + mAnim->compositingPrevFrame.SetFrame(nullptr);
1.342 + } else {
1.343 + ClearFrame(mAnim->compositingFrame.GetFrameData(),
1.344 + mAnim->compositingFrame.GetFrame()->GetRect());
1.345 + }
1.346 + break;
1.347 +
1.348 + default:
1.349 + // Copy previous frame into compositingFrame before we put the new frame on top
1.350 + // Assumes that the previous frame represents a full frame (it could be
1.351 + // smaller in size than the container, as long as the frame before it erased
1.352 + // itself)
1.353 + // Note: Frame 1 never gets into DoBlend(), so (aNextFrameIndex - 1) will
1.354 + // always be a valid frame number.
1.355 + if (mAnim->lastCompositedFrameIndex != int32_t(aNextFrameIndex - 1)) {
1.356 + if (isFullPrevFrame && !prevFrame->GetIsPaletted()) {
1.357 + // Just copy the bits
1.358 + CopyFrameImage(prevFrame.GetFrameData(),
1.359 + prevFrame.GetFrame()->GetRect(),
1.360 + mAnim->compositingFrame.GetFrameData(),
1.361 + mAnim->compositingFrame.GetFrame()->GetRect());
1.362 + } else {
1.363 + if (needToBlankComposite) {
1.364 + // Only blank composite when prev is transparent or not full.
1.365 + if (prevFrame->GetHasAlpha() || !isFullPrevFrame) {
1.366 + ClearFrame(mAnim->compositingFrame.GetFrameData(),
1.367 + mAnim->compositingFrame.GetFrame()->GetRect());
1.368 + }
1.369 + }
1.370 + DrawFrameTo(prevFrame.GetFrameData(), prevFrameRect,
1.371 + prevFrame.GetFrame()->PaletteDataLength(),
1.372 + prevFrame.GetFrame()->GetHasAlpha(),
1.373 + mAnim->compositingFrame.GetFrameData(),
1.374 + mAnim->compositingFrame.GetFrame()->GetRect(),
1.375 + FrameBlendMethod(prevFrame.GetFrame()->GetBlendMethod()));
1.376 + }
1.377 + }
1.378 + }
1.379 + } else if (needToBlankComposite) {
1.380 + // If we just created the composite, it could have anything in it's
1.381 + // buffers. Clear them
1.382 + ClearFrame(mAnim->compositingFrame.GetFrameData(),
1.383 + mAnim->compositingFrame.GetFrame()->GetRect());
1.384 + }
1.385 +
1.386 + // Check if the frame we are composing wants the previous image restored afer
1.387 + // it is done. Don't store it (again) if last frame wanted its image restored
1.388 + // too
1.389 + if ((nextFrameDisposalMethod == FrameBlender::kDisposeRestorePrevious) &&
1.390 + (prevFrameDisposalMethod != FrameBlender::kDisposeRestorePrevious)) {
1.391 + // We are storing the whole image.
1.392 + // It would be better if we just stored the area that nextFrame is going to
1.393 + // overwrite.
1.394 + if (!mAnim->compositingPrevFrame) {
1.395 + mAnim->compositingPrevFrame.SetFrame(new imgFrame());
1.396 + nsresult rv = mAnim->compositingPrevFrame->Init(0, 0, mSize.width, mSize.height,
1.397 + gfxImageFormat::ARGB32);
1.398 + if (NS_FAILED(rv)) {
1.399 + mAnim->compositingPrevFrame.SetFrame(nullptr);
1.400 + return false;
1.401 + }
1.402 +
1.403 + mAnim->compositingPrevFrame.LockAndGetData();
1.404 + }
1.405 +
1.406 + CopyFrameImage(mAnim->compositingFrame.GetFrameData(),
1.407 + mAnim->compositingFrame.GetFrame()->GetRect(),
1.408 + mAnim->compositingPrevFrame.GetFrameData(),
1.409 + mAnim->compositingPrevFrame.GetFrame()->GetRect());
1.410 + }
1.411 +
1.412 + // blit next frame into it's correct spot
1.413 + DrawFrameTo(nextFrame.GetFrameData(), nextFrameRect,
1.414 + nextFrame.GetFrame()->PaletteDataLength(),
1.415 + nextFrame.GetFrame()->GetHasAlpha(),
1.416 + mAnim->compositingFrame.GetFrameData(),
1.417 + mAnim->compositingFrame.GetFrame()->GetRect(),
1.418 + FrameBlendMethod(nextFrame.GetFrame()->GetBlendMethod()));
1.419 +
1.420 + // Set timeout of CompositeFrame to timeout of frame we just composed
1.421 + // Bug 177948
1.422 + int32_t timeout = nextFrame->GetRawTimeout();
1.423 + mAnim->compositingFrame->SetRawTimeout(timeout);
1.424 +
1.425 + // Tell the image that it is fully 'downloaded'.
1.426 + nsresult rv = mAnim->compositingFrame->ImageUpdated(mAnim->compositingFrame->GetRect());
1.427 + if (NS_FAILED(rv)) {
1.428 + return false;
1.429 + }
1.430 +
1.431 + mAnim->lastCompositedFrameIndex = int32_t(aNextFrameIndex);
1.432 +
1.433 + return true;
1.434 +}
1.435 +
1.436 +//******************************************************************************
1.437 +// Fill aFrame with black. Does also clears the mask.
1.438 +void
1.439 +FrameBlender::ClearFrame(uint8_t* aFrameData, const nsIntRect& aFrameRect)
1.440 +{
1.441 + if (!aFrameData)
1.442 + return;
1.443 +
1.444 + memset(aFrameData, 0, aFrameRect.width * aFrameRect.height * 4);
1.445 +}
1.446 +
1.447 +//******************************************************************************
1.448 +void
1.449 +FrameBlender::ClearFrame(uint8_t* aFrameData, const nsIntRect& aFrameRect, const nsIntRect& aRectToClear)
1.450 +{
1.451 + if (!aFrameData || aFrameRect.width <= 0 || aFrameRect.height <= 0 ||
1.452 + aRectToClear.width <= 0 || aRectToClear.height <= 0) {
1.453 + return;
1.454 + }
1.455 +
1.456 + nsIntRect toClear = aFrameRect.Intersect(aRectToClear);
1.457 + if (toClear.IsEmpty()) {
1.458 + return;
1.459 + }
1.460 +
1.461 + uint32_t bytesPerRow = aFrameRect.width * 4;
1.462 + for (int row = toClear.y; row < toClear.y + toClear.height; ++row) {
1.463 + memset(aFrameData + toClear.x * 4 + row * bytesPerRow, 0, toClear.width * 4);
1.464 + }
1.465 +}
1.466 +
1.467 +//******************************************************************************
1.468 +// Whether we succeed or fail will not cause a crash, and there's not much
1.469 +// we can do about a failure, so there we don't return a nsresult
1.470 +bool
1.471 +FrameBlender::CopyFrameImage(const uint8_t *aDataSrc, const nsIntRect& aRectSrc,
1.472 + uint8_t *aDataDest, const nsIntRect& aRectDest)
1.473 +{
1.474 + uint32_t dataLengthSrc = aRectSrc.width * aRectSrc.height * 4;
1.475 + uint32_t dataLengthDest = aRectDest.width * aRectDest.height * 4;
1.476 +
1.477 + if (!aDataDest || !aDataSrc || dataLengthSrc != dataLengthDest) {
1.478 + return false;
1.479 + }
1.480 +
1.481 + memcpy(aDataDest, aDataSrc, dataLengthDest);
1.482 +
1.483 + return true;
1.484 +}
1.485 +
1.486 +nsresult
1.487 +FrameBlender::DrawFrameTo(const uint8_t *aSrcData, const nsIntRect& aSrcRect,
1.488 + uint32_t aSrcPaletteLength, bool aSrcHasAlpha,
1.489 + uint8_t *aDstPixels, const nsIntRect& aDstRect,
1.490 + FrameBlender::FrameBlendMethod aBlendMethod)
1.491 +{
1.492 + NS_ENSURE_ARG_POINTER(aSrcData);
1.493 + NS_ENSURE_ARG_POINTER(aDstPixels);
1.494 +
1.495 + // According to both AGIF and APNG specs, offsets are unsigned
1.496 + if (aSrcRect.x < 0 || aSrcRect.y < 0) {
1.497 + NS_WARNING("FrameBlender::DrawFrameTo: negative offsets not allowed");
1.498 + return NS_ERROR_FAILURE;
1.499 + }
1.500 + // Outside the destination frame, skip it
1.501 + if ((aSrcRect.x > aDstRect.width) || (aSrcRect.y > aDstRect.height)) {
1.502 + return NS_OK;
1.503 + }
1.504 +
1.505 + if (aSrcPaletteLength) {
1.506 + // Larger than the destination frame, clip it
1.507 + int32_t width = std::min(aSrcRect.width, aDstRect.width - aSrcRect.x);
1.508 + int32_t height = std::min(aSrcRect.height, aDstRect.height - aSrcRect.y);
1.509 +
1.510 + // The clipped image must now fully fit within destination image frame
1.511 + NS_ASSERTION((aSrcRect.x >= 0) && (aSrcRect.y >= 0) &&
1.512 + (aSrcRect.x + width <= aDstRect.width) &&
1.513 + (aSrcRect.y + height <= aDstRect.height),
1.514 + "FrameBlender::DrawFrameTo: Invalid aSrcRect");
1.515 +
1.516 + // clipped image size may be smaller than source, but not larger
1.517 + NS_ASSERTION((width <= aSrcRect.width) && (height <= aSrcRect.height),
1.518 + "FrameBlender::DrawFrameTo: source must be smaller than dest");
1.519 +
1.520 + // Get pointers to image data
1.521 + const uint8_t *srcPixels = aSrcData + aSrcPaletteLength;
1.522 + uint32_t *dstPixels = reinterpret_cast<uint32_t*>(aDstPixels);
1.523 + const uint32_t *colormap = reinterpret_cast<const uint32_t*>(aSrcData);
1.524 +
1.525 + // Skip to the right offset
1.526 + dstPixels += aSrcRect.x + (aSrcRect.y * aDstRect.width);
1.527 + if (!aSrcHasAlpha) {
1.528 + for (int32_t r = height; r > 0; --r) {
1.529 + for (int32_t c = 0; c < width; c++) {
1.530 + dstPixels[c] = colormap[srcPixels[c]];
1.531 + }
1.532 + // Go to the next row in the source resp. destination image
1.533 + srcPixels += aSrcRect.width;
1.534 + dstPixels += aDstRect.width;
1.535 + }
1.536 + } else {
1.537 + for (int32_t r = height; r > 0; --r) {
1.538 + for (int32_t c = 0; c < width; c++) {
1.539 + const uint32_t color = colormap[srcPixels[c]];
1.540 + if (color)
1.541 + dstPixels[c] = color;
1.542 + }
1.543 + // Go to the next row in the source resp. destination image
1.544 + srcPixels += aSrcRect.width;
1.545 + dstPixels += aDstRect.width;
1.546 + }
1.547 + }
1.548 + } else {
1.549 + pixman_image_t* src = pixman_image_create_bits(aSrcHasAlpha ? PIXMAN_a8r8g8b8 : PIXMAN_x8r8g8b8,
1.550 + aSrcRect.width,
1.551 + aSrcRect.height,
1.552 + reinterpret_cast<uint32_t*>(const_cast<uint8_t*>(aSrcData)),
1.553 + aSrcRect.width * 4);
1.554 + pixman_image_t* dst = pixman_image_create_bits(PIXMAN_a8r8g8b8,
1.555 + aDstRect.width,
1.556 + aDstRect.height,
1.557 + reinterpret_cast<uint32_t*>(aDstPixels),
1.558 + aDstRect.width * 4);
1.559 +
1.560 + pixman_image_composite32(aBlendMethod == FrameBlender::kBlendSource ? PIXMAN_OP_SRC : PIXMAN_OP_OVER,
1.561 + src,
1.562 + nullptr,
1.563 + dst,
1.564 + 0, 0,
1.565 + 0, 0,
1.566 + aSrcRect.x, aSrcRect.y,
1.567 + aSrcRect.width, aSrcRect.height);
1.568 +
1.569 + pixman_image_unref(src);
1.570 + pixman_image_unref(dst);
1.571 + }
1.572 +
1.573 + return NS_OK;
1.574 +}
1.575 +
1.576 +void
1.577 +FrameBlender::Discard()
1.578 +{
1.579 + MOZ_ASSERT(NS_IsMainThread());
1.580 +
1.581 + // As soon as an image becomes animated, it becomes non-discardable and any
1.582 + // timers are cancelled.
1.583 + NS_ABORT_IF_FALSE(!mAnim, "Asked to discard for animated image!");
1.584 +
1.585 + // Delete all the decoded frames, then clear the array.
1.586 + ClearFrames();
1.587 +}
1.588 +
1.589 +size_t
1.590 +FrameBlender::SizeOfDecodedWithComputedFallbackIfHeap(gfxMemoryLocation aLocation,
1.591 + MallocSizeOf aMallocSizeOf) const
1.592 +{
1.593 + size_t n = mFrames->SizeOfDecodedWithComputedFallbackIfHeap(aLocation, aMallocSizeOf);
1.594 +
1.595 + if (mAnim) {
1.596 + if (mAnim->compositingFrame) {
1.597 + n += mAnim->compositingFrame->SizeOfExcludingThisWithComputedFallbackIfHeap(aLocation, aMallocSizeOf);
1.598 + }
1.599 + if (mAnim->compositingPrevFrame) {
1.600 + n += mAnim->compositingPrevFrame->SizeOfExcludingThisWithComputedFallbackIfHeap(aLocation, aMallocSizeOf);
1.601 + }
1.602 + }
1.603 +
1.604 + return n;
1.605 +}
1.606 +
1.607 +void
1.608 +FrameBlender::ResetAnimation()
1.609 +{
1.610 + if (mAnim) {
1.611 + mAnim->lastCompositedFrameIndex = -1;
1.612 + }
1.613 +}
1.614 +
1.615 +} // namespace image
1.616 +} // namespace mozilla
