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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /image/decoders/nsWebPDecoder.cpp
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'image/decoders/nsWebPDecoder.cpp')
-rw-r--r--image/decoders/nsWebPDecoder.cpp605
1 files changed, 605 insertions, 0 deletions
diff --git a/image/decoders/nsWebPDecoder.cpp b/image/decoders/nsWebPDecoder.cpp
new file mode 100644
index 0000000000..e7467f0066
--- /dev/null
+++ b/image/decoders/nsWebPDecoder.cpp
@@ -0,0 +1,605 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "ImageLogging.h" // Must appear first
+#include "gfxPlatform.h"
+#include "mozilla/TelemetryHistogramEnums.h"
+#include "nsWebPDecoder.h"
+
+#include "RasterImage.h"
+#include "SurfacePipeFactory.h"
+
+using namespace mozilla::gfx;
+
+namespace mozilla {
+namespace image {
+
+static LazyLogModule sWebPLog("WebPDecoder");
+
+nsWebPDecoder::nsWebPDecoder(RasterImage* aImage)
+ : Decoder(aImage),
+ mDecoder(nullptr),
+ mBlend(BlendMethod::OVER),
+ mDisposal(DisposalMethod::KEEP),
+ mTimeout(FrameTimeout::Forever()),
+ mFormat(SurfaceFormat::OS_RGBX),
+ mLastRow(0),
+ mCurrentFrame(0),
+ mData(nullptr),
+ mLength(0),
+ mIteratorComplete(false),
+ mNeedDemuxer(true),
+ mGotColorProfile(false) {
+ MOZ_LOG(sWebPLog, LogLevel::Debug,
+ ("[this=%p] nsWebPDecoder::nsWebPDecoder", this));
+}
+
+nsWebPDecoder::~nsWebPDecoder() {
+ MOZ_LOG(sWebPLog, LogLevel::Debug,
+ ("[this=%p] nsWebPDecoder::~nsWebPDecoder", this));
+ if (mDecoder) {
+ WebPIDelete(mDecoder);
+ WebPFreeDecBuffer(&mBuffer);
+ }
+}
+
+LexerResult nsWebPDecoder::ReadData() {
+ MOZ_ASSERT(mData);
+ MOZ_ASSERT(mLength > 0);
+
+ WebPDemuxer* demuxer = nullptr;
+ bool complete = mIteratorComplete;
+
+ if (mNeedDemuxer) {
+ WebPDemuxState state;
+ WebPData fragment;
+ fragment.bytes = mData;
+ fragment.size = mLength;
+
+ demuxer = WebPDemuxPartial(&fragment, &state);
+ if (state == WEBP_DEMUX_PARSE_ERROR) {
+ MOZ_LOG(
+ sWebPLog, LogLevel::Error,
+ ("[this=%p] nsWebPDecoder::ReadData -- demux parse error\n", this));
+ WebPDemuxDelete(demuxer);
+ return LexerResult(TerminalState::FAILURE);
+ }
+
+ if (state == WEBP_DEMUX_PARSING_HEADER) {
+ WebPDemuxDelete(demuxer);
+ return LexerResult(Yield::NEED_MORE_DATA);
+ }
+
+ if (!demuxer) {
+ MOZ_LOG(sWebPLog, LogLevel::Error,
+ ("[this=%p] nsWebPDecoder::ReadData -- no demuxer\n", this));
+ return LexerResult(TerminalState::FAILURE);
+ }
+
+ complete = complete || state == WEBP_DEMUX_DONE;
+ }
+
+ LexerResult rv(TerminalState::FAILURE);
+ if (!HasSize()) {
+ rv = ReadHeader(demuxer, complete);
+ } else {
+ rv = ReadPayload(demuxer, complete);
+ }
+
+ WebPDemuxDelete(demuxer);
+ return rv;
+}
+
+LexerResult nsWebPDecoder::DoDecode(SourceBufferIterator& aIterator,
+ IResumable* aOnResume) {
+ while (true) {
+ SourceBufferIterator::State state = SourceBufferIterator::COMPLETE;
+ if (!mIteratorComplete) {
+ state = aIterator.AdvanceOrScheduleResume(SIZE_MAX, aOnResume);
+
+ // We need to remember since we can't advance a complete iterator.
+ mIteratorComplete = state == SourceBufferIterator::COMPLETE;
+ }
+
+ if (state == SourceBufferIterator::WAITING) {
+ return LexerResult(Yield::NEED_MORE_DATA);
+ }
+
+ LexerResult rv = UpdateBuffer(aIterator, state);
+ if (rv.is<Yield>() && rv.as<Yield>() == Yield::NEED_MORE_DATA) {
+ // We need to check the iterator to see if more is available before
+ // giving up unless we are already complete.
+ if (mIteratorComplete) {
+ MOZ_LOG(sWebPLog, LogLevel::Error,
+ ("[this=%p] nsWebPDecoder::DoDecode -- read all data, "
+ "but needs more\n",
+ this));
+ return LexerResult(TerminalState::FAILURE);
+ }
+ continue;
+ }
+
+ return rv;
+ }
+}
+
+LexerResult nsWebPDecoder::UpdateBuffer(SourceBufferIterator& aIterator,
+ SourceBufferIterator::State aState) {
+ MOZ_ASSERT(!HasError(), "Shouldn't call DoDecode after error!");
+
+ switch (aState) {
+ case SourceBufferIterator::READY:
+ if (!aIterator.IsContiguous()) {
+ // We need to buffer. This should be rare, but expensive.
+ break;
+ }
+ if (!mData) {
+ // For as long as we hold onto an iterator, we know the data pointers
+ // to the chunks cannot change underneath us, so save the pointer to
+ // the first block.
+ MOZ_ASSERT(mLength == 0);
+ mData = reinterpret_cast<const uint8_t*>(aIterator.Data());
+ }
+ mLength += aIterator.Length();
+ return ReadData();
+ case SourceBufferIterator::COMPLETE:
+ if (!mData) {
+ // We must have hit an error, such as an OOM, when buffering the
+ // first set of encoded data.
+ MOZ_LOG(
+ sWebPLog, LogLevel::Error,
+ ("[this=%p] nsWebPDecoder::DoDecode -- complete no data\n", this));
+ return LexerResult(TerminalState::FAILURE);
+ }
+ return ReadData();
+ default:
+ MOZ_LOG(sWebPLog, LogLevel::Error,
+ ("[this=%p] nsWebPDecoder::DoDecode -- bad state\n", this));
+ return LexerResult(TerminalState::FAILURE);
+ }
+
+ // We need to buffer. If we have no data buffered, we need to get everything
+ // from the first chunk of the source buffer before appending the new data.
+ if (mBufferedData.empty()) {
+ MOZ_ASSERT(mData);
+ MOZ_ASSERT(mLength > 0);
+
+ if (!mBufferedData.append(mData, mLength)) {
+ MOZ_LOG(sWebPLog, LogLevel::Error,
+ ("[this=%p] nsWebPDecoder::DoDecode -- oom, initialize %zu\n",
+ this, mLength));
+ return LexerResult(TerminalState::FAILURE);
+ }
+
+ MOZ_LOG(sWebPLog, LogLevel::Debug,
+ ("[this=%p] nsWebPDecoder::DoDecode -- buffered %zu bytes\n", this,
+ mLength));
+ }
+
+ // Append the incremental data from the iterator.
+ if (!mBufferedData.append(aIterator.Data(), aIterator.Length())) {
+ MOZ_LOG(sWebPLog, LogLevel::Error,
+ ("[this=%p] nsWebPDecoder::DoDecode -- oom, append %zu on %zu\n",
+ this, aIterator.Length(), mBufferedData.length()));
+ return LexerResult(TerminalState::FAILURE);
+ }
+
+ MOZ_LOG(sWebPLog, LogLevel::Debug,
+ ("[this=%p] nsWebPDecoder::DoDecode -- buffered %zu -> %zu bytes\n",
+ this, aIterator.Length(), mBufferedData.length()));
+ mData = mBufferedData.begin();
+ mLength = mBufferedData.length();
+ return ReadData();
+}
+
+nsresult nsWebPDecoder::CreateFrame(const OrientedIntRect& aFrameRect) {
+ MOZ_ASSERT(HasSize());
+ MOZ_ASSERT(!mDecoder);
+
+ MOZ_LOG(
+ sWebPLog, LogLevel::Debug,
+ ("[this=%p] nsWebPDecoder::CreateFrame -- frame %u, (%d, %d) %d x %d\n",
+ this, mCurrentFrame, aFrameRect.x, aFrameRect.y, aFrameRect.width,
+ aFrameRect.height));
+
+ if (aFrameRect.width <= 0 || aFrameRect.height <= 0) {
+ MOZ_LOG(sWebPLog, LogLevel::Error,
+ ("[this=%p] nsWebPDecoder::CreateFrame -- bad frame rect\n", this));
+ return NS_ERROR_FAILURE;
+ }
+
+ // If this is our first frame in an animation and it doesn't cover the
+ // full frame, then we are transparent even if there is no alpha
+ if (mCurrentFrame == 0 && !aFrameRect.IsEqualEdges(FullFrame())) {
+ MOZ_ASSERT(HasAnimation());
+ mFormat = SurfaceFormat::OS_RGBA;
+ PostHasTransparency();
+ }
+
+ WebPInitDecBuffer(&mBuffer);
+
+ switch (SurfaceFormat::OS_RGBA) {
+ case SurfaceFormat::B8G8R8A8:
+ mBuffer.colorspace = MODE_BGRA;
+ break;
+ case SurfaceFormat::A8R8G8B8:
+ mBuffer.colorspace = MODE_ARGB;
+ break;
+ case SurfaceFormat::R8G8B8A8:
+ mBuffer.colorspace = MODE_RGBA;
+ break;
+ default:
+ MOZ_ASSERT_UNREACHABLE("Unknown OS_RGBA");
+ return NS_ERROR_FAILURE;
+ }
+
+ mDecoder = WebPINewDecoder(&mBuffer);
+ if (!mDecoder) {
+ MOZ_LOG(sWebPLog, LogLevel::Error,
+ ("[this=%p] nsWebPDecoder::CreateFrame -- create decoder error\n",
+ this));
+ return NS_ERROR_FAILURE;
+ }
+
+ // WebP doesn't guarantee that the alpha generated matches the hint in the
+ // header, so we always need to claim the input is BGRA. If the output is
+ // BGRX, swizzling will mask off the alpha channel.
+ SurfaceFormat inFormat = SurfaceFormat::OS_RGBA;
+
+ SurfacePipeFlags pipeFlags = SurfacePipeFlags();
+ if (mFormat == SurfaceFormat::OS_RGBA &&
+ !(GetSurfaceFlags() & SurfaceFlags::NO_PREMULTIPLY_ALPHA)) {
+ pipeFlags |= SurfacePipeFlags::PREMULTIPLY_ALPHA;
+ }
+
+ Maybe<AnimationParams> animParams;
+ if (!IsFirstFrameDecode()) {
+ animParams.emplace(aFrameRect.ToUnknownRect(), mTimeout, mCurrentFrame,
+ mBlend, mDisposal);
+ }
+
+ Maybe<SurfacePipe> pipe = SurfacePipeFactory::CreateSurfacePipe(
+ this, Size(), OutputSize(), aFrameRect, inFormat, mFormat, animParams,
+ mTransform, pipeFlags);
+ if (!pipe) {
+ MOZ_LOG(sWebPLog, LogLevel::Error,
+ ("[this=%p] nsWebPDecoder::CreateFrame -- no pipe\n", this));
+ return NS_ERROR_FAILURE;
+ }
+
+ mFrameRect = aFrameRect;
+ mPipe = std::move(*pipe);
+ return NS_OK;
+}
+
+void nsWebPDecoder::EndFrame() {
+ MOZ_ASSERT(HasSize());
+ MOZ_ASSERT(mDecoder);
+
+ auto opacity = mFormat == SurfaceFormat::OS_RGBA ? Opacity::SOME_TRANSPARENCY
+ : Opacity::FULLY_OPAQUE;
+
+ MOZ_LOG(sWebPLog, LogLevel::Debug,
+ ("[this=%p] nsWebPDecoder::EndFrame -- frame %u, opacity %d, "
+ "disposal %d, timeout %d, blend %d\n",
+ this, mCurrentFrame, (int)opacity, (int)mDisposal,
+ mTimeout.AsEncodedValueDeprecated(), (int)mBlend));
+
+ PostFrameStop(opacity);
+ WebPIDelete(mDecoder);
+ WebPFreeDecBuffer(&mBuffer);
+ mDecoder = nullptr;
+ mLastRow = 0;
+ ++mCurrentFrame;
+}
+
+void nsWebPDecoder::ApplyColorProfile(const char* aProfile, size_t aLength) {
+ MOZ_ASSERT(!mGotColorProfile);
+ mGotColorProfile = true;
+
+ if (mCMSMode == CMSMode::Off || !GetCMSOutputProfile() ||
+ (mCMSMode == CMSMode::TaggedOnly && !aProfile)) {
+ return;
+ }
+
+ if (!aProfile) {
+ MOZ_LOG(sWebPLog, LogLevel::Debug,
+ ("[this=%p] nsWebPDecoder::ApplyColorProfile -- not tagged, use "
+ "sRGB transform\n",
+ this));
+ mTransform = GetCMSsRGBTransform(SurfaceFormat::OS_RGBA);
+ return;
+ }
+
+ mInProfile = qcms_profile_from_memory(aProfile, aLength);
+ if (!mInProfile) {
+ MOZ_LOG(
+ sWebPLog, LogLevel::Error,
+ ("[this=%p] nsWebPDecoder::ApplyColorProfile -- bad color profile\n",
+ this));
+ return;
+ }
+
+ uint32_t profileSpace = qcms_profile_get_color_space(mInProfile);
+ if (profileSpace != icSigRgbData) {
+ // WebP doesn't produce grayscale data, this must be corrupt.
+ MOZ_LOG(sWebPLog, LogLevel::Error,
+ ("[this=%p] nsWebPDecoder::ApplyColorProfile -- ignoring non-rgb "
+ "color profile\n",
+ this));
+ return;
+ }
+
+ // Calculate rendering intent.
+ int intent = gfxPlatform::GetRenderingIntent();
+ if (intent == -1) {
+ intent = qcms_profile_get_rendering_intent(mInProfile);
+ }
+
+ // Create the color management transform.
+ qcms_data_type type = gfxPlatform::GetCMSOSRGBAType();
+ mTransform = qcms_transform_create(mInProfile, type, GetCMSOutputProfile(),
+ type, (qcms_intent)intent);
+ MOZ_LOG(sWebPLog, LogLevel::Debug,
+ ("[this=%p] nsWebPDecoder::ApplyColorProfile -- use tagged "
+ "transform\n",
+ this));
+}
+
+LexerResult nsWebPDecoder::ReadHeader(WebPDemuxer* aDemuxer, bool aIsComplete) {
+ MOZ_ASSERT(aDemuxer);
+
+ MOZ_LOG(
+ sWebPLog, LogLevel::Debug,
+ ("[this=%p] nsWebPDecoder::ReadHeader -- %zu bytes\n", this, mLength));
+
+ uint32_t flags = WebPDemuxGetI(aDemuxer, WEBP_FF_FORMAT_FLAGS);
+
+ if (!IsMetadataDecode() && !mGotColorProfile) {
+ if (flags & WebPFeatureFlags::ICCP_FLAG) {
+ WebPChunkIterator iter;
+ if (WebPDemuxGetChunk(aDemuxer, "ICCP", 1, &iter)) {
+ ApplyColorProfile(reinterpret_cast<const char*>(iter.chunk.bytes),
+ iter.chunk.size);
+ WebPDemuxReleaseChunkIterator(&iter);
+
+ } else {
+ if (!aIsComplete) {
+ return LexerResult(Yield::NEED_MORE_DATA);
+ }
+
+ MOZ_LOG(sWebPLog, LogLevel::Warning,
+ ("[this=%p] nsWebPDecoder::ReadHeader header specified ICCP "
+ "but no ICCP chunk found, ignoring\n",
+ this));
+
+ ApplyColorProfile(nullptr, 0);
+ }
+ } else {
+ ApplyColorProfile(nullptr, 0);
+ }
+ }
+
+ if (flags & WebPFeatureFlags::ANIMATION_FLAG) {
+ // A metadata decode expects to get the correct first frame timeout which
+ // sadly is not provided by the normal WebP header parsing.
+ WebPIterator iter;
+ if (!WebPDemuxGetFrame(aDemuxer, 1, &iter)) {
+ return aIsComplete ? LexerResult(TerminalState::FAILURE)
+ : LexerResult(Yield::NEED_MORE_DATA);
+ }
+
+ PostIsAnimated(FrameTimeout::FromRawMilliseconds(iter.duration));
+ WebPDemuxReleaseIterator(&iter);
+ } else {
+ // Single frames don't need a demuxer to be created.
+ mNeedDemuxer = false;
+ }
+
+ uint32_t width = WebPDemuxGetI(aDemuxer, WEBP_FF_CANVAS_WIDTH);
+ uint32_t height = WebPDemuxGetI(aDemuxer, WEBP_FF_CANVAS_HEIGHT);
+ if (width > INT32_MAX || height > INT32_MAX) {
+ return LexerResult(TerminalState::FAILURE);
+ }
+
+ PostSize(width, height);
+
+ bool alpha = flags & WebPFeatureFlags::ALPHA_FLAG;
+ if (alpha) {
+ mFormat = SurfaceFormat::OS_RGBA;
+ PostHasTransparency();
+ }
+
+ MOZ_LOG(sWebPLog, LogLevel::Debug,
+ ("[this=%p] nsWebPDecoder::ReadHeader -- %u x %u, alpha %d, "
+ "animation %d, metadata decode %d, first frame decode %d\n",
+ this, width, height, alpha, HasAnimation(), IsMetadataDecode(),
+ IsFirstFrameDecode()));
+
+ if (IsMetadataDecode()) {
+ return LexerResult(TerminalState::SUCCESS);
+ }
+
+ return ReadPayload(aDemuxer, aIsComplete);
+}
+
+LexerResult nsWebPDecoder::ReadPayload(WebPDemuxer* aDemuxer,
+ bool aIsComplete) {
+ if (!HasAnimation()) {
+ auto rv = ReadSingle(mData, mLength, FullFrame());
+ if (rv.is<TerminalState>() &&
+ rv.as<TerminalState>() == TerminalState::SUCCESS) {
+ PostDecodeDone();
+ }
+ return rv;
+ }
+ return ReadMultiple(aDemuxer, aIsComplete);
+}
+
+LexerResult nsWebPDecoder::ReadSingle(const uint8_t* aData, size_t aLength,
+ const OrientedIntRect& aFrameRect) {
+ MOZ_ASSERT(!IsMetadataDecode());
+ MOZ_ASSERT(aData);
+ MOZ_ASSERT(aLength > 0);
+
+ MOZ_LOG(
+ sWebPLog, LogLevel::Debug,
+ ("[this=%p] nsWebPDecoder::ReadSingle -- %zu bytes\n", this, aLength));
+
+ if (!mDecoder && NS_FAILED(CreateFrame(aFrameRect))) {
+ return LexerResult(TerminalState::FAILURE);
+ }
+
+ bool complete;
+ do {
+ VP8StatusCode status = WebPIUpdate(mDecoder, aData, aLength);
+ switch (status) {
+ case VP8_STATUS_OK:
+ complete = true;
+ break;
+ case VP8_STATUS_SUSPENDED:
+ complete = false;
+ break;
+ default:
+ MOZ_LOG(sWebPLog, LogLevel::Error,
+ ("[this=%p] nsWebPDecoder::ReadSingle -- append error %d\n",
+ this, status));
+ return LexerResult(TerminalState::FAILURE);
+ }
+
+ int lastRow = -1;
+ int width = 0;
+ int height = 0;
+ int stride = 0;
+ uint8_t* rowStart =
+ WebPIDecGetRGB(mDecoder, &lastRow, &width, &height, &stride);
+
+ MOZ_LOG(
+ sWebPLog, LogLevel::Debug,
+ ("[this=%p] nsWebPDecoder::ReadSingle -- complete %d, read %d rows, "
+ "has %d rows available\n",
+ this, complete, mLastRow, lastRow));
+
+ if (!rowStart || lastRow == -1 || lastRow == mLastRow) {
+ return LexerResult(Yield::NEED_MORE_DATA);
+ }
+
+ if (width != mFrameRect.width || height != mFrameRect.height ||
+ stride < mFrameRect.width * 4 || lastRow > mFrameRect.height) {
+ MOZ_LOG(sWebPLog, LogLevel::Error,
+ ("[this=%p] nsWebPDecoder::ReadSingle -- bad (w,h,s) = (%d, %d, "
+ "%d)\n",
+ this, width, height, stride));
+ return LexerResult(TerminalState::FAILURE);
+ }
+
+ for (int row = mLastRow; row < lastRow; row++) {
+ uint32_t* src = reinterpret_cast<uint32_t*>(rowStart + row * stride);
+ WriteState result = mPipe.WriteBuffer(src);
+
+ Maybe<SurfaceInvalidRect> invalidRect = mPipe.TakeInvalidRect();
+ if (invalidRect) {
+ PostInvalidation(invalidRect->mInputSpaceRect,
+ Some(invalidRect->mOutputSpaceRect));
+ }
+
+ if (result == WriteState::FAILURE) {
+ MOZ_LOG(sWebPLog, LogLevel::Error,
+ ("[this=%p] nsWebPDecoder::ReadSingle -- write pixels error\n",
+ this));
+ return LexerResult(TerminalState::FAILURE);
+ }
+
+ if (result == WriteState::FINISHED) {
+ MOZ_ASSERT(row == lastRow - 1, "There was more data to read?");
+ complete = true;
+ break;
+ }
+ }
+
+ mLastRow = lastRow;
+ } while (!complete);
+
+ if (!complete) {
+ return LexerResult(Yield::NEED_MORE_DATA);
+ }
+
+ EndFrame();
+ return LexerResult(TerminalState::SUCCESS);
+}
+
+LexerResult nsWebPDecoder::ReadMultiple(WebPDemuxer* aDemuxer,
+ bool aIsComplete) {
+ MOZ_ASSERT(!IsMetadataDecode());
+ MOZ_ASSERT(aDemuxer);
+
+ MOZ_LOG(sWebPLog, LogLevel::Debug,
+ ("[this=%p] nsWebPDecoder::ReadMultiple\n", this));
+
+ bool complete = aIsComplete;
+ WebPIterator iter;
+ auto rv = LexerResult(Yield::NEED_MORE_DATA);
+ if (WebPDemuxGetFrame(aDemuxer, mCurrentFrame + 1, &iter)) {
+ switch (iter.blend_method) {
+ case WEBP_MUX_BLEND:
+ mBlend = BlendMethod::OVER;
+ break;
+ case WEBP_MUX_NO_BLEND:
+ mBlend = BlendMethod::SOURCE;
+ break;
+ default:
+ MOZ_ASSERT_UNREACHABLE("Unhandled blend method");
+ break;
+ }
+
+ switch (iter.dispose_method) {
+ case WEBP_MUX_DISPOSE_NONE:
+ mDisposal = DisposalMethod::KEEP;
+ break;
+ case WEBP_MUX_DISPOSE_BACKGROUND:
+ mDisposal = DisposalMethod::CLEAR;
+ break;
+ default:
+ MOZ_ASSERT_UNREACHABLE("Unhandled dispose method");
+ break;
+ }
+
+ mFormat = iter.has_alpha || mCurrentFrame > 0 ? SurfaceFormat::OS_RGBA
+ : SurfaceFormat::OS_RGBX;
+ mTimeout = FrameTimeout::FromRawMilliseconds(iter.duration);
+ OrientedIntRect frameRect(iter.x_offset, iter.y_offset, iter.width,
+ iter.height);
+
+ rv = ReadSingle(iter.fragment.bytes, iter.fragment.size, frameRect);
+ complete = complete && !WebPDemuxNextFrame(&iter);
+ WebPDemuxReleaseIterator(&iter);
+ }
+
+ if (rv.is<TerminalState>() &&
+ rv.as<TerminalState>() == TerminalState::SUCCESS) {
+ // If we extracted one frame, and it is not the last, we need to yield to
+ // the lexer to allow the upper layers to acknowledge the frame.
+ if (!complete && !IsFirstFrameDecode()) {
+ rv = LexerResult(Yield::OUTPUT_AVAILABLE);
+ } else {
+ uint32_t loopCount = WebPDemuxGetI(aDemuxer, WEBP_FF_LOOP_COUNT);
+
+ MOZ_LOG(sWebPLog, LogLevel::Debug,
+ ("[this=%p] nsWebPDecoder::ReadMultiple -- loop count %u\n", this,
+ loopCount));
+ PostDecodeDone(loopCount - 1);
+ }
+ }
+
+ return rv;
+}
+
+Maybe<Telemetry::HistogramID> nsWebPDecoder::SpeedHistogram() const {
+ return Some(Telemetry::IMAGE_DECODE_SPEED_WEBP);
+}
+
+} // namespace image
+} // namespace mozilla