зеркало из https://github.com/mozilla/gecko-dev.git
418 строки
13 KiB
C++
418 строки
13 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "Image.h"
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#include "Layers.h" // for LayerManager
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#include "nsRefreshDriver.h"
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#include "mozilla/TimeStamp.h"
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#include "mozilla/Tuple.h" // for Tie
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namespace mozilla {
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namespace image {
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///////////////////////////////////////////////////////////////////////////////
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// Memory Reporting
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///////////////////////////////////////////////////////////////////////////////
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ImageMemoryCounter::ImageMemoryCounter(Image* aImage,
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SizeOfState& aState,
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bool aIsUsed)
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: mIsUsed(aIsUsed)
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{
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MOZ_ASSERT(aImage);
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// Extract metadata about the image.
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RefPtr<ImageURL> imageURL(aImage->GetURI());
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if (imageURL) {
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imageURL->GetSpec(mURI);
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}
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int32_t width = 0;
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int32_t height = 0;
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aImage->GetWidth(&width);
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aImage->GetHeight(&height);
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mIntrinsicSize.SizeTo(width, height);
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mType = aImage->GetType();
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// Populate memory counters for source and decoded data.
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mValues.SetSource(aImage->SizeOfSourceWithComputedFallback(aState));
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aImage->CollectSizeOfSurfaces(mSurfaces, aState.mMallocSizeOf);
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// Compute totals.
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for (const SurfaceMemoryCounter& surfaceCounter : mSurfaces) {
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mValues += surfaceCounter.Values();
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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// Image Base Types
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///////////////////////////////////////////////////////////////////////////////
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void
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ImageResource::SetCurrentImage(ImageContainer* aContainer,
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SourceSurface* aSurface,
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bool aInTransaction)
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{
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MOZ_ASSERT(NS_IsMainThread());
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MOZ_ASSERT(aContainer);
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if (!aSurface) {
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// The OS threw out some or all of our buffer. We'll need to wait for the
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// redecode (which was automatically triggered by GetFrame) to complete.
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return;
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}
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// |image| holds a reference to a SourceSurface which in turn holds a lock on
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// the current frame's data buffer, ensuring that it doesn't get freed as
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// long as the layer system keeps this ImageContainer alive.
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RefPtr<layers::Image> image = new layers::SourceSurfaceImage(aSurface);
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// We can share the producer ID with other containers because it is only
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// used internally to validate the frames given to a particular container
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// so that another object cannot add its own. Similarly the frame ID is
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// only used internally to ensure it is always increasing, and skipping
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// IDs from an individual container's perspective is acceptable.
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AutoTArray<ImageContainer::NonOwningImage, 1> imageList;
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imageList.AppendElement(ImageContainer::NonOwningImage(image, TimeStamp(),
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mLastFrameID++,
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mImageProducerID));
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if (aInTransaction) {
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aContainer->SetCurrentImagesInTransaction(imageList);
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} else {
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aContainer->SetCurrentImages(imageList);
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}
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}
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already_AddRefed<ImageContainer>
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ImageResource::GetImageContainerImpl(LayerManager* aManager,
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const IntSize& aSize,
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const Maybe<SVGImageContext>& aSVGContext,
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uint32_t aFlags)
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{
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MOZ_ASSERT(NS_IsMainThread());
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MOZ_ASSERT(aManager);
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MOZ_ASSERT((aFlags & ~(FLAG_SYNC_DECODE |
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FLAG_SYNC_DECODE_IF_FAST |
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FLAG_ASYNC_NOTIFY |
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FLAG_HIGH_QUALITY_SCALING))
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== FLAG_NONE,
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"Unsupported flag passed to GetImageContainer");
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IntSize size = GetImageContainerSize(aManager, aSize, aFlags);
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if (size.IsEmpty()) {
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return nullptr;
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}
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if (mAnimationConsumers == 0) {
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SendOnUnlockedDraw(aFlags);
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}
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uint32_t flags = (aFlags & ~(FLAG_SYNC_DECODE |
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FLAG_SYNC_DECODE_IF_FAST)) | FLAG_ASYNC_NOTIFY;
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RefPtr<layers::ImageContainer> container;
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ImageContainerEntry* entry = nullptr;
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int i = mImageContainers.Length() - 1;
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for (; i >= 0; --i) {
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entry = &mImageContainers[i];
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container = entry->mContainer.get();
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if (size == entry->mSize && flags == entry->mFlags &&
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aSVGContext == entry->mSVGContext) {
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// Lack of a container is handled below.
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break;
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} else if (!container) {
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// Stop tracking if our weak pointer to the image container was freed.
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mImageContainers.RemoveElementAt(i);
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} else {
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// It isn't a match, but still valid. Forget the container so we don't
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// try to reuse it below.
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container = nullptr;
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}
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}
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if (container) {
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switch (entry->mLastDrawResult) {
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case DrawResult::SUCCESS:
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case DrawResult::BAD_IMAGE:
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case DrawResult::BAD_ARGS:
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return container.forget();
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case DrawResult::NOT_READY:
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case DrawResult::INCOMPLETE:
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case DrawResult::TEMPORARY_ERROR:
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// Temporary conditions where we need to rerequest the frame to recover.
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break;
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case DrawResult::WRONG_SIZE:
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// Unused by GetFrameInternal
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default:
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MOZ_ASSERT_UNREACHABLE("Unhandled DrawResult type!");
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return container.forget();
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}
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}
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#ifdef DEBUG
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NotifyDrawingObservers();
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#endif
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DrawResult drawResult;
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IntSize bestSize;
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RefPtr<SourceSurface> surface;
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Tie(drawResult, bestSize, surface) =
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GetFrameInternal(size, aSVGContext, FRAME_CURRENT,
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aFlags | FLAG_ASYNC_NOTIFY);
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// The requested size might be refused by the surface cache (i.e. due to
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// factor-of-2 mode). In that case we don't want to create an entry for this
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// specific size, but rather re-use the entry for the substituted size.
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if (bestSize != size) {
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MOZ_ASSERT(!bestSize.IsEmpty());
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// We can only remove the entry if we no longer have a container, because if
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// there are strong references to it remaining, we need to still update it
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// in UpdateImageContainer.
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if (i >= 0 && !container) {
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mImageContainers.RemoveElementAt(i);
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}
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// Forget about the stale container, if any. This lets the entry creation
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// logic do its job below, if it turns out there is no existing best entry
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// or the best entry doesn't have a container.
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container = nullptr;
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// We need to do the entry search again for the new size. We skip pruning
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// because we did this above once already, but ImageContainer is threadsafe,
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// so there is a remote possibility it got freed.
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i = mImageContainers.Length() - 1;
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for (; i >= 0; --i) {
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entry = &mImageContainers[i];
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if (bestSize == entry->mSize && flags == entry->mFlags &&
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aSVGContext == entry->mSVGContext) {
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container = entry->mContainer.get();
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if (container) {
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switch (entry->mLastDrawResult) {
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case DrawResult::SUCCESS:
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case DrawResult::BAD_IMAGE:
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case DrawResult::BAD_ARGS:
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return container.forget();
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case DrawResult::NOT_READY:
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case DrawResult::INCOMPLETE:
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case DrawResult::TEMPORARY_ERROR:
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// Temporary conditions where we need to rerequest the frame to
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// recover. We have already done so!
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break;
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case DrawResult::WRONG_SIZE:
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// Unused by GetFrameInternal
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default:
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MOZ_ASSERT_UNREACHABLE("Unhandled DrawResult type!");
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return container.forget();
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}
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}
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break;
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}
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}
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}
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if (!container) {
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// We need a new ImageContainer, so create one.
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container = LayerManager::CreateImageContainer();
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if (i >= 0) {
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entry->mContainer = container;
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} else {
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entry = mImageContainers.AppendElement(
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ImageContainerEntry(bestSize, aSVGContext, container.get(), flags));
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}
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}
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SetCurrentImage(container, surface, true);
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entry->mLastDrawResult = drawResult;
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return container.forget();
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}
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void
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ImageResource::UpdateImageContainer()
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{
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MOZ_ASSERT(NS_IsMainThread());
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for (int i = mImageContainers.Length() - 1; i >= 0; --i) {
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ImageContainerEntry& entry = mImageContainers[i];
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RefPtr<ImageContainer> container = entry.mContainer.get();
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if (container) {
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IntSize bestSize;
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RefPtr<SourceSurface> surface;
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Tie(entry.mLastDrawResult, bestSize, surface) =
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GetFrameInternal(entry.mSize, entry.mSVGContext,
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FRAME_CURRENT, entry.mFlags);
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// It is possible that this is a factor-of-2 substitution. Since we
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// managed to convert the weak reference into a strong reference, that
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// means that an imagelib user still is holding onto the container. thus
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// we cannot consolidate and must keep updating the duplicate container.
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SetCurrentImage(container, surface, false);
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} else {
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// Stop tracking if our weak pointer to the image container was freed.
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mImageContainers.RemoveElementAt(i);
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}
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}
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}
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void
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ImageResource::ReleaseImageContainer()
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{
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MOZ_ASSERT(NS_IsMainThread());
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mImageContainers.Clear();
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}
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// Constructor
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ImageResource::ImageResource(ImageURL* aURI) :
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mURI(aURI),
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mInnerWindowId(0),
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mAnimationConsumers(0),
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mAnimationMode(kNormalAnimMode),
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mInitialized(false),
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mAnimating(false),
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mError(false),
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mImageProducerID(ImageContainer::AllocateProducerID()),
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mLastFrameID(0)
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{ }
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ImageResource::~ImageResource()
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{
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// Ask our ProgressTracker to drop its weak reference to us.
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mProgressTracker->ResetImage();
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}
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void
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ImageResource::IncrementAnimationConsumers()
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{
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MOZ_ASSERT(NS_IsMainThread(), "Main thread only to encourage serialization "
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"with DecrementAnimationConsumers");
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mAnimationConsumers++;
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}
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void
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ImageResource::DecrementAnimationConsumers()
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{
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MOZ_ASSERT(NS_IsMainThread(), "Main thread only to encourage serialization "
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"with IncrementAnimationConsumers");
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MOZ_ASSERT(mAnimationConsumers >= 1,
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"Invalid no. of animation consumers!");
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mAnimationConsumers--;
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}
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nsresult
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ImageResource::GetAnimationModeInternal(uint16_t* aAnimationMode)
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{
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if (mError) {
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return NS_ERROR_FAILURE;
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}
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NS_ENSURE_ARG_POINTER(aAnimationMode);
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*aAnimationMode = mAnimationMode;
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return NS_OK;
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}
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nsresult
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ImageResource::SetAnimationModeInternal(uint16_t aAnimationMode)
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{
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if (mError) {
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return NS_ERROR_FAILURE;
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}
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NS_ASSERTION(aAnimationMode == kNormalAnimMode ||
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aAnimationMode == kDontAnimMode ||
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aAnimationMode == kLoopOnceAnimMode,
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"Wrong Animation Mode is being set!");
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mAnimationMode = aAnimationMode;
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return NS_OK;
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}
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bool
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ImageResource::HadRecentRefresh(const TimeStamp& aTime)
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{
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// Our threshold for "recent" is 1/2 of the default refresh-driver interval.
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// This ensures that we allow for frame rates at least as fast as the
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// refresh driver's default rate.
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static TimeDuration recentThreshold =
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TimeDuration::FromMilliseconds(nsRefreshDriver::DefaultInterval() / 2.0);
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if (!mLastRefreshTime.IsNull() &&
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aTime - mLastRefreshTime < recentThreshold) {
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return true;
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}
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// else, we can proceed with a refresh.
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// But first, update our last refresh time:
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mLastRefreshTime = aTime;
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return false;
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}
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void
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ImageResource::EvaluateAnimation()
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{
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if (!mAnimating && ShouldAnimate()) {
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nsresult rv = StartAnimation();
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mAnimating = NS_SUCCEEDED(rv);
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} else if (mAnimating && !ShouldAnimate()) {
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StopAnimation();
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}
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}
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void
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ImageResource::SendOnUnlockedDraw(uint32_t aFlags)
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{
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if (!mProgressTracker) {
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return;
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}
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if (!(aFlags & FLAG_ASYNC_NOTIFY)) {
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mProgressTracker->OnUnlockedDraw();
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} else {
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NotNull<RefPtr<ImageResource>> image = WrapNotNull(this);
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nsCOMPtr<nsIEventTarget> eventTarget = mProgressTracker->GetEventTarget();
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nsCOMPtr<nsIRunnable> ev = NS_NewRunnableFunction(
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"image::ImageResource::SendOnUnlockedDraw", [=]() -> void {
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RefPtr<ProgressTracker> tracker = image->GetProgressTracker();
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if (tracker) {
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tracker->OnUnlockedDraw();
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}
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});
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eventTarget->Dispatch(ev.forget(), NS_DISPATCH_NORMAL);
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}
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}
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#ifdef DEBUG
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void
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ImageResource::NotifyDrawingObservers()
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{
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if (!mURI || !NS_IsMainThread()) {
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return;
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}
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bool match = false;
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if ((NS_FAILED(mURI->SchemeIs("resource", &match)) || !match) &&
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(NS_FAILED(mURI->SchemeIs("chrome", &match)) || !match)) {
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return;
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}
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// Record the image drawing for startup performance testing.
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nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
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NS_WARNING_ASSERTION(obs, "Can't get an observer service handle");
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if (obs) {
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nsCOMPtr<nsIURI> imageURI = mURI->ToIURI();
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nsAutoCString spec;
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imageURI->GetSpec(spec);
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obs->NotifyObservers(nullptr, "image-drawing", NS_ConvertUTF8toUTF16(spec).get());
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}
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}
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#endif
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} // namespace image
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} // namespace mozilla
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