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gecko-dev/image/RasterImage.cpp

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/* -*- 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/. */
// Must #include ImageLogging.h before any IPDL-generated files or other files
// that #include prlog.h
#include "ImageLogging.h"
#include "RasterImage.h"
#include "base/histogram.h"
#include "gfxPlatform.h"
#include "nsComponentManagerUtils.h"
#include "nsError.h"
#include "Decoder.h"
#include "nsAutoPtr.h"
#include "prenv.h"
#include "prsystem.h"
#include "ImageContainer.h"
#include "ImageRegion.h"
#include "Layers.h"
#include "nsPresContext.h"
#include "SourceBuffer.h"
#include "SurfaceCache.h"
#include "FrameAnimator.h"
#include "nsPNGDecoder.h"
#include "nsGIFDecoder2.h"
#include "nsJPEGDecoder.h"
#include "nsBMPDecoder.h"
#include "nsICODecoder.h"
#include "nsIconDecoder.h"
#include "gfxContext.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/Likely.h"
#include "mozilla/RefPtr.h"
#include "mozilla/Move.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/Services.h"
#include <stdint.h>
#include "mozilla/Telemetry.h"
#include "mozilla/TimeStamp.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/gfx/Scale.h"
#include "GeckoProfiler.h"
#include "gfx2DGlue.h"
#include "gfxPrefs.h"
#include <algorithm>
namespace mozilla {
using namespace gfx;
using namespace layers;
namespace image {
using std::ceil;
using std::min;
// The maximum number of times any one RasterImage was decoded. This is only
// used for statistics.
static int32_t sMaxDecodeCount = 0;
/* We define our own error checking macros here for 2 reasons:
*
* 1) Most of the failures we encounter here will (hopefully) be
* the result of decoding failures (ie, bad data) and not code
* failures. As such, we don't want to clutter up debug consoles
* with spurious messages about NS_ENSURE_SUCCESS failures.
*
* 2) We want to set the internal error flag, shutdown properly,
* and end up in an error state.
*
* So this macro should be called when the desired failure behavior
* is to put the container into an error state and return failure.
* It goes without saying that macro won't compile outside of a
* non-static RasterImage method.
*/
#define LOG_CONTAINER_ERROR \
PR_BEGIN_MACRO \
PR_LOG (GetImgLog(), PR_LOG_ERROR, \
("RasterImage: [this=%p] Error " \
"detected at line %u for image of " \
"type %s\n", this, __LINE__, \
mSourceDataMimeType.get())); \
PR_END_MACRO
#define CONTAINER_ENSURE_SUCCESS(status) \
PR_BEGIN_MACRO \
nsresult _status = status; /* eval once */ \
if (NS_FAILED(_status)) { \
LOG_CONTAINER_ERROR; \
DoError(); \
return _status; \
} \
PR_END_MACRO
#define CONTAINER_ENSURE_TRUE(arg, rv) \
PR_BEGIN_MACRO \
if (!(arg)) { \
LOG_CONTAINER_ERROR; \
DoError(); \
return rv; \
} \
PR_END_MACRO
class ScaleRunner : public nsRunnable
{
enum ScaleState
{
eNew,
eReady,
eFinish,
eFinishWithError
};
public:
ScaleRunner(RasterImage* aImage,
uint32_t aImageFlags,
const IntSize& aSize,
RawAccessFrameRef&& aSrcRef)
: mImage(aImage)
, mSrcRef(Move(aSrcRef))
, mDstSize(aSize)
, mImageFlags(aImageFlags)
, mState(eNew)
{
MOZ_ASSERT(!mSrcRef->GetIsPaletted());
MOZ_ASSERT(aSize.width > 0 && aSize.height > 0);
}
bool Init()
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mState == eNew, "Calling Init() twice?");
// We'll need a destination frame. It's unconditionally ARGB32 because
// that's what the scaler outputs.
nsRefPtr<imgFrame> tentativeDstFrame = new imgFrame();
nsresult rv =
tentativeDstFrame->InitForDecoder(mDstSize, SurfaceFormat::B8G8R8A8);
if (NS_FAILED(rv)) {
return false;
}
// We need a strong reference to the raw data for the destination frame.
// (We already got one for the source frame in the constructor.)
RawAccessFrameRef tentativeDstRef = tentativeDstFrame->RawAccessRef();
if (!tentativeDstRef) {
return false;
}
// Everything worked, so commit to these objects and mark ourselves ready.
mDstRef = Move(tentativeDstRef);
mState = eReady;
// Insert the new surface into the cache immediately. We need to do this so
// that we won't start multiple scaling jobs for the same size.
SurfaceCache::Insert(mDstRef.get(), ImageKey(mImage.get()),
RasterSurfaceKey(mDstSize, mImageFlags, 0),
Lifetime::Transient);
return true;
}
NS_IMETHOD Run() override
{
if (mState == eReady) {
// Collect information from the frames that we need to scale.
ScalingData srcData = mSrcRef->GetScalingData();
ScalingData dstData = mDstRef->GetScalingData();
// Actually do the scaling.
bool succeeded =
gfx::Scale(srcData.mRawData, srcData.mSize.width, srcData.mSize.height,
srcData.mBytesPerRow, dstData.mRawData, mDstSize.width,
mDstSize.height, dstData.mBytesPerRow, srcData.mFormat);
if (succeeded) {
// Mark the frame as complete and discardable.
mDstRef->ImageUpdated(mDstRef->GetRect());
MOZ_ASSERT(mDstRef->IsImageComplete(),
"Incomplete, but just updated the entire frame");
}
// We need to send notifications and release our references on the main
// thread, so finish up there.
mState = succeeded ? eFinish : eFinishWithError;
NS_DispatchToMainThread(this);
} else if (mState == eFinish) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mDstRef, "Should have a valid scaled frame");
// Notify, so observers can redraw.
nsRefPtr<RasterImage> image = mImage.get();
if (image) {
image->NotifyNewScaledFrame();
}
// We're done, so release everything.
mSrcRef.reset();
mDstRef.reset();
} else if (mState == eFinishWithError) {
MOZ_ASSERT(NS_IsMainThread());
NS_WARNING("HQ scaling failed");
// Remove the frame from the cache since we know we don't need it.
SurfaceCache::RemoveSurface(ImageKey(mImage.get()),
RasterSurfaceKey(mDstSize,
mImageFlags, 0));
// Release everything we're holding, too.
mSrcRef.reset();
mDstRef.reset();
} else {
// mState must be eNew, which is invalid in Run().
MOZ_ASSERT(false, "Need to call Init() before dispatching");
}
return NS_OK;
}
private:
virtual ~ScaleRunner()
{
MOZ_ASSERT(!mSrcRef && !mDstRef,
"Should have released strong refs in Run()");
}
WeakPtr<RasterImage> mImage;
RawAccessFrameRef mSrcRef;
RawAccessFrameRef mDstRef;
const IntSize mDstSize;
uint32_t mImageFlags;
ScaleState mState;
};
static nsCOMPtr<nsIThread> sScaleWorkerThread = nullptr;
#ifndef DEBUG
NS_IMPL_ISUPPORTS(RasterImage, imgIContainer, nsIProperties)
#else
NS_IMPL_ISUPPORTS(RasterImage, imgIContainer, nsIProperties,
imgIContainerDebug)
#endif
//******************************************************************************
RasterImage::RasterImage(ImageURL* aURI /* = nullptr */) :
ImageResource(aURI), // invoke superclass's constructor
mSize(0,0),
mLockCount(0),
mDecodeCount(0),
mRequestedSampleSize(0),
mLastImageContainerDrawResult(DrawResult::NOT_READY),
#ifdef DEBUG
mFramesNotified(0),
#endif
mSourceBuffer(new SourceBuffer()),
mFrameCount(0),
mHasSize(false),
mDecodeOnlyOnDraw(false),
mTransient(false),
mDiscardable(false),
mHasSourceData(false),
mHasBeenDecoded(false),
mPendingAnimation(false),
mAnimationFinished(false),
mWantFullDecode(false)
{
Telemetry::GetHistogramById(Telemetry::IMAGE_DECODE_COUNT)->Add(0);
}
//******************************************************************************
RasterImage::~RasterImage()
{
// Make sure our SourceBuffer is marked as complete. This will ensure that any
// outstanding decoders terminate.
if (!mSourceBuffer->IsComplete()) {
mSourceBuffer->Complete(NS_ERROR_ABORT);
}
// Release all frames from the surface cache.
SurfaceCache::RemoveImage(ImageKey(this));
}
nsresult
RasterImage::Init(const char* aMimeType,
uint32_t aFlags)
{
// We don't support re-initialization
if (mInitialized) {
return NS_ERROR_ILLEGAL_VALUE;
}
// Not sure an error can happen before init, but be safe
if (mError) {
return NS_ERROR_FAILURE;
}
NS_ENSURE_ARG_POINTER(aMimeType);
// We must be non-discardable and non-decode-only-on-draw for
// transient images.
MOZ_ASSERT(!(aFlags & INIT_FLAG_TRANSIENT) ||
(!(aFlags & INIT_FLAG_DISCARDABLE) &&
!(aFlags & INIT_FLAG_DECODE_ONLY_ON_DRAW) &&
!(aFlags & INIT_FLAG_DOWNSCALE_DURING_DECODE)),
"Illegal init flags for transient image");
// Store initialization data
mSourceDataMimeType.Assign(aMimeType);
mDiscardable = !!(aFlags & INIT_FLAG_DISCARDABLE);
mDecodeOnlyOnDraw = !!(aFlags & INIT_FLAG_DECODE_ONLY_ON_DRAW);
mWantFullDecode = !!(aFlags & INIT_FLAG_DECODE_IMMEDIATELY);
mTransient = !!(aFlags & INIT_FLAG_TRANSIENT);
mDownscaleDuringDecode = !!(aFlags & INIT_FLAG_DOWNSCALE_DURING_DECODE);
#ifndef MOZ_ENABLE_SKIA
// Downscale-during-decode requires Skia.
mDownscaleDuringDecode = false;
#endif
// Lock this image's surfaces in the SurfaceCache if we're not discardable.
if (!mDiscardable) {
mLockCount++;
SurfaceCache::LockImage(ImageKey(this));
}
// Create the initial size decoder.
nsresult rv = Decode(Nothing(), DECODE_FLAGS_DEFAULT);
if (NS_FAILED(rv)) {
return NS_ERROR_FAILURE;
}
// Mark us as initialized
mInitialized = true;
return NS_OK;
}
//******************************************************************************
// [notxpcom] void requestRefresh ([const] in TimeStamp aTime);
NS_IMETHODIMP_(void)
RasterImage::RequestRefresh(const TimeStamp& aTime)
{
if (HadRecentRefresh(aTime)) {
return;
}
EvaluateAnimation();
if (!mAnimating) {
return;
}
FrameAnimator::RefreshResult res;
if (mAnim) {
res = mAnim->RequestRefresh(aTime);
}
if (res.frameAdvanced) {
// Notify listeners that our frame has actually changed, but do this only
// once for all frames that we've now passed (if AdvanceFrame() was called
// more than once).
#ifdef DEBUG
mFramesNotified++;
#endif
NotifyProgress(NoProgress, res.dirtyRect);
}
if (res.animationFinished) {
mAnimationFinished = true;
EvaluateAnimation();
}
}
//******************************************************************************
/* readonly attribute int32_t width; */
NS_IMETHODIMP
RasterImage::GetWidth(int32_t* aWidth)
{
NS_ENSURE_ARG_POINTER(aWidth);
if (mError) {
*aWidth = 0;
return NS_ERROR_FAILURE;
}
*aWidth = mSize.width;
return NS_OK;
}
//******************************************************************************
/* readonly attribute int32_t height; */
NS_IMETHODIMP
RasterImage::GetHeight(int32_t* aHeight)
{
NS_ENSURE_ARG_POINTER(aHeight);
if (mError) {
*aHeight = 0;
return NS_ERROR_FAILURE;
}
*aHeight = mSize.height;
return NS_OK;
}
//******************************************************************************
/* [noscript] readonly attribute nsSize intrinsicSize; */
NS_IMETHODIMP
RasterImage::GetIntrinsicSize(nsSize* aSize)
{
if (mError) {
return NS_ERROR_FAILURE;
}
*aSize = nsSize(nsPresContext::CSSPixelsToAppUnits(mSize.width),
nsPresContext::CSSPixelsToAppUnits(mSize.height));
return NS_OK;
}
//******************************************************************************
/* [noscript] readonly attribute nsSize intrinsicRatio; */
NS_IMETHODIMP
RasterImage::GetIntrinsicRatio(nsSize* aRatio)
{
if (mError) {
return NS_ERROR_FAILURE;
}
*aRatio = nsSize(mSize.width, mSize.height);
return NS_OK;
}
NS_IMETHODIMP_(Orientation)
RasterImage::GetOrientation()
{
return mOrientation;
}
//******************************************************************************
/* unsigned short GetType(); */
NS_IMETHODIMP
RasterImage::GetType(uint16_t* aType)
{
NS_ENSURE_ARG_POINTER(aType);
*aType = imgIContainer::TYPE_RASTER;
return NS_OK;
}
DrawableFrameRef
RasterImage::LookupFrameInternal(uint32_t aFrameNum,
const IntSize& aSize,
uint32_t aFlags)
{
if (!mAnim) {
NS_ASSERTION(aFrameNum == 0,
"Don't ask for a frame > 0 if we're not animated!");
aFrameNum = 0;
}
if (mAnim && aFrameNum > 0) {
MOZ_ASSERT(DecodeFlags(aFlags) == DECODE_FLAGS_DEFAULT,
"Can't composite frames with non-default decode flags");
return mAnim->GetCompositedFrame(aFrameNum);
}
Maybe<uint32_t> alternateFlags;
if (IsOpaque()) {
// If we're opaque, we can always substitute a frame that was decoded with a
// different decode flag for premultiplied alpha, because that can only
// matter for frames with transparency.
alternateFlags = Some(aFlags ^ FLAG_DECODE_NO_PREMULTIPLY_ALPHA);
}
// We don't want any substitution for sync decodes (except the premultiplied
// alpha optimization above), so we use SurfaceCache::Lookup in this case.
if (aFlags & FLAG_SYNC_DECODE) {
return SurfaceCache::Lookup(ImageKey(this),
RasterSurfaceKey(aSize,
DecodeFlags(aFlags),
aFrameNum),
alternateFlags);
}
// We'll return the best match we can find to the requested frame.
return SurfaceCache::LookupBestMatch(ImageKey(this),
RasterSurfaceKey(aSize,
DecodeFlags(aFlags),
aFrameNum),
alternateFlags);
}
DrawableFrameRef
RasterImage::LookupFrame(uint32_t aFrameNum,
const IntSize& aSize,
uint32_t aFlags)
{
MOZ_ASSERT(NS_IsMainThread());
IntSize requestedSize = CanDownscaleDuringDecode(aSize, aFlags)
? aSize : mSize;
DrawableFrameRef ref = LookupFrameInternal(aFrameNum, requestedSize, aFlags);
if (!ref && !mHasSize) {
// We can't request a decode without knowing our intrinsic size. Give up.
return DrawableFrameRef();
}
if (!ref || ref->GetImageSize() != requestedSize) {
// The OS threw this frame away. We need to redecode if we can.
MOZ_ASSERT(!mAnim, "Animated frames should be locked");
Decode(Some(requestedSize), aFlags);
// If we can sync decode, we should already have the frame.
if (aFlags & FLAG_SYNC_DECODE) {
ref = LookupFrameInternal(aFrameNum, requestedSize, aFlags);
}
}
if (!ref) {
// We still weren't able to get a frame. Give up.
return DrawableFrameRef();
}
if (ref->GetCompositingFailed()) {
return DrawableFrameRef();
}
MOZ_ASSERT(!ref || !ref->GetIsPaletted(), "Should not have paletted frame");
// Sync decoding guarantees that we got the frame, but if it's owned by an
// async decoder that's currently running, the contents of the frame may not
// be available yet. Make sure we get everything.
if (ref && mHasSourceData && (aFlags & FLAG_SYNC_DECODE)) {
ref->WaitUntilComplete();
}
return ref;
}
uint32_t
RasterImage::GetCurrentFrameIndex() const
{
if (mAnim) {
return mAnim->GetCurrentAnimationFrameIndex();
}
return 0;
}
uint32_t
RasterImage::GetRequestedFrameIndex(uint32_t aWhichFrame) const
{
return aWhichFrame == FRAME_FIRST ? 0 : GetCurrentFrameIndex();
}
IntRect
RasterImage::GetFirstFrameRect()
{
if (mAnim) {
return mAnim->GetFirstFrameRefreshArea();
}
// Fall back to our size. This is implicitly zero-size if !mHasSize.
return IntRect(IntPoint(0,0), mSize);
}
NS_IMETHODIMP_(bool)
RasterImage::IsOpaque()
{
if (mError) {
return false;
}
Progress progress = mProgressTracker->GetProgress();
// If we haven't yet finished decoding, the safe answer is "not opaque".
if (!(progress & FLAG_DECODE_COMPLETE)) {
return false;
}
// Other, we're opaque if FLAG_HAS_TRANSPARENCY is not set.
return !(progress & FLAG_HAS_TRANSPARENCY);
}
void
RasterImage::OnSurfaceDiscarded()
{
MOZ_ASSERT(mProgressTracker);
nsCOMPtr<nsIRunnable> runnable =
NS_NewRunnableMethod(mProgressTracker, &ProgressTracker::OnDiscard);
NS_DispatchToMainThread(runnable);
}
//******************************************************************************
/* readonly attribute boolean animated; */
NS_IMETHODIMP
RasterImage::GetAnimated(bool* aAnimated)
{
if (mError) {
return NS_ERROR_FAILURE;
}
NS_ENSURE_ARG_POINTER(aAnimated);
// If we have mAnim, we can know for sure
if (mAnim) {
*aAnimated = true;
return NS_OK;
}
// Otherwise, we need to have been decoded to know for sure, since if we were
// decoded at least once mAnim would have been created for animated images
if (!mHasBeenDecoded) {
return NS_ERROR_NOT_AVAILABLE;
}
// We know for sure
*aAnimated = false;
return NS_OK;
}
//******************************************************************************
/* [notxpcom] int32_t getFirstFrameDelay (); */
NS_IMETHODIMP_(int32_t)
RasterImage::GetFirstFrameDelay()
{
if (mError) {
return -1;
}
bool animated = false;
if (NS_FAILED(GetAnimated(&animated)) || !animated) {
return -1;
}
MOZ_ASSERT(mAnim, "Animated images should have a FrameAnimator");
return mAnim->GetTimeoutForFrame(0);
}
TemporaryRef<SourceSurface>
RasterImage::CopyFrame(uint32_t aWhichFrame, uint32_t aFlags)
{
if (aWhichFrame > FRAME_MAX_VALUE) {
return nullptr;
}
if (mError) {
return nullptr;
}
// Get the frame. If it's not there, it's probably the caller's fault for
// not waiting for the data to be loaded from the network or not passing
// FLAG_SYNC_DECODE
DrawableFrameRef frameRef =
LookupFrame(GetRequestedFrameIndex(aWhichFrame), mSize, aFlags);
if (!frameRef) {
// The OS threw this frame away and we couldn't redecode it right now.
return nullptr;
}
// Create a 32-bit image surface of our size, but draw using the frame's
// rect, implicitly padding the frame out to the image's size.
IntSize size(mSize.width, mSize.height);
RefPtr<DataSourceSurface> surf =
Factory::CreateDataSourceSurface(size,
SurfaceFormat::B8G8R8A8,
/* aZero = */ true);
if (NS_WARN_IF(!surf)) {
return nullptr;
}
DataSourceSurface::MappedSurface mapping;
DebugOnly<bool> success =
surf->Map(DataSourceSurface::MapType::WRITE, &mapping);
NS_ASSERTION(success, "Failed to map surface");
RefPtr<DrawTarget> target =
Factory::CreateDrawTargetForData(BackendType::CAIRO,
mapping.mData,
size,
mapping.mStride,
SurfaceFormat::B8G8R8A8);
if (!target) {
gfxWarning() << "RasterImage::CopyFrame failed in CreateDrawTargetForData";
return nullptr;
}
IntRect intFrameRect = frameRef->GetRect();
Rect rect(intFrameRect.x, intFrameRect.y,
intFrameRect.width, intFrameRect.height);
if (frameRef->IsSinglePixel()) {
target->FillRect(rect, ColorPattern(frameRef->SinglePixelColor()),
DrawOptions(1.0f, CompositionOp::OP_SOURCE));
} else {
RefPtr<SourceSurface> srcSurf = frameRef->GetSurface();
if (!srcSurf) {
RecoverFromLossOfFrames(mSize, aFlags);
return nullptr;
}
Rect srcRect(0, 0, intFrameRect.width, intFrameRect.height);
target->DrawSurface(srcSurf, srcRect, rect);
}
target->Flush();
surf->Unmap();
return surf;
}
//******************************************************************************
/* [noscript] SourceSurface getFrame(in uint32_t aWhichFrame,
* in uint32_t aFlags); */
NS_IMETHODIMP_(TemporaryRef<SourceSurface>)
RasterImage::GetFrame(uint32_t aWhichFrame,
uint32_t aFlags)
{
return GetFrameInternal(aWhichFrame, aFlags).second().forget();
}
Pair<DrawResult, RefPtr<SourceSurface>>
RasterImage::GetFrameInternal(uint32_t aWhichFrame, uint32_t aFlags)
{
MOZ_ASSERT(aWhichFrame <= FRAME_MAX_VALUE);
if (aWhichFrame > FRAME_MAX_VALUE) {
return MakePair(DrawResult::BAD_ARGS, RefPtr<SourceSurface>());
}
if (mError) {
return MakePair(DrawResult::BAD_IMAGE, RefPtr<SourceSurface>());
}
// Get the frame. If it's not there, it's probably the caller's fault for
// not waiting for the data to be loaded from the network or not passing
// FLAG_SYNC_DECODE
DrawableFrameRef frameRef =
LookupFrame(GetRequestedFrameIndex(aWhichFrame), mSize, aFlags);
if (!frameRef) {
// The OS threw this frame away and we couldn't redecode it.
return MakePair(DrawResult::TEMPORARY_ERROR, RefPtr<SourceSurface>());
}
// If this frame covers the entire image, we can just reuse its existing
// surface.
RefPtr<SourceSurface> frameSurf;
IntRect frameRect = frameRef->GetRect();
if (frameRect.x == 0 && frameRect.y == 0 &&
frameRect.width == mSize.width &&
frameRect.height == mSize.height) {
frameSurf = frameRef->GetSurface();
}
// The image doesn't have a usable surface because it's been optimized away or
// because it's a partial update frame from an animation. Create one.
if (!frameSurf) {
frameSurf = CopyFrame(aWhichFrame, aFlags);
}
if (!frameRef->IsImageComplete()) {
return MakePair(DrawResult::INCOMPLETE, Move(frameSurf));
}
return MakePair(DrawResult::SUCCESS, Move(frameSurf));
}
Pair<DrawResult, nsRefPtr<layers::Image>>
RasterImage::GetCurrentImage(ImageContainer* aContainer, uint32_t aFlags)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aContainer);
auto result = GetFrameInternal(FRAME_CURRENT, aFlags | FLAG_ASYNC_NOTIFY);
if (!result.second()) {
// The OS threw out some or all of our buffer. We'll need to wait for the
// redecode (which was automatically triggered by GetFrame) to complete.
return MakePair(result.first(), nsRefPtr<layers::Image>());
}
CairoImage::Data cairoData;
GetWidth(&cairoData.mSize.width);
GetHeight(&cairoData.mSize.height);
cairoData.mSourceSurface = result.second();
nsRefPtr<layers::Image> image =
aContainer->CreateImage(ImageFormat::CAIRO_SURFACE);
MOZ_ASSERT(image);
static_cast<CairoImage*>(image.get())->SetData(cairoData);
return MakePair(result.first(), Move(image));
}
NS_IMETHODIMP_(bool)
RasterImage::IsImageContainerAvailable(LayerManager* aManager, uint32_t aFlags)
{
int32_t maxTextureSize = aManager->GetMaxTextureSize();
if (!mHasSize ||
mSize.width > maxTextureSize ||
mSize.height > maxTextureSize) {
return false;
}
return true;
}
NS_IMETHODIMP_(already_AddRefed<ImageContainer>)
RasterImage::GetImageContainer(LayerManager* aManager, uint32_t aFlags)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aManager);
MOZ_ASSERT((aFlags & ~(FLAG_SYNC_DECODE |
FLAG_SYNC_DECODE_IF_FAST |
FLAG_ASYNC_NOTIFY))
== FLAG_NONE,
"Unsupported flag passed to GetImageContainer");
int32_t maxTextureSize = aManager->GetMaxTextureSize();
if (!mHasSize ||
mSize.width > maxTextureSize ||
mSize.height > maxTextureSize) {
return nullptr;
}
if (IsUnlocked() && mProgressTracker) {
mProgressTracker->OnUnlockedDraw();
}
nsRefPtr<layers::ImageContainer> container = mImageContainer.get();
bool mustRedecode =
(aFlags & (FLAG_SYNC_DECODE | FLAG_SYNC_DECODE_IF_FAST)) &&
mLastImageContainerDrawResult != DrawResult::SUCCESS &&
mLastImageContainerDrawResult != DrawResult::BAD_IMAGE;
if (container && !mustRedecode) {
return container.forget();
}
// We need a new ImageContainer, so create one.
container = LayerManager::CreateImageContainer();
auto result = GetCurrentImage(container, aFlags);
if (!result.second()) {
// We couldn't get an Image.
return nullptr;
}
// |result.second()| holds a reference to a SourceSurface which in turn holds
// a lock on the current frame's VolatileBuffer, ensuring that it doesn't get
// freed as long as the layer system keeps this ImageContainer alive.
container->SetCurrentImageInTransaction(result.second());
mLastImageContainerDrawResult = result.first();
mImageContainer = container;
return container.forget();
}
void
RasterImage::UpdateImageContainer()
{
MOZ_ASSERT(NS_IsMainThread());
nsRefPtr<layers::ImageContainer> container = mImageContainer.get();
if (!container) {
return;
}
auto result = GetCurrentImage(container, FLAG_NONE);
if (!result.second()) {
// We couldn't get an Image.
return;
}
mLastImageContainerDrawResult = result.first();
container->SetCurrentImage(result.second());
}
size_t
RasterImage::SizeOfSourceWithComputedFallback(MallocSizeOf aMallocSizeOf) const
{
return mSourceBuffer->SizeOfIncludingThisWithComputedFallback(aMallocSizeOf);
}
void
RasterImage::CollectSizeOfSurfaces(nsTArray<SurfaceMemoryCounter>& aCounters,
MallocSizeOf aMallocSizeOf) const
{
SurfaceCache::CollectSizeOfSurfaces(ImageKey(this), aCounters, aMallocSizeOf);
if (mAnim) {
mAnim->CollectSizeOfCompositingSurfaces(aCounters, aMallocSizeOf);
}
}
class OnAddedFrameRunnable : public nsRunnable
{
public:
OnAddedFrameRunnable(RasterImage* aImage,
uint32_t aNewFrameCount,
const IntRect& aNewRefreshArea)
: mImage(aImage)
, mNewFrameCount(aNewFrameCount)
, mNewRefreshArea(aNewRefreshArea)
{
MOZ_ASSERT(aImage);
}
NS_IMETHOD Run()
{
mImage->OnAddedFrame(mNewFrameCount, mNewRefreshArea);
return NS_OK;
}
private:
nsRefPtr<RasterImage> mImage;
uint32_t mNewFrameCount;
IntRect mNewRefreshArea;
};
void
RasterImage::OnAddedFrame(uint32_t aNewFrameCount,
const IntRect& aNewRefreshArea)
{
if (!NS_IsMainThread()) {
nsCOMPtr<nsIRunnable> runnable =
new OnAddedFrameRunnable(this, aNewFrameCount, aNewRefreshArea);
NS_DispatchToMainThread(runnable);
return;
}
MOZ_ASSERT((mFrameCount == 1 && aNewFrameCount == 1) ||
mFrameCount < aNewFrameCount,
"Frame count running backwards");
if (mError) {
return; // We're in an error state, possibly due to OOM. Bail.
}
if (aNewFrameCount > mFrameCount) {
mFrameCount = aNewFrameCount;
if (aNewFrameCount == 2) {
// We're becoming animated, so initialize animation stuff.
MOZ_ASSERT(!mAnim, "Already have animation state?");
mAnim = MakeUnique<FrameAnimator>(this, mSize, mAnimationMode);
// We don't support discarding animated images (See bug 414259).
// Lock the image and throw away the key.
//
// Note that this is inefficient, since we could get rid of the source
// data too. However, doing this is actually hard, because we're probably
// mid-decode, and thus we're decoding out of the source buffer. Since
// we're going to fix this anyway later, and since we didn't kill the
// source data in the old world either, locking is acceptable for the
// moment.
LockImage();
if (mPendingAnimation && ShouldAnimate()) {
StartAnimation();
}
}
if (aNewFrameCount > 1) {
mAnim->UnionFirstFrameRefreshArea(aNewRefreshArea);
}
}
}
nsresult
RasterImage::SetSize(int32_t aWidth, int32_t aHeight, Orientation aOrientation)
{
MOZ_ASSERT(NS_IsMainThread());
if (mError) {
return NS_ERROR_FAILURE;
}
// Ensure that we have positive values
// XXX - Why isn't the size unsigned? Should this be changed?
if ((aWidth < 0) || (aHeight < 0)) {
return NS_ERROR_INVALID_ARG;
}
// if we already have a size, check the new size against the old one
if (mHasSize &&
((aWidth != mSize.width) ||
(aHeight != mSize.height) ||
(aOrientation != mOrientation))) {
NS_WARNING("Image changed size on redecode! This should not happen!");
DoError();
return NS_ERROR_UNEXPECTED;
}
// Set the size and flag that we have it
mSize.SizeTo(aWidth, aHeight);
mOrientation = aOrientation;
mHasSize = true;
return NS_OK;
}
void
RasterImage::OnDecodingComplete()
{
MOZ_ASSERT(NS_IsMainThread());
if (mError) {
return;
}
// Flag that we've been decoded before.
mHasBeenDecoded = true;
// Let our FrameAnimator know not to expect any more frames.
if (mAnim) {
mAnim->SetDoneDecoding(true);
}
}
NS_IMETHODIMP
RasterImage::SetAnimationMode(uint16_t aAnimationMode)
{
if (mAnim) {
mAnim->SetAnimationMode(aAnimationMode);
}
return SetAnimationModeInternal(aAnimationMode);
}
//******************************************************************************
/* void StartAnimation () */
nsresult
RasterImage::StartAnimation()
{
if (mError) {
return NS_ERROR_FAILURE;
}
MOZ_ASSERT(ShouldAnimate(), "Should not animate!");
// If we don't have mAnim yet, then we're not ready to animate. Setting
// mPendingAnimation will cause us to start animating as soon as we have a
// second frame, which causes mAnim to be constructed.
mPendingAnimation = !mAnim;
if (mPendingAnimation) {
return NS_OK;
}
// A timeout of -1 means we should display this frame forever.
if (mAnim->GetTimeoutForFrame(GetCurrentFrameIndex()) < 0) {
mAnimationFinished = true;
return NS_ERROR_ABORT;
}
// We need to set the time that this initial frame was first displayed, as
// this is used in AdvanceFrame().
mAnim->InitAnimationFrameTimeIfNecessary();
return NS_OK;
}
//******************************************************************************
/* void stopAnimation (); */
nsresult
RasterImage::StopAnimation()
{
MOZ_ASSERT(mAnimating, "Should be animating!");
nsresult rv = NS_OK;
if (mError) {
rv = NS_ERROR_FAILURE;
} else {
mAnim->SetAnimationFrameTime(TimeStamp());
}
mAnimating = false;
return rv;
}
//******************************************************************************
/* void resetAnimation (); */
NS_IMETHODIMP
RasterImage::ResetAnimation()
{
if (mError) {
return NS_ERROR_FAILURE;
}
mPendingAnimation = false;
if (mAnimationMode == kDontAnimMode || !mAnim ||
mAnim->GetCurrentAnimationFrameIndex() == 0) {
return NS_OK;
}
mAnimationFinished = false;
if (mAnimating) {
StopAnimation();
}
MOZ_ASSERT(mAnim, "Should have a FrameAnimator");
mAnim->ResetAnimation();
NotifyProgress(NoProgress, mAnim->GetFirstFrameRefreshArea());
// Start the animation again. It may not have been running before, if
// mAnimationFinished was true before entering this function.
EvaluateAnimation();
return NS_OK;
}
//******************************************************************************
// [notxpcom] void setAnimationStartTime ([const] in TimeStamp aTime);
NS_IMETHODIMP_(void)
RasterImage::SetAnimationStartTime(const TimeStamp& aTime)
{
if (mError || mAnimationMode == kDontAnimMode || mAnimating || !mAnim) {
return;
}
mAnim->SetAnimationFrameTime(aTime);
}
NS_IMETHODIMP_(float)
RasterImage::GetFrameIndex(uint32_t aWhichFrame)
{
MOZ_ASSERT(aWhichFrame <= FRAME_MAX_VALUE, "Invalid argument");
return (aWhichFrame == FRAME_FIRST || !mAnim)
? 0.0f
: mAnim->GetCurrentAnimationFrameIndex();
}
void
RasterImage::SetLoopCount(int32_t aLoopCount)
{
if (mError) {
return;
}
// No need to set this if we're not an animation.
if (mAnim) {
mAnim->SetLoopCount(aLoopCount);
}
}
NS_IMETHODIMP_(IntRect)
RasterImage::GetImageSpaceInvalidationRect(const IntRect& aRect)
{
return aRect;
}
nsresult
RasterImage::OnImageDataComplete(nsIRequest*, nsISupports*, nsresult aStatus,
bool aLastPart)
{
MOZ_ASSERT(NS_IsMainThread());
// Record that we have all the data we're going to get now.
mHasSourceData = true;
// Let decoders know that there won't be any more data coming.
mSourceBuffer->Complete(aStatus);
if (!mHasSize) {
// We need to guarantee that we've gotten the image's size, or at least
// determined that we won't be able to get it, before we deliver the load
// event. That means we have to do a synchronous size decode here.
Decode(Nothing(), FLAG_SYNC_DECODE);
}
// Determine our final status, giving precedence to Necko failure codes. We
// check after running the size decode above in case it triggered an error.
nsresult finalStatus = mError ? NS_ERROR_FAILURE : NS_OK;
if (NS_FAILED(aStatus)) {
finalStatus = aStatus;
}
// If loading failed, report an error.
if (NS_FAILED(finalStatus)) {
DoError();
}
MOZ_ASSERT(mHasSize || mError, "Need to know size before firing load event");
MOZ_ASSERT(!mHasSize ||
(mProgressTracker->GetProgress() & FLAG_SIZE_AVAILABLE),
"Should have notified that the size is available if we have it");
Progress loadProgress = LoadCompleteProgress(aLastPart, mError, finalStatus);
if (mDecodeOnlyOnDraw) {
// For decode-only-on-draw images, we want to send notifications as if we've
// already finished decoding. Otherwise some observers will never even try
// to draw. (We may have already sent some of these notifications from
// NotifyForDecodeOnlyOnDraw(), but ProgressTracker will ensure no duplicate
// notifications get sent.)
loadProgress |= FLAG_ONLOAD_BLOCKED |
FLAG_DECODE_STARTED |
FLAG_FRAME_COMPLETE |
FLAG_DECODE_COMPLETE |
FLAG_ONLOAD_UNBLOCKED;
}
// Notify our listeners, which will fire this image's load event.
NotifyProgress(loadProgress);
return finalStatus;
}
void
RasterImage::NotifyForDecodeOnlyOnDraw()
{
if (!NS_IsMainThread()) {
nsCOMPtr<nsIRunnable> runnable =
NS_NewRunnableMethod(this, &RasterImage::NotifyForDecodeOnlyOnDraw);
NS_DispatchToMainThread(runnable);
return;
}
NotifyProgress(FLAG_DECODE_STARTED | FLAG_ONLOAD_BLOCKED);
}
nsresult
RasterImage::OnImageDataAvailable(nsIRequest*,
nsISupports*,
nsIInputStream* aInStr,
uint64_t aOffset,
uint32_t aCount)
{
nsresult rv;
if (MOZ_UNLIKELY(mDecodeOnlyOnDraw && aOffset == 0)) {
// If we're a decode-only-on-draw image, send notifications as if we've just
// started decoding.
NotifyForDecodeOnlyOnDraw();
}
// WriteToSourceBuffer always consumes everything it gets if it doesn't run
// out of memory.
uint32_t bytesRead;
rv = aInStr->ReadSegments(WriteToSourceBuffer, this, aCount, &bytesRead);
MOZ_ASSERT(bytesRead == aCount || HasError() || NS_FAILED(rv),
"WriteToSourceBuffer should consume everything if ReadSegments succeeds or "
"the image must be in error!");
return rv;
}
nsresult
RasterImage::SetSourceSizeHint(uint32_t aSizeHint)
{
return mSourceBuffer->ExpectLength(aSizeHint);
}
/********* Methods to implement lazy allocation of nsIProperties object *******/
NS_IMETHODIMP
RasterImage::Get(const char* prop, const nsIID& iid, void** result)
{
if (!mProperties) {
return NS_ERROR_FAILURE;
}
return mProperties->Get(prop, iid, result);
}
NS_IMETHODIMP
RasterImage::Set(const char* prop, nsISupports* value)
{
if (!mProperties) {
mProperties = do_CreateInstance("@mozilla.org/properties;1");
}
if (!mProperties) {
return NS_ERROR_OUT_OF_MEMORY;
}
return mProperties->Set(prop, value);
}
NS_IMETHODIMP
RasterImage::Has(const char* prop, bool* _retval)
{
NS_ENSURE_ARG_POINTER(_retval);
if (!mProperties) {
*_retval = false;
return NS_OK;
}
return mProperties->Has(prop, _retval);
}
NS_IMETHODIMP
RasterImage::Undefine(const char* prop)
{
if (!mProperties) {
return NS_ERROR_FAILURE;
}
return mProperties->Undefine(prop);
}
NS_IMETHODIMP
RasterImage::GetKeys(uint32_t* count, char*** keys)
{
if (!mProperties) {
*count = 0;
*keys = nullptr;
return NS_OK;
}
return mProperties->GetKeys(count, keys);
}
void
RasterImage::Discard()
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(CanDiscard(), "Asked to discard but can't");
MOZ_ASSERT(!mAnim, "Asked to discard for animated image");
// Delete all the decoded frames.
SurfaceCache::RemoveImage(ImageKey(this));
// Notify that we discarded.
if (mProgressTracker) {
mProgressTracker->OnDiscard();
}
}
bool
RasterImage::CanDiscard() {
return mHasSourceData && // ...have the source data...
!mAnim; // Can never discard animated images
}
// Sets up a decoder for this image.
already_AddRefed<Decoder>
RasterImage::CreateDecoder(const Maybe<IntSize>& aSize, uint32_t aFlags)
{
// Make sure we actually get size before doing a full decode.
if (aSize) {
MOZ_ASSERT(mHasSize, "Must do a size decode before a full decode!");
MOZ_ASSERT(mDownscaleDuringDecode || *aSize == mSize,
"Can only decode to our intrinsic size if we're not allowed to "
"downscale-during-decode");
} else {
MOZ_ASSERT(!mHasSize, "Should not do unnecessary size decodes");
}
// Figure out which decoder we want.
eDecoderType type = GetDecoderType(mSourceDataMimeType.get());
if (type == eDecoderType_unknown) {
return nullptr;
}
// Instantiate the appropriate decoder.
nsRefPtr<Decoder> decoder;
switch (type) {
case eDecoderType_png:
decoder = new nsPNGDecoder(this);
break;
case eDecoderType_gif:
decoder = new nsGIFDecoder2(this);
break;
case eDecoderType_jpeg:
// If we have all the data we don't want to waste cpu time doing
// a progressive decode.
decoder = new nsJPEGDecoder(this,
mHasBeenDecoded ? Decoder::SEQUENTIAL :
Decoder::PROGRESSIVE);
break;
case eDecoderType_bmp:
decoder = new nsBMPDecoder(this);
break;
case eDecoderType_ico:
decoder = new nsICODecoder(this);
break;
case eDecoderType_icon:
decoder = new nsIconDecoder(this);
break;
default:
MOZ_ASSERT_UNREACHABLE("Unknown decoder type");
}
MOZ_ASSERT(decoder, "Should have a decoder now");
// Initialize the decoder.
decoder->SetSizeDecode(!aSize);
decoder->SetSendPartialInvalidations(!mHasBeenDecoded);
decoder->SetImageIsTransient(mTransient);
decoder->SetFlags(aFlags);
if (!mHasBeenDecoded && aSize) {
// Lock the image while we're decoding, so that it doesn't get evicted from
// the SurfaceCache before we have a chance to realize that it's animated.
// The corresponding unlock happens in FinalizeDecoder.
LockImage();
decoder->SetImageIsLocked();
}
if (aSize) {
// We already have the size; tell the decoder so it can preallocate a
// frame. By default, we create an ARGB frame with no offset. If decoders
// need a different type, they need to ask for it themselves.
// XXX(seth): Note that we call SetSize() and NeedNewFrame() with the
// image's intrinsic size, but AllocateFrame with our target size.
decoder->SetSize(mSize, mOrientation);
decoder->NeedNewFrame(0, 0, 0, aSize->width, aSize->height,
SurfaceFormat::B8G8R8A8);
decoder->AllocateFrame(*aSize);
}
decoder->SetIterator(mSourceBuffer->Iterator());
// Set a target size for downscale-during-decode if applicable.
if (mDownscaleDuringDecode && aSize && *aSize != mSize) {
DebugOnly<nsresult> rv = decoder->SetTargetSize(*aSize);
MOZ_ASSERT(nsresult(rv) != NS_ERROR_NOT_AVAILABLE,
"We're downscale-during-decode but decoder doesn't support it?");
MOZ_ASSERT(NS_SUCCEEDED(rv), "Bad downscale-during-decode target size?");
}
decoder->Init();
if (NS_FAILED(decoder->GetDecoderError())) {
return nullptr;
}
if (!aSize) {
Telemetry::GetHistogramById(
Telemetry::IMAGE_DECODE_COUNT)->Subtract(mDecodeCount);
mDecodeCount++;
Telemetry::GetHistogramById(
Telemetry::IMAGE_DECODE_COUNT)->Add(mDecodeCount);
if (mDecodeCount > sMaxDecodeCount) {
// Don't subtract out 0 from the histogram, because that causes its count
// to go negative, which is not kosher.
if (sMaxDecodeCount > 0) {
Telemetry::GetHistogramById(
Telemetry::IMAGE_MAX_DECODE_COUNT)->Subtract(sMaxDecodeCount);
}
sMaxDecodeCount = mDecodeCount;
Telemetry::GetHistogramById(
Telemetry::IMAGE_MAX_DECODE_COUNT)->Add(sMaxDecodeCount);
}
}
return decoder.forget();
}
//******************************************************************************
/* void requestDecode() */
NS_IMETHODIMP
RasterImage::RequestDecode()
{
// For decode-only-on-draw images, we only act on RequestDecodeForSize.
if (mDecodeOnlyOnDraw) {
return NS_OK;
}
return RequestDecodeForSize(mSize, DECODE_FLAGS_DEFAULT);
}
/* void startDecode() */
NS_IMETHODIMP
RasterImage::StartDecoding()
{
// For decode-only-on-draw images, we only act on RequestDecodeForSize.
if (mDecodeOnlyOnDraw) {
return NS_OK;
}
return RequestDecodeForSize(mSize, FLAG_SYNC_DECODE_IF_FAST);
}
NS_IMETHODIMP
RasterImage::RequestDecodeForSize(const IntSize& aSize, uint32_t aFlags)
{
MOZ_ASSERT(NS_IsMainThread());
if (mError) {
return NS_ERROR_FAILURE;
}
if (!mHasSize) {
mWantFullDecode = true;
return NS_OK;
}
// Fall back to our intrinsic size if we don't support
// downscale-during-decode.
IntSize targetSize = mDownscaleDuringDecode ? aSize : mSize;
// Decide whether to sync decode images we can decode quickly. Here we are
// explicitly trading off flashing for responsiveness in the case that we're
// redecoding an image (see bug 845147).
bool shouldSyncDecodeIfFast =
!mHasBeenDecoded && (aFlags & FLAG_SYNC_DECODE_IF_FAST);
uint32_t flags = shouldSyncDecodeIfFast
? aFlags
: aFlags & ~FLAG_SYNC_DECODE_IF_FAST;
// Look up the first frame of the image, which will implicitly start decoding
// if it's not available right now.
LookupFrame(0, targetSize, flags);
return NS_OK;
}
NS_IMETHODIMP
RasterImage::Decode(const Maybe<IntSize>& aSize, uint32_t aFlags)
{
MOZ_ASSERT(!aSize || NS_IsMainThread());
if (mError) {
return NS_ERROR_FAILURE;
}
// If we don't have a size yet, we can't do any other decoding.
if (!mHasSize && aSize) {
mWantFullDecode = true;
return NS_OK;
}
if (mDownscaleDuringDecode && aSize) {
// We're about to decode again, which may mean that some of the previous
// sizes we've decoded at aren't useful anymore. We can allow them to
// expire from the cache by unlocking them here. When the decode finishes,
// it will send an invalidation that will cause all instances of this image
// to redraw. If this image is locked, any surfaces that are still useful
// will become locked again when LookupFrame touches them, and the remainder
// will eventually expire.
SurfaceCache::UnlockSurfaces(ImageKey(this));
}
// Create a decoder.
nsRefPtr<Decoder> decoder = CreateDecoder(aSize, aFlags);
if (!decoder) {
return NS_ERROR_FAILURE;
}
if (aSize) {
// This isn't a size decode (which doesn't send any early notifications), so
// send out notifications right away.
NotifyProgress(decoder->TakeProgress(),
decoder->TakeInvalidRect(),
decoder->GetDecodeFlags());
}
if (mHasSourceData) {
// If we have all the data, we can sync decode if requested.
if (aFlags & FLAG_SYNC_DECODE) {
PROFILER_LABEL_PRINTF("DecodePool", "SyncDecodeIfPossible",
js::ProfileEntry::Category::GRAPHICS, "%s", GetURIString().get());
DecodePool::Singleton()->SyncDecodeIfPossible(decoder);
return NS_OK;
}
if (aFlags & FLAG_SYNC_DECODE_IF_FAST) {
PROFILER_LABEL_PRINTF("DecodePool", "SyncDecodeIfSmall",
js::ProfileEntry::Category::GRAPHICS, "%s", GetURIString().get());
DecodePool::Singleton()->SyncDecodeIfSmall(decoder);
return NS_OK;
}
}
// Perform an async decode. We also take this path if we don't have all the
// source data yet, since sync decoding is impossible in that situation.
DecodePool::Singleton()->AsyncDecode(decoder);
return NS_OK;
}
void
RasterImage::RecoverFromLossOfFrames(const IntSize& aSize, uint32_t aFlags)
{
if (!mHasSize) {
return;
}
NS_WARNING("An imgFrame became invalid. Attempting to recover...");
// Discard all existing frames, since they're probably all now invalid.
SurfaceCache::RemoveImage(ImageKey(this));
// Animated images require some special handling, because we normally require
// that they never be discarded.
if (mAnim) {
Decode(Some(mSize), aFlags | FLAG_SYNC_DECODE);
ResetAnimation();
return;
}
// For non-animated images, it's fine to recover using an async decode.
Decode(Some(aSize), aFlags);
}
bool
RasterImage::CanScale(GraphicsFilter aFilter,
const IntSize& aSize,
uint32_t aFlags)
{
#ifndef MOZ_ENABLE_SKIA
// The high-quality scaler requires Skia.
return false;
#else
// Check basic requirements: HQ downscaling is enabled, we have all the source
// data and know our size, the flags allow us to do it, and a 'good' filter is
// being used. The flags may ask us not to scale because the caller isn't
// drawing to the window. If we're drawing to something else (e.g. a canvas)
// we usually have no way of updating what we've drawn, so HQ scaling is
// useless.
if (!gfxPrefs::ImageHQDownscalingEnabled() || !mHasSize || !mHasSourceData ||
!(aFlags & imgIContainer::FLAG_HIGH_QUALITY_SCALING) ||
aFilter != GraphicsFilter::FILTER_GOOD) {
return false;
}
// We don't HQ scale images that we can downscale during decode.
if (mDownscaleDuringDecode) {
return false;
}
// We don't use the scaler for animated or transient images to avoid doing a
// bunch of work on an image that just gets thrown away.
if (mAnim || mTransient) {
return false;
}
// If target size is 1:1 with original, don't scale.
if (aSize == mSize) {
return false;
}
// To save memory, don't quality upscale images bigger than the limit.
if (aSize.width > mSize.width || aSize.height > mSize.height) {
uint32_t scaledSize = static_cast<uint32_t>(aSize.width * aSize.height);
if (scaledSize > gfxPrefs::ImageHQUpscalingMaxSize()) {
return false;
}
}
// There's no point in scaling if we can't store the result.
if (!SurfaceCache::CanHold(aSize)) {
return false;
}
// XXX(seth): It's not clear what this check buys us over
// gfxPrefs::ImageHQUpscalingMaxSize().
// The default value of this pref is 1000, which means that we never upscale.
// If that's all it's getting us, I'd rather we just forbid that explicitly.
gfx::Size scale(double(aSize.width) / mSize.width,
double(aSize.height) / mSize.height);
gfxFloat minFactor = gfxPrefs::ImageHQDownscalingMinFactor() / 1000.0;
return (scale.width < minFactor || scale.height < minFactor);
#endif
}
bool
RasterImage::CanDownscaleDuringDecode(const IntSize& aSize, uint32_t aFlags)
{
// Check basic requirements: downscale-during-decode is enabled for this
// image, we have all the source data and know our size, the flags allow us to
// do it, and a 'good' filter is being used.
if (!mDownscaleDuringDecode || !mHasSize ||
!(aFlags & imgIContainer::FLAG_HIGH_QUALITY_SCALING)) {
return false;
}
// We don't downscale animated images during decode.
if (mAnim) {
return false;
}
// Never upscale.
if (aSize.width >= mSize.width || aSize.height >= mSize.height) {
return false;
}
// Zero or negative width or height is unacceptable.
if (aSize.width < 1 || aSize.height < 1) {
return false;
}
// There's no point in scaling if we can't store the result.
if (!SurfaceCache::CanHold(aSize)) {
return false;
}
return true;
}
void
RasterImage::NotifyNewScaledFrame()
{
// Send an invalidation so observers will repaint and can take advantage of
// the new scaled frame if possible.
NotifyProgress(NoProgress, IntRect(0, 0, mSize.width, mSize.height));
}
void
RasterImage::RequestScale(imgFrame* aFrame,
uint32_t aFlags,
const IntSize& aSize)
{
// We don't scale frames which aren't fully decoded.
if (!aFrame->IsImageComplete()) {
return;
}
// We can't scale frames that need padding or are single pixel.
if (aFrame->NeedsPadding() || aFrame->IsSinglePixel()) {
return;
}
// We also can't scale if we can't lock the image data for this frame.
RawAccessFrameRef frameRef = aFrame->RawAccessRef();
if (!frameRef) {
return;
}
nsRefPtr<ScaleRunner> runner =
new ScaleRunner(this, DecodeFlags(aFlags), aSize, Move(frameRef));
if (runner->Init()) {
if (!sScaleWorkerThread) {
NS_NewNamedThread("Image Scaler", getter_AddRefs(sScaleWorkerThread));
ClearOnShutdown(&sScaleWorkerThread);
}
sScaleWorkerThread->Dispatch(runner, NS_DISPATCH_NORMAL);
}
}
DrawResult
RasterImage::DrawWithPreDownscaleIfNeeded(DrawableFrameRef&& aFrameRef,
gfxContext* aContext,
const IntSize& aSize,
const ImageRegion& aRegion,
GraphicsFilter aFilter,
uint32_t aFlags)
{
DrawableFrameRef frameRef;
if (CanScale(aFilter, aSize, aFlags)) {
frameRef =
SurfaceCache::Lookup(ImageKey(this),
RasterSurfaceKey(aSize,
DecodeFlags(aFlags),
0));
if (!frameRef) {
// We either didn't have a matching scaled frame or the OS threw it away.
// Request a new one so we'll be ready next time. For now, we'll fall back
// to aFrameRef below.
RequestScale(aFrameRef.get(), aFlags, aSize);
}
if (frameRef && !frameRef->IsImageComplete()) {
frameRef.reset(); // We're still scaling, so we can't use this yet.
}
}
gfxContextMatrixAutoSaveRestore saveMatrix(aContext);
ImageRegion region(aRegion);
bool frameIsComplete = true; // We already checked HQ scaled frames.
if (!frameRef) {
// There's no HQ scaled frame available, so we'll have to use the frame
// provided by the caller.
frameRef = Move(aFrameRef);
frameIsComplete = frameRef->IsImageComplete();
}
// By now we may have a frame with the requested size. If not, we need to
// adjust the drawing parameters accordingly.
IntSize finalSize = frameRef->GetImageSize();
bool couldRedecodeForBetterFrame = false;
if (finalSize != aSize) {
gfx::Size scale(double(aSize.width) / finalSize.width,
double(aSize.height) / finalSize.height);
aContext->Multiply(gfxMatrix::Scaling(scale.width, scale.height));
region.Scale(1.0 / scale.width, 1.0 / scale.height);
couldRedecodeForBetterFrame = mDownscaleDuringDecode &&
CanDownscaleDuringDecode(aSize, aFlags);
}
if (!frameRef->Draw(aContext, region, aFilter, aFlags)) {
RecoverFromLossOfFrames(aSize, aFlags);
return DrawResult::TEMPORARY_ERROR;
}
if (!frameIsComplete) {
return DrawResult::INCOMPLETE;
}
if (couldRedecodeForBetterFrame) {
return DrawResult::WRONG_SIZE;
}
return DrawResult::SUCCESS;
}
//******************************************************************************
/* [noscript] void draw(in gfxContext aContext,
* in gfxGraphicsFilter aFilter,
* [const] in gfxMatrix aUserSpaceToImageSpace,
* [const] in gfxRect aFill,
* [const] in IntRect aSubimage,
* [const] in IntSize aViewportSize,
* [const] in SVGImageContext aSVGContext,
* in uint32_t aWhichFrame,
* in uint32_t aFlags); */
NS_IMETHODIMP_(DrawResult)
RasterImage::Draw(gfxContext* aContext,
const IntSize& aSize,
const ImageRegion& aRegion,
uint32_t aWhichFrame,
GraphicsFilter aFilter,
const Maybe<SVGImageContext>& /*aSVGContext - ignored*/,
uint32_t aFlags)
{
if (aWhichFrame > FRAME_MAX_VALUE) {
return DrawResult::BAD_ARGS;
}
if (mError) {
return DrawResult::BAD_IMAGE;
}
// Illegal -- you can't draw with non-default decode flags.
// (Disabling colorspace conversion might make sense to allow, but
// we don't currently.)
if (DecodeFlags(aFlags) != DECODE_FLAGS_DEFAULT) {
return DrawResult::BAD_ARGS;
}
if (!aContext) {
return DrawResult::BAD_ARGS;
}
if (IsUnlocked() && mProgressTracker) {
mProgressTracker->OnUnlockedDraw();
}
// If we're not using GraphicsFilter::FILTER_GOOD, we shouldn't high-quality
// scale or downscale during decode.
uint32_t flags = aFilter == GraphicsFilter::FILTER_GOOD
? aFlags
: aFlags & ~FLAG_HIGH_QUALITY_SCALING;
DrawableFrameRef ref =
LookupFrame(GetRequestedFrameIndex(aWhichFrame), aSize, flags);
if (!ref) {
// Getting the frame (above) touches the image and kicks off decoding.
if (mDrawStartTime.IsNull()) {
mDrawStartTime = TimeStamp::Now();
}
return DrawResult::NOT_READY;
}
bool shouldRecordTelemetry = !mDrawStartTime.IsNull() &&
ref->IsImageComplete();
auto result = DrawWithPreDownscaleIfNeeded(Move(ref), aContext, aSize,
aRegion, aFilter, flags);
if (shouldRecordTelemetry) {
TimeDuration drawLatency = TimeStamp::Now() - mDrawStartTime;
Telemetry::Accumulate(Telemetry::IMAGE_DECODE_ON_DRAW_LATENCY,
int32_t(drawLatency.ToMicroseconds()));
mDrawStartTime = TimeStamp();
}
return result;
}
//******************************************************************************
/* void lockImage() */
NS_IMETHODIMP
RasterImage::LockImage()
{
MOZ_ASSERT(NS_IsMainThread(),
"Main thread to encourage serialization with UnlockImage");
if (mError) {
return NS_ERROR_FAILURE;
}
// Increment the lock count
mLockCount++;
// Lock this image's surfaces in the SurfaceCache.
if (mLockCount == 1) {
SurfaceCache::LockImage(ImageKey(this));
}
return NS_OK;
}
//******************************************************************************
/* void unlockImage() */
NS_IMETHODIMP
RasterImage::UnlockImage()
{
MOZ_ASSERT(NS_IsMainThread(),
"Main thread to encourage serialization with LockImage");
if (mError) {
return NS_ERROR_FAILURE;
}
// It's an error to call this function if the lock count is 0
MOZ_ASSERT(mLockCount > 0,
"Calling UnlockImage with mLockCount == 0!");
if (mLockCount == 0) {
return NS_ERROR_ABORT;
}
// Decrement our lock count
mLockCount--;
// Unlock this image's surfaces in the SurfaceCache.
if (mLockCount == 0 ) {
SurfaceCache::UnlockImage(ImageKey(this));
}
return NS_OK;
}
//******************************************************************************
/* void requestDiscard() */
NS_IMETHODIMP
RasterImage::RequestDiscard()
{
if (mDiscardable && // Enabled at creation time...
mLockCount == 0 && // ...not temporarily disabled...
CanDiscard()) {
Discard();
}
return NS_OK;
}
// Indempotent error flagging routine. If a decoder is open, shuts it down.
void
RasterImage::DoError()
{
// If we've flagged an error before, we have nothing to do
if (mError) {
return;
}
// We can't safely handle errors off-main-thread, so dispatch a worker to
// do it.
if (!NS_IsMainThread()) {
HandleErrorWorker::DispatchIfNeeded(this);
return;
}
// Put the container in an error state.
mError = true;
// Stop animation and release our FrameAnimator.
if (mAnimating) {
StopAnimation();
}
mAnim.release();
// Release all locks.
mLockCount = 0;
SurfaceCache::UnlockImage(ImageKey(this));
// Release all frames from the surface cache.
SurfaceCache::RemoveImage(ImageKey(this));
// Invalidate to get rid of any partially-drawn image content.
NotifyProgress(NoProgress, IntRect(0, 0, mSize.width, mSize.height));
// Log our error
LOG_CONTAINER_ERROR;
}
/* static */ void
RasterImage::HandleErrorWorker::DispatchIfNeeded(RasterImage* aImage)
{
nsRefPtr<HandleErrorWorker> worker = new HandleErrorWorker(aImage);
NS_DispatchToMainThread(worker);
}
RasterImage::HandleErrorWorker::HandleErrorWorker(RasterImage* aImage)
: mImage(aImage)
{
MOZ_ASSERT(mImage, "Should have image");
}
NS_IMETHODIMP
RasterImage::HandleErrorWorker::Run()
{
mImage->DoError();
return NS_OK;
}
// nsIInputStream callback to copy the incoming image data directly to the
// RasterImage without processing. The RasterImage is passed as the closure.
// Always reads everything it gets, even if the data is erroneous.
NS_METHOD
RasterImage::WriteToSourceBuffer(nsIInputStream* /* unused */,
void* aClosure,
const char* aFromRawSegment,
uint32_t /* unused */,
uint32_t aCount,
uint32_t* aWriteCount)
{
// Retrieve the RasterImage
RasterImage* image = static_cast<RasterImage*>(aClosure);
// Copy the source data. Unless we hit OOM, we squelch the return value
// here, because returning an error means that ReadSegments stops
// reading data, violating our invariant that we read everything we get.
// If we hit OOM then we fail and the load is aborted.
nsresult rv = image->mSourceBuffer->Append(aFromRawSegment, aCount);
if (rv == NS_ERROR_OUT_OF_MEMORY) {
image->DoError();
return rv;
}
// We wrote everything we got
*aWriteCount = aCount;
return NS_OK;
}
bool
RasterImage::ShouldAnimate()
{
return ImageResource::ShouldAnimate() && GetNumFrames() >= 2 &&
!mAnimationFinished;
}
/* readonly attribute uint32_t framesNotified; */
#ifdef DEBUG
NS_IMETHODIMP
RasterImage::GetFramesNotified(uint32_t* aFramesNotified)
{
NS_ENSURE_ARG_POINTER(aFramesNotified);
*aFramesNotified = mFramesNotified;
return NS_OK;
}
#endif
void
RasterImage::NotifyProgress(Progress aProgress,
const IntRect& aInvalidRect /* = IntRect() */,
uint32_t aFlags /* = DECODE_FLAGS_DEFAULT */)
{
MOZ_ASSERT(NS_IsMainThread());
// Ensure that we stay alive long enough to finish notifying.
nsRefPtr<RasterImage> image(this);
bool wasDefaultFlags = aFlags == DECODE_FLAGS_DEFAULT;
if (!aInvalidRect.IsEmpty() && wasDefaultFlags) {
// Update our image container since we're invalidating.
UpdateImageContainer();
}
// Tell the observers what happened.
image->mProgressTracker->SyncNotifyProgress(aProgress, aInvalidRect);
}
void
RasterImage::FinalizeDecoder(Decoder* aDecoder)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aDecoder);
MOZ_ASSERT(mError || mHasSize || !aDecoder->HasSize(),
"Should have handed off size by now");
// Send out any final notifications.
NotifyProgress(aDecoder->TakeProgress(),
aDecoder->TakeInvalidRect(),
aDecoder->GetDecodeFlags());
bool wasSize = aDecoder->IsSizeDecode();
bool done = aDecoder->GetDecodeDone();
if (!wasSize && aDecoder->ChunkCount()) {
Telemetry::Accumulate(Telemetry::IMAGE_DECODE_CHUNKS,
aDecoder->ChunkCount());
}
if (done) {
// Do some telemetry if this isn't a size decode.
if (!wasSize) {
Telemetry::Accumulate(Telemetry::IMAGE_DECODE_TIME,
int32_t(aDecoder->DecodeTime().ToMicroseconds()));
// We record the speed for only some decoders. The rest have
// SpeedHistogram return HistogramCount.
Telemetry::ID id = aDecoder->SpeedHistogram();
if (id < Telemetry::HistogramCount) {
int32_t KBps = int32_t(aDecoder->BytesDecoded() /
(1024 * aDecoder->DecodeTime().ToSeconds()));
Telemetry::Accumulate(id, KBps);
}
}
// Detect errors.
if (aDecoder->HasError() && !aDecoder->WasAborted()) {
DoError();
} else if (wasSize && !mHasSize) {
DoError();
}
}
if (aDecoder->ImageIsLocked()) {
// Unlock the image, balancing the LockImage call we made in CreateDecoder.
UnlockImage();
}
// If we were a size decode and a full decode was requested, now's the time.
if (done && wasSize && mWantFullDecode) {
mWantFullDecode = false;
RequestDecode();
}
}
already_AddRefed<imgIContainer>
RasterImage::Unwrap()
{
nsCOMPtr<imgIContainer> self(this);
return self.forget();
}
IntSize
RasterImage::OptimalImageSizeForDest(const gfxSize& aDest, uint32_t aWhichFrame,
GraphicsFilter aFilter, uint32_t aFlags)
{
MOZ_ASSERT(aDest.width >= 0 || ceil(aDest.width) <= INT32_MAX ||
aDest.height >= 0 || ceil(aDest.height) <= INT32_MAX,
"Unexpected destination size");
if (mSize.IsEmpty() || aDest.IsEmpty()) {
return IntSize(0, 0);
}
IntSize destSize(ceil(aDest.width), ceil(aDest.height));
if (aFilter == GraphicsFilter::FILTER_GOOD &&
CanDownscaleDuringDecode(destSize, aFlags)) {
return destSize;
} else if (CanScale(aFilter, destSize, aFlags)) {
DrawableFrameRef frameRef =
SurfaceCache::Lookup(ImageKey(this),
RasterSurfaceKey(destSize,
DecodeFlags(aFlags),
0));
if (frameRef && frameRef->IsImageComplete()) {
return destSize; // We have an existing HQ scale for this size.
}
if (!frameRef) {
// We could HQ scale to this size, but we haven't. Request a scale now.
frameRef = LookupFrame(GetRequestedFrameIndex(aWhichFrame),
mSize, aFlags);
if (frameRef) {
RequestScale(frameRef.get(), aFlags, destSize);
}
}
}
// We either can't HQ scale to this size or the scaled version isn't ready
// yet. Use our intrinsic size for now.
return mSize;
}
} // namespace image
} // namespace mozilla
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