LookupResult
RasterImage::LookupFrameInternal(const IntSize& aSize,
uint32_t aFlags,
PlaybackType aPlaybackType)
{
if (mAnimationState && aPlaybackType == PlaybackType::eAnimated) {
MOZ_ASSERT(mFrameAnimator);
MOZ_ASSERT(ToSurfaceFlags(aFlags) == DefaultSurfaceFlags(),
"Can't composite frames with non-default surface flags");
const size_t index = mAnimationState->GetCurrentAnimationFrameIndex();
return mFrameAnimator->GetCompositedFrame(index);
}
SurfaceFlags surfaceFlags = ToSurfaceFlags(aFlags);
// We don't want any substitution for sync decodes, and substitution would be
// illegal when high quality downscaling is disabled, so we use
// SurfaceCache::Lookup in this case.
if ((aFlags & FLAG_SYNC_DECODE) || !(aFlags & FLAG_HIGH_QUALITY_SCALING)) {
return SurfaceCache::Lookup(ImageKey(this),
RasterSurfaceKey(aSize,
surfaceFlags,
PlaybackType::eStatic));
}
// We'll return the best match we can find to the requested frame.
return SurfaceCache::LookupBestMatch(ImageKey(this),
RasterSurfaceKey(aSize,
surfaceFlags,
PlaybackType::eStatic));
}
/* static */ already_AddRefed<gfx::SourceSurface>
ImageOps::DecodeToSurface(nsIInputStream* aInputStream,
const nsACString& aMimeType,
uint32_t aFlags)
{
MOZ_ASSERT(aInputStream);
nsresult rv;
// Prepare the input stream.
nsCOMPtr<nsIInputStream> inputStream = aInputStream;
if (!NS_InputStreamIsBuffered(aInputStream)) {
nsCOMPtr<nsIInputStream> bufStream;
rv = NS_NewBufferedInputStream(getter_AddRefs(bufStream),
aInputStream, 1024);
if (NS_SUCCEEDED(rv)) {
inputStream = bufStream;
}
}
// Figure out how much data we've been passed.
uint64_t length;
rv = inputStream->Available(&length);
if (NS_FAILED(rv) || length > UINT32_MAX) {
return nullptr;
}
// Write the data into a SourceBuffer.
RefPtr<SourceBuffer> sourceBuffer = new SourceBuffer();
sourceBuffer->ExpectLength(length);
rv = sourceBuffer->AppendFromInputStream(inputStream, length);
if (NS_FAILED(rv)) {
return nullptr;
}
sourceBuffer->Complete(NS_OK);
// Create a decoder.
DecoderType decoderType =
DecoderFactory::GetDecoderType(PromiseFlatCString(aMimeType).get());
RefPtr<Decoder> decoder =
DecoderFactory::CreateAnonymousDecoder(decoderType,
sourceBuffer,
ToSurfaceFlags(aFlags));
if (!decoder) {
return nullptr;
}
// Run the decoder synchronously.
decoder->Decode();
if (!decoder->GetDecodeDone() || decoder->HasError()) {
return nullptr;
}
// Pull out the surface.
RawAccessFrameRef frame = decoder->GetCurrentFrameRef();
if (!frame) {
return nullptr;
}
RefPtr<SourceSurface> surface = frame->GetSurface();
if (!surface) {
return nullptr;
}
return surface.forget();
}
RasterImage::Draw(gfxContext* aContext,
const IntSize& aSize,
const ImageRegion& aRegion,
uint32_t aWhichFrame,
SamplingFilter aSamplingFilter,
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 (ToSurfaceFlags(aFlags) != DefaultSurfaceFlags()) {
return DrawResult::BAD_ARGS;
}
if (!aContext) {
return DrawResult::BAD_ARGS;
}
if (IsUnlocked() && mProgressTracker) {
mProgressTracker->OnUnlockedDraw();
}
// If we're not using SamplingFilter::GOOD, we shouldn't high-quality scale or
// downscale during decode.
uint32_t flags = aSamplingFilter == SamplingFilter::GOOD
? aFlags
: aFlags & ~FLAG_HIGH_QUALITY_SCALING;
DrawableSurface surface =
LookupFrame(aSize, flags, ToPlaybackType(aWhichFrame));
if (!surface) {
// 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() &&
surface->IsFinished();
auto result = DrawInternal(Move(surface), aContext, aSize,
aRegion, aSamplingFilter, flags);
if (shouldRecordTelemetry) {
TimeDuration drawLatency = TimeStamp::Now() - mDrawStartTime;
Telemetry::Accumulate(Telemetry::IMAGE_DECODE_ON_DRAW_LATENCY,
int32_t(drawLatency.ToMicroseconds()));
mDrawStartTime = TimeStamp();
}
return result;
}
NS_IMETHODIMP
RasterImage::Decode(const IntSize& aSize,
uint32_t aFlags,
PlaybackType aPlaybackType)
{
MOZ_ASSERT(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) {
mWantFullDecode = true;
return NS_OK;
}
// 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::UnlockEntries(ImageKey(this));
// Determine which flags we need to decode this image with.
DecoderFlags decoderFlags = DefaultDecoderFlags();
if (aFlags & FLAG_ASYNC_NOTIFY) {
decoderFlags |= DecoderFlags::ASYNC_NOTIFY;
}
if (mTransient) {
decoderFlags |= DecoderFlags::IMAGE_IS_TRANSIENT;
}
if (mHasBeenDecoded) {
decoderFlags |= DecoderFlags::IS_REDECODE;
}
SurfaceFlags surfaceFlags = ToSurfaceFlags(aFlags);
if (IsOpaque()) {
// If there's no transparency, it doesn't matter whether we premultiply
// alpha or not.
surfaceFlags &= ~SurfaceFlags::NO_PREMULTIPLY_ALPHA;
}
// Create a decoder.
RefPtr<IDecodingTask> task;
if (mAnimationState && aPlaybackType == PlaybackType::eAnimated) {
task = DecoderFactory::CreateAnimationDecoder(mDecoderType, WrapNotNull(this),
mSourceBuffer, mSize,
decoderFlags, surfaceFlags);
} else {
task = DecoderFactory::CreateDecoder(mDecoderType, WrapNotNull(this),
mSourceBuffer, mSize, aSize,
decoderFlags, surfaceFlags,
mRequestedSampleSize);
}
// Make sure DecoderFactory was able to create a decoder successfully.
if (!task) {
return NS_ERROR_FAILURE;
}
mDecodeCount++;
// We're ready to decode; start the decoder.
LaunchDecodingTask(task, this, aFlags, mHasSourceData);
return NS_OK;
}
