bool
RasterImage::StartDecodingWithResult(uint32_t aFlags)
{
if (mError) {
return false;
}
if (!mHasSize) {
mWantFullDecode = true;
return false;
}
uint32_t flags = (aFlags & FLAG_ASYNC_NOTIFY) | FLAG_SYNC_DECODE_IF_FAST;
DrawableSurface surface = RequestDecodeForSizeInternal(mSize, flags);
return surface && surface->IsFinished();
}
Pair<DrawResult, RefPtr<SourceSurface>>
RasterImage::GetFrameInternal(const IntSize& aSize,
uint32_t aWhichFrame,
uint32_t aFlags)
{
MOZ_ASSERT(aWhichFrame <= FRAME_MAX_VALUE);
if (aSize.IsEmpty()) {
return MakePair(DrawResult::BAD_ARGS, RefPtr<SourceSurface>());
}
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.
DrawableSurface surface =
LookupFrame(aSize, aFlags, ToPlaybackType(aWhichFrame));
if (!surface) {
// The OS threw this frame away and we couldn't redecode it.
return MakePair(DrawResult::TEMPORARY_ERROR, RefPtr<SourceSurface>());
}
RefPtr<SourceSurface> sourceSurface = surface->GetSourceSurface();
if (!surface->IsFinished()) {
return MakePair(DrawResult::INCOMPLETE, Move(sourceSurface));
}
return MakePair(DrawResult::SUCCESS, Move(sourceSurface));
}
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;
}
