DrawResult
RasterImage::DrawInternal(DrawableSurface&& aSurface,
gfxContext* aContext,
const IntSize& aSize,
const ImageRegion& aRegion,
SamplingFilter aSamplingFilter,
uint32_t aFlags,
float aOpacity)
{
gfxContextMatrixAutoSaveRestore saveMatrix(aContext);
ImageRegion region(aRegion);
bool frameIsFinished = aSurface->IsFinished();
// By now we may have a frame with the requested size. If not, we need to
// adjust the drawing parameters accordingly.
IntSize finalSize = aSurface->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 = CanDownscaleDuringDecode(aSize, aFlags);
}
if (!aSurface->Draw(aContext, region, aSamplingFilter, aFlags, aOpacity)) {
RecoverFromInvalidFrames(aSize, aFlags);
return DrawResult::TEMPORARY_ERROR;
}
if (!frameIsFinished) {
return DrawResult::INCOMPLETE;
}
if (couldRedecodeForBetterFrame) {
return DrawResult::WRONG_SIZE;
}
return DrawResult::SUCCESS;
}
void
RasterImage::NotifyDecodeComplete(const DecoderFinalStatus& aStatus,
const ImageMetadata& aMetadata,
const DecoderTelemetry& aTelemetry,
Progress aProgress,
const IntRect& aInvalidRect,
const Maybe<uint32_t>& aFrameCount,
DecoderFlags aDecoderFlags,
SurfaceFlags aSurfaceFlags)
{
MOZ_ASSERT(NS_IsMainThread());
// If the decoder detected an error, log it to the error console.
if (aStatus.mShouldReportError && !aStatus.mWasAborted) {
ReportDecoderError();
}
// Record all the metadata the decoder gathered about this image.
bool metadataOK = SetMetadata(aMetadata, aStatus.mWasMetadataDecode);
if (!metadataOK) {
// This indicates a serious error that requires us to discard all existing
// surfaces and redecode to recover. We'll drop the results from this
// decoder on the floor, since they aren't valid.
RecoverFromInvalidFrames(mSize,
FromSurfaceFlags(aSurfaceFlags));
return;
}
MOZ_ASSERT(mError || mHasSize || !aMetadata.HasSize(),
"SetMetadata should've gotten a size");
if (!aStatus.mWasMetadataDecode && aStatus.mFinished && !aStatus.mWasAborted) {
// Flag that we've been decoded before.
mHasBeenDecoded = true;
}
// Send out any final notifications.
NotifyProgress(aProgress, aInvalidRect, aFrameCount,
aDecoderFlags, aSurfaceFlags);
if (!(aDecoderFlags & DecoderFlags::FIRST_FRAME_ONLY) &&
mHasBeenDecoded && mAnimationState) {
// We've finished a full decode of all animation frames and our AnimationState
// has been notified about them all, so let it know not to expect anymore.
mAnimationState->SetDoneDecoding(true);
}
if (!aStatus.mWasMetadataDecode && aTelemetry.mChunkCount) {
Telemetry::Accumulate(Telemetry::IMAGE_DECODE_CHUNKS, aTelemetry.mChunkCount);
}
if (aStatus.mFinished) {
// Do some telemetry if this isn't a metadata decode.
if (!aStatus.mWasMetadataDecode) {
Telemetry::Accumulate(Telemetry::IMAGE_DECODE_TIME,
int32_t(aTelemetry.mDecodeTime.ToMicroseconds()));
if (aTelemetry.mSpeedHistogram) {
Telemetry::Accumulate(*aTelemetry.mSpeedHistogram, aTelemetry.Speed());
}
}
// Detect errors.
if (aStatus.mHadError && !aStatus.mWasAborted) {
DoError();
} else if (aStatus.mWasMetadataDecode && !mHasSize) {
DoError();
}
// If we were waiting to fire the load event, go ahead and fire it now.
if (mLoadProgress && aStatus.mWasMetadataDecode) {
NotifyForLoadEvent(*mLoadProgress);
mLoadProgress = Nothing();
NotifyProgress(FLAG_ONLOAD_UNBLOCKED);
}
}
// If we were a metadata decode and a full decode was requested, do it.
if (aStatus.mFinished && aStatus.mWasMetadataDecode && mWantFullDecode) {
mWantFullDecode = false;
RequestDecodeForSize(mSize, DECODE_FLAGS_DEFAULT);
}
}