void
CopyableCanvasLayer::UpdateTarget(DrawTarget* aDestTarget)
{
if (!IsDirty())
return;
Painted();
if (mDrawTarget) {
mDrawTarget->Flush();
mSurface = mDrawTarget->Snapshot();
}
if (!mGLContext && aDestTarget) {
NS_ASSERTION(mSurface, "Must have surface to draw!");
if (mSurface) {
aDestTarget->CopySurface(mSurface,
IntRect(0, 0, mBounds.width, mBounds.height),
IntPoint(0, 0));
mSurface = nullptr;
}
return;
}
if (mGLContext) {
SharedSurface_GL* sharedSurf = nullptr;
if (mStream) {
sharedSurf = SharedSurface_GL::Cast(mStream->SwapConsumer());
} else {
sharedSurf = mGLContext->RequestFrame();
}
if (!sharedSurf) {
NS_WARNING("Null frame received.");
return;
}
IntSize readSize(sharedSurf->Size());
SurfaceFormat format = (GetContentFlags() & CONTENT_OPAQUE)
? SurfaceFormat::B8G8R8X8
: SurfaceFormat::B8G8R8A8;
bool needsPremult = sharedSurf->HasAlpha() && !mIsGLAlphaPremult;
// Try to read back directly into aDestTarget's output buffer
if (aDestTarget) {
uint8_t* destData;
IntSize destSize;
int32_t destStride;
SurfaceFormat destFormat;
if (aDestTarget->LockBits(&destData, &destSize, &destStride, &destFormat)) {
if (destSize == readSize && destFormat == format) {
RefPtr<DataSourceSurface> data =
Factory::CreateWrappingDataSourceSurface(destData, destStride, destSize, destFormat);
mGLContext->Screen()->Readback(sharedSurf, data);
if (needsPremult) {
PremultiplySurface(data);
}
aDestTarget->ReleaseBits(destData);
return;
}
aDestTarget->ReleaseBits(destData);
}
}
RefPtr<SourceSurface> resultSurf;
if (sharedSurf->Type() == SharedSurfaceType::Basic && !needsPremult) {
SharedSurface_Basic* sharedSurf_Basic = SharedSurface_Basic::Cast(sharedSurf);
resultSurf = sharedSurf_Basic->GetData();
} else {
RefPtr<DataSourceSurface> data = GetTempSurface(readSize, format);
// Readback handles Flush/MarkDirty.
mGLContext->Screen()->Readback(sharedSurf, data);
if (needsPremult) {
PremultiplySurface(data);
}
resultSurf = data;
}
MOZ_ASSERT(resultSurf);
if (aDestTarget) {
aDestTarget->CopySurface(resultSurf,
IntRect(0, 0, readSize.width, readSize.height),
IntPoint(0, 0));
} else {
// If !aDestSurface then we will end up painting using mSurface, so
// stick our surface into mSurface, so that the Paint() path is the same.
mSurface = resultSurf;
}
}
}
void
CopyableCanvasLayer::UpdateTarget(DrawTarget* aDestTarget)
{
if (!IsDirty())
return;
Painted();
if (mDrawTarget) {
mDrawTarget->Flush();
mSurface = mDrawTarget->Snapshot();
}
if (!mGLContext && aDestTarget) {
NS_ASSERTION(mSurface, "Must have surface to draw!");
if (mSurface) {
aDestTarget->CopySurface(mSurface,
IntRect(0, 0, mBounds.width, mBounds.height),
IntPoint(0, 0));
}
return;
}
if (mGLContext) {
RefPtr<DataSourceSurface> readSurf;
RefPtr<SourceSurface> resultSurf;
SharedSurface_GL* sharedSurf = nullptr;
if (mStream) {
sharedSurf = SharedSurface_GL::Cast(mStream->SwapConsumer());
} else {
sharedSurf = mGLContext->RequestFrame();
}
if (!sharedSurf) {
NS_WARNING("Null frame received.");
return;
}
IntSize readSize(sharedSurf->Size());
SurfaceFormat format = (GetContentFlags() & CONTENT_OPAQUE)
? SurfaceFormat::B8G8R8X8
: SurfaceFormat::B8G8R8A8;
if (aDestTarget) {
resultSurf = aDestTarget->Snapshot();
if (!resultSurf) {
resultSurf = GetTempSurface(readSize, format);
}
} else {
resultSurf = GetTempSurface(readSize, format);
}
MOZ_ASSERT(resultSurf);
MOZ_ASSERT(sharedSurf->APIType() == APITypeT::OpenGL);
SharedSurface_GL* surfGL = SharedSurface_GL::Cast(sharedSurf);
if (surfGL->Type() == SharedSurfaceType::Basic) {
// sharedSurf_Basic->mData must outlive readSurf. Alas, readSurf may not
// leave the scope it was declared in.
SharedSurface_Basic* sharedSurf_Basic = SharedSurface_Basic::Cast(surfGL);
readSurf = sharedSurf_Basic->GetData();
} else {
if (resultSurf->GetSize() != readSize ||
!(readSurf = resultSurf->GetDataSurface()) ||
readSurf->GetFormat() != format)
{
readSurf = GetTempSurface(readSize, format);
}
// Readback handles Flush/MarkDirty.
mGLContext->Screen()->Readback(surfGL, readSurf);
}
MOZ_ASSERT(readSurf);
bool needsPremult = surfGL->HasAlpha() && !mIsGLAlphaPremult;
if (needsPremult) {
PremultiplySurface(readSurf);
}
if (readSurf != resultSurf) {
RefPtr<DataSourceSurface> resultDataSurface =
resultSurf->GetDataSurface();
RefPtr<DrawTarget> dt =
Factory::CreateDrawTargetForData(BackendType::CAIRO,
resultDataSurface->GetData(),
resultDataSurface->GetSize(),
resultDataSurface->Stride(),
resultDataSurface->GetFormat());
IntSize readSize = readSurf->GetSize();
dt->CopySurface(readSurf,
IntRect(0, 0, readSize.width, readSize.height),
IntPoint(0, 0));
}
// If !aDestSurface then we will end up painting using mSurface, so
// stick our surface into mSurface, so that the Paint() path is the same.
if (!aDestTarget) {
mSurface = resultSurf;
}
}
}