bool
YCbCrImageDataSerializer::CopyData(const uint8_t* aYData,
const uint8_t* aCbData, const uint8_t* aCrData,
gfxIntSize aYSize, uint32_t aYStride,
gfxIntSize aCbCrSize, uint32_t aCbCrStride,
uint32_t aYSkip, uint32_t aCbCrSkip)
{
if (!IsValid() || GetYSize() != aYSize || GetCbCrSize() != aCbCrSize) {
return false;
}
for (int i = 0; i < aYSize.height; ++i) {
if (aYSkip == 0) {
// fast path
memcpy(GetYData() + i * GetYStride(),
aYData + i * aYStride,
aYSize.width);
} else {
// slower path
CopyLineWithSkip(aYData + i * aYStride,
GetYData() + i * GetYStride(),
aYSize.width, aYSkip);
}
}
for (int i = 0; i < aCbCrSize.height; ++i) {
if (aCbCrSkip == 0) {
// fast path
memcpy(GetCbData() + i * GetCbCrStride(),
aCbData + i * aCbCrStride,
aCbCrSize.width);
memcpy(GetCrData() + i * GetCbCrStride(),
aCrData + i * aCbCrStride,
aCbCrSize.width);
} else {
// slower path
CopyLineWithSkip(aCbData + i * aCbCrStride,
GetCbData() + i * GetCbCrStride(),
aCbCrSize.width, aCbCrSkip);
CopyLineWithSkip(aCrData + i * aCbCrStride,
GetCrData() + i * GetCbCrStride(),
aCbCrSize.width, aCbCrSkip);
}
}
return true;
}
TemporaryRef<DataSourceSurface>
YCbCrImageDataDeserializer::ToDataSourceSurface()
{
RefPtr<DataSourceSurface> result =
Factory::CreateDataSourceSurface(GetYSize(), gfx::SurfaceFormat::B8G8R8X8);
DataSourceSurface::MappedSurface map;
result->Map(DataSourceSurface::MapType::WRITE, &map);
gfx::ConvertYCbCrToRGB32(GetYData(), GetCbData(), GetCrData(),
map.mData,
0, 0, //pic x and y
GetYSize().width, GetYSize().height,
GetYStride(), GetCbCrStride(),
map.mStride,
gfx::YV12);
result->Unmap();
return result.forget();
}
already_AddRefed<DataSourceSurface>
YCbCrImageDataDeserializer::ToDataSourceSurface()
{
RefPtr<DataSourceSurface> result =
Factory::CreateDataSourceSurface(GetYSize(), gfx::SurfaceFormat::B8G8R8X8);
if (NS_WARN_IF(!result)) {
return nullptr;
}
DataSourceSurface::MappedSurface map;
if (NS_WARN_IF(!result->Map(DataSourceSurface::MapType::WRITE, &map))) {
return nullptr;
}
gfx::ConvertYCbCrToRGB32(GetYData(), GetCbData(), GetCrData(),
map.mData,
0, 0, //pic x and y
GetYSize().width, GetYSize().height,
GetYStride(), GetCbCrStride(),
map.mStride,
gfx::YV12);
result->Unmap();
return result.forget();
}