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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkImageGeneratorWIC.h"
#include "SkIStream.h"
#include "SkStream.h"
// All Windows SDKs back to XPSP2 export the CLSID_WICImagingFactory symbol.
// In the Windows8 SDK the CLSID_WICImagingFactory symbol is still exported
// but CLSID_WICImagingFactory is then #defined to CLSID_WICImagingFactory2.
// Undo this #define if it has been done so that we link against the symbols
// we intended to link against on all SDKs.
#if defined(CLSID_WICImagingFactory)
#undef CLSID_WICImagingFactory
#endif
SkImageGenerator* SkImageGeneratorWIC::NewFromEncodedWIC(SkData* data) {
// Create Windows Imaging Component ImagingFactory.
SkTScopedComPtr<IWICImagingFactory> imagingFactory;
HRESULT hr = CoCreateInstance(CLSID_WICImagingFactory, nullptr, CLSCTX_INPROC_SERVER,
IID_PPV_ARGS(&imagingFactory));
if (FAILED(hr)) {
return nullptr;
}
// Create an IStream.
SkTScopedComPtr<IStream> iStream;
// Note that iStream will take ownership of the new memory stream because
// we set |deleteOnRelease| to true.
hr = SkIStream::CreateFromSkStream(new SkMemoryStream(sk_ref_sp(data)), true, &iStream);
if (FAILED(hr)) {
return nullptr;
}
// Create the decoder from the stream.
SkTScopedComPtr<IWICBitmapDecoder> decoder;
hr = imagingFactory->CreateDecoderFromStream(iStream.get(), nullptr,
WICDecodeMetadataCacheOnDemand, &decoder);
if (FAILED(hr)) {
return nullptr;
}
// Select the first frame from the decoder.
SkTScopedComPtr<IWICBitmapFrameDecode> imageFrame;
hr = decoder->GetFrame(0, &imageFrame);
if (FAILED(hr)) {
return nullptr;
}
// Treat the frame as an image source.
SkTScopedComPtr<IWICBitmapSource> imageSource;
hr = imageFrame->QueryInterface(IID_PPV_ARGS(&imageSource));
if (FAILED(hr)) {
return nullptr;
}
// Get the size of the image.
UINT width;
UINT height;
hr = imageSource->GetSize(&width, &height);
if (FAILED(hr)) {
return nullptr;
}
// Get the encoded pixel format.
WICPixelFormatGUID format;
hr = imageSource->GetPixelFormat(&format);
if (FAILED(hr)) {
return nullptr;
}
// Recommend kOpaque if the image is opaque and kPremul otherwise.
// FIXME: We are stuck recommending kPremul for all indexed formats
// (Ex: GUID_WICPixelFormat8bppIndexed) because we don't have
// a way to check if the image has alpha.
SkAlphaType alphaType = kPremul_SkAlphaType;
if (GUID_WICPixelFormat16bppBGR555 == format ||
GUID_WICPixelFormat16bppBGR565 == format ||
GUID_WICPixelFormat32bppBGR101010 == format ||
GUID_WICPixelFormatBlackWhite == format ||
GUID_WICPixelFormat2bppGray == format ||
GUID_WICPixelFormat4bppGray == format ||
GUID_WICPixelFormat8bppGray == format ||
GUID_WICPixelFormat16bppGray == format ||
GUID_WICPixelFormat16bppGrayFixedPoint == format ||
GUID_WICPixelFormat16bppGrayHalf == format ||
GUID_WICPixelFormat32bppGrayFloat == format ||
GUID_WICPixelFormat32bppGrayFixedPoint == format ||
GUID_WICPixelFormat32bppRGBE == format ||
GUID_WICPixelFormat24bppRGB == format ||
GUID_WICPixelFormat24bppBGR == format ||
GUID_WICPixelFormat32bppBGR == format ||
GUID_WICPixelFormat48bppRGB == format ||
GUID_WICPixelFormat48bppBGR == format ||
GUID_WICPixelFormat48bppRGBFixedPoint == format ||
GUID_WICPixelFormat48bppBGRFixedPoint == format ||
GUID_WICPixelFormat48bppRGBHalf == format ||
GUID_WICPixelFormat64bppRGBFixedPoint == format ||
GUID_WICPixelFormat64bppRGBHalf == format ||
GUID_WICPixelFormat96bppRGBFixedPoint == format ||
GUID_WICPixelFormat128bppRGBFloat == format ||
GUID_WICPixelFormat128bppRGBFixedPoint == format ||
GUID_WICPixelFormat32bppRGB == format ||
GUID_WICPixelFormat64bppRGB == format ||
GUID_WICPixelFormat96bppRGBFloat == format ||
GUID_WICPixelFormat32bppCMYK == format ||
GUID_WICPixelFormat64bppCMYK == format ||
GUID_WICPixelFormat8bppY == format ||
GUID_WICPixelFormat8bppCb == format ||
GUID_WICPixelFormat8bppCr == format ||
GUID_WICPixelFormat16bppCbCr == format)
{
alphaType = kOpaque_SkAlphaType;
}
// FIXME: If we change the implementation to handle swizzling ourselves,
// we can support more output formats.
SkImageInfo info = SkImageInfo::MakeS32(width, height, alphaType);
return new SkImageGeneratorWIC(info, imagingFactory.release(), imageSource.release(), data);
}
SkImageGeneratorWIC::SkImageGeneratorWIC(const SkImageInfo& info,
IWICImagingFactory* imagingFactory, IWICBitmapSource* imageSource, SkData* data)
: INHERITED(info)
, fImagingFactory(imagingFactory)
, fImageSource(imageSource)
, fData(SkRef(data))
{}
SkData* SkImageGeneratorWIC::onRefEncodedData() {
return SkRef(fData.get());
}
bool SkImageGeneratorWIC::onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
const Options&) {
if (kN32_SkColorType != info.colorType()) {
return false;
}
// Create a format converter.
SkTScopedComPtr<IWICFormatConverter> formatConverter;
HRESULT hr = fImagingFactory->CreateFormatConverter(&formatConverter);
if (FAILED(hr)) {
return false;
}
GUID format = GUID_WICPixelFormat32bppPBGRA;
if (kUnpremul_SkAlphaType == info.alphaType()) {
format = GUID_WICPixelFormat32bppBGRA;
}
hr = formatConverter->Initialize(fImageSource.get(), format, WICBitmapDitherTypeNone, nullptr,
0.0, WICBitmapPaletteTypeCustom);
if (FAILED(hr)) {
return false;
}
// Treat the format converter as an image source.
SkTScopedComPtr<IWICBitmapSource> formatConverterSrc;
hr = formatConverter->QueryInterface(IID_PPV_ARGS(&formatConverterSrc));
if (FAILED(hr)) {
return false;
}
// Set the destination pixels.
hr = formatConverterSrc->CopyPixels(nullptr, (UINT) rowBytes, (UINT) rowBytes * info.height(),
(BYTE*) pixels);
return SUCCEEDED(hr);
}
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