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#include "cru/win/graphics/direct/ImageFactory.hpp"
#include "cru/win/graphics/direct/Exception.hpp"
#include "cru/win/graphics/direct/Factory.hpp"
#include "cru/win/graphics/direct/Image.hpp"
#include <wincodec.h>
namespace cru::platform::graphics::win::direct {
WinImageFactory::WinImageFactory(DirectGraphicsFactory* graphics_factory)
: DirectGraphicsResource(graphics_factory) {
HRESULT hr =
CoCreateInstance(CLSID_WICImagingFactory, NULL, CLSCTX_INPROC_SERVER,
IID_PPV_ARGS(&wic_imaging_factory_));
ThrowIfFailed(hr);
}
WinImageFactory::~WinImageFactory() {}
std::unique_ptr<IImage> WinImageFactory::DecodeFromStream(io::Stream* stream) {
// TODO: The correct way to do this is to implement a IStream wrapper.
auto buffer = stream->ReadAll();
HRESULT hr;
Microsoft::WRL::ComPtr<IWICStream> wic_stream;
hr = wic_imaging_factory_->CreateStream(&wic_stream);
ThrowIfFailed(hr);
hr = wic_stream->InitializeFromMemory(
reinterpret_cast<unsigned char*>(buffer.data()), buffer.size());
ThrowIfFailed(hr);
Microsoft::WRL::ComPtr<IWICBitmapDecoder> wic_bitmap_decoder;
hr = wic_imaging_factory_->CreateDecoderFromStream(
wic_stream.Get(), NULL, WICDecodeMetadataCacheOnDemand,
&wic_bitmap_decoder);
ThrowIfFailed(hr);
Microsoft::WRL::ComPtr<IWICBitmapFrameDecode> wic_bitmap_frame_decode;
hr = wic_bitmap_decoder->GetFrame(0, &wic_bitmap_frame_decode);
ThrowIfFailed(hr);
auto d2d_context = graphics_factory_->GetDefaultD2D1DeviceContext();
ID2D1Bitmap* d2d_image;
d2d_context->CreateBitmapFromWicBitmap(wic_bitmap_frame_decode.Get(), NULL,
&d2d_image);
return std::make_unique<Direct2DImage>(graphics_factory_, d2d_image, true);
}
} // namespace cru::platform::graphics::win::direct
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