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#include "cru/win/graphics/direct/ImageFactory.h"
#include "cru/common/platform/win/Exception.h"
#include "cru/common/platform/win/StreamConvert.h"
#include "cru/win/graphics/direct/Exception.h"
#include "cru/win/graphics/direct/Factory.h"
#include "cru/win/graphics/direct/Image.h"
#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) {
HRESULT hr;
Microsoft::WRL::ComPtr<IStream> com_stream(
platform::win::ConvertStreamToComStream(stream));
Microsoft::WRL::ComPtr<IWICBitmapDecoder> wic_bitmap_decoder;
hr = wic_imaging_factory_->CreateDecoderFromStream(
com_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();
Microsoft::WRL::ComPtr<ID2D1Bitmap1> d2d_image;
d2d_context->CreateBitmapFromWicBitmap(wic_bitmap_frame_decode.Get(), NULL,
&d2d_image);
return std::make_unique<Direct2DImage>(graphics_factory_,
std::move(d2d_image));
}
std::unique_ptr<IImage> WinImageFactory::CreateBitmap(int width, int height) {
if (width <= 0) throw Exception(u"Bitmap width must be greater than 0.");
if (height <= 0) throw Exception(u"Bitmap height must be greater than 0.");
Microsoft::WRL::ComPtr<ID2D1Bitmap> bitmap;
auto d2d_context = graphics_factory_->GetDefaultD2D1DeviceContext();
d2d_context->CreateBitmap(
D2D1::SizeU(width, height),
D2D1::BitmapProperties(D2D1::PixelFormat(DXGI_FORMAT_R8G8B8A8_TYPELESS,
D2D1_ALPHA_MODE_STRAIGHT)),
&bitmap);
Microsoft::WRL::ComPtr<ID2D1Bitmap1> bitmap1;
ThrowIfFailed(bitmap.As(&bitmap1), "Failed to convert bitmap to bitmap1.");
return std::make_unique<Direct2DImage>(graphics_factory_, std::move(bitmap1));
}
} // namespace cru::platform::graphics::win::direct
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