...

1 files changed, 52 insertions, 0 deletions

diff --git a/src/win/graphics/direct/ImageFactory.cpp b/src/win/graphics/direct/ImageFactory.cpp
new file mode 100644
index 00000000..dc43a9b9
--- /dev/null
+++ b/src/win/graphics/direct/ImageFactory.cpp
@@ -0,0 +1,52 @@
+#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