+#ifdef __MINGW32__
+#define nullptr NULL
+#endif
+#include "DirectXTex.h"
+
+
+/**
+ * Convert between DXGI formats.
+ *
+ */
+static HRESULT
+ConvertFormat(DXGI_FORMAT SrcFormat,
+ void *SrcData,
+ UINT SrcPitch,
+ DXGI_FORMAT DstFormat,
+ void *DstData,
+ UINT DstPitch,
+ UINT Width, UINT Height)
+{
+ HRESULT hr;
+
+ DirectX::Image SrcImage;
+ DirectX::Image DstImage;
+
+ SrcImage.width = Width;
+ SrcImage.height = Height;
+ SrcImage.format = SrcFormat;
+ SrcImage.rowPitch = SrcPitch;
+ SrcImage.slicePitch = Height * SrcPitch;
+ SrcImage.pixels = (uint8_t*)SrcData;
+
+ DstImage.width = Width;
+ DstImage.height = Height;
+ DstImage.format = DstFormat;
+ DstImage.rowPitch = DstPitch;
+ DstImage.slicePitch = Height * DstPitch;
+ DstImage.pixels = (uint8_t*)DstData;
+
+ DirectX::Rect rect(0, 0, Width, Height);
+
+ if (SrcFormat != DstFormat) {
+ DirectX::ScratchImage ScratchImage;
+ ScratchImage.Initialize2D(DstFormat, Width, Height, 1, 1);
+
+ hr = DirectX::Convert(SrcImage, DstFormat, DirectX::TEX_FILTER_DEFAULT, 0.0f, ScratchImage);
+ if (SUCCEEDED(hr)) {
+ hr = CopyRectangle(*ScratchImage.GetImage(0, 0, 0), rect, DstImage, DirectX::TEX_FILTER_DEFAULT, 0, 0);
+ }
+ } else {
+ hr = CopyRectangle(SrcImage, rect, DstImage, DirectX::TEX_FILTER_DEFAULT, 0, 0);
+ }
+
+ return hr;
+}
+