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pRenderTarget->BeginDraw(); //clear screen pRenderTarget->Clear(D2D1::ColorF(D2D1::ColorF::White)); IWICImagingFactory* pIWICFactory = NULL; IWICBitmapDecoder* pDecoder = NULL; IWICBitmapFrameDecode* pFrame = NULL; IWICFormatConverter* pConverter = NULL; ID2D1Bitmap* pBitmap = NULL; CoCreateInstance(CLSID_WICImagingFactory, NULL, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&pIWICFactory) ); //create a decoder hr = pIWICFactory->CreateDecoderFromFilename( TEXT("C:\\Users\\NET45.png"), NULL, GENERIC_READ, WICDecodeMetadataCacheOnLoad, &pDecoder ); // Create the initial frame. hr = pDecoder->GetFrame(0, &pFrame); // Format convert the frame to 32bppPBGRA hr = pIWICFactory->CreateFormatConverter(&pConverter); //Initialize Converter hr = pConverter->Initialize( pFrame, // Input bitmap to convert GUID_WICPixelFormat32bppPBGRA, // Destination pixel format WICBitmapDitherTypeNone, // Specified dither pattern NULL, // Specify a particular palette 0.f, // Alpha threshold WICBitmapPaletteTypeCustom // Palette translation type ); // create Bitmap hr = pRenderTarget->CreateBitmapFromWicBitmap( pConverter, NULL, &pBitmap ); //get bimap size D2D1_SIZE_F size = pBitmap->GetSize() ; D2D1_POINT_2F upperLeftCorner = D2D1::Point2F(0.f, 0.f) ; //draw bitmap pRenderTarget->DrawBitmap( pBitmap, D2D1::RectF( upperLeftCorner.x, upperLeftCorner.y, upperLeftCorner.x + size.width, upperLeftCorner.y + size.height) ) ; pRenderTarget->EndDraw();关于WIC的详细介绍可以参考MSDN:
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