BITMAPV5HEADER BitmapInfo = {sizeof(BITMAPV5HEADER), 512, -256, 1, 32, BI_PNG, BufferLen}; int temp = SetDIBits(m_hDC, m_hBitmap, 0, 256, pBuffer, (BITMAPINFO*)&BitmapInfo, DIB_RGB_COLORS);//m_hBitmap是CreateDIBSection返回得到的
BOOL LoadPngImage(LPCTSTR filename,HBITMAP * hbit) { //查找文件是否存在 if (!FindFile(filename)) { return FALSE; } IImagingFactory* pImageFactory = 0; IImage* pImage = 0; ImageInfo imageInfo; //CoInitializeEx(0, COINIT_MULTITHREADED); HBITMAP hBitmap = 0; LPBYTE lpByte; if (SUCCEEDED(CoCreateInstance(CLSID_ImagingFactory, 0, CLSCTX_INPROC_SERVER, IID_IImagingFactory, (void**)&pImageFactory))) { if (SUCCEEDED(pImageFactory->CreateImageFromFile(filename, &pImage))&& SUCCEEDED(pImage->GetImageInfo(&imageInfo))) { //HDC bmpDC = CreateCompatibleDC(hdc); //LPBYTE lpByte; BITMAPINFO *pbinfo ; pbinfo = (BITMAPINFO *)calloc(1, sizeof(BITMAPINFO) + 4 * sizeof(INT)) ; if(!pbinfo) return FALSE ; pbinfo->bmiHeader.biSize = sizeof (BITMAPINFOHEADER); pbinfo->bmiHeader.biWidth = imageInfo.Width ; pbinfo->bmiHeader.biHeight = imageInfo.Height ; pbinfo->bmiHeader.biPlanes = 1; pbinfo->bmiHeader.biBitCount = 32; pbinfo->bmiHeader.biCompression = BI_ALPHABITFIELDS; pbinfo->bmiHeader.biSizeImage = 0 ; pbinfo->bmiHeader.biXPelsPerMeter = 11811; pbinfo->bmiHeader.biYPelsPerMeter = 11811; pbinfo->bmiHeader.biClrUsed = 0; pbinfo->bmiHeader.biClrImportant = 0; int *pMask = (int*)&(pbinfo->bmiColors[0]) ; *pMask++ = 0x00FF0000 ; *pMask++ = 0x0000FF00 ; *pMask++ = 0x000000FF ; *pMask++ = 0xFF000000 ; hBitmap = CreateDIBSection(NULL, pbinfo, DIB_RGB_COLORS, (void **)&lpByte, NULL, 0) ; free(pbinfo) ; if(!hBitmap || !lpByte) return FALSE ; RECT rect = {0, 0, imageInfo.Width, imageInfo.Height}; IBitmapImage *pBitmapImage; BitmapData bitmapData; bitmapData.Width = imageInfo.Width; bitmapData.Height = imageInfo.Height; bitmapData.PixelFormat = imageInfo.PixelFormat; pBitmapImage = NULL; pImageFactory->CreateBitmapFromImage(pImage, imageInfo.Width, imageInfo.Height, PIXFMT_32BPP_ARGB, InterpolationHintDefault, &pBitmapImage); pBitmapImage->LockBits(&rect, ImageLockModeRead,PIXFMT_32BPP_ARGB, &bitmapData); //transferring the pixels memcpy(lpByte, bitmapData.Scan0, imageInfo.Width * imageInfo.Height * 4); pBitmapImage->UnlockBits(&bitmapData); pBitmapImage->Release(); pImage->Release(); // DeleteDC(bmpDC); } pImageFactory->Release(); } //CoUninitialize(); //ProcessThePixelsWithAlphaChannel Here // vertical flip and ProcessThePixelsWithAlphaChannel here for (UINT y=0; y<imageInfo.Height/2; y++) { BYTE * pPixel = (BYTE *) lpByte + imageInfo.Width * 4 * y; BYTE * pDstPixel = (BYTE*) lpByte + imageInfo.Width * 4 * (imageInfo.Height-y-1); for (UINT x=0; x<imageInfo.Width; x++) { pPixel[0] = pPixel[0] * pPixel[3] / 255; pPixel[1] = pPixel[1] * pPixel[3] / 255; pPixel[2] = pPixel[2] * pPixel[3] / 255; pDstPixel[0] = pDstPixel[0] * pDstPixel[3] / 255; pDstPixel[1] = pDstPixel[1] * pDstPixel[3] / 255; pDstPixel[2] = pDstPixel[2] * pDstPixel[3] / 255; INT* pOrigin = (INT*)pPixel; INT* pDst = (INT*)pDstPixel; INT temp = *pOrigin; *pOrigin = *pDst; *pDst = temp; pPixel += 4; pDstPixel += 4; } } *hbit= hBitmap; if (!hbit) { return FALSE; } return TRUE; }
gdi+和direct3d库都可以做到,但是我不想用 pnglib也行,我还不想用 oleloadpicture为啥就不支持png呢????
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