CVOImage 显示GIF 图片问题 ..... DecompressImageIndirect 失败....

slyzhang 2005-08-08 08:35:46

hFile = CreateFile(pcszFileName, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL );
if (hFile == INVALID_HANDLE_VALUE)
{
AfxMessageBox(L"Open file Error");
return FALSE;
}

// Fill in the 'DecompressImageInfo' structure
dii.dwSize = sizeof( DecompressImageInfo ); // Size of this structure
dii.pbBuffer = szBuffer; // Pointer to the buffer to use for data
dii.dwBufferMax = 1024; // Size of the buffer
dii.dwBufferCurrent = 0; // The amount of data which is current in the buffer
dii.phBM = &m_hbitmap; // Pointer to the bitmap returned (can be NULL)
dii.ppImageRender = NULL; // Pointer to an IImageRender object (can be NULL)
dii.iBitDepth = GetDeviceCaps(hdc,BITSPIXEL); // Bit depth of the output image
dii.lParam = ( LPARAM ) hFile; // User parameter for callback functions
dii.hdc = g_hdc; // HDC to use for retrieving palettes
dii.iScale = g_iScale; // Scale factor (1 - 100)
dii.iMaxWidth = g_iMaxWidth; // Maximum width of the output image
dii.iMaxHeight = g_iMaxHeight; // Maxumum height of the output image
dii.pfnGetData = GetImageData; // Callback function to get image data
dii.pfnImageProgress = ImageProgress; // Callback function to notify caller of progress decoding the image
dii.crTransparentOverride = ( UINT ) -1; // If this color is not (UINT)-1, it will override the
// transparent color in the image with this color. (GIF ONLY)

// Process and decompress the image data
hr = DecompressImageIndirect( &dii );
if (hr == NULL)
{
AfxMessageBox(L"DecompressImageIndirect file Error");
return FALSE;
}

CVOImage 显示GIF 图片问题 ..... DecompressImageIndirect 失败.... hr一直是NULL

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