ICM_DECOMPRESS_GET_PALETTE message

The ICM_DECOMPRESS_GET_PALETTE message requests that the video decompression driver supply the color table of the output BITMAPINFOHEADER structure. You can send this message explicitly or by using the ICDecompressGetPalette macro.



ICM_DECOMPRESS_GET_PALETTE 
wParam = (DWORD_PTR) (LPVOID) lpbiInput; 
lParam = (DWORD_PTR) (LPVOID) lpbiOutput; 


Parameters

lpbiInput

Pointer to a BITMAPINFOHEADER structure containing the input format.

lpbiOutput

Pointer to a BITMAPINFOHEADER structure to contain the color table. The space reserved for the color table is always at least 256 colors. You can specify zero for this parameter to return only the size of the color table.

Return Value

Returns ICERR_OK if successful or an error otherwise.

Remarks

If lpbiOutput is nonzero, the driver sets the biClrUsed member of BITMAPINFOHEADER to the number of colors in the color table. The driver fills the bmiColors member of BITMAPINFO with the actual colors.

The driver should support this message only if it uses a palette other than the one specified in the input format.

Requirements

Minimum supported client

Windows 2000 Professional [desktop apps only]

Minimum supported server

Windows 2000 Server [desktop apps only]

Header

Vfw.h

See also

Video Compression Manager
Video Compression Messages

 

 

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