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ICImageCompress
The ICImageCompress function compresses an image to a given size. This function does not require
initialization functions.
HANDLE ICImageCompress(
HIC hic,
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| UINT uiFlags,
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| LPBITMAPINFO lpbiIn,
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| LPVOID lpBits,
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| LPBITMAPINFO lpbiOut,
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| LONG lQuality,
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| LONG * plSize
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| );
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Parameters
hic
Handle of a compressor opened with the ICOpen function. Specify NULL to have VCM select an appropriate compressor for the
compression format. An application can have the user select the compressor by
using the ICCompressorChoose function, which opens the selected compressor and returns a handle of the
compressor in this parameter.
uiFlags
Reserved; must be zero.
lpbiIn
Address of the BITMAPINFO structure containing the input data format.
lpBits
Address of input data bits to compress. The data bits exclude header and
format information.
lpbiOut
Address of the BITMAPINFO structure containing the compressed output format. Specify NULL to have the
compressor use an appropriate format.
lQuality
Quality value used by the compressor. Values range from 0 to 10,000.
plSize
Maximum size desired for the compressed image. The compressor might not be
able to compress the data to fit within this size. When the function returns, this
parameter points to the size of the compressed image. Image sizes are
specified in bytes.
Return Values
Returns a handle to a compressed DIB. The image data follows the format header.
Remarks
To obtain the format information from the LPBITMAPINFOHEADER structure, use the GlobalLock function to lock the data. Use the GlobalFree function to free the DIB when you are finished.
See Also
ICOpen, ICCompressorChoose, BITMAPINFO, GlobalLock, GlobalFree
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