gflContrast

GFL SDK

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gflContrast

The gflContrast function increase or decrease the contrast of a picture. 

GFL_ERROR gflContrast(
  GFL_BITMAP * src,  

  GFL_BITMAP ** dst,  

  GFL_INT32 contrast
);

Parameters

    src
    Pointer to a GFL_BITMAP structure.
    dst
    Address of a pointer to a GFL_BITMAP structure.
    NULL if on the same instance.
    contrast
    An integer between -127 and 127.

Return value

    The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.

See also

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