CMCheckColors

[This is preliminary documentation and subject to change.]

The CMCheckColors function determines whether given colors lie within the output gamut of a specified transform.

BOOL WINAPI CMCheckColors(
  HCMTRANSFORM hcmTransform,  // transform handle
  LPCOLOR lpaInputColors,     // array of COLORs
  DWORD nColors,              // COLOR array size
  COLORTYPE ctInput,          // input color type
  LPBYTE lpaResult            // buffer for results
);
 

Parameters

hcmTransform

Handle to the color transform to use.

lpaInputColors

Pointer to an array of COLOR structures to check against the output gamut.

nColors

Specifies the number of elements in the array.

ctInput

Specifies the input color type.

lpaResult

Pointer to a buffer in which to place an array of bytes containing the test results. Each byte in the buffer corresponds to a COLOR structure, and on exit has been set to an unsigned value between 0 and 255. The value 0 denotes that the color is in gamut, while a nonzero value indicates that it is out of gamut. For any integer n such that 0 < n < 255, a result value of n + 1 indicates that the corresponding color is at least as far out of gamut as would be indicated by a result value of n. These values are usually generated from the gamutTag in the ICC profile.

Return Values

If this function succeeds, the return value is TRUE.

If this function fails, the return value is FALSE. If the function is not successful, the CMM should call SetLastError to set the last error to a valid error value defined in Winerror.h.

Remarks

Every CMM is required to export this function.

If the input color type is not compatible with the color transform CMCheckColors fails.

QuickInfo

  Windows NT: Requires version 5.0 or later.
  Windows: Requires Windows 98.
  Windows CE: Unsupported.
  Header: Declared in wingdi.h.
  Import Library: Use gdi32.lib.

See Also

Color Management Overview, ICM 2.0 Functions