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typedef struct _CMYK_PARAMS{L_UINT uStructSize;L_INT nGcr_level; /* value between 0.0 and 1.0 */L_INT nMask;} CMYK_PARAMS, *LPCMYK_PARAMS;
The CMYK_PARAMS structure provides information about CMYK conversion properties.
| Parameter | Description | |
| uStructSize | Size of this structure. | |
| nGcr_level | GCR (Gray Component Replacement) value. Possible values are between 0 and 1000. | |
| nMask | Masking value, currently there is only one used value: | |
| Value | Meaning | |
| CMYK_GCR | Change the nGcr_level. | |
LPCMYK_PARAMS is a pointer to a CMYK_PARAMS structure. Where the function parameter type is LPCMYK_PARAMS, you can declare a CMYK_PARAMS variable, update the structure's fields, and pass the variable's address. Declaring a LPCMYK_PARAMS variable is necessary only if your program requires a pointer.
CMYK_PARAMS is used with the CONVERSION_PARAMS structure.
The mask value will be used only when updating the CMYK conversion using L_ClrSetConversionParams function.
The higher the GCR, the more the gray components are replaced with blackness.