CMM Transform Creation Flags
CMMs use transform creation flags as hints for how to create a color transform. It is up to the CMM to determine how best to use these flags.
All of the functions that use these flags pass or receive flag values through a parameter called dwFlags. The high-order WORD of dwFlags should be set to a value from the following table.
| Constant | Description |
|---|---|
| ENABLE_GAMUT_CHECKING | Use this transform for gamut checking. |
| USE_RELATIVE_COLORIMETRIC | Do not preserve the white point. If the output gamut does not support a given color, use the nearest supported color. See Rendering Intents. |
| FAST_TRANSLATE | Look up color only. Do not interpolate the color. |
| PRESERVEBLACK | Inserts the appropriate black generation GMMP as the last GMMP in the transform sequence |
| WCS_ALWAYS | Use the WCS code path even for ICC transforms. |
| SEQUENTIAL_TRANSFORM | Transform creation flag for creating a sequential (non-optimized) color transform. |
The low-order WORD can have one of the following constant values.
| Constant | Description |
|---|---|
| PROOF_MODE | Transform will be used to preview the image. Low image quality. |
| NORMAL_MODE | Transform will be used for normal image display. Average image quality. |
| BEST_MODE | Transform will be used for the display of the highest-quality image possible on the target device. |
Moving from PROOF_MODE to BEST_MODE, output quality generally improves and transform speed declines.
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