This function changes the bit depths of the image channels to the specified depths.
Declaration:
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AT_ERRCOUNT ACCUAPI IG_image_channel_depths_change(
HIGEAR hIGear,
const AT_INT* newDepths,
AT_MODE scaleMode
);
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Arguments:
| hIGear | HIGEAR handle of image. |
| newDepths | New channel depths to set. |
| scaleMode | Mode to use for scaling channel depths - must be one of the following: IG_DEPTH_CHANGE_SCALE or IG_DEPTH_CHANGE_NO_SCALE. |
Return Value:
Returns the number of ImageGear errors that occurred during this function call. If there are no errors, the return value is IGE_SUCCESS.
Supported Raster Image Formats:
All pixel formats supported by ImageGear Professional.
Sample:
None
Example:
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/* Alter a 24-bit RGB image to have full 8-bit precision for green, but only 1-bit precision for red and blue */ AT_ERRCOUNT nErrcount; /* Number of errors on stack */ HIGEAR hImage; /* HIGEAR handle of image */ AT_INT depths[] = { 1, 8, 1 }; /* New channel depths */ nErrcount = IG_load_file("test.jpg", &hImage); nErrcount = IG_image_channel_depths_change(hImage, depths, IG_DEPTH_CHANGE_SCALE); nErrcount = IG_save_file(hImage, "test.bmp", IG_SAVE_BMP_UNCOMP); nErrcount = IG_image_delete(hImage); |
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Remarks:
If scaling is used, pixel data is scaled to match the new bit depths. Otherwise, pixel data will remain unchanged and will be interpreted as conforming to the new depths.