If the image to be loaded is 12, 16 or 32-bit grayscale and 0 is passed for the parameter that controls the number of bits per pixel at which to load the image, then if L_SUPPORT_DOCUMENT support is locked, the image will be loaded as 8-bit grayscale, instead of the original bits per pixel.
For more information on the L_SUPPORT_DOCUMENT support, refer to L_IsSupportLocked.
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