Lines Matching full:grayscale
569 /* Expand paletted images to RGB, expand grayscale images of
589 * convert tRNS to the grayscale/RGB format (16-bit RGB value), or replace
617 /* Expand grayscale images of less than 8-bit depth to 8 bits. */
632 /* Expand grayscale images of less than 8-bit depth to 8 bits. */
671 /* Convert a RGB image to a grayscale of the same width. This allows us,
672 * for example, to convert a 24 bpp RGB image into an 8 bpp grayscale image.
2221 /* Expand grayscale files to RGB, with or without alpha */
2305 /* Reduce RGB files to grayscale, with or without alpha
2563 /* Build a grayscale palette. Palette is assumed to be 1 << bit_depth
2564 * large of png_color. This lets grayscale images be treated as
2783 else /* Assume grayscale palette (what else could it be?) */
3499 * you do this after you deal with the transparency issue on grayscale
