Lines Matching full:grayscale
541 /* Expand paletted images to RGB, expand grayscale images of
560 * convert tRNS to the grayscale/RGB format (16-bit RGB value), or replace
586 /* Expand grayscale images of less than 8-bit depth to 8 bits. */
600 /* Expand grayscale images of less than 8-bit depth to 8 bits. */
638 /* Convert a RGB image to a grayscale of the same width. This allows us,
639 * for example, to convert a 24 bpp RGB image into an 8 bpp grayscale image.
2120 /* expand grayscale files to RGB, with or without alpha */
2203 /* reduce RGB files to grayscale, with or without alpha
2456 /* Build a grayscale palette. Palette is assumed to be 1 << bit_depth
2457 * large of png_color. This lets grayscale images be treated as
2668 else /* assume grayscale palette (what else could it be?) */
3376 * you do this after you deal with the transparency issue on grayscale
