Lines Matching full:grayscale
818 /* Expand paletted images to RGB, expand grayscale images of
838 * convert tRNS to the grayscale/RGB format (16-bit RGB value), or replace
865 /* Expand grayscale images of less than 8-bit depth to 8 bits. */
1008 /* Convert a RGB image to a grayscale of the same width. This allows us,
1009 * for example, to convert a 24 bpp RGB image into an 8 bpp grayscale image.
1400 * the file was grayscale the background value is gray.
3086 /* Expand grayscale files to RGB, with or without alpha */
3174 /* Reduce RGB files to grayscale, with or without alpha
3423 /* Build a grayscale palette. Palette is assumed to be 1 << bit_depth
3424 * large of png_color. This lets grayscale images be treated as
4214 * you do this after you deal with the transparency issue on grayscale
