static void art_rgba_fill_run (art_u8 * linebuf, art_u8 r, art_u8 g, art_u8 b, int n);
static void art_rgba_run_alpha (art_u8 * linebuf, art_u8 r, art_u8 g, art_u8 b, int alpha, int n);
static void art_rgba_fill_run (art_u8 * linebuf, art_u8 r, art_u8 g, art_u8 b, int n);
static void art_rgba_run_alpha (art_u8 * linebuf, art_u8 r, art_u8 g, art_u8 b, int alpha, int n);