PNG_ALPHA_OPTIMIZED 8042 contrib/libtests/pngvalid.c case ALPHA_MODE_OFFSET + PNG_ALPHA_OPTIMIZED: PNG_ALPHA_OPTIMIZED 8193 contrib/libtests/pngvalid.c if (do_background == ALPHA_MODE_OFFSET + PNG_ALPHA_OPTIMIZED && PNG_ALPHA_OPTIMIZED 8489 contrib/libtests/pngvalid.c case ALPHA_MODE_OFFSET + PNG_ALPHA_OPTIMIZED: PNG_ALPHA_OPTIMIZED 9262 contrib/libtests/pngvalid.c case ALPHA_MODE_OFFSET + PNG_ALPHA_OPTIMIZED: PNG_ALPHA_OPTIMIZED 3795 pngread.c mode = PNG_ALPHA_OPTIMIZED; PNG_ALPHA_OPTIMIZED 333 pngrtran.c case PNG_ALPHA_OPTIMIZED: /* associated, non-opaque pixels linear */