Lines Matching full:gray
592 color type (valid values are 1 (GRAY,
647 (PNG_INFO_sBIT) each of the gray,
1036 later check whether the image really was gray, after processing
1038 It will return a png_byte that is zero if the image was gray or
1039 1 if there were any non-gray pixels. bKGD and sBIT data
1049 gray = (rw*red + gw*green + bw*blue)/65536;
1070 a higher bit-depth, you must either supply the background color as a gray
1191 This function can also be used to invert grayscale and gray-alpha images:
1926 (PNG_INFO_sBIT) each of the gray, red,
2247 sig_bit.gray = true_bit_depth;
