blind-single-colour.c (2028B)
1 /* See LICENSE file for copyright and license details. */ 2 #ifndef TYPE 3 #include "common.h" 4 5 USAGE("[-f frames | -f 'inf'] [-F pixel-format] -w width -h height (X Y Z | Y) [alpha]") 6 7 static struct stream stream = { .width = 0, .height = 0, .frames = 1 }; 8 static double X, Y, Z, alpha = 1; 9 static int inf = 0; 10 11 #define FILE "blind-single-colour.c" 12 #include "define-functions.h" 13 14 int 15 main(int argc, char *argv[]) 16 { 17 char *arg; 18 const char *pixfmt = "xyza"; 19 void (*process)(void); 20 21 ARGBEGIN { 22 case 'f': 23 arg = UARGF(); 24 if (!strcmp(arg, "inf")) 25 inf = 1, stream.frames = 0; 26 else 27 stream.frames = etozu_flag('f', arg, 1, SIZE_MAX); 28 break; 29 case 'F': 30 pixfmt = UARGF(); 31 break; 32 case 'w': 33 stream.width = etozu_flag('w', UARGF(), 1, SIZE_MAX); 34 break; 35 case 'h': 36 stream.height = etozu_flag('h', UARGF(), 1, SIZE_MAX); 37 break; 38 default: 39 usage(); 40 } ARGEND; 41 42 if (!stream.width || !stream.height || !argc || argc > 4) 43 usage(); 44 45 if (argc < 3) { 46 Y = etolf_arg("the Y value", argv[0]); 47 X = Y * D65_XYZ_X; 48 Z = Y * D65_XYZ_Z; 49 } else { 50 X = etolf_arg("the X value", argv[0]); 51 Y = etolf_arg("the Y value", argv[1]); 52 Z = etolf_arg("the Z value", argv[2]); 53 } 54 if (~argc & 1) 55 alpha = etolf_arg("the alpha value", argv[argc - 1]); 56 57 if (inf) 58 einf_check_fd(STDOUT_FILENO, "<stdout>"); 59 60 eset_pixel_format(&stream, pixfmt); 61 SELECT_PROCESS_FUNCTION(&stream); 62 CHECK_N_CHAN(&stream, 4, 4); 63 if (argc < 3) 64 CHECK_COLOUR_SPACE(&stream, CIEXYZ); 65 66 fprint_stream_head(stdout, &stream); 67 efflush(stdout, "<stdout>"); 68 69 process(); 70 return 0; 71 } 72 73 #else 74 75 static void 76 PROCESS(void) 77 { 78 typedef TYPE pixel_t[4]; 79 pixel_t buf[BUFSIZ / 4]; 80 size_t x, y, n, r; 81 for (x = 0; x < ELEMENTSOF(buf); x++) { 82 buf[x][0] = (TYPE)X; 83 buf[x][1] = (TYPE)Y; 84 buf[x][2] = (TYPE)Z; 85 buf[x][3] = (TYPE)alpha; 86 } 87 while (inf || stream.frames--) 88 for (y = stream.height; y--;) 89 for (x = stream.width * sizeof(*buf); x;) 90 for (x -= n = MIN(sizeof(buf), x); n; n -= r) 91 r = ewrite(STDOUT_FILENO, buf, n, "<stdout>"); 92 } 93 94 #endif