blind-mosaic-edges.c (2755B)
1 /* See LICENSE file for copyright and license details. */ 2 #include "common.h" 3 4 USAGE("[-xy]") 5 6 int 7 main(int argc, char *argv[]) 8 { 9 int tiled_x = 0; 10 int tiled_y = 0; 11 struct stream stream; 12 void *colours[2]; 13 char *buf, *edges, *here; 14 size_t i, n, x, y; 15 int v; 16 17 ARGBEGIN { 18 case 'x': 19 tiled_x = 1; 20 break; 21 case 'y': 22 tiled_y = 1; 23 break; 24 default: 25 usage(); 26 } ARGEND; 27 28 if (argc) 29 usage(); 30 31 eopen_stream(&stream, NULL); 32 echeck_dimensions(&stream, WIDTH | HEIGHT, NULL); 33 34 n = stream.width * stream.height; 35 buf = emalloc(stream.frame_size); 36 edges = emalloc((n + 7) / 8); 37 38 colours[0] = alloca(stream.pixel_size); 39 colours[1] = alloca(stream.pixel_size); 40 memset(colours[0], 0, stream.pixel_size); 41 42 if (stream.encoding == DOUBLE) { 43 ((double *)(colours[1]))[0] = (double)1; 44 ((double *)(colours[1]))[1] = (double)1; 45 ((double *)(colours[1]))[2] = (double)1; 46 ((double *)(colours[1]))[3] = (double)1; 47 } else if (stream.encoding == FLOAT) { 48 ((float *)(colours[1]))[0] = (float)1; 49 ((float *)(colours[1]))[1] = (float)1; 50 ((float *)(colours[1]))[2] = (float)1; 51 ((float *)(colours[1]))[3] = (float)1; 52 } else { 53 eprintf("pixel format %s is not supported, try xyza\n", stream.pixfmt); 54 } 55 56 fprint_stream_head(stdout, &stream); 57 efflush(stdout, "<stdout>"); 58 59 while (eread_frame(&stream, buf)) { 60 memset(edges, 0, (n + 7) / 8); 61 for (i = 0; i < n; i++) { 62 here = buf + i * stream.pixel_size; 63 x = i % stream.width; 64 y = i / stream.width; 65 66 if (x != stream.width - 1) { 67 if (memcmp(here + stream.pixel_size, here, stream.pixel_size)) 68 goto at_edge; 69 } else if (tiled_x) { 70 if (memcmp(here + stream.pixel_size - stream.row_size, here, stream.pixel_size)) 71 goto at_edge; 72 } 73 74 if (x) { 75 if (memcmp(here - stream.pixel_size, here, stream.pixel_size)) 76 goto at_edge; 77 } else if (tiled_x) { 78 if (memcmp(here + stream.row_size - stream.pixel_size, here, stream.pixel_size)) 79 goto at_edge; 80 } 81 82 if (y != stream.height - 1) { 83 if (memcmp(here + stream.row_size, here, stream.pixel_size)) 84 goto at_edge; 85 } else if (tiled_y) { 86 if (memcmp(here + stream.row_size - stream.frame_size, here, stream.pixel_size)) 87 goto at_edge; 88 } 89 90 if (y) { 91 if (memcmp(here - stream.row_size, here, stream.pixel_size)) 92 goto at_edge; 93 } else if (tiled_y) { 94 if (memcmp(here + stream.frame_size - stream.row_size, here, stream.pixel_size)) 95 goto at_edge; 96 } 97 98 continue; 99 at_edge: 100 edges[i >> 3] |= (char)(1 << (i & 7)); 101 } 102 for (i = 0; i < n; i++) { 103 v = (edges[i >> 3] >> (i & 7)) & 1; 104 memcpy(buf + i * stream.pixel_size, colours[v], stream.pixel_size); 105 } 106 ewriteall(STDOUT_FILENO, buf, stream.frame_size, "<stdout>"); 107 } 108 109 free(buf); 110 free(edges); 111 return 0; 112 }