| rsc | 2899450 | 2004-04-21 22:19:33 +0000 | [diff] [blame] | 1 | #include <u.h> |
| 2 | #include <libc.h> |
| 3 | #include <draw.h> |
| 4 | #include <memdraw.h> |
| 5 | #include <ctype.h> |
| 6 | #include <bio.h> |
| 7 | #include "imagefile.h" |
| 8 | |
| 9 | void |
| 10 | usage(void) |
| 11 | { |
| 12 | fprint(2, "usage: togif [-l loopcount] [-c 'comment'] [-d Δt (ms)] [-t transparency-index] [file ... [-d Δt] file ...]\n"); |
| 13 | exits("usage"); |
| 14 | } |
| 15 | |
| 16 | #define UNSET (-12345678) |
| 17 | |
| 18 | void |
| 19 | main(int argc, char *argv[]) |
| 20 | { |
| 21 | Biobuf bout; |
| 22 | Memimage *i, *ni; |
| 23 | int fd, j, dt, trans, loop; |
| 24 | char buf[256]; |
| 25 | char *err, *comment, *s; |
| 26 | |
| 27 | comment = nil; |
| 28 | dt = -1; |
| 29 | trans = -1; |
| 30 | loop = UNSET; |
| 31 | ARGBEGIN{ |
| 32 | case 'l': |
| 33 | s = ARGF(); |
| 34 | if(s==nil || (!isdigit(s[0]) && s[0]!='-')) |
| 35 | usage(); |
| 36 | loop = atoi(s); |
| 37 | break; |
| 38 | case 'c': |
| 39 | comment = ARGF(); |
| 40 | if(comment == nil) |
| 41 | usage(); |
| 42 | break; |
| 43 | case 'd': |
| 44 | s = ARGF(); |
| 45 | if(s==nil || !isdigit(s[0])) |
| 46 | usage(); |
| 47 | dt = atoi(s); |
| 48 | break; |
| 49 | case 't': |
| 50 | s = ARGF(); |
| 51 | if(s==nil || !isdigit(s[0])) |
| 52 | usage(); |
| 53 | trans = atoi(s); |
| 54 | if(trans > 255) |
| 55 | usage(); |
| 56 | break; |
| 57 | default: |
| 58 | usage(); |
| 59 | }ARGEND |
| 60 | |
| 61 | if(Binit(&bout, 1, OWRITE) < 0) |
| 62 | sysfatal("Binit failed: %r"); |
| 63 | |
| 64 | memimageinit(); |
| 65 | |
| 66 | err = nil; |
| 67 | |
| 68 | if(argc == 0){ |
| 69 | i = readmemimage(0); |
| 70 | if(i == nil) |
| 71 | sysfatal("reading input: %r"); |
| 72 | ni = memonechan(i); |
| 73 | if(ni == nil) |
| 74 | sysfatal("converting image to RGBV: %r"); |
| 75 | if(i != ni){ |
| 76 | freememimage(i); |
| 77 | i = ni; |
| 78 | } |
| 79 | err = memstartgif(&bout, i, -1); |
| 80 | if(err == nil){ |
| 81 | if(comment) |
| 82 | err = memwritegif(&bout, i, comment, dt, trans); |
| 83 | else{ |
| 84 | snprint(buf, sizeof buf, "Converted by Plan 9 from <stdin>"); |
| 85 | err = memwritegif(&bout, i, buf, dt, trans); |
| 86 | } |
| 87 | } |
| 88 | }else{ |
| 89 | if(loop == UNSET){ |
| 90 | if(argc == 1) |
| 91 | loop = -1; /* no loop for single image */ |
| 92 | else |
| 93 | loop = 0; /* the default case: 0 means infinite loop */ |
| 94 | } |
| 95 | for(j=0; j<argc; j++){ |
| 96 | if(argv[j][0] == '-' && argv[j][1]=='d'){ |
| 97 | /* time change */ |
| 98 | if(argv[j][2] == '\0'){ |
| 99 | s = argv[++j]; |
| 100 | if(j == argc) |
| 101 | usage(); |
| 102 | }else |
| 103 | s = &argv[j][2]; |
| 104 | if(!isdigit(s[0])) |
| 105 | usage(); |
| 106 | dt = atoi(s); |
| 107 | if(j == argc-1) /* last argument must be file */ |
| 108 | usage(); |
| 109 | continue; |
| 110 | } |
| 111 | fd = open(argv[j], OREAD); |
| 112 | if(fd < 0) |
| 113 | sysfatal("can't open %s: %r", argv[j]); |
| 114 | i = readmemimage(fd); |
| 115 | if(i == nil) |
| 116 | sysfatal("can't readimage %s: %r", argv[j]); |
| 117 | close(fd); |
| 118 | ni = memonechan(i); |
| 119 | if(ni == nil) |
| 120 | sysfatal("converting image to RGBV: %r"); |
| 121 | if(i != ni){ |
| 122 | freememimage(i); |
| 123 | i = ni; |
| 124 | } |
| 125 | if(j == 0){ |
| 126 | err = memstartgif(&bout, i, loop); |
| 127 | if(err != nil) |
| 128 | break; |
| 129 | } |
| 130 | if(comment) |
| 131 | err = memwritegif(&bout, i, comment, dt, trans); |
| 132 | else{ |
| 133 | snprint(buf, sizeof buf, "Converted by Plan 9 from %s", argv[j]); |
| 134 | err = memwritegif(&bout, i, buf, dt, trans); |
| 135 | } |
| 136 | if(err != nil) |
| 137 | break; |
| 138 | freememimage(i); |
| 139 | comment = nil; |
| 140 | } |
| 141 | } |
| 142 | memendgif(&bout); |
| 143 | |
| 144 | if(err != nil) |
| 145 | fprint(2, "togif: %s\n", err); |
| 146 | exits(err); |
| 147 | } |
