src/gif2swf.c

   1 /* -*- mode: c; tab-width: 4; -*- ---------------------------[for (x)emacs]--
   2
   3    $Id: gif2swf.c,v 1.7 2008/02/08 11:43:12 kramm Exp $
   4    GIF to SWF converter tool
   5
   6    Part of the swftools package.
   7
   8    Copyright (c) 2005 Daichi Shinozaki <dseg@shield.jp>
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
  23
  24    This file is derived from png2swf.c */
  25
  26 #include <stdio.h>
  27 #include <fcntl.h>
  28 #include <gif_lib.h>
  29 #include "../lib/rfxswf.h"
  30 #include "../lib/args.h"
  31
  32 #define MAX_INPUT_FILES 1024
  33 #define VERBOSE(x) (global.verbose>=x)
  34 #define AS_FIRSTFRAME "if(!n) n=0;"
  35 #define AS_LASTFRAME "if(n<%d){n=n+1;gotoAndPlay(1);}else stop();"
  36
  37 static struct {
  38     float framerate;
  39     int max_image_width;
  40     int max_image_height;
  41     int force_width;
  42     int force_height;
  43     int nfiles;
  44     int verbose;
  45     int do_cgi;
  46     int version;
  47     char *outfile;
  48     int imagecount;
  49     int loopcount;
  50 } global;
  51
  52 struct {
  53     char *filename;
  54 } image[MAX_INPUT_FILES];
  55
  56 struct gif_header {
  57     int width;
  58     int height;
  59 };
  60
  61 enum disposal_method {
  62     NONE,
  63     DO_NOT_DISPOSE,
  64     RESTORE_TO_BGCOLOR,
  65     RESTORE_TO_PREVIOUS
  66 };
  67
  68
  69 void SetFrameAction(TAG ** t, const char *src, int ver)
  70 {
  71     ActionTAG *as;
  72
  73     as = swf_ActionCompile(src, ver);
  74     if (!as)
  75         fprintf(stderr, "Couldn't compile ActionScript\n");
  76     else {
  77         *t = swf_InsertTag(*t, ST_DOACTION);
  78         swf_ActionSet(*t, as);
  79         swf_ActionFree(as);
  80     }
  81 }
  82
  83 int getGifDisposalMethod(GifFileType * gft, int framenum)
  84 {
  85     int i;
  86     ExtensionBlock *ext = gft->SavedImages[framenum].ExtensionBlocks;
  87
  88     for (i = 0; i < gft->SavedImages[framenum].ExtensionBlockCount; i++, ext++)
  89         if (ext->Function == GRAPHICS_EXT_FUNC_CODE)
  90             return ((ext->Bytes[0] & 0x1C) >> 2);
  91
  92     return -1;
  93 }
  94
  95 int getGifLoopCount(GifFileType * gft)
  96 {
  97     int i, loop = -1;
  98     ExtensionBlock *ext = gft->SavedImages[0].ExtensionBlocks;
  99
 100     for (i = 0; i < gft->SavedImages[0].ExtensionBlockCount; i++, ext++)
 101         if (ext->Function == APPLICATION_EXT_FUNC_CODE) {
 102             // info: http://semmix.pl/color/exgraf/eeg24.htm
 103             if (ext->ByteCount == 11 &&
 104                 (strncmp(&ext->Bytes[0], "NETSCAPE2.0", 11) == 0 ||
 105                  strncmp(&ext->Bytes[0], "ANIMEXTS1.0", 11) == 0)) {
 106                 // check for the subblock
 107                 ext++;
 108                 if (ext->ByteCount != 3)
 109                     ext--;
 110                 else {
 111                     loop = GET16(&ext->Bytes[1]);
 112                     break;
 113                 }
 114             }
 115         }
 116
 117     return loop;
 118 }
 119
 120 U16 getGifDelayTime(GifFileType * gft, int framenum)
 121 {
 122     int i;
 123     ExtensionBlock *ext = gft->SavedImages[framenum].ExtensionBlocks;
 124
 125     for (i = 0; i < gft->SavedImages[framenum].ExtensionBlockCount; i++, ext++)
 126         if (ext->Function == GRAPHICS_EXT_FUNC_CODE)
 127             return GET16(&ext->Bytes[1]);
 128
 129     return 0;
 130 }
 131
 132 int getTransparentColor(GifFileType * gft, int framenum)
 133 {
 134     int i;
 135     ExtensionBlock *ext = gft->SavedImages[framenum].ExtensionBlocks;
 136
 137     // Get transparency color from graphic extension block
 138     for (i = 0; i < gft->SavedImages[framenum].ExtensionBlockCount; i++, ext++)
 139         if ((ext->Function == GRAPHICS_EXT_FUNC_CODE) && (ext->Bytes[0] & 1)) {
 140             // there is a transparent color
 141             return ext->Bytes[3] == 0 ? 0 :     // exception
 142                 (U8) ext->Bytes[3];             // transparency color
 143         }
 144
 145     return -1;
 146 }
 147
 148 TAG *MovieStart(SWF * swf, float framerate, int dx, int dy)
 149 {
 150     TAG *t;
 151     RGBA rgb;
 152
 153     memset(swf, 0x00, sizeof(SWF));
 154
 155     swf->fileVersion = global.version;
 156     swf->frameRate = (int) (256.0 * framerate);
 157     swf->movieSize.xmax = dx * 20;
 158     swf->movieSize.ymax = dy * 20;
 159
 160     t = swf->firstTag = swf_InsertTag(NULL, ST_SETBACKGROUNDCOLOR);
 161
 162     rgb.r = rgb.g = rgb.b = rgb.a = 0x00;
 163
 164     //rgb.g = 0xff; //<--- handy for testing alpha conversion
 165     swf_SetRGB(t, &rgb);
 166
 167     return t;
 168 }
 169
 170 int MovieFinish(SWF * swf, TAG * t, char *sname)
 171 {
 172     int f, so = fileno(stdout);
 173     t = swf_InsertTag(t, ST_END);
 174
 175     if ((!isatty(so)) && (!sname))
 176         f = so;
 177     else {
 178         if (!sname)
 179             sname = "output.swf";
 180         f = open(sname, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644);
 181     }
 182
 183     if (global.do_cgi) {
 184         if FAILED
 185             (swf_WriteCGI(swf)) fprintf(stderr, "WriteCGI() failed.\n");
 186     } else {
 187         if (swf_WriteSWF(f, swf) < 0)
 188             fprintf(stderr, "Unable to write output file: %s\n", sname);
 189         if (f != so)
 190             close(f);
 191     }
 192
 193     swf_FreeTags(swf);
 194     return 0;
 195 }
 196
 197 TAG *MovieAddFrame(SWF * swf, TAG * t, char *sname, int id, int imgidx)
 198 {
 199     SHAPE *s;
 200     SRECT r;
 201     MATRIX m;
 202     int fs;
 203
 204     U8 *imagedata, *from, *to;
 205     GifImageDesc *img;
 206     RGBA *pal;
 207
 208     struct gif_header header;
 209
 210     int i, j, numcolors, alphapalette;
 211     U8 bgcolor;
 212     int bpp;                    // byte per pixel
 213     int swf_width, padlen;
 214
 215     ColorMapObject *colormap;
 216     GifColorType c;
 217     int interlacedOffset[] = { 0, 4, 2, 1 };    // The way Interlaced image should
 218     int interlacedJumps[] = { 8, 8, 4, 2 };     // be read - offsets and jumps...
 219     U16 delay, depth;
 220     int disposal;
 221     char *as_lastframe;
 222
 223     GifFileType *gft;
 224     FILE *fi;
 225     int ret;
 226
 227     if ((fi = fopen(sname, "rb")) == NULL) {
 228         if (VERBOSE(1))
 229             fprintf(stderr, "Read access failed: %s\n", sname);
 230         return t;
 231     }
 232     fclose(fi);
 233
 234 #if defined(GIFLIB_MAJOR) && GIFLIB_MAJOR >= 5
 235     gft = DGifOpenFileName(sname, NULL);
 236 #else
 237     gft = DGifOpenFileName(sname);
 238 #endif
 239     if (gft == NULL) {
 240         fprintf(stderr, "%s is not a GIF file!\n", sname);
 241         return t;
 242     }
 243
 244     if ((ret = DGifSlurp(gft)) != GIF_OK) {
 245 #if defined(GIFLIB_MAJOR) && GIFLIB_MAJOR >= 5
 246         fprintf(stderr, "GIF-LIB: %s\n", GifErrorString(ret));
 247 #else
 248         PrintGifError();
 249 #endif
 250         return t;
 251     }
 252
 253     header.width = gft->SWidth;
 254     header.height = gft->SHeight;
 255
 256     pal = (RGBA *) malloc(256 * sizeof(RGBA));
 257     memset(pal, 0, 256 * sizeof(RGBA));
 258
 259     img = &gft->SavedImages[imgidx].ImageDesc;
 260     if(!img) {
 261         exit(1);
 262     }
 263
 264     // Local colormap has precedence over Global colormap
 265     colormap = img->ColorMap ? img->ColorMap : gft->SColorMap;
 266     numcolors = colormap->ColorCount;
 267     alphapalette = getTransparentColor(gft, imgidx);
 268     if (VERBOSE(3))
 269         fprintf(stderr, "transparent palette index => %d\n", alphapalette);
 270     bpp = (alphapalette >= 0 ? 4 : 3);
 271
 272     // bgcolor is the background color to fill the bitmap
 273     if (gft->SColorMap)         // There is a GlobalColorMap
 274         bgcolor = (U8) gft->SBackGroundColor;   // The SBGColor is meaningful
 275     else if (alphapalette >= 0) // There is a transparency color
 276         bgcolor = alphapalette; // set the bgcolor to tranparent
 277     else
 278         bgcolor = 0;
 279     // Don't know what to do here.
 280     // If this doesn't work, we could
 281     // create a new color and set the
 282     // alpha-channel to transparent
 283     // (unless we are using all the 256
 284     // colors, in which case either we
 285     // give up, or move to 16-bits palette
 286     if (VERBOSE(3))
 287         fprintf(stderr, "BG palette index => %u\n", bgcolor);
 288
 289     for (i = 0; i < numcolors; i++) {
 290         c = colormap->Colors[i];
 291         if (i == bgcolor || i == alphapalette)
 292             pal[i].r = pal[i].g = pal[i].b = pal[i].a = 0;      // Fully transparent
 293         else {
 294             pal[i].r = c.Red;
 295             pal[i].g = c.Green;
 296             pal[i].b = c.Blue;
 297             pal[i].a = 255;     // Fully opaque
 298         }
 299     }
 300
 301     t = swf_InsertTag(t, bpp == 4 ? ST_DEFINEBITSLOSSLESS2 : ST_DEFINEBITSLOSSLESS);
 302     swf_SetU16(t, id);          // id
 303
 304     // Ah! The Flash specs says scanlines must be DWORD ALIGNED!
 305     // (but image width is the correct number of pixels)
 306     swf_width = BYTES_PER_SCANLINE(header.width);
 307
 308     if ((imagedata = (U8 *) malloc(swf_width * header.height)) == NULL) {
 309         fprintf(stderr, "Failed to allocate memory required, aborted.");
 310         exit(2);
 311     }
 312
 313     to = imagedata;
 314     from = (U8 *) gft->SavedImages[imgidx].RasterBits;
 315
 316     if (swf_width == header.width) {
 317         // we are all nicely aligned and don't need to move the bitmap around.
 318         // Just copy the bits into the image buffer.
 319         if (!gft->Image.Interlace)
 320             if (header.width == img->Width && header.height == img->Height)
 321                 memcpy(to, from, header.width * header.height);
 322             else {              //small screen
 323                 for (i = 0; i < header.height; i++, to += header.width) {
 324                     memset(to, bgcolor, header.width);
 325                     if (i >= img->Top && i < img->Top + img->Height) {
 326                         memcpy(to + img->Left, from, img->Width);
 327                         from += img->Width;
 328                     }
 329                 }
 330             }
 331
 332         else                    // Need to perform 4 passes on the interlaced images
 333             for (i = 0; i < 4; i++)
 334                 for (j = interlacedOffset[i]; j < header.height;
 335                      j += interlacedJumps[i], from += header.width)
 336                     memcpy(to + header.width * j, from, header.width);
 337     } else {
 338         padlen = swf_width - header.width;
 339
 340         // here we need to pad the scanline
 341         if (!gft->Image.Interlace) {
 342             if (header.width == img->Width && header.height == img->Height) {
 343                 for (i = 0; i < header.height; i++, from += header.width, to += swf_width) {
 344                     memcpy(to, from, header.width);
 345                     memset(to + header.width, bgcolor, padlen);
 346                 }
 347             } else {            //small screen
 348                 for (i = 0; i < header.height; i++, to += swf_width) {
 349                     memset(to, bgcolor, swf_width);
 350                     if (i >= img->Top && i < img->Top + img->Height) {
 351                         memcpy(to + img->Left, from, img->Width);
 352                         from += img->Width;
 353                     }
 354                 }
 355             }
 356         } else {                // Need to perform 4 passes on the interlaced images
 357             for (i = 0; i < 4; i++)
 358                 for (j = interlacedOffset[i]; j < header.height;
 359                      j += interlacedJumps[i], from += header.width) {
 360                     memcpy(to + swf_width * j, from, header.width);
 361                     memset(to + swf_width * j, bgcolor, padlen);
 362                 }
 363         }
 364     }
 365     swf_SetLosslessBitsIndexed(t, header.width, header.height, imagedata, pal, 256);
 366
 367     t = swf_InsertTag(t, ST_DEFINESHAPE);
 368
 369     swf_ShapeNew(&s);
 370     swf_GetMatrix(NULL, &m);
 371     m.sx = 20 * 0x10000;
 372     m.sy = 20 * 0x10000;
 373     fs = swf_ShapeAddBitmapFillStyle(s, &m, id, 0);
 374
 375     swf_SetU16(t, id + 1);      // id
 376
 377     r.xmin = r.ymin = 0;
 378     r.xmax = header.width * 20;
 379     r.ymax = header.height * 20;
 380     swf_SetRect(t, &r);
 381
 382     swf_SetShapeHeader(t, s);
 383
 384     swf_ShapeSetAll(t, s, 0, 0, 0, fs, 0);
 385     swf_ShapeSetLine(t, s, r.xmax, 0);
 386     swf_ShapeSetLine(t, s, 0, r.ymax);
 387     swf_ShapeSetLine(t, s, -r.xmax, 0);
 388     swf_ShapeSetLine(t, s, 0, -r.ymax);
 389
 390     swf_ShapeSetEnd(t);
 391
 392     depth = imgidx + 1;
 393     if ((imgidx > 0) &&         // REMOVEOBJECT2 not needed at frame 1(imgidx==0)
 394         (global.imagecount > 1)) {
 395         // check last frame's disposal method
 396         if ((disposal = getGifDisposalMethod(gft, imgidx - 1)) >= 0) {
 397             switch (disposal) {
 398             case NONE:
 399                 // [Replace one full-size, non-transparent frame with another]
 400                 t = swf_InsertTag(t, ST_REMOVEOBJECT2);
 401                 swf_SetU16(t, depth - 1);
 402                 if (VERBOSE(3))
 403                     fprintf(stdout, "  [none]\n");
 404                 break;
 405             case DO_NOT_DISPOSE:
 406                 // [Any pixels not covered up by the next frame continue to display]
 407                 if (VERBOSE(3))
 408                     fprintf(stdout, "  [don't dispose]\n");
 409                 break;
 410             case RESTORE_TO_BGCOLOR:
 411                 // [The background color or background tile -rather than a previous frame-
 412                 //  shows through transparent pixels]
 413                 t = swf_InsertTag(t, ST_REMOVEOBJECT2);
 414                 swf_SetU16(t, depth - 2);
 415                 if (VERBOSE(3))
 416                     fprintf(stdout, "  [restore to bg color]\n");
 417                 break;
 418             case RESTORE_TO_PREVIOUS:
 419                 // [Restores to the state of a previous, undisposed frame]
 420                 // ** NOT IMPLEMENTED YET (same as "restore to bgcolor") **
 421                 t = swf_InsertTag(t, ST_REMOVEOBJECT2);
 422                 swf_SetU16(t, depth - 1);
 423                 if (VERBOSE(3))
 424                     fprintf(stdout, "  [restore to previous]\n");
 425                 break;
 426             default:
 427                 break;
 428             }
 429         }
 430     }
 431
 432     swf_SetU16(t, depth);
 433     t = swf_InsertTag(t, ST_PLACEOBJECT2);
 434
 435     swf_GetMatrix(NULL, &m);
 436     m.tx = (swf->movieSize.xmax - (int) header.width * 20) / 2;
 437     m.ty = (swf->movieSize.ymax - (int) header.height * 20) / 2;
 438     swf_ObjectPlace(t, id + 1, depth, &m, NULL, NULL);
 439
 440     if ((global.imagecount > 1) && (global.loopcount > 0)) { // 0 means infinite loop
 441         if (imgidx == 0)
 442             SetFrameAction(&t, AS_FIRSTFRAME, global.version);
 443     }
 444
 445     t = swf_InsertTag(t, ST_SHOWFRAME);
 446
 447     if (global.imagecount > 1) { // multi-frame GIF?
 448         int framecnt;
 449         delay = getGifDelayTime(gft, imgidx); // delay in 1/100 sec
 450         framecnt = (int) (global.framerate * (delay / 100.0));
 451         if (framecnt > 1) {
 452             if (VERBOSE(2))
 453                 fprintf(stderr, "at frame %d: pad %d frames(%.3f sec)\n",
 454                         imgidx + 1, framecnt, delay / 100.0);
 455
 456             framecnt -= 1; // already inserted a frame
 457             while (framecnt--)
 458                 t = swf_InsertTag(t, ST_SHOWFRAME);
 459         }
 460         if ((imgidx == global.imagecount - 1) &&global.loopcount > 0) { // last frame
 461             as_lastframe = malloc(strlen(AS_LASTFRAME) + 5); // 0-99999
 462             sprintf(as_lastframe, AS_LASTFRAME, global.loopcount);
 463             SetFrameAction(&t, as_lastframe, global.version);
 464             if (as_lastframe)
 465                 free(as_lastframe);
 466         }
 467     }
 468
 469     free(pal);
 470     free(imagedata);
 471     DGifCloseFile(gft);
 472
 473     return t;
 474 }
 475
 476 int CheckInputFile(char *fname, char **realname)
 477 {
 478     FILE *fi;
 479     char *s = malloc(strlen(fname) + 5);
 480     GifFileType *gft;
 481     int ret;
 482
 483     if (!s)
 484         exit(2);
 485     (*realname) = s;
 486     strcpy(s, fname);
 487
 488     // Check whether file exists (with typical extensions)
 489
 490     if ((fi = fopen(s, "rb")) == NULL) {
 491         sprintf(s, "%s.gif", fname);
 492         if ((fi = fopen(s, "rb")) == NULL) {
 493             sprintf(s, "%s.GIF", fname);
 494             if ((fi = fopen(s, "rb")) == NULL) {
 495                 sprintf(s, "%s.Gif", fname);
 496                 if ((fi = fopen(s, "rb")) == NULL) {
 497                     fprintf(stderr, "Couldn't open %s!\n", fname);
 498                     return -1;
 499                 }
 500             }
 501         }
 502     }
 503     fclose(fi);
 504
 505 #if defined(GIFLIB_MAJOR) && GIFLIB_MAJOR >= 5
 506     gft = DGifOpenFileName(s, NULL);
 507 #else
 508     gft = DGifOpenFileName(s);
 509 #endif
 510     if (gft == NULL) {
 511         fprintf(stderr, "%s is not a GIF file!\n", fname);
 512         return -1;
 513     }
 514
 515     if (global.max_image_width < gft->SWidth)
 516         global.max_image_width = gft->SWidth;
 517     if (global.max_image_height < gft->SHeight)
 518         global.max_image_height = gft->SHeight;
 519
 520     if ((ret = DGifSlurp(gft)) != GIF_OK) {
 521 #if defined(GIFLIB_MAJOR) && GIFLIB_MAJOR >= 5
 522         fprintf(stderr, "GIF-LIB: %s\n", GifErrorString(ret));
 523 #else
 524         PrintGifError();
 525 #endif
 526         return -1;
 527     }
 528     // After DGifSlurp() call, gft->ImageCount become available
 529     if ((global.imagecount = gft->ImageCount) >1) {
 530         if (global.loopcount < 0) {
 531             global.loopcount = getGifLoopCount(gft);
 532             if (VERBOSE(3))
 533                 fprintf(stderr, "Loops => %d\n", global.loopcount);
 534         }
 535     }
 536     if (VERBOSE(2)) {
 537         U8 i;
 538         fprintf(stderr, "%d x %d, %d images total\n", gft->SWidth, gft->SHeight, gft->ImageCount);
 539
 540         for (i = 0; i < gft->ImageCount; i++)
 541             fprintf(stderr, "frame: %u, delay: %.3f sec\n", i + 1, getGifDelayTime(gft, i) / 100.0);
 542     }
 543
 544     DGifCloseFile(gft);
 545
 546     return 0;
 547 }
 548
 549 int args_callback_option(char *arg, char *val)
 550 {
 551     int res = 0;
 552     if (arg[1])
 553         res = -1;
 554     else
 555         switch (arg[0]) {
 556         case 'l':
 557             if (val)
 558                 global.loopcount = atoi(val);
 559             res = 1;
 560             break;
 561
 562         case 'r':
 563             if (val)
 564                 global.framerate = atof(val);
 565             if ((global.framerate < 1.0 / 256) ||(global.framerate >= 256.0)) {
 566                 if (VERBOSE(1))
 567                     fprintf(stderr,
 568                             "Error: You must specify a valid framerate between 1/256 and 255.\n");
 569                 exit(1);
 570             }
 571             res = 1;
 572             break;
 573
 574         case 'o':
 575             if (val)
 576                 global.outfile = val;
 577             res = 1;
 578             break;
 579
 580         case 'z':
 581             global.version = 6;
 582             res = 0;
 583             break;
 584
 585         case 'C':
 586             global.do_cgi = 1;
 587             break;
 588
 589         case 'v':
 590             if (val)
 591                 global.verbose = atoi(val);
 592             res = 1;
 593             break;
 594
 595         case 'X':
 596             if (val)
 597                 global.force_width = atoi(val);
 598             res = 1;
 599             break;
 600
 601         case 'Y':
 602             if (val)
 603                 global.force_height = atoi(val);
 604             res = 1;
 605             break;
 606
 607         case 'V':
 608             printf("gif2swf - part of %s %s\n", PACKAGE, VERSION);
 609             exit(0);
 610
 611         default:
 612             res = -1;
 613             break;
 614         }
 615
 616     if (res < 0) {
 617         if (VERBOSE(1))
 618             fprintf(stderr, "Unknown option: -%s\n", arg);
 619         exit(1);
 620         return 0;
 621     }
 622     return res;
 623 }
 624
 625 static struct options_t options[] = {
 626 {"r", "rate"},
 627 {"o", "output"},
 628 {"z", "zlib"},
 629 {"l", "loop"},
 630 {"X", "pixel"},
 631 {"Y", "pixel"},
 632 {"v", "verbose"},
 633 {"C", "cgi"},
 634 {"V", "version"},
 635 {0,0}
 636 };
 637
 638 int args_callback_longoption(char *name, char *val)
 639 {
 640     return args_long2shortoption(options, name, val);
 641 }
 642
 643 int args_callback_command(char *arg, char *next) // actually used as filename
 644 {
 645     char *s;
 646     if (CheckInputFile(arg, &s) < 0) {
 647         if (VERBOSE(1))
 648             fprintf(stderr, "Error opening input file: %s\n", arg);
 649         free(s);
 650
 651     } else {
 652         image[global.nfiles].filename = s;
 653         global.nfiles++;
 654         if (global.nfiles >= MAX_INPUT_FILES) {
 655             if (VERBOSE(1))
 656                 fprintf(stderr, "Error: Too many input files.\n");
 657             exit(1);
 658         }
 659     }
 660
 661     return 0;
 662 }
 663
 664 void args_callback_usage(char *name)
 665 {
 666     printf("\n");
 667     printf("Usage: %s [-X width] [-Y height] [-o file.swf] [-r rate] file1.gif [file2.gif ...]\n", name);
 668     printf("\n");
 669     printf("-r , --rate <framerate>        Set movie framerate (frames per second)\n");
 670     printf("-o , --output <filename>       Set name for SWF output file.\n");
 671     printf("-z , --zlib <zlib>             Enable Flash 6 (MX) Zlib Compression\n");
 672     printf("-l , --loop <loop count>           Set loop count. (default: 0 [=infinite loop])\n");
 673     printf("-X , --pixel <width>           Force movie width to <width> (default: autodetect)\n");
 674     printf("-Y , --pixel <height>          Force movie height to <height> (default: autodetect)\n");
 675     printf("-v , --verbose <level>         Set verbose level (0=quiet, 1=default, 2=debug)\n");
 676     printf("-C , --cgi                     For use as CGI- prepend http header, write to stdout\n");
 677     printf("-V , --version                 Print version information and exit\n");
 678     printf("\n");
 679 }
 680
 681 int main(int argc, char **argv)
 682 {
 683     SWF swf;
 684     TAG *t;
 685
 686     memset(&global, 0x00, sizeof(global));
 687
 688     global.framerate = 1.0;
 689     global.verbose = 1;
 690     global.version = 5;
 691     global.loopcount = -1;
 692
 693     processargs(argc, argv);
 694
 695     if (global.nfiles <= 0) {
 696         fprintf(stderr, "No gif files found in arguments\n");
 697         return 1;
 698     }
 699
 700     if (VERBOSE(2))
 701         fprintf(stderr, "Processing %i file(s)...\n", global.nfiles);
 702
 703     if (global.imagecount > 1)       // multi-frame GIF?
 704         if (global.framerate == 1.0) // user not specified '-r' option?
 705             global.framerate = 10.0;
 706
 707     t = MovieStart(&swf, global.framerate,
 708                    global.force_width ? global.force_width : global.max_image_width,
 709                    global.force_height ? global.force_height : global.max_image_height);
 710     {
 711         int i, j;
 712         for (i = 0; i < global.nfiles; i++) {
 713             if (VERBOSE(3))
 714                 fprintf(stderr, "[%03i] %s\n", i, image[i].filename);
 715             t = MovieAddFrame(&swf, t, image[i].filename, (i * 2) + 1, 0);
 716             for (j = 2; j <= global.imagecount; j++)
 717                 t = MovieAddFrame(&swf, t, image[i].filename, (j * 2) - 1, j - 1);
 718             free(image[i].filename);
 719         }
 720     }
 721
 722     MovieFinish(&swf, t, global.outfile);
 723
 724     return 0;
 725 }