src/png2swf.c

   1 /* png2swf.c
   2
   3    PNG to SWF converter tool
   4
   5    Part of the swftools package.
   6
   7    Copyright (c) 2002,2003 Matthias Kramm <kramm@quiss.org>
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
  22
  23 #include <stdio.h>
  24 #include <math.h>
  25 #include <fcntl.h>
  26 #include <zlib.h>
  27 #include "../lib/rfxswf.h"
  28 #include "../lib/args.h"
  29 #include "../lib/log.h"
  30 #include "../lib/png.h"
  31
  32 #define MAX_INPUT_FILES 1024
  33 #define VERBOSE(x) (global.verbose>=x)
  34
  35 static struct {
  36     float framerate;
  37     int max_image_width;
  38     int max_image_height;
  39     int force_width;
  40     int force_height;
  41     int nfiles;
  42     int verbose;
  43     int do_cgi;
  44     int version;
  45     char *outfile;
  46     int mkjpeg;
  47     float scale;
  48 } global;
  49
  50 static struct {
  51     char *filename;
  52 } image[MAX_INPUT_FILES];
  53
  54 static int custom_move=0;
  55 static int move_x=0;
  56 static int move_y=0;
  57 static int clip_x1=0,clip_y1=0,clip_x2=0,clip_y2=0;
  58 static int custom_clip = 0;
  59
  60 TAG *MovieStart(SWF * swf, float framerate, int dx, int dy)
  61 {
  62     TAG *t;
  63     RGBA rgb;
  64
  65     memset(swf, 0x00, sizeof(SWF));
  66
  67     swf->fileVersion = global.version;
  68     swf->frameRate = (int)(256.0 * framerate);
  69     if(custom_clip) {
  70         swf->movieSize.xmin = clip_x1 * 20;
  71         swf->movieSize.ymin = clip_y1 * 20;
  72         swf->movieSize.xmax = clip_x2 * 20;
  73         swf->movieSize.ymax = clip_y2 * 20;
  74     } else {
  75         swf->movieSize.xmax = dx * 20;
  76         swf->movieSize.ymax = dy * 20;
  77     }
  78
  79     t = swf->firstTag = swf_InsertTag(NULL, ST_SETBACKGROUNDCOLOR);
  80
  81     rgb.r = rgb.g = rgb.b = rgb.a = 0x00;
  82     //rgb.g = 0xff; //<--- handy for testing alpha conversion
  83     swf_SetRGB(t, &rgb);
  84
  85     return t;
  86 }
  87
  88 int MovieFinish(SWF * swf, TAG * t, char *sname)
  89 {
  90     int f, so = fileno(stdout);
  91     t = swf_InsertTag(t, ST_END);
  92
  93     if ((!isatty(so)) && (!sname))
  94         f = so;
  95     else {
  96         if (!sname)
  97             sname = "output.swf";
  98         f = open(sname,O_WRONLY|O_CREAT|O_TRUNC|O_BINARY, 0644);
  99     }
 100
 101     if(global.do_cgi) {
 102         if FAILED(swf_WriteCGI(swf)) fprintf(stderr,"WriteCGI() failed.\n");
 103     } else {
 104         if (swf_WriteSWF(f, swf)<0)
 105             fprintf(stderr, "Unable to write output file: %s\n", sname);
 106         if (f != so)
 107             close(f);
 108     }
 109
 110     swf_FreeTags(swf);
 111     return 0;
 112 }
 113
 114 int png_read_chunk(char (*head)[4], int*destlen, U8**destdata, FILE*fi)
 115 {
 116     unsigned int len;
 117     if(destlen) *destlen=0;
 118     if(destdata) *destdata=0;
 119     if(!fread(&len, 4, 1, fi))
 120         return 0;
 121     if(!fread(head, 4, 1, fi))
 122         return 0;
 123     len = BE_32_TO_NATIVE(len);
 124     if(destlen) *destlen = len;
 125     if(destdata) {
 126         if(len)
 127             *destdata = malloc(len);
 128         else
 129             *destdata = 0;
 130         if(!fread(*destdata, len, 1, fi)) {
 131             *destdata = 0;
 132             if(destlen) *destlen=0;
 133             return 0;
 134         }
 135         fseek(fi, 4, SEEK_CUR);
 136
 137     } else {
 138         fseek(fi, len+4, SEEK_CUR);
 139     }
 140     return 1;
 141 }
 142
 143 unsigned int png_get_dword(FILE*fi)
 144 {
 145     unsigned int a;
 146     fread(&a,4,1,fi);
 147     return BE_32_TO_NATIVE(a);
 148 }
 149
 150 struct png_header
 151 {
 152     int width;
 153     int height;
 154     int bpp;
 155     int mode;
 156 };
 157
 158 int png_read_header(FILE*fi, struct png_header*header)
 159 {
 160     char id[4];
 161     int len;
 162     int ok=0;
 163     U8 head[8] = {137,80,78,71,13,10,26,10};
 164     U8 head2[8];
 165     U8*data;
 166     fread(head2,8,1,fi);
 167     if(strncmp((char*)head,(char*)head2,4))
 168         return 0;
 169
 170     while(png_read_chunk(&id, &len, &data, fi))
 171     {
 172         if(VERBOSE(2))
 173             printf("%c%c%c%c %d\n", id[0],id[1],id[2],id[3],len);
 174         if(!strncasecmp(id, "IHDR", 4)) {
 175             char a,b,c,f,i;
 176             if(len < 8) exit(1);
 177             header->width = BE_32_TO_NATIVE(*(U32*)&data[0]);
 178             header->height = BE_32_TO_NATIVE(*(U32*)&data[4]);
 179             a = data[8];      // should be 8
 180             b = data[9];      // should be 3(indexed), 2(rgb), 0(grayscale) or 6(truecolor+alpha)
 181
 182             c = data[10];     // compression mode (0)
 183             f = data[11];     // filter mode (0)
 184             i = data[12];     // interlace mode (0)
 185
 186             if(VERBOSE(2)) printf("image mode:%d\n", b);
 187             if(VERBOSE(2)) printf("bpp: %d\n", a);
 188             if(VERBOSE(2)) printf("compression: %d\n", c);
 189             if(VERBOSE(2)) printf("filter: %d\n", f);
 190             if(VERBOSE(2)) printf("interlace: %d\n", i);
 191
 192             if(b!=0 && b!=2 && b!=3 && b!=6) {
 193                 fprintf(stderr, "Image mode %d not supported!\n", b);
 194                 if(b == 4) {
 195                     fprintf(stderr, "(This is a grayscale image with alpha channel-\n");
 196                     fprintf(stderr, " try converting it into an RGB image with alpha channel)\n");
 197                 }
 198                 exit(1);
 199             }
 200             if(a!=8 && (b==2 || b==6)) {
 201                 fprintf(stderr, "Bpp %d in mode %d not supported!\n", b, a);
 202                 exit(1);
 203             }
 204             if(c!=0) {
 205                 fprintf(stderr, "Compression mode %d not supported!\n", c);
 206                 exit(1);
 207             }
 208             if(f!=0) {
 209                 fprintf(stderr, "Filter mode %d not supported!\n", f);
 210                 exit(1);
 211             }
 212             if(i!=0) {
 213                 fprintf(stderr, "Interlace mode %d not supported!\n", i);
 214                 exit(1);
 215             }
 216             if(VERBOSE(2))
 217                 printf("%dx%d %d %d %d %d %d\n",header->width, header->height, a,b,c,f,i);
 218             header->bpp = a;
 219             header->mode = b;
 220             ok = 1;
 221         }
 222
 223         free(data);
 224     }
 225     return ok;
 226 }
 227
 228 typedef unsigned char byte;
 229 #define ABS(a) ((a)>0?(a):(-(a)))
 230 byte inline PaethPredictor (byte a,byte b,byte c)
 231 {
 232         // a = left, b = above, c = upper left
 233         int p = a + b - c;        // initial estimate
 234         int pa = ABS(p - a);      // distances to a, b, c
 235         int pb = ABS(p - b);
 236         int pc = ABS(p - c);
 237         // return nearest of a,b,c,
 238         // breaking ties in order a,b,c.
 239         if (pa <= pb && pa <= pc)
 240                 return a;
 241         else if (pb <= pc)
 242                 return b;
 243         else return c;
 244 }
 245
 246 void applyfilter3(int mode, U8*src, U8*old, U8*dest, int width)
 247 {
 248     int x;
 249     unsigned char lastr=0;
 250     unsigned char lastg=0;
 251     unsigned char lastb=0;
 252     unsigned char upperlastr=0;
 253     unsigned char upperlastg=0;
 254     unsigned char upperlastb=0;
 255
 256     if(mode==0) {
 257         for(x=0;x<width;x++) {
 258             dest[0] = 255;
 259             dest[1] = src[0];
 260             dest[2] = src[1];
 261             dest[3] = src[2];
 262             dest+=4;
 263             src+=3;
 264         }
 265     }
 266     else if(mode==1) {
 267         for(x=0;x<width;x++) {
 268             dest[0] = 255;
 269             dest[1] = src[0]+lastr;
 270             dest[2] = src[1]+lastg;
 271             dest[3] = src[2]+lastb;
 272             lastr = dest[1];
 273             lastg = dest[2];
 274             lastb = dest[3];
 275             dest+=4;
 276             src+=3;
 277         }
 278     }
 279     else if(mode==2) {
 280         for(x=0;x<width;x++) {
 281             dest[0] = 255;
 282             dest[1] = src[0]+old[1];
 283             dest[2] = src[1]+old[2];
 284             dest[3] = src[2]+old[3];
 285             dest+=4;
 286             old+=4;
 287             src+=3;
 288         }
 289     }
 290     else if(mode==3) {
 291         for(x=0;x<width;x++) {
 292             dest[0] = 255;
 293             dest[1] = src[0]+(old[1]+lastr)/2;
 294             dest[2] = src[1]+(old[2]+lastg)/2;
 295             dest[3] = src[2]+(old[3]+lastb)/2;
 296             lastr = dest[1];
 297             lastg = dest[2];
 298             lastb = dest[3];
 299             dest+=4;
 300             old+=4;
 301             src+=3;
 302         }
 303     }
 304     else if(mode==4) {
 305         for(x=0;x<width;x++) {
 306             dest[0] = 255;
 307             dest[1] = src[0]+PaethPredictor(lastr,old[1],upperlastr);
 308             dest[2] = src[1]+PaethPredictor(lastg,old[2],upperlastg);
 309             dest[3] = src[2]+PaethPredictor(lastb,old[3],upperlastb);
 310             lastr = dest[1];
 311             lastg = dest[2];
 312             lastb = dest[3];
 313             upperlastr = old[1];
 314             upperlastg = old[2];
 315             upperlastb = old[3];
 316             dest+=4;
 317             old+=4;
 318             src+=3;
 319         }
 320     }
 321 }
 322
 323 void applyfilter4(int mode, U8*src, U8*old, U8*dest, int width)
 324 {
 325     int x;
 326     unsigned char lastr=0;
 327     unsigned char lastg=0;
 328     unsigned char lastb=0;
 329     unsigned char lasta=0; //TODO: 255?
 330     unsigned char upperlastr=0;
 331     unsigned char upperlastg=0;
 332     unsigned char upperlastb=0;
 333     unsigned char upperlasta=0; //TODO: 255?
 334
 335     if(mode==0) {
 336         for(x=0;x<width;x++) {
 337             dest[0] = src[3];
 338             dest[1] = src[0];
 339             dest[2] = src[1];
 340             dest[3] = src[2];
 341             dest+=4;
 342             src+=4;
 343         }
 344     }
 345     else if(mode==1) {
 346         for(x=0;x<width;x++) {
 347             dest[0] = src[3]+lasta;
 348             dest[1] = src[0]+lastr;
 349             dest[2] = src[1]+lastg;
 350             dest[3] = src[2]+lastb;
 351             lasta = dest[0];
 352             lastr = dest[1];
 353             lastg = dest[2];
 354             lastb = dest[3];
 355             dest+=4;
 356             src+=4;
 357         }
 358     }
 359     else if(mode==2) {
 360         for(x=0;x<width;x++) {
 361             dest[0] = src[3]+old[0];
 362             dest[1] = src[0]+old[1];
 363             dest[2] = src[1]+old[2];
 364             dest[3] = src[2]+old[3];
 365             dest+=4;
 366             old+=4;
 367             src+=4;
 368         }
 369     }
 370     else if(mode==3) {
 371         for(x=0;x<width;x++) {
 372             dest[0] = src[3]+(old[0]+lasta)/2;
 373             dest[1] = src[0]+(old[1]+lastr)/2;
 374             dest[2] = src[1]+(old[2]+lastg)/2;
 375             dest[3] = src[2]+(old[3]+lastb)/2;
 376             lasta = dest[0];
 377             lastr = dest[1];
 378             lastg = dest[2];
 379             lastb = dest[3];
 380             dest+=4;
 381             old+=4;
 382             src+=4;
 383         }
 384     }
 385     else if(mode==4) {
 386         for(x=0;x<width;x++) {
 387             dest[0] = src[3]+PaethPredictor(lasta,old[0],upperlasta);
 388             dest[1] = src[0]+PaethPredictor(lastr,old[1],upperlastr);
 389             dest[2] = src[1]+PaethPredictor(lastg,old[2],upperlastg);
 390             dest[3] = src[2]+PaethPredictor(lastb,old[3],upperlastb);
 391             lasta = dest[0];
 392             lastr = dest[1];
 393             lastg = dest[2];
 394             lastb = dest[3];
 395             upperlasta = old[0];
 396             upperlastr = old[1];
 397             upperlastg = old[2];
 398             upperlastb = old[3];
 399             dest+=4;
 400             old+=4;
 401             src+=4;
 402         }
 403     }
 404
 405 }
 406
 407 void applyfilter1(int mode, U8*src, U8*old, U8*dest, int width)
 408 {
 409     int x;
 410     unsigned char last=0;
 411     unsigned char upperlast=0;
 412
 413     if(mode==0) {
 414         for(x=0;x<width;x++) {
 415             *dest = *src;
 416             dest++;
 417             src++;
 418         }
 419     }
 420     else if(mode==1) {
 421         for(x=0;x<width;x++) {
 422             *dest = *src+last;
 423             last = *dest;
 424             dest++;
 425             src++;
 426         }
 427     }
 428     else if(mode==2) {
 429         for(x=0;x<width;x++) {
 430             *dest = *src+*old;
 431             dest++;
 432             old++;
 433             src++;
 434         }
 435     }
 436     else if(mode==3) {
 437         for(x=0;x<width;x++) {
 438             *dest = *src+(*old+last)/2;
 439             last = *dest;
 440             dest++;
 441             old++;
 442             src++;
 443         }
 444     }
 445     else if(mode==4) {
 446         for(x=0;x<width;x++) {
 447             *dest = *src+PaethPredictor(last,*old,upperlast);
 448             last = *dest;
 449             upperlast = *old;
 450             dest++;
 451             old++;
 452             src++;
 453         }
 454     }
 455
 456 }
 457
 458 TAG *MovieAddFrame(SWF * swf, TAG * t, char *sname, int id)
 459 {
 460     SHAPE *s;
 461     SRECT r;
 462     MATRIX m;
 463     int fs;
 464
 465     unsigned width=0, height=0;
 466
 467 #ifndef HAVE_JPEGLIB
 468     if(global.mkjpeg) {
 469         global.mkjpeg = 0;
 470         msg("<warning> No jpeg support compiled in");
 471     }
 472 #endif
 473     if(global.mkjpeg) {
 474 #ifdef HAVE_JPEGLIB
 475         RGBA*data = 0;
 476         png_load(sname, &width, &height, (unsigned char**)&data);
 477         if(!data)
 478             exit(1);
 479         if(swf_ImageHasAlpha(data, width, height)) {
 480             t = swf_InsertTag(t, ST_DEFINEBITSJPEG3);
 481             swf_SetU16(t, id);
 482             swf_SetJPEGBits3(t, width,height,data,global.mkjpeg);
 483         } else {
 484             t = swf_InsertTag(t, ST_DEFINEBITSJPEG2);
 485             swf_SetU16(t, id);
 486             swf_SetJPEGBits2(t, width,height,data,global.mkjpeg);
 487         }
 488 #endif
 489     } else {
 490         RGBA*data = 0;
 491         png_load(sname, &width, &height, (unsigned char**)&data);
 492         if(!data)
 493             exit(1);
 494         t = swf_InsertTag(t, ST_DEFINEBITSLOSSLESS);
 495         swf_SetU16(t, id);
 496         swf_SetLosslessImage(t, data,width,height);
 497     }
 498
 499     t = swf_InsertTag(t, ST_DEFINESHAPE3);
 500
 501     swf_ShapeNew(&s);
 502     swf_GetMatrix(NULL, &m);
 503     m.sx = (int)(20 * 0x10000);
 504     m.sy = (int)(20 * 0x10000);
 505     m.tx = 0;
 506     m.ty = 0;
 507     fs = swf_ShapeAddBitmapFillStyle(s, &m, id, 1);
 508
 509     swf_SetU16(t, id + 1);      // id
 510
 511     r.xmin = r.ymin = 0;
 512     r.xmax = width * 20;
 513     r.ymax = height * 20;
 514     swf_SetRect(t, &r);
 515
 516     swf_SetShapeHeader(t, s);
 517
 518     swf_ShapeSetAll(t, s, 0, 0, 0, fs, 0);
 519     swf_ShapeSetLine(t, s, r.xmax, 0);
 520     swf_ShapeSetLine(t, s, 0, r.ymax);
 521     swf_ShapeSetLine(t, s, -r.xmax, 0);
 522     swf_ShapeSetLine(t, s, 0, -r.ymax);
 523
 524     swf_ShapeSetEnd(t);
 525
 526     t = swf_InsertTag(t, ST_REMOVEOBJECT2);
 527     swf_SetU16(t, 50);          // depth
 528
 529     t = swf_InsertTag(t, ST_PLACEOBJECT2);
 530
 531     swf_GetMatrix(NULL, &m);
 532     m.sx = (int)(0x10000 * global.scale);
 533     m.sy = (int)(0x10000 * global.scale);
 534
 535     if(custom_move) {
 536         m.tx = move_x*20;
 537         m.ty = move_y*20;
 538     } else {
 539         m.tx = (swf->movieSize.xmax - (int) (width * global.scale * 20)) / 2;
 540         m.ty = (swf->movieSize.ymax - (int) (height * global.scale * 20)) / 2;
 541     }
 542     swf_ObjectPlace(t, id + 1, 50, &m, NULL, NULL);
 543
 544     t = swf_InsertTag(t, ST_SHOWFRAME);
 545
 546     return t;
 547 }
 548
 549
 550 int CheckInputFile(char *fname, char **realname)
 551 {
 552     FILE *fi;
 553     char *s = malloc(strlen(fname) + 5);
 554     struct png_header head;
 555
 556     if (!s)
 557         exit(2);
 558     (*realname) = s;
 559     strcpy(s, fname);
 560
 561     // Check whether file exists (with typical extensions)
 562
 563     if ((fi = fopen(s, "rb")) == NULL) {
 564         sprintf(s, "%s.png", fname);
 565         if ((fi = fopen(s, "rb")) == NULL) {
 566             sprintf(s, "%s.PNG", fname);
 567             if ((fi = fopen(s, "rb")) == NULL) {
 568                 sprintf(s, "%s.Png", fname);
 569                 if ((fi = fopen(s, "rb")) == NULL) {
 570                     fprintf(stderr, "Couldn't open %s!\n", fname);
 571                     return -1;
 572                 }
 573             }
 574         }
 575     }
 576
 577     if(!png_read_header(fi, &head)) {
 578         fprintf(stderr, "%s is not a PNG file!\n", fname);
 579         return -1;
 580     }
 581
 582     if (global.max_image_width < head.width)
 583         global.max_image_width = head.width;
 584     if (global.max_image_height < head.height)
 585         global.max_image_height = head.height;
 586
 587     fclose(fi);
 588
 589     return 0;
 590 }
 591
 592 int args_callback_option(char *arg, char *val)
 593 {
 594     int res = 0;
 595     if (arg[1])
 596         res = -1;
 597     else
 598         switch (arg[0]) {
 599         case 'r':
 600             if (val)
 601                 global.framerate = atof(val);
 602             /* removed framerate>0 restriction in order to make
 603                Flash Communication Server compatible SWFs */
 604             if ((global.framerate < 0) ||(global.framerate >= 256.0)) {
 605                 if (VERBOSE(1))
 606                     fprintf(stderr,
 607                             "Error: You must specify a valid framerate between 1/256 and 255.\n");
 608                 exit(1);
 609             }
 610             res = 1;
 611             break;
 612
 613         case 'o':
 614             if (val)
 615                 global.outfile = val;
 616             res = 1;
 617             break;
 618
 619         case 's':
 620             global.scale = atof(val)/100;
 621             res = 1;
 622             break;
 623
 624         case 'z':
 625             if(global.version<6)
 626                 global.version = 6;
 627             res = 0;
 628             break;
 629
 630         case 'j':
 631             global.mkjpeg = atoi(val);
 632             res = 1;
 633             break;
 634
 635         case 'T':
 636             global.version = atoi(val);
 637             res = 1;
 638             break;
 639
 640         case 'C':
 641             global.do_cgi = 1;
 642             break;
 643
 644         case 'v':
 645             global.verbose++;
 646             res = 0;
 647             break;
 648
 649         case 'q':
 650             global.verbose--;
 651             if(global.verbose<0)
 652                 global.verbose = 0;
 653             res = 0;
 654             break;
 655
 656         case 'X':
 657             if (val)
 658                 global.force_width = atoi(val);
 659             res = 1;
 660             break;
 661
 662         case 'Y':
 663             if (val)
 664                 global.force_height = atoi(val);
 665             res = 1;
 666             break;
 667
 668         case 'V':
 669             printf("png2swf - part of %s %s\n", PACKAGE, VERSION);
 670             exit(0);
 671
 672         case 'c': {
 673             char*s = strdup(val);
 674             char*x1 = strtok(s, ":");
 675             char*y1 = strtok(0, ":");
 676             char*x2 = strtok(0, ":");
 677             char*y2 = strtok(0, ":");
 678             if(!(x1 && y1 && x2 && y2)) {
 679                 fprintf(stderr, "-m option requires four arguments, <x1>:<y1>:<x2>:<y2>\n");
 680                 exit(1);
 681             }
 682             custom_clip = 1;
 683             clip_x1 = atoi(x1);
 684             clip_y1 = atoi(y1);
 685             clip_x2 = atoi(x2);
 686             clip_y2 = atoi(y2);
 687             free(s);
 688
 689             res = 1;
 690             break;
 691         }
 692
 693         case 'm': {
 694             char*s = strdup(val);
 695             char*c = strchr(s, ':');
 696             if(!c) {
 697                 fprintf(stderr, "-m option requires two arguments, <x>:<y>\n");
 698                 exit(1);
 699             }
 700             *c = 0;
 701             custom_move = 1;
 702             move_x = atoi(val);
 703             move_y = atoi(c+1);
 704             free(s);
 705
 706             res = 1;
 707             break;
 708         }
 709
 710         default:
 711             res = -1;
 712             break;
 713         }
 714
 715     if (res < 0) {
 716         if (VERBOSE(1))
 717             fprintf(stderr, "Unknown option: -%s\n", arg);
 718         exit(1);
 719         return 0;
 720     }
 721     return res;
 722 }
 723
 724 static struct options_t options[] = {
 725 {"r", "rate"},
 726 {"o", "output"},
 727 {"j", "jpeg"},
 728 {"z", "zlib"},
 729 {"T", "flashversion"},
 730 {"X", "pixel"},
 731 {"Y", "pixel"},
 732 {"v", "verbose"},
 733 {"q", "quiet"},
 734 {"C", "cgi"},
 735 {"V", "version"},
 736 {"s", "scale"},
 737 {0,0}
 738 };
 739
 740 int args_callback_longoption(char *name, char *val)
 741 {
 742     return args_long2shortoption(options, name, val);
 743 }
 744
 745 int args_callback_command(char *arg, char *next)        // actually used as filename
 746 {
 747     char *s;
 748     if (CheckInputFile(arg, &s) < 0) {
 749         if (VERBOSE(1))
 750             fprintf(stderr, "Error opening input file: %s\n", arg);
 751         free(s);
 752     } else {
 753         image[global.nfiles].filename = s;
 754         global.nfiles++;
 755         if (global.nfiles >= MAX_INPUT_FILES) {
 756             if (VERBOSE(1))
 757                 fprintf(stderr, "Error: Too many input files.\n");
 758             exit(1);
 759         }
 760     }
 761     return 0;
 762 }
 763
 764 void args_callback_usage(char *name)
 765 {
 766     printf("\n");
 767     printf("Usage: %s [-X width] [-Y height] [-o file.swf] [-r rate] file1.png [file2.png...]\n", name);
 768     printf("\n");
 769     printf("-r , --rate <framerate>        Set movie framerate (frames per second)\n");
 770     printf("-o , --output <filename>       Set name for SWF output file.\n");
 771     printf("-j , --jpeg <quality>          Generate a lossy jpeg bitmap inside the SWF, with a given quality (1-100)\n");
 772     printf("-z , --zlib <zlib>             Enable Flash 6 (MX) Zlib Compression\n");
 773     printf("-T , --flashversion            Set the flash version to generate\n");
 774     printf("-X , --pixel <width>           Force movie width to <width> (default: autodetect)\n");
 775     printf("-Y , --pixel <height>          Force movie height to <height> (default: autodetect)\n");
 776     printf("-v , --verbose <level>         Set verbose level (0=quiet, 1=default, 2=debug)\n");
 777     printf("-q , --quiet                   Omit normal log messages, only log errors\n");
 778     printf("-C , --cgi                     For use as CGI- prepend http header, write to stdout\n");
 779     printf("-V , --version                 Print version information and exit\n");
 780     printf("-s , --scale <percent>         Scale image to <percent>%% size.\n");
 781     printf("\n");
 782 }
 783
 784 int main(int argc, char **argv)
 785 {
 786     SWF swf;
 787     TAG *t;
 788
 789     memset(&global, 0x00, sizeof(global));
 790
 791     global.framerate = 1.0;
 792     global.verbose = 1;
 793     global.version = 8;
 794     global.scale = 1.0;
 795
 796     processargs(argc, argv);
 797
 798     if(global.nfiles<=0) {
 799         fprintf(stderr, "No png files found in arguments\n");
 800         return 1;
 801     }
 802
 803     if (VERBOSE(2))
 804         fprintf(stderr, "Processing %i file(s)...\n", global.nfiles);
 805
 806     t = MovieStart(&swf, global.framerate,
 807                    global.force_width ? global.force_width : (int)(global.max_image_width*global.scale),
 808                    global.force_height ? global.force_height : (int)(global.max_image_height*global.scale));
 809
 810     {
 811         int i;
 812         for (i = 0; i < global.nfiles; i++) {
 813             if (VERBOSE(3))
 814                 fprintf(stderr, "[%03i] %s\n", i,
 815                         image[i].filename);
 816             t = MovieAddFrame(&swf, t, image[i].filename, (i * 2) + 1);
 817             free(image[i].filename);
 818         }
 819     }
 820
 821     MovieFinish(&swf, t, global.outfile);
 822
 823     return 0;
 824 }