src/swfbbox.c

   1 /* swfbbox.c
   2    Tool for playing around with SWF bounding boxes.
   3
   4    Part of the swftools package.
   5
   6    Copyright (c) 2003 Matthias Kramm <kramm@quiss.org>
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
  21
  22 #include "../config.h"
  23 #include <stdio.h>
  24 #include <stdarg.h>
  25 #include <assert.h>
  26 #include <unistd.h>
  27 #include <fcntl.h>
  28 #include "../lib/rfxswf.h"
  29 #include "../lib/args.h"
  30 #include "../lib/log.h"
  31
  32 static char * filename = 0;
  33 static char * outfilename = "output.swf";
  34 static int optimize = 0;
  35 static int swifty = 0;
  36 static int verbose = 0;
  37 static int showbbox = 1;
  38 static int showorigbbox = 0;
  39 static int expand = 1;
  40
  41 static struct options_t options[] = {
  42 {"h", "help"},
  43 {"O", "optimize"},
  44 {"S", "swifty"},
  45 {"o", "output"},
  46 {"b", "bbox"},
  47 {"B", "newbbox"},
  48 {"e", "expand"},
  49 {"v", "verbose"},
  50 {"V", "version"},
  51 {0,0}
  52 };
  53
  54 int args_callback_option(char*name,char*val)
  55 {
  56     if(!strcmp(name, "V")) {
  57         printf("swfbbox - part of %s %s\n", PACKAGE, VERSION);
  58         exit(0);
  59     }
  60     else if(!strcmp(name, "b")) {
  61         showorigbbox = 1;
  62         if(showbbox == 1) showbbox = 0;
  63         return 0;
  64     }
  65     else if(!strcmp(name, "B")) {
  66         showbbox = 2;
  67         return 0;
  68     }
  69     else if(!strcmp(name, "O")) {
  70         optimize = 1;
  71         if(showbbox == 1) showbbox = 0;
  72         return 0;
  73     }
  74     else if(!strcmp(name, "S")) {
  75         swifty = 1;
  76         if(showbbox == 1) showbbox = 0;
  77         return 0;
  78     }
  79     else if(!strcmp(name, "v")) {
  80         verbose ++;
  81         return 0;
  82     }
  83     else if(!strcmp(name, "q")) {
  84         verbose --;
  85         return 0;
  86     }
  87     else if(!strcmp(name, "e")) {
  88         expand = 1;
  89         return 0;
  90     }
  91     else if(!strcmp(name, "o")) {
  92         outfilename = val;
  93         return 1;
  94     }
  95     else {
  96         printf("Unknown option: -%s\n", name);
  97         exit(1);
  98     }
  99
 100     return 0;
 101 }
 102 int args_callback_longoption(char*name,char*val)
 103 {
 104     return args_long2shortoption(options, name, val);
 105 }
 106 void args_callback_usage(char *name)
 107 {
 108     printf("\n");
 109     printf("Usage: %s [-OSe] file.swf\n", name);
 110     printf("\n");
 111     printf("-h , --help                    Print help and exit\n");
 112     printf("-S , --swifty                  Print out transformed bounding boxes\n");
 113     printf("-O , --optimize                Recalculate bounding boxes and write new file\n");
 114     printf("-e , --expand                  Recalculate main bounding box and write new file\n");
 115     printf("-o , --output <filename>       Set output filename to <filename> (for -O/-e)\n");
 116     printf("-v , --verbose                 Be more verbose\n");
 117     printf("-V , --version                 Print program version and exit\n");
 118     printf("\n");
 119 }
 120 int args_callback_command(char*name,char*val)
 121 {
 122     if(filename) {
 123         fprintf(stderr, "Only one file allowed. You supplied at least two. (%s and %s)\n",
 124                  filename, name);
 125     }
 126     filename = name;
 127     return 0;
 128 }
 129
 130 #define swf_ResetReadBits(tag)   if (tag->readBit)  { tag->pos++; tag->readBit = 0; }
 131
 132 void swf_Shape2Optimize(SHAPE2*shape)
 133 {
 134     if(!shape->bbox)
 135         shape->bbox = malloc(sizeof(SRECT));
 136     *(shape->bbox) = swf_GetShapeBoundingBox(shape);
 137 }
 138
 139 /*
 140    {char {x1 y1 x2 y2 x3 y3 x4 y4]]
 141 */
 142
 143 SRECT bboxes[65536];
 144 U16 depth2id[65536];
 145 char*depth2name[65536];
 146
 147 int hasid(TAG*tag)
 148 {
 149     if(tag->id == ST_PLACEOBJECT)
 150         return 1;
 151     if(tag->id == ST_PLACEOBJECT2 && (tag->data[0] & 2))
 152         return 1;
 153     return 0;
 154 }
 155
 156 int hasname(TAG*tag)
 157 {
 158     if(tag->id == ST_PLACEOBJECT)
 159         return 0;
 160     if(tag->id == ST_PLACEOBJECT2 && (tag->data[0] & 0x20))
 161         return 1;
 162     return 0;
 163 }
 164
 165 char* getname(TAG*tag)
 166 {
 167     if(tag->id == ST_PLACEOBJECT)
 168         return 0;
 169     if(tag->id == ST_PLACEOBJECT2 && (tag->data[0] & 0x20)) {
 170         SWFPLACEOBJECT o;
 171         tag->pos = 0;tag->readBit = 0;
 172         swf_GetPlaceObject(tag, &o);
 173         return o.name;
 174     }
 175     return 0;
 176 }
 177
 178 MATRIX getmatrix(TAG*tag)
 179 {
 180     SWFPLACEOBJECT o;
 181     tag->pos = 0;tag->readBit = 0;
 182     swf_GetPlaceObject(tag, &o);
 183     return o.matrix;
 184 }
 185
 186
 187 static int fontnum = -1;
 188 static SWFFONT**fonts;
 189 static SWF*c_swf;
 190 static void fontcallback1(U16 id,U8 * name)
 191 { fontnum++;
 192 }
 193 static void fontcallback2(U16 id,U8 * name)
 194 {
 195     fonts[fontnum] = 0;
 196     swf_FontExtract(c_swf,id,&fonts[fontnum]);
 197     if(verbose) {
 198         if(fonts[fontnum]) printf("Extracting font %d (%s)\n", id, name);
 199         else               printf("Extracting font %d (%s) failed\n", id, name);
 200         fflush(stdout);
 201     }
 202     fontnum++;
 203 }
 204 typedef struct _textbounds
 205 {
 206     SRECT r;
 207     MATRIX m; // character transform matrix
 208 } textbounds_t;
 209
 210 static void textcallback(void*self, int*chars, int*xpos, int nr, int fontid, int fontsize,
 211                     int xstart, int ystart, RGBA* color)
 212 {
 213     textbounds_t * bounds = (textbounds_t*)self;
 214     SWFFONT*font = 0;
 215     int t;
 216     for(t=0;t<fontnum;t++) {
 217         if(fonts[t]->id == fontid) {
 218             font = fonts[t];
 219             break;
 220         }
 221     }
 222     if(!font) {
 223         fprintf(stderr, "Font %d unknown\n", fontid);
 224         exit(1);
 225     }
 226     if(!font->layout) {
 227         /* This is an expensive operation- but what should we do, we
 228            need the glyph's bounding boxes */
 229         swf_FontCreateLayout(font);
 230     }
 231
 232     if(verbose)
 233         printf("%d chars, font %d, size %d, at (%d,%d)\n", nr, fontid, fontsize, xstart, ystart);
 234
 235     for(t=0;t<nr;t++) {
 236         /* not tested yet- the matrix/fontsize calculation is probably all wrong */
 237         int x = xstart + xpos[t];
 238         int y = ystart;
 239         int ch;
 240         SRECT newglyphbbox, glyphbbox = font->layout->bounds[chars[t]];
 241         MATRIX m = bounds->m;
 242
 243         if(chars[t] < font->numchars && font->glyph2ascii) {
 244             ch = font->glyph2ascii[chars[t]];
 245         }
 246
 247         m.sx = (m.sx * fontsize) / 1024;
 248         m.sy = (m.sy * fontsize) / 1024;
 249         m.r0 = (m.r0 * fontsize) / 1024;
 250         m.r1 = (m.r1 * fontsize) / 1024;
 251
 252         m.tx += x;
 253         m.ty += y;
 254         newglyphbbox = swf_TurnRect(glyphbbox, &m);
 255
 256         if(ch<32) ch='?';
 257
 258         swf_ExpandRect2(&(bounds->r), &newglyphbbox);
 259         if(verbose >= 2) {
 260             printf("%5d %c, %d %d %d %d (%d %d %d %d) -> %d %d %d %d\n",
 261                 xpos[t], ch,
 262                 glyphbbox.xmin, glyphbbox.ymin, glyphbbox.xmax, glyphbbox.ymax,
 263                 newglyphbbox.xmin, newglyphbbox.ymin, newglyphbbox.xmax, newglyphbbox.ymax,
 264                 bounds->r.xmin, bounds->r.ymin, bounds->r.xmax, bounds->r.ymax);
 265         }
 266
 267     }
 268 }
 269
 270 static void swf_OptimizeBoundingBoxes(SWF*swf)
 271 {
 272     TAG* tag = swf->firstTag;
 273
 274     while (tag) {
 275         if (tag->id == ST_DEFINESHAPE ||
 276             tag->id == ST_DEFINESHAPE2 ||
 277             tag->id == ST_DEFINESHAPE3) {
 278             SHAPE2 s;
 279             if(verbose) printf("%s\n", swf_TagGetName(tag));
 280             swf_ParseDefineShape(tag, &s);
 281             swf_Shape2Optimize(&s);
 282             tag->len = 2;
 283             tag->pos = 0;
 284             swf_SetShape2(tag, &s);
 285         }
 286         if (tag->id == ST_DEFINETEXT || tag->id == ST_DEFINETEXT2) {
 287             SRECT oldbox;
 288             int matrix_offset;
 289             int len;
 290             U8*data;
 291             textbounds_t bounds;
 292             if(verbose) printf("%s\n", swf_TagGetName(tag));
 293             if(fontnum < 0) {
 294                 if(verbose) printf("Extracting fonts...\n");
 295                 c_swf = swf;
 296                 fontnum = 0;
 297                 swf_FontEnumerate(swf,&fontcallback1);
 298                 fonts = (SWFFONT**)malloc(fontnum*sizeof(SWFFONT*));
 299                 memset(fonts, 0, fontnum*sizeof(SWFFONT*));
 300                 fontnum = 0;
 301                 swf_FontEnumerate(swf,&fontcallback2);
 302             }
 303
 304             memset(&bounds, 0, sizeof(bounds));
 305
 306             swf_SetTagPos(tag, 0);
 307             swf_GetU16(tag);
 308             swf_GetRect(tag,&oldbox);
 309             swf_ResetReadBits(tag);
 310             matrix_offset = tag->pos;
 311             swf_GetMatrix(tag,&bounds.m);
 312             swf_ParseDefineText(tag, textcallback, &bounds);
 313             if(verbose) {
 314                 printf("\n");
 315                 swf_DumpMatrix(stdout, &bounds.m);
 316                 printf("old: %d %d %d %d\n", oldbox.xmin, oldbox.ymin, oldbox.xmax, oldbox.ymax);
 317                 printf("new: %d %d %d %d\n", bounds.r.xmin, bounds.r.ymin, bounds.r.xmax, bounds.r.ymax);
 318             }
 319
 320             /* now comes the tricky part:
 321                we have to fiddle the data back in
 322                thank heavens that the bbox is follow by a matrix
 323                struct, which always starts on a byte boundary.
 324              */
 325             len = tag->len - matrix_offset;
 326             data = malloc(len);
 327             memcpy(data, &tag->data[matrix_offset], len);
 328             tag->writeBit = 0;
 329             tag->len = 2;
 330             swf_SetRect(tag, &bounds.r);
 331             swf_SetBlock(tag, data, len);
 332             free(data);
 333             tag->pos = tag->readBit = 0;
 334         }
 335         tag = tag->next;
 336     }
 337 }
 338
 339 static void showSwiftyOutput(SWF*swf)
 340 {
 341     TAG*tag = swf->firstTag;
 342     int frame=0;
 343     printf("{\n\t{frame %d}\n", frame++);
 344
 345     while (tag) {
 346         if (tag->id == ST_SHOWFRAME) {
 347             printf("}\n{\n\t{frame %d}\n", frame++);
 348         }
 349         if (tag->id == ST_PLACEOBJECT || tag->id == ST_PLACEOBJECT2) {
 350             if(hasid(tag)) {
 351                 depth2id[swf_GetDepth(tag)] = swf_GetPlaceID(tag);
 352             }
 353             if(hasname(tag)) {
 354                 depth2name[swf_GetDepth(tag)] = getname(tag);
 355             }
 356         }
 357         if (tag->id == ST_PLACEOBJECT || tag->id == ST_PLACEOBJECT2) {
 358             MATRIX m = getmatrix(tag);
 359             U16 id = depth2id[swf_GetDepth(tag)];
 360             char*name = depth2name[swf_GetDepth(tag)];
 361             char buf[40];
 362             SRECT bbox = bboxes[id];
 363             SPOINT p1,p2,p3,p4;
 364             p1.x = bbox.xmin; p1.y = bbox.ymin;
 365             p2.x = bbox.xmax; p2.y = bbox.ymin;
 366             p3.x = bbox.xmin; p3.y = bbox.ymax;
 367             p4.x = bbox.xmax; p4.y = bbox.ymax;
 368             p1 = swf_TurnPoint(p1, &m);
 369             p2 = swf_TurnPoint(p2, &m);
 370             p3 = swf_TurnPoint(p3, &m);
 371             p4 = swf_TurnPoint(p4, &m);
 372             if(!name) {
 373                 sprintf(buf, "ID%d", id);name = buf;
 374             }
 375             //printf("\t#%.4f %.4f %.4f %.4f | %.4f %.4f\n", m.sx/65536.0, m.r1/65536.0, m.r0/65536.0, m.sy/65536.0, m.tx/20.0, m.ty/20.0);
 376             printf("\t{%s {%.2f %.2f %.2f %.2f %.2f %.2f %.2f %.2f}}\n", name,
 377                     p1.x/20.0, p1.y/20.0, p2.x/20.0, p2.y/20.0,
 378                     p3.x/20.0, p3.y/20.0, p4.x/20.0, p4.y/20.0);
 379         }
 380         tag = tag->next;
 381     }
 382     printf("}\n");
 383 }
 384 static SRECT getMovieClipBBox(TAG*tag)
 385 {
 386     //TAG*tag = swf->firstTag;
 387     int frame=0;
 388     SRECT movieSize;
 389     U16 depth2id[65536];
 390     memset(depth2id, 0, sizeof(depth2id));
 391
 392     memset(&movieSize,0,sizeof(SRECT));
 393
 394     while (tag->id != ST_END) {
 395         if (tag->id == ST_PLACEOBJECT || tag->id == ST_PLACEOBJECT2) {
 396             if(hasid(tag)) {
 397                 depth2id[swf_GetDepth(tag)] = swf_GetPlaceID(tag);
 398             }
 399         }
 400         if (tag->id == ST_PLACEOBJECT || tag->id == ST_PLACEOBJECT2) {
 401             MATRIX m = getmatrix(tag);
 402             U16 id = depth2id[swf_GetDepth(tag)];
 403             SRECT bbox = bboxes[id];
 404
 405             SRECT tbbox = swf_TurnRect(bbox, &m);
 406             swf_ExpandRect2(&movieSize, &tbbox);
 407         }
 408         tag = tag->next;
 409     }
 410     return movieSize;
 411 }
 412
 413 static SRECT getSWFBBox(SWF*swf)
 414 {
 415     SRECT movieSize = getMovieClipBBox(swf->firstTag);
 416
 417     return movieSize;
 418 }
 419
 420 int main (int argc,char ** argv)
 421 {
 422     TAG*tag;
 423     SWF swf;
 424     int fi;
 425     SRECT oldMovieSize;
 426     SRECT newMovieSize;
 427     memset(bboxes, 0, sizeof(bboxes));
 428     memset(depth2name, 0, sizeof(depth2name));
 429
 430     processargs(argc, argv);
 431     initLog(0,0,0,0,0,verbose?LOGLEVEL_DEBUG:LOGLEVEL_WARNING);
 432
 433     if(!filename) {
 434         fprintf(stderr, "You must supply a filename.\n");
 435         return 1;
 436     }
 437
 438     fi = open(filename,O_RDONLY|O_BINARY);
 439
 440     if (fi<0)
 441     {
 442         perror("Couldn't open file: ");
 443         exit(1);
 444     }
 445     if FAILED(swf_ReadSWF(fi,&swf))
 446     {
 447         fprintf(stderr, "%s is not a valid SWF file or contains errors.\n",filename);
 448         close(fi);
 449         exit(1);
 450     }
 451     close(fi);
 452
 453     swf_OptimizeTagOrder(&swf);
 454     swf_FoldAll(&swf);
 455
 456     /* Optimize bounding boxes in case -O flag was set */
 457     if(optimize) {
 458         swf_OptimizeBoundingBoxes(&swf);
 459     }
 460
 461     /* Create an ID to Bounding Box table */
 462     tag = swf.firstTag;
 463     while (tag) {
 464         if(swf_isDefiningTag(tag)) {
 465             int id = swf_GetDefineID(tag);
 466             if(tag->id != ST_DEFINESPRITE) {
 467                 bboxes[id] = swf_GetDefineBBox(tag);
 468             } else {
 469                 swf_UnFoldSprite(tag);
 470                 bboxes[id] = getMovieClipBBox(tag);
 471                 swf_FoldSprite(tag);
 472                 if(verbose) {
 473                     printf("sprite %d is %.2fx%.2f\n", id,
 474                             (bboxes[id].xmax - bboxes[id].xmin)/20.0,
 475                             (bboxes[id].ymax - bboxes[id].ymin)/20.0);
 476                 }
 477             }
 478         }
 479         tag = tag->next;
 480     }
 481
 482     /* Create an ID->Bounding Box table for all bounding boxes */
 483     if(swifty) {
 484         showSwiftyOutput(&swf);
 485     }
 486
 487     oldMovieSize = swf.movieSize;
 488     newMovieSize = getSWFBBox(&swf);
 489
 490     if(optimize || expand) {
 491
 492         if(expand)
 493             swf.movieSize = newMovieSize;
 494
 495         fi = open(outfilename, O_BINARY | O_RDWR | O_CREAT | O_TRUNC, 0666);
 496         if(swf_WriteSWF(fi, &swf) < 0) {
 497             fprintf(stderr, "Error writing file %s", outfilename);
 498             close(fi);
 499             exit(1);
 500         }
 501         close(fi);
 502     }
 503
 504     if(showbbox) {
 505         if(verbose>=0)
 506             printf("Real Movie Size: ");
 507         printf("%.2f x %.2f :%.2f :%.2f\n",
 508                 (newMovieSize.xmax-newMovieSize.xmin)/20.0,
 509                 (newMovieSize.ymax-newMovieSize.ymin)/20.0,
 510                 (newMovieSize.xmin)/20.0,
 511                 (newMovieSize.ymin)/20.0
 512                 );
 513     }
 514     if(showorigbbox) {
 515         if(verbose>=0)
 516             printf("Original Movie Size: ");
 517         printf("%.2f x %.2f :%.2f :%.2f\n",
 518                 (oldMovieSize.xmax-oldMovieSize.xmin)/20.0,
 519                 (oldMovieSize.ymax-oldMovieSize.ymin)/20.0,
 520                 (oldMovieSize.xmin)/20.0,
 521                 (oldMovieSize.ymin)/20.0
 522                 );
 523     }
 524
 525     swf_FreeTags(&swf);
 526     return 0;
 527 }