lib/rfxswf.c

   1 /* vi: set sts=2 sw=2 :*/
   2 /* rfxswf.c
   3
   4    Library for creating and reading SWF files or parts of it.
   5    There's a module directory which provides some extended functionality.
   6    Most modules are included at the bottom of this file.
   7
   8    Part of the swftools package.
   9
  10    Copyright (c) 2000-2003 Rainer Böhme <rfxswf@reflex-studio.de>
  11    Copyright (c) 2003 Matthias Kramm <kramm@quiss.org>
  12
  13    This program is free software; you can redistribute it and/or modify
  14    it under the terms of the GNU General Public License as published by
  15    the Free Software Foundation; either version 2 of the License, or
  16    (at your option) any later version.
  17
  18    This program is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21    GNU General Public License for more details.
  22
  23    You should have received a copy of the GNU General Public License
  24    along with this program; if not, write to the Free Software
  25    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
  26
  27 #include "rfxswf.h"
  28
  29 #ifdef HAVE_JPEGLIB
  30 #define HAVE_BOOLEAN
  31 #include <jpeglib.h>
  32 #endif // HAVE_JPEGLIB
  33
  34 #ifdef HAVE_ZLIB
  35 #include <zlib.h>
  36 #endif // HAVE_ZLIB
  37
  38 #ifndef RFXSWF_DISABLESOUND
  39 #ifdef HAVE_LAME
  40 #include "lame/lame.h"
  41 #endif
  42 #endif
  43
  44 #ifdef HAVE_TIME_H
  45 #include <time.h>
  46 #endif
  47
  48 #include "./bitio.h"
  49 #include "./MD5.h"
  50
  51 // internal constants
  52
  53 #define MALLOC_SIZE     128
  54 #define INSERT_RFX_TAG
  55
  56 #define MEMSIZE(l) (((l/MALLOC_SIZE)+1)*MALLOC_SIZE)
  57
  58
  59 // inline wrapper functions
  60
  61 TAG * swf_NextTag(TAG * t) { return t->next; }
  62 TAG * swf_PrevTag(TAG * t) { return t->prev; }
  63 U16   swf_GetTagID(TAG * t)    { return t->id; }
  64 U32   swf_GetTagLen(TAG * t) { return t->len; }
  65 U8*   swf_GetTagLenPtr(TAG * t) { return &(t->data[t->len]); }
  66 U32   swf_GetTagPos(TAG * t)   { return t->pos; }
  67
  68 // for future purpose: avoid high level lib functions to change tagpos/bitpos
  69
  70 #define swf_SaveTagPos(tag)
  71 #define swf_RestoreTagPos(tag)
  72
  73 void swf_SetTagPos(TAG * t,U32 pos)
  74 { swf_ResetReadBits(t);
  75   if (pos<=t->len) t->pos = pos;
  76   else {
  77 #ifdef DEBUG_RFXSWF
  78     fprintf(stderr,"SetTagPos(%d) out of bounds: TagID = %i\n",pos, t->id);
  79 #endif
  80   }
  81 }
  82
  83 char* swf_GetString(TAG*t)
  84 {
  85     char* str = ((char*)(&(t)->data[(t)->pos]));
  86     while(swf_GetU8(t));
  87     return str;
  88 }
  89
  90 U8 swf_GetU8(TAG * t)
  91 { swf_ResetReadBits(t);
  92   #ifdef DEBUG_RFXSWF
  93     if (t->pos>=t->len)
  94     { fprintf(stderr,"GetU8() out of bounds: TagID = %i\n",t->id);
  95       return 0;
  96     }
  97   #endif
  98   return t->data[t->pos++];
  99 }
 100
 101 U16 swf_GetU16(TAG * t)
 102 { U16 res;
 103   swf_ResetReadBits(t);
 104   #ifdef DEBUG_RFXSWF
 105     if (t->pos>(t->len-2))
 106     { fprintf(stderr,"GetU16() out of bounds: TagID = %i\n",t->id);
 107       return 0;
 108     }
 109   #endif
 110   res = t->data[t->pos] | (t->data[t->pos+1]<<8);
 111   t->pos+=2;
 112   return res;
 113 }
 114
 115 U32 swf_GetU32(TAG * t)
 116 { U32 res;
 117   swf_ResetReadBits(t);
 118   #ifdef DEBUG_RFXSWF
 119     if (t->pos>(t->len-4))
 120     { fprintf(stderr,"GetU32() out of bounds: TagID = %i\n",t->id);
 121       return 0;
 122     }
 123   #endif
 124   res = t->data[t->pos]        | (t->data[t->pos+1]<<8) |
 125        (t->data[t->pos+2]<<16) | (t->data[t->pos+3]<<24);
 126   t->pos+=4;
 127   return res;
 128 }
 129
 130 int swf_GetBlock(TAG * t,U8 * b,int l)
 131 // returns number of bytes written (<=l)
 132 // b = NULL -> skip data
 133 { swf_ResetReadBits(t);
 134   if ((t->len-t->pos)<l) l=t->len-t->pos;
 135   if (b && l) memcpy(b,&t->data[t->pos],l);
 136   t->pos+=l;
 137   return l;
 138 }
 139
 140 int swf_SetBlock(TAG * t,U8 * b,int l)
 141 // Appends Block to the end of Tagdata, returns size
 142 { U32 newlen = t->len + l;
 143   swf_ResetWriteBits(t);
 144   if (newlen>t->memsize)
 145   { U32  newmem  = MEMSIZE(newlen);
 146     U8 * newdata = (U8*)((t->data)?realloc(t->data,newmem):malloc(newmem));
 147     if (!newdata)
 148     {
 149       #ifdef DEBUG_RFXSWF
 150         fprintf(stderr,"Fatal Error: malloc()/realloc() failed (1). (%d bytes)\n", newmem);
 151         *(int*)0=0;
 152       #endif
 153       return 0;
 154     }
 155     t->memsize = newmem;
 156     t->data    = newdata;
 157   }
 158   if (b) memcpy(&t->data[t->len],b,l);
 159   else memset(&t->data[t->len],0x00,l);
 160   t->len+=l;
 161   return l;
 162 }
 163
 164 int swf_SetU8(TAG * t,U8 v)
 165 { swf_ResetWriteBits(t);
 166   if ((t->len+1)>t->memsize) return (swf_SetBlock(t,&v,1)==1)?0:-1;
 167   t->data[t->len++] = v;
 168   return 0;
 169 }
 170
 171 int swf_SetU16(TAG * t,U16 v)
 172 { U8 a[2];
 173   a[0] = v&0xff;
 174   a[1] = v>>8;
 175
 176   swf_ResetWriteBits(t);
 177   if ((t->len+2)>t->memsize) return (swf_SetBlock(t,a,2)==2)?0:-1;
 178   t->data[t->len++] = a[0];
 179   t->data[t->len++] = a[1];
 180   return 0;
 181 }
 182
 183 int swf_SetU32(TAG * t,U32 v)
 184 { U8 a[4];
 185   a[0] = v&0xff;        // to ensure correct handling of non-intel byteorder
 186   a[1] = (v>>8)&0xff;
 187   a[2] = (v>>16)&0xff;
 188   a[3] = (v>>24)&0xff;
 189
 190   swf_ResetWriteBits(t);
 191   if ((t->len+4)>t->memsize) return (swf_SetBlock(t,a,4)==4)?0:-1;
 192   t->data[t->len++] = a[0];
 193   t->data[t->len++] = a[1];
 194   t->data[t->len++] = a[2];
 195   t->data[t->len++] = a[3];
 196   return 0;
 197 }
 198
 199 U32 swf_GetBits(TAG * t,int nbits)
 200 { U32 res = 0;
 201   if (!nbits) return 0;
 202   if (!t->readBit) t->readBit = 0x80;
 203   while (nbits)
 204   { res<<=1;
 205     if (t->data[t->pos]&t->readBit) res|=1;
 206     t->readBit>>=1;
 207     nbits--;
 208     if (!t->readBit)
 209     { if (nbits) t->readBit = 0x80;
 210       #ifdef DEBUG_RFXSWF
 211       if (t->pos>=t->len)
 212       { fprintf(stderr,"GetBits() out of bounds: TagID = %i\n",t->id);
 213         return res;
 214       }
 215       #endif
 216       t->pos++;
 217     }
 218   }
 219   return res;
 220 }
 221
 222 S32 swf_GetSBits(TAG * t,int nbits)
 223 { U32 res = swf_GetBits(t,nbits);
 224   if (res&(1<<(nbits-1))) res|=(0xffffffff<<nbits);
 225   return (S32)res;
 226 }
 227
 228 U32 reader_GetBits(struct reader_t*reader, int nbits)
 229 { return reader_readbits(reader, nbits);
 230 }
 231 S32 reader_GetSBits(struct reader_t*reader, int nbits)
 232 { U32 res = reader_readbits(reader, nbits);
 233   if (res&(1<<(nbits-1))) res|=(0xffffffff<<nbits);
 234   return (S32)res;
 235 }
 236
 237 int swf_SetBits(TAG * t,U32 v,int nbits)
 238 { U32 bm = 1<<(nbits-1);
 239
 240   while (nbits)
 241   { if (!t->writeBit)
 242     { if (FAILED(swf_SetU8(t,0))) return -1;
 243       t->writeBit = 0x80;
 244     }
 245     if (v&bm) t->data[t->len-1] |= t->writeBit;
 246     bm>>=1;
 247     t->writeBit>>=1;
 248     nbits--;
 249   }
 250   return 0;
 251 }
 252
 253 // Advanced Data Access Functions
 254
 255 int swf_SetRGB(TAG * t,RGBA * col)
 256 { if (!t) return -1;
 257   if (col)
 258   { swf_SetU8(t,col->r);
 259     swf_SetU8(t,col->g);
 260     swf_SetU8(t,col->b);
 261   } else swf_SetBlock(t,NULL,3);
 262   return 0;
 263 }
 264 void swf_GetRGB(TAG * t, RGBA * col)
 265 {
 266     RGBA dummy;
 267     if(!col)
 268         col = &dummy;
 269     col->r = swf_GetU8(t);
 270     col->g = swf_GetU8(t);
 271     col->b = swf_GetU8(t);
 272     col->a = 255;
 273 }
 274
 275 int swf_SetRGBA(TAG * t,RGBA * col)
 276 { if (!t) return -1;
 277   if (col)
 278   { swf_SetU8(t,col->r);
 279     swf_SetU8(t,col->g);
 280     swf_SetU8(t,col->b);
 281     swf_SetU8(t,col->a);
 282   } else swf_SetBlock(t,NULL,4);
 283   return 0;
 284 }
 285 void swf_GetRGBA(TAG * t, RGBA * col)
 286 {
 287     RGBA dummy;
 288     if(!col)
 289         col = &dummy;
 290     col->r = swf_GetU8(t);
 291     col->g = swf_GetU8(t);
 292     col->b = swf_GetU8(t);
 293     col->a = swf_GetU8(t);
 294 }
 295
 296 void swf_GetGradient(TAG * tag, GRADIENT * gradient, char alpha)
 297 {
 298     GRADIENT dummy;
 299     int t;
 300     if(!tag) {
 301       memset(gradient, 0, sizeof(GRADIENT));
 302       return;
 303     }
 304     if(!gradient)
 305         gradient = &dummy;
 306     gradient->num = swf_GetU8(tag);
 307     for(t=0;t<gradient->num;t++)
 308     {
 309         int s=t;
 310         if(s>=8) //FIXME
 311             s=7;
 312         gradient->ratios[t] = swf_GetU8(tag);
 313         if(!alpha)
 314             swf_GetRGB(tag, &gradient->rgba[t]);
 315         else
 316             swf_GetRGBA(tag, &gradient->rgba[t]);
 317     }
 318 }
 319
 320 void swf_SetGradient(TAG * tag, GRADIENT * gradient, char alpha)
 321 {
 322     int t;
 323     if(!tag) {
 324       memset(gradient, 0, sizeof(GRADIENT));
 325       return;
 326     }
 327     swf_SetU8(tag, gradient->num);
 328     for(t=0; t<8 && t<gradient->num; t++)
 329     {
 330         swf_SetU8(tag, gradient->ratios[t]);
 331         if(!alpha)
 332             swf_SetRGB(tag, &gradient->rgba[t]);
 333         else
 334             swf_SetRGBA(tag, &gradient->rgba[t]);
 335     }
 336 }
 337
 338 int swf_CountUBits(U32 v,int nbits)
 339 { int n = 32;
 340   U32 m = 0x80000000;
 341   if(v == 0x00000000) n = 0;
 342   else
 343     while (!(v&m))
 344     { n--;
 345       m>>=1;
 346     }
 347   return (n>nbits)?n:nbits;
 348 }
 349
 350 int swf_CountBits(U32 v,int nbits)
 351 { int n = 33;
 352   U32 m = 0x80000000;
 353   if (v&m)
 354   { if(v == 0xffffffff) n = 1;
 355     else
 356     while (v&m)
 357     { n--;
 358       m>>=1;
 359     }
 360   }
 361   else
 362   { if(v == 0x00000000) n = 0;
 363     else
 364     while (!(v&m))
 365     { n--;
 366       m>>=1;
 367     }
 368   }
 369   return (n>nbits)?n:nbits;
 370 }
 371
 372 int swf_GetRect(TAG * t,SRECT * r)
 373 { int nbits;
 374   SRECT dummy;
 375   if(!t) {r->xmin=r->xmax=r->ymin=r->ymax=0;return 0;}
 376   if (!r) r = &dummy;
 377   nbits = (int) swf_GetBits(t,5);
 378   r->xmin = swf_GetSBits(t,nbits);
 379   r->xmax = swf_GetSBits(t,nbits);
 380   r->ymin = swf_GetSBits(t,nbits);
 381   r->ymax = swf_GetSBits(t,nbits);
 382   return 0;
 383 }
 384
 385 int reader_GetRect(struct reader_t*reader,SRECT * r)
 386 { int nbits;
 387   SRECT dummy;
 388   if (!r) r = &dummy;
 389   nbits = (int) reader_GetBits(reader,5);
 390   r->xmin = reader_GetSBits(reader,nbits);
 391   r->xmax = reader_GetSBits(reader,nbits);
 392   r->ymin = reader_GetSBits(reader,nbits);
 393   r->ymax = reader_GetSBits(reader,nbits);
 394   return 0;
 395 }
 396
 397 int swf_SetRect(TAG * t,SRECT * r)
 398 { int nbits;
 399
 400   nbits = swf_CountBits(r->xmin,0);
 401   nbits = swf_CountBits(r->xmax,nbits);
 402   nbits = swf_CountBits(r->ymin,nbits);
 403   nbits = swf_CountBits(r->ymax,nbits);
 404   if(nbits>=32) {
 405     fprintf(stderr, "rfxswf: Warning: num_bits overflow in swf_SetRect\n");
 406     nbits=31;
 407   }
 408
 409   swf_SetBits(t,nbits,5);
 410   swf_SetBits(t,r->xmin,nbits);
 411   swf_SetBits(t,r->xmax,nbits);
 412   swf_SetBits(t,r->ymin,nbits);
 413   swf_SetBits(t,r->ymax,nbits);
 414
 415   return 0;
 416 }
 417
 418 void swf_ExpandRect(SRECT*src, SPOINT add)
 419 {
 420     if((src->xmin | src->ymin | src->xmax | src->ymax)==0) {
 421         src->xmin = add.x;
 422         src->ymin = add.y;
 423         src->xmax = add.x;
 424         src->ymax = add.y;
 425         if((add.x|add.y) == 0) src->xmax++; //make sure the bbox is not NULL anymore
 426         return;
 427     }
 428     if(add.x < src->xmin)
 429         src->xmin = add.x;
 430     if(add.x > src->xmax)
 431         src->xmax = add.x;
 432     if(add.y < src->ymin)
 433         src->ymin = add.y;
 434     if(add.y > src->ymax)
 435         src->ymax = add.y;
 436 }
 437 void swf_ExpandRect2(SRECT*src, SRECT*add)
 438 {
 439     if((add->xmin | add->ymin | add->xmax | add->ymax)==0)
 440         return;
 441     if((src->xmin | src->ymin | src->xmax | src->ymax)==0)
 442         *src = *add;
 443     if(add->xmin < src->xmin)
 444         src->xmin = add->xmin;
 445     if(add->ymin < src->ymin)
 446         src->ymin = add->ymin;
 447     if(add->xmax > src->xmax)
 448         src->xmax = add->xmax;
 449     if(add->ymax > src->ymax)
 450         src->ymax = add->ymax;
 451 }
 452 void swf_ExpandRect3(SRECT*src, SPOINT center, int radius)
 453 {
 454     if((src->xmin | src->ymin | src->xmax | src->ymax)==0) {
 455         src->xmin = center.x-radius;
 456         src->ymin = center.y-radius;
 457         src->xmax = center.x+radius;
 458         src->ymax = center.y+radius;
 459         if((center.x|center.y|radius) == 0) src->xmax++; //make sure the bbox is not NULL anymore
 460         return;
 461     }
 462     if(center.x - radius < src->xmin)
 463         src->xmin = center.x - radius;
 464     if(center.x + radius > src->xmax)
 465         src->xmax = center.x - radius;
 466     if(center.y - radius < src->ymin)
 467         src->ymin = center.y - radius;
 468     if(center.y + radius > src->ymax)
 469         src->ymax = center.y - radius;
 470 }
 471 SPOINT swf_TurnPoint(SPOINT p, MATRIX* m)
 472 {
 473     SPOINT r;
 474     r.x = (int)(m->sx*(1/65536.0)*p.x + m->r1*(1/65536.0)*p.y + 0.5) + m->tx;
 475     r.y = (int)(m->r0*(1/65536.0)*p.x + m->sy*(1/65536.0)*p.y + 0.5) + m->ty;
 476     return r;
 477 }
 478 SRECT swf_TurnRect(SRECT r, MATRIX* m)
 479 {
 480     SRECT g;
 481     SPOINT p1,p2,p3,p4,pp1,pp2,pp3,pp4;
 482     p1.x = r.xmin;p1.y = r.ymin;
 483     p2.x = r.xmax;p2.y = r.ymin;
 484     p3.x = r.xmin;p3.y = r.ymax;
 485     p4.x = r.xmax;p4.y = r.ymax;
 486     pp1 = swf_TurnPoint(p1, m);
 487     pp2 = swf_TurnPoint(p2, m);
 488     pp3 = swf_TurnPoint(p3, m);
 489     pp4 = swf_TurnPoint(p4, m);
 490     g.xmin = g.xmax = pp1.x;
 491     g.ymin = g.ymax = pp1.y;
 492     swf_ExpandRect(&g, pp2);
 493     swf_ExpandRect(&g, pp3);
 494     swf_ExpandRect(&g, pp4);
 495     return g;
 496 }
 497
 498
 499 int swf_GetMatrix(TAG * t,MATRIX * m)
 500 { MATRIX dummy;
 501   int nbits;
 502
 503   if (!m) m = &dummy;
 504
 505   if (!t)
 506   { m->sx = m->sy = 0x10000;
 507     m->r0 = m->r1 = 0;
 508     m->tx = m->ty = 0;
 509     return -1;
 510   }
 511
 512   swf_ResetReadBits(t);
 513
 514   if (swf_GetBits(t,1))
 515   { nbits = swf_GetBits(t,5);
 516     m->sx = swf_GetSBits(t,nbits);
 517     m->sy = swf_GetSBits(t,nbits);
 518   }
 519   else m->sx = m->sy = 0x10000;
 520
 521   if (swf_GetBits(t,1))
 522   { nbits = swf_GetBits(t,5);
 523     m->r0 = swf_GetSBits(t,nbits);
 524     m->r1 = swf_GetSBits(t,nbits);
 525   }
 526   else m->r0 = m->r1 = 0x0;
 527
 528   nbits = swf_GetBits(t,5);
 529   m->tx = swf_GetSBits(t,nbits);
 530   m->ty = swf_GetSBits(t,nbits);
 531
 532   return 0;
 533 }
 534
 535 int swf_SetMatrix(TAG * t,MATRIX * m)
 536 { int nbits;
 537   MATRIX ma;
 538
 539   if (!m)
 540   { m = &ma;
 541     ma.sx = ma.sy = 0x10000;
 542     ma.r0 = ma.r1 = 0;
 543     ma.tx = ma.ty = 0;
 544   }
 545
 546   swf_ResetWriteBits(t);
 547
 548   if ((m->sx==0x10000)&&(m->sy==0x10000)) swf_SetBits(t,0,1);
 549   else
 550   { swf_SetBits(t,1,1);
 551     nbits = swf_CountBits(m->sx,0);
 552     nbits = swf_CountBits(m->sy,nbits);
 553     if(nbits>=32) {
 554         fprintf(stderr,"rfxswf: Error: matrix values too large\n");
 555         nbits = 31;
 556     }
 557     swf_SetBits(t,nbits,5);
 558     swf_SetBits(t,m->sx,nbits);
 559     swf_SetBits(t,m->sy,nbits);
 560   }
 561
 562   if ((!m->r0)&&(!m->r1)) swf_SetBits(t,0,1);
 563   else
 564   { swf_SetBits(t,1,1);
 565     nbits = swf_CountBits(m->r0,0);
 566     nbits = swf_CountBits(m->r1,nbits);
 567     if(nbits>=32) {
 568         fprintf(stderr,"rfxswf: Error: matrix values too large\n");
 569         nbits = 31;
 570     }
 571     swf_SetBits(t,nbits,5);
 572     swf_SetBits(t,m->r0,nbits);
 573     swf_SetBits(t,m->r1,nbits);
 574   }
 575
 576   nbits = swf_CountBits(m->tx,0);
 577   nbits = swf_CountBits(m->ty,nbits);
 578   if(nbits>=32) {
 579       fprintf(stderr,"rfxswf: Error: matrix values too large\n");
 580       nbits = 31;
 581   }
 582   swf_SetBits(t,nbits,5);
 583   swf_SetBits(t,m->tx,nbits);
 584   swf_SetBits(t,m->ty,nbits);
 585
 586   return 0;
 587 }
 588
 589 int swf_GetCXForm(TAG * t,CXFORM * cx,U8 alpha) //FIXME: alpha should be type bool
 590 { CXFORM cxf;
 591   int hasadd;
 592   int hasmul;
 593   int nbits;
 594
 595   if (!cx) cx = &cxf;
 596
 597   cx->a0 = cx->r0 = cx->g0 = cx->b0 = 256;
 598   cx->a1 = cx->r1 = cx->g1 = cx->b1 = 0;
 599
 600   if (!t) return 0;
 601
 602   swf_ResetReadBits(t);
 603   hasadd = swf_GetBits(t,1);
 604   hasmul = swf_GetBits(t,1);
 605   nbits  = swf_GetBits(t,4);
 606
 607   if (hasmul)
 608   { cx->r0 = (S16)swf_GetSBits(t,nbits);
 609     cx->g0 = (S16)swf_GetSBits(t,nbits);
 610     cx->b0 = (S16)swf_GetSBits(t,nbits);
 611     if (alpha)
 612       cx->a0 = (S16)swf_GetSBits(t,nbits);
 613   }
 614
 615   if (hasadd)
 616   { cx->r1 = (S16)swf_GetSBits(t,nbits);
 617     cx->g1 = (S16)swf_GetSBits(t,nbits);
 618     cx->b1 = (S16)swf_GetSBits(t,nbits);
 619     if (alpha)
 620       cx->a1 = (S16)swf_GetSBits(t,nbits);
 621   }
 622
 623   return 0;
 624 }
 625
 626 int swf_SetCXForm(TAG * t,CXFORM * cx,U8 alpha)
 627 { CXFORM cxf;
 628   int hasadd;
 629   int hasmul;
 630   int nbits;
 631
 632   if (!cx)
 633   { cx = &cxf;
 634     cx->a0 = cx->r0 = cx->g0 = cx->b0 = 256;
 635     cx->a1 = cx->r1 = cx->g1 = cx->b1 = 0;
 636   }
 637
 638   if (!alpha)
 639   { cx->a0 = 256;
 640     cx->a1 = 0;
 641   }
 642
 643   nbits = 0;
 644
 645   hasmul = (cx->a0!=256)||(cx->r0!=256)||(cx->g0!=256)||(cx->b0!=256);
 646   hasadd = cx->a1|cx->r1|cx->g1|cx->b1;
 647
 648   if (hasmul)
 649   { if (alpha) nbits = swf_CountBits((S32)cx->a0,nbits);
 650     nbits = swf_CountBits((S32)cx->r0,nbits);
 651     nbits = swf_CountBits((S32)cx->g0,nbits);
 652     nbits = swf_CountBits((S32)cx->b0,nbits);
 653   }
 654
 655   if (hasadd)
 656   { if (alpha) nbits = swf_CountBits((S32)cx->a1,nbits);
 657     nbits = swf_CountBits((S32)cx->r1,nbits);
 658     nbits = swf_CountBits((S32)cx->g1,nbits);
 659     nbits = swf_CountBits((S32)cx->b1,nbits);
 660   }
 661
 662   swf_ResetWriteBits(t);
 663   swf_SetBits(t,hasadd?1:0,1);
 664   swf_SetBits(t,hasmul?1:0,1);
 665   swf_SetBits(t,nbits,4);
 666
 667   if (hasmul)
 668   { swf_SetBits(t,cx->r0,nbits);
 669     swf_SetBits(t,cx->g0,nbits);
 670     swf_SetBits(t,cx->b0,nbits);
 671     if (alpha) swf_SetBits(t,cx->a0,nbits);
 672   }
 673
 674   if (hasadd)
 675   { swf_SetBits(t,cx->r1,nbits);
 676     swf_SetBits(t,cx->g1,nbits);
 677     swf_SetBits(t,cx->b1,nbits);
 678     if (alpha) swf_SetBits(t,cx->a1,nbits);
 679   }
 680
 681   return 0;
 682 }
 683
 684 //int swf_GetPoint(TAG * t,SPOINT * p) { return 0; }
 685 //int swf_SetPoint(TAG * t,SPOINT * p) { return 0; }
 686
 687 void  swf_SetPassword(TAG * t, const char * password)
 688 {
 689     /* WARNING: crypt_md5 is not reentrant */
 690     char salt[3];
 691     char* md5string;
 692
 693 #if defined(HAVE_LRAND48) && defined(HAVE_SRAND48) && defined(HAVE_TIME_H) && defined(HAVE_TIME)
 694     srand48(time(0));
 695     salt[0] = "abcdefghijklmnopqrstuvwxyz0123456789"[lrand48()%36];
 696     salt[1] = "abcdefghijklmnopqrstuvwxyz0123456789"[lrand48()%36];
 697 #else
 698     salt[0] = 'l';
 699     salt[1] = '8';
 700     fprintf(stderr, "rfxswf: Warning- no usable random generator found\n");
 701     fprintf(stderr, "Your password will be vulnerable to dictionary attacks\n");
 702 #endif
 703
 704     md5string = crypt_md5(password, salt);
 705
 706     swf_SetU16(t,0);
 707     swf_SetString(t, md5string);
 708 }
 709
 710 int swf_VerifyPassword(TAG * t, const char * password)
 711 {
 712     char*md5string1, *md5string2;
 713     char*x;
 714     char*md5, *salt;
 715     int n;
 716
 717     if(t->len >= 5 && t->pos==0 &&
 718        t->data[0] == 0 &&
 719        t->data[1] == 0) {
 720       swf_GetU16(t);
 721     } else {
 722       printf("%d %d %d %d\n", t->len, t->pos, t->data[0], t->data[1]);
 723     }
 724
 725     md5string1 = swf_GetString(t);
 726
 727     if(strncmp(md5string1, "$1$",3 )) {
 728         fprintf(stderr, "rfxswf: no salt in pw string\n");
 729         return 0;
 730     }
 731     x = strchr(md5string1+3, '$');
 732     if(!x) {
 733         fprintf(stderr, "rfxswf: invalid salt format in pw string\n");
 734         return 0;
 735     }
 736     n = x-(md5string1+3);
 737     salt = (char*)malloc(n+1);
 738     memcpy(salt, md5string1+3, n);
 739     salt[n] = 0;
 740
 741     md5string2 = crypt_md5(password, salt);
 742     free(salt);
 743     if(strcmp(md5string1, md5string2) != 0)
 744         return 0;
 745     return 1;
 746 }
 747
 748 // Tag List Manipulating Functions
 749
 750 TAG * swf_InsertTag(TAG * after,U16 id)
 751 { TAG * t;
 752
 753   t = (TAG *)malloc(sizeof(TAG));
 754   if (t)
 755   { memset(t,0x00,sizeof(TAG));
 756     t->id = id;
 757
 758     if (after)
 759     {
 760       t->prev  = after;
 761       t->next  = after->next;
 762       after->next = t;
 763       if (t->next) t->next->prev = t;
 764     }
 765   }
 766   return t;
 767 }
 768
 769 TAG * swf_InsertTagBefore(SWF* swf, TAG * before,U16 id)
 770 { TAG * t;
 771
 772   t = (TAG *)malloc(sizeof(TAG));
 773   if (t)
 774   { memset(t,0x00,sizeof(TAG));
 775     t->id = id;
 776
 777     if (before)
 778     {
 779       t->next  = before;
 780       t->prev  = before->prev;
 781       before->prev = t;
 782       if (t->prev) t->prev->next = t;
 783     }
 784   }
 785   if(swf && swf->firstTag == before) {
 786     swf->firstTag = t;
 787   }
 788   return t;
 789 }
 790
 791 void swf_ClearTag(TAG * t)
 792 {
 793   if (t->data) free(t->data);
 794   t->data = 0;
 795   t->pos = 0;
 796   t->len = 0;
 797   t->readBit = 0;
 798   t->writeBit = 0;
 799   t->memsize = 0;
 800 }
 801
 802 void swf_ResetTag(TAG*tag, U16 id)
 803 {
 804     tag->len = tag->pos = tag->readBit = tag->writeBit = 0;
 805     tag->id = id;
 806 }
 807
 808 int swf_DeleteTag(TAG * t)
 809 { if (!t) return -1;
 810
 811   if (t->prev) t->prev->next = t->next;
 812   if (t->next) t->next->prev = t->prev;
 813
 814   if (t->data) free(t->data);
 815   free(t);
 816   return 0;
 817 }
 818
 819 TAG * swf_ReadTag(struct reader_t*reader, TAG * prev)
 820 { TAG * t;
 821   U16 raw;
 822   U32 len;
 823   int id;
 824
 825   if (reader->read(reader, &raw, 2) !=2 ) return NULL;
 826   raw = SWAP16(raw);
 827
 828   len = raw&0x3f;
 829   id  = raw>>6;
 830
 831   if (len==0x3f)
 832   {
 833       if (reader->read(reader, &len, 4) != 4) return NULL;
 834       len = SWAP32(len);
 835   }
 836
 837   if (id==ST_DEFINESPRITE) len = 2*sizeof(U16);
 838   // Sprite handling fix: Flatten sprite tree
 839
 840   t = (TAG *)malloc(sizeof(TAG));
 841
 842   if (!t)
 843   {
 844     #ifdef DEBUG_RFXSWF
 845       fprintf(stderr,"Fatal Error: malloc()/realloc() failed (2). (%d bytes)\n", sizeof(TAG));
 846     #endif
 847     return NULL;
 848   }
 849
 850   memset(t,0x00,sizeof(TAG));
 851
 852   t->len = len;
 853   t->id  = id;
 854
 855   if (t->len)
 856   { t->data = (U8*)malloc(t->len);
 857     if (!t->data)
 858     {
 859       #ifdef DEBUG_RFXSWF
 860         fprintf(stderr,"Fatal Error: malloc()/realloc() failed (3). (%d bytes)\n", t->len);
 861       #endif
 862       return NULL;
 863     }
 864     t->memsize = t->len;
 865     if (reader->read(reader, t->data, t->len) != t->len) return NULL;
 866   }
 867
 868   if (prev)
 869   {
 870     t->prev  = prev;
 871     prev->next = t;
 872   }
 873
 874   return t;
 875 }
 876
 877 int swf_DefineSprite_GetRealSize(TAG * t);
 878
 879 int swf_WriteTag2(struct writer_t*writer, TAG * t)
 880 // returns tag length in bytes (incl. Header), -1 = Error
 881 // writer = 0 -> no output
 882 { U16 raw[3];
 883   U32 len;
 884   int short_tag;
 885
 886   if (!t) return -1;
 887
 888   len = (t->id==ST_DEFINESPRITE)?swf_DefineSprite_GetRealSize(t):t->len;
 889
 890   short_tag = len<0x3f&&(t->id!=ST_DEFINEBITSLOSSLESS&&t->id!=ST_DEFINEBITSLOSSLESS2);
 891
 892   if (writer)
 893   { if (short_tag)
 894     { raw[0] = SWAP16(len|((t->id&0x3ff)<<6));
 895       if (writer->write(writer,raw,2)!=2)
 896       {
 897         #ifdef DEBUG_RFXSWF
 898           fprintf(stderr,"WriteTag() failed: Short Header.\n");
 899         #endif
 900         return -1;
 901       }
 902     }
 903     else
 904     {
 905       raw[0] = SWAP16((t->id<<6)|0x3f);
 906       if (writer->write(writer,raw,2)!=2)
 907       {
 908 #ifdef DEBUG_RFXSWF
 909           fprintf(stderr,"WriteTag() failed: Long Header (1).\n");
 910 #endif
 911           return -1;
 912       }
 913
 914       len = SWAP32(len);
 915       if (writer->write(writer,&len,4)!=4)
 916       {
 917         #ifdef DEBUG_RFXSWF
 918           fprintf(stderr,"WriteTag() failed: Long Header (2).\n");
 919         #endif
 920         return -1;
 921       }
 922     }
 923
 924     if (t->data)
 925     { if (writer->write(writer,t->data,t->len)!=t->len)
 926       {
 927         #ifdef DEBUG_RFXSWF
 928           fprintf(stderr,"WriteTag() failed: Data.\n");
 929         #endif
 930         return -1;
 931       }
 932     }
 933     #ifdef DEBUG_RFXSWF
 934       else if (t->len) fprintf(stderr,"WriteTag(): Tag Data Error, id=%i\n",t->id);
 935     #endif
 936   }
 937
 938   return t->len+(short_tag?2:6);
 939 }
 940
 941 int swf_WriteTag(int handle, TAG * t)
 942 {
 943   struct writer_t writer;
 944   int len = 0;
 945   if(handle<0)
 946     return swf_WriteTag2(0, t);
 947   writer_init_filewriter(&writer, handle);
 948   len = swf_WriteTag2(&writer, t);
 949   writer.finish(&writer);
 950   return len;
 951 }
 952
 953 int swf_DefineSprite_GetRealSize(TAG * t)
 954 // Sprite Handling: Helper function to pack DefineSprite-Tag
 955 { U32 len = t->len;
 956   if(len>4) { // folded sprite
 957       return t->len;
 958   }
 959   do
 960   { t = swf_NextTag(t);
 961     if (t && t->id!=ST_DEFINESPRITE) len += swf_WriteTag(-1, t);
 962     else t = NULL;
 963   } while (t&&(t->id!=ST_END));
 964   return len;
 965 }
 966
 967 void swf_UnFoldSprite(TAG * t)
 968 {
 969   U16 id,tmp;
 970   U32 len;
 971   TAG*next = t;
 972   U16 spriteid,spriteframes;
 973   int level;
 974   if(t->id!=ST_DEFINESPRITE)
 975     return;
 976   if(t->len<=4) // not folded
 977     return;
 978
 979   swf_SetTagPos(t,0);
 980
 981   spriteid = swf_GetU16(t); //id
 982   spriteframes = swf_GetU16(t); //frames
 983
 984   level = 1;
 985
 986   while(1)
 987   {
 988     TAG*it = 0;
 989     tmp = swf_GetU16(t);
 990     len = tmp&0x3f;
 991     id  = tmp>>6;
 992     if(id == ST_END)
 993         level--;
 994     if(id == ST_DEFINESPRITE && len<=4)
 995         level++;
 996
 997     if (len==0x3f)
 998         len = swf_GetU32(t);
 999     it = swf_InsertTag(next, id);
1000     next = it;
1001     it->len = len;
1002     it->id  = id;
1003     if (it->len)
1004     { it->data = (U8*)malloc(it->len);
1005       it->memsize = it->len;
1006       swf_GetBlock(t, it->data, it->len);
1007     }
1008
1009     if(!level)
1010         break;
1011   }
1012
1013   free(t->data); t->data = 0;
1014   t->memsize = t->len = t->pos = 0;
1015
1016   swf_SetU16(t, spriteid);
1017   swf_SetU16(t, spriteframes);
1018 }
1019
1020 void swf_FoldSprite(TAG * t)
1021 {
1022   TAG*sprtag=t,*tmp;
1023   U16 id,frames,tmpid;
1024   int level;
1025   if(t->id!=ST_DEFINESPRITE)
1026       return;
1027   if(!t->len) {
1028       fprintf(stderr, "Error: Sprite has no ID!");
1029       return;
1030   }
1031   if(t->len>4) {
1032     /* sprite is already folded */
1033       return;
1034   }
1035
1036   t->pos = 0;
1037   id = swf_GetU16(t);
1038   free(t->data);
1039   t->len = t->pos = t->memsize = 0;
1040   t->data = 0;
1041
1042   frames = 0;
1043
1044   t = swf_NextTag(sprtag);
1045   level = 1;
1046
1047   do
1048   {
1049     if(t->id==ST_SHOWFRAME) frames++;
1050     if(t->id == ST_DEFINESPRITE && t->len<=4)
1051         level++;
1052     if(t->id == ST_END)
1053         level--;
1054     t = swf_NextTag(t);
1055   } while(t && level);
1056   if(level)
1057     fprintf(stderr, "rfxswf error: sprite doesn't end(1)\n");
1058
1059   swf_SetU16(sprtag, id);
1060   swf_SetU16(sprtag, frames);
1061
1062   t = swf_NextTag(sprtag);
1063   level = 1;
1064
1065   do
1066   {
1067     if(t->len<0x3f&&t->id!=ST_DEFINEBITSLOSSLESS&&t->id!=ST_DEFINEBITSLOSSLESS2) {
1068         swf_SetU16(sprtag,t->len|(t->id<<6));
1069     } else {
1070         swf_SetU16(sprtag,0x3f|(t->id<<6));
1071         swf_SetU32(sprtag,t->len);
1072     }
1073     if(t->len)
1074         swf_SetBlock(sprtag,t->data, t->len);
1075     tmp = t;
1076     if(t->id == ST_DEFINESPRITE && t->len<=4)
1077         level++;
1078     if(t->id == ST_END)
1079         level--;
1080     t = swf_NextTag(t);
1081     swf_DeleteTag(tmp);
1082   }
1083   while (t && level);
1084   if(level)
1085     fprintf(stderr, "rfxswf error: sprite doesn't end(2)\n");
1086
1087 //  sprtag->next = t;
1088 //  t->prev = sprtag;
1089 }
1090
1091 int swf_IsFolded(TAG * t)
1092 {
1093     return (t->id == ST_DEFINESPRITE && t->len>4);
1094 }
1095
1096 void swf_FoldAll(SWF*swf)
1097 {
1098     TAG*tag = swf->firstTag;
1099     //swf_DumpSWF(stdout, swf);
1100     while(tag) {
1101         if(tag->id == ST_DEFINESPRITE) {
1102             swf_FoldSprite(tag);
1103             //swf_DumpSWF(stdout, swf);
1104         }
1105         tag = swf_NextTag(tag);
1106     }
1107 }
1108
1109 void swf_UnFoldAll(SWF*swf)
1110 {
1111     TAG*tag = swf->firstTag;
1112     while(tag) {
1113         if(tag->id == ST_DEFINESPRITE)
1114             swf_UnFoldSprite(tag);
1115         tag = tag->next;
1116     }
1117 }
1118
1119 void swf_OptimizeTagOrder(SWF*swf)
1120 {
1121   TAG*tag,*next;
1122   TAG*level0;
1123   int level;
1124   int changes;
1125   swf_UnFoldAll(swf);
1126   /* at the moment, we don't actually do optimizing,
1127      only fixing of non-spec-conformant things like
1128      sprite tags */
1129
1130   do {
1131     changes = 0;
1132     level = 0;
1133     level0 = 0;
1134     tag = swf->firstTag;
1135     while(tag) {
1136       next = tag->next;
1137       if(tag->id == ST_DEFINESPRITE) {
1138         if(tag->len>4) {
1139           /* ??? all sprites are supposed to be unfolded */
1140           fprintf(stderr, "librfxswf error - internal error in OptimizeTagOrder/UnfoldAll\n");
1141         }
1142         level++;
1143         if(level==1) {
1144           level0 = tag;
1145           tag = next;
1146           continue;
1147         }
1148       }
1149       if(level>=1) {
1150         /* move non-sprite tags out of sprite */
1151         if(!swf_isAllowedSpriteTag(tag) || level>=2) {
1152           /* remove tag from current position */
1153           tag->prev->next = tag->next;
1154           if(tag->next)
1155             tag->next->prev = tag->prev;
1156
1157           /* insert before tag level0 */
1158           tag->next = level0;
1159           tag->prev = level0->prev;
1160           level0->prev = tag;
1161           tag->prev->next = tag;
1162           changes = 1;
1163         }
1164       }
1165       if(tag->id == ST_END) {
1166         level--;
1167       }
1168
1169       tag = next;
1170     }
1171   } while(changes);
1172 }
1173
1174 // Movie Functions
1175
1176 int swf_ReadSWF2(struct reader_t*reader, SWF * swf)   // Reads SWF to memory (malloc'ed), returns length or <0 if fails
1177 {
1178   if (!swf) return -1;
1179   memset(swf,0x00,sizeof(SWF));
1180
1181   { char b[32];                         // read Header
1182     int len;
1183     TAG * t;
1184     TAG t1;
1185     struct reader_t zreader;
1186
1187     if ((len = reader->read(reader ,b,8))<8) return -1;
1188
1189     if (b[0]!='F' && b[0]!='C') return -1;
1190     if (b[1]!='W') return -1;
1191     if (b[2]!='S') return -1;
1192     swf->fileVersion = b[3];
1193     swf->compressed  = (b[0]=='C')?1:0;
1194     swf->fileSize    = GET32(&b[4]);
1195
1196     if(swf->compressed) {
1197         reader_init_zlibinflate(&zreader, reader);
1198         reader = &zreader;
1199     }
1200
1201     reader_GetRect(reader, &swf->movieSize);
1202     reader->read(reader, &swf->frameRate, 2);
1203     swf->frameRate = SWAP16(swf->frameRate);
1204     reader->read(reader, &swf->frameCount, 2);
1205     swf->frameCount = SWAP16(swf->frameCount);
1206
1207     /* read tags and connect to list */
1208     t = &t1;
1209     while (t) t = swf_ReadTag(reader,t);
1210     swf->firstTag = t1.next;
1211     t1.next->prev = NULL;
1212   }
1213
1214   return reader->pos;
1215 }
1216
1217 int swf_ReadSWF(int handle, SWF * swf)
1218 {
1219   struct reader_t reader;
1220   reader_init_filereader(&reader, handle);
1221   return swf_ReadSWF2(&reader, swf);
1222 }
1223
1224 int  swf_WriteSWF2(struct writer_t*writer, SWF * swf)     // Writes SWF to file, returns length or <0 if fails
1225 { U32 len;
1226   TAG * t;
1227   int frameCount=0;
1228   struct writer_t zwriter;
1229   int fileSize = 0;
1230   int inSprite = 0;
1231   int writer_lastpos = 0;
1232   int ret;
1233
1234   if (!swf) return -1;
1235   if (!writer) return -1; // the caller should provide a nullwriter, not 0, for querying SWF size
1236
1237   if(writer) writer_lastpos = writer->pos;
1238
1239   // Insert REFLEX Tag
1240
1241 #ifdef INSERT_RFX_TAG
1242
1243   if (swf->firstTag && swf_NextTag(swf->firstTag))
1244     if (swf_GetTagID(swf_NextTag(swf->firstTag))!=ST_REFLEX)
1245       swf_SetBlock(swf_InsertTagBefore(swf, swf->firstTag,ST_REFLEX),"rfx",3);
1246
1247 #endif // INSERT_RFX_TAG
1248
1249   // Count Frames + File Size
1250
1251   len = 0;
1252   t = swf->firstTag;
1253   frameCount = 0;
1254
1255   while(t) {
1256       len += swf_WriteTag(-1,t);
1257       if(t->id == ST_DEFINESPRITE) inSprite++;
1258       else if(t->id == ST_END && inSprite) inSprite--;
1259       else if(t->id == ST_SHOWFRAME && !inSprite) frameCount++;
1260       t = swf_NextTag(t);
1261   }
1262
1263   { TAG t1;
1264     char b[64],b4[4];
1265     U32 l;
1266
1267     memset(&t1,0x00,sizeof(TAG));
1268     t1.data    = (U8*)b;
1269     t1.memsize = 64;
1270
1271     { // measure header file size
1272       TAG t2;
1273       char b2[64];
1274       memset(&t2,0x00,sizeof(TAG));
1275       t2.data    = (U8*)b2;
1276       t2.memsize = 64;
1277       swf_SetRect(&t2, &swf->movieSize);
1278       swf_SetU16(&t2, swf->frameRate);
1279       swf_SetU16(&t2, swf->frameCount);
1280       l = swf_GetTagLen(&t2)+8;
1281     }
1282     if(swf->compressed == 8) {
1283       l -= 8;
1284     }
1285
1286     fileSize = l+len;
1287     if(len) {// don't touch headers without tags
1288         swf->fileSize = fileSize;
1289         swf->frameCount = frameCount;
1290     }
1291
1292     if(swf->compressed != 8) {
1293     /* compressed flag set to 8 means "skip first 8
1294        header bytes". This is necessary if the caller wants to
1295        create compressed SWFs himself .
1296        It also means that we don't initialize our own zlib
1297        writer, but assume the caller provided one.
1298      */
1299       if(swf->compressed) {
1300         char*id = "CWS";
1301         writer->write(writer, id, 3);
1302       }
1303       else {
1304         char*id = "FWS";
1305         writer->write(writer, id, 3);
1306       }
1307
1308       writer->write(writer, &swf->fileVersion, 1);
1309       PUT32(b4, swf->fileSize);
1310       writer->write(writer, b4, 4);
1311
1312       if(swf->compressed) {
1313         writer_init_zlibdeflate(&zwriter, writer);
1314         writer = &zwriter;
1315       }
1316     }
1317
1318     swf_SetRect(&t1,&swf->movieSize);
1319     swf_SetU16(&t1,swf->frameRate);
1320     swf_SetU16(&t1,swf->frameCount);
1321
1322     ret = writer->write(writer,b,swf_GetTagLen(&t1));
1323     if (ret!=swf_GetTagLen(&t1))
1324     {
1325       #ifdef DEBUG_RFXSWF
1326         fprintf(stderr, "ret:%d\n",ret);
1327         perror("write:");
1328         fprintf(stderr,"WriteSWF() failed: Header.\n");
1329       #endif
1330       return -1;
1331     }
1332
1333     t = swf->firstTag;
1334     while (t)
1335     { if (swf_WriteTag2(writer, t)<0) return -1;
1336       t = swf_NextTag(t);
1337     }
1338     if(swf->compressed) {
1339       if(swf->compressed != 8) {
1340         zwriter.finish(&zwriter);
1341         return writer->pos - writer_lastpos;
1342       }
1343       return (int)fileSize;
1344     } else {
1345       return (int)fileSize;
1346     }
1347   }
1348 }
1349
1350 int  swf_WriteSWF(int handle, SWF * swf)     // Writes SWF to file, returns length or <0 if fails
1351 {
1352   struct writer_t writer;
1353   int len = 0;
1354   swf->compressed = 0;
1355
1356   if(handle<0) {
1357     writer_init_nullwriter(&writer);
1358     len = swf_WriteSWF2(&writer, swf);
1359   }
1360   writer_init_filewriter(&writer, handle);
1361   len = swf_WriteSWF2(&writer, swf);
1362   writer.finish(&writer);
1363   return len;
1364 }
1365
1366 int  swf_WriteSWC(int handle, SWF * swf)     // Writes SWF to file, returns length or <0 if fails
1367 {
1368   struct writer_t writer;
1369   int len = 0;
1370   swf->compressed = 1;
1371
1372   if(handle<0) {
1373     writer_init_nullwriter(&writer);
1374     len = swf_WriteSWF2(&writer, swf);
1375   }
1376   writer_init_filewriter(&writer, handle);
1377   len = swf_WriteSWF2(&writer, swf);
1378   writer.finish(&writer);
1379   return len;
1380 }
1381
1382 int swf_WriteHeader2(struct writer_t*writer,SWF * swf)
1383 {
1384   SWF myswf;
1385   memcpy(&myswf,swf,sizeof(SWF));
1386   myswf.firstTag = 0;
1387   return swf_WriteSWF2(writer, &myswf);
1388 }
1389
1390 int swf_WriteHeader(int handle,SWF * swf)
1391 {
1392   SWF myswf;
1393   memcpy(&myswf,swf,sizeof(SWF));
1394   myswf.firstTag = 0;
1395   return swf_WriteSWF(handle, &myswf);
1396 }
1397
1398 int swf_WriteCGI(SWF * swf)
1399 { int len;
1400   char s[1024];
1401
1402   len = swf_WriteSWF(-1,swf);
1403
1404   if (len<0) return -1;
1405
1406   sprintf(s,"Content-type: application/x-shockwave-flash\n"
1407             "Accept-Ranges: bytes\n"
1408             "Content-Length: %lu\n"
1409             "Expires: Thu, 13 Apr 2000 23:59:59 GMT\n"
1410             "\n",len);
1411
1412   write(fileno(stdout),s,strlen(s));
1413   return swf_WriteSWF(fileno(stdout),swf);
1414 }
1415
1416 void swf_FreeTags(SWF * swf)                 // Frees all malloc'ed memory for tags
1417 { TAG * t = swf->firstTag;
1418
1419   while (t)
1420   { TAG * tnew = t->next;
1421     if (t->data) free(t->data);
1422     free(t);
1423     t = tnew;
1424   }
1425   swf->firstTag = 0;
1426 }
1427
1428 // include advanced functions
1429
1430 #include "modules/swfdump.c"
1431 #include "modules/swfshape.c"
1432 #include "modules/swftext.c"
1433 #include "modules/swffont.c"
1434 #include "modules/swfobject.c"
1435 #include "modules/swfbutton.c"
1436 #include "modules/swftools.c"
1437 #include "modules/swfcgi.c"
1438 #include "modules/swfbits.c"
1439 #include "modules/swfaction.c"
1440 #include "modules/swfsound.c"
1441 #include "modules/swfdraw.c"