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 void swf_SetS16(TAG * t,int v)
 183 {
 184     if(v>32767 || v<-32768) {
 185         fprintf(stderr, "Warning: S16 overflow: %d\n", v);
 186     }
 187     swf_SetU16(t, (S16)v);
 188 }
 189
 190 int swf_SetU32(TAG * t,U32 v)
 191 { U8 a[4];
 192   a[0] = v&0xff;        // to ensure correct handling of non-intel byteorder
 193   a[1] = (v>>8)&0xff;
 194   a[2] = (v>>16)&0xff;
 195   a[3] = (v>>24)&0xff;
 196
 197   swf_ResetWriteBits(t);
 198   if ((t->len+4)>t->memsize) return (swf_SetBlock(t,a,4)==4)?0:-1;
 199   t->data[t->len++] = a[0];
 200   t->data[t->len++] = a[1];
 201   t->data[t->len++] = a[2];
 202   t->data[t->len++] = a[3];
 203   return 0;
 204 }
 205
 206 U32 swf_GetBits(TAG * t,int nbits)
 207 { U32 res = 0;
 208   if (!nbits) return 0;
 209   if (!t->readBit) t->readBit = 0x80;
 210   while (nbits)
 211   { res<<=1;
 212     if (t->data[t->pos]&t->readBit) res|=1;
 213     t->readBit>>=1;
 214     nbits--;
 215     if (!t->readBit)
 216     { if (nbits) t->readBit = 0x80;
 217       #ifdef DEBUG_RFXSWF
 218       if (t->pos>=t->len)
 219       { fprintf(stderr,"GetBits() out of bounds: TagID = %i\n",t->id);
 220         return res;
 221       }
 222       #endif
 223       t->pos++;
 224     }
 225   }
 226   return res;
 227 }
 228
 229 S32 swf_GetSBits(TAG * t,int nbits)
 230 { U32 res = swf_GetBits(t,nbits);
 231   if (res&(1<<(nbits-1))) res|=(0xffffffff<<nbits);
 232   return (S32)res;
 233 }
 234
 235 U32 reader_GetBits(struct reader_t*reader, int nbits)
 236 { return reader_readbits(reader, nbits);
 237 }
 238 S32 reader_GetSBits(struct reader_t*reader, int nbits)
 239 { U32 res = reader_readbits(reader, nbits);
 240   if (res&(1<<(nbits-1))) res|=(0xffffffff<<nbits);
 241   return (S32)res;
 242 }
 243
 244 int swf_SetBits(TAG * t,U32 v,int nbits)
 245 { U32 bm = 1<<(nbits-1);
 246
 247   while (nbits)
 248   { if (!t->writeBit)
 249     { if (FAILED(swf_SetU8(t,0))) return -1;
 250       t->writeBit = 0x80;
 251     }
 252     if (v&bm) t->data[t->len-1] |= t->writeBit;
 253     bm>>=1;
 254     t->writeBit>>=1;
 255     nbits--;
 256   }
 257   return 0;
 258 }
 259
 260 // Advanced Data Access Functions
 261
 262 int swf_SetRGB(TAG * t,RGBA * col)
 263 { if (!t) return -1;
 264   if (col)
 265   { swf_SetU8(t,col->r);
 266     swf_SetU8(t,col->g);
 267     swf_SetU8(t,col->b);
 268   } else swf_SetBlock(t,NULL,3);
 269   return 0;
 270 }
 271 void swf_GetRGB(TAG * t, RGBA * col)
 272 {
 273     RGBA dummy;
 274     if(!col)
 275         col = &dummy;
 276     col->r = swf_GetU8(t);
 277     col->g = swf_GetU8(t);
 278     col->b = swf_GetU8(t);
 279     col->a = 255;
 280 }
 281
 282 int swf_SetRGBA(TAG * t,RGBA * col)
 283 { if (!t) return -1;
 284   if (col)
 285   { swf_SetU8(t,col->r);
 286     swf_SetU8(t,col->g);
 287     swf_SetU8(t,col->b);
 288     swf_SetU8(t,col->a);
 289   } else swf_SetBlock(t,NULL,4);
 290   return 0;
 291 }
 292 void swf_GetRGBA(TAG * t, RGBA * col)
 293 {
 294     RGBA dummy;
 295     if(!col)
 296         col = &dummy;
 297     col->r = swf_GetU8(t);
 298     col->g = swf_GetU8(t);
 299     col->b = swf_GetU8(t);
 300     col->a = swf_GetU8(t);
 301 }
 302
 303 void swf_GetGradient(TAG * tag, GRADIENT * gradient, char alpha)
 304 {
 305     GRADIENT dummy;
 306     int t;
 307     if(!tag) {
 308       memset(gradient, 0, sizeof(GRADIENT));
 309       return;
 310     }
 311     if(!gradient)
 312         gradient = &dummy;
 313     gradient->num = swf_GetU8(tag);
 314     for(t=0;t<gradient->num;t++)
 315     {
 316         int s=t;
 317         if(s>=8) //FIXME
 318             s=7;
 319         gradient->ratios[t] = swf_GetU8(tag);
 320         if(!alpha)
 321             swf_GetRGB(tag, &gradient->rgba[t]);
 322         else
 323             swf_GetRGBA(tag, &gradient->rgba[t]);
 324     }
 325 }
 326
 327 void swf_SetGradient(TAG * tag, GRADIENT * gradient, char alpha)
 328 {
 329     int t;
 330     if(!tag) {
 331       memset(gradient, 0, sizeof(GRADIENT));
 332       return;
 333     }
 334     swf_SetU8(tag, gradient->num);
 335     for(t=0; t<8 && t<gradient->num; t++)
 336     {
 337         swf_SetU8(tag, gradient->ratios[t]);
 338         if(!alpha)
 339             swf_SetRGB(tag, &gradient->rgba[t]);
 340         else
 341             swf_SetRGBA(tag, &gradient->rgba[t]);
 342     }
 343 }
 344
 345 int swf_CountUBits(U32 v,int nbits)
 346 { int n = 32;
 347   U32 m = 0x80000000;
 348   if(v == 0x00000000) n = 0;
 349   else
 350     while (!(v&m))
 351     { n--;
 352       m>>=1;
 353     }
 354   return (n>nbits)?n:nbits;
 355 }
 356
 357 int swf_CountBits(U32 v,int nbits)
 358 { int n = 33;
 359   U32 m = 0x80000000;
 360   if (v&m)
 361   { if(v == 0xffffffff) n = 1;
 362     else
 363     while (v&m)
 364     { n--;
 365       m>>=1;
 366     }
 367   }
 368   else
 369   { if(v == 0x00000000) n = 0;
 370     else
 371     while (!(v&m))
 372     { n--;
 373       m>>=1;
 374     }
 375   }
 376   return (n>nbits)?n:nbits;
 377 }
 378
 379 int swf_GetRect(TAG * t,SRECT * r)
 380 { int nbits;
 381   SRECT dummy;
 382   if(!t) {r->xmin=r->xmax=r->ymin=r->ymax=0;return 0;}
 383   if (!r) r = &dummy;
 384   nbits = (int) swf_GetBits(t,5);
 385   r->xmin = swf_GetSBits(t,nbits);
 386   r->xmax = swf_GetSBits(t,nbits);
 387   r->ymin = swf_GetSBits(t,nbits);
 388   r->ymax = swf_GetSBits(t,nbits);
 389   return 0;
 390 }
 391
 392 int reader_GetRect(struct reader_t*reader,SRECT * r)
 393 { int nbits;
 394   SRECT dummy;
 395   if (!r) r = &dummy;
 396   nbits = (int) reader_GetBits(reader,5);
 397   r->xmin = reader_GetSBits(reader,nbits);
 398   r->xmax = reader_GetSBits(reader,nbits);
 399   r->ymin = reader_GetSBits(reader,nbits);
 400   r->ymax = reader_GetSBits(reader,nbits);
 401   return 0;
 402 }
 403
 404 int swf_SetRect(TAG * t,SRECT * r)
 405 { int nbits;
 406
 407   nbits = swf_CountBits(r->xmin,0);
 408   nbits = swf_CountBits(r->xmax,nbits);
 409   nbits = swf_CountBits(r->ymin,nbits);
 410   nbits = swf_CountBits(r->ymax,nbits);
 411   if(nbits>=32) {
 412     fprintf(stderr, "rfxswf: Warning: num_bits overflow in swf_SetRect\n");
 413     nbits=31;
 414   }
 415
 416   swf_SetBits(t,nbits,5);
 417   swf_SetBits(t,r->xmin,nbits);
 418   swf_SetBits(t,r->xmax,nbits);
 419   swf_SetBits(t,r->ymin,nbits);
 420   swf_SetBits(t,r->ymax,nbits);
 421
 422   return 0;
 423 }
 424
 425 void swf_ExpandRect(SRECT*src, SPOINT add)
 426 {
 427     if((src->xmin | src->ymin | src->xmax | src->ymax)==0) {
 428         src->xmin = add.x;
 429         src->ymin = add.y;
 430         src->xmax = add.x;
 431         src->ymax = add.y;
 432         if((add.x|add.y) == 0) src->xmax++; //make sure the bbox is not NULL anymore
 433         return;
 434     }
 435     if(add.x < src->xmin)
 436         src->xmin = add.x;
 437     if(add.x > src->xmax)
 438         src->xmax = add.x;
 439     if(add.y < src->ymin)
 440         src->ymin = add.y;
 441     if(add.y > src->ymax)
 442         src->ymax = add.y;
 443 }
 444 void swf_ExpandRect2(SRECT*src, SRECT*add)
 445 {
 446     if((add->xmin | add->ymin | add->xmax | add->ymax)==0)
 447         return;
 448     if((src->xmin | src->ymin | src->xmax | src->ymax)==0)
 449         *src = *add;
 450     if(add->xmin < src->xmin)
 451         src->xmin = add->xmin;
 452     if(add->ymin < src->ymin)
 453         src->ymin = add->ymin;
 454     if(add->xmax > src->xmax)
 455         src->xmax = add->xmax;
 456     if(add->ymax > src->ymax)
 457         src->ymax = add->ymax;
 458 }
 459 void swf_ExpandRect3(SRECT*src, SPOINT center, int radius)
 460 {
 461     if((src->xmin | src->ymin | src->xmax | src->ymax)==0) {
 462         src->xmin = center.x-radius;
 463         src->ymin = center.y-radius;
 464         src->xmax = center.x+radius;
 465         src->ymax = center.y+radius;
 466         if((center.x|center.y|radius) == 0) src->xmax++; //make sure the bbox is not NULL anymore
 467         return;
 468     }
 469     if(center.x - radius < src->xmin)
 470         src->xmin = center.x - radius;
 471     if(center.x + radius > src->xmax)
 472         src->xmax = center.x - radius;
 473     if(center.y - radius < src->ymin)
 474         src->ymin = center.y - radius;
 475     if(center.y + radius > src->ymax)
 476         src->ymax = center.y - radius;
 477 }
 478 SPOINT swf_TurnPoint(SPOINT p, MATRIX* m)
 479 {
 480     SPOINT r;
 481     r.x = (int)(m->sx*(1/65536.0)*p.x + m->r1*(1/65536.0)*p.y + 0.5) + m->tx;
 482     r.y = (int)(m->r0*(1/65536.0)*p.x + m->sy*(1/65536.0)*p.y + 0.5) + m->ty;
 483     return r;
 484 }
 485 SRECT swf_TurnRect(SRECT r, MATRIX* m)
 486 {
 487     SRECT g;
 488     SPOINT p1,p2,p3,p4,pp1,pp2,pp3,pp4;
 489     p1.x = r.xmin;p1.y = r.ymin;
 490     p2.x = r.xmax;p2.y = r.ymin;
 491     p3.x = r.xmin;p3.y = r.ymax;
 492     p4.x = r.xmax;p4.y = r.ymax;
 493     pp1 = swf_TurnPoint(p1, m);
 494     pp2 = swf_TurnPoint(p2, m);
 495     pp3 = swf_TurnPoint(p3, m);
 496     pp4 = swf_TurnPoint(p4, m);
 497     g.xmin = g.xmax = pp1.x;
 498     g.ymin = g.ymax = pp1.y;
 499     swf_ExpandRect(&g, pp2);
 500     swf_ExpandRect(&g, pp3);
 501     swf_ExpandRect(&g, pp4);
 502     return g;
 503 }
 504
 505
 506 int swf_GetMatrix(TAG * t,MATRIX * m)
 507 { MATRIX dummy;
 508   int nbits;
 509
 510   if (!m) m = &dummy;
 511
 512   if (!t)
 513   { m->sx = m->sy = 0x10000;
 514     m->r0 = m->r1 = 0;
 515     m->tx = m->ty = 0;
 516     return -1;
 517   }
 518
 519   swf_ResetReadBits(t);
 520
 521   if (swf_GetBits(t,1))
 522   { nbits = swf_GetBits(t,5);
 523     m->sx = swf_GetSBits(t,nbits);
 524     m->sy = swf_GetSBits(t,nbits);
 525   }
 526   else m->sx = m->sy = 0x10000;
 527
 528   if (swf_GetBits(t,1))
 529   { nbits = swf_GetBits(t,5);
 530     m->r0 = swf_GetSBits(t,nbits);
 531     m->r1 = swf_GetSBits(t,nbits);
 532   }
 533   else m->r0 = m->r1 = 0x0;
 534
 535   nbits = swf_GetBits(t,5);
 536   m->tx = swf_GetSBits(t,nbits);
 537   m->ty = swf_GetSBits(t,nbits);
 538
 539   return 0;
 540 }
 541
 542 int swf_SetMatrix(TAG * t,MATRIX * m)
 543 { int nbits;
 544   MATRIX ma;
 545
 546   if (!m)
 547   { m = &ma;
 548     ma.sx = ma.sy = 0x10000;
 549     ma.r0 = ma.r1 = 0;
 550     ma.tx = ma.ty = 0;
 551   }
 552
 553   swf_ResetWriteBits(t);
 554
 555   if ((m->sx==0x10000)&&(m->sy==0x10000)) swf_SetBits(t,0,1);
 556   else
 557   { swf_SetBits(t,1,1);
 558     nbits = swf_CountBits(m->sx,0);
 559     nbits = swf_CountBits(m->sy,nbits);
 560     if(nbits>=32) {
 561         fprintf(stderr,"rfxswf: Error: matrix values too large\n");
 562         nbits = 31;
 563     }
 564     swf_SetBits(t,nbits,5);
 565     swf_SetBits(t,m->sx,nbits);
 566     swf_SetBits(t,m->sy,nbits);
 567   }
 568
 569   if ((!m->r0)&&(!m->r1)) swf_SetBits(t,0,1);
 570   else
 571   { swf_SetBits(t,1,1);
 572     nbits = swf_CountBits(m->r0,0);
 573     nbits = swf_CountBits(m->r1,nbits);
 574     if(nbits>=32) {
 575         fprintf(stderr,"rfxswf: Error: matrix values too large\n");
 576         nbits = 31;
 577     }
 578     swf_SetBits(t,nbits,5);
 579     swf_SetBits(t,m->r0,nbits);
 580     swf_SetBits(t,m->r1,nbits);
 581   }
 582
 583   nbits = swf_CountBits(m->tx,0);
 584   nbits = swf_CountBits(m->ty,nbits);
 585   if(nbits>=32) {
 586       fprintf(stderr,"rfxswf: Error: matrix values too large\n");
 587       nbits = 31;
 588   }
 589   swf_SetBits(t,nbits,5);
 590   swf_SetBits(t,m->tx,nbits);
 591   swf_SetBits(t,m->ty,nbits);
 592
 593   return 0;
 594 }
 595
 596 int swf_GetCXForm(TAG * t,CXFORM * cx,U8 alpha) //FIXME: alpha should be type bool
 597 { CXFORM cxf;
 598   int hasadd;
 599   int hasmul;
 600   int nbits;
 601
 602   if (!cx) cx = &cxf;
 603
 604   cx->a0 = cx->r0 = cx->g0 = cx->b0 = 256;
 605   cx->a1 = cx->r1 = cx->g1 = cx->b1 = 0;
 606
 607   if (!t) return 0;
 608
 609   swf_ResetReadBits(t);
 610   hasadd = swf_GetBits(t,1);
 611   hasmul = swf_GetBits(t,1);
 612   nbits  = swf_GetBits(t,4);
 613
 614   if (hasmul)
 615   { cx->r0 = (S16)swf_GetSBits(t,nbits);
 616     cx->g0 = (S16)swf_GetSBits(t,nbits);
 617     cx->b0 = (S16)swf_GetSBits(t,nbits);
 618     if (alpha)
 619       cx->a0 = (S16)swf_GetSBits(t,nbits);
 620   }
 621
 622   if (hasadd)
 623   { cx->r1 = (S16)swf_GetSBits(t,nbits);
 624     cx->g1 = (S16)swf_GetSBits(t,nbits);
 625     cx->b1 = (S16)swf_GetSBits(t,nbits);
 626     if (alpha)
 627       cx->a1 = (S16)swf_GetSBits(t,nbits);
 628   }
 629
 630   return 0;
 631 }
 632
 633 int swf_SetCXForm(TAG * t,CXFORM * cx,U8 alpha)
 634 { CXFORM cxf;
 635   int hasadd;
 636   int hasmul;
 637   int nbits;
 638
 639   if (!cx)
 640   { cx = &cxf;
 641     cx->a0 = cx->r0 = cx->g0 = cx->b0 = 256;
 642     cx->a1 = cx->r1 = cx->g1 = cx->b1 = 0;
 643   }
 644
 645   if (!alpha)
 646   { cx->a0 = 256;
 647     cx->a1 = 0;
 648   }
 649
 650   nbits = 0;
 651
 652   hasmul = (cx->a0!=256)||(cx->r0!=256)||(cx->g0!=256)||(cx->b0!=256);
 653   hasadd = cx->a1|cx->r1|cx->g1|cx->b1;
 654
 655   if (hasmul)
 656   { if (alpha) nbits = swf_CountBits((S32)cx->a0,nbits);
 657     nbits = swf_CountBits((S32)cx->r0,nbits);
 658     nbits = swf_CountBits((S32)cx->g0,nbits);
 659     nbits = swf_CountBits((S32)cx->b0,nbits);
 660   }
 661
 662   if (hasadd)
 663   { if (alpha) nbits = swf_CountBits((S32)cx->a1,nbits);
 664     nbits = swf_CountBits((S32)cx->r1,nbits);
 665     nbits = swf_CountBits((S32)cx->g1,nbits);
 666     nbits = swf_CountBits((S32)cx->b1,nbits);
 667   }
 668
 669   swf_ResetWriteBits(t);
 670   swf_SetBits(t,hasadd?1:0,1);
 671   swf_SetBits(t,hasmul?1:0,1);
 672   swf_SetBits(t,nbits,4);
 673
 674   if (hasmul)
 675   { swf_SetBits(t,cx->r0,nbits);
 676     swf_SetBits(t,cx->g0,nbits);
 677     swf_SetBits(t,cx->b0,nbits);
 678     if (alpha) swf_SetBits(t,cx->a0,nbits);
 679   }
 680
 681   if (hasadd)
 682   { swf_SetBits(t,cx->r1,nbits);
 683     swf_SetBits(t,cx->g1,nbits);
 684     swf_SetBits(t,cx->b1,nbits);
 685     if (alpha) swf_SetBits(t,cx->a1,nbits);
 686   }
 687
 688   return 0;
 689 }
 690
 691 //int swf_GetPoint(TAG * t,SPOINT * p) { return 0; }
 692 //int swf_SetPoint(TAG * t,SPOINT * p) { return 0; }
 693
 694 void  swf_SetPassword(TAG * t, const char * password)
 695 {
 696     /* WARNING: crypt_md5 is not reentrant */
 697     char salt[3];
 698     char* md5string;
 699
 700 #if defined(HAVE_LRAND48) && defined(HAVE_SRAND48) && defined(HAVE_TIME_H) && defined(HAVE_TIME)
 701     srand48(time(0));
 702     salt[0] = "abcdefghijklmnopqrstuvwxyz0123456789"[lrand48()%36];
 703     salt[1] = "abcdefghijklmnopqrstuvwxyz0123456789"[lrand48()%36];
 704 #else
 705     salt[0] = 'l';
 706     salt[1] = '8';
 707     fprintf(stderr, "rfxswf: Warning- no usable random generator found\n");
 708     fprintf(stderr, "Your password will be vulnerable to dictionary attacks\n");
 709 #endif
 710
 711     md5string = crypt_md5(password, salt);
 712
 713     swf_SetU16(t,0);
 714     swf_SetString(t, md5string);
 715 }
 716
 717 int swf_VerifyPassword(TAG * t, const char * password)
 718 {
 719     char*md5string1, *md5string2;
 720     char*x;
 721     char*md5, *salt;
 722     int n;
 723
 724     if(t->len >= 5 && t->pos==0 &&
 725        t->data[0] == 0 &&
 726        t->data[1] == 0) {
 727       swf_GetU16(t);
 728     } else {
 729       printf("%d %d %d %d\n", t->len, t->pos, t->data[0], t->data[1]);
 730     }
 731
 732     md5string1 = swf_GetString(t);
 733
 734     if(strncmp(md5string1, "$1$",3 )) {
 735         fprintf(stderr, "rfxswf: no salt in pw string\n");
 736         return 0;
 737     }
 738     x = strchr(md5string1+3, '$');
 739     if(!x) {
 740         fprintf(stderr, "rfxswf: invalid salt format in pw string\n");
 741         return 0;
 742     }
 743     n = x-(md5string1+3);
 744     salt = (char*)malloc(n+1);
 745     memcpy(salt, md5string1+3, n);
 746     salt[n] = 0;
 747
 748     md5string2 = crypt_md5(password, salt);
 749     free(salt);
 750     if(strcmp(md5string1, md5string2) != 0)
 751         return 0;
 752     return 1;
 753 }
 754
 755 // Tag List Manipulating Functions
 756
 757 TAG * swf_InsertTag(TAG * after,U16 id)
 758 { TAG * t;
 759
 760   t = (TAG *)malloc(sizeof(TAG));
 761   if (t)
 762   { memset(t,0x00,sizeof(TAG));
 763     t->id = id;
 764
 765     if (after)
 766     {
 767       t->prev  = after;
 768       t->next  = after->next;
 769       after->next = t;
 770       if (t->next) t->next->prev = t;
 771     }
 772   }
 773   return t;
 774 }
 775
 776 TAG * swf_InsertTagBefore(SWF* swf, TAG * before,U16 id)
 777 { TAG * t;
 778
 779   t = (TAG *)malloc(sizeof(TAG));
 780   if (t)
 781   { memset(t,0x00,sizeof(TAG));
 782     t->id = id;
 783
 784     if (before)
 785     {
 786       t->next  = before;
 787       t->prev  = before->prev;
 788       before->prev = t;
 789       if (t->prev) t->prev->next = t;
 790     }
 791   }
 792   if(swf && swf->firstTag == before) {
 793     swf->firstTag = t;
 794   }
 795   return t;
 796 }
 797
 798 void swf_ClearTag(TAG * t)
 799 {
 800   if (t->data) free(t->data);
 801   t->data = 0;
 802   t->pos = 0;
 803   t->len = 0;
 804   t->readBit = 0;
 805   t->writeBit = 0;
 806   t->memsize = 0;
 807 }
 808
 809 void swf_ResetTag(TAG*tag, U16 id)
 810 {
 811     tag->len = tag->pos = tag->readBit = tag->writeBit = 0;
 812     tag->id = id;
 813 }
 814
 815 int swf_DeleteTag(TAG * t)
 816 { if (!t) return -1;
 817
 818   if (t->prev) t->prev->next = t->next;
 819   if (t->next) t->next->prev = t->prev;
 820
 821   if (t->data) free(t->data);
 822   free(t);
 823   return 0;
 824 }
 825
 826 TAG * swf_ReadTag(struct reader_t*reader, TAG * prev)
 827 { TAG * t;
 828   U16 raw;
 829   U32 len;
 830   int id;
 831
 832   if (reader->read(reader, &raw, 2) !=2 ) return NULL;
 833   raw = SWAP16(raw);
 834
 835   len = raw&0x3f;
 836   id  = raw>>6;
 837
 838   if (len==0x3f)
 839   {
 840       if (reader->read(reader, &len, 4) != 4) return NULL;
 841       len = SWAP32(len);
 842   }
 843
 844   if (id==ST_DEFINESPRITE) len = 2*sizeof(U16);
 845   // Sprite handling fix: Flatten sprite tree
 846
 847   t = (TAG *)malloc(sizeof(TAG));
 848
 849   if (!t)
 850   {
 851     #ifdef DEBUG_RFXSWF
 852       fprintf(stderr,"Fatal Error: malloc()/realloc() failed (2). (%d bytes)\n", sizeof(TAG));
 853     #endif
 854     return NULL;
 855   }
 856
 857   memset(t,0x00,sizeof(TAG));
 858
 859   t->len = len;
 860   t->id  = id;
 861
 862   if (t->len)
 863   { t->data = (U8*)malloc(t->len);
 864     if (!t->data)
 865     {
 866       #ifdef DEBUG_RFXSWF
 867         fprintf(stderr,"Fatal Error: malloc()/realloc() failed (3). (%d bytes)\n", t->len);
 868       #endif
 869       return NULL;
 870     }
 871     t->memsize = t->len;
 872     if (reader->read(reader, t->data, t->len) != t->len) return NULL;
 873   }
 874
 875   if (prev)
 876   {
 877     t->prev  = prev;
 878     prev->next = t;
 879   }
 880
 881   return t;
 882 }
 883
 884 int swf_DefineSprite_GetRealSize(TAG * t);
 885
 886 int swf_WriteTag2(struct writer_t*writer, TAG * t)
 887 // returns tag length in bytes (incl. Header), -1 = Error
 888 // writer = 0 -> no output
 889 { U16 raw[3];
 890   U32 len;
 891   int short_tag;
 892
 893   if (!t) return -1;
 894
 895   len = (t->id==ST_DEFINESPRITE)?swf_DefineSprite_GetRealSize(t):t->len;
 896
 897   short_tag = len<0x3f&&(t->id!=ST_DEFINEBITSLOSSLESS&&t->id!=ST_DEFINEBITSLOSSLESS2);
 898
 899   if (writer)
 900   { if (short_tag)
 901     { raw[0] = SWAP16(len|((t->id&0x3ff)<<6));
 902       if (writer->write(writer,raw,2)!=2)
 903       {
 904         #ifdef DEBUG_RFXSWF
 905           fprintf(stderr,"WriteTag() failed: Short Header.\n");
 906         #endif
 907         return -1;
 908       }
 909     }
 910     else
 911     {
 912       raw[0] = SWAP16((t->id<<6)|0x3f);
 913       if (writer->write(writer,raw,2)!=2)
 914       {
 915 #ifdef DEBUG_RFXSWF
 916           fprintf(stderr,"WriteTag() failed: Long Header (1).\n");
 917 #endif
 918           return -1;
 919       }
 920
 921       len = SWAP32(len);
 922       if (writer->write(writer,&len,4)!=4)
 923       {
 924         #ifdef DEBUG_RFXSWF
 925           fprintf(stderr,"WriteTag() failed: Long Header (2).\n");
 926         #endif
 927         return -1;
 928       }
 929     }
 930
 931     if (t->data)
 932     { if (writer->write(writer,t->data,t->len)!=t->len)
 933       {
 934         #ifdef DEBUG_RFXSWF
 935           fprintf(stderr,"WriteTag() failed: Data.\n");
 936         #endif
 937         return -1;
 938       }
 939     }
 940     #ifdef DEBUG_RFXSWF
 941       else if (t->len) fprintf(stderr,"WriteTag(): Tag Data Error, id=%i\n",t->id);
 942     #endif
 943   }
 944
 945   return t->len+(short_tag?2:6);
 946 }
 947
 948 int swf_WriteTag(int handle, TAG * t)
 949 {
 950   struct writer_t writer;
 951   int len = 0;
 952   if(handle<0)
 953     return swf_WriteTag2(0, t);
 954   writer_init_filewriter(&writer, handle);
 955   len = swf_WriteTag2(&writer, t);
 956   writer.finish(&writer);
 957   return len;
 958 }
 959
 960 int swf_DefineSprite_GetRealSize(TAG * t)
 961 // Sprite Handling: Helper function to pack DefineSprite-Tag
 962 { U32 len = t->len;
 963   if(len>4) { // folded sprite
 964       return t->len;
 965   }
 966   do
 967   { t = swf_NextTag(t);
 968     if (t && t->id!=ST_DEFINESPRITE) len += swf_WriteTag(-1, t);
 969     else t = NULL;
 970   } while (t&&(t->id!=ST_END));
 971   return len;
 972 }
 973
 974 void swf_UnFoldSprite(TAG * t)
 975 {
 976   U16 id,tmp;
 977   U32 len;
 978   TAG*next = t;
 979   U16 spriteid,spriteframes;
 980   int level;
 981   if(t->id!=ST_DEFINESPRITE)
 982     return;
 983   if(t->len<=4) // not folded
 984     return;
 985
 986   swf_SetTagPos(t,0);
 987
 988   spriteid = swf_GetU16(t); //id
 989   spriteframes = swf_GetU16(t); //frames
 990
 991   level = 1;
 992
 993   while(1)
 994   {
 995     TAG*it = 0;
 996     tmp = swf_GetU16(t);
 997     len = tmp&0x3f;
 998     id  = tmp>>6;
 999     if(id == ST_END)
1000         level--;
1001     if(id == ST_DEFINESPRITE && len<=4)
1002         level++;
1003
1004     if (len==0x3f)
1005         len = swf_GetU32(t);
1006     it = swf_InsertTag(next, id);
1007     next = it;
1008     it->len = len;
1009     it->id  = id;
1010     if (it->len)
1011     { it->data = (U8*)malloc(it->len);
1012       it->memsize = it->len;
1013       swf_GetBlock(t, it->data, it->len);
1014     }
1015
1016     if(!level)
1017         break;
1018   }
1019
1020   free(t->data); t->data = 0;
1021   t->memsize = t->len = t->pos = 0;
1022
1023   swf_SetU16(t, spriteid);
1024   swf_SetU16(t, spriteframes);
1025 }
1026
1027 void swf_FoldSprite(TAG * t)
1028 {
1029   TAG*sprtag=t,*tmp;
1030   U16 id,frames,tmpid;
1031   int level;
1032   if(t->id!=ST_DEFINESPRITE)
1033       return;
1034   if(!t->len) {
1035       fprintf(stderr, "Error: Sprite has no ID!");
1036       return;
1037   }
1038   if(t->len>4) {
1039     /* sprite is already folded */
1040       return;
1041   }
1042
1043   t->pos = 0;
1044   id = swf_GetU16(t);
1045   free(t->data);
1046   t->len = t->pos = t->memsize = 0;
1047   t->data = 0;
1048
1049   frames = 0;
1050
1051   t = swf_NextTag(sprtag);
1052   level = 1;
1053
1054   do
1055   {
1056     if(t->id==ST_SHOWFRAME) frames++;
1057     if(t->id == ST_DEFINESPRITE && t->len<=4)
1058         level++;
1059     if(t->id == ST_END)
1060         level--;
1061     t = swf_NextTag(t);
1062   } while(t && level);
1063   if(level)
1064     fprintf(stderr, "rfxswf error: sprite doesn't end(1)\n");
1065
1066   swf_SetU16(sprtag, id);
1067   swf_SetU16(sprtag, frames);
1068
1069   t = swf_NextTag(sprtag);
1070   level = 1;
1071
1072   do
1073   {
1074     if(t->len<0x3f&&t->id!=ST_DEFINEBITSLOSSLESS&&t->id!=ST_DEFINEBITSLOSSLESS2) {
1075         swf_SetU16(sprtag,t->len|(t->id<<6));
1076     } else {
1077         swf_SetU16(sprtag,0x3f|(t->id<<6));
1078         swf_SetU32(sprtag,t->len);
1079     }
1080     if(t->len)
1081         swf_SetBlock(sprtag,t->data, t->len);
1082     tmp = t;
1083     if(t->id == ST_DEFINESPRITE && t->len<=4)
1084         level++;
1085     if(t->id == ST_END)
1086         level--;
1087     t = swf_NextTag(t);
1088     swf_DeleteTag(tmp);
1089   }
1090   while (t && level);
1091   if(level)
1092     fprintf(stderr, "rfxswf error: sprite doesn't end(2)\n");
1093
1094 //  sprtag->next = t;
1095 //  t->prev = sprtag;
1096 }
1097
1098 int swf_IsFolded(TAG * t)
1099 {
1100     return (t->id == ST_DEFINESPRITE && t->len>4);
1101 }
1102
1103 void swf_FoldAll(SWF*swf)
1104 {
1105     TAG*tag = swf->firstTag;
1106     //swf_DumpSWF(stdout, swf);
1107     while(tag) {
1108         if(tag->id == ST_DEFINESPRITE) {
1109             swf_FoldSprite(tag);
1110             //swf_DumpSWF(stdout, swf);
1111         }
1112         tag = swf_NextTag(tag);
1113     }
1114 }
1115
1116 void swf_UnFoldAll(SWF*swf)
1117 {
1118     TAG*tag = swf->firstTag;
1119     while(tag) {
1120         if(tag->id == ST_DEFINESPRITE)
1121             swf_UnFoldSprite(tag);
1122         tag = tag->next;
1123     }
1124 }
1125
1126 void swf_OptimizeTagOrder(SWF*swf)
1127 {
1128   TAG*tag,*next;
1129   TAG*level0;
1130   int level;
1131   int changes;
1132   swf_UnFoldAll(swf);
1133   /* at the moment, we don't actually do optimizing,
1134      only fixing of non-spec-conformant things like
1135      sprite tags */
1136
1137   do {
1138     changes = 0;
1139     level = 0;
1140     level0 = 0;
1141     tag = swf->firstTag;
1142     while(tag) {
1143       next = tag->next;
1144       if(tag->id == ST_DEFINESPRITE) {
1145         if(tag->len>4) {
1146           /* ??? all sprites are supposed to be unfolded */
1147           fprintf(stderr, "librfxswf error - internal error in OptimizeTagOrder/UnfoldAll\n");
1148         }
1149         level++;
1150         if(level==1) {
1151           level0 = tag;
1152           tag = next;
1153           continue;
1154         }
1155       }
1156       if(level>=1) {
1157         /* move non-sprite tags out of sprite */
1158         if(!swf_isAllowedSpriteTag(tag) || level>=2) {
1159           /* remove tag from current position */
1160           tag->prev->next = tag->next;
1161           if(tag->next)
1162             tag->next->prev = tag->prev;
1163
1164           /* insert before tag level0 */
1165           tag->next = level0;
1166           tag->prev = level0->prev;
1167           level0->prev = tag;
1168           tag->prev->next = tag;
1169           changes = 1;
1170         }
1171       }
1172       if(tag->id == ST_END) {
1173         level--;
1174       }
1175
1176       tag = next;
1177     }
1178   } while(changes);
1179 }
1180
1181 // Movie Functions
1182
1183 int swf_ReadSWF2(struct reader_t*reader, SWF * swf)   // Reads SWF to memory (malloc'ed), returns length or <0 if fails
1184 {
1185   if (!swf) return -1;
1186   memset(swf,0x00,sizeof(SWF));
1187
1188   { char b[32];                         // read Header
1189     int len;
1190     TAG * t;
1191     TAG t1;
1192     struct reader_t zreader;
1193
1194     if ((len = reader->read(reader ,b,8))<8) return -1;
1195
1196     if (b[0]!='F' && b[0]!='C') return -1;
1197     if (b[1]!='W') return -1;
1198     if (b[2]!='S') return -1;
1199     swf->fileVersion = b[3];
1200     swf->compressed  = (b[0]=='C')?1:0;
1201     swf->fileSize    = GET32(&b[4]);
1202
1203     if(swf->compressed) {
1204         reader_init_zlibinflate(&zreader, reader);
1205         reader = &zreader;
1206     }
1207
1208     reader_GetRect(reader, &swf->movieSize);
1209     reader->read(reader, &swf->frameRate, 2);
1210     swf->frameRate = SWAP16(swf->frameRate);
1211     reader->read(reader, &swf->frameCount, 2);
1212     swf->frameCount = SWAP16(swf->frameCount);
1213
1214     /* read tags and connect to list */
1215     t = &t1;
1216     while (t) t = swf_ReadTag(reader,t);
1217     swf->firstTag = t1.next;
1218     t1.next->prev = NULL;
1219   }
1220
1221   return reader->pos;
1222 }
1223
1224 int swf_ReadSWF(int handle, SWF * swf)
1225 {
1226   struct reader_t reader;
1227   reader_init_filereader(&reader, handle);
1228   return swf_ReadSWF2(&reader, swf);
1229 }
1230
1231 int  swf_WriteSWF2(struct writer_t*writer, SWF * swf)     // Writes SWF to file, returns length or <0 if fails
1232 { U32 len;
1233   TAG * t;
1234   int frameCount=0;
1235   struct writer_t zwriter;
1236   int fileSize = 0;
1237   int inSprite = 0;
1238   int writer_lastpos = 0;
1239   int ret;
1240
1241   if (!swf) return -1;
1242   if (!writer) return -1; // the caller should provide a nullwriter, not 0, for querying SWF size
1243
1244   if(writer) writer_lastpos = writer->pos;
1245
1246   // Insert REFLEX Tag
1247
1248 #ifdef INSERT_RFX_TAG
1249
1250   if (swf->firstTag && swf_NextTag(swf->firstTag))
1251     if (swf_GetTagID(swf_NextTag(swf->firstTag))!=ST_REFLEX)
1252       swf_SetBlock(swf_InsertTagBefore(swf, swf->firstTag,ST_REFLEX),"rfx",3);
1253
1254 #endif // INSERT_RFX_TAG
1255
1256   // Count Frames + File Size
1257
1258   len = 0;
1259   t = swf->firstTag;
1260   frameCount = 0;
1261
1262   while(t) {
1263       len += swf_WriteTag(-1,t);
1264       if(t->id == ST_DEFINESPRITE && !swf_IsFolded(t)) inSprite++;
1265       else if(t->id == ST_END && inSprite) inSprite--;
1266       else if(t->id == ST_SHOWFRAME && !inSprite) frameCount++;
1267       t = swf_NextTag(t);
1268   }
1269
1270   { TAG t1;
1271     char b[64],b4[4];
1272     U32 l;
1273
1274     memset(&t1,0x00,sizeof(TAG));
1275     t1.data    = (U8*)b;
1276     t1.memsize = 64;
1277
1278     { // measure header file size
1279       TAG t2;
1280       char b2[64];
1281       memset(&t2,0x00,sizeof(TAG));
1282       t2.data    = (U8*)b2;
1283       t2.memsize = 64;
1284       swf_SetRect(&t2, &swf->movieSize);
1285       swf_SetU16(&t2, swf->frameRate);
1286       swf_SetU16(&t2, swf->frameCount);
1287       l = swf_GetTagLen(&t2)+8;
1288     }
1289     if(swf->compressed == 8) {
1290       l -= 8;
1291     }
1292
1293     fileSize = l+len;
1294     if(len) {// don't touch headers without tags
1295         swf->fileSize = fileSize;
1296         swf->frameCount = frameCount;
1297     }
1298
1299     if(swf->compressed != 8) {
1300     /* compressed flag set to 8 means "skip first 8
1301        header bytes". This is necessary if the caller wants to
1302        create compressed SWFs himself .
1303        It also means that we don't initialize our own zlib
1304        writer, but assume the caller provided one.
1305      */
1306       if(swf->compressed) {
1307         char*id = "CWS";
1308         writer->write(writer, id, 3);
1309       }
1310       else {
1311         char*id = "FWS";
1312         writer->write(writer, id, 3);
1313       }
1314
1315       writer->write(writer, &swf->fileVersion, 1);
1316       PUT32(b4, swf->fileSize);
1317       writer->write(writer, b4, 4);
1318
1319       if(swf->compressed) {
1320         writer_init_zlibdeflate(&zwriter, writer);
1321         writer = &zwriter;
1322       }
1323     }
1324
1325     swf_SetRect(&t1,&swf->movieSize);
1326     swf_SetU16(&t1,swf->frameRate);
1327     swf_SetU16(&t1,swf->frameCount);
1328
1329     ret = writer->write(writer,b,swf_GetTagLen(&t1));
1330     if (ret!=swf_GetTagLen(&t1))
1331     {
1332       #ifdef DEBUG_RFXSWF
1333         fprintf(stderr, "ret:%d\n",ret);
1334         perror("write:");
1335         fprintf(stderr,"WriteSWF() failed: Header.\n");
1336       #endif
1337       return -1;
1338     }
1339
1340     t = swf->firstTag;
1341     while (t)
1342     { if (swf_WriteTag2(writer, t)<0) return -1;
1343       t = swf_NextTag(t);
1344     }
1345     if(swf->compressed) {
1346       if(swf->compressed != 8) {
1347         zwriter.finish(&zwriter);
1348         return writer->pos - writer_lastpos;
1349       }
1350       return (int)fileSize;
1351     } else {
1352       return (int)fileSize;
1353     }
1354   }
1355 }
1356
1357 int  swf_WriteSWF(int handle, SWF * swf)     // Writes SWF to file, returns length or <0 if fails
1358 {
1359   struct writer_t writer;
1360   int len = 0;
1361   swf->compressed = 0;
1362
1363   if(handle<0) {
1364     writer_init_nullwriter(&writer);
1365     len = swf_WriteSWF2(&writer, swf);
1366   }
1367   writer_init_filewriter(&writer, handle);
1368   len = swf_WriteSWF2(&writer, swf);
1369   writer.finish(&writer);
1370   return len;
1371 }
1372
1373 int  swf_WriteSWC(int handle, SWF * swf)     // Writes SWF to file, returns length or <0 if fails
1374 {
1375   struct writer_t writer;
1376   int len = 0;
1377   swf->compressed = 1;
1378
1379   if(handle<0) {
1380     writer_init_nullwriter(&writer);
1381     len = swf_WriteSWF2(&writer, swf);
1382   }
1383   writer_init_filewriter(&writer, handle);
1384   len = swf_WriteSWF2(&writer, swf);
1385   writer.finish(&writer);
1386   return len;
1387 }
1388
1389 int swf_WriteHeader2(struct writer_t*writer,SWF * swf)
1390 {
1391   SWF myswf;
1392   memcpy(&myswf,swf,sizeof(SWF));
1393   myswf.firstTag = 0;
1394   return swf_WriteSWF2(writer, &myswf);
1395 }
1396
1397 int swf_WriteHeader(int handle,SWF * swf)
1398 {
1399   SWF myswf;
1400   memcpy(&myswf,swf,sizeof(SWF));
1401   myswf.firstTag = 0;
1402   return swf_WriteSWF(handle, &myswf);
1403 }
1404
1405 int swf_WriteCGI(SWF * swf)
1406 { int len;
1407   char s[1024];
1408
1409   len = swf_WriteSWF(-1,swf);
1410
1411   if (len<0) return -1;
1412
1413   sprintf(s,"Content-type: application/x-shockwave-flash\n"
1414             "Accept-Ranges: bytes\n"
1415             "Content-Length: %lu\n"
1416             "Expires: Thu, 13 Apr 2000 23:59:59 GMT\n"
1417             "\n",len);
1418
1419   write(fileno(stdout),s,strlen(s));
1420   return swf_WriteSWF(fileno(stdout),swf);
1421 }
1422
1423 void swf_FreeTags(SWF * swf)                 // Frees all malloc'ed memory for tags
1424 { TAG * t = swf->firstTag;
1425
1426   while (t)
1427   { TAG * tnew = t->next;
1428     if (t->data) free(t->data);
1429     free(t);
1430     t = tnew;
1431   }
1432   swf->firstTag = 0;
1433 }
1434
1435 // include advanced functions
1436
1437 #include "modules/swfdump.c"
1438 #include "modules/swfshape.c"
1439 #include "modules/swftext.c"
1440 #include "modules/swffont.c"
1441 #include "modules/swfobject.c"
1442 #include "modules/swfbutton.c"
1443 #include "modules/swftools.c"
1444 #include "modules/swfcgi.c"
1445 #include "modules/swfbits.c"
1446 #include "modules/swfaction.c"
1447 #include "modules/swfsound.c"
1448 #include "modules/swfdraw.c"