sub/font_load.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include "config.h"
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "osdep/io.h"
  26
  27 #include "font_load.h"
  28 #include "mp_msg.h"
  29 #include "libavutil/attributes.h"
  30
  31 raw_file* load_raw(char *name,int verbose){
  32     int bpp;
  33     raw_file* raw=malloc(sizeof(raw_file));
  34     unsigned char head[32];
  35     FILE *f=fopen(name,"rb");
  36     if(!f) goto err_out;                        // can't open
  37     if(fread(head,32,1,f)<1) goto err_out;        // too small
  38     if(memcmp(head,"mhwanh",6)) goto err_out;        // not raw file
  39     raw->w=head[8]*256+head[9];
  40     raw->h=head[10]*256+head[11];
  41     raw->c=head[12]*256+head[13];
  42     if(raw->w == 0) // 2 bytes were not enough for the width... read 4 bytes from the end of the header
  43         raw->w = ((head[28]*0x100 + head[29])*0x100 + head[30])*0x100 + head[31];
  44     if(raw->c>256) goto err_out;                 // too many colors!?
  45     mp_msg(MSGT_OSD, MSGL_DBG2, "RAW: %s  %d x %d, %d colors\n",name,raw->w,raw->h,raw->c);
  46     if(raw->c){
  47         raw->pal=malloc(raw->c*3);
  48         fread(raw->pal,3,raw->c,f);
  49         bpp=1;
  50     } else {
  51         raw->pal=NULL;
  52         bpp=3;
  53     }
  54     raw->bmp=malloc(raw->h*raw->w*bpp);
  55     fread(raw->bmp,raw->h*raw->w*bpp,1,f);
  56     fclose(f);
  57     return raw;
  58
  59 err_out:
  60     if (f)
  61       fclose(f);
  62     free(raw);
  63     return NULL;
  64 }
  65
  66 extern int sub_unicode;
  67
  68 font_desc_t* read_font_desc(const char* fname,float factor,int verbose){
  69 unsigned char sor[1024];
  70 unsigned char sor2[1024];
  71 font_desc_t *desc;
  72 FILE *f = NULL;
  73 char *dn;
  74 char section[64];
  75 int i,j;
  76 int chardb=0;
  77 int fontdb=-1;
  78 int version av_unused;
  79 int first=1;
  80
  81 desc=malloc(sizeof(font_desc_t));if(!desc) goto fail_out;
  82 memset(desc,0,sizeof(font_desc_t));
  83
  84 f=fopen(fname,"rt");if(!f){ mp_msg(MSGT_OSD, MSGL_V, "font: can't open file: %s\n",fname); goto fail_out;}
  85
  86 i = strlen (fname) - 9;
  87 if ((dn = malloc(i+1))){
  88    strncpy (dn, fname, i);
  89    dn[i]='\0';
  90 }
  91
  92 desc->fpath = dn; // search in the same dir as fonts.desc
  93
  94
  95
  96 // set up some defaults, and erase table
  97 desc->charspace=2;
  98 desc->spacewidth=12;
  99 desc->height=0;
 100 for(i=0;i<65536;i++) desc->start[i]=desc->width[i]=desc->font[i]=-1;
 101
 102 section[0]=0;
 103
 104 while(fgets(sor,1020,f)){
 105   unsigned char* p[8];
 106   int pdb=0;
 107   unsigned char *s=sor;
 108   unsigned char *d=sor2;
 109   int ec=' ';
 110   int id=0;
 111   sor[1020]=0;
 112
 113   /* skip files that look like: TTF (0x00, 0x01), PFM (0x00, 0x01), PFB
 114    * (0x80, 0x01), PCF (0x01, 0x66), fon ("MZ"), gzipped (0x1f, 0x8b) */
 115
 116   if (first) {
 117     if (!sor[0] || sor[1] == 1 || (sor[0] == 'M' && sor[1] == 'Z') || (sor[0] == 0x1f && sor[1] == 0x8b) || (sor[0] == 1 && sor[1] == 0x66)) {
 118       mp_msg(MSGT_OSD, MSGL_ERR, "%s doesn't look like a bitmap font description, ignoring.\n", fname);
 119       goto fail_out;
 120     }
 121     first = 0;
 122   }
 123
 124   p[0]=d;++pdb;
 125   while(1){
 126       int c=*s++;
 127       if(c==0 || c==13 || c==10) break;
 128       if(!id){
 129         if(c==39 || c==34){ id=c;continue;} // idezojel
 130         if(c==';' || c=='#') break;
 131         if(c==9) c=' ';
 132         if(c==' '){
 133           if(ec==' ') continue;
 134           *d=0; ++d;
 135           p[pdb]=d;++pdb;
 136           if(pdb>=8) break;
 137           continue;
 138         }
 139       } else {
 140         if(id==c){ id=0;continue;} // idezojel
 141
 142       }
 143       *d=c;d++;
 144       ec=c;
 145   }
 146   if(d==sor2) continue; // skip empty lines
 147   *d=0;
 148
 149 //  printf("params=%d  sor=%s\n",pdb,sor);
 150 //  for(i=0;i<pdb;i++) printf("  param %d = '%s'\n",i,p[i]);
 151
 152   if(pdb==1 && p[0][0]=='['){
 153       int len=strlen(p[0]);
 154       if(len && len<63 && p[0][len-1]==']'){
 155         strcpy(section,p[0]);
 156         mp_msg(MSGT_OSD, MSGL_DBG2, "font: Reading section: %s\n",section);
 157         if(strcmp(section,"[files]")==0){
 158             ++fontdb;
 159             if(fontdb>=16){ mp_msg(MSGT_OSD, MSGL_ERR, "font: Too many bitmaps defined.\n");goto fail_out;}
 160         }
 161         continue;
 162       }
 163   }
 164
 165   if(strcmp(section,"[fpath]")==0){
 166       if(pdb==1){
 167           free (desc->fpath); // release previously allocated memory
 168           desc->fpath=strdup(p[0]);
 169           continue;
 170       }
 171   } else
 172
 173 #ifdef __AMIGAOS4__
 174 #define FONT_PATH_SEP ""
 175 #else
 176 //! path seperator for font paths, may not be more than one character
 177 #define FONT_PATH_SEP "/"
 178 #endif
 179
 180   if(strcmp(section,"[files]")==0){
 181       char *default_dir=MPLAYER_DATADIR FONT_PATH_SEP "font";
 182       if(pdb==2 && strcmp(p[0],"alpha")==0){
 183           char *cp;
 184           if (!(cp=malloc(strlen(desc->fpath)+strlen(p[1])+2))) goto fail_out;
 185
 186           snprintf(cp,strlen(desc->fpath)+strlen(p[1])+2,"%s" FONT_PATH_SEP "%s",
 187                 desc->fpath,p[1]);
 188           if(!((desc->pic_a[fontdb]=load_raw(cp,verbose)))){
 189                 free(cp);
 190                 if (!(cp=malloc(strlen(default_dir)+strlen(p[1])+2)))
 191                    goto fail_out;
 192                 snprintf(cp,strlen(default_dir)+strlen(p[1])+2,"%s" FONT_PATH_SEP "%s",
 193                          default_dir,p[1]);
 194                 if (!((desc->pic_a[fontdb]=load_raw(cp,verbose)))){
 195                    mp_msg(MSGT_OSD, MSGL_ERR, "Can't load font bitmap: %s\n",p[1]);
 196                    free(cp);
 197                    goto fail_out;
 198                 }
 199           }
 200           free(cp);
 201           continue;
 202       }
 203       if(pdb==2 && strcmp(p[0],"bitmap")==0){
 204           char *cp;
 205           if (!(cp=malloc(strlen(desc->fpath)+strlen(p[1])+2))) goto fail_out;
 206
 207           snprintf(cp,strlen(desc->fpath)+strlen(p[1])+2,"%s" FONT_PATH_SEP "%s",
 208                 desc->fpath,p[1]);
 209           if(!((desc->pic_b[fontdb]=load_raw(cp,verbose)))){
 210                 free(cp);
 211                 if (!(cp=malloc(strlen(default_dir)+strlen(p[1])+2)))
 212                    goto fail_out;
 213                 snprintf(cp,strlen(default_dir)+strlen(p[1])+2,"%s" FONT_PATH_SEP "%s",
 214                          default_dir,p[1]);
 215                 if (!((desc->pic_b[fontdb]=load_raw(cp,verbose)))){
 216                    mp_msg(MSGT_OSD, MSGL_ERR, "Can't load font bitmap: %s\n",p[1]);
 217                    free(cp);
 218                    goto fail_out;
 219                 }
 220           }
 221           free(cp);
 222           continue;
 223       }
 224   } else
 225
 226   if(strcmp(section,"[info]")==0){
 227       if(pdb==2 && strcmp(p[0],"name")==0){
 228           desc->name=strdup(p[1]);
 229           continue;
 230       }
 231       if(pdb==2 && strcmp(p[0],"descversion")==0){
 232           version=atoi(p[1]);
 233           continue;
 234       }
 235       if(pdb==2 && strcmp(p[0],"spacewidth")==0){
 236           desc->spacewidth=atoi(p[1]);
 237           continue;
 238       }
 239       if(pdb==2 && strcmp(p[0],"charspace")==0){
 240           desc->charspace=atoi(p[1]);
 241           continue;
 242       }
 243       if(pdb==2 && strcmp(p[0],"height")==0){
 244           desc->height=atoi(p[1]);
 245           continue;
 246       }
 247   } else
 248
 249   if(strcmp(section,"[characters]")==0){
 250       if(pdb==3){
 251           int chr=p[0][0];
 252           int start=atoi(p[1]);
 253           int end=atoi(p[2]);
 254           if(sub_unicode && (chr>=0x80)) chr=(chr<<8)+p[0][1];
 255           else if(strlen(p[0])!=1) chr=strtol(p[0],NULL,0);
 256           if(end<start) {
 257               mp_msg(MSGT_OSD, MSGL_WARN, "error in font desc: end<start for char '%c'\n",chr);
 258           } else {
 259               desc->start[chr]=start;
 260               desc->width[chr]=end-start+1;
 261               desc->font[chr]=fontdb;
 262 //              printf("char %d '%c'  start=%d width=%d\n",chr,chr,desc->start[chr],desc->width[chr]);
 263               ++chardb;
 264           }
 265           continue;
 266       }
 267   }
 268   mp_msg(MSGT_OSD, MSGL_ERR, "Syntax error in font desc: %s",sor);
 269   goto fail_out;
 270
 271 }
 272 fclose(f);
 273 f = NULL;
 274
 275  if (first == 1) {
 276    mp_msg(MSGT_OSD, MSGL_ERR, "%s is empty or a directory, ignoring.\n", fname);
 277    goto fail_out;
 278  }
 279
 280 //printf("font: pos of U = %d\n",desc->start[218]);
 281
 282 for(i=0;i<=fontdb;i++){
 283     if(!desc->pic_a[i] || !desc->pic_b[i]){
 284         mp_msg(MSGT_OSD, MSGL_ERR, "font: Missing bitmap(s) for sub-font #%d\n",i);
 285         goto fail_out;
 286     }
 287     //if(factor!=1.0f)
 288     {
 289         // re-sample alpha
 290         int f=factor*256.0f;
 291         int size=desc->pic_a[i]->w*desc->pic_a[i]->h;
 292         int j;
 293         mp_msg(MSGT_OSD, MSGL_DBG2, "font: resampling alpha by factor %5.3f (%d) ",factor,f);fflush(stdout);
 294         for(j=0;j<size;j++){
 295             int x=desc->pic_a[i]->bmp[j];       // alpha
 296             int y=desc->pic_b[i]->bmp[j];       // bitmap
 297
 298 #ifdef FAST_OSD
 299             x=(x<(255-f))?0:1;
 300 #else
 301
 302             x=255-((x*f)>>8); // scale
 303             //if(x<0) x=0; else if(x>255) x=255;
 304             //x^=255; // invert
 305
 306             if(x+y>255) x=255-y; // to avoid overflows
 307
 308             //x=0;
 309             //x=((x*f*(255-y))>>16);
 310             //x=((x*f*(255-y))>>16)+y;
 311             //x=(x*f)>>8;if(x<y) x=y;
 312
 313             if(x<1) x=1; else
 314             if(x>=252) x=0;
 315 #endif
 316
 317             desc->pic_a[i]->bmp[j]=x;
 318 //            desc->pic_b[i]->bmp[j]=0; // hack
 319         }
 320         mp_msg(MSGT_OSD, MSGL_DBG2, "DONE!\n");
 321     }
 322     if(!desc->height) desc->height=desc->pic_a[i]->h;
 323 }
 324
 325 j='_';if(desc->font[j]<0) j='?';
 326 for(i=0;i<65536;i++)
 327   if(desc->font[i]<0){
 328       desc->start[i]=desc->start[j];
 329       desc->width[i]=desc->width[j];
 330       desc->font[i]=desc->font[j];
 331   }
 332 desc->font[' ']=-1;
 333 desc->width[' ']=desc->spacewidth;
 334
 335 mp_msg(MSGT_OSD, MSGL_V, "Bitmap font %s loaded successfully! (%d chars)\n",fname,chardb);
 336
 337 return desc;
 338
 339 fail_out:
 340   if (f)
 341     fclose(f);
 342   free(desc->fpath);
 343   free(desc->name);
 344   free(desc);
 345   return NULL;
 346 }
 347
 348 #ifndef CONFIG_FREETYPE
 349 void render_one_glyph(font_desc_t *desc, int c) {}
 350 int kerning(font_desc_t *desc, int prevc, int c) { return 0; }
 351 #endif