libvo/font_load_ft.c

   1 /*
   2  * Renders antialiased fonts for mplayer using freetype library.
   3  * Should work with TrueType, Type1 and any other font supported by libfreetype.
   4  *
   5  * Artur Zaprzala <zybi@fanthom.irc.pl>
   6  *
   7  * ported inside MPlayer by Jindrich Makovicka <makovick@gmail.com>
   8  *
   9  * This file is part of MPlayer.
  10  *
  11  * MPlayer is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * MPlayer is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License along
  22  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  23  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  24  */
  25
  26 #include "config.h"
  27
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <math.h>
  31 #include <string.h>
  32
  33 #ifdef CONFIG_ICONV
  34 #include <iconv.h>
  35 #endif
  36
  37 #include <ft2build.h>
  38 #include FT_FREETYPE_H
  39 #include FT_GLYPH_H
  40
  41 #ifdef CONFIG_FONTCONFIG
  42 #include <fontconfig/fontconfig.h>
  43 #endif
  44
  45 #include "libavutil/common.h"
  46 #include "mpbswap.h"
  47 #include "font_load.h"
  48 #include "mp_msg.h"
  49 #include "help_mp.h"
  50 #include "mplayer.h"
  51 #include "get_path.h"
  52 #include "osd_font.h"
  53
  54 #if (FREETYPE_MAJOR > 2) || (FREETYPE_MAJOR == 2 && FREETYPE_MINOR >= 1)
  55 #define HAVE_FREETYPE21
  56 #endif
  57
  58 char *subtitle_font_encoding = NULL;
  59 float text_font_scale_factor = 3.5;
  60 float osd_font_scale_factor = 4.0;
  61 float subtitle_font_radius = 2.0;
  62 float subtitle_font_thickness = 2.0;
  63 // 0 = no autoscale
  64 // 1 = video height
  65 // 2 = video width
  66 // 3 = diagonal
  67 int subtitle_autoscale = 3;
  68
  69 int vo_image_width = 0;
  70 int vo_image_height = 0;
  71 int force_load_font;
  72
  73 int using_freetype = 0;
  74 int font_fontconfig = 1;
  75
  76 //// constants
  77 static unsigned int const colors = 256;
  78 static unsigned int const maxcolor = 255;
  79 static unsigned const   base = 256;
  80 static unsigned const first_char = 33;
  81 #define MAX_CHARSET_SIZE 60000
  82
  83 static FT_Library library;
  84
  85 #define OSD_CHARSET_SIZE 15
  86
  87 static FT_ULong osd_charset[OSD_CHARSET_SIZE] =
  88 {
  89     0xe001, 0xe002, 0xe003, 0xe004, 0xe005, 0xe006, 0xe007, 0xe008,
  90     0xe009, 0xe00a, 0xe00b, 0xe010, 0xe011, 0xe012, 0xe013
  91 };
  92
  93 static FT_ULong osd_charcodes[OSD_CHARSET_SIZE] =
  94 {
  95     0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,
  96     0x09,0x0a,0x0b,0x10,0x11,0x12,0x13
  97 };
  98
  99 #define f266ToInt(x)            (((x)+32)>>6)   // round fractional fixed point number to integer
 100                                                 // coordinates are in 26.6 pixels (i.e. 1/64th of pixels)
 101 #define f266CeilToInt(x)        (((x)+63)>>6)   // ceiling
 102 #define f266FloorToInt(x)       ((x)>>6)        // floor
 103 #define f1616ToInt(x)           (((x)+0x8000)>>16)      // 16.16
 104 #define floatTof266(x)          ((int)((x)*(1<<6)+0.5))
 105
 106 #define ALIGN(x)                (((x)+7)&~7)    // 8 byte align
 107
 108 #define WARNING(msg, args...)      mp_msg(MSGT_OSD, MSGL_WARN, msg "\n", ## args)
 109
 110 #define DEBUG 0
 111
 112 //static double ttime;
 113
 114
 115 static void paste_bitmap(unsigned char *bbuffer, FT_Bitmap *bitmap, int x, int y, int width, int height, int bwidth) {
 116     int drow = x+y*width;
 117     int srow = 0;
 118     int sp, dp, w, h;
 119     if (bitmap->pixel_mode==ft_pixel_mode_mono)
 120         for (h = bitmap->rows; h>0 && height > 0; --h, height--, drow+=width, srow+=bitmap->pitch)
 121             for (w = bwidth, sp=dp=0; w>0; --w, ++dp, ++sp)
 122                     bbuffer[drow+dp] = (bitmap->buffer[srow+sp/8] & (0x80>>(sp%8))) ? 255:0;
 123     else
 124         for (h = bitmap->rows; h>0 && height > 0; --h, height--, drow+=width, srow+=bitmap->pitch)
 125             for (w = bwidth, sp=dp=0; w>0; --w, ++dp, ++sp)
 126                     bbuffer[drow+dp] = bitmap->buffer[srow+sp];
 127 }
 128
 129
 130 static int check_font(font_desc_t *desc, float ppem, int padding, int pic_idx,
 131                       int charset_size, FT_ULong *charset, FT_ULong *charcodes,
 132                       int unicode) {
 133     FT_Error    error;
 134     FT_Face face = desc->faces[pic_idx];
 135     int const   load_flags = FT_LOAD_DEFAULT;
 136     int         ymin = INT_MAX, ymax = INT_MIN;
 137     int         space_advance = 20;
 138     int         width, height;
 139     unsigned char *bbuffer;
 140     int i, uni_charmap = 1;
 141
 142     error = FT_Select_Charmap(face, ft_encoding_unicode);
 143 //    fprintf(stderr, "select unicode charmap: %d\n", error);
 144
 145     if (face->charmap==NULL || face->charmap->encoding!=ft_encoding_unicode) {
 146         WARNING("Unicode charmap not available for this font. Very bad!");
 147         uni_charmap = 0;
 148         error = FT_Set_Charmap(face, face->charmaps[0]);
 149         if (error) WARNING("No charmaps! Strange.");
 150     }
 151
 152     /* set size */
 153     if (FT_IS_SCALABLE(face)) {
 154         error = FT_Set_Char_Size(face, 0, floatTof266(ppem), 0, 0);
 155         if (error) WARNING("FT_Set_Char_Size failed.");
 156     } else {
 157         int j = 0;
 158         int jppem = face->available_sizes[0].height;
 159         /* find closest size */
 160         for (i = 0; i<face->num_fixed_sizes; ++i) {
 161             if (fabs(face->available_sizes[i].height - ppem) < abs(face->available_sizes[i].height - jppem)) {
 162                 j = i;
 163                 jppem = face->available_sizes[i].height;
 164             }
 165         }
 166         WARNING("Selected font is not scalable. Using ppem=%i.", face->available_sizes[j].height);
 167         error = FT_Set_Pixel_Sizes(face, face->available_sizes[j].width, face->available_sizes[j].height);
 168         if (error) WARNING("FT_Set_Pixel_Sizes failed.");
 169     }
 170
 171     if (FT_IS_FIXED_WIDTH(face))
 172         WARNING("Selected font is fixed-width.");
 173
 174     /* compute space advance */
 175     error = FT_Load_Char(face, ' ', load_flags);
 176     if (error) WARNING("spacewidth set to default.");
 177     else space_advance = f266ToInt(face->glyph->advance.x);
 178
 179     if (!desc->spacewidth) desc->spacewidth = 2*padding + space_advance;
 180     if (!desc->charspace) desc->charspace = -2*padding;
 181     if (!desc->height) desc->height = f266ToInt(face->size->metrics.height);
 182
 183
 184     for (i= 0; i<charset_size; ++i) {
 185         FT_ULong        character, code;
 186         FT_UInt         glyph_index;
 187
 188         character = charset[i];
 189         code = charcodes[i];
 190         desc->font[unicode?character:code] = pic_idx;
 191         // get glyph index
 192         if (character==0)
 193             glyph_index = 0;
 194         else {
 195             glyph_index = FT_Get_Char_Index(face, uni_charmap ? character:code);
 196             if (glyph_index==0) {
 197                 WARNING("Glyph for char 0x%02lx|U+%04lX|%c not found.", code, character,
 198                         code<' '||code>255 ? '.':(char)code);
 199                 desc->font[unicode?character:code] = -1;
 200                 continue;
 201             }
 202         }
 203         desc->glyph_index[unicode?character:code] = glyph_index;
 204     }
 205 //    fprintf(stderr, "font height: %lf\n", (double)(face->bbox.yMax-face->bbox.yMin)/(double)face->units_per_EM*ppem);
 206 //    fprintf(stderr, "font width: %lf\n", (double)(face->bbox.xMax-face->bbox.xMin)/(double)face->units_per_EM*ppem);
 207
 208     ymax = (double)(face->bbox.yMax)/(double)face->units_per_EM*ppem+1;
 209     ymin = (double)(face->bbox.yMin)/(double)face->units_per_EM*ppem-1;
 210
 211     width = ppem*(face->bbox.xMax-face->bbox.xMin)/face->units_per_EM+3+2*padding;
 212     if (desc->max_width < width) desc->max_width = width;
 213     width = ALIGN(width);
 214     desc->pic_b[pic_idx]->charwidth = width;
 215
 216     if (width <= 0) {
 217         mp_msg(MSGT_OSD, MSGL_ERR, "Wrong bounding box, width <= 0 !\n");
 218         return -1;
 219     }
 220
 221     if (ymax<=ymin) {
 222         mp_msg(MSGT_OSD, MSGL_ERR, "Something went wrong. Use the source!\n");
 223         return -1;
 224     }
 225
 226     height = ymax - ymin + 2*padding;
 227     if (height <= 0) {
 228         mp_msg(MSGT_OSD, MSGL_ERR, "Wrong bounding box, height <= 0 !\n");
 229         return -1;
 230     }
 231
 232     if (desc->max_height < height) desc->max_height = height;
 233     desc->pic_b[pic_idx]->charheight = height;
 234
 235 //    fprintf(stderr, "font height2: %d\n", height);
 236     desc->pic_b[pic_idx]->baseline = ymax + padding;
 237     desc->pic_b[pic_idx]->padding = padding;
 238     desc->pic_b[pic_idx]->current_alloc = 0;
 239     desc->pic_b[pic_idx]->current_count = 0;
 240
 241     bbuffer = NULL;
 242
 243     desc->pic_b[pic_idx]->w = width;
 244     desc->pic_b[pic_idx]->h = height;
 245     desc->pic_b[pic_idx]->c = colors;
 246     desc->pic_b[pic_idx]->bmp = bbuffer;
 247     desc->pic_b[pic_idx]->pen = 0;
 248     return 0;
 249 }
 250
 251 // general outline
 252 static void outline(
 253         unsigned char *s,
 254         unsigned char *t,
 255         int width,
 256         int height,
 257         int stride,
 258         unsigned char *m,
 259         int r,
 260         int mwidth,
 261         int msize) {
 262
 263     int x, y;
 264
 265     for (y = 0; y<height; y++) {
 266         for (x = 0; x<width; x++) {
 267             const int src= s[x];
 268             if(src==0) continue;
 269             {
 270                 const int x1=(x<r) ? r-x : 0;
 271                 const int y1=(y<r) ? r-y : 0;
 272                 const int x2=(x+r>=width ) ? r+width -x : 2*r+1;
 273                 const int y2=(y+r>=height) ? r+height-y : 2*r+1;
 274                 register unsigned char *dstp= t + (y1+y-r)* stride + x-r;
 275                 //register int *mp  = m +  y1     *mwidth;
 276                 register unsigned char *mp= m + msize*src + y1*mwidth;
 277                 int my;
 278
 279                 for(my= y1; my<y2; my++){
 280                     register int mx;
 281                     for(mx= x1; mx<x2; mx++){
 282                         if(dstp[mx] < mp[mx]) dstp[mx]= mp[mx];
 283                     }
 284                     dstp+=stride;
 285                     mp+=mwidth;
 286                 }
 287             }
 288         }
 289         s+= stride;
 290     }
 291 }
 292
 293
 294 // 1 pixel outline
 295 static void outline1(
 296         unsigned char *s,
 297         unsigned char *t,
 298         int width,
 299         int height,
 300         int stride) {
 301
 302     int x, y;
 303     int skip = stride-width;
 304
 305     for (x = 0; x<width; ++x, ++s, ++t) *t = *s;
 306     s += skip;
 307     t += skip;
 308     for (y = 1; y<height-1; ++y) {
 309         *t++ = *s++;
 310         for (x = 1; x<width-1; ++x, ++s, ++t) {
 311             unsigned v = (
 312                     s[-1-stride]+
 313                     s[-1+stride]+
 314                     s[+1-stride]+
 315                     s[+1+stride]
 316                 )/2 + (
 317                     s[-1]+
 318                     s[+1]+
 319                     s[-stride]+
 320                     s[+stride]+
 321                     s[0]
 322                 );
 323             *t = v>maxcolor ? maxcolor : v;
 324         }
 325         *t++ = *s++;
 326         s += skip;
 327         t += skip;
 328     }
 329     for (x = 0; x<width; ++x, ++s, ++t) *t = *s;
 330 }
 331
 332 // "0 pixel outline"
 333 static void outline0(
 334         unsigned char *s,
 335         unsigned char *t,
 336         int width,
 337         int height,
 338         int stride) {
 339     int y;
 340     for (y = 0; y<height; ++y) {
 341         memcpy(t, s, width);
 342         s += stride;
 343         t += stride;
 344     }
 345 }
 346
 347 // gaussian blur
 348 void blur(
 349         unsigned char *buffer,
 350         unsigned short *tmp2,
 351         int width,
 352         int height,
 353         int stride,
 354         int *m2,
 355         int r,
 356         int mwidth) {
 357
 358     int x, y;
 359
 360     unsigned char  *s = buffer;
 361     unsigned short *t = tmp2+1;
 362     for(y=0; y<height; y++){
 363         memset(t-1, 0, (width+1)*sizeof(short));
 364
 365         for(x=0; x<r; x++){
 366             const int src= s[x];
 367             if(src){
 368                 register unsigned short *dstp= t + x-r;
 369                 int mx;
 370                 unsigned *m3= m2 + src*mwidth;
 371                 for(mx=r-x; mx<mwidth; mx++){
 372                     dstp[mx]+= m3[mx];
 373                 }
 374             }
 375         }
 376
 377         for(; x<width-r; x++){
 378             const int src= s[x];
 379             if(src){
 380                 register unsigned short *dstp= t + x-r;
 381                 int mx;
 382                 unsigned *m3= m2 + src*mwidth;
 383                 for(mx=0; mx<mwidth; mx++){
 384                     dstp[mx]+= m3[mx];
 385                 }
 386             }
 387         }
 388
 389         for(; x<width; x++){
 390             const int src= s[x];
 391             if(src){
 392                 register unsigned short *dstp= t + x-r;
 393                 int mx;
 394                 const int x2= r+width -x;
 395                 unsigned *m3= m2 + src*mwidth;
 396                 for(mx=0; mx<x2; mx++){
 397                     dstp[mx]+= m3[mx];
 398                 }
 399             }
 400         }
 401
 402         s+= stride;
 403         t+= width + 1;
 404     }
 405
 406     t = tmp2;
 407     for(x=0; x<width; x++){
 408         for(y=0; y<r; y++){
 409             unsigned short *srcp= t + y*(width+1) + 1;
 410             int src= *srcp;
 411             if(src){
 412                 register unsigned short *dstp= srcp - 1 + width+1;
 413                 const int src2= (src + 128)>>8;
 414                 unsigned *m3= m2 + src2*mwidth;
 415
 416                 int mx;
 417                 *srcp= 128;
 418                 for(mx=r-1; mx<mwidth; mx++){
 419                     *dstp += m3[mx];
 420                     dstp+= width+1;
 421                 }
 422             }
 423         }
 424         for(; y<height-r; y++){
 425             unsigned short *srcp= t + y*(width+1) + 1;
 426             int src= *srcp;
 427             if(src){
 428                 register unsigned short *dstp= srcp - 1 - r*(width+1);
 429                 const int src2= (src + 128)>>8;
 430                 unsigned *m3= m2 + src2*mwidth;
 431
 432                 int mx;
 433                 *srcp= 128;
 434                 for(mx=0; mx<mwidth; mx++){
 435                     *dstp += m3[mx];
 436                     dstp+= width+1;
 437                 }
 438             }
 439         }
 440         for(; y<height; y++){
 441             unsigned short *srcp= t + y*(width+1) + 1;
 442             int src= *srcp;
 443             if(src){
 444                 const int y2=r+height-y;
 445                 register unsigned short *dstp= srcp - 1 - r*(width+1);
 446                 const int src2= (src + 128)>>8;
 447                 unsigned *m3= m2 + src2*mwidth;
 448
 449                 int mx;
 450                 *srcp= 128;
 451                 for(mx=0; mx<y2; mx++){
 452                     *dstp += m3[mx];
 453                     dstp+= width+1;
 454                 }
 455             }
 456         }
 457         t++;
 458     }
 459
 460     t = tmp2;
 461     s = buffer;
 462     for(y=0; y<height; y++){
 463         for(x=0; x<width; x++){
 464             s[x]= t[x]>>8;
 465         }
 466         s+= stride;
 467         t+= width + 1;
 468     }
 469 }
 470
 471 static void resample_alpha(unsigned char *abuf, unsigned char *bbuf, int width, int height, int stride, float factor)
 472 {
 473         int f=factor*256.0f;
 474         int i,j;
 475         for (i = 0; i < height; i++) {
 476             unsigned char *a = abuf+i*stride;
 477             unsigned char *b = bbuf+i*stride;
 478             for(j=0;j<width;j++,a++,b++){
 479                 int x=*a;       // alpha
 480                 int y=*b;       // bitmap
 481                 x=255-((x*f)>>8); // scale
 482                 if (x+y>255) x=255-y; // to avoid overflows
 483                 if (x<1) x=1; else if (x>=252) x=0;
 484                 *a=x;
 485             }
 486         }
 487 }
 488
 489 #define ALLOC_INCR 32
 490 void render_one_glyph(font_desc_t *desc, int c)
 491 {
 492     FT_GlyphSlot        slot;
 493     FT_UInt             glyph_index;
 494     FT_BitmapGlyph glyph;
 495     int width, height, stride, maxw, off;
 496     unsigned char *abuffer, *bbuffer;
 497
 498     int const   load_flags = FT_LOAD_DEFAULT;
 499     int         pen_xa;
 500     int font = desc->font[c];
 501     int error;
 502
 503 //    fprintf(stderr, "render_one_glyph %d\n", c);
 504
 505     if (!desc->dynamic) return;
 506     if (desc->width[c] != -1) return;
 507     if (desc->font[c] == -1) return;
 508
 509     glyph_index = desc->glyph_index[c];
 510
 511     // load glyph
 512     error = FT_Load_Glyph(desc->faces[font], glyph_index, load_flags);
 513     if (error) {
 514         WARNING("FT_Load_Glyph 0x%02x (char 0x%04x) failed.", glyph_index, c);
 515         desc->font[c] = -1;
 516         return;
 517     }
 518     slot = desc->faces[font]->glyph;
 519
 520     // render glyph
 521     if (slot->format != ft_glyph_format_bitmap) {
 522         error = FT_Render_Glyph(slot, ft_render_mode_normal);
 523         if (error) {
 524             WARNING("FT_Render_Glyph 0x%04x (char 0x%04x) failed.", glyph_index, c);
 525             desc->font[c] = -1;
 526             return;
 527         }
 528     }
 529
 530     // extract glyph image
 531     error = FT_Get_Glyph(slot, (FT_Glyph*)&glyph);
 532     if (error) {
 533         WARNING("FT_Get_Glyph 0x%04x (char 0x%04x) failed.", glyph_index, c);
 534         desc->font[c] = -1;
 535         return;
 536     }
 537
 538 //    fprintf(stderr, "glyph generated\n");
 539
 540     maxw = desc->pic_b[font]->charwidth;
 541
 542     if (glyph->bitmap.width > maxw) {
 543         fprintf(stderr, "glyph too wide!\n");
 544     }
 545
 546     // allocate new memory, if needed
 547 //    fprintf(stderr, "\n%d %d %d\n", desc->pic_b[font]->charwidth, desc->pic_b[font]->charheight, desc->pic_b[font]->current_alloc);
 548     if (desc->pic_b[font]->current_count >= desc->pic_b[font]->current_alloc) {
 549         int newsize = desc->pic_b[font]->charwidth*desc->pic_b[font]->charheight*(desc->pic_b[font]->current_alloc+ALLOC_INCR);
 550         int increment = desc->pic_b[font]->charwidth*desc->pic_b[font]->charheight*ALLOC_INCR;
 551         desc->pic_b[font]->current_alloc += ALLOC_INCR;
 552
 553 //      fprintf(stderr, "\nns = %d inc = %d\n", newsize, increment);
 554
 555         desc->pic_b[font]->bmp = realloc(desc->pic_b[font]->bmp, newsize);
 556         desc->pic_a[font]->bmp = realloc(desc->pic_a[font]->bmp, newsize);
 557
 558         off = desc->pic_b[font]->current_count*desc->pic_b[font]->charwidth*desc->pic_b[font]->charheight;
 559         memset(desc->pic_b[font]->bmp+off, 0, increment);
 560         memset(desc->pic_a[font]->bmp+off, 0, increment);
 561     }
 562
 563     abuffer = desc->pic_a[font]->bmp;
 564     bbuffer = desc->pic_b[font]->bmp;
 565
 566     off = desc->pic_b[font]->current_count*desc->pic_b[font]->charwidth*desc->pic_b[font]->charheight;
 567
 568     paste_bitmap(bbuffer+off,
 569                  &glyph->bitmap,
 570                  desc->pic_b[font]->padding + glyph->left,
 571                  desc->pic_b[font]->baseline - glyph->top,
 572                  desc->pic_b[font]->charwidth, desc->pic_b[font]->charheight,
 573                  glyph->bitmap.width <= maxw ? glyph->bitmap.width : maxw);
 574
 575 //    fprintf(stderr, "glyph pasted\n");
 576     FT_Done_Glyph((FT_Glyph)glyph);
 577
 578     /* advance pen */
 579     pen_xa = f266ToInt(slot->advance.x) + 2*desc->pic_b[font]->padding;
 580     if (pen_xa > maxw) pen_xa = maxw;
 581
 582     desc->start[c] = off;
 583     width = desc->width[c] = pen_xa;
 584     height = desc->pic_b[font]->charheight;
 585     stride = desc->pic_b[font]->w;
 586
 587     if (desc->tables.o_r == 0) {
 588         outline0(bbuffer+off, abuffer+off, width, height, stride);
 589     } else if (desc->tables.o_r == 1) {
 590         outline1(bbuffer+off, abuffer+off, width, height, stride);
 591     } else {
 592         outline(bbuffer+off, abuffer+off, width, height, stride,
 593                 desc->tables.omt, desc->tables.o_r, desc->tables.o_w,
 594                 desc->tables.o_size);
 595     }
 596 //    fprintf(stderr, "fg: outline t = %lf\n", GetTimer()-t);
 597
 598     if (desc->tables.g_r) {
 599         blur(abuffer+off, desc->tables.tmp, width, height, stride,
 600              desc->tables.gt2, desc->tables.g_r,
 601              desc->tables.g_w);
 602 //      fprintf(stderr, "fg: blur t = %lf\n", GetTimer()-t);
 603     }
 604
 605     resample_alpha(abuffer+off, bbuffer+off, width, height, stride, font_factor);
 606
 607     desc->pic_b[font]->current_count++;
 608 }
 609
 610
 611 static int prepare_font(font_desc_t *desc, FT_Face face, float ppem, int pic_idx,
 612                         int charset_size, FT_ULong *charset, FT_ULong *charcodes, int unicode,
 613                         double thickness, double radius)
 614 {
 615     int i, err;
 616     int padding = ceil(radius) + ceil(thickness);
 617
 618     desc->faces[pic_idx] = face;
 619
 620     desc->pic_a[pic_idx] = malloc(sizeof(raw_file));
 621     if (!desc->pic_a[pic_idx]) return -1;
 622     desc->pic_b[pic_idx] = malloc(sizeof(raw_file));
 623     if (!desc->pic_b[pic_idx]) return -1;
 624
 625     desc->pic_a[pic_idx]->bmp = NULL;
 626     desc->pic_a[pic_idx]->pal = NULL;
 627     desc->pic_b[pic_idx]->bmp = NULL;
 628     desc->pic_b[pic_idx]->pal = NULL;
 629
 630     desc->pic_a[pic_idx]->pal = malloc(sizeof(unsigned char)*256*3);
 631     if (!desc->pic_a[pic_idx]->pal) return -1;
 632     for (i = 0; i<768; ++i) desc->pic_a[pic_idx]->pal[i] = i/3;
 633
 634     desc->pic_b[pic_idx]->pal = malloc(sizeof(unsigned char)*256*3);
 635     if (!desc->pic_b[pic_idx]->pal) return -1;
 636     for (i = 0; i<768; ++i) desc->pic_b[pic_idx]->pal[i] = i/3;
 637
 638 //    ttime = GetTimer();
 639     err = check_font(desc, ppem, padding, pic_idx, charset_size, charset, charcodes, unicode);
 640 //    ttime=GetTimer()-ttime;
 641 //    printf("render:   %7lf us\n",ttime);
 642     if (err) return -1;
 643 //    fprintf(stderr, "fg: render t = %lf\n", GetTimer()-t);
 644
 645     desc->pic_a[pic_idx]->w = desc->pic_b[pic_idx]->w;
 646     desc->pic_a[pic_idx]->h = desc->pic_b[pic_idx]->h;
 647     desc->pic_a[pic_idx]->c = colors;
 648
 649     desc->pic_a[pic_idx]->bmp = NULL;
 650
 651 //    fprintf(stderr, "fg: w = %d, h = %d\n", desc->pic_a[pic_idx]->w, desc->pic_a[pic_idx]->h);
 652     return 0;
 653
 654 }
 655
 656 static int generate_tables(font_desc_t *desc, double thickness, double radius)
 657 {
 658     int width = desc->max_height;
 659     int height = desc->max_width;
 660
 661     double A = log(1.0/base)/(radius*radius*2);
 662     int mx, my, i;
 663     double volume_diff, volume_factor = 0;
 664     unsigned char *omtp;
 665
 666     desc->tables.g_r = ceil(radius);
 667     desc->tables.o_r = ceil(thickness);
 668     desc->tables.g_w = 2*desc->tables.g_r+1;
 669     desc->tables.o_w = 2*desc->tables.o_r+1;
 670     desc->tables.o_size = desc->tables.o_w * desc->tables.o_w;
 671
 672 //    fprintf(stderr, "o_r = %d\n", desc->tables.o_r);
 673
 674     if (desc->tables.g_r) {
 675         desc->tables.g = malloc(desc->tables.g_w * sizeof(unsigned));
 676         desc->tables.gt2 = malloc(256 * desc->tables.g_w * sizeof(unsigned));
 677         if (desc->tables.g==NULL || desc->tables.gt2==NULL) {
 678             return -1;
 679         }
 680     }
 681     desc->tables.om = malloc(desc->tables.o_w*desc->tables.o_w * sizeof(unsigned));
 682     desc->tables.omt = malloc(desc->tables.o_size*256);
 683
 684     omtp = desc->tables.omt;
 685     desc->tables.tmp = malloc((width+1)*height*sizeof(short));
 686
 687     if (desc->tables.om==NULL || desc->tables.omt==NULL || desc->tables.tmp==NULL) {
 688         return -1;
 689     };
 690
 691     if (desc->tables.g_r) {
 692         // gaussian curve with volume = 256
 693         for (volume_diff=10000000; volume_diff>0.0000001; volume_diff*=0.5){
 694             volume_factor+= volume_diff;
 695             desc->tables.volume=0;
 696             for (i = 0; i<desc->tables.g_w; ++i) {
 697                 desc->tables.g[i] = (unsigned)(exp(A * (i-desc->tables.g_r)*(i-desc->tables.g_r)) * volume_factor + .5);
 698                 desc->tables.volume+= desc->tables.g[i];
 699             }
 700             if(desc->tables.volume>256) volume_factor-= volume_diff;
 701         }
 702         desc->tables.volume=0;
 703         for (i = 0; i<desc->tables.g_w; ++i) {
 704             desc->tables.g[i] = (unsigned)(exp(A * (i-desc->tables.g_r)*(i-desc->tables.g_r)) * volume_factor + .5);
 705             desc->tables.volume+= desc->tables.g[i];
 706         }
 707
 708         // gauss table:
 709         for(mx=0;mx<desc->tables.g_w;mx++){
 710             for(i=0;i<256;i++){
 711                 desc->tables.gt2[mx+i*desc->tables.g_w] = i*desc->tables.g[mx];
 712             }
 713         }
 714     }
 715
 716     /* outline matrix */
 717     for (my = 0; my<desc->tables.o_w; ++my) {
 718         for (mx = 0; mx<desc->tables.o_w; ++mx) {
 719             // antialiased circle would be perfect here, but this one is good enough
 720             double d = thickness + 1 - sqrt((mx-desc->tables.o_r)*(mx-desc->tables.o_r)+(my-desc->tables.o_r)*(my-desc->tables.o_r));
 721             desc->tables.om[mx+my*desc->tables.o_w] = d>=1 ? base : d<=0 ? 0 : (d*base + .5);
 722         }
 723     }
 724
 725     // outline table:
 726     for(i=0;i<256;i++){
 727         for(mx=0;mx<desc->tables.o_size;mx++) *(omtp++) = (i*desc->tables.om[mx] + (base/2))/base;
 728     }
 729
 730     return 0;
 731 }
 732
 733 #ifdef CONFIG_ICONV
 734 /* decode from 'encoding' to unicode */
 735 static FT_ULong decode_char(iconv_t *cd, char c) {
 736     FT_ULong o;
 737     char *inbuf = &c;
 738     char *outbuf = (char*)&o;
 739     size_t inbytesleft = 1;
 740     size_t outbytesleft = sizeof(FT_ULong);
 741
 742     iconv(*cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft);
 743
 744     /* convert unicode BigEndian -> MachineEndian */
 745     o = be2me_32(o);
 746
 747     // if (count==-1) o = 0; // not OK, at least my iconv() returns E2BIG for all
 748     if (outbytesleft!=0) o = 0;
 749
 750     /* we don't want control characters */
 751     if (o>=0x7f && o<0xa0) o = 0;
 752     return o;
 753 }
 754
 755 static int prepare_charset(char *charmap, char *encoding, FT_ULong *charset, FT_ULong *charcodes) {
 756     FT_ULong i;
 757     int count = 0;
 758     int charset_size;
 759     iconv_t cd;
 760
 761     // check if ucs-4 is available
 762     cd = iconv_open(charmap, charmap);
 763     if (cd==(iconv_t)-1) {
 764         mp_msg(MSGT_OSD, MSGL_ERR, "iconv doesn't know %s encoding. Use the source!\n", charmap);
 765         return -1;
 766     }
 767
 768     iconv_close(cd);
 769
 770     cd = iconv_open(charmap, encoding);
 771     if (cd==(iconv_t)-1) {
 772         mp_msg(MSGT_OSD, MSGL_ERR, "Unsupported encoding `%s', use iconv --list to list character sets known on your system.\n", encoding);
 773         return -1;
 774     }
 775
 776     charset_size = 256 - first_char;
 777     for (i = 0; i<charset_size; ++i) {
 778         charcodes[count] = i+first_char;
 779         charset[count] = decode_char(&cd, i+first_char);
 780         if (charset[count]!=0) ++count;
 781     }
 782     charcodes[count] = charset[count] = 0; ++count;
 783     charset_size = count;
 784
 785     iconv_close(cd);
 786     if (charset_size==0) {
 787         mp_msg(MSGT_OSD, MSGL_ERR, "No characters to render!\n");
 788         return -1;
 789     }
 790
 791     return charset_size;
 792 }
 793
 794 static int prepare_charset_unicode(FT_Face face, FT_ULong *charset, FT_ULong *charcodes) {
 795 #ifdef HAVE_FREETYPE21
 796     FT_ULong  charcode;
 797 #else
 798     int j;
 799 #endif
 800     FT_UInt   gindex;
 801     int i;
 802
 803     if (face->charmap==NULL || face->charmap->encoding!=ft_encoding_unicode) {
 804         WARNING("Unicode charmap not available for this font. Very bad!");
 805         return -1;
 806     }
 807 #ifdef HAVE_FREETYPE21
 808     i = 0;
 809     charcode = FT_Get_First_Char( face, &gindex );
 810     while (gindex != 0) {
 811         if (charcode < 65536 && charcode >= 33) { // sanity check
 812             charset[i] = charcode;
 813             charcodes[i] = 0;
 814             i++;
 815         }
 816         charcode = FT_Get_Next_Char( face, charcode, &gindex );
 817     }
 818 #else
 819     // for FT < 2.1 we have to use brute force enumeration
 820     i = 0;
 821     for (j = 33; j < 65536; j++) {
 822         gindex = FT_Get_Char_Index(face, j);
 823         if (gindex > 0) {
 824             charset[i] = j;
 825             charcodes[i] = 0;
 826             i++;
 827         }
 828     }
 829 #endif
 830     mp_msg(MSGT_OSD, MSGL_V, "Unicode font: %d glyphs.\n", i);
 831
 832     return i;
 833 }
 834 #endif
 835
 836 static font_desc_t* init_font_desc(void)
 837 {
 838     font_desc_t *desc;
 839     int i;
 840
 841     desc = malloc(sizeof(font_desc_t));
 842     if(!desc) return NULL;
 843     memset(desc,0,sizeof(font_desc_t));
 844
 845     desc->dynamic = 1;
 846
 847     /* setup sane defaults */
 848     desc->name = NULL;
 849     desc->fpath = NULL;
 850
 851     desc->face_cnt = 0;
 852     desc->charspace = 0;
 853     desc->spacewidth = 0;
 854     desc->height = 0;
 855     desc->max_width = 0;
 856     desc->max_height = 0;
 857     desc->freetype = 1;
 858
 859     desc->tables.g = NULL;
 860     desc->tables.gt2 = NULL;
 861     desc->tables.om = NULL;
 862     desc->tables.omt = NULL;
 863     desc->tables.tmp = NULL;
 864
 865     for(i = 0; i < 65536; i++)
 866         desc->start[i] = desc->width[i] = desc->font[i] = -1;
 867     for(i = 0; i < 16; i++)
 868         desc->pic_a[i] = desc->pic_b[i] = NULL;
 869
 870     return desc;
 871 }
 872
 873 void free_font_desc(font_desc_t *desc)
 874 {
 875     int i;
 876
 877     if (!desc) return;
 878
 879 //    if (!desc->dynamic) return; // some vo_aa crap, better leaking than crashing
 880
 881     if (desc->name) free(desc->name);
 882     if (desc->fpath) free(desc->fpath);
 883
 884     for(i = 0; i < 16; i++) {
 885         if (desc->pic_a[i]) {
 886             if (desc->pic_a[i]->bmp) free(desc->pic_a[i]->bmp);
 887             if (desc->pic_a[i]->pal) free(desc->pic_a[i]->pal);
 888             free (desc->pic_a[i]);
 889         }
 890         if (desc->pic_b[i]) {
 891             if (desc->pic_b[i]->bmp) free(desc->pic_b[i]->bmp);
 892             if (desc->pic_b[i]->pal) free(desc->pic_b[i]->pal);
 893             free (desc->pic_b[i]);
 894         }
 895     }
 896
 897     if (desc->tables.g) free(desc->tables.g);
 898     if (desc->tables.gt2) free(desc->tables.gt2);
 899     if (desc->tables.om) free(desc->tables.om);
 900     if (desc->tables.omt) free(desc->tables.omt);
 901     if (desc->tables.tmp) free(desc->tables.tmp);
 902
 903     for(i = 0; i < desc->face_cnt; i++) {
 904         FT_Done_Face(desc->faces[i]);
 905     }
 906
 907     free(desc);
 908 }
 909
 910 static int load_sub_face(const char *name, int face_index, FT_Face *face)
 911 {
 912     int err = -1;
 913
 914     if (name) err = FT_New_Face(library, name, face_index, face);
 915
 916     if (err) {
 917         char *font_file = get_path("subfont.ttf");
 918         err = FT_New_Face(library, font_file, 0, face);
 919         free(font_file);
 920         if (err) {
 921             err = FT_New_Face(library, MPLAYER_DATADIR "/subfont.ttf", 0, face);
 922             if (err) {
 923                 mp_msg(MSGT_OSD, MSGL_ERR, MSGTR_LIBVO_FONT_LOAD_FT_NewFaceFailed);
 924                 return -1;
 925             }
 926         }
 927     }
 928     return err;
 929 }
 930
 931 static int load_osd_face(FT_Face *face)
 932 {
 933     if ( FT_New_Memory_Face(library, osd_font_pfb, sizeof(osd_font_pfb), 0, face) ) {
 934         mp_msg(MSGT_OSD, MSGL_ERR, MSGTR_LIBVO_FONT_LOAD_FT_NewMemoryFaceFailed);
 935         return -1;
 936     }
 937     return 0;
 938 }
 939
 940 int kerning(font_desc_t *desc, int prevc, int c)
 941 {
 942     FT_Vector kern;
 943
 944     if (!desc->dynamic) return 0;
 945     if (prevc < 0 || c < 0) return 0;
 946     if (desc->font[prevc] != desc->font[c]) return 0;
 947     if (desc->font[prevc] == -1 || desc->font[c] == -1) return 0;
 948     FT_Get_Kerning(desc->faces[desc->font[c]],
 949                    desc->glyph_index[prevc], desc->glyph_index[c],
 950                    ft_kerning_default, &kern);
 951
 952 //    fprintf(stderr, "kern: %c %c %d\n", prevc, c, f266ToInt(kern.x));
 953
 954     return f266ToInt(kern.x);
 955 }
 956
 957 font_desc_t* read_font_desc_ft(const char *fname, int face_index, int movie_width, int movie_height, float font_scale_factor)
 958 {
 959     font_desc_t *desc = NULL;
 960
 961     FT_Face face;
 962
 963     FT_ULong *my_charset = malloc(MAX_CHARSET_SIZE * sizeof(FT_ULong)); /* characters we want to render; Unicode */
 964     FT_ULong *my_charcodes = malloc(MAX_CHARSET_SIZE * sizeof(FT_ULong)); /* character codes in 'encoding' */
 965
 966     char *charmap = "ucs-4";
 967     int err;
 968     int charset_size;
 969     int i, j;
 970     int unicode;
 971
 972     float movie_size;
 973
 974     float subtitle_font_ppem;
 975     float osd_font_ppem;
 976
 977     if (my_charset == NULL || my_charcodes == NULL) {
 978         mp_msg(MSGT_OSD, MSGL_ERR, "subtitle font: malloc failed.\n");
 979         goto err_out;
 980     }
 981
 982     switch (subtitle_autoscale) {
 983     case 1:
 984         movie_size = movie_height;
 985         break;
 986     case 2:
 987         movie_size = movie_width;
 988         break;
 989     case 3:
 990         movie_size = sqrt(movie_height*movie_height+movie_width*movie_width);
 991         break;
 992     default:
 993         movie_size = 100;
 994         break;
 995     }
 996
 997     subtitle_font_ppem = movie_size*font_scale_factor/100.0;
 998     osd_font_ppem = movie_size*(font_scale_factor+1)/100.0;
 999
1000     if (subtitle_font_ppem < 5) subtitle_font_ppem = 5;
1001     if (osd_font_ppem < 5) osd_font_ppem = 5;
1002
1003     if (subtitle_font_ppem > 128) subtitle_font_ppem = 128;
1004     if (osd_font_ppem > 128) osd_font_ppem = 128;
1005
1006     if ((subtitle_font_encoding == NULL)
1007         || (strcasecmp(subtitle_font_encoding, "unicode") == 0)) {
1008         unicode = 1;
1009     } else {
1010         unicode = 0;
1011     }
1012
1013     desc = init_font_desc();
1014     if(!desc) goto err_out;
1015
1016 //    t=GetTimer();
1017
1018     /* generate the subtitle font */
1019     err = load_sub_face(fname, face_index, &face);
1020     if (err) {
1021         mp_msg(MSGT_OSD, MSGL_WARN, MSGTR_LIBVO_FONT_LOAD_FT_SubFaceFailed);
1022         goto gen_osd;
1023     }
1024     desc->face_cnt++;
1025
1026 #ifdef CONFIG_ICONV
1027     if (unicode) {
1028         charset_size = prepare_charset_unicode(face, my_charset, my_charcodes);
1029     } else {
1030         if (subtitle_font_encoding) {
1031             charset_size = prepare_charset(charmap, subtitle_font_encoding, my_charset, my_charcodes);
1032         } else {
1033             charset_size = prepare_charset(charmap, "iso-8859-1", my_charset, my_charcodes);
1034         }
1035     }
1036
1037     if (charset_size < 0) {
1038         mp_msg(MSGT_OSD, MSGL_ERR, MSGTR_LIBVO_FONT_LOAD_FT_SubFontCharsetFailed);
1039         goto err_out;
1040     }
1041 #else
1042     goto err_out;
1043 #endif
1044
1045 //    fprintf(stderr, "fg: prepare t = %lf\n", GetTimer()-t);
1046
1047     err = prepare_font(desc, face, subtitle_font_ppem, desc->face_cnt-1,
1048                        charset_size, my_charset, my_charcodes, unicode,
1049                        subtitle_font_thickness, subtitle_font_radius);
1050
1051     if (err) {
1052         mp_msg(MSGT_OSD, MSGL_ERR, MSGTR_LIBVO_FONT_LOAD_FT_CannotPrepareSubtitleFont);
1053         goto err_out;
1054     }
1055
1056 gen_osd:
1057
1058     /* generate the OSD font */
1059     err = load_osd_face(&face);
1060     if (err) {
1061         goto err_out;
1062     }
1063     desc->face_cnt++;
1064
1065     err = prepare_font(desc, face, osd_font_ppem, desc->face_cnt-1,
1066                        OSD_CHARSET_SIZE, osd_charset, osd_charcodes, 0,
1067                        subtitle_font_thickness, subtitle_font_radius);
1068
1069     if (err) {
1070         mp_msg(MSGT_OSD, MSGL_ERR, MSGTR_LIBVO_FONT_LOAD_FT_CannotPrepareOSDFont);
1071         goto err_out;
1072     }
1073
1074     err = generate_tables(desc, subtitle_font_thickness, subtitle_font_radius);
1075
1076     if (err) {
1077         mp_msg(MSGT_OSD, MSGL_ERR, MSGTR_LIBVO_FONT_LOAD_FT_CannotGenerateTables);
1078         goto err_out;
1079     }
1080
1081     // final cleanup
1082     desc->font[' ']=-1;
1083     desc->width[' ']=desc->spacewidth;
1084
1085     j = '_';
1086     if (desc->font[j] < 0) j = '?';
1087     if (desc->font[j] < 0) j = ' ';
1088     render_one_glyph(desc, j);
1089     for(i = 0; i < 65536; i++) {
1090         if (desc->font[i] < 0 && i != ' ') {
1091             desc->start[i] = desc->start[j];
1092             desc->width[i] = desc->width[j];
1093             desc->font[i] = desc->font[j];
1094         }
1095     }
1096     free(my_charset);
1097     free(my_charcodes);
1098     return desc;
1099
1100 err_out:
1101     if (desc)
1102       free_font_desc(desc);
1103     free(my_charset);
1104     free(my_charcodes);
1105     return NULL;
1106 }
1107
1108 int init_freetype(void)
1109 {
1110     int err;
1111
1112     /* initialize freetype */
1113     err = FT_Init_FreeType(&library);
1114     if (err) {
1115         mp_msg(MSGT_OSD, MSGL_ERR, "Init_FreeType failed.\n");
1116         return -1;
1117     }
1118     mp_msg(MSGT_OSD, MSGL_V, "init_freetype\n");
1119     using_freetype = 1;
1120     return 0;
1121 }
1122
1123 int done_freetype(void)
1124 {
1125     int err;
1126
1127     if (!using_freetype)
1128         return 0;
1129
1130     err = FT_Done_FreeType(library);
1131     if (err) {
1132         mp_msg(MSGT_OSD, MSGL_ERR, MSGTR_LIBVO_FONT_LOAD_FT_DoneFreeTypeFailed);
1133         return -1;
1134     }
1135
1136     return 0;
1137 }
1138
1139 void load_font_ft(int width, int height, font_desc_t** fontp, const char *font_name, float font_scale_factor)
1140 {
1141 #ifdef CONFIG_FONTCONFIG
1142     FcPattern *fc_pattern;
1143     FcPattern *fc_pattern2;
1144     FcChar8 *s;
1145     int face_index;
1146     FcBool scalable;
1147 #endif
1148     font_desc_t *vo_font = *fontp;
1149     vo_image_width = width;
1150     vo_image_height = height;
1151
1152     // protection against vo_aa font hacks
1153     if (vo_font && !vo_font->dynamic) return;
1154
1155     if (vo_font) free_font_desc(vo_font);
1156
1157 #ifdef CONFIG_FONTCONFIG
1158     if (font_fontconfig > 0)
1159     {
1160         if (!font_name)
1161             font_name = strdup("sans-serif");
1162         FcInit();
1163         fc_pattern = FcNameParse(font_name);
1164         FcConfigSubstitute(0, fc_pattern, FcMatchPattern);
1165         FcDefaultSubstitute(fc_pattern);
1166         fc_pattern2 = fc_pattern;
1167         fc_pattern = FcFontMatch(0, fc_pattern, 0);
1168         FcPatternDestroy(fc_pattern2);
1169         FcPatternGetBool(fc_pattern, FC_SCALABLE, 0, &scalable);
1170         if (scalable != FcTrue) {
1171             FcPatternDestroy(fc_pattern);
1172             fc_pattern = FcNameParse("sans-serif");
1173             FcConfigSubstitute(0, fc_pattern, FcMatchPattern);
1174             FcDefaultSubstitute(fc_pattern);
1175             fc_pattern2 = fc_pattern;
1176             fc_pattern = FcFontMatch(0, fc_pattern, 0);
1177             FcPatternDestroy(fc_pattern2);
1178         }
1179         // s doesn't need to be freed according to fontconfig docs
1180         FcPatternGetString(fc_pattern, FC_FILE, 0, &s);
1181         FcPatternGetInteger(fc_pattern, FC_INDEX, 0, &face_index);
1182         *fontp=read_font_desc_ft(s, face_index, width, height, font_scale_factor);
1183         FcPatternDestroy(fc_pattern);
1184     }
1185     else
1186 #endif
1187     *fontp=read_font_desc_ft(font_name, 0, width, height, font_scale_factor);
1188 }