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