lib/filters/one_big_font.c

   1 /* remove_font_transform.c
   2
   3    Part of the swftools package.
   4
   5    Copyright (c) 2010 Matthias Kramm <kramm@quiss.org>
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
  20
  21 #include <stdlib.h>
  22 #include <memory.h>
  23 #include "../gfxfilter.h"
  24 #include "../gfxtools.h"
  25 #include "../gfxfont.h"
  26 #include "../types.h"
  27 #include "../mem.h"
  28
  29 typedef struct _internal {
  30     gfxfontlist_t*fonts;
  31     gfxfont_t*font;
  32     int num_glyphs;
  33 } internal_t;
  34
  35 typedef struct _fontdata {
  36     gfxfont_t*font;
  37     int start;
  38 } fontdata_t;
  39
  40 static void pass1_drawchar(gfxfilter_t*f, gfxfont_t*font, int glyphnr, gfxcolor_t*color, gfxmatrix_t*matrix, gfxdevice_t*out)
  41 {
  42     internal_t*i = (internal_t*)f->internal;
  43     fontdata_t*d = gfxfontlist_getuserdata(i->fonts, font->id);
  44     if(!d) {
  45         d = rfx_calloc(sizeof(fontdata_t));
  46         d->font = font;
  47         d->start = i->num_glyphs;
  48         i->num_glyphs  += font->num_glyphs;
  49         i->fonts = gfxfontlist_addfont2(i->fonts, font, d);
  50     }
  51     out->drawchar(out, font, glyphnr, color, matrix);
  52 }
  53 static gfxresult_t*pass1_finish(gfxfilter_t*f, gfxdevice_t*out)
  54 {
  55     internal_t*i = (internal_t*)f->internal;
  56     gfxfont_t*font = i->font = rfx_calloc(sizeof(gfxfont_t));
  57     font->id = strdup("onebigfont");
  58     font->num_glyphs = i->num_glyphs;
  59     font->glyphs = rfx_calloc(sizeof(gfxglyph_t)*i->num_glyphs);
  60     gfxfontlist_t*l = i->fonts;
  61     while(l) {
  62         gfxfont_t*old = l->font;
  63         fontdata_t*d = l->user;
  64         memcpy(font->glyphs + d->start, old->glyphs, sizeof(gfxglyph_t)*old->num_glyphs);
  65         if(old->ascent > font->ascent)
  66             font->ascent = old->ascent;
  67         if(old->descent > font->descent)
  68             font->descent = old->descent;
  69         l = l->next;
  70     }
  71     gfxfont_fix_unicode(font, 0);
  72     return out->finish(out);
  73 }
  74
  75 static void pass2_addfont(gfxfilter_t*f, gfxfont_t*font, gfxdevice_t*out)
  76 {
  77     internal_t*i = (internal_t*)f->internal;
  78     out->addfont(out, i->font);
  79 }
  80 static void pass2_drawchar(gfxfilter_t*f, gfxfont_t*font, int glyphnr, gfxcolor_t*color, gfxmatrix_t*matrix, gfxdevice_t*out)
  81 {
  82     internal_t*i = (internal_t*)f->internal;
  83     fontdata_t*d = gfxfontlist_getuserdata(i->fonts, font->id);
  84     out->drawchar(out, i->font, glyphnr + d->start, color, matrix);
  85 }
  86 static gfxresult_t*pass2_finish(gfxfilter_t*f, gfxdevice_t*out)
  87 {
  88     internal_t*i = (internal_t*)f->internal;
  89     // clean up
  90     gfxfontlist_t*l = i->fonts;
  91     while(l) {
  92         free(l->user);l->user=0;
  93         l=l->next;
  94     }
  95     gfxfontlist_free(i->fonts, 0);i->fonts=0;
  96     return out->finish(out);
  97 }
  98
  99 void gfxtwopassfilter_one_big_font_init(gfxtwopassfilter_t*f)
 100 {
 101     internal_t*i = (internal_t*)rfx_calloc(sizeof(internal_t));
 102
 103     memset(f, 0, sizeof(gfxtwopassfilter_t));
 104     f->type = gfxfilter_twopass;
 105
 106     f->pass1.name = "filter \"one big font\" pass 1";
 107     f->pass1.drawchar = pass1_drawchar;
 108     f->pass1.finish = pass1_finish;
 109     f->pass1.internal = i;
 110
 111     f->pass2.name = "filter \"one big font\" pass 2";
 112     f->pass2.addfont = pass2_addfont;
 113     f->pass2.drawchar = pass2_drawchar;
 114     f->pass2.finish = pass2_finish;
 115     f->pass2.internal = i;
 116 }
 117