lib/gfxfilter.c

   1 /* gfxfilter.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 <stdio.h>
  23 #include <string.h>
  24 #include <assert.h>
  25 #include "mem.h"
  26 #include "gfxfilter.h"
  27 #include "devices/record.h"
  28
  29 typedef struct _internal {
  30     gfxfilter_t*filter;
  31     gfxdevice_t*out;
  32
  33     /* for two pass filters: */
  34     gfxdevice_t*final_out;
  35     int pass;
  36     int num_passes;
  37     gfxdevice_t record;
  38     gfxtwopassfilter_t*twopass;
  39 } internal_t;
  40
  41 static int filter_setparameter(gfxdevice_t*dev, const char*key, const char*value)
  42 {
  43     internal_t*i = (internal_t*)dev->internal;
  44     return i->filter->setparameter(i->filter, key, value, i->out);
  45 }
  46 static void filter_startpage(gfxdevice_t*dev, int width, int height)
  47 {
  48     internal_t*i = (internal_t*)dev->internal;
  49     i->filter->startpage(i->filter, width, height, i->out);
  50 }
  51 static void filter_startclip(gfxdevice_t*dev, gfxline_t*line)
  52 {
  53     internal_t*i = (internal_t*)dev->internal;
  54     i->filter->startclip(i->filter, line, i->out);
  55 }
  56 static void filter_endclip(gfxdevice_t*dev)
  57 {
  58     internal_t*i = (internal_t*)dev->internal;
  59     i->filter->endclip(i->filter, i->out);
  60 }
  61 static void filter_stroke(gfxdevice_t*dev, gfxline_t*line, gfxcoord_t width, gfxcolor_t*color, gfx_capType cap_style, gfx_joinType joint_style, gfxcoord_t miterLimit)
  62 {
  63     internal_t*i = (internal_t*)dev->internal;
  64     i->filter->stroke(i->filter, line, width, color, cap_style, joint_style, miterLimit, i->out);
  65 }
  66 static void filter_fill(gfxdevice_t*dev, gfxline_t*line, gfxcolor_t*color)
  67 {
  68     internal_t*i = (internal_t*)dev->internal;
  69     i->filter->fill(i->filter, line, color, i->out);
  70 }
  71 static void filter_fillbitmap(gfxdevice_t*dev, gfxline_t*line, gfximage_t*img, gfxmatrix_t*matrix, gfxcxform_t*cxform)
  72 {
  73     internal_t*i = (internal_t*)dev->internal;
  74     i->filter->fillbitmap(i->filter, line, img, matrix, cxform, i->out);
  75 }
  76 static void filter_fillgradient(gfxdevice_t*dev, gfxline_t*line, gfxgradient_t*gradient, gfxgradienttype_t type, gfxmatrix_t*matrix)
  77 {
  78     internal_t*i = (internal_t*)dev->internal;
  79     i->filter->fillgradient(i->filter, line, gradient, type, matrix, i->out);
  80 }
  81 static void filter_addfont(gfxdevice_t*dev, gfxfont_t*font)
  82 {
  83     internal_t*i = (internal_t*)dev->internal;
  84     i->filter->addfont(i->filter, font, i->out);
  85 }
  86 static void filter_drawchar(gfxdevice_t*dev, gfxfont_t*font, int glyphnr, gfxcolor_t*color, gfxmatrix_t*matrix)
  87 {
  88     internal_t*i = (internal_t*)dev->internal;
  89     i->filter->drawchar(i->filter, font, glyphnr, color, matrix, i->out);
  90 }
  91 static void filter_drawlink(gfxdevice_t*dev, gfxline_t*line, const char*action)
  92 {
  93     internal_t*i = (internal_t*)dev->internal;
  94     i->filter->drawlink(i->filter, line, action, i->out);
  95 }
  96 static void filter_endpage(gfxdevice_t*dev)
  97 {
  98     internal_t*i = (internal_t*)dev->internal;
  99     i->filter->endpage(i->filter, i->out);
 100 }
 101 static gfxresult_t* filter_finish(gfxdevice_t*dev)
 102 {
 103     internal_t*i = (internal_t*)dev->internal;
 104     gfxresult_t*r;
 105     if(i->filter->finish) {
 106         r = i->filter->finish(i->filter, i->out);
 107     } else {
 108         r = i->out->finish(i->out);
 109     }
 110     if(i->filter->internal) {
 111         free(i->filter->internal);
 112         i->filter->internal = 0;
 113     }
 114     free(i->filter);i->filter=0;
 115     free(dev->internal);dev->internal=0;free(dev);
 116     return r;
 117 }
 118
 119
 120 static int passthrough_setparameter(gfxdevice_t*dev, const char*key, const char*value)
 121 {
 122     internal_t*i = (internal_t*)dev->internal;
 123     return i->out->setparameter(i->out, key, value);
 124 }
 125 static void passthrough_startpage(gfxdevice_t*dev, int width, int height)
 126 {
 127     internal_t*i = (internal_t*)dev->internal;
 128     i->out->startpage(i->out, width, height);
 129 }
 130 static void passthrough_startclip(gfxdevice_t*dev, gfxline_t*line)
 131 {
 132     internal_t*i = (internal_t*)dev->internal;
 133     i->out->startclip(i->out, line);
 134 }
 135 static void passthrough_endclip(gfxdevice_t*dev)
 136 {
 137     internal_t*i = (internal_t*)dev->internal;
 138     i->out->endclip(i->out);
 139 }
 140 static void passthrough_stroke(gfxdevice_t*dev, gfxline_t*line, gfxcoord_t width, gfxcolor_t*color, gfx_capType cap_style, gfx_joinType joint_style, gfxcoord_t miterLimit)
 141 {
 142     internal_t*i = (internal_t*)dev->internal;
 143     i->out->stroke(i->out, line, width, color, cap_style, joint_style, miterLimit);
 144 }
 145 static void passthrough_fill(gfxdevice_t*dev, gfxline_t*line, gfxcolor_t*color)
 146 {
 147     internal_t*i = (internal_t*)dev->internal;
 148     i->out->fill(i->out, line, color);
 149 }
 150 static void passthrough_fillbitmap(gfxdevice_t*dev, gfxline_t*line, gfximage_t*img, gfxmatrix_t*matrix, gfxcxform_t*cxform)
 151 {
 152     internal_t*i = (internal_t*)dev->internal;
 153     i->out->fillbitmap(i->out, line, img, matrix, cxform);
 154 }
 155 static void passthrough_fillgradient(gfxdevice_t*dev, gfxline_t*line, gfxgradient_t*gradient, gfxgradienttype_t type, gfxmatrix_t*matrix)
 156 {
 157     internal_t*i = (internal_t*)dev->internal;
 158     i->out->fillgradient(i->out, line, gradient, type, matrix);
 159 }
 160 static void passthrough_addfont(gfxdevice_t*dev, gfxfont_t*font)
 161 {
 162     internal_t*i = (internal_t*)dev->internal;
 163     i->out->addfont(i->out, font);
 164 }
 165 static void passthrough_drawchar(gfxdevice_t*dev, gfxfont_t*font, int glyphnr, gfxcolor_t*color, gfxmatrix_t*matrix)
 166 {
 167     internal_t*i = (internal_t*)dev->internal;
 168     i->out->drawchar(i->out, font, glyphnr, color, matrix);
 169 }
 170 static void passthrough_drawlink(gfxdevice_t*dev, gfxline_t*line, const char*action)
 171 {
 172     internal_t*i = (internal_t*)dev->internal;
 173     i->out->drawlink(i->out, line, action);
 174 }
 175 static void passthrough_endpage(gfxdevice_t*dev)
 176 {
 177     internal_t*i = (internal_t*)dev->internal;
 178     i->out->endpage(i->out);
 179 }
 180
 181 int discard_setparameter(gfxdevice_t*dev, const char*key, const char*value)
 182 {
 183     return 0;
 184 }
 185 static void discard_startpage(gfxdevice_t*dev, int width, int height)
 186 {
 187 }
 188 static void discard_startclip(gfxdevice_t*dev, gfxline_t*line)
 189 {
 190 }
 191 static void discard_endclip(gfxdevice_t*dev)
 192 {
 193 }
 194 static void discard_stroke(gfxdevice_t*dev, gfxline_t*line, gfxcoord_t width, gfxcolor_t*color, gfx_capType cap_style, gfx_joinType joint_style, gfxcoord_t miterLimit)
 195 {
 196 }
 197 static void discard_fill(gfxdevice_t*dev, gfxline_t*line, gfxcolor_t*color)
 198 {
 199 }
 200 static void discard_fillbitmap(gfxdevice_t*dev, gfxline_t*line, gfximage_t*img, gfxmatrix_t*matrix, gfxcxform_t*cxform)
 201 {
 202 }
 203 static void discard_fillgradient(gfxdevice_t*dev, gfxline_t*line, gfxgradient_t*gradient, gfxgradienttype_t type, gfxmatrix_t*matrix)
 204 {
 205 }
 206 static void discard_addfont(gfxdevice_t*dev, gfxfont_t*font)
 207 {
 208 }
 209 static void discard_drawchar(gfxdevice_t*dev, gfxfont_t*font, int glyphnr, gfxcolor_t*color, gfxmatrix_t*matrix)
 210 {
 211 }
 212 static void discard_drawlink(gfxdevice_t*dev, gfxline_t*line, const char*action)
 213 {
 214 }
 215 static void discard_endpage(gfxdevice_t*dev)
 216 {
 217 }
 218 static gfxresult_t* discard_finish(gfxdevice_t*dev)
 219 {
 220     return 0;
 221 }
 222
 223 gfxdevice_t*gfxfilter_apply(gfxfilter_t*_filter, gfxdevice_t*out)
 224 {
 225     internal_t*i = (internal_t*)rfx_calloc(sizeof(internal_t));
 226     gfxdevice_t*dev = (gfxdevice_t*)rfx_calloc(sizeof(gfxdevice_t));
 227     gfxfilter_t*filter = (gfxfilter_t*)rfx_alloc(sizeof(gfxfilter_t));
 228     memcpy(filter, _filter, sizeof(gfxfilter_t));
 229
 230     i->out = out;
 231     i->filter = filter;
 232     i->pass = 1;
 233
 234     dev->internal = i;
 235     dev->name = filter->name?filter->name:"filter";
 236     dev->setparameter = filter->setparameter?filter_setparameter:passthrough_setparameter;
 237     dev->startpage = filter->startpage?filter_startpage:passthrough_startpage;
 238     dev->startclip = filter->startclip?filter_startclip:passthrough_startclip;
 239     dev->endclip = filter->endclip?filter_endclip:passthrough_endclip;
 240     dev->stroke = filter->stroke?filter_stroke:passthrough_stroke;
 241     dev->fill = filter->fill?filter_fill:passthrough_fill;
 242     dev->fillbitmap = filter->fillbitmap?filter_fillbitmap:passthrough_fillbitmap;
 243     dev->fillgradient = filter->fillgradient?filter_fillgradient:passthrough_fillgradient;
 244     dev->addfont = filter->addfont?filter_addfont:passthrough_addfont;
 245     dev->drawchar = filter->drawchar?filter_drawchar:passthrough_drawchar;
 246     dev->drawlink = filter->drawlink?filter_drawlink:passthrough_drawlink;
 247     dev->endpage = filter->endpage?filter_endpage:passthrough_endpage;
 248     dev->finish = filter_finish;
 249     return dev;
 250 }
 251
 252 static void setup_twopass(gfxdevice_t*dev, gfxfilter_t*filter)
 253 {
 254     dev->name = filter->name?filter->name:"filter";
 255     dev->setparameter = filter->setparameter?filter_setparameter:passthrough_setparameter;
 256     dev->startpage = filter->startpage?filter_startpage:passthrough_startpage;
 257     dev->startclip = filter->startclip?filter_startclip:passthrough_startclip;
 258     dev->endclip = filter->endclip?filter_endclip:passthrough_endclip;
 259     dev->stroke = filter->stroke?filter_stroke:passthrough_stroke;
 260     dev->fill = filter->fill?filter_fill:passthrough_fill;
 261     dev->fillbitmap = filter->fillbitmap?filter_fillbitmap:passthrough_fillbitmap;
 262     dev->fillgradient = filter->fillgradient?filter_fillgradient:passthrough_fillgradient;
 263     dev->addfont = filter->addfont?filter_addfont:passthrough_addfont;
 264     dev->drawchar = filter->drawchar?filter_drawchar:passthrough_drawchar;
 265     dev->drawlink = filter->drawlink?filter_drawlink:passthrough_drawlink;
 266     dev->endpage = filter->endpage?filter_endpage:passthrough_endpage;
 267 }
 268
 269 static gfxresult_t* twopass_finish(gfxdevice_t*dev)
 270 {
 271     internal_t*i = (internal_t*)dev->internal;
 272
 273     gfxresult_t*r;
 274     if(i->filter->finish) {
 275         r = i->filter->finish(i->filter, i->out);
 276     } else {
 277         r = i->out->finish(i->out);
 278     }
 279
 280     if(i->pass == i->num_passes) {
 281         free(i->twopass);
 282         i->twopass = 0;
 283         i->filter = 0;
 284         free(i);
 285         dev->internal=0;
 286         free(dev);
 287         return r;
 288     }
 289
 290     /* switch to next pass filter */
 291     i->filter = &i->twopass->pass2;
 292     setup_twopass(dev, i->filter);
 293     dev->finish = twopass_finish;
 294
 295     if(i->pass == i->num_passes-1) {
 296         /* we don't record in the final pass- we just stream out to the
 297            next output device */
 298         i->out = i->final_out;
 299     } else {
 300         // switch to a new tempfile- this only happens for 3 passes or more
 301         assert(i->num_passes>2);
 302         gfxdevice_record_init(&i->record, /*use tempfile*/1);
 303         i->out = &i->record;
 304     }
 305
 306     i->pass++;
 307     gfxresult_record_replay(r, i->out);
 308     r->destroy(r);
 309
 310     return twopass_finish(dev);
 311 }
 312
 313 gfxdevice_t*gfxtwopassfilter_apply(gfxtwopassfilter_t*_twopass, gfxdevice_t*out)
 314 {
 315     internal_t*i = (internal_t*)rfx_calloc(sizeof(internal_t));
 316     gfxdevice_t*dev = (gfxdevice_t*)rfx_calloc(sizeof(gfxdevice_t));
 317
 318     gfxtwopassfilter_t*twopass = (gfxtwopassfilter_t*)rfx_alloc(sizeof(gfxtwopassfilter_t));
 319     memcpy(twopass, _twopass, sizeof(gfxtwopassfilter_t));
 320
 321     gfxdevice_record_init(&i->record, /*use tempfile*/1);
 322
 323     i->out = &i->record;
 324     i->final_out = out;
 325     i->twopass = twopass;
 326     i->pass = 1;
 327     i->num_passes = 2;
 328
 329     dev->internal = i;
 330
 331     i->filter = &twopass->pass1;
 332     setup_twopass(dev, i->filter);
 333     dev->finish = twopass_finish;
 334
 335     return dev;
 336 }
 337