lib/art/art_svp_render_aa.h

   1 /* Libart_LGPL - library of basic graphic primitives
   2  * Copyright (C) 1998 Raph Levien
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 #ifndef __ART_SVP_RENDER_AA_H__
  21 #define __ART_SVP_RENDER_AA_H__
  22
  23 /* The spiffy antialiased renderer for sorted vector paths. */
  24
  25 #ifdef LIBART_COMPILATION
  26 #include "art_svp.h"
  27 #else
  28 #include "art_svp.h"
  29 #endif
  30
  31 #ifdef __cplusplus
  32 extern "C" {
  33 #endif /* __cplusplus */
  34
  35 typedef struct _ArtSVPRenderAAStep ArtSVPRenderAAStep;
  36 typedef struct _ArtSVPRenderAAIter ArtSVPRenderAAIter;
  37
  38 struct _ArtSVPRenderAAStep {
  39   int x;
  40   int delta; /* stored with 16 fractional bits */
  41 };
  42
  43 ArtSVPRenderAAIter *
  44 art_svp_render_aa_iter (const ArtSVP *svp,
  45                         int x0, int y0, int x1, int y1);
  46
  47 void
  48 art_svp_render_aa_iter_step (ArtSVPRenderAAIter *iter, int *p_start,
  49                              ArtSVPRenderAAStep **p_steps, int *p_n_steps);
  50
  51 void
  52 art_svp_render_aa_iter_done (ArtSVPRenderAAIter *iter);
  53
  54 void
  55 art_svp_render_aa (const ArtSVP *svp,
  56                    int x0, int y0, int x1, int y1,
  57                    void (*callback) (void *callback_data,
  58                                      int y,
  59                                      int start,
  60                                      ArtSVPRenderAAStep *steps, int n_steps),
  61                    void *callback_data);
  62
  63 #ifdef __cplusplus
  64 }
  65 #endif /* __cplusplus */
  66
  67 #endif /* __ART_SVP_RENDER_AA_H__ */