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 */
20 #ifndef __ART_SVP_RENDER_AA_H__
21 #define __ART_SVP_RENDER_AA_H__
23 /* The spiffy antialiased renderer for sorted vector paths. */
25 #ifdef __cplusplus
26 extern "C" {
27 #endif /* __cplusplus */
29 typedef struct _ArtSVPRenderAAStep ArtSVPRenderAAStep;
30 typedef struct _ArtSVPRenderAAIter ArtSVPRenderAAIter;
32 struct _ArtSVPRenderAAStep {
33 int x;
34 int delta; /* stored with 16 fractional bits */
35 };
37 ArtSVPRenderAAIter *
38 art_svp_render_aa_iter (const ArtSVP *svp,
39 int x0, int y0, int x1, int y1);
41 void
42 art_svp_render_aa_iter_step (ArtSVPRenderAAIter *iter, int *p_start,
43 ArtSVPRenderAAStep **p_steps, int *p_n_steps);
45 void
46 art_svp_render_aa_iter_done (ArtSVPRenderAAIter *iter);
48 void
49 art_svp_render_aa (const ArtSVP *svp,
50 int x0, int y0, int x1, int y1,
51 void (*callback) (void *callback_data,
52 int y,
53 int start,
54 ArtSVPRenderAAStep *steps, int n_steps),
55 void *callback_data);
57 #ifdef __cplusplus
58 }
59 #endif /* __cplusplus */
61 #endif /* __ART_SVP_RENDER_AA_H__ */