2 * art_render_gradient.h: Gradient image source for modular rendering.
4 * Libart_LGPL - library of basic graphic primitives
5 * Copyright (C) 2000 Raph Levien
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library 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 GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
22 * Authors: Raph Levien <raph@acm.org>
23 * Alexander Larsson <alla@lysator.liu.se>
26 #ifndef __ART_RENDER_GRADIENT_H__
27 #define __ART_RENDER_GRADIENT_H__
29 #ifdef LIBART_COMPILATION
30 #include "art_filterlevel.h"
31 #include "art_render.h"
33 #include "art_filterlevel.h"
34 #include "art_render.h"
39 #endif /* __cplusplus */
41 typedef struct _ArtGradientLinear ArtGradientLinear;
42 typedef struct _ArtGradientRadial ArtGradientRadial;
43 typedef struct _ArtGradientStop ArtGradientStop;
51 struct _ArtGradientLinear {
55 ArtGradientSpread spread;
57 ArtGradientStop *stops;
60 struct _ArtGradientRadial {
61 double affine[6]; /* transforms user coordinates to unit circle */
62 double fx, fy; /* focal point in unit circle coords */
64 ArtGradientStop *stops;
67 struct _ArtGradientStop {
69 ArtPixMaxDepth color[ART_MAX_CHAN + 1];
73 art_render_gradient_linear (ArtRender *render,
74 const ArtGradientLinear *gradient,
75 ArtFilterLevel level);
78 art_render_gradient_radial (ArtRender *render,
79 const ArtGradientRadial *gradient,
80 ArtFilterLevel level);
84 #endif /* __cplusplus */
86 #endif /* __ART_RENDER_GRADIENT_H__ */