1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
#ifndef __NR_GRADIENT_H__
#define __NR_GRADIENT_H__
/*
* Pixel buffer rendering library
*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
*
* Copyright (C) 2001-2002 Lauris Kaplinski
* Copyright (C) 2001-2002 Ximian, Inc.
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
/*
* Derived in part from public domain code by Lauris Kaplinski
*/
#include <libnr/nr-matrix.h>
#include <libnr/nr-render.h>
#define NR_GRADIENT_VECTOR_BITS 10
#define NR_GRADIENT_VECTOR_LENGTH (1<<NR_GRADIENT_VECTOR_BITS)
enum {
NR_GRADIENT_SPREAD_PAD,
NR_GRADIENT_SPREAD_REFLECT,
NR_GRADIENT_SPREAD_REPEAT
};
/* Linear */
struct NRLGradientRenderer {
NRRenderer renderer;
const unsigned char *vector;
unsigned int spread;
double x0, y0;
double dx, dy;
};
NRRenderer *nr_lgradient_renderer_setup (NRLGradientRenderer *lgr,
const unsigned char *cv,
unsigned int spread,
const NRMatrix *gs2px,
float x0, float y0,
float x1, float y1);
/* Radial */
struct NRRGradientRenderer {
NRRenderer renderer;
const unsigned char *vector;
unsigned int spread;
NRMatrix px2gs;
float cx, cy;
float fx, fy;
float r;
float C;
};
NRRenderer *nr_rgradient_renderer_setup (NRRGradientRenderer *rgr,
const unsigned char *cv,
unsigned int spread,
const NRMatrix *gs2px,
float cx, float cy,
float fx, float fy,
float r);
#endif
|
