1#include "../test/utils.h"
2#include "gtk-utils.h"
3
4#define SIZE 128
5#define GRADIENTS_PER_ROW 7
6#define NUM_ROWS ((NUM_GRADIENTS + GRADIENTS_PER_ROW - 1) / GRADIENTS_PER_ROW)
7#define WIDTH (SIZE * GRADIENTS_PER_ROW)
8#define HEIGHT (SIZE * NUM_ROWS)
9#define NUM_GRADIENTS 35
10
11#define double_to_color(x)					\
12    (((uint32_t) ((x)*65536)) - (((uint32_t) ((x)*65536)) >> 16))
13
14#define PIXMAN_STOP(offset,r,g,b,a)		\
15    { pixman_double_to_fixed (offset),		\
16	{					\
17	    double_to_color (r),		\
18		double_to_color (g),		\
19		double_to_color (b),		\
20		double_to_color (a)		\
21	}					\
22    }
23
24
25static const pixman_gradient_stop_t stops[] = {
26    PIXMAN_STOP (0.25,       1, 0, 0, 0.7),
27    PIXMAN_STOP (0.5,        1, 1, 0, 0.7),
28    PIXMAN_STOP (0.75,       0, 1, 0, 0.7),
29    PIXMAN_STOP (1.0,        0, 0, 1, 0.7)
30};
31
32#define NUM_STOPS (sizeof (stops) / sizeof (stops[0]))
33
34static pixman_image_t *
35create_conical (int index)
36{
37    pixman_point_fixed_t c;
38    double angle;
39
40    c.x = pixman_double_to_fixed (0);
41    c.y = pixman_double_to_fixed (0);
42
43    angle = (0.5 / NUM_GRADIENTS + index / (double)NUM_GRADIENTS) * 720 - 180;
44
45    return pixman_image_create_conical_gradient (
46	&c, pixman_double_to_fixed (angle), stops, NUM_STOPS);
47}
48
49int
50main (int argc, char **argv)
51{
52    pixman_transform_t transform;
53    pixman_image_t *src_img, *dest_img;
54    int i;
55
56    enable_divbyzero_exceptions ();
57
58    dest_img = pixman_image_create_bits (PIXMAN_a8r8g8b8,
59					 WIDTH, HEIGHT,
60					 NULL, 0);
61
62    draw_checkerboard (dest_img, 25, 0xffaaaaaa, 0xff888888);
63
64    pixman_transform_init_identity (&transform);
65
66    pixman_transform_translate (NULL, &transform,
67				pixman_double_to_fixed (0.5),
68				pixman_double_to_fixed (0.5));
69
70    pixman_transform_scale (NULL, &transform,
71			    pixman_double_to_fixed (SIZE),
72			    pixman_double_to_fixed (SIZE));
73    pixman_transform_translate (NULL, &transform,
74				pixman_double_to_fixed (0.5),
75				pixman_double_to_fixed (0.5));
76
77    for (i = 0; i < NUM_GRADIENTS; i++)
78    {
79	int column = i % GRADIENTS_PER_ROW;
80	int row = i / GRADIENTS_PER_ROW;
81
82	src_img = create_conical (i);
83	pixman_image_set_repeat (src_img, PIXMAN_REPEAT_NORMAL);
84
85	pixman_image_set_transform (src_img, &transform);
86
87	pixman_image_composite32 (
88	    PIXMAN_OP_OVER, src_img, NULL,dest_img,
89	    0, 0, 0, 0, column * SIZE, row * SIZE,
90	    SIZE, SIZE);
91
92	pixman_image_unref (src_img);
93    }
94
95    show_image (dest_img);
96
97    pixman_image_unref (dest_img);
98
99    return 0;
100}
101