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
25 static 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
34 static pixman_image_t *
create_conical(int index)35 create_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
49 int
main(int argc,char ** argv)50 main (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