diff options
author | sanine <sanine.not@pm.me> | 2022-10-12 13:26:36 -0500 |
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committer | sanine <sanine.not@pm.me> | 2022-10-12 13:26:36 -0500 |
commit | f567ea1e2798fd3156a416e61f083ea3e6b95719 (patch) | |
tree | 53b51bda93aadf9dd13fcd77635b8c4b5c813768 /libs/pixman-0.40.0/demos/linear-gradient.c | |
parent | 530ffd0b7d3c39757b20f00716e486b5caf89aff (diff) |
add pixman and libpngraylib
Diffstat (limited to 'libs/pixman-0.40.0/demos/linear-gradient.c')
-rw-r--r-- | libs/pixman-0.40.0/demos/linear-gradient.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/libs/pixman-0.40.0/demos/linear-gradient.c b/libs/pixman-0.40.0/demos/linear-gradient.c new file mode 100644 index 0000000..46433a6 --- /dev/null +++ b/libs/pixman-0.40.0/demos/linear-gradient.c @@ -0,0 +1,50 @@ +#include "../test/utils.h" +#include "gtk-utils.h" + +#define WIDTH 1024 +#define HEIGHT 640 + +int +main (int argc, char **argv) +{ + pixman_image_t *src_img, *dest_img; + pixman_gradient_stop_t stops[] = { + { 0x00000, { 0x0000, 0x0000, 0x4444, 0xdddd } }, + { 0x10000, { 0xeeee, 0xeeee, 0x8888, 0xdddd } }, +#if 0 + /* These colors make it very obvious that dithering + * is useful even for 8-bit gradients + */ + { 0x00000, { 0x6666, 0x3333, 0x3333, 0xffff } }, + { 0x10000, { 0x3333, 0x6666, 0x6666, 0xffff } }, +#endif + }; + pixman_point_fixed_t p1, p2; + + enable_divbyzero_exceptions (); + + dest_img = pixman_image_create_bits (PIXMAN_x8r8g8b8, + WIDTH, HEIGHT, + NULL, 0); + + p1.x = p1.y = 0x0000; + p2.x = WIDTH << 16; + p2.y = HEIGHT << 16; + + src_img = pixman_image_create_linear_gradient (&p1, &p2, stops, ARRAY_LENGTH (stops)); + + pixman_image_composite32 (PIXMAN_OP_OVER, + src_img, + NULL, + dest_img, + 0, 0, + 0, 0, + 0, 0, + WIDTH, HEIGHT); + + show_image (dest_img); + + pixman_image_unref (dest_img); + + return 0; +} |