From f567ea1e2798fd3156a416e61f083ea3e6b95719 Mon Sep 17 00:00:00 2001 From: sanine Date: Wed, 12 Oct 2022 13:26:36 -0500 Subject: add pixman and libpng --- libs/pixman-0.40.0/demos/clip-test.c | 97 ++++++++++++++++++++++++++++++++++++ 1 file changed, 97 insertions(+) create mode 100644 libs/pixman-0.40.0/demos/clip-test.c (limited to 'libs/pixman-0.40.0/demos/clip-test.c') diff --git a/libs/pixman-0.40.0/demos/clip-test.c b/libs/pixman-0.40.0/demos/clip-test.c new file mode 100644 index 0000000..aa0df44 --- /dev/null +++ b/libs/pixman-0.40.0/demos/clip-test.c @@ -0,0 +1,97 @@ +#include +#include +#include "pixman.h" +#include "gtk-utils.h" + +#define WIDTH 200 +#define HEIGHT 200 + +static pixman_image_t * +create_solid_bits (uint32_t pixel) +{ + uint32_t *pixels = malloc (WIDTH * HEIGHT * 4); + int i; + + for (i = 0; i < WIDTH * HEIGHT; ++i) + pixels[i] = pixel; + + return pixman_image_create_bits (PIXMAN_a8r8g8b8, + WIDTH, HEIGHT, + pixels, + WIDTH * 4); +} + +int +main (int argc, char **argv) +{ + pixman_image_t *gradient_img; + pixman_image_t *src_img, *dst_img; + pixman_gradient_stop_t stops[2] = + { + { pixman_int_to_fixed (0), { 0xffff, 0x0000, 0x0000, 0xffff } }, + { pixman_int_to_fixed (1), { 0xffff, 0xffff, 0x0000, 0xffff } } + }; +#if 0 + pixman_point_fixed_t p1 = { 0, 0 }; + pixman_point_fixed_t p2 = { pixman_int_to_fixed (WIDTH), + pixman_int_to_fixed (HEIGHT) }; +#endif + pixman_point_fixed_t c_inner; + pixman_point_fixed_t c_outer; + pixman_fixed_t r_inner; + pixman_fixed_t r_outer; + pixman_region32_t clip_region; + pixman_transform_t trans = { + { { pixman_double_to_fixed (1.3), pixman_double_to_fixed (0), pixman_double_to_fixed (-0.5), }, + { pixman_double_to_fixed (0), pixman_double_to_fixed (1), pixman_double_to_fixed (-0.5), }, + { pixman_double_to_fixed (0), pixman_double_to_fixed (0), pixman_double_to_fixed (1.0) } + } + }; + + src_img = create_solid_bits (0xff0000ff); + + c_inner.x = pixman_double_to_fixed (100.0); + c_inner.y = pixman_double_to_fixed (100.0); + c_outer.x = pixman_double_to_fixed (100.0); + c_outer.y = pixman_double_to_fixed (100.0); + r_inner = 0; + r_outer = pixman_double_to_fixed (100.0); + + gradient_img = pixman_image_create_radial_gradient (&c_inner, &c_outer, + r_inner, r_outer, + stops, 2); + +#if 0 + gradient_img = pixman_image_create_linear_gradient (&p1, &p2, + stops, 2); + +#endif + + pixman_image_composite (PIXMAN_OP_OVER, gradient_img, NULL, src_img, + 0, 0, 0, 0, 0, 0, WIDTH, HEIGHT); + + pixman_region32_init_rect (&clip_region, 50, 0, 100, 200); + pixman_image_set_clip_region32 (src_img, &clip_region); + pixman_image_set_source_clipping (src_img, TRUE); + pixman_image_set_has_client_clip (src_img, TRUE); + pixman_image_set_transform (src_img, &trans); + pixman_image_set_repeat (src_img, PIXMAN_REPEAT_NORMAL); + + dst_img = create_solid_bits (0xffff0000); + pixman_image_composite (PIXMAN_OP_OVER, src_img, NULL, dst_img, + 0, 0, 0, 0, 0, 0, WIDTH, HEIGHT); + + +#if 0 + printf ("0, 0: %x\n", src[0]); + printf ("10, 10: %x\n", src[10 * 10 + 10]); + printf ("w, h: %x\n", src[(HEIGHT - 1) * 100 + (WIDTH - 1)]); +#endif + + show_image (dst_img); + + pixman_image_unref (gradient_img); + pixman_image_unref (src_img); + + return 0; +} -- cgit v1.2.1