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#include <stdio.h>
#include <stdlib.h>
#include "pixman.h"
#include "gtk-utils.h"
int
main (int argc, char **argv)
{
#define WIDTH 400
#define HEIGHT 200
uint32_t *alpha = malloc (WIDTH * HEIGHT * 4);
uint32_t *dest = malloc (WIDTH * HEIGHT * 4);
uint32_t *src = malloc (WIDTH * HEIGHT * 4);
pixman_image_t *grad_img;
pixman_image_t *alpha_img;
pixman_image_t *dest_img;
pixman_image_t *src_img;
int i;
pixman_gradient_stop_t stops[2] =
{
{ pixman_int_to_fixed (0), { 0x0000, 0x0000, 0x0000, 0x0000 } },
{ pixman_int_to_fixed (1), { 0xffff, 0x0000, 0x1111, 0xffff } }
};
pixman_point_fixed_t p1 = { pixman_double_to_fixed (0), 0 };
pixman_point_fixed_t p2 = { pixman_double_to_fixed (WIDTH),
pixman_int_to_fixed (0) };
#if 0
pixman_transform_t trans = {
{ { pixman_double_to_fixed (2), pixman_double_to_fixed (0.5), pixman_double_to_fixed (-100), },
{ pixman_double_to_fixed (0), pixman_double_to_fixed (3), pixman_double_to_fixed (0), },
{ pixman_double_to_fixed (0), pixman_double_to_fixed (0.000), pixman_double_to_fixed (1.0) }
}
};
#else
pixman_transform_t trans = {
{ { pixman_fixed_1, 0, 0 },
{ 0, pixman_fixed_1, 0 },
{ 0, 0, pixman_fixed_1 } }
};
#endif
pixman_point_fixed_t c_inner;
pixman_point_fixed_t c_outer;
pixman_fixed_t r_inner;
pixman_fixed_t r_outer;
for (i = 0; i < WIDTH * HEIGHT; ++i)
alpha[i] = 0x4f00004f; /* pale blue */
alpha_img = pixman_image_create_bits (PIXMAN_a8r8g8b8,
WIDTH, HEIGHT,
alpha,
WIDTH * 4);
for (i = 0; i < WIDTH * HEIGHT; ++i)
dest[i] = 0xffffff00; /* yellow */
dest_img = pixman_image_create_bits (PIXMAN_a8r8g8b8,
WIDTH, HEIGHT,
dest,
WIDTH * 4);
for (i = 0; i < WIDTH * HEIGHT; ++i)
src[i] = 0xffff0000;
src_img = pixman_image_create_bits (PIXMAN_a8r8g8b8,
WIDTH, HEIGHT,
src,
WIDTH * 4);
c_inner.x = pixman_double_to_fixed (50.0);
c_inner.y = pixman_double_to_fixed (50.0);
c_outer.x = pixman_double_to_fixed (50.0);
c_outer.y = pixman_double_to_fixed (50.0);
r_inner = 0;
r_outer = pixman_double_to_fixed (50.0);
#if 0
grad_img = pixman_image_create_conical_gradient (&c_inner, r_inner,
stops, 2);
#endif
#if 0
grad_img = pixman_image_create_conical_gradient (&c_inner, r_inner,
stops, 2);
grad_img = pixman_image_create_linear_gradient (&c_inner, &c_outer,
r_inner, r_outer,
stops, 2);
#endif
grad_img = pixman_image_create_linear_gradient (&p1, &p2,
stops, 2);
pixman_image_set_transform (grad_img, &trans);
pixman_image_set_repeat (grad_img, PIXMAN_REPEAT_PAD);
pixman_image_composite (PIXMAN_OP_OVER, grad_img, NULL, alpha_img,
0, 0, 0, 0, 0, 0, 10 * WIDTH, HEIGHT);
pixman_image_set_alpha_map (src_img, alpha_img, 10, 10);
pixman_image_composite (PIXMAN_OP_OVER, src_img, NULL, dest_img,
0, 0, 0, 0, 0, 0, 10 * WIDTH, HEIGHT);
printf ("0, 0: %x\n", dest[0]);
printf ("10, 10: %x\n", dest[10 * 10 + 10]);
printf ("w, h: %x\n", dest[(HEIGHT - 1) * 100 + (WIDTH - 1)]);
show_image (dest_img);
pixman_image_unref (src_img);
pixman_image_unref (grad_img);
pixman_image_unref (alpha_img);
free (dest);
return 0;
}
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