118 lines
3.0 KiB
C
118 lines
3.0 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include "pixman.h"
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int
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main (int argc, char **argv)
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{
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#define WIDTH 400
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#define HEIGHT 200
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uint32_t *dest = malloc (WIDTH * HEIGHT * 4);
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pixman_image_t *src_img;
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pixman_image_t *dest_img;
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int i, j;
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pixman_gradient_stop_t onestop[1] =
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{
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{ pixman_int_to_fixed (1), { 0xffff, 0xeeee, 0xeeee, 0xeeee } },
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};
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pixman_gradient_stop_t subsetstops[2] =
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{
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{ pixman_int_to_fixed (1), { 0xffff, 0xeeee, 0xeeee, 0xeeee } },
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{ pixman_int_to_fixed (1), { 0xffff, 0xeeee, 0xeeee, 0xeeee } },
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};
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pixman_gradient_stop_t stops01[2] =
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{
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{ pixman_int_to_fixed (0), { 0xffff, 0xeeee, 0xeeee, 0xeeee } },
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{ pixman_int_to_fixed (1), { 0xffff, 0x1111, 0x1111, 0x1111 } }
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};
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pixman_point_fixed_t p1 = { pixman_double_to_fixed (0), 0 };
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pixman_point_fixed_t p2 = { pixman_double_to_fixed (WIDTH / 8.),
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pixman_int_to_fixed (0) };
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#if 0
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pixman_transform_t trans = {
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{ { pixman_double_to_fixed (2), pixman_double_to_fixed (0.5), pixman_double_to_fixed (-100), },
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{ pixman_double_to_fixed (0), pixman_double_to_fixed (3), pixman_double_to_fixed (0), },
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{ pixman_double_to_fixed (0), pixman_double_to_fixed (0.000), pixman_double_to_fixed (1.0) }
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}
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};
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#else
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pixman_transform_t trans = {
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{ { pixman_fixed_1, 0, 0 },
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{ 0, pixman_fixed_1, 0 },
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{ 0, 0, pixman_fixed_1 } }
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};
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#endif
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pixman_point_fixed_t c_inner;
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pixman_point_fixed_t c_outer;
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pixman_fixed_t r_inner;
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pixman_fixed_t r_outer;
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for (i = 0; i < WIDTH * HEIGHT; ++i)
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dest[i] = 0x4f00004f; /* pale blue */
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dest_img = pixman_image_create_bits (PIXMAN_a8r8g8b8,
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WIDTH, HEIGHT,
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dest,
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WIDTH * 4);
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c_inner.x = pixman_double_to_fixed (50.0);
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c_inner.y = pixman_double_to_fixed (50.0);
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c_outer.x = pixman_double_to_fixed (50.0);
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c_outer.y = pixman_double_to_fixed (50.0);
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r_inner = 0;
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r_outer = pixman_double_to_fixed (50.0);
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for (i = 0; i < 3; ++i)
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{
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pixman_gradient_stop_t *stops;
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int num_stops;
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if (i == 0)
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{
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stops = onestop;
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num_stops = sizeof(onestop) / sizeof(onestop[0]);
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}
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else if (i == 1)
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{
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stops = subsetstops;
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num_stops = sizeof(subsetstops) / sizeof(subsetstops[0]);
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}
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else
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{
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stops = stops01;
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num_stops = sizeof(stops01) / sizeof(stops01[0]);
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}
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for (j = 0; j < 3; ++j)
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{
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if (j == 0)
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src_img = pixman_image_create_conical_gradient (&c_inner, r_inner,
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stops, num_stops);
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else if (j == 1)
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src_img = pixman_image_create_radial_gradient (&c_inner, &c_outer,
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r_inner, r_outer,
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stops, num_stops);
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else
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src_img = pixman_image_create_linear_gradient (&p1, &p2,
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stops, num_stops);
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pixman_image_set_transform (src_img, &trans);
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pixman_image_set_repeat (src_img, PIXMAN_REPEAT_NONE);
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pixman_image_composite (PIXMAN_OP_OVER, src_img, NULL, dest_img,
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0, 0, 0, 0, 0, 0, 10 * WIDTH, HEIGHT);
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}
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pixman_image_unref (src_img);
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}
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pixman_image_unref (dest_img);
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free (dest);
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return 0;
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}
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