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#include "../test/utils.h"
#include "gtk-utils.h"
#define SIZE 128
#define GRADIENTS_PER_ROW 7
#define NUM_ROWS ((NUM_GRADIENTS + GRADIENTS_PER_ROW - 1) / GRADIENTS_PER_ROW)
#define WIDTH (SIZE * GRADIENTS_PER_ROW)
#define HEIGHT (SIZE * NUM_ROWS)
#define NUM_GRADIENTS 35
#define double_to_color(x) \
(((uint32_t) ((x)*65536)) - (((uint32_t) ((x)*65536)) >> 16))
#define PIXMAN_STOP(offset,r,g,b,a) \
{ pixman_double_to_fixed (offset), \
{ \
double_to_color (r), \
double_to_color (g), \
double_to_color (b), \
double_to_color (a) \
} \
}
static const pixman_gradient_stop_t stops[] = {
PIXMAN_STOP (0.25, 1, 0, 0, 0.7),
PIXMAN_STOP (0.5, 1, 1, 0, 0.7),
PIXMAN_STOP (0.75, 0, 1, 0, 0.7),
PIXMAN_STOP (1.0, 0, 0, 1, 0.7)
};
#define NUM_STOPS (sizeof (stops) / sizeof (stops[0]))
static pixman_image_t *
create_conical (int index)
{
pixman_point_fixed_t c;
double angle;
c.x = pixman_double_to_fixed (0);
c.y = pixman_double_to_fixed (0);
angle = (0.5 / NUM_GRADIENTS + index / (double)NUM_GRADIENTS) * 720 - 180;
return pixman_image_create_conical_gradient (
&c, pixman_double_to_fixed (angle), stops, NUM_STOPS);
}
int
main (int argc, char **argv)
{
pixman_transform_t transform;
pixman_image_t *src_img, *dest_img;
int i;
enable_divbyzero_exceptions ();
dest_img = pixman_image_create_bits (PIXMAN_a8r8g8b8,
WIDTH, HEIGHT,
NULL, 0);
draw_checkerboard (dest_img, 25, 0xffaaaaaa, 0xff888888);
pixman_transform_init_identity (&transform);
pixman_transform_translate (NULL, &transform,
pixman_double_to_fixed (0.5),
pixman_double_to_fixed (0.5));
pixman_transform_scale (NULL, &transform,
pixman_double_to_fixed (SIZE),
pixman_double_to_fixed (SIZE));
pixman_transform_translate (NULL, &transform,
pixman_double_to_fixed (0.5),
pixman_double_to_fixed (0.5));
for (i = 0; i < NUM_GRADIENTS; i++)
{
int column = i % GRADIENTS_PER_ROW;
int row = i / GRADIENTS_PER_ROW;
src_img = create_conical (i);
pixman_image_set_repeat (src_img, PIXMAN_REPEAT_NORMAL);
pixman_image_set_transform (src_img, &transform);
pixman_image_composite32 (
PIXMAN_OP_OVER, src_img, NULL,dest_img,
0, 0, 0, 0, column * SIZE, row * SIZE,
SIZE, SIZE);
pixman_image_unref (src_img);
}
show_image (dest_img);
pixman_image_unref (dest_img);
return 0;
}
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