| #include <stdio.h> |
| #include <stdlib.h> |
| #include "pixman.h" |
| #include "gtk-utils.h" |
| |
| int |
| main (int argc, char **argv) |
| { |
| #define WIDTH 400 |
| #define HEIGHT 400 |
| #define TILE_SIZE 25 |
| |
| pixman_image_t *checkerboard; |
| pixman_image_t *destination; |
| #define D2F(d) (pixman_double_to_fixed(d)) |
| pixman_transform_t trans = { { |
| { D2F (-1.96830), D2F (-1.82250), D2F (512.12250)}, |
| { D2F (0.00000), D2F (-7.29000), D2F (1458.00000)}, |
| { D2F (0.00000), D2F (-0.00911), D2F (0.59231)}, |
| }}; |
| int i, j; |
| |
| checkerboard = pixman_image_create_bits (PIXMAN_a8r8g8b8, |
| WIDTH, HEIGHT, |
| NULL, 0); |
| |
| destination = pixman_image_create_bits (PIXMAN_a8r8g8b8, |
| WIDTH, HEIGHT, |
| NULL, 0); |
| |
| for (i = 0; i < HEIGHT / TILE_SIZE; ++i) |
| { |
| for (j = 0; j < WIDTH / TILE_SIZE; ++j) |
| { |
| double u = (double)(j + 1) / (WIDTH / TILE_SIZE); |
| double v = (double)(i + 1) / (HEIGHT / TILE_SIZE); |
| pixman_color_t black = { 0, 0, 0, 0xffff }; |
| pixman_color_t white = { |
| v * 0xffff, |
| u * 0xffff, |
| (1 - (double)u) * 0xffff, |
| 0xffff }; |
| pixman_color_t *c; |
| pixman_image_t *fill; |
| |
| if ((j & 1) != (i & 1)) |
| c = &black; |
| else |
| c = &white; |
| |
| fill = pixman_image_create_solid_fill (c); |
| |
| pixman_image_composite (PIXMAN_OP_SRC, fill, NULL, checkerboard, |
| 0, 0, 0, 0, j * TILE_SIZE, i * TILE_SIZE, |
| TILE_SIZE, TILE_SIZE); |
| } |
| } |
| |
| pixman_image_set_transform (checkerboard, &trans); |
| pixman_image_set_filter (checkerboard, PIXMAN_FILTER_BEST, NULL, 0); |
| pixman_image_set_repeat (checkerboard, PIXMAN_REPEAT_NONE); |
| |
| pixman_image_composite (PIXMAN_OP_SRC, |
| checkerboard, NULL, destination, |
| 0, 0, 0, 0, 0, 0, |
| WIDTH, HEIGHT); |
| |
| show_image (destination); |
| |
| return 0; |
| } |