1 #include <stdio.h> 2 #include <stdlib.h> 3 #include "pixman.h" 4 #include "gtk-utils.h" 5 6 int 7 main (int argc, char **argv) 8 { 9 #define WIDTH 400 10 #define HEIGHT 400 11 #define TILE_SIZE 25 12 13 pixman_image_t *checkerboard; 14 pixman_image_t *destination; 15 #define D2F(d) (pixman_double_to_fixed(d)) 16 pixman_transform_t trans = { { 17 { D2F (-1.96830), D2F (-1.82250), D2F (512.12250)}, 18 { D2F (0.00000), D2F (-7.29000), D2F (1458.00000)}, 19 { D2F (0.00000), D2F (-0.00911), D2F (0.59231)}, 20 }}; 21 int i, j; 22 23 checkerboard = pixman_image_create_bits (PIXMAN_a8r8g8b8, 24 WIDTH, HEIGHT, 25 NULL, 0); 26 27 destination = pixman_image_create_bits (PIXMAN_a8r8g8b8, 28 WIDTH, HEIGHT, 29 NULL, 0); 30 31 for (i = 0; i < HEIGHT / TILE_SIZE; ++i) 32 { 33 for (j = 0; j < WIDTH / TILE_SIZE; ++j) 34 { 35 double u = (double)(j + 1) / (WIDTH / TILE_SIZE); 36 double v = (double)(i + 1) / (HEIGHT / TILE_SIZE); 37 pixman_color_t black = { 0, 0, 0, 0xffff }; 38 pixman_color_t white = { 39 v * 0xffff, 40 u * 0xffff, 41 (1 - (double)u) * 0xffff, 42 0xffff }; 43 pixman_color_t *c; 44 pixman_image_t *fill; 45 46 if ((j & 1) != (i & 1)) 47 c = &black; 48 else 49 c = &white; 50 51 fill = pixman_image_create_solid_fill (c); 52 53 pixman_image_composite (PIXMAN_OP_SRC, fill, NULL, checkerboard, 54 0, 0, 0, 0, j * TILE_SIZE, i * TILE_SIZE, 55 TILE_SIZE, TILE_SIZE); 56 } 57 } 58 59 pixman_image_set_transform (checkerboard, &trans); 60 pixman_image_set_filter (checkerboard, PIXMAN_FILTER_BEST, NULL, 0); 61 pixman_image_set_repeat (checkerboard, PIXMAN_REPEAT_NONE); 62 63 pixman_image_composite (PIXMAN_OP_SRC, 64 checkerboard, NULL, destination, 65 0, 0, 0, 0, 0, 0, 66 WIDTH, HEIGHT); 67 68 show_image (destination); 69 70 return 0; 71 } 72
