1 #include "../test/utils.h" 2 #include "gtk-utils.h" 3 4 #define SIZE 128 5 #define GRADIENTS_PER_ROW 7 6 #define NUM_ROWS ((NUM_GRADIENTS + GRADIENTS_PER_ROW - 1) / GRADIENTS_PER_ROW) 7 #define WIDTH (SIZE * GRADIENTS_PER_ROW) 8 #define HEIGHT (SIZE * NUM_ROWS) 9 #define NUM_GRADIENTS 35 10 11 #define double_to_color(x) \ 12 (((uint32_t) ((x)*65536)) - (((uint32_t) ((x)*65536)) >> 16)) 13 14 #define PIXMAN_STOP(offset,r,g,b,a) \ 15 { pixman_double_to_fixed (offset), \ 16 { \ 17 double_to_color (r), \ 18 double_to_color (g), \ 19 double_to_color (b), \ 20 double_to_color (a) \ 21 } \ 22 } 23 24 25 static const pixman_gradient_stop_t stops[] = { 26 PIXMAN_STOP (0.25, 1, 0, 0, 0.7), 27 PIXMAN_STOP (0.5, 1, 1, 0, 0.7), 28 PIXMAN_STOP (0.75, 0, 1, 0, 0.7), 29 PIXMAN_STOP (1.0, 0, 0, 1, 0.7) 30 }; 31 32 #define NUM_STOPS (sizeof (stops) / sizeof (stops[0])) 33 34 static pixman_image_t * 35 create_conical (int index) 36 { 37 pixman_point_fixed_t c; 38 double angle; 39 40 c.x = pixman_double_to_fixed (0); 41 c.y = pixman_double_to_fixed (0); 42 43 angle = (0.5 / NUM_GRADIENTS + index / (double)NUM_GRADIENTS) * 720 - 180; 44 45 return pixman_image_create_conical_gradient ( 46 &c, pixman_double_to_fixed (angle), stops, NUM_STOPS); 47 } 48 49 int 50 main (int argc, char **argv) 51 { 52 pixman_transform_t transform; 53 pixman_image_t *src_img, *dest_img; 54 int i; 55 56 enable_divbyzero_exceptions (); 57 58 dest_img = pixman_image_create_bits (PIXMAN_a8r8g8b8, 59 WIDTH, HEIGHT, 60 NULL, 0); 61 62 draw_checkerboard (dest_img, 25, 0xffaaaaaa, 0xff888888); 63 64 pixman_transform_init_identity (&transform); 65 66 pixman_transform_translate (NULL, &transform, 67 pixman_double_to_fixed (0.5), 68 pixman_double_to_fixed (0.5)); 69 70 pixman_transform_scale (NULL, &transform, 71 pixman_double_to_fixed (SIZE), 72 pixman_double_to_fixed (SIZE)); 73 pixman_transform_translate (NULL, &transform, 74 pixman_double_to_fixed (0.5), 75 pixman_double_to_fixed (0.5)); 76 77 for (i = 0; i < NUM_GRADIENTS; i++) 78 { 79 int column = i % GRADIENTS_PER_ROW; 80 int row = i / GRADIENTS_PER_ROW; 81 82 src_img = create_conical (i); 83 pixman_image_set_repeat (src_img, PIXMAN_REPEAT_NORMAL); 84 85 pixman_image_set_transform (src_img, &transform); 86 87 pixman_image_composite32 ( 88 PIXMAN_OP_OVER, src_img, NULL,dest_img, 89 0, 0, 0, 0, column * SIZE, row * SIZE, 90 SIZE, SIZE); 91 92 pixman_image_unref (src_img); 93 } 94 95 show_image (dest_img); 96 97 pixman_image_unref (dest_img); 98 99 return 0; 100 } 101
