static pixman_image_t * create_conical_gradient_image (PictGradient *gradient) { PictConicalGradient *conical = (PictConicalGradient *)gradient; pixman_point_fixed_t center; center.x = conical->center.x; center.y = conical->center.y; return pixman_image_create_conical_gradient ( ¢er, conical->angle, (pixman_gradient_stop_t *)gradient->stops, gradient->nstops); }
int main (int argc, char **argv) { #define WIDTH 400 #define HEIGHT 200 uint32_t *dest = malloc (WIDTH * HEIGHT * 4); pixman_image_t *src_img; pixman_image_t *dest_img; int i, j, k, p; typedef struct { pixman_point_fixed_t p0; pixman_point_fixed_t p1; } point_pair_t; pixman_gradient_stop_t onestop[1] = { { pixman_int_to_fixed (1), { 0xffff, 0xeeee, 0xeeee, 0xeeee } }, }; pixman_gradient_stop_t subsetstops[2] = { { pixman_int_to_fixed (1), { 0xffff, 0xeeee, 0xeeee, 0xeeee } }, { pixman_int_to_fixed (1), { 0xffff, 0xeeee, 0xeeee, 0xeeee } }, }; pixman_gradient_stop_t stops01[2] = { { pixman_int_to_fixed (0), { 0xffff, 0xeeee, 0xeeee, 0xeeee } }, { pixman_int_to_fixed (1), { 0xffff, 0x1111, 0x1111, 0x1111 } } }; point_pair_t point_pairs [] = { { { pixman_double_to_fixed (0), 0 }, { pixman_double_to_fixed (WIDTH / 8.), pixman_int_to_fixed (0) } }, { { pixman_double_to_fixed (WIDTH / 2.0), pixman_double_to_fixed (HEIGHT / 2.0) }, { pixman_double_to_fixed (WIDTH / 2.0), pixman_double_to_fixed (HEIGHT / 2.0) } } }; pixman_transform_t transformations[] = { { { { pixman_double_to_fixed (2), pixman_double_to_fixed (0.5), pixman_double_to_fixed (-100), }, { pixman_double_to_fixed (0), pixman_double_to_fixed (3), pixman_double_to_fixed (0), }, { pixman_double_to_fixed (0), pixman_double_to_fixed (0.000), pixman_double_to_fixed (1.0) } } }, { { { pixman_double_to_fixed (1), pixman_double_to_fixed (0), pixman_double_to_fixed (0), }, { pixman_double_to_fixed (0), pixman_double_to_fixed (1), pixman_double_to_fixed (0), }, { pixman_double_to_fixed (0), pixman_double_to_fixed (0.000), pixman_double_to_fixed (1.0) } } }, { { { pixman_double_to_fixed (2), pixman_double_to_fixed (1), pixman_double_to_fixed (0), }, { pixman_double_to_fixed (1), pixman_double_to_fixed (1), pixman_double_to_fixed (0), }, { pixman_double_to_fixed (2), pixman_double_to_fixed (1.000), pixman_double_to_fixed (1.0) } } }, { { { pixman_double_to_fixed (2), pixman_double_to_fixed (1), pixman_double_to_fixed (0), }, { pixman_double_to_fixed (1), pixman_double_to_fixed (1), pixman_double_to_fixed (0), }, { pixman_double_to_fixed (0), pixman_double_to_fixed (0), pixman_double_to_fixed (0) } } }, { { { pixman_double_to_fixed (2), pixman_double_to_fixed (1), pixman_double_to_fixed (0), }, { pixman_double_to_fixed (1), pixman_double_to_fixed (1), pixman_double_to_fixed (0), }, { pixman_double_to_fixed (2), pixman_double_to_fixed (-1), pixman_double_to_fixed (0) } } }, { { { pixman_double_to_fixed (2), pixman_double_to_fixed (1), pixman_double_to_fixed (3), }, { pixman_double_to_fixed (1), pixman_double_to_fixed (1), pixman_double_to_fixed (0), }, { pixman_double_to_fixed (2), pixman_double_to_fixed (-1), pixman_double_to_fixed (0) } } }, }; pixman_fixed_t r_inner; pixman_fixed_t r_outer; enable_divbyzero_exceptions(); for (i = 0; i < WIDTH * HEIGHT; ++i) dest[i] = 0x4f00004f; /* pale blue */ dest_img = pixman_image_create_bits (PIXMAN_a8r8g8b8, WIDTH, HEIGHT, dest, WIDTH * 4); r_inner = 0; r_outer = pixman_double_to_fixed (50.0); for (i = 0; i < 3; ++i) { pixman_gradient_stop_t *stops; int num_stops; if (i == 0) { stops = onestop; num_stops = ARRAY_LENGTH (onestop); } else if (i == 1) { stops = subsetstops; num_stops = ARRAY_LENGTH (subsetstops); } else { stops = stops01; num_stops = ARRAY_LENGTH (stops01); } for (j = 0; j < 3; ++j) { for (p = 0; p < ARRAY_LENGTH (point_pairs); ++p) { point_pair_t *pair = &(point_pairs[p]); if (j == 0) src_img = pixman_image_create_conical_gradient (&(pair->p0), r_inner, stops, num_stops); else if (j == 1) src_img = pixman_image_create_radial_gradient (&(pair->p0), &(pair->p1), r_inner, r_outer, stops, num_stops); else src_img = pixman_image_create_linear_gradient (&(pair->p0), &(pair->p1), stops, num_stops); for (k = 0; k < ARRAY_LENGTH (transformations); ++k) { pixman_image_set_transform (src_img, &transformations[k]); pixman_image_set_repeat (src_img, PIXMAN_REPEAT_NONE); pixman_image_composite (PIXMAN_OP_OVER, src_img, NULL, dest_img, 0, 0, 0, 0, 0, 0, 10 * WIDTH, HEIGHT); } pixman_image_unref (src_img); } } } pixman_image_unref (dest_img); free (dest); return 0; }
int main (int argc, char **argv) { #define WIDTH 400 #define HEIGHT 200 uint32_t *alpha = malloc (WIDTH * HEIGHT * 4); uint32_t *dest = malloc (WIDTH * HEIGHT * 4); uint32_t *src = malloc (WIDTH * HEIGHT * 4); pixman_image_t *grad_img; pixman_image_t *alpha_img; pixman_image_t *dest_img; pixman_image_t *src_img; int i; pixman_gradient_stop_t stops[2] = { { pixman_int_to_fixed (0), { 0x0000, 0x0000, 0x0000, 0x0000 } }, { pixman_int_to_fixed (1), { 0xffff, 0x0000, 0x1111, 0xffff } } }; pixman_point_fixed_t p1 = { pixman_double_to_fixed (0), 0 }; pixman_point_fixed_t p2 = { pixman_double_to_fixed (WIDTH), pixman_int_to_fixed (0) }; #if 0 pixman_transform_t trans = { { { pixman_double_to_fixed (2), pixman_double_to_fixed (0.5), pixman_double_to_fixed (-100), }, { pixman_double_to_fixed (0), pixman_double_to_fixed (3), pixman_double_to_fixed (0), }, { pixman_double_to_fixed (0), pixman_double_to_fixed (0.000), pixman_double_to_fixed (1.0) } } }; #else pixman_transform_t trans = { { { pixman_fixed_1, 0, 0 }, { 0, pixman_fixed_1, 0 }, { 0, 0, pixman_fixed_1 } } }; #endif pixman_point_fixed_t c_inner; pixman_point_fixed_t c_outer; pixman_fixed_t r_inner; pixman_fixed_t r_outer; for (i = 0; i < WIDTH * HEIGHT; ++i) alpha[i] = 0x4f00004f; /* pale blue */ alpha_img = pixman_image_create_bits (PIXMAN_a8r8g8b8, WIDTH, HEIGHT, alpha, WIDTH * 4); for (i = 0; i < WIDTH * HEIGHT; ++i) dest[i] = 0xffffff00; /* yellow */ dest_img = pixman_image_create_bits (PIXMAN_a8r8g8b8, WIDTH, HEIGHT, dest, WIDTH * 4); for (i = 0; i < WIDTH * HEIGHT; ++i) src[i] = 0xffff0000; src_img = pixman_image_create_bits (PIXMAN_a8r8g8b8, WIDTH, HEIGHT, src, WIDTH * 4); c_inner.x = pixman_double_to_fixed (50.0); c_inner.y = pixman_double_to_fixed (50.0); c_outer.x = pixman_double_to_fixed (50.0); c_outer.y = pixman_double_to_fixed (50.0); r_inner = 0; r_outer = pixman_double_to_fixed (50.0); #if 0 grad_img = pixman_image_create_conical_gradient (&c_inner, r_inner, stops, 2); #endif #if 0 grad_img = pixman_image_create_conical_gradient (&c_inner, r_inner, stops, 2); grad_img = pixman_image_create_linear_gradient (&c_inner, &c_outer, r_inner, r_outer, stops, 2); #endif grad_img = pixman_image_create_linear_gradient (&p1, &p2, stops, 2); pixman_image_set_transform (grad_img, &trans); pixman_image_set_repeat (grad_img, PIXMAN_REPEAT_PAD); pixman_image_composite (PIXMAN_OP_OVER, grad_img, NULL, alpha_img, 0, 0, 0, 0, 0, 0, 10 * WIDTH, HEIGHT); pixman_image_set_alpha_map (src_img, alpha_img, 10, 10); pixman_image_composite (PIXMAN_OP_OVER, src_img, NULL, dest_img, 0, 0, 0, 0, 0, 0, 10 * WIDTH, HEIGHT); printf ("0, 0: %x\n", dest[0]); printf ("10, 10: %x\n", dest[10 * 10 + 10]); printf ("w, h: %x\n", dest[(HEIGHT - 1) * 100 + (WIDTH - 1)]); show_image (dest_img); pixman_image_unref (src_img); pixman_image_unref (grad_img); pixman_image_unref (alpha_img); free (dest); return 0; }