IABSD.fr/xenocara/lib/pixman/demos/gradient-test.c

Branch : - branch - master - tag -

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  Commit

• Author : matthieu
  Date : 2012-08-17 16:15:20
  Hash : 5c94d108
  Message : Update to pixman 0.26.2. tested at least by ajacoutot@, mpi@, shadchin@.

• lib/pixman/demos/gradient-test.c

• #include <stdio.h>
  #include <stdlib.h>
  #include "pixman.h"
  #include "gtk-utils.h"
  
  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;
      pixman_gradient_stop_t stops[2] =
  	{
  	    { pixman_int_to_fixed (0), { 0x0000, 0x0000, 0xffff, 0xffff } },
  	    { pixman_int_to_fixed (1), { 0xffff, 0x1111, 0x1111, 0xffff } }
  	};
      pixman_point_fixed_t p1 = { pixman_double_to_fixed (50), 0 };
      pixman_point_fixed_t p2 = { pixman_double_to_fixed (200), 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
  
  #if 0
      pixman_point_fixed_t c_inner;
      pixman_point_fixed_t c_outer;
      pixman_fixed_t r_inner;
      pixman_fixed_t r_outer;
  #endif
      
      for (i = 0; i < WIDTH * HEIGHT; ++i)
  	dest[i] = 0xff00ff00;
      
      dest_img = pixman_image_create_bits (PIXMAN_a8r8g8b8,
  					 WIDTH, HEIGHT, 
  					 dest,
  					 WIDTH * 4);
  
  #if 0
      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);
      
      src_img = pixman_image_create_conical_gradient (&c_inner, r_inner,
  						    stops, 2);
  #endif
  #if 0
      src_img = pixman_image_create_conical_gradient (&c_inner, r_inner,
  						    stops, 2);
      src_img = pixman_image_create_linear_gradient (&c_inner, &c_outer,
  						   r_inner, r_outer,
  						   stops, 2);
  #endif
      
      src_img = pixman_image_create_linear_gradient  (&p1, &p2,
  						    stops, 2);
      
      pixman_image_set_transform (src_img, &trans);
      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);
      
      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 (dest_img);
      free (dest);
      
      return 0;
  }