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

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  Commit

• Author : matthieu
  Date : 2011-07-24 13:05:47
  Hash : 0def8ce1
  Message : Update to pixman 0.22.2. 0.22.0 was tested by many. 0.22.2 only add a few bug fixes. Note that on amd64 a recent ld.so is needed to avoid random bus errors.

• lib/pixman/demos/convolution-test.c

• #include <stdio.h>
  #include <stdlib.h>
  #include "pixman.h"
  #include "gtk-utils.h"
  
  int
  main (int argc, char **argv)
  {
  #define WIDTH 200
  #define HEIGHT 200
  
  #define d2f pixman_double_to_fixed
      
      uint32_t *src = malloc (WIDTH * HEIGHT * 4);
      uint32_t *mask = malloc (WIDTH * HEIGHT * 4);
      uint32_t *dest = malloc (WIDTH * HEIGHT * 4);
      pixman_fixed_t convolution[] =
      {
  	d2f (3), d2f (3),
  	d2f (0.5), d2f (0.5), d2f (0.5),
  	d2f (0.5), d2f (0.5), d2f (0.5),
  	d2f (0.5), d2f (0.5), d2f (0.5),
      };
      pixman_image_t *simg, *mimg, *dimg;
  
      int i;
  
      for (i = 0; i < WIDTH * HEIGHT; ++i)
      {
  	src[i] = 0x7f007f00;
  	mask[i] = (i % 256) * 0x01000000;
  	dest[i] = 0;
      }
  
      simg = pixman_image_create_bits (PIXMAN_a8r8g8b8, WIDTH, HEIGHT, src, WIDTH * 4);
      mimg = pixman_image_create_bits (PIXMAN_a8r8g8b8, WIDTH, HEIGHT, mask, WIDTH * 4);
      dimg = pixman_image_create_bits (PIXMAN_a8r8g8b8, WIDTH, HEIGHT, dest, WIDTH * 4);
  
      pixman_image_set_filter (mimg, PIXMAN_FILTER_CONVOLUTION,
  			     convolution, 11);
  
      pixman_image_composite (PIXMAN_OP_OVER, simg, mimg, dimg, 0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
  
      show_image (dimg);
      
      return 0;
  }