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

Branch : - branch - master - tag -

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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/clip-test.c

• #include <stdio.h>
  #include <stdlib.h>
  #include "pixman.h"
  #include "gtk-utils.h"
  
  #define WIDTH 200
  #define HEIGHT 200
      
  static pixman_image_t *
  create_solid_bits (uint32_t pixel)
  {
      uint32_t *pixels = malloc (WIDTH * HEIGHT * 4);
      int i;
      
      for (i = 0; i < WIDTH * HEIGHT; ++i)
  	pixels[i] = pixel;
  
      return pixman_image_create_bits (PIXMAN_a8r8g8b8,
  				     WIDTH, HEIGHT, 
  				     pixels,
  				     WIDTH * 4);
  }
  
  int
  main (int argc, char **argv)
  {
      pixman_image_t *gradient_img;
      pixman_image_t *src_img, *dst_img;
      pixman_gradient_stop_t stops[2] =
  	{
  	    { pixman_int_to_fixed (0), { 0xffff, 0x0000, 0x0000, 0xffff } },
  	    { pixman_int_to_fixed (1), { 0xffff, 0xffff, 0x0000, 0xffff } }
  	};
  #if 0
      pixman_point_fixed_t p1 = { 0, 0 };
      pixman_point_fixed_t p2 = { pixman_int_to_fixed (WIDTH),
  				pixman_int_to_fixed (HEIGHT) };
  #endif
      pixman_point_fixed_t c_inner;
      pixman_point_fixed_t c_outer;
      pixman_fixed_t r_inner;
      pixman_fixed_t r_outer;
      pixman_region32_t clip_region;
      pixman_transform_t trans = {
  	{ { pixman_double_to_fixed (1.3), pixman_double_to_fixed (0), pixman_double_to_fixed (-0.5), },
  	  { pixman_double_to_fixed (0), pixman_double_to_fixed (1), pixman_double_to_fixed (-0.5), },
  	  { pixman_double_to_fixed (0), pixman_double_to_fixed (0), pixman_double_to_fixed (1.0) } 
  	}
      };
      
      src_img = create_solid_bits (0xff0000ff);
      
      c_inner.x = pixman_double_to_fixed (100.0);
      c_inner.y = pixman_double_to_fixed (100.0);
      c_outer.x = pixman_double_to_fixed (100.0);
      c_outer.y = pixman_double_to_fixed (100.0);
      r_inner = 0;
      r_outer = pixman_double_to_fixed (100.0);
      
      gradient_img = pixman_image_create_radial_gradient (&c_inner, &c_outer,
  							r_inner, r_outer,
  							stops, 2);
  
  #if 0
      gradient_img = pixman_image_create_linear_gradient  (&p1, &p2,
  							 stops, 2);
      
  #endif
  
      pixman_image_composite (PIXMAN_OP_OVER, gradient_img, NULL, src_img,
  			    0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
      
      pixman_region32_init_rect (&clip_region, 50, 0, 100, 200);
      pixman_image_set_clip_region32 (src_img, &clip_region);
      pixman_image_set_source_clipping (src_img, TRUE);
      pixman_image_set_has_client_clip (src_img, TRUE);
      pixman_image_set_transform (src_img, &trans);
      pixman_image_set_repeat (src_img, PIXMAN_REPEAT_NORMAL);
      
      dst_img = create_solid_bits (0xffff0000);
      pixman_image_composite (PIXMAN_OP_OVER, src_img, NULL, dst_img,
  			    0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
      
  
  #if 0
      printf ("0, 0: %x\n", src[0]);
      printf ("10, 10: %x\n", src[10 * 10 + 10]);
      printf ("w, h: %x\n", src[(HEIGHT - 1) * 100 + (WIDTH - 1)]);
  #endif
      
      show_image (dst_img);
      
      pixman_image_unref (gradient_img);
      pixman_image_unref (src_img);
      
      return 0;
  }