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

Branch : - branch - master - tag -

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  Commit

• Author : matthieu
  Date : 2025-08-12 16:39:28
  Hash : 81405b23
  Message : Update to pixman 0.46.4. tested in a bulk ports build and ok jca@ runs of the tests on differents by gkoeler@, jca@ and others.

• lib/pixman/demos/linear-gradient.c

• #include "utils.h"
  #include "gtk-utils.h"
  
  #define WIDTH 1024
  #define HEIGHT 640
  
  int
  main (int argc, char **argv)
  {
      pixman_image_t *src_img, *dest_img;
      pixman_gradient_stop_t stops[] = {
          { 0x00000, { 0x0000, 0x0000, 0x4444, 0xdddd } },
          { 0x10000, { 0xeeee, 0xeeee, 0x8888, 0xdddd } },
  #if 0
          /* These colors make it very obvious that dithering
           * is useful even for 8-bit gradients
           */
  	{ 0x00000, { 0x6666, 0x3333, 0x3333, 0xffff } },
  	{ 0x10000, { 0x3333, 0x6666, 0x6666, 0xffff } },
  #endif
      };
      pixman_point_fixed_t p1, p2;
  
      enable_divbyzero_exceptions ();
  
      dest_img = pixman_image_create_bits (PIXMAN_x8r8g8b8,
  					 WIDTH, HEIGHT,
  					 NULL, 0);
  
      p1.x = p1.y = 0x0000;
      p2.x = WIDTH << 16;
      p2.y = HEIGHT << 16;
      
      src_img = pixman_image_create_linear_gradient (&p1, &p2, stops, ARRAY_LENGTH (stops));
  
      pixman_image_composite32 (PIXMAN_OP_OVER,
  			      src_img,
  			      NULL,
  			      dest_img,
  			      0, 0,
  			      0, 0,
  			      0, 0,
  			      WIDTH, HEIGHT);
  
      show_image (dest_img);
  
      pixman_image_unref (dest_img);
  
      return 0;
  }