git.mutantstargoat.com Git - cyberay/blob - src/rt.c

   1 #include "rt.h"
   2
   3 struct framebuffer fb;
   4
   5 int fbsize(int width, int height)
   6 {
   7         void *tmp;
   8
   9         if(!(tmp = malloc(width * height * sizeof *fb.pixels))) {
  10                 return -1;
  11         }
  12
  13         free(fb.pixels);
  14         fb.pixels = tmp;
  15         fb.width = width;
  16         fb.height = height;
  17         return 0;
  18 }
  19
  20 void render(void)
  21 {
  22         int i, j;
  23         cgm_vec3 *fbptr = fb.pixels;
  24
  25         for(i=0; i<fb.height; i++) {
  26                 for(j=0; j<fb.width; j++) {
  27                         if(i < 3 || i >= fb.height - 3 || j < 3 || j >= fb.width - 3) {
  28                                 fbptr->x = 1.0f;
  29                                 fbptr->y = fbptr->z = 0.0f;
  30                         } else {
  31                                 fbptr->x = fbptr->z = 0.0f;
  32                                 fbptr->y = 1.0f;
  33                         }
  34                         fbptr++;
  35                 }
  36         }
  37 }