Subversion Repositories openrisc

typedef struct _RenderInfo RenderInfo;
struct _RenderInfo
{
    int y;
    float scaley;
    int src_y;
};
 
static void bar(void) { }
 
static int
render_image_rgb_a (RenderInfo * info)
{
  int y, ye;
  float error;
  float step;
 
  y = info->y;
  ye = 256;
 
  step = 1.0 / info->scaley;
 
  error = y * step;
  error -= ((int) error) - step;
 
  for (; y < ye; y++) {
      if (error >= 1.0) {
	  info->src_y += (int) error;
	  error -= (int) error;
	  bar();
      }
      error += step;
  }
  return info->src_y;
}
 
int main (void)
{
    RenderInfo info;
 
    info.y = 0;
    info.src_y = 0;
    info.scaley = 1.0;
 
    if (render_image_rgb_a(&info) != 256)
       abort ();
    exit(0);
}