+++ /dev/null
-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);
-}