/* Simple paint program. */

#include <string.h>
#include <stdint.h>

#include "xshmu.h"

int main()
{
  xshmu_pic img = xshmu_canvas(1024, 1024);
  memset(img.p, -1, img.w * img.h * 4);  // Clear canvas to white
  xshmu w = xshmu_open("micropaint", img.w, img.h, "");

  for (;;) {
    xshmu_wait(w);    // Wait for user input
    for (xshmu_event *ev; (ev = xshmu_get_event(w));) {  // Process all waiting user input
      xshmu_mouse_event *m = xshmu_as_mouse_event(ev);
      if (m) {  // if it was a mouse event:
        if (m->x < 0 || m->x >= img.w || m->y < 0 || m->y >= img.h) continue;
        if (m->buttons) *xshmu_pix(img, m->x, m->y) = m->buttons & 1 ? 0 : -1;
      }
    }

    xshmu_copy(xshmu_framebuffer(w), img);
    xshmu_flush(w);  // Update the window, as in munching squares demo
  }
}