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

int main()
{
  uint8_t myarray[4096];
  memset(myarray, 127, sizeof myarray);
  EM_ASM({
      let cvs = document.getElementById('canvas');
      let ctx = cvs.getContext('2d'); /* XXX why does emcc choke on commas? */
      let ww = cvs.width;
      let hh = cvs.height;
      let ida = ctx.createImageData($2, $3);
      ida.data.set(HEAPU8.subarray($0, $0 + $1));
      console.log('did', ctx.putImageData(ida, 0, 0));
    }, &myarray, sizeof myarray, 32, 32);
  printf("whoa\n");
  return 0;
}