Draw an RGBA pixel at the given coordinates.
setPixel32 updates the underlying texture. If you need to make multiple calls, use BitmapDataUpdateBatch instead.
Source
void setPixel32(num x, num y, int color) {
var updateBatch = new BitmapDataUpdateBatch(this);
updateBatch.setPixel32(x, y, color);
updateBatch.update();
}