据说是绘制bimap最快的方法

outputBitmapData.lock();

for(y = 0; y < STAGE_HEIGHT; ++y)

{

  for(x = 0; x < STAGE_WIDTH; ++x)

  {

    r = (t*100 + 255 * x / STAGE_WIDTH)%255;

    g = 180;

    b = 180;

 

    outputBitmapData.setPixel(x, y, (r<<16) + (g<<8) + b);

  }

}

outputBitmapData.unlock();