GameBoy\LcdController::notifyScanline PHP Метод

    public function notifyScanline()
    {
        if ($this->actualScanLine == 0) {
            $this->core->windowSourceLine = 0;
        }
        // determine the left edge of the window (160 if window is inactive)
        $windowLeft = $this->core->gfxWindowDisplay && $this->core->memory[0xff4a] <= $this->actualScanLine ? min(160, $this->core->memory[0xff4b] - 7) : 160;
        // step 1: background+window
        $skippedAnything = $this->core->drawBackgroundForLine($this->actualScanLine, $windowLeft, 0);
        // At this point, the high (alpha) byte in the frameBuffer is 0xff for colors 1,2,3 and
        // 0x00 for color 0. Foreground sprites draw on all colors, background sprites draw on
        // top of color 0 only.
        // step 2: sprites
        $this->core->drawSpritesForLine($this->actualScanLine);
        // step 3: prio tiles+window
        if ($skippedAnything) {
            $this->core->drawBackgroundForLine($this->actualScanLine, $windowLeft, 0x80);
        }
        if ($windowLeft < 160) {
            ++$this->core->windowSourceLine;
        }
    }