BarcodeGenerator::linear_render_image

private function linear_render_image(
	$image, $code, $x, $y, $w, $h, $colors, $widths, $options
) {
	$textheight = (isset($options['th']) ? (int)$options['th'] : 10);
	$textsize = (isset($options['ts']) ? (int)$options['ts'] : 1);
	$textcolor = (isset($options['tc']) ? $options['tc'] : '000');
	$textcolor = $this->allocate_color($image, $textcolor);
	$width = 0;
	foreach ($code['b'] as $block) {
		foreach ($block['m'] as $module) {
			$width += $module[1] * $widths[$module[2]];
		}
	}
	if ($width) {
		$scale = $w / $width;
		$scale = (($scale > 1) ? floor($scale) : 1);
		$x = floor($x + ($w - $width * $scale) / 2);
	} else {
		$scale = 1;
		$x = floor($x + $w / 2);
	}
	foreach ($code['b'] as $block) {
		if (isset($block['l'])) {
			$label = $block['l'][0];
			$ly = (isset($block['l'][1]) ? (float)$block['l'][1] : 1);
			$lx = (isset($block['l'][2]) ? (float)$block['l'][2] : 0.5);
			$my = round($y + min($h, $h + ($ly - 1) * $textheight));
			$ly = ($y + $h + $ly * $textheight);
			$ly = round($ly - imagefontheight($textsize));
		} else {
			$label = null;
			$my = $y + $h;
		}
		$mx = $x;
		foreach ($block['m'] as $module) {
			$mc = $colors[$module[0]];
			$mw = $mx + $module[1] * $widths[$module[2]] * $scale;
			imagefilledrectangle($image, $mx, $y, $mw - 1, $my - 1, $mc);
			$mx = $mw;
		}
		if (!is_null($label)) {
			$lx = ($x + ($mx - $x) * $lx);
			$lw = imagefontwidth($textsize) * strlen($label);
			$lx = round($lx - $lw / 2);
			imagestring($image, $textsize, $lx, $ly, $label, $textcolor);
		}
		$x = $mx;
	}
}