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php用gd2图形库来画图

  • Posted on April 16, 2010 at 8:45 am
$font = $_SERVER['DOCUMENT_ROOT']."/simfang.ttf";
$font_size=30;
$angle = 0;
$x = 0;
$y = 0+$font_size;
$dest_file = "/tmp/a.png";
 
$delta = $font_size*2/3;
$text = trim($_GET['t']);
 
	$len = strlen($text);
	$height = 30;
	$width = $len * $delta;
	//$im = imagecreate($width,$height);  //gd库
	$im = imagecreatetruecolor($width, $height); //gd2库
	$white = imagecolorallocate($im,0xFF,0xFF,0xFF);
	$black = imagecolorallocate($im,0x00,0x00,0x00);
        imagefill($im, 0, 0, $white); //纯白背景。
	//imagecolortransparent($im,$white);  //imagecolortransparent() 设置具体某种颜色为透明色
	//imagefilledrectangle($im,50,50,150,150,$black);
	//imagestring($im,5,0,0,"happy every day",$black); //这里的5不是font_size. 而是一种字体。
	$ok=imagettftext($im,$font_size,$angle,$x,$y,$black,$font,$text);  //这里的x 和 y 是头文字左下角的坐标（与imagestring里面的x和y不同）
	header("Content-type:image/png");
	imagepng($im, $dest_file); //输出到文件
	imagepng($im); //标准输出
	imagedestroy($im);

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