Discuz中使用imagemagick给图片打文字水印的代码

本文链接：https://blog.youkuaiyun.com/zhenelse/article/details/6772100

本文介绍了如何在Discuz论坛系统中利用imagemagick库，通过class_image.php类文件为上传的图片添加文字水印，实现论坛图片版权保护的功能。

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class_image.php

			$watermarktextcvt = str_replace(array("\n", "\r", "'"), array('', '', '\''), pack("H*", $this->param['watermarktext']['text'][$type]));
			$angle = -$this->param['watermarktext']['angle'][$type];
			$translate = $this->param['watermarktext']['translatex'][$type] || $this->param['watermarktext']['translatey'][$type] ? ' translate '.$this->param['watermarktext']['translatex'][$type].','.$this->param['watermarktext']['translatey'][$type] : '';
			$skewX = $this->param['watermarktext']['skewx'][$type] ? ' skewX '.$this->param['watermarktext']['skewx'][$type] : '';
			$skewY = $this->param['watermarktext']['skewy'][$type] ? ' skewY '.$this->param['watermarktext']['skewy'][$type] : '';
			$exec_str = $this->param['imageimpath'].'/convert'.
				' -quality '.$this->param['watermarkquality'][$type].
				' -font "'.$this->param['watermarktext']['fontpath'][$type].'"'.
				' -pointsize '.$this->param['watermarktext']['size'][$type].
				(($this->param['watermarktext']['shadowx'][$type] || $this->param['watermarktext']['shadowy'][$type]) && $this->param['watermarktext']['shadowcolor'][$type] ?
					' -fill "rgb('.$this->param['watermarktext']['shadowcolor'][$type].')"'.
					' -draw "'.
						' gravity '.$gravity.$translate.$skewX.$skewY.
						' rotate '.$angle.
						' text '.$this->param['watermarktext']['shadowx'][$type].','.$this->param['watermarktext']['shadowy'][$type].' \''.$watermarktextcvt.'\'"' : '').
				' -fill "rgb('.$this->param['watermarktext']['color'][$type].')"'.
				' -draw "'.
					' gravity '.$gravity.$translate.$skewX.$skewY.
					' rotate '.$angle.
					' text 0,0 \''.$watermarktextcvt.'\'"'.
				' '.$this->source.' '.$this->target;