PHP：GD库 图片水印处理

文章来源:http://www.cnblogs.com/hello-tl/p/7592974.html

<?php
/**
 * 处理图片类
 * 1.添加文字水印
 * 2.添加图片水印
 * 3.压缩图片
 */
class TL_Image{
        private $image;//内存中的图片
        private $info;//图片的基本信息
        /**
         * 打开一张图片，读取到内存
         * @param [type] $src [description] 图片路径
         */
        public function __construct($src){
                $info = getimagesize($src);
                $this->info = array(
                        'width' => $info[0],
                        'height' => $info[1],
                        'type' => image_type_to_extension($info['2'],false),
                        'mime' => $info['mime'],
                );
                $fun = "imagecreatefrom{$this->info['type']}";
                $this->image = $fun($src);
        }
        /**
         * 操作图片(压缩)
         * @param  [type] $width  [description] 宽
         * @param  [type] $height [description] 高
         * @return [type]         [description]
         */
        public function thumb($width,$height){
                $image_thumb = imagecreatetruecolor($width,$height);
                imagecopyresampled($image_thumb, $this->image, 0, 0, 0, 0, $width, $height, $this->info['width'], $this->info['height']);
                imagedestroy($this->image);
                $this->image = $image_thumb;
        }
        /**
         * 操作图片(添加文字水印)
         * [fontMark description]
         * @param  [type] $content  [description] 设置文字
         * @param  [type] $font_url [description] 字体文件路径
         * @param  [type] $size     [description] 字体大小
         * @param  [type] $color    [description] 字体颜色 []
         * @param  [type] $local    [description] 位置 []
         * @param  [type] $angle    [description] 旋转
         * @return [type]           [description]
         */
        public function fontMark($content,$font_url,$size,$color,$local,$angle){
                $col = imagecolorallocatealpha($this->image,$color[0],$color[1],$color[2],$color[3]);
                imagettftext($this->image, $size, $angle, $local['x'], $local['y'], $col, $font_url, $content);
        }
        /**
         * 操作图片(添加图片水印)
         * @param  [type] $source [description] 水印图片路径
         * @param  [type] $local  [description] 位置 []
         * @param  [type] $alpha  [description] 透明
         * @return [type]         [description] 
         */
        public function imageMark($source,$local,$alpha){
                $info2 = getimagesize($source);
                $type2 = image_type_to_extension($info2[2],false);
                $fun2 = "imagecreatefrom{$type2}";
                $water = $fun2($source);
                imagecopymerge($this->image, $water,  $local['x'],  $local['y'], 0, 0, $info2[0], $info2[1], $alpha);
                imagedestroy($water);
        }
        /**
         * 浏览器输出图片
         */
        public function show(){
                header("Content-Type:" . $this->info['mime']);
                $funs = "image{$this->info['type']}";
                $funs($this->image);
        }
        /**
         * 保存图片
         * @param  [type] $newname [description] 保存之后的名字
         * @return [type]          [description]
         */
        public function save($srcs){
                $funs = "image{$this->info['type']}";
                $funs($this->image,$srcs);
                //move_uploaded_file($this->image, $srcs);
        }
        /**
         * 销毁图片
         */
        public function __destruct(){
                imagedestroy($this->image);
        }
}

文章来源:http://www.cnblogs.com/hello-tl/p/7592974.html