首页
所有分类
TAGS
文字工具 EMOJI BIBLE
编程 PHP

浅谈php扩展imagick

Posted in PHP onJune 02, 2014

PHP建图通常都用GD库,因为是内置的不需要在服务器上额外安装插件,所以用起来比较省心,但是如果你的程序主要的功能就是处理图像,那?就不建议用GD了,因为GD不但低效能而且能力也比较弱,?子玫南低匙试匆财亩?另外GD的creatfrom也有bug,而imagick却是一个很好的替代品,为此最近把我的一个项目由GD改成了imagick,但是改完之后出现了一些状况在此分享给大家.

首先说一下我这边出现的状况:

状况一:需要重写图像操作class

状况二:imagick多线程时会导致cpu使用率暴增到100%

在此顺便提一下imagick在centos6.4的安装方法:

1、安装ImageMagick

wget http://soft.vpser.net/web/imagemagick/ImageMagick-6.7.1-2.tar.gz
tar zxvf ImageMagick-6.7.1-2.tar.gz
cd ImageMagick-6.7.1-2/
./configure --prefix=/usr/local/imagemagick --disable-openmp
make && make install
ldconfig

测试ImageMagick是否可以正常运行：

/usr/local/imagemagick/bin/convert -version

2、安装PHP扩展：imagick

wget http://pecl.php.net/get/imagick-3.0.1.tgz
tar zxvf imagick-3.0.1.tgz
cd imagick-3.0.1/
/usr/local/php/bin/phpize
./configure --with-php-config=/usr/local/php/bin/php-config --with-imagick=/usr/local/imagemagick
make && make install
ldconfig
vi /usr/local/php/etc/php.ini
添加：extension = "imagick.so"

重启lnmp

/root/lnmp reload

接下来我们针对上述两个状况分别提出解决办法:

状况一的解决办法如下:

/**
    Imagick图像处理类
    用法:
        //引入Imagick物件
        if(!defined('CLASS_IMAGICK')){require(Inc.'class_imagick.php');}
        $Imagick=new class_imagick();
        $Imagick->open('a.gif');
        $Imagick->resize_to(100,100,'scale_fill');
        $Imagick->add_text('1024i.com',10,20);
        $Imagick->add_watermark('1024i.gif',10,50);
        $Imagick->save_to('x.gif');
        unset($Imagick);
/**/
define('CLASS_IMAGICK',TRUE);
class class_imagick{
    private $image=null;
    private $type=null;
    // 构造
    public function __construct(){}
    // 析构
    public function __destruct(){
        if($this->image!==null){$this->image->destroy();}
    }
    // 载入图像
    public function open($path){
        if(!file_exists($path)){
            $this->image=null;
            return ;
        }
        $this->image=new Imagick($path);
        if($this->image){
            $this->type=strtolower($this->image->getImageFormat());
        }
        $this->image->stripImage();
        return $this->image;
    }
    /**
        图像裁切
    /**/
    public function crop($x=0,$y=0,$width=null,$height=null){
        if($width==null) $width=$this->image->getImageWidth()-$x;
        if($height==null) $height=$this->image->getImageHeight()-$y;
        if($width<=0 || $height<=0) return;
        if($this->type=='gif'){
            $image=$this->image;
            $canvas=new Imagick();
            $images=$image->coalesceImages();
            foreach($images as $frame){
                $img=new Imagick();
                $img->readImageBlob($frame);
                $img->cropImage($width,$height,$x,$y);
                $canvas->addImage($img);
                $canvas->setImageDelay($img->getImageDelay());
                $canvas->setImagePage($width,$height,0,0);
            }
            $image->destroy();
            $this->image=$canvas;
        }else{
            $this->image->cropImage($width,$height,$x,$y);
        }
    }
    /**
        更改图像大小
        参数:
            $width:新的宽度
            $height:新的高度
            $fit: 适应大小
                'force': 把图像强制改为$width X $height
                'scale': 按比例在$width X $height内缩放图片,结果不完全等於$width X $height
                'scale_fill':按比例在$width X $height内缩放图片,没有像素的地方填充?色$fill_color=array(255,255,255)(红,绿,蓝,透明度[0不透明-127全透明])
                其他:智能模式,缩放图片并从正中裁切$width X $height的大小
        注意:
            $fit='force','scale','scale_fill'时输出完整图像
            $fit=图像方位时输出指定位置部份的图像
        字母与图像的对应关系如下:
            north_west   north   north_east
            west         center        east
            south_west   south   south_east
    /**/
    public function resize_to($width=100,$height=100,$fit='center',$fill_color=array(255,255,255,0)){
        switch($fit){
        case 'force':
            if($this->type=='gif'){
                $image=$this->image;
                $canvas=new Imagick();
                $images=$image->coalesceImages();
                foreach($images as $frame){
                    $img=new Imagick();
                    $img->readImageBlob($frame);
                    $img->thumbnailImage($width,$height,false);
                    $canvas->addImage($img);
                    $canvas->setImageDelay($img->getImageDelay());
                }
                $image->destroy();
                $this->image=$canvas;
            }else{
                $this->image->thumbnailImage($width,$height,false);
            }
            break;
        case 'scale':
            if($this->type=='gif'){
                $image=$this->image;
                $images=$image->coalesceImages();
                $canvas=new Imagick();
                foreach($images as $frame){
                    $img=new Imagick();
                    $img->readImageBlob($frame);
                    $img->thumbnailImage($width,$height,true);
                    $canvas->addImage($img);
                    $canvas->setImageDelay($img->getImageDelay());
                }
                $image->destroy();
                $this->image=$canvas;
            }else{
                $this->image->thumbnailImage($width,$height,true);
            }
            break;
        case 'scale_fill':
            $size=$this->image->getImagePage();
            $src_width=$size['width'];
            $src_height=$size['height'];
            $x=0;
            $y=0;
            $dst_width=$width;
            $dst_height=$height;
            if($src_width*$height > $src_height*$width){
                $dst_height=intval($width*$src_height/$src_width);
                $y=intval(($height-$dst_height)/2);
            }else{
                $dst_width=intval($height*$src_width/$src_height);
                $x=intval(($width-$dst_width)/2);
            }
            $image=$this->image;
            $canvas=new Imagick();
            $color='rgba('.$fill_color[0].','.$fill_color[1].','.$fill_color[2].','.$fill_color[3].')';
            if($this->type=='gif'){
                $images=$image->coalesceImages();
                foreach($images as $frame){
                    $frame->thumbnailImage($width,$height,true);
                    $draw=new ImagickDraw();
                    $draw->composite($frame->getImageCompose(),$x,$y,$dst_width,$dst_height,$frame);
                    $img=new Imagick();
                    $img->newImage($width,$height,$color,'gif');
                    $img->drawImage($draw);
                    $canvas->addImage($img);
                    $canvas->setImageDelay($img->getImageDelay());
                    $canvas->setImagePage($width,$height,0,0);
                }
            }else{
                $image->thumbnailImage($width,$height,true);
                $draw=new ImagickDraw();
                $draw->composite($image->getImageCompose(),$x,$y,$dst_width,$dst_height,$image);
                $canvas->newImage($width,$height,$color,$this->get_type());
                $canvas->drawImage($draw);
                $canvas->setImagePage($width,$height,0,0);
            }
            $image->destroy();
            $this->image=$canvas;
            break;
        default:
            $size=$this->image->getImagePage();
            $src_width=$size['width'];
            $src_height=$size['height'];
            $crop_x=0;
            $crop_y=0;
            $crop_w=$src_width;
            $crop_h=$src_height;
            if($src_width*$height > $src_height*$width){
                $crop_w=intval($src_height*$width/$height);
            }else{
                $crop_h=intval($src_width*$height/$width);
            }
            switch($fit){
                case 'north_west':
                    $crop_x=0;
                    $crop_y=0;
                    break;
                case 'north':
                    $crop_x=intval(($src_width-$crop_w)/2);
                    $crop_y=0;
                    break;
                case 'north_east':
                    $crop_x=$src_width-$crop_w;
                    $crop_y=0;
                    break;
                case 'west':
                    $crop_x=0;
                    $crop_y=intval(($src_height-$crop_h)/2);
                    break;
                case 'center':
                    $crop_x=intval(($src_width-$crop_w)/2);
                    $crop_y=intval(($src_height-$crop_h)/2);
                    break;
                case 'east':
                    $crop_x=$src_width-$crop_w;
                    $crop_y=intval(($src_height-$crop_h)/2);
                    break;
                case 'south_west':
                    $crop_x=0;
                    $crop_y=$src_height-$crop_h;
                    break;
                case 'south':
                    $crop_x=intval(($src_width-$crop_w)/2);
                    $crop_y=$src_height-$crop_h;
                    break;
                case 'south_east':
                    $crop_x=$src_width-$crop_w;
                    $crop_y=$src_height-$crop_h;
                    break;
                default:
                    $crop_x=intval(($src_width-$crop_w)/2);
                    $crop_y=intval(($src_height-$crop_h)/2);
            }
            $image=$this->image;
            $canvas=new Imagick();
            if($this->type=='gif'){
                $images=$image->coalesceImages();
                foreach($images as $frame){
                    $img=new Imagick();
                    $img->readImageBlob($frame);
                    $img->cropImage($crop_w,$crop_h,$crop_x,$crop_y);
                    $img->thumbnailImage($width,$height,true);
                    $canvas->addImage($img);
                    $canvas->setImageDelay($img->getImageDelay());
                    $canvas->setImagePage($width,$height,0,0);
                }
            }else{
                $image->cropImage($crop_w,$crop_h,$crop_x,$crop_y);
                $image->thumbnailImage($width,$height,true);
                $canvas->addImage($image);
                $canvas->setImagePage($width,$height,0,0);
            }
            $image->destroy();
            $this->image=$canvas;
        }
    }
    /**
        添加图片水印
        参数:
            $path:水印图片(包含完整路径)
            $x,$y:水印座标
    /**/
    public function add_watermark($path,$x=0,$y=0){
        $watermark=new Imagick($path);
        $draw=new ImagickDraw();
        $draw->composite($watermark->getImageCompose(),$x,$y,$watermark->getImageWidth(),$watermark->getimageheight(),$watermark);
        if($this->type=='gif'){
            $image=$this->image;
            $canvas=new Imagick();
            $images=$image->coalesceImages();
            foreach($image as $frame){
                $img=new Imagick();
                $img->readImageBlob($frame);
                $img->drawImage($draw);
                $canvas->addImage($img);
                $canvas->setImageDelay($img->getImageDelay());
            }
            $image->destroy();
            $this->image=$canvas;
        }else{
            $this->image->drawImage($draw);
        }
    }
    /**
        添加文字水印
        参数:
            $text:水印文字
            $x,$y:水印座标
    /**/
    public function add_text($text,$x=0,$y=0,$angle=0,$style=array()){
        $draw=new ImagickDraw();
        if(isset($style['font'])) $draw->setFont($style['font']);
        if(isset($style['font_size'])) $draw->setFontSize($style['font_size']);
        if(isset($style['fill_color'])) $draw->setFillColor($style['fill_color']);
        if(isset($style['under_color'])) $draw->setTextUnderColor($style['under_color']);
        if($this->type=='gif'){
            foreach($this->image as $frame){
                $frame->annotateImage($draw,$x,$y,$angle,$text);
            }
        }else{
            $this->image->annotateImage($draw,$x,$y,$angle,$text);
        }
    }
    /**
        图片存档
        参数:
            $path:存档的位置和新的档案名
    /**/
    public function save_to($path){
        $this->image->stripImage();
        switch($this->type){
        case 'gif':
            $this->image->writeImages($path,true);
            return ;
        case 'jpg':
        case 'jpeg':
            $this->image->setImageCompressionQuality($_ENV['ImgQ']);
            $this->image->writeImage($path);
            return ;
        case 'png':
            $flag = $this->image->getImageAlphaChannel();
            // 如果png背景不透明则压缩
            if(imagick::ALPHACHANNEL_UNDEFINED == $flag or imagick::ALPHACHANNEL_DEACTIVATE == $flag){
                $this->image->setImageType(imagick::IMGTYPE_PALETTE);
                $this->image->writeImage($path);
            }else{
                $this->image->writeImage($path);
            }unset($flag);
            return ;
        default:
            $this->image->writeImage($path);
            return ;
        }
    }
    // 直接输出图像到萤幕
    public function output($header=true){
        if($header) header('Content-type: '.$this->type);
        echo $this->image->getImagesBlob();
    }
    /**
        建立缩小图
        $fit为真时,将保持比例并在$width X $height内?生缩小图
    /**/
    public function thumbnail($width=100,$height=100,$fit=true){$this->image->thumbnailImage($width,$height,$fit);}
    /**
        给图像添加边框
        $width: 左右边框宽度
        $height: 上下边框宽度
        $color: ?色
    /**/
    public function border($width,$height,$color='rgb(220,220,220)'){
        $color=new ImagickPixel();
        $color->setColor($color);
        $this->image->borderImage($color,$width,$height);
    }
    //取得图像宽度
    public function get_width(){$size=$this->image->getImagePage();return $size['width'];}
    //取得图像高度
    public function get_height(){$size=$this->image->getImagePage();return $size['height'];}
    // 设置图像类型
    public function set_type($type='png'){$this->type=$type;$this->image->setImageFormat($type);}
    // 取得图像类型
    public function get_type(){return $this->type;}
    public function blur($radius,$sigma){$this->image->blurImage($radius,$sigma);} // 模糊
    public function gaussian_blur($radius,$sigma){$this->image->gaussianBlurImage($radius,$sigma);} // 高斯模糊
    public function motion_blur($radius,$sigma,$angle){$this->image->motionBlurImage($radius,$sigma,$angle);} // 运动模糊
    public function radial_blur($radius){$this->image->radialBlurImage($radius);} // 径向模糊
    public function add_noise($type=null){$this->image->addNoiseImage($type==null?imagick::NOISE_IMPULSE:$type);} // 添加噪点
    public function level($black_point,$gamma,$white_point){$this->image->levelImage($black_point,$gamma,$white_point);} // 调整色阶
    public function modulate($brightness,$saturation,$hue){$this->image->modulateImage($brightness,$saturation,$hue);} // 调整亮度,饱和度,色调
    public function charcoal($radius,$sigma){$this->image->charcoalImage($radius,$sigma);} // 素描效果
    public function oil_paint($radius){$this->image->oilPaintImage($radius);} // 油画效果
    public function flop(){$this->image->flopImage();} // 水平翻转
    public function flip(){$this->image->flipImage();} // 垂直翻转
}

状况二的解决办法如下:

首先用/usr/local/imagemagick/bin/convert -version指令查看一下输出内容是否已经开?⒘硕嘞叱?Features:的值为空说明是单线程,如果Features:的值是openMP说明是多线程.imagick的多线程模式有一个bug,他会导致多核心的cpu使用率瞬间?升到100所以一定要使用它的单线程模式才行.

Version: ImageMagick 6.7.1-2 2014-05-29 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2011 ImageMagick Studio LLC
Features:  

 上边是我配置正确时显示的结果,如果没有配置正确会显示下边的结果

Version: ImageMagick 6.7.1-2 2014-05-29 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2011 ImageMagick Studio LLC
Features: openMP

 第一种结果是单线程模式,第二种结果是多线程模式,因为imagick的多线程模式有bug,所以如果您刚开始是用多线程模式安装的imagick那就必须要yum remove imagemagick将其卸载掉重新安装才行.

经过重写class,重装imagick之后一切正常,而且处理图像的效能比之以前有了大幅提升

 

浅谈php扩展imagick

声明：登载此文出于传递更多信息之目的，并不意味着赞同其观点或证实其描述。

PHP 相关文章推荐
完美解决PHP中文乱码
Nov 26 PHP
提高PHP编程效率的方法
Nov 07 PHP
Windows下的PHP安装文件线程安全和非线程安全的区别
Apr 23 PHP
php下Memcached入门实例解析
Jan 05 PHP
php绘图之在图片上写中文和英文的方法
Jan 24 PHP
php生成唯一的订单函数分享
Feb 02 PHP
PHP转盘抽奖接口实例
Feb 09 PHP
php使用Session和文件统计在线人数
Jul 04 PHP
Symfony2实现在controller中获取url的方法
Mar 18 PHP
PHP常见字符串处理函数用法示例【转换,转义,截取,比较,查找,反转,切割】
Dec 24 PHP
利用Laravel生成Gravatar头像地址的优雅方法
Dec 30 PHP
php基于 swoole 实现的异步处理任务功能示例
Aug 13 PHP
PHP小技巧之函数重载
Jun 02 #PHP
mac下Apache + MySql + PHP搭建网站开发环境
Jun 02 #PHP
在PHP中使用X-SendFile头让文件下载更快
Jun 01 #PHP
PHP is_subclass_of函数的一个BUG和解决方法
Jun 01 #PHP
PHP中数组的分组排序实例
Jun 01 #PHP
php_screw安装使用教程（另一个PHP代码加密实现）
May 29 #PHP
PHP Curl出现403错误的解决办法
May 29 #PHP
R9700(1) DE1102(1) 胆机(1) DE1107(3) DE1103(2) 239军机(1) DE1105(1) SONY600GR(1) 根德5570(1) WR-800F(1)
You might like
Yii2组件之多图上传插件FileInput的详细使用教程
2016/06/20 PHP
php处理静态页面：页面设置缓存时间实例
2017/06/22 PHP
PDO::prepare讲解
2019/01/29 PHP
PHP通过文件保存和更新信息的方法分析
2019/09/12 PHP
laravel 解决Eloquent ORM的save方法无法插入数据的问题
2019/10/21 PHP
用js实现的抽象CSS圆角效果!!
2007/05/03 Javascript
Js 随机数产生6位数字
2010/05/13 Javascript
jcarousellite.js 基于Jquery的图片无缝滚动插件
2010/12/30 Javascript
javascript 文件的同步加载与异步加载实现原理
2012/12/13 Javascript
javascript的渐进增强与平稳退化浅谈
2013/11/12 Javascript
js查找节点的方法小结
2015/01/13 Javascript
浅谈JS运算符&amp;&amp;和|| 及其优先级
2016/08/10 Javascript
node.js Sequelize实现单实例字段或批量自增、自减
2016/12/08 Javascript
angular forEach方法遍历源码解读
2017/01/25 Javascript
javascript 面向对象实战思想分享
2017/09/07 Javascript
详解基于vue的服务端渲染框架NUXT
2018/06/20 Javascript
vue.js响应式原理解析与实现
2020/06/22 Javascript
vue安装遇到的5个报错及解决方法
2019/06/12 Javascript
解决Layui中layer报错的问题
2019/09/03 Javascript
vue-quill-editor的使用及个性化定制操作
2020/08/04 Javascript
Python代理抓取并验证使用多线程实现
2013/05/03 Python
详解python的webrtc库实现语音端点检测
2017/05/31 Python
pycharm配置当鼠标悬停时快速提示方法参数
2019/07/31 Python
浅谈pandas.cut与pandas.qcut的使用方法及区别
2020/03/03 Python
Python Scrapy多页数据爬取实现过程解析
2020/06/12 Python
一文弄懂Pytorch的DataLoader, DataSet, Sampler之间的关系
2020/07/03 Python
Tretorn美国官网：瑞典外套和鞋类品牌，抵御风雨
2018/07/19 全球购物
Sarenza德国：法国最大的时尚鞋和包包网上商店
2019/06/08 全球购物
大学同学十年聚会感言
2014/02/21 职场文书
领导班子专题民主生活会情况想汇报
2014/09/30 职场文书
秋冬农业生产标语
2014/10/09 职场文书
公司放假通知范文
2015/04/14 职场文书
大学学生会竞选稿
2015/11/19 职场文书
2016年万圣节活动个人总结
2016/04/05 职场文书
Python list去重且保持原顺序不变的方法
2021/04/03 Python
python opencv通过按键采集图片源码
2021/05/20 Python