664 lines
20 KiB
PHP
664 lines
20 KiB
PHP
<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006~2016 http://thinkphp.cn All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
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// +----------------------------------------------------------------------
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// | Author: 麦当苗儿 <zuojiazi.cn@gmail.com> <http://www.zjzit.cn>
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// +----------------------------------------------------------------------
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namespace org\image\driver;
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use think\Lang;
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class Imagick
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{
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/**
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* 图像资源对象
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*
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* @var resource
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*/
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private $im;
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/**
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* 图像信息，包括 width, height, type, mime, size
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*
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* @var array
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*/
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private $info;
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/**
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* 构造方法，可用于打开一张图像
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*
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* @param string $imgname 图像路径
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*/
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public function __construct($imgname = null)
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{
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if (!extension_loaded('Imagick')) {
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throw new \Exception(Lang::get('_NOT_SUPPERT_') . ':Imagick');
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}
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$imgname && $this->open($imgname);
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}
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/**
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* 打开一张图像
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*
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* @param string $imgname 图像路径
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*/
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public function open($imgname)
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{
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//检测图像文件
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if (!is_file($imgname)) {
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throw new \Exception('不存在的图像文件');
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}
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//销毁已存在的图像
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empty($this->im) || $this->im->destroy();
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//载入图像
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$this->im = new \Imagick(realpath($imgname));
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//设置图像信息
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$this->info = [
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'width' => $this->im->getImageWidth(),
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'height' => $this->im->getImageHeight(),
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'type' => strtolower($this->im->getImageFormat()),
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'mime' => $this->im->getImageMimeType(),
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];
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}
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/**
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* 保存图像
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*
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* @param string $imgname 图像保存名称
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* @param string $type 图像类型
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* @param boolean $interlace 是否对JPEG类型图像设置隔行扫描
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*/
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public function save($imgname, $type = null, $interlace = true)
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{
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if (empty($this->im)) {
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throw new \Exception('没有可以被保存的图像资源');
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}
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//设置图片类型
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if (is_null($type)) {
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$type = $this->info['type'];
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} else {
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$type = strtolower($type);
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$this->im->setImageFormat($type);
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}
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//JPEG图像设置隔行扫描
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if ('jpeg' == $type || 'jpg' == $type) {
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$this->im->setImageInterlaceScheme(1);
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}
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//去除图像配置信息
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$this->im->stripImage();
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//保存图像
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$imgname = realpath(dirname($imgname)) . '/' . basename($imgname); //强制绝对路径
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if ('gif' == $type) {
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$this->im->writeImages($imgname, true);
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} else {
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$this->im->writeImage($imgname);
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}
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}
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/**
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* 返回图像宽度
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*
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* @return integer 图像宽度
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*/
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public function width()
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{
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if (empty($this->im)) {
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throw new \Exception('没有指定图像资源');
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}
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return $this->info['width'];
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}
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/**
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* 返回图像高度
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*
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* @return integer 图像高度
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*/
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public function height()
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{
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if (empty($this->im)) {
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throw new \Exception('没有指定图像资源');
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}
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return $this->info['height'];
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}
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/**
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* 返回图像类型
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*
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* @return string 图像类型
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*/
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public function type()
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{
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if (empty($this->im)) {
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throw new \Exception('没有指定图像资源');
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}
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return $this->info['type'];
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}
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/**
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* 返回图像MIME类型
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*
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* @return string 图像MIME类型
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*/
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public function mime()
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{
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if (empty($this->im)) {
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throw new \Exception('没有指定图像资源');
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}
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return $this->info['mime'];
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}
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/**
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* 返回图像尺寸数组 0 - 图像宽度，1 - 图像高度
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*
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* @return array 图像尺寸
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*/
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public function size()
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{
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if (empty($this->im)) {
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throw new \Exception('没有指定图像资源');
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}
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return [$this->info['width'], $this->info['height']];
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}
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/**
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* 裁剪图像
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*
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* @param integer $w 裁剪区域宽度
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* @param integer $h 裁剪区域高度
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* @param integer $x 裁剪区域x坐标
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* @param integer $y 裁剪区域y坐标
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* @param integer $width 图像保存宽度
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* @param integer $height 图像保存高度
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*/
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public function crop($w, $h, $x = 0, $y = 0, $width = null, $height = null)
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{
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if (empty($this->im)) {
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throw new \Exception('没有可以被裁剪的图像资源');
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}
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//设置保存尺寸
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empty($width) && $width = $w;
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empty($height) && $height = $h;
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//裁剪图片
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if ('gif' == $this->info['type']) {
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$img = $this->im->coalesceImages();
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$this->im->destroy(); //销毁原图
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//循环裁剪每一帧
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do {
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$this->_crop($w, $h, $x, $y, $width, $height, $img);
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} while ($img->nextImage());
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//压缩图片
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$this->im = $img->deconstructImages();
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$img->destroy(); //销毁零时图片
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} else {
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$this->_crop($w, $h, $x, $y, $width, $height);
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}
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}
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/**
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* 裁剪图片，内部调用
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*
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*/
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private function _crop($w, $h, $x, $y, $width, $height, $img = null)
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{
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is_null($img) && $img = $this->im;
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//裁剪
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$info = $this->info;
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if (0 != $x || 0 != $y || $w != $info['width'] || $h != $info['height']) {
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$img->cropImage($w, $h, $x, $y);
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$img->setImagePage($w, $h, 0, 0); //调整画布和图片一致
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}
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//调整大小
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if ($w != $width || $h != $height) {
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$img->scaleImage($width, $height);
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}
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//设置缓存尺寸
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$this->info['width'] = $w;
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$this->info['height'] = $h;
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}
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/**
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* 生成缩略图
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*
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* @param integer $width 缩略图最大宽度
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* @param integer $height 缩略图最大高度
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* @param integer $type 缩略图裁剪类型
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*/
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public function thumb($width, $height, $type = THINKIMAGE_THUMB_SCALE)
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{
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if (empty($this->im)) {
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throw new \Exception('没有可以被缩略的图像资源');
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}
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//原图宽度和高度
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$w = $this->info['width'];
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$h = $this->info['height'];
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/* 计算缩略图生成的必要参数 */
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switch ($type) {
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/* 等比例缩放 */
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case THINKIMAGE_THUMB_SCALING:
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//原图尺寸小于缩略图尺寸则不进行缩略
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if ($w < $width && $h < $height) {
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return;
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}
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//计算缩放比例
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$scale = min($width / $w, $height / $h);
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//设置缩略图的坐标及宽度和高度
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$x = $y = 0;
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$width = $w * $scale;
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$height = $h * $scale;
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break;
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/* 居中裁剪 */
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case THINKIMAGE_THUMB_CENTER:
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//计算缩放比例
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$scale = max($width / $w, $height / $h);
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//设置缩略图的坐标及宽度和高度
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$w = $width / $scale;
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$h = $height / $scale;
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$x = ($this->info['width'] - $w) / 2;
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$y = ($this->info['height'] - $h) / 2;
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break;
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/* 左上角裁剪 */
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case THINKIMAGE_THUMB_NORTHWEST:
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//计算缩放比例
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$scale = max($width / $w, $height / $h);
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//设置缩略图的坐标及宽度和高度
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$x = $y = 0;
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$w = $width / $scale;
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$h = $height / $scale;
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break;
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/* 右下角裁剪 */
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case THINKIMAGE_THUMB_SOUTHEAST:
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//计算缩放比例
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$scale = max($width / $w, $height / $h);
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//设置缩略图的坐标及宽度和高度
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$w = $width / $scale;
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$h = $height / $scale;
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$x = $this->info['width'] - $w;
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$y = $this->info['height'] - $h;
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break;
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/* 填充 */
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case THINKIMAGE_THUMB_FILLED:
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//计算缩放比例
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if ($w < $width && $h < $height) {
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$scale = 1;
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} else {
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$scale = min($width / $w, $height / $h);
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}
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//设置缩略图的坐标及宽度和高度
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$neww = $w * $scale;
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$newh = $h * $scale;
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$posx = ($width - $w * $scale) / 2;
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$posy = ($height - $h * $scale) / 2;
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//创建一张新图像
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$newimg = new Imagick();
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$newimg->newImage($width, $height, 'white', $this->info['type']);
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if ('gif' == $this->info['type']) {
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$imgs = $this->im->coalesceImages();
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$img = new Imagick();
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$this->im->destroy(); //销毁原图
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//循环填充每一帧
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do {
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//填充图像
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$image = $this->_fill($newimg, $posx, $posy, $neww, $newh, $imgs);
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$img->addImage($image);
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$img->setImageDelay($imgs->getImageDelay());
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$img->setImagePage($width, $height, 0, 0);
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$image->destroy(); //销毁零时图片
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} while ($imgs->nextImage());
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//压缩图片
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$this->im->destroy();
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$this->im = $img->deconstructImages();
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$imgs->destroy(); //销毁零时图片
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$img->destroy(); //销毁零时图片
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} else {
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//填充图像
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$img = $this->_fill($newimg, $posx, $posy, $neww, $newh);
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//销毁原图
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$this->im->destroy();
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$this->im = $img;
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}
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//设置新图像属性
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$this->info['width'] = $width;
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$this->info['height'] = $height;
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return;
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/* 固定 */
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case THINKIMAGE_THUMB_FIXED:
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$x = $y = 0;
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break;
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default:
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throw new \Exception('不支持的缩略图裁剪类型');
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}
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/* 裁剪图像 */
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$this->crop($w, $h, $x, $y, $width, $height);
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}
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/**
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* 填充指定图像，内部使用
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*
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*/
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private function _fill($newimg, $posx, $posy, $neww, $newh, $img = null)
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{
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is_null($img) && $img = $this->im;
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/* 将指定图片绘入空白图片 */
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$draw = new ImagickDraw();
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$draw->composite($img->getImageCompose(), $posx, $posy, $neww, $newh, $img);
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$image = $newimg->clone();
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$image->drawImage($draw);
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$draw->destroy();
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return $image;
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}
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/**
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* 添加水印
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*
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* @param string $source 水印图片路径
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* @param integer $locate 水印位置
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* @param integer $alpha 水印透明度
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*/
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public function water($source, $locate = THINKIMAGE_WATER_SOUTHEAST)
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{
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//资源检测
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if (empty($this->im)) {
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throw new \Exception('没有可以被添加水印的图像资源');
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}
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if (!is_file($source)) {
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throw new \Exception('水印图像不存在');
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}
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//创建水印图像资源
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$water = new Imagick(realpath($source));
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$info = [$water->getImageWidth(), $water->getImageHeight()];
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/* 设定水印位置 */
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switch ($locate) {
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/* 右下角水印 */
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case THINKIMAGE_WATER_SOUTHEAST:
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$x = $this->info['width'] - $info[0];
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$y = $this->info['height'] - $info[1];
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break;
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/* 左下角水印 */
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case THINKIMAGE_WATER_SOUTHWEST:
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$x = 0;
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$y = $this->info['height'] - $info[1];
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break;
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/* 左上角水印 */
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case THINKIMAGE_WATER_NORTHWEST:
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$x = $y = 0;
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break;
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/* 右上角水印 */
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case THINKIMAGE_WATER_NORTHEAST:
|
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$x = $this->info['width'] - $info[0];
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$y = 0;
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break;
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|
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/* 居中水印 */
|
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case THINKIMAGE_WATER_CENTER:
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$x = ($this->info['width'] - $info[0]) / 2;
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$y = ($this->info['height'] - $info[1]) / 2;
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break;
|
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|
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/* 下居中水印 */
|
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case THINKIMAGE_WATER_SOUTH:
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$x = ($this->info['width'] - $info[0]) / 2;
|
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$y = $this->info['height'] - $info[1];
|
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break;
|
||
|
||
/* 右居中水印 */
|
||
case THINKIMAGE_WATER_EAST:
|
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$x = $this->info['width'] - $info[0];
|
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$y = ($this->info['height'] - $info[1]) / 2;
|
||
break;
|
||
|
||
/* 上居中水印 */
|
||
case THINKIMAGE_WATER_NORTH:
|
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$x = ($this->info['width'] - $info[0]) / 2;
|
||
$y = 0;
|
||
break;
|
||
|
||
/* 左居中水印 */
|
||
case THINKIMAGE_WATER_WEST:
|
||
$x = 0;
|
||
$y = ($this->info['height'] - $info[1]) / 2;
|
||
break;
|
||
|
||
default:
|
||
/* 自定义水印坐标 */
|
||
if (is_array($locate)) {
|
||
list($x, $y) = $locate;
|
||
} else {
|
||
throw new \Exception('不支持的水印位置类型');
|
||
}
|
||
}
|
||
|
||
//创建绘图资源
|
||
$draw = new ImagickDraw();
|
||
$draw->composite($water->getImageCompose(), $x, $y, $info[0], $info[1], $water);
|
||
|
||
if ('gif' == $this->info['type']) {
|
||
$img = $this->im->coalesceImages();
|
||
$this->im->destroy(); //销毁原图
|
||
|
||
do {
|
||
//添加水印
|
||
$img->drawImage($draw);
|
||
} while ($img->nextImage());
|
||
|
||
//压缩图片
|
||
$this->im = $img->deconstructImages();
|
||
$img->destroy(); //销毁零时图片
|
||
|
||
} else {
|
||
//添加水印
|
||
$this->im->drawImage($draw);
|
||
}
|
||
|
||
//销毁水印资源
|
||
$draw->destroy();
|
||
$water->destroy();
|
||
}
|
||
|
||
/**
|
||
* 图像添加文字
|
||
*
|
||
* @param string $text 添加的文字
|
||
* @param string $font 字体路径
|
||
* @param integer $size 字号
|
||
* @param string $color 文字颜色
|
||
* @param integer $locate 文字写入位置
|
||
* @param integer $offset 文字相对当前位置的偏移量
|
||
* @param integer $angle 文字倾斜角度
|
||
*/
|
||
public function text($text, $font, $size, $color = '#00000000',
|
||
$locate = THINKIMAGE_WATER_SOUTHEAST, $offset = 0, $angle = 0) {
|
||
//资源检测
|
||
if (empty($this->im)) {
|
||
throw new \Exception('没有可以被写入文字的图像资源');
|
||
}
|
||
|
||
if (!is_file($font)) {
|
||
throw new \Exception("不存在的字体文件：{$font}");
|
||
}
|
||
|
||
//获取颜色和透明度
|
||
if (is_array($color)) {
|
||
$color = array_map('dechex', $color);
|
||
foreach ($color as &$value) {
|
||
$value = str_pad($value, 2, '0', STR_PAD_LEFT);
|
||
}
|
||
$color = '#' . implode('', $color);
|
||
} elseif (!is_string($color) || 0 !== strpos($color, '#')) {
|
||
throw new \Exception('错误的颜色值');
|
||
}
|
||
$col = substr($color, 0, 7);
|
||
$alp = strlen($color) == 9 ? substr($color, -2) : 0;
|
||
|
||
//获取文字信息
|
||
$draw = new ImagickDraw();
|
||
$draw->setFont(realpath($font));
|
||
$draw->setFontSize($size);
|
||
$draw->setFillColor($col);
|
||
$draw->setFillAlpha(1 - hexdec($alp) / 127);
|
||
$draw->setTextAntialias(true);
|
||
$draw->setStrokeAntialias(true);
|
||
|
||
$metrics = $this->im->queryFontMetrics($draw, $text);
|
||
|
||
/* 计算文字初始坐标和尺寸 */
|
||
$x = 0;
|
||
$y = $metrics['ascender'];
|
||
$w = $metrics['textWidth'];
|
||
$h = $metrics['textHeight'];
|
||
|
||
/* 设定文字位置 */
|
||
switch ($locate) {
|
||
/* 右下角文字 */
|
||
case THINKIMAGE_WATER_SOUTHEAST:
|
||
$x += $this->info['width'] - $w;
|
||
$y += $this->info['height'] - $h;
|
||
break;
|
||
|
||
/* 左下角文字 */
|
||
case THINKIMAGE_WATER_SOUTHWEST:
|
||
$y += $this->info['height'] - $h;
|
||
break;
|
||
|
||
/* 左上角文字 */
|
||
case THINKIMAGE_WATER_NORTHWEST:
|
||
// 起始坐标即为左上角坐标，无需调整
|
||
break;
|
||
|
||
/* 右上角文字 */
|
||
case THINKIMAGE_WATER_NORTHEAST:
|
||
$x += $this->info['width'] - $w;
|
||
break;
|
||
|
||
/* 居中文字 */
|
||
case THINKIMAGE_WATER_CENTER:
|
||
$x += ($this->info['width'] - $w) / 2;
|
||
$y += ($this->info['height'] - $h) / 2;
|
||
break;
|
||
|
||
/* 下居中文字 */
|
||
case THINKIMAGE_WATER_SOUTH:
|
||
$x += ($this->info['width'] - $w) / 2;
|
||
$y += $this->info['height'] - $h;
|
||
break;
|
||
|
||
/* 右居中文字 */
|
||
case THINKIMAGE_WATER_EAST:
|
||
$x += $this->info['width'] - $w;
|
||
$y += ($this->info['height'] - $h) / 2;
|
||
break;
|
||
|
||
/* 上居中文字 */
|
||
case THINKIMAGE_WATER_NORTH:
|
||
$x += ($this->info['width'] - $w) / 2;
|
||
break;
|
||
|
||
/* 左居中文字 */
|
||
case THINKIMAGE_WATER_WEST:
|
||
$y += ($this->info['height'] - $h) / 2;
|
||
break;
|
||
|
||
default:
|
||
/* 自定义文字坐标 */
|
||
if (is_array($locate)) {
|
||
list($posx, $posy) = $locate;
|
||
$x += $posx;
|
||
$y += $posy;
|
||
} else {
|
||
throw new \Exception('不支持的文字位置类型');
|
||
}
|
||
}
|
||
|
||
/* 设置偏移量 */
|
||
if (is_array($offset)) {
|
||
$offset = array_map('intval', $offset);
|
||
list($ox, $oy) = $offset;
|
||
} else {
|
||
$offset = intval($offset);
|
||
$ox = $oy = $offset;
|
||
}
|
||
|
||
/* 写入文字 */
|
||
if ('gif' == $this->info['type']) {
|
||
$img = $this->im->coalesceImages();
|
||
$this->im->destroy(); //销毁原图
|
||
do {
|
||
$img->annotateImage($draw, $x + $ox, $y + $oy, $angle, $text);
|
||
} while ($img->nextImage());
|
||
|
||
//压缩图片
|
||
$this->im = $img->deconstructImages();
|
||
$img->destroy(); //销毁零时图片
|
||
|
||
} else {
|
||
$this->im->annotateImage($draw, $x + $ox, $y + $oy, $angle, $text);
|
||
}
|
||
$draw->destroy();
|
||
}
|
||
|
||
/**
|
||
* 析构方法，用于销毁图像资源
|
||
*
|
||
*/
|
||
public function __destruct()
|
||
{
|
||
empty($this->im) || $this->im->destroy();
|
||
}
|
||
|
||
}
|