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PHP Imagick完美實(shí)現(xiàn)圖片裁切、生成縮略圖、添加水印

 更新時(shí)間：2016年02月22日 11:39:22   投稿：lijiao  
這篇文章主要介紹了PHP Imagick完美實(shí)現(xiàn)圖片裁切、生成縮略圖、添加水印的相關(guān)資料，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

本文實(shí)例講解了PHP使用Imagick 裁切、生成縮略圖、添加水印自動(dòng)檢測(cè)和處理，支持gif，分享給大家供大家參考，具體內(nèi)容如下

調(diào)用方式:

include 'imagick.class.php';  
$image = new lib_image_imagick();  
$image->open('a.gif');  
$image->resize_to(100, 100, 'scale_fill');  
$image->add_text('1024i.com', 10, 20);  
$image->add_watermark('1024i.gif', 10, 50);  
$image->save_to('x.gif');

imagick.class.php

<?php  
/* 
@版本日期: 版本日期: 2012年1月18日 
@著作權(quán)所有: 1024 intelligence ( <a  target="_blank">http://www.1024i.com</a> ) 
獲得使用本類庫(kù)的許可, 您必須保留著作權(quán)聲明信息. 
報(bào)告漏洞，意見(jiàn)或建議, 請(qǐng)聯(lián)系 Lou Barnes(iua1024@gmail.com) 
*/  
 
class lib_image_imagick  
{  
private $image = null;  
private $type = null;  
// 構(gòu)造函數(shù)  
public function __construct(){}  
 
// 析構(gòu)函數(shù)  
public function __destruct()  
{  
if($this->image!==null) $this->image->destroy();  
}  
// 載入圖像  
public function open($path)  
{  
$this->image = new Imagick( $path );  
if($this->image)  
{  
$this->type = strtolower($this->image->getImageFormat());  
}  
return $this->image;  
}  
 
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);  
}  
}  
/* 
* 更改圖像大小 
$fit: 適應(yīng)大小方式 
'force': 把圖片強(qiáng)制變形成 $width X $height 大小 
'scale': 按比例在安全框 $width X $height 內(nèi)縮放圖片, 輸出縮放后圖像大小 不完全等于 $width X $height 
'scale_fill': 按比例在安全框 $width X $height 內(nèi)縮放圖片，安全框內(nèi)沒(méi)有像素的地方填充色, 使用此參數(shù)時(shí)可設(shè)置背景填充色 $bg_color = array(255,255,255)(紅,綠,藍(lán), 透明度) 透明度(0不透明-127完全透明)) 
其它: 智能模能 縮放圖像并載取圖像的中間部分 $width X $height 像素大小 
$fit = 'force','scale','scale_fill' 時(shí)： 輸出完整圖像 
$fit = 圖像方位值 時(shí), 輸出指定位置部分圖像 
字母與圖像的對(duì)應(yīng)關(guān)系如下: 
north_west north north_east 
west center east 
south_west south south_east 
*/  
public function resize_to($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;  
}  
}  
 
// 添加水印圖片  
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);  
}  
}  
 
// 添加水印文字  
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);  
}  
}  
 
// 保存到指定路徑  
public function save_to( $path )  
{  
if($this->type=='gif')  
{  
$this->image->writeImages($path, true);  
}  
else  
{  
$this->image->writeImage($path);  
}  
}  
// 輸出圖像  
public function output($header = true)  
{  
if($header) header('Content-type: '.$this->type);  
echo $this->image->getImagesBlob();  
}  
 
public function get_width()  
{  
$size = $this->image->getImagePage();  
return $size['width'];  
}  
public function get_height()  
{  
$size = $this->image->getImagePage();  
return $size['height'];  
}  
// 設(shè)置圖像類型， 默認(rèn)與源類型一致  
public function set_type( $type='png' )  
{  
$this->type = $type;  
$this->image->setImageFormat( $type );  
}  
// 獲取源圖像類型  
public function get_type()  
{  
return $this->type;  
}  
 
// 當(dāng)前對(duì)象是否為圖片  
public function is_image()  
{  
if( $this->image )  
return true;  
else  
return false;  
}  
 
public function thumbnail($width = 100, $height = 100, $fit = true){ $this->image->thumbnailImage( $width, $height, $fit );} // 生成縮略圖 $fit為真時(shí)將保持比例并在安全框 $width X $height 內(nèi)生成縮略圖片  
/* 
添加一個(gè)邊框 
$width: 左右邊框?qū)挾?
$height: 上下邊框?qū)挾?
$color: 顏色: RGB 顏色 'rgb(255,0,0)' 或 16進(jìn)制顏色 '#FF0000' 或顏色單詞 'white'/'red'... 
*/  
public function border($width, $height, $color='rgb(220, 220, 220)')  
{  
$color=new ImagickPixel();  
$color->setColor($color);  
$this->image->borderImage($color, $width, $height);  
}  
public function blur($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, $angle);} // 運(yùn)動(dòng)模糊  
public function radial_blur($radius){$this->image->radialBlurImage($radius);} // 徑向模糊  
public function add_noise($type=null){$this->image->addNoiseImage($type==null?imagick::NOISE_IMPULSE:$type);} // 添加噪點(diǎn)  
public function level($black_point, $gamma, $white_point){$this->image->levelImage($black_point, $gamma, $white_point);} // 調(diào)整色階  
public function modulate($brightness, $saturation, $hue){$this->image->modulateImage($brightness, $saturation, $hue);} // 調(diào)整亮度、飽和度、色調(diào)  
public function charcoal($radius, $sigma){$this->image->charcoalImage($radius, $sigma);} // 素描  
public function oil_paint($radius){$this->image->oilPaintImage($radius);} // 油畫效果  
public function flop(){$this->image->flopImage();} // 水平翻轉(zhuǎn)  
public function flip(){$this->image->flipImage();} // 垂直翻轉(zhuǎn)  
}

希望本文所述對(duì)大家學(xué)習(xí)php程序設(shè)計(jì)有所幫助。

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