Community Learn Tools Library Leisure
search
English
Home > Backend Development > PHP Tutorial > PHP Imagick perfectly realizes picture cropping, generating thumbnails and adding watermarks

PHP Imagick perfectly realizes picture cropping, generating thumbnails and adding watermarks

WBOY
Release： 2016-07-29 09:02:09
Original
986 people have browsed it

This article explains the example of PHP using Imagick to crop, generate thumbnails, add watermarks, automatic detection and processing, supports gif, and shares it with everyone for your reference. The specific content is as follows

Calling method: 

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');
Copy after login

imagick.class. php

<&#63;php  
/* 
@版本日期: 版本日期: 2012年1月18日 
@著作权所有: 1024 intelligence ( <a href="http://www.1024i.com" target="_blank">http://www.1024i.com</a> ) 
获得使用本类库的许可, 您必须保留著作权声明信息. 
报告漏洞，意见或建议, 请联系 Lou Barnes(iua1024@gmail.com) 
*/  
 
class lib_image_imagick  
{  
private $image = null;  
private $type = null;  
// 构造函数  
public function __construct(){}  
 
// 析构函数  
public function __destruct()  
{  
if($this->image!==null) $this->image->destroy();  
}  
// 载入图像  
public function open($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);  
}  
}  
/* 
* 更改图像大小 
$fit: 适应大小方式 
'force': 把图片强制变形成 $width X $height 大小 
'scale': 按比例在安全框 $width X $height 内缩放图片, 输出缩放后图像大小 不完全等于 $width X $height 
'scale_fill': 按比例在安全框 $width X $height 内缩放图片，安全框内没有像素的地方填充色, 使用此参数时可设置背景填充色 $bg_color = array(255,255,255)(红,绿,蓝, 透明度) 透明度(0不透明-127完全透明)) 
其它: 智能模能 缩放图像并载取图像的中间部分 $width X $height 像素大小 
$fit = 'force','scale','scale_fill' 时： 输出完整图像 
$fit = 图像方位值 时, 输出指定位置部分图像 
字母与图像的对应关系如下: 
north_west north north_east 
west center east 
south_west south south_east 
*/  
public function resize_to($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;  
}  
}  
 
// 添加水印图片  
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);  
}  
}  
 
// 保存到指定路径  
public function save_to( $path )  
{  
if($this->type=='gif')  
{  
$this->image->writeImages($path, true);  
}  
else  
{  
$this->image->writeImage($path);  
}  
}  
// 输出图像  
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'];  
}  
// 设置图像类型， 默认与源类型一致  
public function set_type( $type='png' )  
{  
$this->type = $type;  
$this->image->setImageFormat( $type );  
}  
// 获取源图像类型  
public function get_type()  
{  
return $this->type;  
}  
 
// 当前对象是否为图片  
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 );} // 生成缩略图 $fit为真时将保持比例并在安全框 $width X $height 内生成缩略图片  
/* 
添加一个边框 
$width: 左右边框宽度 
$height: 上下边框宽度 
$color: 颜色: RGB 颜色 'rgb(255,0,0)' 或 16进制颜色 '#FF0000' 或颜色单词 'white'/'red'... 
*/  
public function border($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, $angle);} // 运动模糊  
public function radial_blur($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, $sigma);} // 素描  
public function oil_paint($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  
}
Copy after login

I hope this article will be helpful to everyone learning php programming.

The above has introduced how PHP Imagick can perfectly realize image cropping, thumbnail generation, and watermarking, including other aspects. I hope it will be helpful to friends who are interested in PHP tutorials.

Related labels：
gt height image this width
source：php.cn
Previous article：How json_encode prevents Chinese characters from being escaped into unicode Next article：Static methods and static variables of PHP classes
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Articles by Author
Latest Issues
How can I match the text width to the width of a dynamically sized image/title? See this codepen: https://codepen.io/allen-houng/pen/XGMjMr?editors=1100#0<div><i...
From 2024-04-06 10:04:43
0
2
386
Confused while sending binary image (jpg) data to AWS Lambda backend via AWS API Gateway Apologies in advance if I'm missing something simple! I have successfully sent an image fr...
From 2024-04-05 13:09:55
0
1
389
Count the number of class names to 3 digits through a for loop (001~100) in SCSS (SASS) How to compile $i to "3 digits"? @for$iffrom1through100{.bg-image#{$i}{backgroun...
From 2024-04-04 17:25:46
0
1
367
Upload multiple image files in CodeIgniter using Ajax and PHP I'm having trouble uploading multiple image files to the server side. It would be great if...
From 2024-04-03 22:35:03
0
1
318
Create an API pull for Vue.js I don't know what's wrong with me or why this isn't working, I just want the random dog ph...
From 2024-04-03 16:12:29
0
1
363
Related Topics
More>
Popular Recommendations
Popular Tutorials
More>
Related Tutorials
Popular Recommendations
Latest courses
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template