Community Learn Tools Library Leisure
search
English
Home > Backend Development > PHP Tutorial > body text

PHP Imagick perfectly realizes picture cropping, generating thumbnails and adding watermarks_php skills

WBOY
Release： 2016-05-16 19:58:18
Original
1029 people have browsed it

The example in this article explains how PHP uses Imagick to crop, generate thumbnails, and add watermarks for automatic detection and processing. It supports gif and is shared 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($type==null&#63;imagick::NOISE_IMPULSE:$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.

Related labels：
imagick php add watermark Generate thumbnails
source：php.cn
Previous article：A powerful tool for PHP debugging: PHPDBG_php skills Next article：PHP mass mail machine implementation code_php skills
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
PHP arrays obtained from URL parameters do not behave as expected I have a URL parameter that contains the category ID and I want to treat it as an array li...
From 2024-04-06 22:09:02
0
1
1428
Where should I place CustomLog directive in apache I'm using php:7.2-apachedocker. I need to disable health check url login access log. Based...
From 2024-04-06 22:03:59
0
1
990
What is the format of the variables in the return value? I am a new learner of php. I found a piece of code: if($x<time()){return[false,'error']...
From 2024-04-06 21:55:20
0
1
778
Problems encountered when using opentbs to generate odt files: values ​​of the same key are displayed in the same row instead of separate columns. I'm using a library called OpenTbs to create odt using PHP, I'm using it because columns a...
From 2024-04-06 20:18:18
0
1
483
Group MySQL results by ID for looping over I have a table with flight data in mysql. I'm writing a php code that will group and displ...
From 2024-04-06 17:27:56
0
1
406
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