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PHP Imagick完美实现图片裁切、生成缩略图、添加水印,

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풀어 주다: 2016-06-13 08:45:47
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PHP Imagick完美实现图片裁切、生成缩略图、添加水印,

本文实例讲解了PHP使用Imagick 裁切、生成缩略图、添加水印自动检测和处理,支持gif,分享给大家供大家参考,具体内容如下

调用方式:

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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');

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imagick.class.php

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<&#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 

}

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希望本文所述对大家学习php程序设计有所帮助。

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