PHP 使用 Imagick 裁切/生成缩略图/添加水印自动检测和处理 GIF

给骨头系统开发的图像库的 imagick 部分 ，支持 gif ， 完美支持裁切、生成缩略图、添加水印 。

支持按方位生成缩略图像， 如：

// 把左上角优先
$image->resize_to(100, 100, 'north_west');
// 右边优先
$image->resize_to(100, 100, 'east');
...

更多参数看源代码

原图

效果图:

调用方式:

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 
@著作权所有: 1024 intelligence ( http://www.1024i.com ) 
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([e-mail]) 
*/ 

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 
}