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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<?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 $ 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
} |