本文實例講解了PHP使用Imagick 裁切、生成縮略圖、添加水印自動檢測和處理，支持gif，分享給大家供大家參考，具體內容如下
調用方式:
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 @著作權所有: 1024 intelligence ( <a href="http://www.1024i.com" target="_blank">http://www.1024i.com</a> ) 獲得使用本類庫的許可, 您必須保留著作權聲明信息. 報告漏洞，意見或建議, 請聯系 Lou Barnes([email protected]) */ class lib_image_imagick { private $image = null; private $type = null; // 構造函數 public function __construct(){} // 析構函數 public function __destruct() { if($this->image!==null) $this->image->destroy(); } // 載入圖像 public function open($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); } } /* * 更改圖像大小 $fit: 適應大小方式 'force': 把圖片強制變形成 $width X $height 大小 'scale': 按比例在安全框 $width X $height 內縮放圖片, 輸出縮放後圖像大小 不完全等於 $width X $height 'scale_fill': 按比例在安全框 $width X $height 內縮放圖片，安全框內沒有像素的地方填充色, 使用此參數時可設置背景填充色 $bg_color = array(255,255,255)(紅,綠,藍, 透明度) 透明度(0不透明-127完全透明)) 其它: 智能模能 縮放圖像並載取圖像的中間部分 $width X $height 像素大小 $fit = 'force','scale','scale_fill' 時： 輸出完整圖像 $fit = 圖像方位值 時, 輸出指定位置部分圖像 字母與圖像的對應關系如下: north_west north north_east west center east south_west south south_east */ public function resize_to($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 = $canvas; } } // 添加水印圖片 public function add_watermark($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); } } // 保存到指定路徑 public function save_to( $path ) { if($this->type=='gif') { $this->image->writeImages($path, true); } else { $this->image->writeImage($path); } } // 輸出圖像 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']; } // 設置圖像類型， 默認與源類型一致 public function set_type( $type='png' ) { $this->type = $type; $this->image->setImageFormat( $type ); } // 獲取源圖像類型 public function get_type() { return $this->type; } // 當前對象是否為圖片 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 );} // 生成縮略圖 $fit為真時將保持比例並在安全框 $width X $height 內生成縮略圖片 /* 添加一個邊框 $width: 左右邊框寬度 $height: 上下邊框寬度 $color: 顏色: RGB 顏色 'rgb(255,0,0)' 或 16進制顏色 '#FF0000' 或顏色單詞 'white'/'red'... */ public function border($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, $angle);} // 運動模糊 public function radial_blur($radius){$this->image->radialBlurImage($radius);} // 徑向模糊 public function add_noise($type=null){$this->image->addNoiseImage($type==null?imagick::NOISE_IMPULSE:$type);} // 添加噪點 public function level($black_point, $gamma, $white_point){$this->image->levelImage($black_point, $gamma, $white_point);} // 調整色階 public function modulate($brightness, $saturation, $hue){$this->image->modulateImage($brightness, $saturation, $hue);} // 調整亮度、飽和度、色調 public function charcoal($radius, $sigma){$this->image->charcoalImage($radius, $sigma);} // 素描 public function oil_paint($radius){$this->image->oilPaintImage($radius);} // 油畫效果 public function flop(){$this->image->flopImage();} // 水平翻轉 public function flip(){$this->image->flipImage();} // 垂直翻轉 }
希望本文所述對大家學習php程序設計有所幫助。
