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:
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 ( <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( $this->image )return true;elsereturn false;} public function thumbnail($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} 希望本文所述对大家学习php程序设计有所帮助。