Posted in PHP onApril 17, 2014
PHP 使用Imagick模块 缩放,裁剪,压缩图片 包括gif图片
缩放 裁剪
/** * 图片裁剪 * 裁剪规则: * 1. 高度为空或为零 按宽度缩放 高度自适应 * 2. 宽度为空或为零 按高度缩放 宽度自适应 * 3. 宽度,高度到不为空或为零 按宽高比例等比例缩放裁剪 默认从头部居中裁剪 * @param number $width * @param number $height */ public function resize($width=0, $height=0){ if($width==0 && $height==0){ return; } $color = '';// 'rgba(255,255,255,1)'; $size = $this->image->getImagePage (); //原始宽高 $src_width = $size ['width']; $src_height = $size ['height']; //按宽度缩放 高度自适应 if($width!=0 && $height==0){ if($src_width>$width){ $height = intval($width*$src_height/$src_width); if ($this->type == 'gif') { $this->_resizeGif($width, $height); }else{ $this->image->thumbnailImage ( $width, $height, true ); } } return; } //按高度缩放 宽度自适应 if($width==0 && $height!=0){ if($src_height>$height){ $width = intval($src_width*$height/$src_height); if ($this->type == 'gif') { $this->_resizeGif($width, $height); }else{ $this->image->thumbnailImage ( $width, $height, true ); } } return; } //缩放的后的尺寸 $crop_w = $width; $crop_h = $height; //缩放后裁剪的位置 $crop_x = 0; $crop_y = 0; if(($src_width/$src_height) < ($width/$height)){ //宽高比例小于目标宽高比例 宽度等比例放大 按目标高度从头部截取 $crop_h = intval($src_height*$width/$src_width); //从顶部裁剪 不用计算 $crop_y }else{ //宽高比例大于目标宽高比例 高度等比例放大 按目标宽度居中裁剪 $crop_w = intval($src_width*$height/$src_height); $crop_x = intval(($crop_w-$width)/2); } if ($this->type == 'gif') { $this->_resizeGif($crop_w, $crop_h, true, $width, $height,$crop_x, $crop_y); } else { $this->image->thumbnailImage ( $crop_w, $crop_h, true ); $this->image->cropImage($width, $height,$crop_x, $crop_y); } }
针对gif图片的处理方法
/** * 处理gif图片 需要对每一帧图片处理 * @param unknown $t_w 缩放宽 * @param unknown $t_h 缩放高 * @param string $isCrop 是否裁剪 * @param number $c_w 裁剪宽 * @param number $c_h 裁剪高 * @param number $c_x 裁剪坐标 x * @param number $c_y 裁剪坐标 y */ private function _resizeGif($t_w, $t_h, $isCrop=false, $c_w=0, $c_h=0, $c_x=0, $c_y=0){ $dest = new Imagick(); $color_transparent = new ImagickPixel("transparent"); //透明色 foreach($this->image as $img){ $page = $img->getImagePage(); $tmp = new Imagick(); $tmp->newImage($page['width'], $page['height'], $color_transparent, 'gif'); $tmp->compositeImage($img, Imagick::COMPOSITE_OVER, $page['x'], $page['y']); $tmp->thumbnailImage ( $t_w, $t_h, true ); if($isCrop){ $tmp->cropImage($c_w, $c_h, $c_x, $c_y); } $dest->addImage($tmp); $dest->setImagePage($tmp->getImageWidth(), $tmp->getImageHeight(), 0, 0); $dest->setImageDelay($img->getImageDelay()); $dest->setImageDispose($img->getImageDispose()); } $this->image->destroy (); $this->image = $dest; }
保存时压缩处理
// 保存到指定路径 public function save_to($path) { //压缩图片质量 $this->image->setImageFormat('JPEG'); $this->image->setImageCompression(Imagick::COMPRESSION_JPEG); $a = $this->image->getImageCompressionQuality() * 0.60; if ($a == 0) { $a = 60; } $this->image->setImageCompressionQuality($a); $this->image->stripImage(); if ($this->type == 'gif') { $this->image->writeImages ( $path, true ); } else { $this->image->writeImage ( $path ); } }
ImagickService.php
<?php /** * 图片处理服务类 * 使用php扩展服务Imagick实现 * ImageMagick 官网地址 [url]http:www.imagemagick.org/script/index.php[/url] * * @author weiguang3 * @since 20140403 */ class ImagickService { private $image = null; private $type = null; // 构造函数 public function __construct() { } // 析构函数 public function __destruct() { if ($this->image !== null) $this->image->destroy (); } public function init(){ } // 载入图像 public function open($path) { $this->image = new Imagick ( $path ); if ($this->image) { $this->type = strtolower ( $this->image->getImageFormat () ); } return $this->image; } /** * 图片裁剪 * 裁剪规则: * 1. 高度为空或为零 按宽度缩放 高度自适应 * 2. 宽度为空或为零 按高度缩放 宽度自适应 * 3. 宽度,高度到不为空或为零 按宽高比例等比例缩放裁剪 默认从头部居中裁剪 * @param number $width * @param number $height */ public function resize($width=0, $height=0){ if($width==0 && $height==0){ return; } $color = '';// 'rgba(255,255,255,1)'; $size = $this->image->getImagePage (); //原始宽高 $src_width = $size ['width']; $src_height = $size ['height']; //按宽度缩放 高度自适应 if($width!=0 && $height==0){ if($src_width>$width){ $height = intval($width*$src_height/$src_width); if ($this->type == 'gif') { $this->_resizeGif($width, $height); }else{ $this->image->thumbnailImage ( $width, $height, true ); } } return; } //按高度缩放 宽度自适应 if($width==0 && $height!=0){ if($src_height>$height){ $width = intval($src_width*$height/$src_height); if ($this->type == 'gif') { $this->_resizeGif($width, $height); }else{ $this->image->thumbnailImage ( $width, $height, true ); } } return; } //缩放的后的尺寸 $crop_w = $width; $crop_h = $height; //缩放后裁剪的位置 $crop_x = 0; $crop_y = 0; if(($src_width/$src_height) < ($width/$height)){ //宽高比例小于目标宽高比例 宽度等比例放大 按目标高度从头部截取 $crop_h = intval($src_height*$width/$src_width); //从顶部裁剪 不用计算 $crop_y }else{ //宽高比例大于目标宽高比例 高度等比例放大 按目标宽度居中裁剪 $crop_w = intval($src_width*$height/$src_height); $crop_x = intval(($crop_w-$width)/2); } if ($this->type == 'gif') { $this->_resizeGif($crop_w, $crop_h, true, $width, $height,$crop_x, $crop_y); } else { $this->image->thumbnailImage ( $crop_w, $crop_h, true ); $this->image->cropImage($width, $height,$crop_x, $crop_y); } } /** * 处理gif图片 需要对每一帧图片处理 * @param unknown $t_w 缩放宽 * @param unknown $t_h 缩放高 * @param string $isCrop 是否裁剪 * @param number $c_w 裁剪宽 * @param number $c_h 裁剪高 * @param number $c_x 裁剪坐标 x * @param number $c_y 裁剪坐标 y */ private function _resizeGif($t_w, $t_h, $isCrop=false, $c_w=0, $c_h=0, $c_x=0, $c_y=0){ $dest = new Imagick(); $color_transparent = new ImagickPixel("transparent"); //透明色 foreach($this->image as $img){ $page = $img->getImagePage(); $tmp = new Imagick(); $tmp->newImage($page['width'], $page['height'], $color_transparent, 'gif'); $tmp->compositeImage($img, Imagick::COMPOSITE_OVER, $page['x'], $page['y']); $tmp->thumbnailImage ( $t_w, $t_h, true ); if($isCrop){ $tmp->cropImage($c_w, $c_h, $c_x, $c_y); } $dest->addImage($tmp); $dest->setImagePage($tmp->getImageWidth(), $tmp->getImageHeight(), 0, 0); $dest->setImageDelay($img->getImageDelay()); $dest->setImageDispose($img->getImageDispose()); } $this->image->destroy (); $this->image = $dest; } /** * 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) { //压缩图片质量 $this->image->setImageFormat('JPEG'); $this->image->setImageCompression(Imagick::COMPRESSION_JPEG); $a = $this->image->getImageCompressionQuality() * 0.60; if ($a == 0) { $a = 60; } $this->image->setImageCompressionQuality($a); $this->image->stripImage(); if ($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 $this->type; } public function get_file_size(){ if($this->image){ return 0;//$this->image->getImageLength(); getImageLength not find }else{ return 0; } } public function get_file_type(){ if($this->image){ return $this->image->getimagemimetype(); }else{ return 0; } } public function get_sha1(){ if($this->image){ return sha1($this->image->__tostring()); }else{ return ''; } } // 当前对象是否为图片 public function is_image() { if ($this->image) return true; else return false; } /* * 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 }
php使用imagick模块实现图片缩放、裁剪、压缩示例
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