PHP Imagick完美实现图片裁切、生成缩略图、添加水印
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这篇文章主要介绍了PHP Imagick完美实现图片裁切、生成缩略图、添加水印的相关资料,具有一定的参考价值,感兴趣的小伙伴们可以参考一下。
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( $this->image )
- return true;
- else
- return false;
- }
- public function thumbnail($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
- }
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