PHP Imagick完美实现图片裁切、生成缩略图、添加水印

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PHP Imagick完美实现图片裁切、生成缩略图、添加水印

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

}

原文链接：http://www.phpfensi.com/php/20210710/17159.html

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