ImageMagick 实例

netwenk

1. <?php
   
2. 
   
3. function resize($src,$destSrc, $w,$h)
   
4.     {
   
5.      $temp=pathinfo($src);
   
6.         $name=$temp["basename"];
   
7.         $dir=$temp["dirname"];
   
8.         $savepath = empty($destSrc) ? "{$dir}/{$name}.thumb.jpg" : $destSrc;
   
9.         
   
10.         
    
11.         $image = new Imagick();
    
12.         $image->newImage($w, $h, new ImagickPixel('white'));
    
13.         $image->setImageFormat('png');
    
14.         
    
15.         $imagick = new Imagick();
    
16.         $imagick->readImage($src);
    
17.         $width = $imagick->getImageWidth();
    
18.         $height = $imagick->getImageHeight();
    
19. 
    
20.         if ($width > $w || $height > $h) {
    
21.             $imagick->resizeImage($w, $h, Imagick::FILTER_CATROM, 1, true);
    
22.         }
    
23.         
    
24.         $imagick->setImageFormat('JPEG');
    
25.         $imagick->setImageCompression(Imagick::COMPRESSION_JPEG);
    
26.         $a = $imagick->getImageCompressionQuality() * 0.75;
    
27.         if ($a == 0) {
    
28.             $a = 75;
    
29.         }
    
30.         $imagick->setImageCompressionQuality($a);
    
31.         $imagick->stripImage();
    
32.         
    
33.         $per1 = round($width/$height,2);//计算原图长宽比
    
34.         $per2 = round($w/$h,2);//计算缩略图长宽比
    
35.         
    
36.         if($per1 == $per2){
    
37.             $imagick->writeImage($savepath);
    
38.         }else{
    
39.             if($per1 > $per2){
    
40.                 $x=0;
    
41.                 $y=($h - $imagick->getImageHeight())/2;//垂直居中
    
42.             }elseif($per1 < $per2){        
    
43.                 $x=($w - $imagick->getImageWidth())/2;//水平居中
    
44.                 $y=0;
    
45.             }else{
    
46.              $x = $y = 0;
    
47.             }
    
48.             $image->compositeImage($imagick, $imagick->getImageCompose(), $x, $y);
    
49.             $image->writeImage($savepath);
    
50.         }
    
51.         
    
52.         return $savepath;
    
53.     }
    
54. ?>