PHP的ImageMagick图像的多个尺寸 - 无法让它工作

Question

大家好：）预先感谢您对此问题的任何帮助。

我正在使用CodeIgniter，并且图像上传，旋转和调整大小成功。 这是当我尝试创建多个尺寸的图像，我有点迷路。

这里是我的代码：

// First I make two copies of the origional image - there is no problem here - these always work. I always have the successfully copied images. 

       $Copy_Mid_Size_File = "Some_Path_For_The_Newly_Copied_Mid_Size_Image" 

       if(!copy($source_image, $Copy_Mid_Size_File)){ 
        echo "failed to copy $Copy_Mid_Size_File - Please contact the system administrator. \n"; 
        die(); 
       } 

       $Copy_Thumbnail_Size_File = "Some_Path_For_The_Newly_Copied_Thumbnail_Size_Image" 

       if(!copy($source_image, $Copy_Thumbnail_Size_File)){ 
        echo "failed to copy $Copy_Thumbnail_Size_File - Please contact the system administrator. \n"; 
        die(); 
       } 

       // Now I resize for the mid size image 
       $config['image_library'] = 'imagemagick';   
       $config['library_path'] = '/usr/bin'; 

       $config['source_image'] = $Copy_Mid_Size_File; 
       $config['maintain_ratio'] = TRUE; 
       $config['quality'] = '100%'; 
       $config['master_dim'] = 'auto'; 
       $config['width'] = 200; 
       $config['height'] = 200; 

       $this->load->library('image_lib', $config); 

       if(!$this->image_lib->resize()){ 
        echo $this->image_lib->display_errors();// This has never reported an error yet 
        echo "Image Re-size for Mid Size Image FAILED!";// This has never reported an error yet 
        die(); 
       }else{ 
        echo" Mid-Size Re-size Worked!"; 
       } 


       // Now I try to resize for the Thumbnail 
       $config['image_library'] = 'imagemagick';   
       $config['library_path'] = '/usr/bin'; 

       $config['source_image'] = $Copy_Thumbnail_Size_File; 

       $config['maintain_ratio'] = TRUE; 
       $config['quality'] = '100%'; 
       $config['master_dim'] = 'auto'; 
       $config['width'] = 50; 
       $config['height'] = 50; 

       $this->load->library('image_lib', $config); 

       if(!$this->image_lib->resize()){ 
        echo $this->image_lib->display_errors();// This has never reported an error yet 
        echo "Image Re-size for Thumbnail Size Image FAILED!";// This has never reported an error yet 
        die(); 
       }else{ 
        echo" Thumbnail Re-size Worked!"; 
       } 

我总是最后的图像适当数量的正确命名 - 缩略图只是不重新大小 - 没有报告的错误。它总是说成功了。

如果我先将缩略图重新调整大小代码 - 缩略图重新调整大小 - 但中等大小的图像不会。

我意识到还有其他方法来加载库 - 但我不明白为什么第一次重新大小的作品，但第二次没有。

任何想法？

谢谢。 问候， 肯

Answer 1

你只需要一次加载库，但你需要初始化它每一次新的配置。所以，你的代码看起来就像这样：

// load the library 
$this->load->library('image_lib'); 

// first image: 
// set some config 
$config['image_library'] = 'imagemagick'; 
... 

// initialize the library with this config 
$this->image_lib->initialize($config); 
// Do the resize: 
$this->image_lib->resize(); 

// clear the config: 
$this->image_lib->clear(); 

// second image: 
// set some config 
$config['image_library'] = 'imagemagick'; 
... 

// re-initialize the library with the new config 
$this->image_lib->initialize($config); 
// Do the resize: 
$this->image_lib->resize(); 

我怀疑你甚至可以只需更新$config['width']和$config['height']不必清楚，但我没有测试过！

作为一个方面说明，您并不需要首先将图像复制到正确的目录中;该笨图像库可以为您创建一个新的，如果你设置你的配置是这样的：

$config['new_image'] = '/path/to/new_image.jpg'; 

这将保存图片到新的路径，而不必所有的地方创建副本。

参考：http://codeigniter.com/user_guide/libraries/image_lib.html