CodeIgniter圖像處理（調整大小和水印）

Question

我希望有人能幫助我。我試圖通過表單上傳圖片，將其大小調整爲600px，創建一個100px的縮略圖，然後將水印圖像添​​加到600px版本，但下面的代碼僅創建原始圖像的兩個版本。

$image = $this->upload->data(); 
$resized = base_url()."images/artwork/".$image['orig_name']; 

//Create 600px version 
$config = array(); 
$config['source_image'] = $resized; 
$config['image_library'] = 'gd2'; 
$config['maintain_ratio'] = TRUE; 
$config['width'] = 600; 
$config['height'] = 600; 
$this->image_lib->initialize($config); 
$this->image_lib->resize(); 
$this->image_lib->clear(); 
unset($config); 

//Add watermark to 600px version 
$config = array(); 
$config['source_image'] = $resized; 
$config['image_library'] = 'gd2'; 
$config['wm_type'] = 'overlay'; 
$config['wm_overlay_path'] = './images/logo.gif'; 
$config['wm_vrt_alignment'] = 'middle'; 
$config['wm_hor_alignment'] = 'center'; 
$this->image_lib->initialize($config); 
$this->image_lib->watermark(); 
$this->image_lib->clear(); 
unset($config); 

//Create 100px unwatermarked thumbnail 
$config = array(); 
$config['source_image'] = $resized; 
$config['image_library'] = 'gd2'; 
$config['maintain_ratio'] = TRUE; 
$config['width'] = 100; 
$config['height'] = 100; 
$this->image_lib->initialize($config); 
$this->image_lib->resize(); 
$this->image_lib->clear(); 
unset($config); 
$thumbnail = base_url()."images/artwork/".$image['raw_name']."".$image['file_ext']; 

echo "<a href=\"".$resized."\"><img src=\"".$thumbnail."\" /></a>"; 

Answer 1

它看起來並不像你告訴它爲縮略圖製作副本。

//Create 100px unwatermarked thumbnail 
$config = array(); 
$config['source_image'] = $resized; 
$config['image_library'] = 'gd2'; 
$config['maintain_ratio'] = TRUE; 
$config['create_thumb'] = TRUE; // Tells it to make a copy called *_thumb.* 
$config['width'] = 100; 
$config['height'] = 100; 
$this->image_lib->initialize($config); 
$this->image_lib->resize(); 
$this->image_lib->clear(); 
unset($config); 

您可能還希望把錯誤校驗碼，所以你知道，如果它失敗，原因是：

if (! $this->image_lib->resize()) 
{ 
    echo $this->image_lib->display_errors(); 
} 

Answer 2

使用圖像武也許會有幫助，按照本例：http://ellislab.com/forums/viewthread/162030/#778258