如何用GD和PHP重複水印圖像？

我已經創建了一個腳本，使用PHP在現有圖像上添加水印。這一切都很好。我可以將它定位在左上角，左下角，右上角，右下角並居中。如果我想要的話，我一直無法弄清楚如何重複水印。如何用GD和PHP重複水印圖像？

我希望做的重複水印這樣的形象：

enter image description here

代碼：

function imagecopymerge_alpha($dst_im, $src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h, $pct){ 
    // creating a cut resource 
    $cut = imagecreatetruecolor($src_w, $src_h); 

    // copying relevant section from background to the cut resource 
    imagecopy($cut, $dst_im, 0, 0, $dst_x, $dst_y, $src_w, $src_h); 

    // copying relevant section from watermark to the cut resource 
    imagecopy($cut, $src_im, 0, 0, $src_x, $src_y, $src_w, $src_h); 

    // insert cut resource to destination image 
    imagecopymerge($dst_im, $cut, $dst_x, $dst_y, 0, 0, $src_w, $src_h, $pct); 
} 


$imagesource = $image['file_path']; 
$watermarkPath = $settings['watermark']; 
$filetype  = substr($imagesource,strlen($imagesource)-4,4); 
$filetype  = strtolower($filetype); 
$watermarkType = substr($watermarkPath,strlen($watermarkPath)-4,4); 
$watermarkType = strtolower($watermarkType); 

// Let's pretend that $watermark and $image are now GD resources. 

$imagewidth   = imagesx($image); 
$imageheight  = imagesy($image); 
$watermarkwidth  = imagesx($watermark); 
$watermarkheight = imagesy($watermark); 

switch ($settings['watermark_location']) 
{ 
    case "tl": //Top Left 
     $startwidth  = 20; 
     $startheight = 20; 
     break; 
    case "bl": //Bottom Left 
     $startwidth  = 20; 
     $startheight = (($imageheight - $watermarkheight) - 20); 
     break; 
    case "tr": //Top Right 
     $startwidth  = (($imagewidth - $watermarkwidth) - 20); 
     $startheight = 20; 
     break; 
    case "br": //Bottom Right 
     $startwidth  = (($imagewidth - $watermarkwidth) - 20); 
     $startheight = (($imageheight - $watermarkheight) - 20); 
     break; 
    case "middle": //Middle/center 
     $startwidth  = (($imagewidth - $watermarkwidth)/2); 
     $startheight = (($imageheight - $watermarkheight)/2); 
     break; 
    case "repeat": 
     // not sure what to do here 
     break; 
    default: 
     $startwidth  = (($imagewidth - $watermarkwidth)/2); 
     $startheight = (($imageheight - $watermarkheight)/2); 
} 

imagecopymerge_alpha($image, $watermark, $startwidth, $startheight, 0, 0, $watermarkwidth, $watermarkheight,$settings['watermark_opacity']); 
imagejpeg($image,NULL,90); 
imagedestroy($image); 
imagedestroy($watermark);

來源

2012-02-13 Ronnie

如何發佈您的代碼。只是一個猜測，但這可能有幫助。 – 2012-02-13 23:12:24

我們絕對肯定需要查看您已使用的代碼，因此我們可以爲您提供有關如何重複製作水印的建議。 – Charles 2012-02-13 23:20:29

貼了一個pastie..it一噸的code..just專注於開關案件約70行下來 – Ronnie 2012-02-13 23:21:28