我已经创建了一个使用PHP在现有图像上添加水印的脚本。这个功能很好。我可以将它定位在左上角、左下角、右上角、右下角和居中位置。但是我还没有找到如何重复水印的方法。
我想做一个像这张图片一样的重复水印:
(图片已省略)
代码:
我想做一个像这张图片一样的重复水印:
(图片已省略)
代码:
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);