evo watermarked

watermarked.php

<?php  

header('content-type: image/jpeg');  

// Should be a safe image repository if you
// need to make sense.
$dirprefix = "http://sitename.com/"; 

$watermark = $dirprefix."/assets/images/watermark.png";
$image = $dirprefix.$_REQUEST['src'];

watermark($image, $watermark, 2,1);

// The minimumfactors tell how big the image must compared to the watermark
// before the watermark is applied. 2,2 means the image must be at least be 4
// times as big as the watermark.
function watermark($srcfilename, $watermark, $minumfactorx, $minumfactory) {
$imageInfo = getimagesize($srcfilename); 
$width = $imageInfo[0]; 
$height = $imageInfo[1]; 
$logoinfo = getimagesize($watermark);
$logowidth = $logoinfo[0];
$logoheight = $logoinfo[1];
$horizmargin =  $width-$logowidth;
$vertmargin =  $height-$logoheight;
$photoImage = ImageCreateFromJPEG($srcfilename);

if ($width>=($logowidth*$minumfactorx) && $height>=($logoheight*$minumfactory)) {
  // Only add watermark if watermark fits
  ImageAlphaBlending($photoImage, true);
  $logoImage = ImageCreateFromPNG($watermark);
  $logoW = ImageSX($logoImage);
  $logoH = ImageSY($logoImage);
  ImageCopy($photoImage, $logoImage, $horizmargin, $vertmargin, 0, 0, $logoW, $logoH);
}

ImageJPEG($photoImage); 
ImageDestroy($photoImage);
ImageDestroy($logoImage);
}

?>