http://phpthumb.gxdlabs.com/forums/ Help, Suggestions, and General Discussion en Thu, 09 Sep 2010 04:52:26 +0000 http://phpthumb.gxdlabs.com/forums/topic/watermark-plugin#post-115 Thu, 01 Oct 2009 20:47:16 +0000 RB 115@http://phpthumb.gxdlabs.com/forums/ <p><strong>File name</strong> gd_watermark.inc.php</p> <p><code>&lt;?php</p> <p>class GdWatermarkLib<br /> {<br /> /**<br /> * Instance of GdThumb passed to this class<br /> *<br /> * @var GdThumb<br /> */<br /> protected $parentInstance;<br /> protected $currentDimensions;<br /> protected $workingImage;<br /> protected $newImage;<br /> protected $options;</p> <p> public function createWatermark ($mask_file, $mask_position='cc', $mask_padding=0, &#38;$that)<br /> {<br /> // bring stuff from the parent class into this class...<br /> $this-&gt;parentInstance = $that;<br /> $this-&gt;currentDimensions = $this-&gt;parentInstance-&gt;getCurrentDimensions();<br /> $this-&gt;workingImage = $this-&gt;parentInstance-&gt;getWorkingImage();<br /> $this-&gt;newImage = $this-&gt;parentInstance-&gt;getOldImage();<br /> $this-&gt;options = $this-&gt;parentInstance-&gt;getOptions();</p> <p> $this-&gt;mask_file = $mask_file;<br /> $this-&gt;mask_position = $mask_position;<br /> $this-&gt;mask_padding = $mask_padding;</p> <p> $canvas_width = $this-&gt;currentDimensions['width'];<br /> $canvas_height = $this-&gt;currentDimensions['height'];</p> <p> if ($canvas_width &lt;= 200 || $canvas_height &lt;= 200) {<br /> return $that;<br /> }</p> <p> list($stamp_width, $stamp_height, $stamp_type, $stamp_attr) = getimagesize($mask_file);</p> <p> switch ($stamp_type) {<br /> case 1:<br /> $stamp_image = imagecreatefromgif($mask_file);<br /> break;<br /> case 2:<br /> @ini_set('gd.jpeg_ignore_warning', 1);<br /> $stamp_image = imagecreatefromjpeg($mask_file);<br /> break;<br /> case 3:<br /> $stamp_image = imagecreatefrompng($mask_file);<br /> break;<br /> }</p> <p> imagealphablending($this-&gt;workingImage, true);</p> <p> if ($stamp_width &gt; $canvas_width || $stamp_height &gt; $canvas_height) {<br /> // some simple resize math<br /> //$water_resize_factor = round($canvas_width / $stamp_width);<br /> $water_resize_factor = 0.5;<br /> $new_mask_width = $stamp_width * $water_resize_factor;<br /> $new_mask_height = $stamp_height * $water_resize_factor;<br /> $mask_padding = $mask_padding * $water_resize_factor;<br /> // the new watermark creation takes place starting from here<br /> $new_mask_image = imagecreatetruecolor($new_mask_width , $new_mask_height);<br /> // imagealphablending is important in order to keep, our png image (the watewrmark) transparent<br /> imagealphablending($new_mask_image , false);<br /> imagecopyresampled(<br /> $new_mask_image , $stamp_image, 0, 0, 0, 0,<br /> $new_mask_width, $new_mask_height,<br /> $stamp_width, $stamp_height<br /> );<br /> // assign the new values to the old variables<br /> $stamp_width = $new_mask_width;<br /> $stamp_height = $new_mask_height;<br /> $stamp_image = $new_mask_image;<br /> }</p> <p> switch($mask_position) {<br /> case 'cc':<br /> // Center<br /> $start_width = round(($canvas_width - $stamp_width) / 2);<br /> $start_height = round(($canvas_height - $stamp_height) / 2);<br /> break;<br /> case 'lt':<br /> // Left Top<br /> $start_width = $mask_padding;<br /> $start_height = $mask_padding;<br /> break;<br /> case 'rt':<br /> // Right Top<br /> $start_width = $canvas_width - $mask_padding - $stamp_width;<br /> $start_height = $mask_padding;<br /> break;<br /> case 'lb':<br /> // Left Bottom<br /> $start_width = $mask_padding;<br /> $start_height = $canvas_height - $mask_padding - $stamp_height;<br /> break;<br /> case 'rb':<br /> // Right Bottom<br /> $start_width = $canvas_width - $mask_padding - $stamp_width;<br /> $start_height = $canvas_height - $mask_padding - $stamp_height;<br /> break;<br /> case 'cb':<br /> // Center Bottom<br /> $start_width = round(($canvas_width - $stamp_width) / 2);<br /> $start_height = $canvas_height - $mask_padding - $stamp_height;<br /> break;<br /> }</p> <p> imagecopy( $this-&gt;workingImage, $stamp_image, $start_width, $start_height, 0, 0, $stamp_width, $stamp_height );<br /> imagedestroy( $stamp_image );</p> <p> return $that;<br /> }<br /> }</p> <p>$pt = PhpThumb::getInstance();<br /> $pt-&gt;registerPlugin('GdWatermarkLib', 'gd');<br /> ?&gt;</code></p> <p>//------------------<br /> $thumb = PhpThumbFactory::create($src);<br /> $thumb-&gt;adaptiveResize($width, $height);<br /> $thumb-&gt;createWatermark($mark_image, $position, $padding);<br /> $thumb-&gt;show();</p> <p>//------------------<br /> $mark_image = 'path/to/mark.png'<br /> $position =<br /> <ul><li>cc = center center</li><li>lt = left top</li><li>rt = right top</li><li>lb = left bottom</li><li>rb = right bottom</li><li>cb = center bottom</li><br /> </ul><br /> $padding = number like 10 = padding 10px </p>