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101 lines
3.8 KiB
PHP
101 lines
3.8 KiB
PHP
<?php
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/**
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* GD Watermark Lib Plugin Definition File
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*
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* This file contains the plugin definition for GD Watermark
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* Usage:
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* <?php
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* require_once 'path/to/ThumbLib.inc.php';
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* $pic = PhpThumbFactory::create('path/to/pic/destination');
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* $watermark = PhpThumbFactory::create('path/to/watermark/destination');
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*
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* //overlays the $pic-image with the $watermark-image on the right bottom corner, no offset
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* $pic->addWatermark($watermark, 'rightBottom', 50, 0, 0);
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* $pic->show(); //or $pic->save('path/to/new/pic/destination');
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* ?>
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*
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* PHP Version 5 with GD 2.0+
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* PhpThumb : PHP Thumb Library <http://phpthumb.gxdlabs.com>
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* Copyright (c) 2009, Ian Selby/Gen X Design
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*
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* Author(s): Ian Selby <ian@gen-x-design.com>
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*
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* Licensed under the MIT License
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* Redistributions of files must retain the above copyright notice.
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*
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* @author Thomas Dullnig <thomas.dullnig@sevenspire.com>
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* @copyright Copyright (c) 2009-2010 SEVENSPIRE
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* @link http://www.sevenspire.com
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* @license http://www.opensource.org/licenses/mit-license.php The MIT License
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* @version 1.0
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* @package PhpThumb
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* @filesource
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*/
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/**
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* GD Watermark Lib Plugin
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*
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* Overlays an image with another image to create a watermark-effect
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*
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* @package PhpThumb
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* @subpackage Plugins
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*/
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class GdWatermark
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{
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/**
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* Function copied from: http://www.php.net/manual/en/function.imagecopymerge.php#92787
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* Does the same as "imagecopymerge" but preserves the alpha-channel
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*/
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protected function imageCopyMergeAlpha(&$dst_im, &$src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h, $pct){
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$cut = imagecreatetruecolor($src_w, $src_h);
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imagecopy($cut, $dst_im, 0, 0, $dst_x, $dst_y, $src_w, $src_h);
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imagecopy($cut, $src_im, 0, 0, $src_x, $src_y, $src_w, $src_h);
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imagecopymerge($dst_im, $cut, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h, $pct);
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}
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/**
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* Adds a watermark to the current image and overlays it on the given position.
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* @param object $wm a GdThumb-Object
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* @param object $pos Can be: left/west, right/east, center for the x-axis and top/north/upper, bottom/lower/south, center for the y-axis
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* Examples:
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* - leftTop/leftop/topleft/topLeft same as westNorth same as westupper same as leftnorth or any other combination
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* - center --> centers both the x- and y-axis
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* - leftCenter --> set x-axis to the left corner of the image and centers the y-axis
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* @param object $opacity
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* - set the opacity of the watermark in percent, 0 = total transparent, 100 = total opaque
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* @param object $offsetX
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* - add an offset on the x-axis. can be negative to set an offset to the left
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* @param object $offsetY
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* - add an offset on the y-axis. can be negative to set an offset to the top
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* @param object $that
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* - the current GdThumb-Object
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* @return the manipulated GdThumb-Object for chaining
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*/
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public function addWatermark($wm, $pos, $opacity, $offsetX, $offsetY, $that) // dont use &wm etc.
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{
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$picDim = $that->getCurrentDimensions();
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$wmDim = $wm->getCurrentDimensions();
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$wmPosX = $offsetX;
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$wmPosY = $offsetY;
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if(preg_match('/right|east/i', $pos)){$wmPosX += $picDim['width'] - $wmDim['width'];}
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else if(!preg_match('/left|west/i', $pos)){$wmPosX += intval($picDim['width']/2 - $wmDim['width']/2);}
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if(preg_match('/bottom|lower|south/i', $pos)){$wmPosY += $picDim['height'] - $wmDim['height'];}
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else if(!preg_match('/upper|top|north/i', $pos)){$wmPosY += intval($picDim['height']/2 - $wmDim['height']/2);}
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$workingImage = $that->getWorkingImage();
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$wmImage = ($wm->getWorkingImage() ? $wm->getWorkingImage() : $wm->getOldImage());
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$this->imageCopyMergeAlpha($workingImage, $wmImage, $wmPosX, $wmPosY, 0, 0, $wmDim['width'], $wmDim['height'], $opacity);
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$that->setWorkingImage($workingImage);
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return $that;
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}
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}
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$pt = PhpThumb::getInstance();
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$pt->registerPlugin('GdWatermark', 'gd');
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