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Llewellyn van der Merwe
2016-01-30 22:28:43 +02:00
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admin/compiler/joomla_3/wideimage/Operation/Crop.php Normal file
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<?php
/**
* @author Gasper Kozak
* @copyright 2007-2011
This file is part of WideImage.
WideImage is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
WideImage is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with WideImage; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
* @package Internal/Operations
**/
/**
* Crop operation class
*
* @package Internal/Operations
*/
class WideImage_Operation_Crop
{
/**
* Returns a cropped image
*
* @param WideImage_Image $img
* @param smart_coordinate $left
* @param smart_coordinate $top
* @param smart_coordinate $width
* @param smart_coordinate $height
* @return WideImage_Image
*/
function execute($img, $left, $top, $width, $height)
{
$width = WideImage_Coordinate::fix($width, $img->getWidth(), $width);
$height = WideImage_Coordinate::fix($height, $img->getHeight(), $height);
$left = WideImage_Coordinate::fix($left, $img->getWidth(), $width);
$top = WideImage_Coordinate::fix($top, $img->getHeight(), $height);
if ($left < 0)
{
$width = $left + $width;
$left = 0;
}
if ($width > $img->getWidth() - $left)
$width = $img->getWidth() - $left;
if ($top < 0)
{
$height = $top + $height;
$top = 0;
}
if ($height > $img->getHeight() - $top)
$height = $img->getHeight() - $top;
if ($width <= 0 || $height <= 0)
throw new WideImage_Exception("Can't crop outside of an image.");
$new = $img->doCreate($width, $height);
if ($img->isTransparent() || $img instanceof WideImage_PaletteImage)
{
$new->copyTransparencyFrom($img);
if (!imagecopyresized($new->getHandle(), $img->getHandle(), 0, 0, $left, $top, $width, $height, $width, $height))
throw new WideImage_GDFunctionResultException("imagecopyresized() returned false");
}
else
{
$new->alphaBlending(false);
$new->saveAlpha(true);
if (!imagecopyresampled($new->getHandle(), $img->getHandle(), 0, 0, $left, $top, $width, $height, $width, $height))
throw new WideImage_GDFunctionResultException("imagecopyresampled() returned false");
}
return $new;
}
}