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<?php |
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/** |
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##DOC-SIGNATURE## |
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This file is part of WideImage. |
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WideImage is free software; you can redistribute it and/or modify |
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it under the terms of the GNU Lesser General Public License as published by |
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the Free Software Foundation; either version 2.1 of the License, or |
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(at your option) any later version. |
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WideImage is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU Lesser General Public License for more details. |
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You should have received a copy of the GNU Lesser General Public License |
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along with WideImage; if not, write to the Free Software |
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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* @package Internal/Operations |
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**/ |
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namespace WideImage\Operation; |
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use WideImage\Exception\GDFunctionResultException; |
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/** |
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* AsNegative operation class |
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* |
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* @package Internal/Operations |
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*/ |
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class AsNegative |
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{ |
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/** |
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* Returns a greyscale copy of an image |
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* |
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* @param \WideImage\Image $image |
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* @return \WideImage\Image |
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*/ |
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public function execute($image) |
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{ |
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$palette = !$image->isTrueColor(); |
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$transparent = $image->isTransparent(); |
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if ($palette && $transparent) { |
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$tcrgb = $image->getTransparentColorRGB(); |
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} |
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$new = $image->asTrueColor(); |
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if (!imagefilter($new->getHandle(), IMG_FILTER_NEGATE)) { |
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throw new GDFunctionResultException("imagefilter() returned false"); |
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} |
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if ($palette) { |
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$new = $new->asPalette(); |
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if ($transparent) { |
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$irgb = array('red' => 255 - $tcrgb['red'], 'green' => 255 - $tcrgb['green'], 'blue' => 255 - $tcrgb['blue'], 'alpha' => 127); |
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// needs imagecolorexactalpha instead of imagecolorexact, otherwise doesn't work on some transparent GIF images |
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$new_tci = imagecolorexactalpha($new->getHandle(), $irgb['red'], $irgb['green'], $irgb['blue'], 127); |
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$new->setTransparentColor($new_tci); |
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} |
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} |
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return $new; |
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} |
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} |
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geekwright /
XoopsCore25
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