108 lines
3.1 KiB
PHP
108 lines
3.1 KiB
PHP
<?php
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/**
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* @author Gasper Kozak
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* @copyright 2007-2011
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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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/**
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* ResizeCanvas operation class
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*
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* @package Internal/Operations
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*/
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class WideImage_Operation_ResizeCanvas
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{
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/**
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* Returns an image with a resized canvas
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*
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* The image is filled with $color. Use $scale to determine, when to resize.
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*
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* @param WideImage_Image $img
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* @param smart_coordinate $width
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* @param smart_coordinate $height
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* @param smart_coordinate $left
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* @param smart_coordinate $top
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* @param int $color
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* @param string $scale 'up', 'down', 'any'
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* @param boolean $merge
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* @return WideImage_Image
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*/
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function execute($img, $width, $height, $left, $top, $color, $scale, $merge)
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{
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$new_width = WideImage_Coordinate::fix($width, $img->getWidth());
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$new_height = WideImage_Coordinate::fix($height, $img->getHeight());
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if ($scale == 'down')
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{
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$new_width = min($new_width, $img->getWidth());
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$new_height = min($new_height, $img->getHeight());
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}
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elseif ($scale == 'up')
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{
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$new_width = max($new_width, $img->getWidth());
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$new_height = max($new_height, $img->getHeight());
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}
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$new = WideImage::createTrueColorImage($new_width, $new_height);
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if ($img->isTrueColor())
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{
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if ($color === null)
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$color = $new->allocateColorAlpha(0, 0, 0, 127);
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}
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else
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{
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imagepalettecopy($new->getHandle(), $img->getHandle());
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if ($img->isTransparent())
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{
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$new->copyTransparencyFrom($img);
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$tc_rgb = $img->getTransparentColorRGB();
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$t_color = $new->allocateColorAlpha($tc_rgb);
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}
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if ($color === null)
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{
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if ($img->isTransparent())
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$color = $t_color;
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else
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$color = $new->allocateColorAlpha(255, 0, 127, 127);
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imagecolortransparent($new->getHandle(), $color);
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}
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}
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$new->fill(0, 0, $color);
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$x = WideImage_Coordinate::fix($left, $new->getWidth(), $img->getWidth());
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$y = WideImage_Coordinate::fix($top, $new->getHeight(), $img->getHeight());
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// blending for truecolor images
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if ($img->isTrueColor())
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$new->alphaBlending($merge);
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// not-blending for palette images
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if (!$merge && !$img->isTrueColor() && isset($t_color))
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$new->getCanvas()->filledRectangle($x, $y, $x + $img->getWidth(), $y + $img->getHeight(), $t_color);
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$img->copyTo($new, $x, $y);
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return $new;
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}
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}
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