File class\libraries\vendor\smottt\wideimage\lib\WideImage\Operation\Crop.php

1:	<?php
2:	/**
3:	##DOC-SIGNATURE##
4:
5:	This file is part of WideImage.
6:
7:	WideImage is free software; you can redistribute it and/or modify
8:	it under the terms of the GNU Lesser General Public License as published by
9:	the Free Software Foundation; either version 2.1 of the License, or
10:	(at your option) any later version.
11:
12:	WideImage is distributed in the hope that it will be useful,
13:	but WITHOUT ANY WARRANTY; without even the implied warranty of
14:	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15:	GNU Lesser General Public License for more details.
16:
17:	You should have received a copy of the GNU Lesser General Public License
18:	along with WideImage; if not, write to the Free Software
19:	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20:
21:	* @package Internal/Operations
22:	**/
23:
24:	namespace WideImage\Operation;
25:
26:	use WideImage\Coordinate;
27:	use WideImage\PaletteImage;
28:	use WideImage\Exception\Exception;
29:	use WideImage\Exception\GDFunctionResultException;
30:
31:	/**
32:	* Crop operation class
33:	*
34:	* @package Internal/Operations
35:	*/
36:	class Crop
37:	{
38:	/**
39:	* Returns a cropped image
40:	*
41:	* @param \WideImage\Image $img
42:	* @param smart_coordinate $left
43:	* @param smart_coordinate $top
44:	* @param smart_coordinate $width
45:	* @param smart_coordinate $height
46:	* @return \WideImage\Image
47:	*/
48:	public function execute($img, $left, $top, $width, $height)
49:	{
50:	$width = Coordinate::fix($width, $img->getWidth(), $width);
51:	$height = Coordinate::fix($height, $img->getHeight(), $height);
52:	$left = Coordinate::fix($left, $img->getWidth(), $width);
53:	$top = Coordinate::fix($top, $img->getHeight(), $height);
54:
55:	if ($left < 0) {
56:	$width = $left + $width;
57:	$left = 0;
58:	}
59:
60:	if ($width > $img->getWidth() - $left) {
61:	$width = $img->getWidth() - $left;
62:	}
63:
64:	if ($top < 0) {
65:	$height = $top + $height;
66:	$top = 0;
67:	}
68:
69:	if ($height > $img->getHeight() - $top) {
70:	$height = $img->getHeight() - $top;
71:	}
72:
73:	if ($width <= 0 \|\| $height <= 0) {
74:	throw new Exception("Can't crop outside of an image.");
75:	}
76:
77:	$new = $img->doCreate($width, $height);
78:
79:	if ($img->isTransparent() \|\| $img instanceof PaletteImage) {
80:	$new->copyTransparencyFrom($img);
81:
82:	if (!imagecopyresized($new->getHandle(), $img->getHandle(), 0, 0, $left, $top, $width, $height, $width, $height)) {
83:	throw new GDFunctionResultException("imagecopyresized() returned false");
84:	}
85:	} else {
86:	$new->alphaBlending(false);
87:	$new->saveAlpha(true);
88:
89:	if (!imagecopyresampled($new->getHandle(), $img->getHandle(), 0, 0, $left, $top, $width, $height, $width, $height)) {
90:	throw new GDFunctionResultException("imagecopyresampled() returned false");
91:	}
92:	}
93:
94:	return $new;
95:	}
96:	}
97:

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