File class\libraries\vendor\smottt\wideimage\lib\WideImage\Operation\Resize.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\TrueColorImage;
29:	use WideImage\Exception\GDFunctionResultException;
30:	use WideImage\Operation\Exception\InvalidFitMethodException;
31:	use WideImage\Operation\Exception\InvalidResizeDimensionException;
32:
33:	/**
34:	* Resize operation class
35:	*
36:	* @package Internal/Operations
37:	*/
38:	class Resize
39:	{
40:	/**
41:	* Prepares and corrects smart coordinates
42:	*
43:	* @param \WideImage\Image $img
44:	* @param smart_coordinate $width
45:	* @param smart_coordinate $height
46:	* @param string $fit
47:	* @return array
48:	*/
49:	protected function prepareDimensions($img, $width, $height, $fit)
50:	{
51:	if ($width === null && $height === null) {
52:	return array('width' => $img->getWidth(), 'height' => $img->getHeight());
53:	}
54:
55:	if ($width !== null) {
56:	$width = Coordinate::fix($width, $img->getWidth());
57:	$rx = $img->getWidth() / $width;
58:	} else {
59:	$rx = null;
60:	}
61:
62:	if ($height !== null) {
63:	$height = Coordinate::fix($height, $img->getHeight());
64:	$ry = $img->getHeight() / $height;
65:	} else {
66:	$ry = null;
67:	}
68:
69:	if ($rx === null && $ry !== null) {
70:	$rx = $ry;
71:	$width = round($img->getWidth() / $rx);
72:	}
73:
74:	if ($ry === null && $rx !== null) {
75:	$ry = $rx;
76:	$height = round($img->getHeight() / $ry);
77:	}
78:
79:	if ($width === 0 \|\| $height === 0) {
80:	return array('width' => 0, 'height' => 0);
81:	}
82:
83:	if ($fit == null) {
84:	$fit = 'inside';
85:	}
86:
87:	$dim = array();
88:
89:	if ($fit == 'fill') {
90:	$dim['width'] = $width;
91:	$dim['height'] = $height;
92:	} elseif ($fit == 'inside' \|\| $fit == 'outside') {
93:	if ($fit == 'inside') {
94:	$ratio = ($rx > $ry) ? $rx : $ry;
95:	} else {
96:	$ratio = ($rx < $ry) ? $rx : $ry;
97:	}
98:
99:	$dim['width'] = round($img->getWidth() / $ratio);
100:	$dim['height'] = round($img->getHeight() / $ratio);
101:	} else {
102:	throw new InvalidFitMethodException("{$fit} is not a valid resize-fit method.");
103:	}
104:
105:	return $dim;
106:	}
107:
108:	/**
109:	* Returns a resized image
110:	*
111:	* @param \WideImage\Image $img
112:	* @param smart_coordinate $width
113:	* @param smart_coordinate $height
114:	* @param string $fit
115:	* @param string $scale
116:	* @return \WideImage\Image
117:	*/
118:	public function execute($img, $width, $height, $fit, $scale)
119:	{
120:	$dim = $this->prepareDimensions($img, $width, $height, $fit);
121:
122:	if (($scale === 'down' && ($dim['width'] >= $img->getWidth() && $dim['height'] >= $img->getHeight())) \|\|
123:	($scale === 'up' && ($dim['width'] <= $img->getWidth() && $dim['height'] <= $img->getHeight()))) {
124:	$dim = array('width' => $img->getWidth(), 'height' => $img->getHeight());
125:	}
126:
127:	if ($dim['width'] <= 0 \|\| $dim['height'] <= 0) {
128:	throw new InvalidResizeDimensionException("Both dimensions must be larger than 0.");
129:	}
130:
131:	if ($img->isTransparent() \|\| $img instanceof PaletteImage) {
132:	$new = PaletteImage::create($dim['width'], $dim['height']);
133:	$new->copyTransparencyFrom($img);
134:
135:	if (!imagecopyresized(
136:	$new->getHandle(),
137:	$img->getHandle(),
138:	0, 0, 0, 0,
139:	$new->getWidth(),
140:	$new->getHeight(),
141:	$img->getWidth(),
142:	$img->getHeight())) {
143:	throw new GDFunctionResultException("imagecopyresized() returned false");
144:	}
145:	} else {
146:	$new = TrueColorImage::create($dim['width'], $dim['height']);
147:	$new->alphaBlending(false);
148:	$new->saveAlpha(true);
149:
150:	if (!imagecopyresampled(
151:	$new->getHandle(),
152:	$img->getHandle(),
153:	0, 0, 0, 0,
154:	$new->getWidth(),
155:	$new->getHeight(),
156:	$img->getWidth(),
157:	$img->getHeight())) {
158:	throw new GDFunctionResultException("imagecopyresampled() returned false");
159:	}
160:
161:	$new->alphaBlending(true);
162:	}
163:
164:	return $new;
165:	}
166:	}
167:

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