File class\libraries\vendor\smottt\wideimage\lib\WideImage\Operation\ResizeCanvas.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\WideImage;
27:	use WideImage\Coordinate;
28:
29:	/**
30:	* ResizeCanvas operation class
31:	*
32:	* @package Internal/Operations
33:	*/
34:	class ResizeCanvas
35:	{
36:	/**
37:	* Returns an image with a resized canvas
38:	*
39:	* The image is filled with $color. Use $scale to determine, when to resize.
40:	*
41:	* @param \WideImage\Image $img
42:	* @param smart_coordinate $width
43:	* @param smart_coordinate $height
44:	* @param smart_coordinate $left
45:	* @param smart_coordinate $top
46:	* @param int $color
47:	* @param string $scale 'up', 'down', 'any'
48:	* @param boolean $merge
49:	* @return \WideImage\Image
50:	*/
51:	public function execute($img, $width, $height, $left, $top, $color, $scale, $merge)
52:	{
53:	$new_width = Coordinate::fix($width, $img->getWidth());
54:	$new_height = Coordinate::fix($height, $img->getHeight());
55:
56:	if ($scale == 'down') {
57:	$new_width = min($new_width, $img->getWidth());
58:	$new_height = min($new_height, $img->getHeight());
59:	} elseif ($scale == 'up') {
60:	$new_width = max($new_width, $img->getWidth());
61:	$new_height = max($new_height, $img->getHeight());
62:	}
63:
64:	$new = WideImage::createTrueColorImage($new_width, $new_height);
65:
66:	if ($img->isTrueColor()) {
67:	if ($color === null) {
68:	$color = $new->allocateColorAlpha(0, 0, 0, 127);
69:	}
70:	} else {
71:	imagepalettecopy($new->getHandle(), $img->getHandle());
72:
73:	if ($img->isTransparent()) {
74:	$new->copyTransparencyFrom($img);
75:	$tc_rgb = $img->getTransparentColorRGB();
76:	$t_color = $new->allocateColorAlpha($tc_rgb);
77:	}
78:
79:	if ($color === null) {
80:	if ($img->isTransparent()) {
81:	$color = $t_color;
82:	} else {
83:	$color = $new->allocateColorAlpha(255, 0, 127, 127);
84:	}
85:
86:	imagecolortransparent($new->getHandle(), $color);
87:	}
88:	}
89:
90:	$new->fill(0, 0, $color);
91:
92:	$x = Coordinate::fix($left, $new->getWidth(), $img->getWidth());
93:	$y = Coordinate::fix($top, $new->getHeight(), $img->getHeight());
94:
95:	// blending for truecolor images
96:	if ($img->isTrueColor()) {
97:	$new->alphaBlending($merge);
98:	}
99:
100:	// not-blending for palette images
101:	if (!$merge && !$img->isTrueColor() && isset($t_color)) {
102:	$new->getCanvas()->filledRectangle($x, $y, $x + $img->getWidth(), $y + $img->getHeight(), $t_color);
103:	}
104:
105:	$img->copyTo($new, $x, $y);
106:
107:	return $new;
108:	}
109:	}
110:

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