File class\libraries\vendor\smottt\wideimage\lib\WideImage\Operation\ApplyMask.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:
28:	/**
29:	* ApplyMask operation class
30:	*
31:	* @package Internal/Operations
32:	*/
33:	class ApplyMask
34:	{
35:	/**
36:	* Applies a mask on the copy of source image
37:	*
38:	* @param \WideImage\Image $image
39:	* @param \WideImage\Image $mask
40:	* @param smart_coordinate $left
41:	* @param smart_coordinate $top
42:	* @return \WideImage\Image
43:	*/
44:	public function execute($image, $mask, $left = 0, $top = 0)
45:	{
46:	$left = Coordinate::fix($left, $image->getWidth(), $mask->getWidth());
47:	$top = Coordinate::fix($top, $image->getHeight(), $mask->getHeight());
48:
49:	$width = $image->getWidth();
50:	$mask_width = $mask->getWidth();
51:
52:	$height = $image->getHeight();
53:	$mask_height = $mask->getHeight();
54:
55:	$result = $image->asTrueColor();
56:
57:	$result->alphaBlending(false);
58:	$result->saveAlpha(true);
59:
60:	$srcTransparentColor = $result->getTransparentColor();
61:
62:	if ($srcTransparentColor >= 0) {
63:	$destTransparentColor = $srcTransparentColor;
64:	} else {
65:	$destTransparentColor = $result->allocateColorAlpha(255, 255, 255, 127);
66:	}
67:
68:	for ($x = 0; $x < $width; $x++) {
69:	for ($y = 0; $y < $height; $y++) {
70:	$mx = $x - $left;
71:	$my = $y - $top;
72:
73:	if ($mx >= 0 && $mx < $mask_width && $my >= 0 && $my < $mask_height) {
74:	$srcColor = $image->getColorAt($x, $y);
75:
76:	if ($srcColor == $srcTransparentColor) {
77:	$destColor = $destTransparentColor;
78:	} else {
79:	$maskRGB = $mask->getRGBAt($mx, $my);
80:
81:	if ($maskRGB['red'] == 0) {
82:	$destColor = $destTransparentColor;
83:	} elseif ($srcColor >= 0) {
84:	$imageRGB = $image->getRGBAt($x, $y);
85:	$level = ($maskRGB['red'] / 255) * (1 - $imageRGB['alpha'] / 127);
86:	$imageRGB['alpha'] = 127 - round($level * 127);
87:
88:	if ($imageRGB['alpha'] == 127) {
89:	$destColor = $destTransparentColor;
90:	} else {
91:	$destColor = $result->allocateColorAlpha($imageRGB);
92:	}
93:	} else {
94:	$destColor = $destTransparentColor;
95:	}
96:	}
97:
98:	$result->setColorAt($x, $y, $destColor);
99:	}
100:	}
101:	}
102:
103:	return $result;
104:	}
105:	}
106:

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