quickwebp / includes / vendor / intervention / image / src / Intervention / Image / Gd / Decoder.php

Decoder.php in QuickWebP – WebP & AVIF Image Optimizer, Compression & SEO for WordPress 2.0.0, at includes/vendor/intervention/image/src/Intervention/Image/Gd/Decoder.php

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1	<?php
2
3	namespace Intervention\Image\Gd;
4
5	use Intervention\Image\Exception\NotReadableException;
6	use Intervention\Image\Exception\NotSupportedException;
7	use Intervention\Image\Image;
8
9	class Decoder extends \Intervention\Image\AbstractDecoder
10	{
11	/**
12	* Initiates new image from path in filesystem
13	*
14	* @param string $path
15	* @return \Intervention\Image\Image
16	*/
17	public function initFromPath($path)
18	{
19	if ( ! file_exists($path)) {
20	throw new NotReadableException(
21	"Unable to find file ({$path})."
22	);
23	}
24
25	// get mime type of file
26	$mime = finfo_file(finfo_open(FILEINFO_MIME_TYPE), $path);
27
28	// define core
29	switch (strtolower($mime)) {
30	case 'image/png':
31	case 'image/x-png':
32	$core = @imagecreatefrompng($path);
33	break;
34
35	case 'image/jpg':
36	case 'image/jpeg':
37	case 'image/pjpeg':
38	$core = @imagecreatefromjpeg($path);
39	if (!$core) {
40	$core= @imagecreatefromstring(file_get_contents($path));
41	}
42	break;
43
44	case 'image/gif':
45	$core = @imagecreatefromgif($path);
46	break;
47
48	case 'image/webp':
49	case 'image/x-webp':
50	if ( ! function_exists('imagecreatefromwebp')) {
51	throw new NotReadableException(
52	"Unsupported image type. GD/PHP installation does not support WebP format."
53	);
54	}
55	$core = @imagecreatefromwebp($path);
56	break;
57
58	case 'image/bmp':
59	case 'image/ms-bmp':
60	case 'image/x-bitmap':
61	case 'image/x-bmp':
62	case 'image/x-ms-bmp':
63	case 'image/x-win-bitmap':
64	case 'image/x-windows-bmp':
65	case 'image/x-xbitmap':
66	if (! function_exists('imagecreatefrombmp')) {
67	throw new NotReadableException(
68	"Unsupported image type. GD/PHP installation does not support BMP format."
69	);
70	}
71	$core = @imagecreatefrombmp($path);
72	break;
73
74	default:
75	throw new NotReadableException(
76	sprintf("Unsupported image type %s. GD driver is only able to decode JPG, PNG, GIF, BMP or WebP files.", strtolower($mime))
77	);
78	}
79
80	if (empty($core)) {
81	throw new NotReadableException(
82	"Unable to decode image from file ({$path})."
83	);
84	}
85
86	$this->gdResourceToTruecolor($core);
87
88	// build image
89	$image = $this->initFromGdResource($core);
90	$image->mime = $mime;
91	$image->setFileInfoFromPath($path);
92
93	return $image;
94	}
95
96	/**
97	* Initiates new image from GD resource
98	*
99	* @param Resource $resource
100	* @return \Intervention\Image\Image
101	*/
102	public function initFromGdResource($resource)
103	{
104	return new Image(new Driver, $resource);
105	}
106
107	/**
108	* Initiates new image from Imagick object
109	*
110	* @param Imagick $object
111	* @return \Intervention\Image\Image
112	*/
113	public function initFromImagick(\Imagick $object)
114	{
115	throw new NotSupportedException(
116	"Gd driver is unable to init from Imagick object."
117	);
118	}
119
120	/**
121	* Initiates new image from binary data
122	*
123	* @param string $data
124	* @return \Intervention\Image\Image
125	*/
126	public function initFromBinary($binary)
127	{
128	$resource = @imagecreatefromstring($binary);
129
130	if ($resource === false) {
131	throw new NotReadableException(
132	"Unable to init from given binary data."
133	);
134	}
135
136	$image = $this->initFromGdResource($resource);
137	$image->mime = finfo_buffer(finfo_open(FILEINFO_MIME_TYPE), $binary);
138
139	return $image;
140	}
141
142	/**
143	* Transform GD resource into Truecolor version
144	*
145	* @param resource $resource
146	* @return bool
147	*/
148	public function gdResourceToTruecolor(&$resource)
149	{
150	$width = imagesx($resource);
151	$height = imagesy($resource);
152
153	// new canvas
154	$canvas = imagecreatetruecolor($width, $height);
155
156	// fill with transparent color
157	imagealphablending($canvas, false);
158	$transparent = imagecolorallocatealpha($canvas, 255, 255, 255, 127);
159	imagefilledrectangle($canvas, 0, 0, $width, $height, $transparent);
160	imagecolortransparent($canvas, $transparent);
161	imagealphablending($canvas, true);
162
163	// copy original
164	imagecopy($canvas, $resource, 0, 0, 0, 0, $width, $height);
165	imagedestroy($resource);
166
167	$resource = $canvas;
168
169	return true;
170	}
171	}
172