1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
<?php
function get_gd_version()
{
return GD_VERSION;
}
function get_php_info()
{
ob_start();
phpinfo();
$info = ob_get_contents();
ob_end_clean();
return $info;
}
function get_freetype_version()
{
$version = 0;
if (preg_match(',FreeType Version => (\d+\.\d+\.\d+),s', get_php_info(), $match)) {
$version = $match[1];
}
return $version;
}
function get_libjpeg_version()
{
$version = 0;
if (preg_match(',libJPEG Version => ([a-z0-9]+),s', get_php_info(), $match)) {
$version = $match[1];
}
return $version;
}
function get_libpng_version()
{
$version = 0;
if (preg_match(',libPNG Version => (\d+\.\d+\.\d+),s', get_php_info(), $match)) {
$version = $match[1];
}
return $version;
}
function get_libxpm_version()
{
$version = 0;
if (preg_match(',libXpm Version => (\d+),s', get_php_info(), $match)) {
$version = $match[1];
}
return $version;
}
/**
* Tests that an in-memory image equals a PNG file.
*
* It checks for equal image sizes, and whether any pixels are different.
* The textual result is printed, so the EXPECT section should contain the line
* "The images are equal."
*
* If the PNG file does not exists, or the images are not equal, a diagnostic
* message is printed, and the actual file is stored right beside the temporary
* .php test file with the extension .out.png, to be able to manually inspect
* the result.
*
* @param string $filename
* @param resource $actual
* @return void
*/
function test_image_equals_file($filename, $actual)
{
if (!file_exists($filename)) {
echo "The expected image does not exist.\n";
save_actual_image($actual);
return;
}
$actual = test_to_truecolor($actual);
$expected = imagecreatefrompng($filename);
$expected = test_to_truecolor($expected);
$exp_x = imagesx($expected);
$exp_y = imagesy($expected);
$act_x = imagesx($actual);
$act_y = imagesy($actual);
if ($exp_x != $act_x || $exp_y != $act_y) {
echo "The image size differs: expected {$exp_x}x{$exp_y}, got {$act_x}x{$act_y}.\n";
save_actual_image($actual);
return;
}
$pixels_changed = 0;
for ($y = 0; $y < $exp_y; $y++) {
for ($x = 0; $x < $exp_x; $x ++) {
$exp_c = imagecolorat($expected, $x, $y);
$act_c = imagecolorat($actual, $x, $y);
if ($exp_c != $act_c) {
$pixels_changed++;
}
}
}
if (!$pixels_changed) {
echo "The images are equal.\n";
} else {
echo "The images differ in {$pixels_changed} pixels.\n";
save_actual_image($actual);
}
}
/**
* Returns the truecolor version of an image.
*
* @param resource $image
* @return resource
*/
function test_to_truecolor($image)
{
if (imageistruecolor($image)) {
return $image;
} else {
$width = imagesx($image);
$height = imagesy($image);
$result = imagecreatetruecolor($width, $height);
imagecopy($result, $image, 0,0, 0,0, $width, $height);
return $result;
}
}
/**
* Saves an actual image to disk.
*
* The image is saved right beside the temporary .php test file with the
* extension .out.png.
*
* @param resource $image
* @return void
*/
function save_actual_image($image)
{
$pathinfo = pathinfo($_SERVER['SCRIPT_FILENAME']);
$filename = "{$pathinfo['dirname']}/{$pathinfo['filename']}.out.png";
imagepng($image, $filename);
}
|
