forked from moodle/moodle
-
Notifications
You must be signed in to change notification settings - Fork 0
/
gdlib.php
339 lines (294 loc) · 11.5 KB
/
gdlib.php
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
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* gdlib.php - Collection of routines in Moodle related to
* processing images using GD
*
* @package moodlecore
* @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
/**
*
* long description
* @global object
* @param object $dst_img
* @param object $src_img
* @param int $dst_x
* @param int $dst_y
* @param int $src_x
* @param int $src_y
* @param int $dst_w
* @param int $dst_h
* @param int $src_w
* @param int $src_h
* @return bool
* @todo Finish documenting this function
*/
function ImageCopyBicubic ($dst_img, $src_img, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h) {
global $CFG;
if (function_exists('ImageCopyResampled') and $CFG->gdversion >= 2) {
return ImageCopyResampled($dst_img, $src_img, $dst_x, $dst_y, $src_x, $src_y,
$dst_w, $dst_h, $src_w, $src_h);
}
$totalcolors = imagecolorstotal($src_img);
for ($i=0; $i<$totalcolors; $i++) {
if ($colors = ImageColorsForIndex($src_img, $i)) {
ImageColorAllocate($dst_img, $colors['red'], $colors['green'], $colors['blue']);
}
}
$scaleX = ($src_w - 1) / $dst_w;
$scaleY = ($src_h - 1) / $dst_h;
$scaleX2 = $scaleX / 2.0;
$scaleY2 = $scaleY / 2.0;
for ($j = 0; $j < $dst_h; $j++) {
$sY = $j * $scaleY;
for ($i = 0; $i < $dst_w; $i++) {
$sX = $i * $scaleX;
$c1 = ImageColorsForIndex($src_img,ImageColorAt($src_img,(int)$sX,(int)$sY+$scaleY2));
$c2 = ImageColorsForIndex($src_img,ImageColorAt($src_img,(int)$sX,(int)$sY));
$c3 = ImageColorsForIndex($src_img,ImageColorAt($src_img,(int)$sX+$scaleX2,(int)$sY+$scaleY2));
$c4 = ImageColorsForIndex($src_img,ImageColorAt($src_img,(int)$sX+$scaleX2,(int)$sY));
$red = (int) (($c1['red'] + $c2['red'] + $c3['red'] + $c4['red']) / 4);
$green = (int) (($c1['green'] + $c2['green'] + $c3['green'] + $c4['green']) / 4);
$blue = (int) (($c1['blue'] + $c2['blue'] + $c3['blue'] + $c4['blue']) / 4);
$color = ImageColorClosest ($dst_img, $red, $green, $blue);
ImageSetPixel ($dst_img, $i + $dst_x, $j + $dst_y, $color);
}
}
}
/**
* Delete profile images associated with user or group
*
* @global object
* @param int $id user or group id
* @param string $dir type of entity - 'groups' or 'users'
* @return boolean success
*/
function delete_profile_image($id, $dir='users') {
global $CFG;
require_once $CFG->libdir.'/filelib.php';
$location = $CFG->dataroot .'/'. $dir .'/'. $id;
if (file_exists($location)) {
return fulldelete($location);
}
return true;
}
/**
* Given an upload manager with the right settings, this function performs a virus scan, and then scales and crops
* it and saves it in the right place to be a "user" or "group" image.
*
* @global object
* @param int $id user or group id
* @param string $dir type of entity - groups, user, ...
* @return string $destination (profile image destination path) or false on error
*/
function create_profile_image_destination($id, $dir='user') {
global $CFG;
umask(0000);
if (!file_exists($CFG->dataroot .'/'. $dir)) {
if (!mkdir($CFG->dataroot .'/'. $dir, $CFG->directorypermissions)) {
return false;
}
}
if ($dir == 'user') {
$destination = make_user_directory($id, true);
} else {
$destination = "$CFG->dataroot/$dir/$id";
}
if (!file_exists($destination)) {
if (!make_upload_directory(str_replace($CFG->dataroot . '/', '', $destination))) {
return false;
}
}
return $destination;
}
/**
* Given an upload manager with the right settings, this function performs a virus scan, and then scales and crops
* it and saves it in the right place to be a "user" or "group" image.
*
* @param int $id user or group id
* @param object $userform with imagefile upload field
* @param string $dir type of entity - groups, user, ...
* @return boolean success
*/
function save_profile_image($id, $userform, $dir='user') {
$destination = create_profile_image_destination($id, $dir);
if ($destination === false) {
return false;
}
$filename = $userform->get_new_filename('imagefile');
$pathname = $destination.'/'.$filename;
if (!$userform->save_file('imagefile', $pathname, true)) {
return false;
}
return process_profile_image($pathname, $destination);
}
/**
* Given a path to an image file this function scales and crops it and saves it in
* the right place to be a "user" or "group" image.
*
* @global object
* @param string $originalfile the path of the original image file
* @param string $destination the final destination directory of the profile image
* @return boolean
*/
function process_profile_image($originalfile, $destination) {
global $CFG, $OUTPUT;
if(!(is_file($originalfile) && is_dir($destination))) {
return false;
}
if (empty($CFG->gdversion)) {
return false;
}
$imageinfo = GetImageSize($originalfile);
if (empty($imageinfo)) {
if (file_exists($originalfile)) {
unlink($originalfile);
}
return false;
}
$image->width = $imageinfo[0];
$image->height = $imageinfo[1];
$image->type = $imageinfo[2];
switch ($image->type) {
case IMAGETYPE_GIF:
if (function_exists('ImageCreateFromGIF')) {
$im = ImageCreateFromGIF($originalfile);
} else {
notice('GIF not supported on this server');
unlink($originalfile);
return false;
}
break;
case IMAGETYPE_JPEG:
if (function_exists('ImageCreateFromJPEG')) {
$im = ImageCreateFromJPEG($originalfile);
} else {
notice('JPEG not supported on this server');
unlink($originalfile);
return false;
}
break;
case IMAGETYPE_PNG:
if (function_exists('ImageCreateFromPNG')) {
$im = ImageCreateFromPNG($originalfile);
} else {
notice('PNG not supported on this server');
unlink($originalfile);
return false;
}
break;
default:
unlink($originalfile);
return false;
}
unlink($originalfile);
if (function_exists('ImageCreateTrueColor') and $CFG->gdversion >= 2) {
$im1 = ImageCreateTrueColor(100,100);
$im2 = ImageCreateTrueColor(35,35);
} else {
$im1 = ImageCreate(100,100);
$im2 = ImageCreate(35,35);
}
$cx = $image->width / 2;
$cy = $image->height / 2;
if ($image->width < $image->height) {
$half = floor($image->width / 2.0);
} else {
$half = floor($image->height / 2.0);
}
ImageCopyBicubic($im1, $im, 0, 0, $cx-$half, $cy-$half, 100, 100, $half*2, $half*2);
ImageCopyBicubic($im2, $im, 0, 0, $cx-$half, $cy-$half, 35, 35, $half*2, $half*2);
if (function_exists('ImageJpeg')) {
@touch($destination .'/f1.jpg'); // Helps in Safe mode
@touch($destination .'/f2.jpg'); // Helps in Safe mode
if (ImageJpeg($im1, $destination .'/f1.jpg', 90) and
ImageJpeg($im2, $destination .'/f2.jpg', 95) ) {
@chmod($destination .'/f1.jpg', 0666);
@chmod($destination .'/f2.jpg', 0666);
return 1;
}
} else {
echo $OUTPUT->notification('PHP has not been configured to support JPEG images. Please correct this.');
}
return 0;
}
/**
* Given a user id this function scales and crops the user images to remove
* the one pixel black border.
*
* @global object
* @param int $id
* @param string $dir
* @return boolean
*/
function upgrade_profile_image($id, $dir='users') {
global $CFG, $OUTPUT;
$im = ImageCreateFromJPEG($CFG->dataroot .'/'. $dir .'/'. $id .'/f1.jpg');
if (function_exists('ImageCreateTrueColor') and $CFG->gdversion >= 2) {
$im1 = ImageCreateTrueColor(100,100);
$im2 = ImageCreateTrueColor(35,35);
} else {
$im1 = ImageCreate(100,100);
$im2 = ImageCreate(35,35);
}
if (function_exists('ImageCopyResampled') and $CFG->gdversion >= 2) {
ImageCopyBicubic($im1, $im, 0, 0, 2, 2, 100, 100, 96, 96);
} else {
imagecopy($im1, $im, 0, 0, 0, 0, 100, 100);
$c = ImageColorsForIndex($im1,ImageColorAt($im1,2,2));
$color = ImageColorClosest ($im1, $c['red'], $c['green'], $c['blue']);
ImageSetPixel ($im1, 0, 0, $color);
$c = ImageColorsForIndex($im1,ImageColorAt($im1,2,97));
$color = ImageColorClosest ($im1, $c['red'], $c['green'], $c['blue']);
ImageSetPixel ($im1, 0, 99, $color);
$c = ImageColorsForIndex($im1,ImageColorAt($im1,97,2));
$color = ImageColorClosest ($im1, $c['red'], $c['green'], $c['blue']);
ImageSetPixel ($im1, 99, 0, $color);
$c = ImageColorsForIndex($im1,ImageColorAt($im1,97,97));
$color = ImageColorClosest ($im1, $c['red'], $c['green'], $c['blue']);
ImageSetPixel ($im1, 99, 99, $color);
for ($x = 1; $x < 99; $x++) {
$c1 = ImageColorsForIndex($im1,ImageColorAt($im,$x,1));
$color = ImageColorClosest ($im, $c1['red'], $c1['green'], $c1['blue']);
ImageSetPixel ($im1, $x, 0, $color);
$c2 = ImageColorsForIndex($im1,ImageColorAt($im1,$x,98));
$color = ImageColorClosest ($im, $c2['red'], $c2['green'], $c2['blue']);
ImageSetPixel ($im1, $x, 99, $color);
}
for ($y = 1; $y < 99; $y++) {
$c3 = ImageColorsForIndex($im1,ImageColorAt($im, 1, $y));
$color = ImageColorClosest ($im, $c3['red'], $c3['green'], $c3['blue']);
ImageSetPixel ($im1, 0, $y, $color);
$c4 = ImageColorsForIndex($im1,ImageColorAt($im1, 98, $y));
$color = ImageColorClosest ($im, $c4['red'], $c4['green'], $c4['blue']);
ImageSetPixel ($im1, 99, $y, $color);
}
}
ImageCopyBicubic($im2, $im, 0, 0, 2, 2, 35, 35, 96, 96);
if (function_exists('ImageJpeg')) {
if (ImageJpeg($im1, $CFG->dataroot .'/'. $dir .'/'. $id .'/f1.jpg', 90) and
ImageJpeg($im2, $CFG->dataroot .'/'. $dir .'/'. $id .'/f2.jpg', 95) ) {
@chmod($CFG->dataroot .'/'. $dir .'/'. $id .'/f1.jpg', 0666);
@chmod($CFG->dataroot .'/'. $dir .'/'. $id .'/f2.jpg', 0666);
return 1;
}
} else {
echo $OUTPUT->notification('PHP has not been configured to support JPEG images. Please correct this.');
}
return 0;
}