forked from JamesHeinrich/phpThumb
-
Notifications
You must be signed in to change notification settings - Fork 0
/
phpthumb.bmp.php
870 lines (766 loc) · 36.6 KB
/
phpthumb.bmp.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
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <[email protected]> //
// available at http://getid3.sourceforge.net //
// or http://www.getid3.org //
/////////////////////////////////////////////////////////////////
// See readme.txt for more details //
/////////////////////////////////////////////////////////////////
// //
// module.graphic.bmp.php //
// module for analyzing BMP Image files //
// dependencies: NONE //
// ///
/////////////////////////////////////////////////////////////////
// //
// Modified for use in phpThumb() - James Heinrich 2004.07.27 //
// //
/////////////////////////////////////////////////////////////////
class phpthumb_bmp {
public function phpthumb_bmp2gd(&$BMPdata, $truecolor=true) {
$ThisFileInfo = array();
if ($this->getid3_bmp($BMPdata, $ThisFileInfo, true, true)) {
$gd = $this->PlotPixelsGD($ThisFileInfo['bmp'], $truecolor);
return $gd;
}
return false;
}
public function phpthumb_bmpfile2gd($filename, $truecolor=true) {
if ($fp = @fopen($filename, 'rb')) {
$BMPdata = fread($fp, filesize($filename));
fclose($fp);
return $this->phpthumb_bmp2gd($BMPdata, $truecolor);
}
return false;
}
public function GD2BMPstring(&$gd_image) {
$imageX = imagesx($gd_image);
$imageY = imagesy($gd_image);
$BMP = '';
for ($y = ($imageY - 1); $y >= 0; $y--) {
$thisline = '';
for ($x = 0; $x < $imageX; $x++) {
$argb = phpthumb_functions::GetPixelColor($gd_image, $x, $y);
$thisline .= chr($argb['blue']).chr($argb['green']).chr($argb['red']);
}
while (strlen($thisline) % 4) {
$thisline .= "\x00";
}
$BMP .= $thisline;
}
$bmpSize = strlen($BMP) + 14 + 40;
// BITMAPFILEHEADER [14 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_62uq.asp
$BITMAPFILEHEADER = 'BM'; // WORD bfType;
$BITMAPFILEHEADER .= phpthumb_functions::LittleEndian2String($bmpSize, 4); // DWORD bfSize;
$BITMAPFILEHEADER .= phpthumb_functions::LittleEndian2String( 0, 2); // WORD bfReserved1;
$BITMAPFILEHEADER .= phpthumb_functions::LittleEndian2String( 0, 2); // WORD bfReserved2;
$BITMAPFILEHEADER .= phpthumb_functions::LittleEndian2String( 54, 4); // DWORD bfOffBits;
// BITMAPINFOHEADER - [40 bytes] http://msdn.microsoft.com/library/en-us/gdi/bitmaps_1rw2.asp
$BITMAPINFOHEADER = phpthumb_functions::LittleEndian2String( 40, 4); // DWORD biSize;
$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( $imageX, 4); // LONG biWidth;
$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( $imageY, 4); // LONG biHeight;
$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 1, 2); // WORD biPlanes;
$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 24, 2); // WORD biBitCount;
$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 0, 4); // DWORD biCompression;
$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 0, 4); // DWORD biSizeImage;
$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 2835, 4); // LONG biXPelsPerMeter;
$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 2835, 4); // LONG biYPelsPerMeter;
$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 0, 4); // DWORD biClrUsed;
$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 0, 4); // DWORD biClrImportant;
return $BITMAPFILEHEADER.$BITMAPINFOHEADER.$BMP;
}
public function getid3_bmp(&$BMPdata, &$ThisFileInfo, $ExtractPalette=false, $ExtractData=false) {
// shortcuts
$ThisFileInfo['bmp']['header']['raw'] = array();
$thisfile_bmp = &$ThisFileInfo['bmp'];
$thisfile_bmp_header = &$thisfile_bmp['header'];
$thisfile_bmp_header_raw = &$thisfile_bmp_header['raw'];
// BITMAPFILEHEADER [14 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_62uq.asp
// all versions
// WORD bfType;
// DWORD bfSize;
// WORD bfReserved1;
// WORD bfReserved2;
// DWORD bfOffBits;
$offset = 0;
$overalloffset = 0;
$BMPheader = substr($BMPdata, $overalloffset, 14 + 40);
$overalloffset += (14 + 40);
$thisfile_bmp_header_raw['identifier'] = substr($BMPheader, $offset, 2);
$offset += 2;
if ($thisfile_bmp_header_raw['identifier'] != 'BM') {
$ThisFileInfo['error'][] = 'Expecting "BM" at offset '. (int) (@$ThisFileInfo[ 'avdataoffset']) .', found "'. $thisfile_bmp_header_raw[ 'identifier'].'"';
unset($ThisFileInfo['fileformat']);
unset($ThisFileInfo['bmp']);
return false;
}
$thisfile_bmp_header_raw['filesize'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['reserved1'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$thisfile_bmp_header_raw['reserved2'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$thisfile_bmp_header_raw['data_offset'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['header_size'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
// check if the hardcoded-to-1 "planes" is at offset 22 or 26
$planes22 = $this->LittleEndian2Int(substr($BMPheader, 22, 2));
$planes26 = $this->LittleEndian2Int(substr($BMPheader, 26, 2));
if (($planes22 == 1) && ($planes26 != 1)) {
$thisfile_bmp['type_os'] = 'OS/2';
$thisfile_bmp['type_version'] = 1;
} elseif (($planes26 == 1) && ($planes22 != 1)) {
$thisfile_bmp['type_os'] = 'Windows';
$thisfile_bmp['type_version'] = 1;
} elseif ($thisfile_bmp_header_raw['header_size'] == 12) {
$thisfile_bmp['type_os'] = 'OS/2';
$thisfile_bmp['type_version'] = 1;
} elseif ($thisfile_bmp_header_raw['header_size'] == 40) {
$thisfile_bmp['type_os'] = 'Windows';
$thisfile_bmp['type_version'] = 1;
} elseif ($thisfile_bmp_header_raw['header_size'] == 84) {
$thisfile_bmp['type_os'] = 'Windows';
$thisfile_bmp['type_version'] = 4;
} elseif ($thisfile_bmp_header_raw['header_size'] == 100) {
$thisfile_bmp['type_os'] = 'Windows';
$thisfile_bmp['type_version'] = 5;
} else {
$ThisFileInfo['error'][] = 'Unknown BMP subtype (or not a BMP file)';
unset($ThisFileInfo['fileformat']);
unset($ThisFileInfo['bmp']);
return false;
}
$ThisFileInfo['fileformat'] = 'bmp';
$ThisFileInfo['video']['dataformat'] = 'bmp';
$ThisFileInfo['video']['lossless'] = true;
$ThisFileInfo['video']['pixel_aspect_ratio'] = (float) 1;
if ($thisfile_bmp['type_os'] == 'OS/2') {
// OS/2-format BMP
// http://netghost.narod.ru/gff/graphics/summary/os2bmp.htm
// DWORD Size; /* Size of this structure in bytes */
// DWORD Width; /* Bitmap width in pixels */
// DWORD Height; /* Bitmap height in pixel */
// WORD NumPlanes; /* Number of bit planes (color depth) */
// WORD BitsPerPixel; /* Number of bits per pixel per plane */
$thisfile_bmp_header_raw['width'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$thisfile_bmp_header_raw['height'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$thisfile_bmp_header_raw['planes'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$thisfile_bmp_header_raw['bits_per_pixel'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$ThisFileInfo['video']['resolution_x'] = $thisfile_bmp_header_raw['width'];
$ThisFileInfo['video']['resolution_y'] = $thisfile_bmp_header_raw['height'];
$ThisFileInfo['video']['codec'] = 'BI_RGB '.$thisfile_bmp_header_raw['bits_per_pixel'].'-bit';
$ThisFileInfo['video']['bits_per_sample'] = $thisfile_bmp_header_raw['bits_per_pixel'];
if ($thisfile_bmp['type_version'] >= 2) {
// DWORD Compression; /* Bitmap compression scheme */
// DWORD ImageDataSize; /* Size of bitmap data in bytes */
// DWORD XResolution; /* X resolution of display device */
// DWORD YResolution; /* Y resolution of display device */
// DWORD ColorsUsed; /* Number of color table indices used */
// DWORD ColorsImportant; /* Number of important color indices */
// WORD Units; /* Type of units used to measure resolution */
// WORD Reserved; /* Pad structure to 4-byte boundary */
// WORD Recording; /* Recording algorithm */
// WORD Rendering; /* Halftoning algorithm used */
// DWORD Size1; /* Reserved for halftoning algorithm use */
// DWORD Size2; /* Reserved for halftoning algorithm use */
// DWORD ColorEncoding; /* Color model used in bitmap */
// DWORD Identifier; /* Reserved for application use */
$thisfile_bmp_header_raw['compression'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['bmp_data_size'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['resolution_h'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['resolution_v'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['colors_used'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['colors_important'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['resolution_units'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$thisfile_bmp_header_raw['reserved1'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$thisfile_bmp_header_raw['recording'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$thisfile_bmp_header_raw['rendering'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$thisfile_bmp_header_raw['size1'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['size2'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['color_encoding'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['identifier'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header['compression'] = $this->BMPcompressionOS2Lookup($thisfile_bmp_header_raw['compression']);
$ThisFileInfo['video']['codec'] = $thisfile_bmp_header['compression'].' '.$thisfile_bmp_header_raw['bits_per_pixel'].'-bit';
}
} elseif ($thisfile_bmp['type_os'] == 'Windows') {
// Windows-format BMP
// BITMAPINFOHEADER - [40 bytes] http://msdn.microsoft.com/library/en-us/gdi/bitmaps_1rw2.asp
// all versions
// DWORD biSize;
// LONG biWidth;
// LONG biHeight;
// WORD biPlanes;
// WORD biBitCount;
// DWORD biCompression;
// DWORD biSizeImage;
// LONG biXPelsPerMeter;
// LONG biYPelsPerMeter;
// DWORD biClrUsed;
// DWORD biClrImportant;
$thisfile_bmp_header_raw['width'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['height'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['planes'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$thisfile_bmp_header_raw['bits_per_pixel'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
$offset += 2;
$thisfile_bmp_header_raw['compression'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['bmp_data_size'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['resolution_h'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['resolution_v'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['colors_used'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['colors_important'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header['compression'] = $this->BMPcompressionWindowsLookup($thisfile_bmp_header_raw['compression']);
$ThisFileInfo['video']['resolution_x'] = $thisfile_bmp_header_raw['width'];
$ThisFileInfo['video']['resolution_y'] = $thisfile_bmp_header_raw['height'];
$ThisFileInfo['video']['codec'] = $thisfile_bmp_header['compression'].' '.$thisfile_bmp_header_raw['bits_per_pixel'].'-bit';
$ThisFileInfo['video']['bits_per_sample'] = $thisfile_bmp_header_raw['bits_per_pixel'];
if (($thisfile_bmp['type_version'] >= 4) || ($thisfile_bmp_header_raw['compression'] == 3)) {
// should only be v4+, but BMPs with type_version==1 and BI_BITFIELDS compression have been seen
$BMPheader .= substr($BMPdata, $overalloffset, 44);
$overalloffset += 44;
// BITMAPV4HEADER - [44 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_2k1e.asp
// Win95+, WinNT4.0+
// DWORD bV4RedMask;
// DWORD bV4GreenMask;
// DWORD bV4BlueMask;
// DWORD bV4AlphaMask;
// DWORD bV4CSType;
// CIEXYZTRIPLE bV4Endpoints;
// DWORD bV4GammaRed;
// DWORD bV4GammaGreen;
// DWORD bV4GammaBlue;
$thisfile_bmp_header_raw['red_mask'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['green_mask'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['blue_mask'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['alpha_mask'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['cs_type'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['ciexyz_red'] = substr($BMPheader, $offset, 4);
$offset += 4;
$thisfile_bmp_header_raw['ciexyz_green'] = substr($BMPheader, $offset, 4);
$offset += 4;
$thisfile_bmp_header_raw['ciexyz_blue'] = substr($BMPheader, $offset, 4);
$offset += 4;
$thisfile_bmp_header_raw['gamma_red'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['gamma_green'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['gamma_blue'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header['ciexyz_red'] = $this->FixedPoint2_30(strrev($thisfile_bmp_header_raw['ciexyz_red']));
$thisfile_bmp_header['ciexyz_green'] = $this->FixedPoint2_30(strrev($thisfile_bmp_header_raw['ciexyz_green']));
$thisfile_bmp_header['ciexyz_blue'] = $this->FixedPoint2_30(strrev($thisfile_bmp_header_raw['ciexyz_blue']));
}
if ($thisfile_bmp['type_version'] >= 5) {
$BMPheader .= substr($BMPdata, $overalloffset, 16);
$overalloffset += 16;
// BITMAPV5HEADER - [16 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_7c36.asp
// Win98+, Win2000+
// DWORD bV5Intent;
// DWORD bV5ProfileData;
// DWORD bV5ProfileSize;
// DWORD bV5Reserved;
$thisfile_bmp_header_raw['intent'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['profile_data_offset'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['profile_data_size'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
$thisfile_bmp_header_raw['reserved3'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
$offset += 4;
}
} else {
$ThisFileInfo['error'][] = 'Unknown BMP format in header.';
return false;
}
if ($ExtractPalette || $ExtractData) {
$PaletteEntries = 0;
if ($thisfile_bmp_header_raw['bits_per_pixel'] < 16) {
$PaletteEntries = pow(2, $thisfile_bmp_header_raw['bits_per_pixel']);
} elseif (isset($thisfile_bmp_header_raw['colors_used']) && ($thisfile_bmp_header_raw['colors_used'] > 0) && ($thisfile_bmp_header_raw['colors_used'] <= 256)) {
$PaletteEntries = $thisfile_bmp_header_raw['colors_used'];
}
if ($PaletteEntries > 0) {
$BMPpalette = substr($BMPdata, $overalloffset, 4 * $PaletteEntries);
$overalloffset += 4 * $PaletteEntries;
$paletteoffset = 0;
for ($i = 0; $i < $PaletteEntries; $i++) {
// RGBQUAD - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_5f8y.asp
// BYTE rgbBlue;
// BYTE rgbGreen;
// BYTE rgbRed;
// BYTE rgbReserved;
$blue = $this->LittleEndian2Int($BMPpalette[ $paletteoffset++ ]);
$green = $this->LittleEndian2Int($BMPpalette[ $paletteoffset++ ]);
$red = $this->LittleEndian2Int($BMPpalette[ $paletteoffset++ ]);
if (($thisfile_bmp['type_os'] == 'OS/2') && ($thisfile_bmp['type_version'] == 1)) {
// no padding byte
} else {
$paletteoffset++; // padding byte
}
$thisfile_bmp['palette'][$i] = (($red << 16) | ($green << 8) | $blue);
}
}
}
if ($ExtractData) {
$RowByteLength = ceil(($thisfile_bmp_header_raw['width'] * ($thisfile_bmp_header_raw['bits_per_pixel'] / 8)) / 4) * 4; // round up to nearest DWORD boundary
$BMPpixelData = substr($BMPdata, $thisfile_bmp_header_raw['data_offset'], $thisfile_bmp_header_raw['height'] * $RowByteLength);
$overalloffset = $thisfile_bmp_header_raw['data_offset'] + ($thisfile_bmp_header_raw['height'] * $RowByteLength);
$pixeldataoffset = 0;
switch (@$thisfile_bmp_header_raw['compression']) {
case 0: // BI_RGB
switch ($thisfile_bmp_header_raw['bits_per_pixel']) {
case 1:
for ($row = ($thisfile_bmp_header_raw['height'] - 1); $row >= 0; $row--) {
for ($col = 0; $col < $thisfile_bmp_header_raw['width']; $col = $col) {
$paletteindexbyte = ord($BMPpixelData[$pixeldataoffset++]);
for ($i = 7; $i >= 0; $i--) {
$paletteindex = ($paletteindexbyte & (0x01 << $i)) >> $i;
$thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindex];
$col++;
}
}
while (($pixeldataoffset % 4) != 0) {
// lines are padded to nearest DWORD
$pixeldataoffset++;
}
}
break;
case 4:
for ($row = ($thisfile_bmp_header_raw['height'] - 1); $row >= 0; $row--) {
for ($col = 0; $col < $thisfile_bmp_header_raw['width']; $col = $col) {
$paletteindexbyte = ord($BMPpixelData[$pixeldataoffset++]);
for ($i = 1; $i >= 0; $i--) {
$paletteindex = ($paletteindexbyte & (0x0F << (4 * $i))) >> (4 * $i);
$thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindex];
$col++;
}
}
while (($pixeldataoffset % 4) != 0) {
// lines are padded to nearest DWORD
$pixeldataoffset++;
}
}
break;
case 8:
for ($row = ($thisfile_bmp_header_raw['height'] - 1); $row >= 0; $row--) {
for ($col = 0; $col < $thisfile_bmp_header_raw['width']; $col++) {
$paletteindex = ord($BMPpixelData[$pixeldataoffset++]);
$thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindex];
}
while (($pixeldataoffset % 4) != 0) {
// lines are padded to nearest DWORD
$pixeldataoffset++;
}
}
break;
case 24:
for ($row = ($thisfile_bmp_header_raw['height'] - 1); $row >= 0; $row--) {
for ($col = 0; $col < $thisfile_bmp_header_raw['width']; $col++) {
$thisfile_bmp['data'][$row][$col] = (ord($BMPpixelData[$pixeldataoffset+2]) << 16) | (ord($BMPpixelData[$pixeldataoffset+1]) << 8) | ord($BMPpixelData[$pixeldataoffset]);
$pixeldataoffset += 3;
}
while (($pixeldataoffset % 4) != 0) {
// lines are padded to nearest DWORD
$pixeldataoffset++;
}
}
break;
case 32:
for ($row = ($thisfile_bmp_header_raw['height'] - 1); $row >= 0; $row--) {
for ($col = 0; $col < $thisfile_bmp_header_raw['width']; $col++) {
$thisfile_bmp['data'][$row][$col] = (ord($BMPpixelData[$pixeldataoffset+3]) << 24) | (ord($BMPpixelData[$pixeldataoffset+2]) << 16) | (ord($BMPpixelData[$pixeldataoffset+1]) << 8) | ord($BMPpixelData[$pixeldataoffset]);
$pixeldataoffset += 4;
}
while (($pixeldataoffset % 4) != 0) {
// lines are padded to nearest DWORD
$pixeldataoffset++;
}
}
break;
case 16:
// ?
break;
default:
$ThisFileInfo['error'][] = 'Unknown bits-per-pixel value ('.$thisfile_bmp_header_raw['bits_per_pixel'].') - cannot read pixel data';
break;
}
break;
case 1: // BI_RLE8 - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_6x0u.asp
switch ($thisfile_bmp_header_raw['bits_per_pixel']) {
case 8:
$pixelcounter = 0;
while ($pixeldataoffset < strlen($BMPpixelData)) {
$firstbyte = $this->LittleEndian2Int($BMPpixelData[ $pixeldataoffset++ ]);
$secondbyte = $this->LittleEndian2Int($BMPpixelData[ $pixeldataoffset++ ]);
if ($firstbyte == 0) {
// escaped/absolute mode - the first byte of the pair can be set to zero to
// indicate an escape character that denotes the end of a line, the end of
// a bitmap, or a delta, depending on the value of the second byte.
switch ($secondbyte) {
case 0:
// end of line
// no need for special processing, just ignore
break;
case 1:
// end of bitmap
$pixeldataoffset = strlen($BMPpixelData); // force to exit loop just in case
break;
case 2:
// delta - The 2 bytes following the escape contain unsigned values
// indicating the horizontal and vertical offsets of the next pixel
// from the current position.
$colincrement = $this->LittleEndian2Int($BMPpixelData[ $pixeldataoffset++ ]);
$rowincrement = $this->LittleEndian2Int($BMPpixelData[ $pixeldataoffset++ ]);
$col = ($pixelcounter % $thisfile_bmp_header_raw['width']) + $colincrement;
$row = ($thisfile_bmp_header_raw['height'] - 1 - (($pixelcounter - $col) / $thisfile_bmp_header_raw['width'])) - $rowincrement;
$pixelcounter = ($row * $thisfile_bmp_header_raw['width']) + $col;
break;
default:
// In absolute mode, the first byte is zero and the second byte is a
// value in the range 03H through FFH. The second byte represents the
// number of bytes that follow, each of which contains the color index
// of a single pixel. Each run must be aligned on a word boundary.
for ($i = 0; $i < $secondbyte; $i++) {
$paletteindex = $this->LittleEndian2Int($BMPpixelData[ $pixeldataoffset++ ]);
$col = $pixelcounter % $thisfile_bmp_header_raw['width'];
$row = $thisfile_bmp_header_raw['height'] - 1 - (($pixelcounter - $col) / $thisfile_bmp_header_raw['width']);
$thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindex];
$pixelcounter++;
}
while (($pixeldataoffset % 2) != 0) {
// Each run must be aligned on a word boundary.
$pixeldataoffset++;
}
break;
}
} else {
// encoded mode - the first byte specifies the number of consecutive pixels
// to be drawn using the color index contained in the second byte.
for ($i = 0; $i < $firstbyte; $i++) {
$col = $pixelcounter % $thisfile_bmp_header_raw['width'];
$row = $thisfile_bmp_header_raw['height'] - 1 - (($pixelcounter - $col) / $thisfile_bmp_header_raw['width']);
$thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$secondbyte];
$pixelcounter++;
}
}
}
break;
default:
$ThisFileInfo['error'][] = 'Unknown bits-per-pixel value ('.$thisfile_bmp_header_raw['bits_per_pixel'].') - cannot read pixel data';
break;
}
break;
case 2: // BI_RLE4 - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_6x0u.asp
switch ($thisfile_bmp_header_raw['bits_per_pixel']) {
case 4:
$pixelcounter = 0;
while ($pixeldataoffset < strlen($BMPpixelData)) {
$firstbyte = $this->LittleEndian2Int($BMPpixelData[ $pixeldataoffset++ ]);
$secondbyte = $this->LittleEndian2Int($BMPpixelData[ $pixeldataoffset++ ]);
if ($firstbyte == 0) {
// escaped/absolute mode - the first byte of the pair can be set to zero to
// indicate an escape character that denotes the end of a line, the end of
// a bitmap, or a delta, depending on the value of the second byte.
switch ($secondbyte) {
case 0:
// end of line
// no need for special processing, just ignore
break;
case 1:
// end of bitmap
$pixeldataoffset = strlen($BMPpixelData); // force to exit loop just in case
break;
case 2:
// delta - The 2 bytes following the escape contain unsigned values
// indicating the horizontal and vertical offsets of the next pixel
// from the current position.
$colincrement = $this->LittleEndian2Int($BMPpixelData[ $pixeldataoffset++ ]);
$rowincrement = $this->LittleEndian2Int($BMPpixelData[ $pixeldataoffset++ ]);
$col = ($pixelcounter % $thisfile_bmp_header_raw['width']) + $colincrement;
$row = ($thisfile_bmp_header_raw['height'] - 1 - (($pixelcounter - $col) / $thisfile_bmp_header_raw['width'])) - $rowincrement;
$pixelcounter = ($row * $thisfile_bmp_header_raw['width']) + $col;
break;
default:
// In absolute mode, the first byte is zero. The second byte contains the number
// of color indexes that follow. Subsequent bytes contain color indexes in their
// high- and low-order 4 bits, one color index for each pixel. In absolute mode,
// each run must be aligned on a word boundary.
$paletteindexes = array();
for ($i = 0, $iMax = ceil($secondbyte / 2); $i < $iMax; $i++) {
$paletteindexbyte = $this->LittleEndian2Int($BMPpixelData[ $pixeldataoffset++ ]);
$paletteindexes[] = ($paletteindexbyte & 0xF0) >> 4;
$paletteindexes[] = ($paletteindexbyte & 0x0F);
}
while (($pixeldataoffset % 2) != 0) {
// Each run must be aligned on a word boundary.
$pixeldataoffset++;
}
foreach ($paletteindexes as $dummy => $paletteindex) {
$col = $pixelcounter % $thisfile_bmp_header_raw['width'];
$row = $thisfile_bmp_header_raw['height'] - 1 - (($pixelcounter - $col) / $thisfile_bmp_header_raw['width']);
$thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindex];
$pixelcounter++;
}
break;
}
} else {
// encoded mode - the first byte of the pair contains the number of pixels to be
// drawn using the color indexes in the second byte. The second byte contains two
// color indexes, one in its high-order 4 bits and one in its low-order 4 bits.
// The first of the pixels is drawn using the color specified by the high-order
// 4 bits, the second is drawn using the color in the low-order 4 bits, the third
// is drawn using the color in the high-order 4 bits, and so on, until all the
// pixels specified by the first byte have been drawn.
$paletteindexes[0] = ($secondbyte & 0xF0) >> 4;
$paletteindexes[1] = ($secondbyte & 0x0F);
for ($i = 0; $i < $firstbyte; $i++) {
$col = $pixelcounter % $thisfile_bmp_header_raw['width'];
$row = $thisfile_bmp_header_raw['height'] - 1 - (($pixelcounter - $col) / $thisfile_bmp_header_raw['width']);
$thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][ $paletteindexes[ $i % 2 ]];
$pixelcounter++;
}
}
}
break;
default:
$ThisFileInfo['error'][] = 'Unknown bits-per-pixel value ('.$thisfile_bmp_header_raw['bits_per_pixel'].') - cannot read pixel data';
break;
}
break;
case 3: // BI_BITFIELDS
switch ($thisfile_bmp_header_raw['bits_per_pixel']) {
case 16:
case 32:
$redshift = 0;
$greenshift = 0;
$blueshift = 0;
if (!$thisfile_bmp_header_raw['red_mask'] || !$thisfile_bmp_header_raw['green_mask'] || !$thisfile_bmp_header_raw['blue_mask']) {
$ThisFileInfo['error'][] = 'missing $thisfile_bmp_header_raw[(red|green|blue)_mask]';
return false;
}
while ((($thisfile_bmp_header_raw['red_mask'] >> $redshift) & 0x01) == 0) {
$redshift++;
}
while ((($thisfile_bmp_header_raw['green_mask'] >> $greenshift) & 0x01) == 0) {
$greenshift++;
}
while ((($thisfile_bmp_header_raw['blue_mask'] >> $blueshift) & 0x01) == 0) {
$blueshift++;
}
for ($row = ($thisfile_bmp_header_raw['height'] - 1); $row >= 0; $row--) {
for ($col = 0; $col < $thisfile_bmp_header_raw['width']; $col++) {
$pixelvalue = $this->LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset, $thisfile_bmp_header_raw['bits_per_pixel'] / 8));
$pixeldataoffset += $thisfile_bmp_header_raw['bits_per_pixel'] / 8;
$red = (int) round(((($pixelvalue & $thisfile_bmp_header_raw[ 'red_mask']) >> $redshift) / ($thisfile_bmp_header_raw[ 'red_mask'] >> $redshift)) * 255);
$green = (int) round(((($pixelvalue & $thisfile_bmp_header_raw[ 'green_mask']) >> $greenshift) / ($thisfile_bmp_header_raw[ 'green_mask'] >> $greenshift)) * 255);
$blue = (int) round(((($pixelvalue & $thisfile_bmp_header_raw[ 'blue_mask']) >> $blueshift) / ($thisfile_bmp_header_raw[ 'blue_mask'] >> $blueshift)) * 255);
$thisfile_bmp['data'][$row][$col] = (($red << 16) | ($green << 8) | $blue);
}
while (($pixeldataoffset % 4) != 0) {
// lines are padded to nearest DWORD
$pixeldataoffset++;
}
}
break;
default:
$ThisFileInfo['error'][] = 'Unknown bits-per-pixel value ('.$thisfile_bmp_header_raw['bits_per_pixel'].') - cannot read pixel data';
break;
}
break;
default: // unhandled compression type
$ThisFileInfo['error'][] = 'Unknown/unhandled compression type value ('.$thisfile_bmp_header_raw['compression'].') - cannot decompress pixel data';
break;
}
}
return true;
}
public function IntColor2RGB($color) {
$red = ($color & 0x00FF0000) >> 16;
$green = ($color & 0x0000FF00) >> 8;
$blue = ($color & 0x000000FF);
return array($red, $green, $blue);
}
public function PlotPixelsGD(&$BMPdata, $truecolor=true) {
$imagewidth = $BMPdata['header']['raw']['width'];
$imageheight = $BMPdata['header']['raw']['height'];
if ($truecolor) {
$gd = @imagecreatetruecolor($imagewidth, $imageheight);
} else {
$gd = @imagecreate($imagewidth, $imageheight);
if (!empty($BMPdata['palette'])) {
// create GD palette from BMP palette
foreach ($BMPdata['palette'] as $dummy => $color) {
list($r, $g, $b) = $this->IntColor2RGB($color);
imagecolorallocate($gd, $r, $g, $b);
}
} else {
// create 216-color websafe palette
for ($r = 0x00; $r <= 0xFF; $r += 0x33) {
for ($g = 0x00; $g <= 0xFF; $g += 0x33) {
for ($b = 0x00; $b <= 0xFF; $b += 0x33) {
imagecolorallocate($gd, $r, $g, $b);
}
}
}
}
}
if (!is_resource($gd) && !(is_object($gd) && $gd instanceOf \GdImage)) {
return false;
}
foreach ($BMPdata['data'] as $row => $colarray) {
if (!phpthumb_functions::FunctionIsDisabled('set_time_limit')) {
set_time_limit(30);
}
foreach ($colarray as $col => $color) {
list($red, $green, $blue) = $this->IntColor2RGB($color);
if ($truecolor) {
$pixelcolor = imagecolorallocate($gd, $red, $green, $blue);
} else {
$pixelcolor = imagecolorclosest($gd, $red, $green, $blue);
}
imagesetpixel($gd, $col, $row, $pixelcolor);
}
}
return $gd;
}
public function PlotBMP(&$BMPinfo) {
$starttime = time();
if (!isset($BMPinfo['bmp']['data']) || !is_array($BMPinfo['bmp']['data'])) {
echo 'ERROR: no pixel data<BR>';
return false;
}
if (!phpthumb_functions::FunctionIsDisabled('set_time_limit')) {
set_time_limit((int) round($BMPinfo[ 'resolution_x'] * $BMPinfo[ 'resolution_y'] / 10000));
}
$im = $this->PlotPixelsGD($BMPinfo['bmp']);
if (headers_sent()) {
echo 'plotted '.($BMPinfo['resolution_x'] * $BMPinfo['resolution_y']).' pixels in '.(time() - $starttime).' seconds<BR>';
imagedestroy($im);
exit;
}
header('Content-Type: image/png');
imagepng($im);
imagedestroy($im);
return true;
}
public function BMPcompressionWindowsLookup($compressionid) {
static $BMPcompressionWindowsLookup = array(
0 => 'BI_RGB',
1 => 'BI_RLE8',
2 => 'BI_RLE4',
3 => 'BI_BITFIELDS',
4 => 'BI_JPEG',
5 => 'BI_PNG'
);
return (isset($BMPcompressionWindowsLookup[$compressionid]) ? $BMPcompressionWindowsLookup[$compressionid] : 'invalid');
}
public function BMPcompressionOS2Lookup($compressionid) {
static $BMPcompressionOS2Lookup = array(
0 => 'BI_RGB',
1 => 'BI_RLE8',
2 => 'BI_RLE4',
3 => 'Huffman 1D',
4 => 'BI_RLE24',
);
return (isset($BMPcompressionOS2Lookup[$compressionid]) ? $BMPcompressionOS2Lookup[$compressionid] : 'invalid');
}
// from getid3.lib.php
public function trunc($floatnumber) {
// truncates a floating-point number at the decimal point
// returns int (if possible, otherwise float)
if ($floatnumber >= 1) {
$truncatednumber = floor($floatnumber);
} elseif ($floatnumber <= -1) {
$truncatednumber = ceil($floatnumber);
} else {
$truncatednumber = 0;
}
if ($truncatednumber <= 1073741824) { // 2^30
$truncatednumber = (int) $truncatednumber;
}
return $truncatednumber;
}
public function LittleEndian2Int($byteword) {
$intvalue = 0;
$byteword = strrev($byteword);
$bytewordlen = strlen($byteword);
for ($i = 0; $i < $bytewordlen; $i++) {
$intvalue += ord($byteword[$i]) * pow(256, $bytewordlen - 1 - $i);
}
return $intvalue;
}
public function BigEndian2Int($byteword) {
return $this->LittleEndian2Int(strrev($byteword));
}
public function BigEndian2Bin($byteword) {
$binvalue = '';
$bytewordlen = strlen($byteword);
for ($i = 0; $i < $bytewordlen; $i++) {
$binvalue .= str_pad(decbin(ord($byteword[$i])), 8, '0', STR_PAD_LEFT);
}
return $binvalue;
}
public function FixedPoint2_30($rawdata) {
$binarystring = $this->BigEndian2Bin($rawdata);
return $this->Bin2Dec(substr($binarystring, 0, 2)) + (float) ($this->Bin2Dec(substr($binarystring, 2, 30)) / 1073741824);
}
public function Bin2Dec($binstring, $signed=false) {
$signmult = 1;
if ($signed) {
if ($binstring[0] == '1') {
$signmult = -1;
}
$binstring = substr($binstring, 1);
}
$decvalue = 0;
for ($i = 0, $iMax = strlen($binstring); $i < $iMax; $i++) {
$decvalue += ((int) $binstring[ strlen($binstring) - $i - 1 ]) * pow(2, $i);
}
return $this->CastAsInt($decvalue * $signmult);
}
public function CastAsInt($floatnum) {
// convert to float if not already
$floatnum = (float) $floatnum;
// convert a float to type int, only if possible
if ($this->trunc($floatnum) == $floatnum) {
// it's not floating point
if ($floatnum <= 1073741824) { // 2^30
// it's within int range
$floatnum = (int) $floatnum;
}
}
return $floatnum;
}
}