source: trunk/www.guidonia.net/wp/wp-content/plugins/ferdinand-wordbook/phpthumb/phpthumb.bmp.php@ 44

Last change on this file since 44 was 44, checked in by luciano, 15 years ago
File size: 36.6 KB
Line 
1<?php
2/////////////////////////////////////////////////////////////////
3/// getID3() by James Heinrich <info@getid3.org> //
4// available at http://getid3.sourceforge.net //
5// or http://www.getid3.org //
6/////////////////////////////////////////////////////////////////
7// See readme.txt for more details //
8/////////////////////////////////////////////////////////////////
9// //
10// module.graphic.bmp.php //
11// module for analyzing BMP Image files //
12// dependencies: NONE //
13// ///
14/////////////////////////////////////////////////////////////////
15// //
16// Modified for use in phpThumb() - James Heinrich 2004.07.27 //
17// //
18/////////////////////////////////////////////////////////////////
19
20
21class phpthumb_bmp {
22
23 function phpthumb_bmp() {
24 return true;
25 }
26
27 function phpthumb_bmp2gd(&$BMPdata, $truecolor=true) {
28 $ThisFileInfo = array();
29 if ($this->getid3_bmp($BMPdata, $ThisFileInfo, true, true)) {
30 $gd = $this->PlotPixelsGD($ThisFileInfo['bmp'], $truecolor);
31 return $gd;
32 }
33 return false;
34 }
35
36 function phpthumb_bmpfile2gd($filename, $truecolor=true) {
37 if ($fp = @fopen($filename, 'rb')) {
38 $BMPdata = fread($fp, filesize($filename));
39 fclose($fp);
40 return $this->phpthumb_bmp2gd($BMPdata, $truecolor);
41 }
42 return false;
43 }
44
45 function GD2BMPstring(&$gd_image) {
46 $imageX = ImageSX($gd_image);
47 $imageY = ImageSY($gd_image);
48
49 $BMP = '';
50 for ($y = ($imageY - 1); $y >= 0; $y--) {
51 $thisline = '';
52 for ($x = 0; $x < $imageX; $x++) {
53 $argb = phpthumb_functions::GetPixelColor($gd_image, $x, $y);
54 $thisline .= chr($argb['blue']).chr($argb['green']).chr($argb['red']);
55 }
56 while (strlen($thisline) % 4) {
57 $thisline .= "\x00";
58 }
59 $BMP .= $thisline;
60 }
61
62 $bmpSize = strlen($BMP) + 14 + 40;
63 // BITMAPFILEHEADER [14 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_62uq.asp
64 $BITMAPFILEHEADER = 'BM'; // WORD bfType;
65 $BITMAPFILEHEADER .= phpthumb_functions::LittleEndian2String($bmpSize, 4); // DWORD bfSize;
66 $BITMAPFILEHEADER .= phpthumb_functions::LittleEndian2String( 0, 2); // WORD bfReserved1;
67 $BITMAPFILEHEADER .= phpthumb_functions::LittleEndian2String( 0, 2); // WORD bfReserved2;
68 $BITMAPFILEHEADER .= phpthumb_functions::LittleEndian2String( 54, 4); // DWORD bfOffBits;
69
70 // BITMAPINFOHEADER - [40 bytes] http://msdn.microsoft.com/library/en-us/gdi/bitmaps_1rw2.asp
71 $BITMAPINFOHEADER = phpthumb_functions::LittleEndian2String( 40, 4); // DWORD biSize;
72 $BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( $imageX, 4); // LONG biWidth;
73 $BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( $imageY, 4); // LONG biHeight;
74 $BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 1, 2); // WORD biPlanes;
75 $BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 24, 2); // WORD biBitCount;
76 $BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 0, 4); // DWORD biCompression;
77 $BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 0, 4); // DWORD biSizeImage;
78 $BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 2835, 4); // LONG biXPelsPerMeter;
79 $BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 2835, 4); // LONG biYPelsPerMeter;
80 $BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 0, 4); // DWORD biClrUsed;
81 $BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 0, 4); // DWORD biClrImportant;
82
83 return $BITMAPFILEHEADER.$BITMAPINFOHEADER.$BMP;
84 }
85
86 function getid3_bmp(&$BMPdata, &$ThisFileInfo, $ExtractPalette=false, $ExtractData=false) {
87
88 // shortcuts
89 $ThisFileInfo['bmp']['header']['raw'] = array();
90 $thisfile_bmp = &$ThisFileInfo['bmp'];
91 $thisfile_bmp_header = &$thisfile_bmp['header'];
92 $thisfile_bmp_header_raw = &$thisfile_bmp_header['raw'];
93
94 // BITMAPFILEHEADER [14 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_62uq.asp
95 // all versions
96 // WORD bfType;
97 // DWORD bfSize;
98 // WORD bfReserved1;
99 // WORD bfReserved2;
100 // DWORD bfOffBits;
101
102 $offset = 0;
103 $overalloffset = 0;
104 $BMPheader = substr($BMPdata, $overalloffset, 14 + 40);
105 $overalloffset += (14 + 40);
106
107 $thisfile_bmp_header_raw['identifier'] = substr($BMPheader, $offset, 2);
108 $offset += 2;
109
110 if ($thisfile_bmp_header_raw['identifier'] != 'BM') {
111 $ThisFileInfo['error'][] = 'Expecting "BM" at offset '.intval(@$ThisFileInfo['avdataoffset']).', found "'.$thisfile_bmp_header_raw['identifier'].'"';
112 unset($ThisFileInfo['fileformat']);
113 unset($ThisFileInfo['bmp']);
114 return false;
115 }
116
117 $thisfile_bmp_header_raw['filesize'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
118 $offset += 4;
119 $thisfile_bmp_header_raw['reserved1'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
120 $offset += 2;
121 $thisfile_bmp_header_raw['reserved2'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
122 $offset += 2;
123 $thisfile_bmp_header_raw['data_offset'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
124 $offset += 4;
125 $thisfile_bmp_header_raw['header_size'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
126 $offset += 4;
127
128
129 // check if the hardcoded-to-1 "planes" is at offset 22 or 26
130 $planes22 = $this->LittleEndian2Int(substr($BMPheader, 22, 2));
131 $planes26 = $this->LittleEndian2Int(substr($BMPheader, 26, 2));
132 if (($planes22 == 1) && ($planes26 != 1)) {
133 $thisfile_bmp['type_os'] = 'OS/2';
134 $thisfile_bmp['type_version'] = 1;
135 } elseif (($planes26 == 1) && ($planes22 != 1)) {
136 $thisfile_bmp['type_os'] = 'Windows';
137 $thisfile_bmp['type_version'] = 1;
138 } elseif ($thisfile_bmp_header_raw['header_size'] == 12) {
139 $thisfile_bmp['type_os'] = 'OS/2';
140 $thisfile_bmp['type_version'] = 1;
141 } elseif ($thisfile_bmp_header_raw['header_size'] == 40) {
142 $thisfile_bmp['type_os'] = 'Windows';
143 $thisfile_bmp['type_version'] = 1;
144 } elseif ($thisfile_bmp_header_raw['header_size'] == 84) {
145 $thisfile_bmp['type_os'] = 'Windows';
146 $thisfile_bmp['type_version'] = 4;
147 } elseif ($thisfile_bmp_header_raw['header_size'] == 100) {
148 $thisfile_bmp['type_os'] = 'Windows';
149 $thisfile_bmp['type_version'] = 5;
150 } else {
151 $ThisFileInfo['error'][] = 'Unknown BMP subtype (or not a BMP file)';
152 unset($ThisFileInfo['fileformat']);
153 unset($ThisFileInfo['bmp']);
154 return false;
155 }
156
157 $ThisFileInfo['fileformat'] = 'bmp';
158 $ThisFileInfo['video']['dataformat'] = 'bmp';
159 $ThisFileInfo['video']['lossless'] = true;
160 $ThisFileInfo['video']['pixel_aspect_ratio'] = (float) 1;
161
162 if ($thisfile_bmp['type_os'] == 'OS/2') {
163
164 // OS/2-format BMP
165 // http://netghost.narod.ru/gff/graphics/summary/os2bmp.htm
166
167 // DWORD Size; /* Size of this structure in bytes */
168 // DWORD Width; /* Bitmap width in pixels */
169 // DWORD Height; /* Bitmap height in pixel */
170 // WORD NumPlanes; /* Number of bit planes (color depth) */
171 // WORD BitsPerPixel; /* Number of bits per pixel per plane */
172
173 $thisfile_bmp_header_raw['width'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
174 $offset += 2;
175 $thisfile_bmp_header_raw['height'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
176 $offset += 2;
177 $thisfile_bmp_header_raw['planes'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
178 $offset += 2;
179 $thisfile_bmp_header_raw['bits_per_pixel'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
180 $offset += 2;
181
182 $ThisFileInfo['video']['resolution_x'] = $thisfile_bmp_header_raw['width'];
183 $ThisFileInfo['video']['resolution_y'] = $thisfile_bmp_header_raw['height'];
184 $ThisFileInfo['video']['codec'] = 'BI_RGB '.$thisfile_bmp_header_raw['bits_per_pixel'].'-bit';
185 $ThisFileInfo['video']['bits_per_sample'] = $thisfile_bmp_header_raw['bits_per_pixel'];
186
187 if ($thisfile_bmp['type_version'] >= 2) {
188 // DWORD Compression; /* Bitmap compression scheme */
189 // DWORD ImageDataSize; /* Size of bitmap data in bytes */
190 // DWORD XResolution; /* X resolution of display device */
191 // DWORD YResolution; /* Y resolution of display device */
192 // DWORD ColorsUsed; /* Number of color table indices used */
193 // DWORD ColorsImportant; /* Number of important color indices */
194 // WORD Units; /* Type of units used to measure resolution */
195 // WORD Reserved; /* Pad structure to 4-byte boundary */
196 // WORD Recording; /* Recording algorithm */
197 // WORD Rendering; /* Halftoning algorithm used */
198 // DWORD Size1; /* Reserved for halftoning algorithm use */
199 // DWORD Size2; /* Reserved for halftoning algorithm use */
200 // DWORD ColorEncoding; /* Color model used in bitmap */
201 // DWORD Identifier; /* Reserved for application use */
202
203 $thisfile_bmp_header_raw['compression'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
204 $offset += 4;
205 $thisfile_bmp_header_raw['bmp_data_size'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
206 $offset += 4;
207 $thisfile_bmp_header_raw['resolution_h'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
208 $offset += 4;
209 $thisfile_bmp_header_raw['resolution_v'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
210 $offset += 4;
211 $thisfile_bmp_header_raw['colors_used'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
212 $offset += 4;
213 $thisfile_bmp_header_raw['colors_important'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
214 $offset += 4;
215 $thisfile_bmp_header_raw['resolution_units'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
216 $offset += 2;
217 $thisfile_bmp_header_raw['reserved1'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
218 $offset += 2;
219 $thisfile_bmp_header_raw['recording'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
220 $offset += 2;
221 $thisfile_bmp_header_raw['rendering'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
222 $offset += 2;
223 $thisfile_bmp_header_raw['size1'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
224 $offset += 4;
225 $thisfile_bmp_header_raw['size2'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
226 $offset += 4;
227 $thisfile_bmp_header_raw['color_encoding'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
228 $offset += 4;
229 $thisfile_bmp_header_raw['identifier'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
230 $offset += 4;
231
232 $thisfile_bmp_header['compression'] = $this->BMPcompressionOS2Lookup($thisfile_bmp_header_raw['compression']);
233
234 $ThisFileInfo['video']['codec'] = $thisfile_bmp_header['compression'].' '.$thisfile_bmp_header_raw['bits_per_pixel'].'-bit';
235 }
236
237 } elseif ($thisfile_bmp['type_os'] == 'Windows') {
238
239 // Windows-format BMP
240
241 // BITMAPINFOHEADER - [40 bytes] http://msdn.microsoft.com/library/en-us/gdi/bitmaps_1rw2.asp
242 // all versions
243 // DWORD biSize;
244 // LONG biWidth;
245 // LONG biHeight;
246 // WORD biPlanes;
247 // WORD biBitCount;
248 // DWORD biCompression;
249 // DWORD biSizeImage;
250 // LONG biXPelsPerMeter;
251 // LONG biYPelsPerMeter;
252 // DWORD biClrUsed;
253 // DWORD biClrImportant;
254
255 $thisfile_bmp_header_raw['width'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4), true);
256 $offset += 4;
257 $thisfile_bmp_header_raw['height'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4), true);
258 $offset += 4;
259 $thisfile_bmp_header_raw['planes'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
260 $offset += 2;
261 $thisfile_bmp_header_raw['bits_per_pixel'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
262 $offset += 2;
263 $thisfile_bmp_header_raw['compression'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
264 $offset += 4;
265 $thisfile_bmp_header_raw['bmp_data_size'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
266 $offset += 4;
267 $thisfile_bmp_header_raw['resolution_h'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4), true);
268 $offset += 4;
269 $thisfile_bmp_header_raw['resolution_v'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4), true);
270 $offset += 4;
271 $thisfile_bmp_header_raw['colors_used'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
272 $offset += 4;
273 $thisfile_bmp_header_raw['colors_important'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
274 $offset += 4;
275
276 $thisfile_bmp_header['compression'] = $this->BMPcompressionWindowsLookup($thisfile_bmp_header_raw['compression']);
277 $ThisFileInfo['video']['resolution_x'] = $thisfile_bmp_header_raw['width'];
278 $ThisFileInfo['video']['resolution_y'] = $thisfile_bmp_header_raw['height'];
279 $ThisFileInfo['video']['codec'] = $thisfile_bmp_header['compression'].' '.$thisfile_bmp_header_raw['bits_per_pixel'].'-bit';
280 $ThisFileInfo['video']['bits_per_sample'] = $thisfile_bmp_header_raw['bits_per_pixel'];
281
282 if (($thisfile_bmp['type_version'] >= 4) || ($thisfile_bmp_header_raw['compression'] == 3)) {
283 // should only be v4+, but BMPs with type_version==1 and BI_BITFIELDS compression have been seen
284 $BMPheader .= substr($BMPdata, $overalloffset, 44);
285 $overalloffset += 44;
286
287 // BITMAPV4HEADER - [44 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_2k1e.asp
288 // Win95+, WinNT4.0+
289 // DWORD bV4RedMask;
290 // DWORD bV4GreenMask;
291 // DWORD bV4BlueMask;
292 // DWORD bV4AlphaMask;
293 // DWORD bV4CSType;
294 // CIEXYZTRIPLE bV4Endpoints;
295 // DWORD bV4GammaRed;
296 // DWORD bV4GammaGreen;
297 // DWORD bV4GammaBlue;
298 $thisfile_bmp_header_raw['red_mask'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
299 $offset += 4;
300 $thisfile_bmp_header_raw['green_mask'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
301 $offset += 4;
302 $thisfile_bmp_header_raw['blue_mask'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
303 $offset += 4;
304 $thisfile_bmp_header_raw['alpha_mask'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
305 $offset += 4;
306 $thisfile_bmp_header_raw['cs_type'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
307 $offset += 4;
308 $thisfile_bmp_header_raw['ciexyz_red'] = substr($BMPheader, $offset, 4);
309 $offset += 4;
310 $thisfile_bmp_header_raw['ciexyz_green'] = substr($BMPheader, $offset, 4);
311 $offset += 4;
312 $thisfile_bmp_header_raw['ciexyz_blue'] = substr($BMPheader, $offset, 4);
313 $offset += 4;
314 $thisfile_bmp_header_raw['gamma_red'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
315 $offset += 4;
316 $thisfile_bmp_header_raw['gamma_green'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
317 $offset += 4;
318 $thisfile_bmp_header_raw['gamma_blue'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
319 $offset += 4;
320
321 $thisfile_bmp_header['ciexyz_red'] = $this->FixedPoint2_30(strrev($thisfile_bmp_header_raw['ciexyz_red']));
322 $thisfile_bmp_header['ciexyz_green'] = $this->FixedPoint2_30(strrev($thisfile_bmp_header_raw['ciexyz_green']));
323 $thisfile_bmp_header['ciexyz_blue'] = $this->FixedPoint2_30(strrev($thisfile_bmp_header_raw['ciexyz_blue']));
324 }
325
326 if ($thisfile_bmp['type_version'] >= 5) {
327 $BMPheader .= substr($BMPdata, $overalloffset, 16);
328 $overalloffset += 16;
329
330 // BITMAPV5HEADER - [16 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_7c36.asp
331 // Win98+, Win2000+
332 // DWORD bV5Intent;
333 // DWORD bV5ProfileData;
334 // DWORD bV5ProfileSize;
335 // DWORD bV5Reserved;
336 $thisfile_bmp_header_raw['intent'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
337 $offset += 4;
338 $thisfile_bmp_header_raw['profile_data_offset'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
339 $offset += 4;
340 $thisfile_bmp_header_raw['profile_data_size'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
341 $offset += 4;
342 $thisfile_bmp_header_raw['reserved3'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
343 $offset += 4;
344 }
345
346 } else {
347
348 $ThisFileInfo['error'][] = 'Unknown BMP format in header.';
349 return false;
350
351 }
352
353 if ($ExtractPalette || $ExtractData) {
354 $PaletteEntries = 0;
355 if ($thisfile_bmp_header_raw['bits_per_pixel'] < 16) {
356 $PaletteEntries = pow(2, $thisfile_bmp_header_raw['bits_per_pixel']);
357 } elseif (isset($thisfile_bmp_header_raw['colors_used']) && ($thisfile_bmp_header_raw['colors_used'] > 0) && ($thisfile_bmp_header_raw['colors_used'] <= 256)) {
358 $PaletteEntries = $thisfile_bmp_header_raw['colors_used'];
359 }
360 if ($PaletteEntries > 0) {
361 $BMPpalette = substr($BMPdata, $overalloffset, 4 * $PaletteEntries);
362 $overalloffset += 4 * $PaletteEntries;
363
364 $paletteoffset = 0;
365 for ($i = 0; $i < $PaletteEntries; $i++) {
366 // RGBQUAD - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_5f8y.asp
367 // BYTE rgbBlue;
368 // BYTE rgbGreen;
369 // BYTE rgbRed;
370 // BYTE rgbReserved;
371 $blue = $this->LittleEndian2Int(substr($BMPpalette, $paletteoffset++, 1));
372 $green = $this->LittleEndian2Int(substr($BMPpalette, $paletteoffset++, 1));
373 $red = $this->LittleEndian2Int(substr($BMPpalette, $paletteoffset++, 1));
374 if (($thisfile_bmp['type_os'] == 'OS/2') && ($thisfile_bmp['type_version'] == 1)) {
375 // no padding byte
376 } else {
377 $paletteoffset++; // padding byte
378 }
379 $thisfile_bmp['palette'][$i] = (($red << 16) | ($green << 8) | ($blue));
380 }
381 }
382 }
383
384 if ($ExtractData) {
385 $RowByteLength = ceil(($thisfile_bmp_header_raw['width'] * ($thisfile_bmp_header_raw['bits_per_pixel'] / 8)) / 4) * 4; // round up to nearest DWORD boundry
386
387 $BMPpixelData = substr($BMPdata, $thisfile_bmp_header_raw['data_offset'], $thisfile_bmp_header_raw['height'] * $RowByteLength);
388 $overalloffset = $thisfile_bmp_header_raw['data_offset'] + ($thisfile_bmp_header_raw['height'] * $RowByteLength);
389
390 $pixeldataoffset = 0;
391 switch (@$thisfile_bmp_header_raw['compression']) {
392
393 case 0: // BI_RGB
394 switch ($thisfile_bmp_header_raw['bits_per_pixel']) {
395 case 1:
396 for ($row = ($thisfile_bmp_header_raw['height'] - 1); $row >= 0; $row--) {
397 for ($col = 0; $col < $thisfile_bmp_header_raw['width']; $col = $col) {
398 $paletteindexbyte = ord($BMPpixelData{$pixeldataoffset++});
399 for ($i = 7; $i >= 0; $i--) {
400 $paletteindex = ($paletteindexbyte & (0x01 << $i)) >> $i;
401 $thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindex];
402 $col++;
403 }
404 }
405 while (($pixeldataoffset % 4) != 0) {
406 // lines are padded to nearest DWORD
407 $pixeldataoffset++;
408 }
409 }
410 break;
411
412 case 4:
413 for ($row = ($thisfile_bmp_header_raw['height'] - 1); $row >= 0; $row--) {
414 for ($col = 0; $col < $thisfile_bmp_header_raw['width']; $col = $col) {
415 $paletteindexbyte = ord($BMPpixelData{$pixeldataoffset++});
416 for ($i = 1; $i >= 0; $i--) {
417 $paletteindex = ($paletteindexbyte & (0x0F << (4 * $i))) >> (4 * $i);
418 $thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindex];
419 $col++;
420 }
421 }
422 while (($pixeldataoffset % 4) != 0) {
423 // lines are padded to nearest DWORD
424 $pixeldataoffset++;
425 }
426 }
427 break;
428
429 case 8:
430 for ($row = ($thisfile_bmp_header_raw['height'] - 1); $row >= 0; $row--) {
431 for ($col = 0; $col < $thisfile_bmp_header_raw['width']; $col++) {
432 $paletteindex = ord($BMPpixelData{$pixeldataoffset++});
433 $thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindex];
434 }
435 while (($pixeldataoffset % 4) != 0) {
436 // lines are padded to nearest DWORD
437 $pixeldataoffset++;
438 }
439 }
440 break;
441
442 case 24:
443 for ($row = ($thisfile_bmp_header_raw['height'] - 1); $row >= 0; $row--) {
444 for ($col = 0; $col < $thisfile_bmp_header_raw['width']; $col++) {
445 $thisfile_bmp['data'][$row][$col] = (ord($BMPpixelData{$pixeldataoffset+2}) << 16) | (ord($BMPpixelData{$pixeldataoffset+1}) << 8) | ord($BMPpixelData{$pixeldataoffset});
446 $pixeldataoffset += 3;
447 }
448 while (($pixeldataoffset % 4) != 0) {
449 // lines are padded to nearest DWORD
450 $pixeldataoffset++;
451 }
452 }
453 break;
454
455 case 32:
456 for ($row = ($thisfile_bmp_header_raw['height'] - 1); $row >= 0; $row--) {
457 for ($col = 0; $col < $thisfile_bmp_header_raw['width']; $col++) {
458 $thisfile_bmp['data'][$row][$col] = (ord($BMPpixelData{$pixeldataoffset+3}) << 24) | (ord($BMPpixelData{$pixeldataoffset+2}) << 16) | (ord($BMPpixelData{$pixeldataoffset+1}) << 8) | ord($BMPpixelData{$pixeldataoffset});
459 $pixeldataoffset += 4;
460 }
461 while (($pixeldataoffset % 4) != 0) {
462 // lines are padded to nearest DWORD
463 $pixeldataoffset++;
464 }
465 }
466 break;
467
468 case 16:
469 // ?
470 break;
471
472 default:
473 $ThisFileInfo['error'][] = 'Unknown bits-per-pixel value ('.$thisfile_bmp_header_raw['bits_per_pixel'].') - cannot read pixel data';
474 break;
475 }
476 break;
477
478
479 case 1: // BI_RLE8 - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_6x0u.asp
480 switch ($thisfile_bmp_header_raw['bits_per_pixel']) {
481 case 8:
482 $pixelcounter = 0;
483 while ($pixeldataoffset < strlen($BMPpixelData)) {
484 $firstbyte = $this->LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
485 $secondbyte = $this->LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
486 if ($firstbyte == 0) {
487
488 // escaped/absolute mode - the first byte of the pair can be set to zero to
489 // indicate an escape character that denotes the end of a line, the end of
490 // a bitmap, or a delta, depending on the value of the second byte.
491 switch ($secondbyte) {
492 case 0:
493 // end of line
494 // no need for special processing, just ignore
495 break;
496
497 case 1:
498 // end of bitmap
499 $pixeldataoffset = strlen($BMPpixelData); // force to exit loop just in case
500 break;
501
502 case 2:
503 // delta - The 2 bytes following the escape contain unsigned values
504 // indicating the horizontal and vertical offsets of the next pixel
505 // from the current position.
506 $colincrement = $this->LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
507 $rowincrement = $this->LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
508 $col = ($pixelcounter % $thisfile_bmp_header_raw['width']) + $colincrement;
509 $row = ($thisfile_bmp_header_raw['height'] - 1 - (($pixelcounter - $col) / $thisfile_bmp_header_raw['width'])) - $rowincrement;
510 $pixelcounter = ($row * $thisfile_bmp_header_raw['width']) + $col;
511 break;
512
513 default:
514 // In absolute mode, the first byte is zero and the second byte is a
515 // value in the range 03H through FFH. The second byte represents the
516 // number of bytes that follow, each of which contains the color index
517 // of a single pixel. Each run must be aligned on a word boundary.
518 for ($i = 0; $i < $secondbyte; $i++) {
519 $paletteindex = $this->LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
520 $col = $pixelcounter % $thisfile_bmp_header_raw['width'];
521 $row = $thisfile_bmp_header_raw['height'] - 1 - (($pixelcounter - $col) / $thisfile_bmp_header_raw['width']);
522 $thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindex];
523 $pixelcounter++;
524 }
525 while (($pixeldataoffset % 2) != 0) {
526 // Each run must be aligned on a word boundary.
527 $pixeldataoffset++;
528 }
529 break;
530 }
531
532 } else {
533
534 // encoded mode - the first byte specifies the number of consecutive pixels
535 // to be drawn using the color index contained in the second byte.
536 for ($i = 0; $i < $firstbyte; $i++) {
537 $col = $pixelcounter % $thisfile_bmp_header_raw['width'];
538 $row = $thisfile_bmp_header_raw['height'] - 1 - (($pixelcounter - $col) / $thisfile_bmp_header_raw['width']);
539 $thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$secondbyte];
540 $pixelcounter++;
541 }
542
543 }
544 }
545 break;
546
547 default:
548 $ThisFileInfo['error'][] = 'Unknown bits-per-pixel value ('.$thisfile_bmp_header_raw['bits_per_pixel'].') - cannot read pixel data';
549 break;
550 }
551 break;
552
553
554
555 case 2: // BI_RLE4 - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_6x0u.asp
556 switch ($thisfile_bmp_header_raw['bits_per_pixel']) {
557 case 4:
558 $pixelcounter = 0;
559 while ($pixeldataoffset < strlen($BMPpixelData)) {
560 $firstbyte = $this->LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
561 $secondbyte = $this->LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
562 if ($firstbyte == 0) {
563
564 // escaped/absolute mode - the first byte of the pair can be set to zero to
565 // indicate an escape character that denotes the end of a line, the end of
566 // a bitmap, or a delta, depending on the value of the second byte.
567 switch ($secondbyte) {
568 case 0:
569 // end of line
570 // no need for special processing, just ignore
571 break;
572
573 case 1:
574 // end of bitmap
575 $pixeldataoffset = strlen($BMPpixelData); // force to exit loop just in case
576 break;
577
578 case 2:
579 // delta - The 2 bytes following the escape contain unsigned values
580 // indicating the horizontal and vertical offsets of the next pixel
581 // from the current position.
582 $colincrement = $this->LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
583 $rowincrement = $this->LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
584 $col = ($pixelcounter % $thisfile_bmp_header_raw['width']) + $colincrement;
585 $row = ($thisfile_bmp_header_raw['height'] - 1 - (($pixelcounter - $col) / $thisfile_bmp_header_raw['width'])) - $rowincrement;
586 $pixelcounter = ($row * $thisfile_bmp_header_raw['width']) + $col;
587 break;
588
589 default:
590 // In absolute mode, the first byte is zero. The second byte contains the number
591 // of color indexes that follow. Subsequent bytes contain color indexes in their
592 // high- and low-order 4 bits, one color index for each pixel. In absolute mode,
593 // each run must be aligned on a word boundary.
594 unset($paletteindexes);
595 for ($i = 0; $i < ceil($secondbyte / 2); $i++) {
596 $paletteindexbyte = $this->LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
597 $paletteindexes[] = ($paletteindexbyte & 0xF0) >> 4;
598 $paletteindexes[] = ($paletteindexbyte & 0x0F);
599 }
600 while (($pixeldataoffset % 2) != 0) {
601 // Each run must be aligned on a word boundary.
602 $pixeldataoffset++;
603 }
604
605 foreach ($paletteindexes as $dummy => $paletteindex) {
606 $col = $pixelcounter % $thisfile_bmp_header_raw['width'];
607 $row = $thisfile_bmp_header_raw['height'] - 1 - (($pixelcounter - $col) / $thisfile_bmp_header_raw['width']);
608 $thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindex];
609 $pixelcounter++;
610 }
611 break;
612 }
613
614 } else {
615
616 // encoded mode - the first byte of the pair contains the number of pixels to be
617 // drawn using the color indexes in the second byte. The second byte contains two
618 // color indexes, one in its high-order 4 bits and one in its low-order 4 bits.
619 // The first of the pixels is drawn using the color specified by the high-order
620 // 4 bits, the second is drawn using the color in the low-order 4 bits, the third
621 // is drawn using the color in the high-order 4 bits, and so on, until all the
622 // pixels specified by the first byte have been drawn.
623 $paletteindexes[0] = ($secondbyte & 0xF0) >> 4;
624 $paletteindexes[1] = ($secondbyte & 0x0F);
625 for ($i = 0; $i < $firstbyte; $i++) {
626 $col = $pixelcounter % $thisfile_bmp_header_raw['width'];
627 $row = $thisfile_bmp_header_raw['height'] - 1 - (($pixelcounter - $col) / $thisfile_bmp_header_raw['width']);
628 $thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindexes[($i % 2)]];
629 $pixelcounter++;
630 }
631
632 }
633 }
634 break;
635
636 default:
637 $ThisFileInfo['error'][] = 'Unknown bits-per-pixel value ('.$thisfile_bmp_header_raw['bits_per_pixel'].') - cannot read pixel data';
638 break;
639 }
640 break;
641
642
643 case 3: // BI_BITFIELDS
644 switch ($thisfile_bmp_header_raw['bits_per_pixel']) {
645 case 16:
646 case 32:
647 $redshift = 0;
648 $greenshift = 0;
649 $blueshift = 0;
650 if (!$thisfile_bmp_header_raw['red_mask'] || !$thisfile_bmp_header_raw['green_mask'] || !$thisfile_bmp_header_raw['blue_mask']) {
651 $ThisFileInfo['error'][] = 'missing $thisfile_bmp_header_raw[(red|green|blue)_mask]';
652 return false;
653 }
654 while ((($thisfile_bmp_header_raw['red_mask'] >> $redshift) & 0x01) == 0) {
655 $redshift++;
656 }
657 while ((($thisfile_bmp_header_raw['green_mask'] >> $greenshift) & 0x01) == 0) {
658 $greenshift++;
659 }
660 while ((($thisfile_bmp_header_raw['blue_mask'] >> $blueshift) & 0x01) == 0) {
661 $blueshift++;
662 }
663 for ($row = ($thisfile_bmp_header_raw['height'] - 1); $row >= 0; $row--) {
664 for ($col = 0; $col < $thisfile_bmp_header_raw['width']; $col++) {
665 $pixelvalue = $this->LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset, $thisfile_bmp_header_raw['bits_per_pixel'] / 8));
666 $pixeldataoffset += $thisfile_bmp_header_raw['bits_per_pixel'] / 8;
667
668 $red = intval(round(((($pixelvalue & $thisfile_bmp_header_raw['red_mask']) >> $redshift) / ($thisfile_bmp_header_raw['red_mask'] >> $redshift)) * 255));
669 $green = intval(round(((($pixelvalue & $thisfile_bmp_header_raw['green_mask']) >> $greenshift) / ($thisfile_bmp_header_raw['green_mask'] >> $greenshift)) * 255));
670 $blue = intval(round(((($pixelvalue & $thisfile_bmp_header_raw['blue_mask']) >> $blueshift) / ($thisfile_bmp_header_raw['blue_mask'] >> $blueshift)) * 255));
671 $thisfile_bmp['data'][$row][$col] = (($red << 16) | ($green << 8) | ($blue));
672 }
673 while (($pixeldataoffset % 4) != 0) {
674 // lines are padded to nearest DWORD
675 $pixeldataoffset++;
676 }
677 }
678 break;
679
680 default:
681 $ThisFileInfo['error'][] = 'Unknown bits-per-pixel value ('.$thisfile_bmp_header_raw['bits_per_pixel'].') - cannot read pixel data';
682 break;
683 }
684 break;
685
686
687 default: // unhandled compression type
688 $ThisFileInfo['error'][] = 'Unknown/unhandled compression type value ('.$thisfile_bmp_header_raw['compression'].') - cannot decompress pixel data';
689 break;
690 }
691 }
692
693 return true;
694 }
695
696 function IntColor2RGB($color) {
697 $red = ($color & 0x00FF0000) >> 16;
698 $green = ($color & 0x0000FF00) >> 8;
699 $blue = ($color & 0x000000FF);
700 return array($red, $green, $blue);
701 }
702
703 function PlotPixelsGD(&$BMPdata, $truecolor=true) {
704 $imagewidth = $BMPdata['header']['raw']['width'];
705 $imageheight = $BMPdata['header']['raw']['height'];
706
707 if ($truecolor) {
708
709 $gd = @ImageCreateTrueColor($imagewidth, $imageheight);
710
711 } else {
712
713 $gd = @ImageCreate($imagewidth, $imageheight);
714 if (!empty($BMPdata['palette'])) {
715 // create GD palette from BMP palette
716 foreach ($BMPdata['palette'] as $dummy => $color) {
717 list($r, $g, $b) = $this->IntColor2RGB($color);
718 ImageColorAllocate($gd, $r, $g, $b);
719 }
720 } else {
721 // create 216-color websafe palette
722 for ($r = 0x00; $r <= 0xFF; $r += 0x33) {
723 for ($g = 0x00; $g <= 0xFF; $g += 0x33) {
724 for ($b = 0x00; $b <= 0xFF; $b += 0x33) {
725 ImageColorAllocate($gd, $r, $g, $b);
726 }
727 }
728 }
729 }
730
731 }
732 if (!is_resource($gd)) {
733 return false;
734 }
735
736 foreach ($BMPdata['data'] as $row => $colarray) {
737 if (!phpthumb_functions::FunctionIsDisabled('set_time_limit')) {
738 set_time_limit(30);
739 }
740 foreach ($colarray as $col => $color) {
741 list($red, $green, $blue) = $this->IntColor2RGB($color);
742 if ($truecolor) {
743 $pixelcolor = ImageColorAllocate($gd, $red, $green, $blue);
744 } else {
745 $pixelcolor = ImageColorClosest($gd, $red, $green, $blue);
746 }
747 ImageSetPixel($gd, $col, $row, $pixelcolor);
748 }
749 }
750 return $gd;
751 }
752
753 function PlotBMP(&$BMPinfo) {
754 $starttime = time();
755 if (!isset($BMPinfo['bmp']['data']) || !is_array($BMPinfo['bmp']['data'])) {
756 echo 'ERROR: no pixel data<BR>';
757 return false;
758 }
759 if (!phpthumb_functions::FunctionIsDisabled('set_time_limit')) {
760 set_time_limit(intval(round($BMPinfo['resolution_x'] * $BMPinfo['resolution_y'] / 10000)));
761 }
762 $im = $this->PlotPixelsGD($BMPinfo['bmp']);
763 if (headers_sent()) {
764 echo 'plotted '.($BMPinfo['resolution_x'] * $BMPinfo['resolution_y']).' pixels in '.(time() - $starttime).' seconds<BR>';
765 ImageDestroy($im);
766 exit;
767 } else {
768 header('Content-Type: image/png');
769 ImagePNG($im);
770 ImageDestroy($im);
771 return true;
772 }
773 return false;
774 }
775
776 function BMPcompressionWindowsLookup($compressionid) {
777 static $BMPcompressionWindowsLookup = array(
778 0 => 'BI_RGB',
779 1 => 'BI_RLE8',
780 2 => 'BI_RLE4',
781 3 => 'BI_BITFIELDS',
782 4 => 'BI_JPEG',
783 5 => 'BI_PNG'
784 );
785 return (isset($BMPcompressionWindowsLookup[$compressionid]) ? $BMPcompressionWindowsLookup[$compressionid] : 'invalid');
786 }
787
788 function BMPcompressionOS2Lookup($compressionid) {
789 static $BMPcompressionOS2Lookup = array(
790 0 => 'BI_RGB',
791 1 => 'BI_RLE8',
792 2 => 'BI_RLE4',
793 3 => 'Huffman 1D',
794 4 => 'BI_RLE24',
795 );
796 return (isset($BMPcompressionOS2Lookup[$compressionid]) ? $BMPcompressionOS2Lookup[$compressionid] : 'invalid');
797 }
798
799
800 // from getid3.lib.php
801
802 function trunc($floatnumber) {
803 // truncates a floating-point number at the decimal point
804 // returns int (if possible, otherwise float)
805 if ($floatnumber >= 1) {
806 $truncatednumber = floor($floatnumber);
807 } elseif ($floatnumber <= -1) {
808 $truncatednumber = ceil($floatnumber);
809 } else {
810 $truncatednumber = 0;
811 }
812 if ($truncatednumber <= 1073741824) { // 2^30
813 $truncatednumber = (int) $truncatednumber;
814 }
815 return $truncatednumber;
816 }
817
818 function LittleEndian2Int($byteword) {
819 $intvalue = 0;
820 $byteword = strrev($byteword);
821 $bytewordlen = strlen($byteword);
822 for ($i = 0; $i < $bytewordlen; $i++) {
823 $intvalue += ord($byteword{$i}) * pow(256, ($bytewordlen - 1 - $i));
824 }
825 return $intvalue;
826 }
827
828 function BigEndian2Int($byteword) {
829 return $this->LittleEndian2Int(strrev($byteword));
830 }
831
832 function BigEndian2Bin($byteword) {
833 $binvalue = '';
834 $bytewordlen = strlen($byteword);
835 for ($i = 0; $i < $bytewordlen; $i++) {
836 $binvalue .= str_pad(decbin(ord($byteword{$i})), 8, '0', STR_PAD_LEFT);
837 }
838 return $binvalue;
839 }
840
841 function FixedPoint2_30($rawdata) {
842 $binarystring = $this->BigEndian2Bin($rawdata);
843 return $this->Bin2Dec(substr($binarystring, 0, 2)) + (float) ($this->Bin2Dec(substr($binarystring, 2, 30)) / 1073741824);
844 }
845
846 function Bin2Dec($binstring, $signed=false) {
847 $signmult = 1;
848 if ($signed) {
849 if ($binstring{0} == '1') {
850 $signmult = -1;
851 }
852 $binstring = substr($binstring, 1);
853 }
854 $decvalue = 0;
855 for ($i = 0; $i < strlen($binstring); $i++) {
856 $decvalue += ((int) substr($binstring, strlen($binstring) - $i - 1, 1)) * pow(2, $i);
857 }
858 return $this->CastAsInt($decvalue * $signmult);
859 }
860
861 function CastAsInt($floatnum) {
862 // convert to float if not already
863 $floatnum = (float) $floatnum;
864
865 // convert a float to type int, only if possible
866 if ($this->trunc($floatnum) == $floatnum) {
867 // it's not floating point
868 if ($floatnum <= 1073741824) { // 2^30
869 // it's within int range
870 $floatnum = (int) $floatnum;
871 }
872 }
873 return $floatnum;
874 }
875
876}
877
878?>
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