--- /dev/null
+<?php
+/////////////////////////////////////////////////////////////////
+/// getID3() by James Heinrich <info@getid3.org> //
+// available at http://getid3.sourceforge.net //
+// or http://www.getid3.org //
+// also https://github.com/JamesHeinrich/getID3 //
+/////////////////////////////////////////////////////////////////
+// See readme.txt for more details //
+/////////////////////////////////////////////////////////////////
+// //
+// module.graphic.bmp.php //
+// module for analyzing BMP Image files //
+// dependencies: NONE //
+// ///
+/////////////////////////////////////////////////////////////////
+
+
+class getid3_bmp extends getid3_handler
+{
+ public $ExtractPalette = false;
+ public $ExtractData = false;
+
+ public function Analyze() {
+ $info = &$this->getid3->info;
+
+ // shortcuts
+ $info['bmp']['header']['raw'] = array();
+ $thisfile_bmp = &$info['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;
+
+ $this->fseek($info['avdataoffset']);
+ $offset = 0;
+ $BMPheader = $this->fread(14 + 40);
+
+ $thisfile_bmp_header_raw['identifier'] = substr($BMPheader, $offset, 2);
+ $offset += 2;
+
+ $magic = 'BM';
+ if ($thisfile_bmp_header_raw['identifier'] != $magic) {
+ $this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($thisfile_bmp_header_raw['identifier']).'"');
+ unset($info['fileformat']);
+ unset($info['bmp']);
+ return false;
+ }
+
+ $thisfile_bmp_header_raw['filesize'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['reserved1'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
+ $offset += 2;
+ $thisfile_bmp_header_raw['reserved2'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
+ $offset += 2;
+ $thisfile_bmp_header_raw['data_offset'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['header_size'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+
+
+ // check if the hardcoded-to-1 "planes" is at offset 22 or 26
+ $planes22 = getid3_lib::LittleEndian2Int(substr($BMPheader, 22, 2));
+ $planes26 = getid3_lib::LittleEndian2Int(substr($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 {
+ $this->error('Unknown BMP subtype (or not a BMP file)');
+ unset($info['fileformat']);
+ unset($info['bmp']);
+ return false;
+ }
+
+ $info['fileformat'] = 'bmp';
+ $info['video']['dataformat'] = 'bmp';
+ $info['video']['lossless'] = true;
+ $info['video']['pixel_aspect_ratio'] = (float) 1;
+
+ if ($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 */
+
+ $thisfile_bmp_header_raw['width'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
+ $offset += 2;
+ $thisfile_bmp_header_raw['height'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
+ $offset += 2;
+ $thisfile_bmp_header_raw['planes'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
+ $offset += 2;
+ $thisfile_bmp_header_raw['bits_per_pixel'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
+ $offset += 2;
+
+ $info['video']['resolution_x'] = $thisfile_bmp_header_raw['width'];
+ $info['video']['resolution_y'] = $thisfile_bmp_header_raw['height'];
+ $info['video']['codec'] = 'BI_RGB '.$thisfile_bmp_header_raw['bits_per_pixel'].'-bit';
+ $info['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 */
+
+ $thisfile_bmp_header_raw['compression'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['bmp_data_size'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['resolution_h'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['resolution_v'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['colors_used'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['colors_important'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['resolution_units'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
+ $offset += 2;
+ $thisfile_bmp_header_raw['reserved1'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
+ $offset += 2;
+ $thisfile_bmp_header_raw['recording'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
+ $offset += 2;
+ $thisfile_bmp_header_raw['rendering'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
+ $offset += 2;
+ $thisfile_bmp_header_raw['size1'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['size2'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['color_encoding'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['identifier'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+
+ $thisfile_bmp_header['compression'] = $this->BMPcompressionOS2Lookup($thisfile_bmp_header_raw['compression']);
+
+ $info['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;
+
+ // possibly integrate this section and module.audio-video.riff.php::ParseBITMAPINFOHEADER() ?
+
+ $thisfile_bmp_header_raw['width'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4), true);
+ $offset += 4;
+ $thisfile_bmp_header_raw['height'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4), true);
+ $offset += 4;
+ $thisfile_bmp_header_raw['planes'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
+ $offset += 2;
+ $thisfile_bmp_header_raw['bits_per_pixel'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
+ $offset += 2;
+ $thisfile_bmp_header_raw['compression'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['bmp_data_size'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['resolution_h'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4), true);
+ $offset += 4;
+ $thisfile_bmp_header_raw['resolution_v'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4), true);
+ $offset += 4;
+ $thisfile_bmp_header_raw['colors_used'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['colors_important'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+
+ $thisfile_bmp_header['compression'] = $this->BMPcompressionWindowsLookup($thisfile_bmp_header_raw['compression']);
+ $info['video']['resolution_x'] = $thisfile_bmp_header_raw['width'];
+ $info['video']['resolution_y'] = $thisfile_bmp_header_raw['height'];
+ $info['video']['codec'] = $thisfile_bmp_header['compression'].' '.$thisfile_bmp_header_raw['bits_per_pixel'].'-bit';
+ $info['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 .= $this->fread(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;
+ $thisfile_bmp_header_raw['red_mask'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['green_mask'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['blue_mask'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['alpha_mask'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['cs_type'] = getid3_lib::LittleEndian2Int(substr($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;
+ $thisfile_bmp_header_raw['gamma_red'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['gamma_green'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['gamma_blue'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+
+ $thisfile_bmp_header['ciexyz_red'] = getid3_lib::FixedPoint2_30(strrev($thisfile_bmp_header_raw['ciexyz_red']));
+ $thisfile_bmp_header['ciexyz_green'] = getid3_lib::FixedPoint2_30(strrev($thisfile_bmp_header_raw['ciexyz_green']));
+ $thisfile_bmp_header['ciexyz_blue'] = getid3_lib::FixedPoint2_30(strrev($thisfile_bmp_header_raw['ciexyz_blue']));
+ }
+
+ if ($thisfile_bmp['type_version'] >= 5) {
+ $BMPheader .= $this->fread(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;
+ $thisfile_bmp_header_raw['intent'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['profile_data_offset'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['profile_data_size'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ $thisfile_bmp_header_raw['reserved3'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
+ $offset += 4;
+ }
+
+ } else {
+
+ $this->error('Unknown BMP format in header.');
+ return false;
+
+ }
+
+
+ if ($this->ExtractPalette || $this->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 = $this->fread(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;
+ $blue = getid3_lib::LittleEndian2Int(substr($BMPpalette, $paletteoffset++, 1));
+ $green = getid3_lib::LittleEndian2Int(substr($BMPpalette, $paletteoffset++, 1));
+ $red = getid3_lib::LittleEndian2Int(substr($BMPpalette, $paletteoffset++, 1));
+ if (($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) | $blue);
+ }
+ }
+ }
+
+ if ($this->ExtractData) {
+ $this->fseek($thisfile_bmp_header_raw['data_offset']);
+ $RowByteLength = ceil(($thisfile_bmp_header_raw['width'] * ($thisfile_bmp_header_raw['bits_per_pixel'] / 8)) / 4) * 4; // round up to nearest DWORD boundry
+ $BMPpixelData = $this->fread($thisfile_bmp_header_raw['height'] * $RowByteLength);
+ $pixeldataoffset = 0;
+ $thisfile_bmp_header_raw['compression'] = (isset($thisfile_bmp_header_raw['compression']) ? $thisfile_bmp_header_raw['compression'] : '');
+ switch ($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:
+ $this->error('Unknown bits-per-pixel value ('.$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)) {
+ $firstbyte = getid3_lib::LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
+ $secondbyte = getid3_lib::LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
+ if ($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.
+ $colincrement = getid3_lib::LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
+ $rowincrement = getid3_lib::LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
+ $col = ($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++) {
+ $paletteindex = getid3_lib::LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
+ $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:
+ $this->error('Unknown bits-per-pixel value ('.$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)) {
+ $firstbyte = getid3_lib::LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
+ $secondbyte = getid3_lib::LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
+ if ($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.
+ $colincrement = getid3_lib::LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
+ $rowincrement = getid3_lib::LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
+ $col = ($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']) + $col;
+ break;
+
+ default:
+ // In absolute mode, the first byte is zero. The second byte contains the number
+ // of color indexes that follow. Subsequent bytes contain color indexes in their
+ // high- and low-order 4 bits, one color index for each pixel. In absolute mode,
+ // each run must be aligned on a word boundary.
+ unset($paletteindexes);
+ for ($i = 0; $i < ceil($secondbyte / 2); $i++) {
+ $paletteindexbyte = getid3_lib::LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
+ $paletteindexes[] = ($paletteindexbyte & 0xF0) >> 4;
+ $paletteindexes[] = ($paletteindexbyte & 0x0F);
+ }
+ while (($pixeldataoffset % 2) != 0) {
+ // Each run must be aligned on a word boundary.
+ $pixeldataoffset++;
+ }
+
+ foreach ($paletteindexes as $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:
+ $this->error('Unknown bits-per-pixel value ('.$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;
+ $blueshift = 0;
+ while ((($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++) {
+ $pixelvalue = getid3_lib::LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset, $thisfile_bmp_header_raw['bits_per_pixel'] / 8));
+ $pixeldataoffset += $thisfile_bmp_header_raw['bits_per_pixel'] / 8;
+
+ $red = intval(round(((($pixelvalue & $thisfile_bmp_header_raw['red_mask']) >> $redshift) / ($thisfile_bmp_header_raw['red_mask'] >> $redshift)) * 255));
+ $green = intval(round(((($pixelvalue & $thisfile_bmp_header_raw['green_mask']) >> $greenshift) / ($thisfile_bmp_header_raw['green_mask'] >> $greenshift)) * 255));
+ $blue = intval(round(((($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:
+ $this->error('Unknown bits-per-pixel value ('.$thisfile_bmp_header_raw['bits_per_pixel'].') - cannot read pixel data');
+ break;
+ }
+ break;
+
+
+ default: // unhandled compression type
+ $this->error('Unknown/unhandled compression type value ('.$thisfile_bmp_header_raw['compression'].') - cannot decompress pixel data');
+ break;
+ }
+ }
+
+ return true;
+ }
+
+
+ public function PlotBMP(&$BMPinfo) {
+ $starttime = time();
+ if (!isset($BMPinfo['bmp']['data']) || !is_array($BMPinfo['bmp']['data'])) {
+ echo 'ERROR: no pixel data<BR>';
+ return false;
+ }
+ set_time_limit(intval(round($BMPinfo['resolution_x'] * $BMPinfo['resolution_y'] / 10000)));
+ if ($im = ImageCreateTrueColor($BMPinfo['resolution_x'], $BMPinfo['resolution_y'])) {
+ for ($row = 0; $row < $BMPinfo['resolution_y']; $row++) {
+ for ($col = 0; $col < $BMPinfo['resolution_x']; $col++) {
+ if (isset($BMPinfo['bmp']['data'][$row][$col])) {
+ $red = ($BMPinfo['bmp']['data'][$row][$col] & 0x00FF0000) >> 16;
+ $green = ($BMPinfo['bmp']['data'][$row][$col] & 0x0000FF00) >> 8;
+ $blue = ($BMPinfo['bmp']['data'][$row][$col] & 0x000000FF);
+ $pixelcolor = ImageColorAllocate($im, $red, $green, $blue);
+ ImageSetPixel($im, $col, $row, $pixelcolor);
+ } else {
+ //echo 'ERROR: no data for pixel '.$row.' x '.$col.'<BR>';
+ //return false;
+ }
+ }
+ }
+ if (headers_sent()) {
+ echo 'plotted '.($BMPinfo['resolution_x'] * $BMPinfo['resolution_y']).' pixels in '.(time() - $starttime).' seconds<BR>';
+ ImageDestroy($im);
+ exit;
+ } else {
+ header('Content-type: image/png');
+ ImagePNG($im);
+ ImageDestroy($im);
+ return true;
+ }
+ }
+ return false;
+ }
+
+ 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');
+ }
+
+}
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff
