874 lines
36 KiB
PHP
874 lines
36 KiB
PHP
<?php
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/////////////////////////////////////////////////////////////////
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/// getID3() by James Heinrich <info@getid3.org> //
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// available at http://getid3.sourceforge.net //
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// or http://www.getid3.org //
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/////////////////////////////////////////////////////////////////
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// See readme.txt for more details //
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/////////////////////////////////////////////////////////////////
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// //
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// module.graphic.bmp.php //
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// module for analyzing BMP Image files //
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// dependencies: NONE //
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// ///
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/////////////////////////////////////////////////////////////////
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// //
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// Modified for use in phpThumb() - James Heinrich 2004.07.27 //
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// //
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/////////////////////////////////////////////////////////////////
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class phpthumb_bmp {
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function phpthumb_bmp() {
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return true;
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}
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function phpthumb_bmp2gd(&$BMPdata, $truecolor=true) {
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$ThisFileInfo = array();
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if ($this->getid3_bmp($BMPdata, $ThisFileInfo, true, true)) {
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$gd = $this->PlotPixelsGD($ThisFileInfo['bmp'], $truecolor);
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return $gd;
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}
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return false;
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}
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function phpthumb_bmpfile2gd($filename, $truecolor=true) {
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if ($fp = @fopen($filename, 'rb')) {
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$BMPdata = fread($fp, filesize($filename));
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fclose($fp);
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return $this->phpthumb_bmp2gd($BMPdata, $truecolor);
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}
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return false;
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}
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function GD2BMPstring(&$gd_image) {
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$imageX = ImageSX($gd_image);
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$imageY = ImageSY($gd_image);
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$BMP = '';
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for ($y = ($imageY - 1); $y >= 0; $y--) {
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$thisline = '';
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for ($x = 0; $x < $imageX; $x++) {
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$argb = phpthumb_functions::GetPixelColor($gd_image, $x, $y);
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$thisline .= chr($argb['blue']).chr($argb['green']).chr($argb['red']);
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}
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while (strlen($thisline) % 4) {
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$thisline .= "\x00";
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}
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$BMP .= $thisline;
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}
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$bmpSize = strlen($BMP) + 14 + 40;
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// BITMAPFILEHEADER [14 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_62uq.asp
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$BITMAPFILEHEADER = 'BM'; // WORD bfType;
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$BITMAPFILEHEADER .= phpthumb_functions::LittleEndian2String($bmpSize, 4); // DWORD bfSize;
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$BITMAPFILEHEADER .= phpthumb_functions::LittleEndian2String( 0, 2); // WORD bfReserved1;
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$BITMAPFILEHEADER .= phpthumb_functions::LittleEndian2String( 0, 2); // WORD bfReserved2;
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$BITMAPFILEHEADER .= phpthumb_functions::LittleEndian2String( 54, 4); // DWORD bfOffBits;
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// BITMAPINFOHEADER - [40 bytes] http://msdn.microsoft.com/library/en-us/gdi/bitmaps_1rw2.asp
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$BITMAPINFOHEADER = phpthumb_functions::LittleEndian2String( 40, 4); // DWORD biSize;
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$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( $imageX, 4); // LONG biWidth;
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$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( $imageY, 4); // LONG biHeight;
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$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 1, 2); // WORD biPlanes;
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$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 24, 2); // WORD biBitCount;
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$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 0, 4); // DWORD biCompression;
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$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 0, 4); // DWORD biSizeImage;
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$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 2835, 4); // LONG biXPelsPerMeter;
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$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 2835, 4); // LONG biYPelsPerMeter;
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$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 0, 4); // DWORD biClrUsed;
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$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String( 0, 4); // DWORD biClrImportant;
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return $BITMAPFILEHEADER.$BITMAPINFOHEADER.$BMP;
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}
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function getid3_bmp(&$BMPdata, &$ThisFileInfo, $ExtractPalette=false, $ExtractData=false) {
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// shortcuts
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$ThisFileInfo['bmp']['header']['raw'] = array();
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$thisfile_bmp = &$ThisFileInfo['bmp'];
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$thisfile_bmp_header = &$thisfile_bmp['header'];
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$thisfile_bmp_header_raw = &$thisfile_bmp_header['raw'];
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// BITMAPFILEHEADER [14 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_62uq.asp
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// all versions
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// WORD bfType;
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// DWORD bfSize;
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// WORD bfReserved1;
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// WORD bfReserved2;
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// DWORD bfOffBits;
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$offset = 0;
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$overalloffset = 0;
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$BMPheader = substr($BMPdata, $overalloffset, 14 + 40);
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$overalloffset += (14 + 40);
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$thisfile_bmp_header_raw['identifier'] = substr($BMPheader, $offset, 2);
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$offset += 2;
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if ($thisfile_bmp_header_raw['identifier'] != 'BM') {
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$ThisFileInfo['error'][] = 'Expecting "BM" at offset '.$ThisFileInfo['avdataoffset'].', found "'.$thisfile_bmp_header_raw['identifier'].'"';
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unset($ThisFileInfo['fileformat']);
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unset($ThisFileInfo['bmp']);
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return false;
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}
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$thisfile_bmp_header_raw['filesize'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['reserved1'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$thisfile_bmp_header_raw['reserved2'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$thisfile_bmp_header_raw['data_offset'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['header_size'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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// check if the hardcoded-to-1 "planes" is at offset 22 or 26
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$planes22 = $this->LittleEndian2Int(substr($BMPheader, 22, 2));
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$planes26 = $this->LittleEndian2Int(substr($BMPheader, 26, 2));
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if (($planes22 == 1) && ($planes26 != 1)) {
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$thisfile_bmp['type_os'] = 'OS/2';
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$thisfile_bmp['type_version'] = 1;
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} elseif (($planes26 == 1) && ($planes22 != 1)) {
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$thisfile_bmp['type_os'] = 'Windows';
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$thisfile_bmp['type_version'] = 1;
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} elseif ($thisfile_bmp_header_raw['header_size'] == 12) {
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$thisfile_bmp['type_os'] = 'OS/2';
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$thisfile_bmp['type_version'] = 1;
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} elseif ($thisfile_bmp_header_raw['header_size'] == 40) {
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$thisfile_bmp['type_os'] = 'Windows';
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$thisfile_bmp['type_version'] = 1;
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} elseif ($thisfile_bmp_header_raw['header_size'] == 84) {
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$thisfile_bmp['type_os'] = 'Windows';
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$thisfile_bmp['type_version'] = 4;
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} elseif ($thisfile_bmp_header_raw['header_size'] == 100) {
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$thisfile_bmp['type_os'] = 'Windows';
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$thisfile_bmp['type_version'] = 5;
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} else {
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$ThisFileInfo['error'][] = 'Unknown BMP subtype (or not a BMP file)';
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unset($ThisFileInfo['fileformat']);
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unset($ThisFileInfo['bmp']);
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return false;
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}
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$ThisFileInfo['fileformat'] = 'bmp';
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$ThisFileInfo['video']['dataformat'] = 'bmp';
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$ThisFileInfo['video']['lossless'] = true;
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$ThisFileInfo['video']['pixel_aspect_ratio'] = (float) 1;
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if ($thisfile_bmp['type_os'] == 'OS/2') {
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// OS/2-format BMP
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// http://netghost.narod.ru/gff/graphics/summary/os2bmp.htm
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// DWORD Size; /* Size of this structure in bytes */
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// DWORD Width; /* Bitmap width in pixels */
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// DWORD Height; /* Bitmap height in pixel */
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// WORD NumPlanes; /* Number of bit planes (color depth) */
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// WORD BitsPerPixel; /* Number of bits per pixel per plane */
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$thisfile_bmp_header_raw['width'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$thisfile_bmp_header_raw['height'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$thisfile_bmp_header_raw['planes'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$thisfile_bmp_header_raw['bits_per_pixel'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$ThisFileInfo['video']['resolution_x'] = $thisfile_bmp_header_raw['width'];
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$ThisFileInfo['video']['resolution_y'] = $thisfile_bmp_header_raw['height'];
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$ThisFileInfo['video']['codec'] = 'BI_RGB '.$thisfile_bmp_header_raw['bits_per_pixel'].'-bit';
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$ThisFileInfo['video']['bits_per_sample'] = $thisfile_bmp_header_raw['bits_per_pixel'];
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if ($thisfile_bmp['type_version'] >= 2) {
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// DWORD Compression; /* Bitmap compression scheme */
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// DWORD ImageDataSize; /* Size of bitmap data in bytes */
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// DWORD XResolution; /* X resolution of display device */
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// DWORD YResolution; /* Y resolution of display device */
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// DWORD ColorsUsed; /* Number of color table indices used */
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// DWORD ColorsImportant; /* Number of important color indices */
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// WORD Units; /* Type of units used to measure resolution */
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// WORD Reserved; /* Pad structure to 4-byte boundary */
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// WORD Recording; /* Recording algorithm */
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// WORD Rendering; /* Halftoning algorithm used */
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// DWORD Size1; /* Reserved for halftoning algorithm use */
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// DWORD Size2; /* Reserved for halftoning algorithm use */
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// DWORD ColorEncoding; /* Color model used in bitmap */
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// DWORD Identifier; /* Reserved for application use */
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$thisfile_bmp_header_raw['compression'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['bmp_data_size'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['resolution_h'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['resolution_v'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['colors_used'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['colors_important'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['resolution_units'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$thisfile_bmp_header_raw['reserved1'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$thisfile_bmp_header_raw['recording'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$thisfile_bmp_header_raw['rendering'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$thisfile_bmp_header_raw['size1'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['size2'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['color_encoding'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['identifier'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header['compression'] = $this->BMPcompressionOS2Lookup($thisfile_bmp_header_raw['compression']);
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$ThisFileInfo['video']['codec'] = $thisfile_bmp_header['compression'].' '.$thisfile_bmp_header_raw['bits_per_pixel'].'-bit';
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}
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} elseif ($thisfile_bmp['type_os'] == 'Windows') {
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// Windows-format BMP
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// BITMAPINFOHEADER - [40 bytes] http://msdn.microsoft.com/library/en-us/gdi/bitmaps_1rw2.asp
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// all versions
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// DWORD biSize;
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// LONG biWidth;
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// LONG biHeight;
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// WORD biPlanes;
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// WORD biBitCount;
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// DWORD biCompression;
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// DWORD biSizeImage;
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// LONG biXPelsPerMeter;
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// LONG biYPelsPerMeter;
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// DWORD biClrUsed;
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// DWORD biClrImportant;
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$thisfile_bmp_header_raw['width'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4), true);
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$offset += 4;
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$thisfile_bmp_header_raw['height'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4), true);
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$offset += 4;
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$thisfile_bmp_header_raw['planes'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$thisfile_bmp_header_raw['bits_per_pixel'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$thisfile_bmp_header_raw['compression'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['bmp_data_size'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['resolution_h'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4), true);
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$offset += 4;
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$thisfile_bmp_header_raw['resolution_v'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4), true);
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$offset += 4;
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$thisfile_bmp_header_raw['colors_used'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['colors_important'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header['compression'] = $this->BMPcompressionWindowsLookup($thisfile_bmp_header_raw['compression']);
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$ThisFileInfo['video']['resolution_x'] = $thisfile_bmp_header_raw['width'];
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$ThisFileInfo['video']['resolution_y'] = $thisfile_bmp_header_raw['height'];
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$ThisFileInfo['video']['codec'] = $thisfile_bmp_header['compression'].' '.$thisfile_bmp_header_raw['bits_per_pixel'].'-bit';
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$ThisFileInfo['video']['bits_per_sample'] = $thisfile_bmp_header_raw['bits_per_pixel'];
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if (($thisfile_bmp['type_version'] >= 4) || ($thisfile_bmp_header_raw['compression'] == 3)) {
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// should only be v4+, but BMPs with type_version==1 and BI_BITFIELDS compression have been seen
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$BMPheader .= substr($BMPdata, $overalloffset, 44);
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$overalloffset += 44;
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// BITMAPV4HEADER - [44 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_2k1e.asp
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// Win95+, WinNT4.0+
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// DWORD bV4RedMask;
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// DWORD bV4GreenMask;
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// DWORD bV4BlueMask;
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// DWORD bV4AlphaMask;
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// DWORD bV4CSType;
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// CIEXYZTRIPLE bV4Endpoints;
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// DWORD bV4GammaRed;
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// DWORD bV4GammaGreen;
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// DWORD bV4GammaBlue;
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$thisfile_bmp_header_raw['red_mask'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['green_mask'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['blue_mask'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['alpha_mask'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['cs_type'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['ciexyz_red'] = substr($BMPheader, $offset, 4);
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$offset += 4;
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$thisfile_bmp_header_raw['ciexyz_green'] = substr($BMPheader, $offset, 4);
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$offset += 4;
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$thisfile_bmp_header_raw['ciexyz_blue'] = substr($BMPheader, $offset, 4);
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$offset += 4;
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$thisfile_bmp_header_raw['gamma_red'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['gamma_green'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['gamma_blue'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header['ciexyz_red'] = $this->FixedPoint2_30(strrev($thisfile_bmp_header_raw['ciexyz_red']));
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$thisfile_bmp_header['ciexyz_green'] = $this->FixedPoint2_30(strrev($thisfile_bmp_header_raw['ciexyz_green']));
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$thisfile_bmp_header['ciexyz_blue'] = $this->FixedPoint2_30(strrev($thisfile_bmp_header_raw['ciexyz_blue']));
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}
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if ($thisfile_bmp['type_version'] >= 5) {
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$BMPheader .= substr($BMPdata, $overalloffset, 16);
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$overalloffset += 16;
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// BITMAPV5HEADER - [16 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_7c36.asp
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// Win98+, Win2000+
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// DWORD bV5Intent;
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// DWORD bV5ProfileData;
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// DWORD bV5ProfileSize;
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// DWORD bV5Reserved;
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$thisfile_bmp_header_raw['intent'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['profile_data_offset'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['profile_data_size'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['reserved3'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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}
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} else {
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$ThisFileInfo['error'][] = 'Unknown BMP format in header.';
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return false;
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}
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if ($ExtractPalette || $ExtractData) {
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$PaletteEntries = 0;
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if ($thisfile_bmp_header_raw['bits_per_pixel'] < 16) {
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$PaletteEntries = pow(2, $thisfile_bmp_header_raw['bits_per_pixel']);
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} elseif (isset($thisfile_bmp_header_raw['colors_used']) && ($thisfile_bmp_header_raw['colors_used'] > 0) && ($thisfile_bmp_header_raw['colors_used'] <= 256)) {
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$PaletteEntries = $thisfile_bmp_header_raw['colors_used'];
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}
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if ($PaletteEntries > 0) {
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$BMPpalette = substr($BMPdata, $overalloffset, 4 * $PaletteEntries);
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$overalloffset += 4 * $PaletteEntries;
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$paletteoffset = 0;
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for ($i = 0; $i < $PaletteEntries; $i++) {
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// RGBQUAD - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_5f8y.asp
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// BYTE rgbBlue;
|
|
// BYTE rgbGreen;
|
|
// BYTE rgbRed;
|
|
// BYTE rgbReserved;
|
|
$blue = $this->LittleEndian2Int(substr($BMPpalette, $paletteoffset++, 1));
|
|
$green = $this->LittleEndian2Int(substr($BMPpalette, $paletteoffset++, 1));
|
|
$red = $this->LittleEndian2Int(substr($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) | ($blue));
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($ExtractData) {
|
|
$RowByteLength = ceil(($thisfile_bmp_header_raw['width'] * ($thisfile_bmp_header_raw['bits_per_pixel'] / 8)) / 4) * 4; // round up to nearest DWORD boundry
|
|
|
|
$BMPpixelData = substr($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 = $this->LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
|
|
$secondbyte = $this->LittleEndian2Int(substr($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 = $this->LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
|
|
$rowincrement = $this->LittleEndian2Int(substr($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 = $this->LittleEndian2Int(substr($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:
|
|
$ThisFileInfo['error'][] = 'Unknown bits-per-pixel value ('.$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 = $this->LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
|
|
$secondbyte = $this->LittleEndian2Int(substr($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 = $this->LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset++, 1));
|
|
$rowincrement = $this->LittleEndian2Int(substr($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 = $this->LittleEndian2Int(substr($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 $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;
|
|
|
|
$red = intval(round(((($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:
|
|
$ThisFileInfo['error'][] = 'Unknown bits-per-pixel value ('.$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;
|
|
}
|
|
|
|
function IntColor2RGB($color) {
|
|
$red = ($color & 0x00FF0000) >> 16;
|
|
$green = ($color & 0x0000FF00) >> 8;
|
|
$blue = ($color & 0x000000FF);
|
|
return array($red, $green, $blue);
|
|
}
|
|
|
|
function PlotPixelsGD(&$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)) {
|
|
return false;
|
|
}
|
|
|
|
foreach ($BMPdata['data'] as $row => $colarray) {
|
|
@set_time_limit(30);
|
|
foreach ($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 $gd;
|
|
}
|
|
|
|
function PlotBMP(&$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)));
|
|
$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;
|
|
} else {
|
|
header('Content-Type: image/png');
|
|
ImagePNG($im);
|
|
ImageDestroy($im);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
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');
|
|
}
|
|
|
|
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
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function trunc($floatnumber) {
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// truncates a floating-point number at the decimal point
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// returns int (if possible, otherwise float)
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if ($floatnumber >= 1) {
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$truncatednumber = floor($floatnumber);
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} elseif ($floatnumber <= -1) {
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$truncatednumber = ceil($floatnumber);
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} else {
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$truncatednumber = 0;
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}
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if ($truncatednumber <= 1073741824) { // 2^30
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$truncatednumber = (int) $truncatednumber;
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}
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return $truncatednumber;
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}
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function LittleEndian2Int($byteword) {
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$intvalue = 0;
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$byteword = strrev($byteword);
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$bytewordlen = strlen($byteword);
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for ($i = 0; $i < $bytewordlen; $i++) {
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$intvalue += ord($byteword{$i}) * pow(256, ($bytewordlen - 1 - $i));
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}
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return $intvalue;
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}
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function BigEndian2Int($byteword) {
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return $this->LittleEndian2Int(strrev($byteword));
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}
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function BigEndian2Bin($byteword) {
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$binvalue = '';
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$bytewordlen = strlen($byteword);
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for ($i = 0; $i < $bytewordlen; $i++) {
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$binvalue .= str_pad(decbin(ord($byteword{$i})), 8, '0', STR_PAD_LEFT);
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}
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return $binvalue;
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}
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function FixedPoint2_30($rawdata) {
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$binarystring = $this->BigEndian2Bin($rawdata);
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return $this->Bin2Dec(substr($binarystring, 0, 2)) + (float) ($this->Bin2Dec(substr($binarystring, 2, 30)) / 1073741824);
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}
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function Bin2Dec($binstring, $signed=false) {
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$signmult = 1;
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if ($signed) {
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if ($binstring{0} == '1') {
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$signmult = -1;
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}
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$binstring = substr($binstring, 1);
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}
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$decvalue = 0;
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for ($i = 0; $i < strlen($binstring); $i++) {
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$decvalue += ((int) substr($binstring, strlen($binstring) - $i - 1, 1)) * pow(2, $i);
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}
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return $this->CastAsInt($decvalue * $signmult);
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}
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function CastAsInt($floatnum) {
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// convert to float if not already
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$floatnum = (float) $floatnum;
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// convert a float to type int, only if possible
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if ($this->trunc($floatnum) == $floatnum) {
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// it's not floating point
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if ($floatnum <= 1073741824) { // 2^30
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// it's within int range
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$floatnum = (int) $floatnum;
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}
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}
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return $floatnum;
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}
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}
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?>
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