mirror of
https://github.com/Yetangitu/ampache
synced 2025-10-05 19:41:55 +02:00
cfaedb8e30
2.0 is supposedly still being developed, but the current version is not recommended by upstream, and 1.8 receives active updates and appears to work better on the files I tested. Fixes FS#169
686 lines
No EOL
31 KiB
PHP
686 lines
No EOL
31 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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class getid3_bmp
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{
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function getid3_bmp(&$fd, &$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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fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
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$offset = 0;
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$BMPheader = fread($fd, 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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$thisfile_bmp_header_raw['filesize'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['reserved1'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$thisfile_bmp_header_raw['reserved2'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$thisfile_bmp_header_raw['data_offset'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['header_size'] = getid3_lib::LittleEndian2Int(substr($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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$planes22 = getid3_lib::LittleEndian2Int(substr($BMPheader, 22, 2));
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$planes26 = getid3_lib::LittleEndian2Int(substr($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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$thisfile_bmp_header_raw['width'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$thisfile_bmp_header_raw['height'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$thisfile_bmp_header_raw['planes'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$thisfile_bmp_header_raw['bits_per_pixel'] = getid3_lib::LittleEndian2Int(substr($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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$thisfile_bmp_header_raw['compression'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['bmp_data_size'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['resolution_h'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['resolution_v'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['colors_used'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['colors_important'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['resolution_units'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$thisfile_bmp_header_raw['reserved1'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$thisfile_bmp_header_raw['recording'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$thisfile_bmp_header_raw['rendering'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$thisfile_bmp_header_raw['size1'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['size2'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['color_encoding'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['identifier'] = getid3_lib::LittleEndian2Int(substr($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 ($thisfile_bmp['type_os'] == 'Windows') {
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// Windows-format BMP
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// BITMAPINFOHEADER - [40 bytes] http://msdn.microsoft.com/library/en-us/gdi/bitmaps_1rw2.asp
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// all versions
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// DWORD biSize;
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// LONG biWidth;
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// LONG biHeight;
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// WORD biPlanes;
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// WORD biBitCount;
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// DWORD biCompression;
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// DWORD biSizeImage;
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// LONG biXPelsPerMeter;
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// LONG biYPelsPerMeter;
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// DWORD biClrUsed;
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// DWORD biClrImportant;
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// possibly integrate this section and module.audio-video.riff.php::ParseBITMAPINFOHEADER() ?
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$thisfile_bmp_header_raw['width'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4), true);
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$offset += 4;
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$thisfile_bmp_header_raw['height'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4), true);
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$offset += 4;
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$thisfile_bmp_header_raw['planes'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$thisfile_bmp_header_raw['bits_per_pixel'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 2));
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$offset += 2;
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$thisfile_bmp_header_raw['compression'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['bmp_data_size'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['resolution_h'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4), true);
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$offset += 4;
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$thisfile_bmp_header_raw['resolution_v'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4), true);
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$offset += 4;
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$thisfile_bmp_header_raw['colors_used'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['colors_important'] = getid3_lib::LittleEndian2Int(substr($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 .= fread($fd, 44);
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// BITMAPV4HEADER - [44 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_2k1e.asp
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// Win95+, WinNT4.0+
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// DWORD bV4RedMask;
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// DWORD bV4GreenMask;
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// DWORD bV4BlueMask;
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// DWORD bV4AlphaMask;
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// DWORD bV4CSType;
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// CIEXYZTRIPLE bV4Endpoints;
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// DWORD bV4GammaRed;
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// DWORD bV4GammaGreen;
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// DWORD bV4GammaBlue;
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$thisfile_bmp_header_raw['red_mask'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['green_mask'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['blue_mask'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['alpha_mask'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['cs_type'] = getid3_lib::LittleEndian2Int(substr($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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$thisfile_bmp_header_raw['gamma_red'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['gamma_green'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['gamma_blue'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header['ciexyz_red'] = getid3_lib::FixedPoint2_30(strrev($thisfile_bmp_header_raw['ciexyz_red']));
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$thisfile_bmp_header['ciexyz_green'] = getid3_lib::FixedPoint2_30(strrev($thisfile_bmp_header_raw['ciexyz_green']));
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$thisfile_bmp_header['ciexyz_blue'] = getid3_lib::FixedPoint2_30(strrev($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 .= fread($fd, 16);
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// BITMAPV5HEADER - [16 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_7c36.asp
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// Win98+, Win2000+
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// DWORD bV5Intent;
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// DWORD bV5ProfileData;
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// DWORD bV5ProfileSize;
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// DWORD bV5Reserved;
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$thisfile_bmp_header_raw['intent'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['profile_data_offset'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['profile_data_size'] = getid3_lib::LittleEndian2Int(substr($BMPheader, $offset, 4));
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$offset += 4;
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$thisfile_bmp_header_raw['reserved3'] = getid3_lib::LittleEndian2Int(substr($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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$BMPpalette = fread($fd, 4 * $PaletteEntries);
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$paletteoffset = 0;
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for ($i = 0; $i < $PaletteEntries; $i++) {
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// RGBQUAD - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_5f8y.asp
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// BYTE rgbBlue;
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// BYTE rgbGreen;
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// BYTE rgbRed;
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// BYTE rgbReserved;
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$blue = getid3_lib::LittleEndian2Int(substr($BMPpalette, $paletteoffset++, 1));
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$green = getid3_lib::LittleEndian2Int(substr($BMPpalette, $paletteoffset++, 1));
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$red = getid3_lib::LittleEndian2Int(substr($BMPpalette, $paletteoffset++, 1));
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if (($thisfile_bmp['type_os'] == 'OS/2') && ($thisfile_bmp['type_version'] == 1)) {
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// no padding byte
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} else {
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$paletteoffset++; // padding byte
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}
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$thisfile_bmp['palette'][$i] = (($red << 16) | ($green << 8) | $blue);
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}
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}
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}
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if ($ExtractData) {
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fseek($fd, $thisfile_bmp_header_raw['data_offset'], SEEK_SET);
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$RowByteLength = ceil(($thisfile_bmp_header_raw['width'] * ($thisfile_bmp_header_raw['bits_per_pixel'] / 8)) / 4) * 4; // round up to nearest DWORD boundry
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$BMPpixelData = fread($fd, $thisfile_bmp_header_raw['height'] * $RowByteLength);
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$pixeldataoffset = 0;
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$thisfile_bmp_header_raw['compression'] = (isset($thisfile_bmp_header_raw['compression']) ? $thisfile_bmp_header_raw['compression'] : '');
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switch ($thisfile_bmp_header_raw['compression']) {
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case 0: // BI_RGB
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switch ($thisfile_bmp_header_raw['bits_per_pixel']) {
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case 1:
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for ($row = ($thisfile_bmp_header_raw['height'] - 1); $row >= 0; $row--) {
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for ($col = 0; $col < $thisfile_bmp_header_raw['width']; $col = $col) {
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$paletteindexbyte = ord($BMPpixelData{$pixeldataoffset++});
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for ($i = 7; $i >= 0; $i--) {
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$paletteindex = ($paletteindexbyte & (0x01 << $i)) >> $i;
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$thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindex];
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$col++;
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}
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}
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while (($pixeldataoffset % 4) != 0) {
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// lines are padded to nearest DWORD
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$pixeldataoffset++;
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}
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}
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break;
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case 4:
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for ($row = ($thisfile_bmp_header_raw['height'] - 1); $row >= 0; $row--) {
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for ($col = 0; $col < $thisfile_bmp_header_raw['width']; $col = $col) {
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$paletteindexbyte = ord($BMPpixelData{$pixeldataoffset++});
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for ($i = 1; $i >= 0; $i--) {
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$paletteindex = ($paletteindexbyte & (0x0F << (4 * $i))) >> (4 * $i);
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$thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindex];
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$col++;
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}
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}
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while (($pixeldataoffset % 4) != 0) {
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// lines are padded to nearest DWORD
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$pixeldataoffset++;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 8:
|
|
for ($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)) {
|
|
$firstbyte = getid3_lib::LittleEndian2Int(substr($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:
|
|
$ThisFileInfo['error'][] = 'Unknown bits-per-pixel value ('.$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)) {
|
|
$firstbyte = getid3_lib::LittleEndian2Int(substr($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:
|
|
$ThisFileInfo['error'][] = 'Unknown bits-per-pixel value ('.$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;
|
|
$blueshift = 0;
|
|
while ((($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:
|
|
$ThisFileInfo['error'][] = 'Unknown bits-per-pixel value ('.$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 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;
|
|
}
|
|
|
|
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');
|
|
}
|
|
|
|
}
|
|
|
|
|
|
?>
|