pax_global_header00006660000000000000000000000064123523072530014514gustar00rootroot0000000000000052 comment=9060584b84ead2d18201e826131b3181713405cb gladtex-1.4.2/000077500000000000000000000000001235230725300131505ustar00rootroot00000000000000gladtex-1.4.2/CMakeLists.txt000066400000000000000000000026021235230725300157100ustar00rootroot00000000000000project(gladtex) cmake_minimum_required(VERSION 2.8.5) find_package(ZLIB REQUIRED) find_package(PNG REQUIRED) find_package(GIF) if(GIF_FOUND) include_directories(${GIF_INCLUDE_DIR}) add_definitions(-DGIF) endif() include_directories(${ZLIB_INCLUDE_DIRS} ${PNG_INCLUDE_DIRS}) set(eqn2img_SRCS eqn2img.c ) if(WIN32) set(eqn2img_SRCS ${eqn2img_SRCS} getopt.c) endif() if(MSVC) add_definitions(-D_CRT_SECURE_NO_WARNINGS -wd4996) endif() add_executable(eqn2img ${eqn2img_SRCS}) target_link_libraries(eqn2img ${ZLIB_LIBRARIES} ${PNG_LIBRARIES}) if(GIF_FOUND) target_link_libraries(eqn2img ${GIF_LIBRARIES}) endif(GIF_FOUND) find_program(POD2MAN pod2man) if(POD2MAN) message(STATUS "found pod2man for generation of documentation: ${POD2MAN}") add_custom_command(OUTPUT ${CMAKE_BINARY_DIR}/gladtex.1 COMMAND ${POD2MAN} ARGS -c \"User Commands\" -r \"gladtex 1.3\" ${CMAKE_SOURCE_DIR}/gladtex.pod > ${CMAKE_BINARY_DIR}/gladtex.1) add_custom_target(gladtex.1_custom ALL DEPENDS ${CMAKE_BINARY_DIR}/gladtex.1) endif() install(TARGETS eqn2img RUNTIME DESTINATION bin LIBRARY DESTINATION lib ARCHIVE DESTINATION lib) install(PROGRAMS gladtex DESTINATION bin) install(FILES eqn2img.1 DESTINATION share/man/man1) if(POD2MAN) install(FILES ${CMAKE_BINARY_DIR}/gladtex.1 DESTINATION share/man/man1) endif() gladtex-1.4.2/COPYING000066400000000000000000000432611235230725300142110ustar00rootroot00000000000000For all files, except for getopt.c, the license below applies. getop.c is public domain. GNU GENERAL PUBLIC LICENSE Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. This General Public License applies to most of the Free Software Foundation's software and to any other program whose authors commit to using it. (Some other Free Software Foundation software is covered by the GNU Library General Public License instead.) You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for this service if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that you know you can do these things. To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you modify it. For example, if you distribute copies of such a program, whether gratis or for a fee, you must give the recipients all the rights that you have. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights. We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal permission to copy, distribute and/or modify the software. Also, for each author's protection and ours, we want to make certain that everyone understands that there is no warranty for this free software. If the software is modified by someone else and passed on, we want its recipients to know that what they have is not the original, so that any problems introduced by others will not reflect on the original authors' reputations. Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that redistributors of a free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this, we have made it clear that any patent must be licensed for everyone's free use or not licensed at all. The precise terms and conditions for copying, distribution and modification follow. GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 0. This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License. The "Program", below, refers to any such program or work, and a "work based on the Program" means either the Program or any derivative work under copyright law: that is to say, a work containing the Program or a portion of it, either verbatim or with modifications and/or translated into another language. (Hereinafter, translation is included without limitation in the term "modification".) Each licensee is addressed as "you". Activities other than copying, distribution and modification are not covered by this License; they are outside its scope. The act of running the Program is not restricted, and the output from the Program is covered only if its contents constitute a work based on the Program (independent of having been made by running the Program). Whether that is true depends on what the Program does. 1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this License and to the absence of any warranty; and give any other recipients of the Program a copy of this License along with the Program. You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee. 2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the Program, and copy and distribute such modifications or work under the terms of Section 1 above, provided that you also meet all of these conditions: a) You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change. b) You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the Program or any part thereof, to be licensed as a whole at no charge to all third parties under the terms of this License. c) If the modified program normally reads commands interactively when run, you must cause it, when started running for such interactive use in the most ordinary way, to print or display an announcement including an appropriate copyright notice and a notice that there is no warranty (or else, saying that you provide a warranty) and that users may redistribute the program under these conditions, and telling the user how to view a copy of this License. (Exception: if the Program itself is interactive but does not normally print such an announcement, your work based on the Program is not required to print an announcement.) These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the Program, and can be reasonably considered independent and separate works in themselves, then this License, and its terms, do not apply to those sections when you distribute them as separate works. But when you distribute the same sections as part of a whole which is a work based on the Program, the distribution of the whole must be on the terms of this License, whose permissions for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote it. Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you; rather, the intent is to exercise the right to control the distribution of derivative or collective works based on the Program. In addition, mere aggregation of another work not based on the Program with the Program (or with a work based on the Program) on a volume of a storage or distribution medium does not bring the other work under the scope of this License. 3. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form under the terms of Sections 1 and 2 above provided that you also do one of the following: a) Accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, b) Accompany it with a written offer, valid for at least three years, to give any third party, for a charge no more than your cost of physically performing source distribution, a complete machine-readable copy of the corresponding source code, to be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, c) Accompany it with the information you received as to the offer to distribute corresponding source code. (This alternative is allowed only for noncommercial distribution and only if you received the program in object code or executable form with such an offer, in accord with Subsection b above.) The source code for a work means the preferred form of the work for making modifications to it. For an executable work, complete source code means all the source code for all modules it contains, plus any associated interface definition files, plus the scripts used to control compilation and installation of the executable. However, as a special exception, the source code distributed need not include anything that is normally distributed (in either source or binary form) with the major components (compiler, kernel, and so on) of the operating system on which the executable runs, unless that component itself accompanies the executable. If distribution of executable or object code is made by offering access to copy from a designated place, then offering equivalent access to copy the source code from the same place counts as distribution of the source code, even though third parties are not compelled to copy the source along with the object code. 4. You may not copy, modify, sublicense, or distribute the Program except as expressly provided under this License. Any attempt otherwise to copy, modify, sublicense or distribute the Program is void, and will automatically terminate your rights under this License. However, parties who have received copies, or rights, from you under this License will not have their licenses terminated so long as such parties remain in full compliance. 5. You are not required to accept this License, since you have not signed it. However, nothing else grants you permission to modify or distribute the Program or its derivative works. These actions are prohibited by law if you do not accept this License. Therefore, by modifying or distributing the Program (or any work based on the Program), you indicate your acceptance of this License to do so, and all its terms and conditions for copying, distributing or modifying the Program or works based on it. 6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted herein. You are not responsible for enforcing compliance by third parties to this License. 7. If, as a consequence of a court judgment or allegation of patent infringement or for any other reason (not limited to patent issues), conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot distribute so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not distribute the Program at all. For example, if a patent license would not permit royalty-free redistribution of the Program by all those who receive copies directly or indirectly through you, then the only way you could satisfy both it and this License would be to refrain entirely from distribution of the Program. If any portion of this section is held invalid or unenforceable under any particular circumstance, the balance of the section is intended to apply and the section as a whole is intended to apply in other circumstances. It is not the purpose of this section to induce you to infringe any patents or other property right claims or to contest validity of any such claims; this section has the sole purpose of protecting the integrity of the free software distribution system, which is implemented by public license practices. Many people have made generous contributions to the wide range of software distributed through that system in reliance on consistent application of that system; it is up to the author/donor to decide if he or she is willing to distribute software through any other system and a licensee cannot impose that choice. This section is intended to make thoroughly clear what is believed to be a consequence of the rest of this License. 8. If the distribution and/or use of the Program is restricted in certain countries either by patents or by copyrighted interfaces, the original copyright holder who places the Program under this License may add an explicit geographical distribution limitation excluding those countries, so that distribution is permitted only in or among countries not thus excluded. In such case, this License incorporates the limitation as if written in the body of this License. 9. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies a version number of this License which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of this License, you may choose any version ever published by the Free Software Foundation. 10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. NO WARRANTY 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Copyright (C) 19yy This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) 19yy name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker. , 1 April 1989 Ty Coon, President of Vice This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Library General Public License instead of this License. gladtex-1.4.2/README000066400000000000000000000042211235230725300140270ustar00rootroot00000000000000*contents* * License * Installation * Installation Hints For Windows * Documentation License ======= gladTeX --- generate html with LaTeX equations embedded as images _Copyright:_ - (C) 1999-2010 Martin G. Gulbrandsen - (C) 2011-2013 Jonathan Daugherty (especially release 1.3) - (C) 2013-2014 Sebastian Humenda Credits go to - 2013 Patrick Spendrin (patches for cmake and eqn2img to build it on Windows) This program is distributed under the GNU GPL; for details see the accompanying file COPYING. Project homepage is at http://gladtex.sourceforge.net Installation ============ Dependencies ------------ The following is needed for compiling Gladtex: * zlib * libgif, libpng (development headers) * gcc and cmake (at least on GNU/Linux)and make, but see below) * you can use cmake to use other build systems as well * perl (for pod2man) For Debian, you need just the command: # apt-get install build-essential libzlib1g-dev libpng12-dev libgif-dev # apt-get install perl cmake The following is needed for executing gladTeX: * a working LaTeX-distribution with the commands dvipng and latex * zlib * libpng, libgif * perl For Debian, you run: # apt-get install perl dvipng texlive-latex-base libpng12 libgif libzlib1g Installation using cmake ------------------------ If you have installed the requirements, and gladtex/ is your source folder run the following commands. p@mymachine ~/gladtex $ mkdir build && cd build p@mymachine ~/gladtex/build $ cmake ~/gladtex -DCMAKE_INSTALL_PREFIX=/usr p@mymachine ~/gladtex/build $ make && make install Windows ======= If you want to run GladTeX on Windows, you have to install cmake and a compiler suite as visual studio. Tell cmake to export visual studio project files and use those to build the project. To execute GladTeX you will either need perl or compile it. For compilation, you need `pp` (accompanies perl) and execute: $ pp -o gladtex gladtex.pl Finaly, you have to make sure that the executables to gladtex, ghostscript, latex and dvips are in `%PATH%`. We would currently suggest installing MikTeX. Documentation ============= Please use `man gladtex` for further instructions. gladtex-1.4.2/WHATSNEW000066400000000000000000000062451235230725300143420ustar00rootroot000000000000001.4.2 - add some eval's to cope with some failures - since there were some incompatibilies between Perl 5.10 and 5.18 in how the cache of the generated images is stored, GladTeX now removes this file along with all images starting with "eqn" and generates them again. 1.4.1 - remove desc.html if created and empty 1.4 - put LaTeX equations into alt tag for text-mode browsers and blind people (and disabled images) - if requested (-a), exclude equations longer than 80 characters in an extra file and make the equation image a link to the longer, excluded image alternative - eqn2img: patch to allow building on windows - change build system from make to cmake - refactored gladtex code a lot to allow the usage of "use strict/use warnings" - fix bug where multiple equations couldn't on a single line - rework manpage 1.3 - Un-escape common entities before processing equations - Update man page with CSS class options - Add support for setting the CSS class of images when the environment is "math" or "displaymath" - eqn2img: changed redirection syntax (from dvips to /dev/null) for portability - gladtex: exit with status 1 when a closing EQ tag is missing - gladtex: print error messages to stderr instead of stdout - Fix environment-passing to eqn2img - Add support for a "dpi" attribute on EQ tags to customize the DPI used for each equation 1.2 - Fixed a serious memory allocation error, pointed out by Eric J. Francois. Also fixed several leaks. - Added full alpha channel to PNG files (also suggested by Eric) - The -e option was ignored, fixed (pointed out by Andr\'e Schleife) - Added man page, contributed by Volker Schatz 1.1 - Portability fixes: Do not assume a specific location for perl (use "env" in the shebang line) and do not rely on the bash style "&>" redirection. 1.0 - Image alignment workaround (most browsers interpret "ALIGN=MIDDLE" somewhat strangely, so it has been changed to "STYLE=vertical-align: -xx") - Added cache file, so that gladtex doesn't have to regenerate images for equations that haven't changed. - Added ENV option (as in ) to support environments other than "displaymath". - Bug fixes. 0.3 - Added BoundingBox workaround (dvips sometimes outputs wrong BoundingBox, for instance when using \mathbb{}) - Moved the whole "LaTeX eqn to image" conversion into the C code, turning the C program (renamed from pngmodify to eqn2img) into a standalone utility (e.g. echo '\sqrt{2}' | eqn2img -o eqn.png). - Added colour options (-c -b and -t). - Fixed bug causing segfault when adding space _above_ an image. - Fixed image reusing bug (in 0.2 image reuse didn't work across separate files when processing files outside startup cwd). - And some other minor bugs and cosmetic changes. - Makefile added to distribution 0.2 - First official release, completely rewritten code. 0.1 - Used only internally at the Dept. of Mathematics at the Univ. of Oslo July-August 1999 (for the project "Matteknekker'n") under the name htmleqn. gladtex-1.4.2/eqn2img.1000066400000000000000000000023601235230725300145750ustar00rootroot00000000000000.TH eqn2img .SH Name .PP eqn2img \- read equation from stdin and generate image using LaTeX .SH SYNOPSIS .PP .B eqn2img [\fIOPTION\fR]... .SH DESCRIPTION .PP The program reads a LaTeX maths string from standard input (stdin). The generated image written to stdout unless a filename is specified with the \-o option. Run eqn2img with \-f ? to list supported image formats. .PP This program is part of GladTeX. .TP \fB\-o\fR \Finame\fR output filename .TP \fB\-v\fR print verbose information .TP \fB\-f\fR \fIformat\fR store images in 'format' (png by default) .TP \fB\-s\fR \fIn\fR set oversampling factor for antialiasing to 'n' (4 by default) .TP \fB\-r\fR \fIdpi\fR set output resolution to 'dpi' dots per inch .TP \fB\-p\fR \fIstring\fR add 'string' to LaTeX preamble (e.g. \usepackage{...}) .TP \fB\-e\fR \fIenv\fR embed equation in \\begin{env}..\\end{env} (e.g. \-e 'align*') .TP \fB\-c\fR \fIcolour\fR set foreground RGB colour (000000 by default) .TP \fB\-b\fR \fIcolour\fR set background RGB colour (A0A0A0 by default, ignored for png) .TP \fB\-t\fR turn transparency OFF .SH About This Manual Page .PP This manual page is (C) 2014 Sebastian Humenda . It is licensed under the same license as the program. See file COPYING for details. gladtex-1.4.2/eqn2img.c000066400000000000000000000510761235230725300146670ustar00rootroot00000000000000/* eqn2img: converts LaTeX equation to image, part of gladtex Project homepage at http://gladtex.sourceforge.net Copyright (C) 1999-2010 Martin G. Gulbrandsen (C) 2014 Sebastian Humenda This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* Uncomment this for gif support */ /*#define GIF*/ #define BACKGROUND 0xFF #define MAX(a,b) ((a)>(b) ? (a) : (b)) /* returns least integer >= a/b */ #define DIV(a,b) (((a)/(b))*(b) == (a) ? (a)/(b) : (a)/(b) + 1) #define USAGE "\ This utility is part of\n\ gladtex version 1.4.1, Copyright (C) 1999-2010 Martin G. Gulbrandsen\n\ (C) 2014 Sebastian Humenda\n\ \n\ GladTXx comes with ABSOLUTELY NO WARRANTY. This is free software,\n\ and you are welcome to redistribute it under certain conditions;\n\ see the file COPYING for details.\n\ \n\ Usage: eqn2img [OPTION]...\n\ \n\ -o name output filename\n\ -v print verbose information\n\ -f format store images in 'format' (png by default)\n\ -s n set oversampling factor for antialiasing to 'n' (4 by default)\n\ -r dpi set output resolution to 'dpi' dots per inch\n\ -p string add 'string' to LaTeX preamble (e.g. \\usepackage{...})\n\ -e env embed equation in \\begin{env}..\\end{env} (e.g. -e 'align*')\n\ -c colour set foreground RGB colour (000000 by default)\n\ -b colour set background RGB colour (A0A0A0 by default, ignored for png)\n\ -t turn transparency OFF\n\ \n\ LaTeX maths string is read from stdin. Image written to stdout unless filename\n\ specified with -o option. Run with -f ? to list supported image formats.\n" #include #include #include #ifndef _WIN32 #include #else extern int optind; extern char *optarg; int getopt(int argc, char * const argv[], const char *optstring); #define STDOUT_FILENO _fileno(stdout) #define popen _popen #define pclose _pclose #endif #include #include #ifdef GIF #include #endif #define NEW(type,size) (type *) malloc(sizeof(type)*(size)) enum img_format {png #ifdef GIF ,gif #endif }; struct rgb { unsigned int red; unsigned int green; unsigned int blue; }; void split_name(char *filename, char **dir, char **base, char **ext); char *mk_basename(char *img_name); char *mk_dirname(char *img_name); png_structp png_initialize(FILE *fp, int *width, int *height); png_bytepp png_read(char *filename, int *width, int *height); png_bytepp img_modify(png_bytepp in_img, int width, int height, int supersample, int *new_width, int *new_height, int *baseline); int png_write(png_bytepp image, char *basename, int width, int height, struct rgb foreground, struct rgb background, int transparency); #ifdef GIF int gif_write(png_bytepp image, char *basename, int width, int height, struct rgb foreground, struct rgb background, int transparency); #endif int to_dvi(char *base_name, char *preamble, char *env, int verbose); int to_ps(char *base_name, int verbose); int to_png(char *base_name, int dpi, int supersample, int verbose); int main(int argc, char **argv) { char c; enum img_format format = png; int supersample = 4; char *img_name = NULL; char *basename = NULL; char *dirname = NULL; char *extname = NULL; char *png_inname = NULL; char *env = NULL; png_bytepp in_image, out_image; int height, width; int new_height, new_width, baseline; int retval=0; int verbose=0; int transparency=1; int dpi=100; struct rgb foreground = {0,0,0}; struct rgb background = {0xA0,0xA0,0xA0}; char *preamble = NULL; int i; /* parse command-line options */ while((c = getopt(argc, argv, "f:s:o:e:tvc:b:r:p:")) != EOF) { switch(c) { case 'f': if(!strcmp("png", optarg)) { format = png; } #ifdef GIF else if(!strcmp("gif", optarg)) { format = gif; } #endif else if(optarg[0]=='?') { printf("Supported image formats: png%s", #ifdef GIF ", gif" #endif "\n"); return 0; } else { fprintf(stderr, "\nUnknown format '%s'\n", optarg); return 1; } break; case 's': supersample = atoi(optarg); if(supersample <= 0) { fprintf(stderr, "\nOversampling factor %s is not a positive integer\n", optarg); return 1; } break; case 'o': img_name = NEW(char, strlen(optarg)+1); assert(img_name); strcpy(img_name, optarg); break; case 'e': env = NEW(char, strlen(optarg)+1); assert(env); strcpy(env, optarg); break; case 'v': verbose = 1; break; case 't': transparency = 0; break; case 'c': sscanf(optarg, "%02x%02x%02x", &foreground.red, &foreground.green, &foreground.blue); break; case 'b': sscanf(optarg, "%02x%02x%02x", &background.red, &background.green, &background.blue); break; case 'p': preamble = NEW(char, strlen(optarg)+1); assert(preamble); strcpy(preamble, optarg); break; case 'r': dpi = atoi(optarg); break; default: printf(USAGE); return 0; } } if(argc != optind) { printf(USAGE); return 0; } if(!preamble) { preamble = NEW(char, 1); assert(preamble); preamble[0] = '\0'; } if(!env) { env = NEW(char, 12); assert(env); strcpy(env, "displaymath"); } if(img_name) { split_name(img_name, &dirname, &basename, &extname); if(extname) sprintf(img_name, "%s.%s", basename, extname); else img_name = basename; } else { basename = NEW(char, 7); assert(basename); strcpy(basename, "noname"); dirname = NEW(char, 2); assert(dirname); strcpy(dirname, "."); } retval = chdir(dirname); assert(!retval); /* convert LaTeX equation text to image */ if(to_dvi(basename, preamble, env, verbose) || to_ps(basename, verbose) || to_png(basename, dpi, supersample, verbose)) { return 1; } /* read input png file */ png_inname = NEW(char, strlen(basename)+8); assert(png_inname); sprintf(png_inname, "%s.ps.png", basename); in_image = png_read(png_inname, &width, &height); unlink(png_inname); if(!in_image) { fprintf(stderr, "\nError reading '%s'\n", png_inname); return 1; } /* clean up */ free(preamble); free(dirname); free(basename); free(env); free(png_inname); /* process image */ out_image = img_modify(in_image, width, height, supersample, &new_width, &new_height, &baseline); for(i=0; i Writing png image"); retval = png_write(out_image, img_name, new_width, new_height, foreground, background, transparency); break; #ifdef GIF case gif: if(verbose) fprintf(stderr, " -> Writing gif image"); retval = gif_write(out_image, img_name, new_width, new_height, foreground, background, transparency); break; #endif } /* clean up */ for(i=0; i "dir" + "base" + "ext" "/base.ext" -> "" + "base" + "ext" "base.ext" -> "." + "base" + "ext" "dir/base" -> "dir" + "base" + NULL "dir/base." -> "dir" + "base + "" Memory for these strings is allocated by this function. */ void split_name(char *filename, char **dir, char **base, char **ext) { char *dot, *slash; slash = strrchr(filename, '/'); if(slash==NULL) { *dir = NEW(char,2); assert(*dir); strcpy(*dir, "."); } else { *dir = NEW(char, slash-filename+1); assert(*dir); strncpy(*dir, filename, slash-filename); (*dir)[slash-filename] = '\0'; filename = slash+1; /* advance pointer to after slash */ } dot = strrchr(filename, '.'); if(dot==NULL) { *base = NEW(char, strlen(filename)+1); assert(*base); strcpy(*base, filename); *ext = NULL; } else { *base = NEW(char, dot-filename+1); assert(*base); strncpy(*base, filename, dot-filename); (*base)[dot-filename] = '\0'; filename = dot+1; *ext = NEW(char, strlen(filename)+1); assert(*ext); strncpy(*ext, filename, strlen(filename)); (*ext)[strlen(filename)] = '\0'; } } /* input: filename output: width, height returns read png image, or NULL on error */ png_bytepp png_read(char *filename, int *width, int *height) { png_byte bit_depth, color_type; png_bytepp image; png_structp png_ptr; png_infop info_ptr; int row; FILE *fp; fp = fopen(filename, "rb"); if(!fp) return NULL; png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); assert(png_ptr); info_ptr = png_create_info_struct(png_ptr); assert(info_ptr); if(setjmp(png_jmpbuf(png_ptr))) { png_destroy_read_struct(&png_ptr, &info_ptr, NULL); fclose(fp); return NULL; } png_init_io(png_ptr, fp); png_read_info(png_ptr, info_ptr); /* change pixel encoding to 8 bits grayscale */ color_type = png_get_color_type(png_ptr, info_ptr); bit_depth = png_get_bit_depth(png_ptr, info_ptr); if(bit_depth < 8) png_set_packing(png_ptr); if(bit_depth == 16) png_set_strip_16(png_ptr); if(color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) png_set_expand(png_ptr); if(color_type != PNG_COLOR_TYPE_GRAY) { fprintf(stderr, "\nInput file is not grayscale.\n"); return NULL; } png_read_update_info(png_ptr, info_ptr); *width = png_get_image_width(png_ptr, info_ptr); *height = png_get_image_height(png_ptr, info_ptr); image = NEW(png_bytep, *height); assert(image); for(row=0; row<*height; row++) { image[row] = NEW(png_byte, *width); assert(image[row]); } png_read_image(png_ptr, image); png_read_end(png_ptr, NULL); png_destroy_read_struct(&png_ptr, &info_ptr, NULL); fclose(fp); return image; } /* get_pixel Returns the pixel color at coordinates (row, col). Negative coordinates and coordinates larger than width/height are allowed, and will return bg_color. */ png_byte get_pixel(png_bytepp img, int col, int row, int width, int height, png_byte bg_color) { if(row<0 || col<0 || row>=height || col>=width) return bg_color; return img[row][col]; } /* img_modify does the following: - find 'leading dot' in in_img (i.e. some non-white area in the leftmost end: the perl script prepends a . (full stop) to the equation being processed) - copy everything to the right of the dot to out_img (returned value), while downscaling+antialiasing the image (simply by averaging a 'supersample' times 'supersample' block to a single pixel) - return (in "baseline") the number of pixels from the bottom of the (downscaled) image to the baseline of the equation input: in_img, widt, height, supersample output: new_width, new_height, baseline returns new png image */ png_bytepp img_modify(png_bytepp in_img, int width, int height, int supersample, int *new_width, int *new_height, int *baseline) { int row, col; int dot_found = 0; int edge_found = 0; int row_count = 0; long row_sum = 0; int row_center; int col_start = 0; png_bytepp out_img; assert(in_img); /* find dot: vertical center and horisontal end (maybe it's better to find vertical end instead of center?) also wipe out dot */ for(col=0; col < width; col++) { int empty_col = 1; for(row=0; row < height; row++) { if((in_img[row])[col] != BACKGROUND) { (in_img[row])[col] = BACKGROUND; dot_found = 1; empty_col = 0; row_count++; row_sum += row; } } if(dot_found && empty_col) { /* col is 1st blank column after dot */ col_start = col; break; } } if(col == width) { fprintf(stderr, "\nImage doesn't start with a dot\n"); exit(1); } /* the next step is a workaround: sometimes dvips produces a wrong boundingbox in the ps-file (I've seen this when using the \mathbb font), resulting in a too wide image (the height is correct but the box is extended to the right). to solve this we remove any blank area to the right */ edge_found=0; for(col=width-1; col>=0 && !edge_found; col--) { for(row=0; row < height; row++) { if((in_img[row])[col] != BACKGROUND) { width = col+supersample; /* this is the true width (we add a small border) */ edge_found = 1; break; } } } /* row_sum/row_count should be the centre of the "leading dot", but the dot itself lies above the baseline, so we add a few pixels */ row_center = row_sum/row_count+supersample*2; *new_height = DIV(height, supersample); *new_width = DIV(width-col_start, supersample); *baseline = DIV(height-row_center,supersample); /* allocate memory for new image and initialize to all background */ out_img = NEW(png_bytep, *new_height); assert(out_img); for(row=0; row < *new_height; row++) { out_img[row] = NEW(png_byte, *new_width); assert(out_img[row]); memset(out_img[row], BACKGROUND, *new_width); } /* I guess the following could be done more efficiently, but this doesn't seem to be the bottle neck anyway (disc i/o is) */ for(row=0; row < *new_height; row++) { for(col=0; col < *new_width; col++) { int delta, epsilon; long pixel_sum = 0; for(delta=0; delta < supersample; delta++) { for(epsilon=0; epsilon < supersample; epsilon++) { pixel_sum += get_pixel(in_img, col_start + supersample*col + epsilon, supersample*row + delta, width, height, BACKGROUND); } } out_img[row][col] = pixel_sum/(supersample*supersample); } } return out_img; } /* write image to png file */ int png_write(png_bytepp image, char *img_name, int width, int height, struct rgb foreground, struct rgb background, int transparency) { FILE *fp=NULL; int i; png_byte trans[256]; png_structp png_ptr; png_color pal[256]; png_infop info_ptr; for(i=0; i<256; i++) { if(transparency) { pal[i].red = foreground.red; pal[i].green = foreground.green; pal[i].blue = foreground.blue; trans[i] = 255-i; } else { pal[i].red = (i*background.red + (255-i)*foreground.red)/255; pal[i].green = (i*background.green + (255-i)*foreground.green)/255; pal[i].blue = (i*background.blue + (255-i)*foreground.blue)/255; trans[i] = 255; } } if(img_name) { fp = fopen(img_name, "wb"); if(!fp) return -1; } else fp = stdout; png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); assert(png_ptr); info_ptr = png_create_info_struct(png_ptr); assert(info_ptr); /* error handling, libpng longjmps here on any error */ if(setjmp(png_jmpbuf(png_ptr))) { png_destroy_read_struct(&png_ptr, &info_ptr, NULL); fclose(fp); return -1; } png_init_io(png_ptr, fp); png_set_IHDR(png_ptr, info_ptr, width, height, 8, PNG_COLOR_TYPE_PALETTE, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); png_set_PLTE(png_ptr, info_ptr, pal, 256); png_set_tRNS(png_ptr, info_ptr, trans, 256, NULL); png_write_info(png_ptr, info_ptr); png_write_image(png_ptr, image); png_write_end(png_ptr, NULL); png_destroy_write_struct(&png_ptr, &info_ptr); return 0; } /* write image to gif file */ #ifdef GIF int gif_write(png_bytepp image, char *img_name, int width, int height, struct rgb foreground, struct rgb background, int transparency) { GifFileType *fp; GifColorType pal[256]; int i, row; ColorMapObject *color_map; unsigned char gc_ext[5] = { /* graphic control extension (to get transparent background) */ 0x01, /* flags: transparency color flag on */ 0x00, /* delay time */ 0x00, /* delay time cntd */ BACKGROUND, /* transparent color index */ 0x00 /* block terminator (probably not needed?) */ }; if(img_name) { fp = EGifOpenFileName(img_name, 0); if(!fp) return -1; } else fp = EGifOpenFileHandle(STDOUT_FILENO); for(i=0; i<256; i++) { pal[i].Red = (i*background.red + (255-i)*foreground.red)/255; pal[i].Green = (i*background.green + (255-i)*foreground.green)/255; pal[i].Blue = (i*background.blue + (255-i)*foreground.blue)/255; } color_map = MakeMapObject(256, pal); /* EGifSetGifVersion("89a"); this causes segfault (but is really required for transparency, I think) */ EGifPutScreenDesc(fp, width, height, 256, 255, color_map); if(transparency) { EGifPutExtension(fp, 0xF9, 4, gc_ext); /* this sets transparent color to background */ } EGifPutImageDesc(fp, 0, 0, width, height, 0, color_map); for(row=0; row dvi"); tex_file = fopen(tex_name, "w"); fprintf(tex_file, "\\nonstopmode\n" "\\documentclass[12pt]{article}\n" "\\pagestyle{empty}\n" "%s\n" "\\begin{document}\n" "\\begin{%s}\n" ".", preamble, env); /* copy equation text from stdin to tex_file */ while(!feof(stdin)) { char buf[256]; int n; n = fread(buf, 1, 256, stdin); fwrite(buf, 1, n, tex_file); } fprintf(tex_file, "\\end{%s}\n\\end{document}\n", env); fclose(tex_file); cmd = NEW(char, strlen(tex_name) + 19); assert(cmd); sprintf(cmd, "latex %s > /dev/null", tex_name); retval = system(cmd); unlink(tex_name); sprintf(tex_name, "%s.aux", basename); unlink(tex_name); if(retval) { sprintf(tex_name, "%s.dvi", basename); unlink(tex_name); fprintf(stderr, "\nError running LaTeX\n"); return -1; } sprintf(tex_name, "%s.log", basename); unlink(tex_name); free(tex_name); free(cmd); return 0; } int to_ps(char *basename, int verbose) { char *cmd; if(verbose) fprintf(stderr, " -> ps"); cmd = NEW(char, 2*strlen(basename) + 46); sprintf(cmd, "dvips -E -o %s.ps %s.dvi > /dev/null 2> /dev/null", basename, basename); if(system(cmd)) { fprintf(stderr, "\nError running dvips\n"); return -1; } sprintf(cmd, "%s.dvi", basename); unlink(cmd); free(cmd); return 0; } int to_png(char *basename, int dpi, int supersample, int verbose) { char *cmd; int start_x, start_y, end_x, end_y; int xsize, ysize, xoffset, yoffset; int retval; FILE *grep, *gs; if(verbose) fprintf(stderr, " -> png"); cmd = NEW(char, strlen(basename)+25); sprintf(cmd, "grep \"%%BoundingBox\" %s.ps", basename); grep = popen(cmd, "r"); retval = fscanf(grep, "%%%%BoundingBox: %i %i %i %i", &start_x, &start_y, &end_x, &end_y); assert(retval != EOF); pclose(grep); free(cmd); xsize = 1 + ((end_x - start_x) * dpi)/72; ysize = 1 + ((end_y - start_y) * dpi)/72; xsize *= supersample; ysize *= supersample; xoffset = start_x; yoffset = start_y; cmd = NEW(char, strlen(basename)+200); /* I didn't count those 200.. */ sprintf(cmd, "gs -sDEVICE=pngmono -sOutputFile=%s.ps.png -r%i -g%ix%i -q - %s.ps", basename, dpi*supersample, xsize, ysize, basename); gs = popen(cmd, "w"); fprintf(gs, "%i neg %i neg translate\n", xoffset, yoffset); pclose(gs); sprintf(cmd, "%s.ps", basename); unlink(cmd); free(cmd); return 0; } gladtex-1.4.2/getopt.c000066400000000000000000000072041235230725300146210ustar00rootroot00000000000000/* * Public Domain getopt - history below * */ /* * From: gwyn@brl-tgr.ARPA (Doug Gwyn ) Newsgroups: net.sources * Subject: getopt library routine Date: 30 Mar 85 04:45:33 GMT */ /* * getopt -- public domain version of standard System V routine * * Strictly enforces the System V Command Syntax Standard; provided by D A * Gwyn of BRL for generic ANSI C implementations * * #define STRICT to prevent acceptance of clustered options with arguments * and ommision of whitespace between option and arg. */ /* * Modified by Manuel Novoa III on 1/5/01 to use weak symbols. * Programs needing long options will link gnu_getopt instead. */ /* * Last public domain version 1.5 downloaded from uclibc CVS: * http://www.uclibc.org/cgi-bin/cvsweb/uClibc/libc/unistd/getopt.c * on 2003-02-18 by Dave Beckett and tidied: * Ran through "indent getopt.c -gnu" then fixed up the mess * Removed register - compilers are smart these days * ANSI-fied the declarations * Prefixed with raptor_ so that it doesn't clash with any getopt * linked in later. * on 2013-11-05 changed by Patrick Spendrin: * remove unneeded code */ #include #include int opterr; /* error => print message */ int optind; /* next argv[] index */ int optopt; /* Set for unknown arguments */ char *optarg; /* option parameter if any */ /* * Err: * program name argv[0] * specific message * defective option letter */ static int Err (char *name, const char *mess, int c) /* returns '?' */ { optopt = c; if (opterr) { (void) fprintf (stderr, "%s: %s -- %c\n", name, mess, c); } return '?'; /* erroneous-option marker */ } int getopt (int argc, char * const argv[], const char *optstring) { static int sp = 1; /* position within argument */ int osp; /* saved `sp' for param test */ #ifndef STRICT int oind; /* saved `optind' for param test */ #endif int c; /* option letter */ char *cp; /* -> option in `optstring' */ optarg = NULL; /* initialise getopt vars */ if (optind == 0) { optind = 1; opterr = 1; optopt = 1; optarg = NULL; } if (sp == 1) { /* fresh argument */ if (optind >= argc /* no more arguments */ || argv[optind][0] != '-' /* no more options */ || argv[optind][1] == '\0' /* not option; stdin */ ) return EOF; else if (strcmp (argv[optind], "--") == 0) { ++optind; /* skip over "--" */ return EOF; /* "--" marks end of options */ } } c = argv[optind][sp]; /* option letter */ osp = sp++; /* get ready for next letter */ #ifndef STRICT oind = optind; /* save optind for param test */ #endif if (argv[optind][sp] == '\0') { /* end of argument */ ++optind; /* get ready for next try */ sp = 1; /* beginning of next argument */ } if (c == ':' || c == '?' /* optstring syntax conflict */ || (cp = strchr (optstring, c)) == NULL) /* not found */ { return Err (argv[0], "illegal option", c); } if (cp[1] == ':') { /* option takes parameter */ #ifdef STRICT if (osp != 1) { return Err (argv[0], "option must not be clustered", c); } /* reset by end of argument */ if (sp != 1) { return Err (argv[0], "option must be followed by white space", c); } #else if (oind == optind) { /* argument w/o whitespace */ optarg = &argv[optind][sp]; sp = 1; /* beginning of next argument */ } else #endif if (optind >= argc) { return Err (argv[0], "option requires an argument", c); } else /* argument w/ whitespace */ optarg = argv[optind]; ++optind; /* skip over parameter */ } return c; } gladtex-1.4.2/gladtex000077500000000000000000000411661235230725300145360ustar00rootroot00000000000000#!/usr/bin/perl # vim:expandtab sts=4 ts=4 shiftwidth=4 number : # gladtex: Reads a 'htex' file (html with LaTeX maths embedded in ) # and produces html with equations substituted by images. # Project homepage at http://gladtex.sourceforge.net # Copyright (C) 1999-2010 Martin G. Gulbrandsen # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA # note: the utility 'eqn2img' should accompany this script, # and must be callable from this script. use warnings; use strict; use IPC::Open2; use Cwd; use Getopt::Std; use Storable; use File::Spec; our $img_dir = "."; # default values our $img_dir_relative = "."; our $dpi = 100; our $supersample = 4; our $format = "png"; my $verbose = 0; our $foreground = "000000"; our $background = "A0A0A0"; our $transparency = 1; our $environment = "displaymath"; our $blockMathClass = "displaymath"; our $inlineMathClass = "inlinemath"; my $preamble = " \\usepackage{amsmath} \\usepackage{amssymb} "; our $usage = "gladtex version 1.2, Copyright (C) 1999-2010 Martin G. Gulbrandsen gladtex comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to redistribute it under certain conditions; see the file COPYING for details. Project homepage at http://gladtex.sourceforge.net Usage: gladtex [OPTION]... [FILE]... Convert htex file (HTML with LaTeX equations) to html with images -a save text alternatives for images which are too long for the alt attribute into a single separate file and link images to it -b colour set background RGB colour ($background by default) -c colour set foreground RGB colour ($foreground by default) -d path store image files in 'path' (current directory is default), affects also place of image alternatives -e env embed LaTeX code in \\begin{env}..\\end{env} ($environment by default) -f format store images in 'format' (png by default) -i class CSS class to assign to inline math (default: 'inlinemath') -l class CSS class to assign to block-level math (default: 'displaymath') -p string add 'string' to LaTeX preamble (e.g. \\usepackage{...}) -r dpi set resolution (size of images) to 'dpi' ($dpi by default) -s n set oversampling factor for antialiasing to 'n' ($supersample by default) -t turn transparency OFF -u url url to image files above (relative links are default) -v print verbose information Output files: *.html copy of input FILE(s), with .. tags substituted filename is same as input file, with the extension replaced eqn???.png equation images (png extension is example only, see -f option) Input files may not have .html extension, .htex is required. "; $| = 1; # flush output after every print, causes better feedback with -v flag my $img_name = "eqn000"; # --- sub: rel_name --- # usage: rel_name $src, $dest; # $src and $dest should be absolute paths # returns: relative path to $dest, as seen from $src sub rel_name { my @src = split /\//, shift; my @dest = split /\//, shift; my $path; my $i = 0; # let $i = first level where $src and $dest doesn't match for ( $i = 0 ; $i <= $#src and $i <= $#dest and $src[$i] eq $dest[$i] ; $i++ ) { } $path = "../" x ( $#src - $i + 1 ); for ( ; exists $dest[$i] ; $i++ ) { $path .= "$dest[$i]/"; } return $path; } # --- sub: full_name --- # usage: full_name $src, $dest # $src should be some absolute path # $dest may be relative (as seen from $src) or absolute # returns absolute path to $dest, as seen from $src (without trailing /) sub full_name { my $src = shift; my $dest = shift; # add trailing / if not present $dest .= "/" unless $dest =~ /\/$/; # if not absolute path, add $src $dest = $src . "/$dest" unless $dest =~ /^\//; # remove ./ $dest =~ s/\.\///g; # remove // while ( $dest =~ s{//}{/}g ) { } # remove ../ while ( $dest =~ s{/([^/]*/)\.\./}{$1}g ) { } # remove trailing / $dest =~ s/\/$//; return $dest; } # --- Parse command line options --- our %options = (); getopts( 'f:r:s:d:u:vtc:b:p:e:l:i:a', \%options ); if ( $#ARGV < 0 ) { print $usage; print `eqn2img -f?`; # this prints list of supported formats exit; } $img_dir = $options{d} if $options{d}; $dpi = $options{r} if $options{r}; $supersample = $options{s} if $options{s}; $format = $options{f} if $options{f}; $verbose = $options{v} if $options{v}; $transparency = 0 if $options{t}; $preamble .= "$options{p}\n" if $options{p}; $foreground = $options{c} if $options{c}; $background = $options{b} if $options{b}; $environment = $options{e} if $options{e}; $blockMathClass = $options{l} if $options{l}; $inlineMathClass = $options{i} if $options{i}; our $url; our %history; if ( $options{u} ) { $url = $options{u}; $url .= "/" unless $url =~ /\/$/; if ( !$options{d} ) { print "\nWarning: -u option present, but no -d\n\n"; } } $options{t} = 0; # just do something with $options{t} to avoid 'possible typo' warning # todo: add validation of options if ( $options{d} and !defined $url ) { $img_dir_relative = $img_dir; $img_dir = full_name( getcwd(), $img_dir ); if ( !-d $img_dir ) { unless ( mkdir $img_dir ) { die "Unable to create $img_dir.\n"; } } } # read in cached history if ( $options{d} and -r "$img_dir/gladtex.cache" ) { print "Retrieving cache\n" if $verbose; eval '%history = %{ retrieve("$img_dir/gladtex.cache") };'; if($@) { # if it exists, but was not readable, just remove it and start from the # beginning print "Old GladTeX cache was not readable, removed; also removing all equations.\n"; opendir(DIR, "$img_dir") || die "Can't open directory: $!\n"; while( my $fn = readdir(DIR) ) { if( $fn =~ /^eqn/ ) { print "Remove " . File::Spec->catdir( $img_dir, $fn) . "\n" if $verbose; eval 'unlink( File::Spec->catdir( $img_dir, $fn ) )'; warn $@ if $@; } } unlink( "$img_dir/gladtex.cache" ); %history = (); } } # empty desc.html, if used: if($options{a}) { open( DESCFILE, ">", File::Spec->catdir( $img_dir, 'desc.html' ) ); print DESCFILE "\n"; close( DESCFILE ); } my $desc_file_used = 0; # --- Process input files --- print "Processing ", $#ARGV + 1, " files\n" if $verbose; our $startup_cwd = getcwd(); # all variables which are used in the following big loop construction; those # were not declared in an older version of the script, but they need to for "use # strict" our ( $file, $directory, $basename, $full_dir ); my ( $extension, $eqn2img_opt ); my ( $img_src, $dimensions ); my $pid; my $id_number=0; # replace those $this_* through the correct variables later our $this_preamble = $preamble; our $this_foreground = $foreground; our $this_background = $background; our $this_environment = $environment; our $this_dpi = $dpi; our $this_css_class = $inlineMathClass; foreach $file (@ARGV) { ( $directory, $basename, $extension ) = $file =~ /(.*?)\/*([^\/]*?)\.([^\/]*)$/; $directory or $directory = "."; $basename or $basename = "noname"; $extension or $extension = "htex"; $extension eq "html" and die "Don't use .html extension, .htex is required."; $full_dir = full_name( $startup_cwd, $directory ); if ( getcwd() ne $full_dir ) { if ( !$options{d} and %history ) { print "Storing cache\n" if $verbose; store( \%history, "gladtex.cache" ); undef %history; } chdir $full_dir; $img_name = "eqn000" if !$options{d}; } if ( !$options{d} and !%history ) { if ( -r "gladtex.cache" ) { print "Retrieving cache\n" if $verbose; %history = %{ retrieve("gladtex.cache") }; } } open( INPUT, "$basename.$extension" ) or die "Cannot open $file"; open( OUTPUT, ">$basename.html" ) or die "Cannot open $basename.html"; print "\n$file -> $basename.html\n" if $verbose; my ($start_line, $end_line) = 0; our $line = ""; while(not eof INPUT) { $line = ; $start_line++; $end_line = $start_line; # search for tag (the s option is needed to avoid loosing linebreak at end of line) while ( $line =~ /(.*?)(.*)/is ) { my $equation = ""; my $alt_equation; my $alt_long_equation=""; my $append_space = 0; print OUTPUT $1; # everything before tag my $options = $2; # anything between '' $line = $3; # the rest # scan options within tag my $key; while ( $options =~ /\s*?(\S*?)=\s*(\"(.*?)\"|\'(.*?)\'|(\S*))/g ) { # should whitespace be allowed around equal sign? $key = $1; # only one of these will be defined my $value; $value = $3 if defined $3; # "value" $value = $4 if defined $4; # 'value' $value = $5 if defined $5; # value (no quotation marks) # is there a better way to scan for key/value pairs? foreach ($key) { # may add more options here when needed.. /^preamble/i and $this_preamble .= "$value\n"; /^color/i and $this_foreground = $value; /^bgcolor/i and $this_background = $value; /^env/i and $this_environment = $value; /^dpi/i and $this_dpi = $value; } } if ( $this_environment eq "displaymath" ) { $this_css_class = $blockMathClass; } elsif ( $this_environment eq "math" ) { $this_css_class = $inlineMathClass; } # read equation until is found my $before; my $after; while ( not( ( $before, $after ) = ( $line =~ /(.*?)<\/eq>(.*?)$/is ) ) ) { $equation .= "$line"; if ( eof INPUT ) { print STDERR "Closing tag not found in equation started at line $start_line\n"; # todo: cleanup exit 1; } $line = ; $end_line++; } $equation .= $before; # everything before if($after eq "") { $append_space = 1; } $line = $after; # save equation for later use in alt tag / outsourced description $alt_equation = $equation; # replace " in alt tag: $alt_equation =~ s/"/"/g; if ( length($alt_equation) > 80 and $options{a}) { $alt_equation = substr( $alt_equation, 0, 76 ) . " ..."; $alt_long_equation = $equation; $id_number++; } # strip whitespace: this makes 'history' stronger and removes linebreak # trouble (a paragraph can't end within $$..$$ in latex) $equation =~ s/\s+/ /g; # Resolve entities in the equation, since the document # ought to be well-formed HTML. $equation =~ s/>/>/g; $equation =~ s/</{"opt"} eq $eqn2img_opt ) { print "Reusing image\n" if $verbose; } else { while ( -e "$img_dir/$img_name.$format" ) { $img_name++ }; # never overwrite an image print "$img_dir/$img_name: " if $verbose; $pid = open2( \*eqn2img_out, \*eqn2img_in, "eqn2img $eqn2img_opt -o '$img_dir/$img_name.$format'" ); print eqn2img_in $equation; close eqn2img_in; $dimensions = ; waitpid $pid, 0; # close seems not to set $? when using open2, why is that? if ($?) { print STDERR "Error processing equation starting at line $start_line:\n", $equation, "\n"; print STDERR "See ${img_dir}/${img_name}.log for details\n"; exit 1; } close eqn2img_out; print ", done.\n" if $verbose; $history{$equation}->{"opt"} = $eqn2img_opt; $history{$equation}->{"img"} = "$img_name.$format"; $history{$equation}->{"dim"} = $dimensions; } # if $alt_long_equation is != 0, wrap img in a link if($alt_long_equation ne "" and $options{a}) { print OUTPUT "catdir( $img_dir_relative, 'desc.html' ) . "#" . $id_number . "\">"; } print OUTPUT " {"img"} . "\" " . $history{$equation}->{"dim"} . " alt=\"" . $alt_equation . "\" />"; if($append_space) { print OUTPUT " "; } # add if($alt_long_equation ne "" and $options{a}) { print OUTPUT "\n"; } # write alt_long_equation out, if appropriate if ( $alt_long_equation ne "" ) { if ( $options{a} ) { $desc_file_used = 1; open( DESCFILE, ">>", File::Spec->catdir( $img_dir, 'desc.html' ) ); print DESCFILE "

$alt_long_equation

\n"; close(DESCFILE); } } } print OUTPUT "$line"; $start_line = $end_line; } } close(INPUT); close(OUTPUT); sub Shutdown { ### write out data ## write out HTML ending for desc.html if($options{a}) { if($desc_file_used) { open( DESCFILE, ">>", File::Spec->catdir( $img_dir, 'desc.html' ) ); print DESCFILE "\n"; close(DESCFILE); } } ## write out cache, if apppropriate # write history cache if(%history) { print "Storing cache\n" if $verbose; store( \%history, File::Spec->catdir( $img_dir, "gladtex.cache") ); } ## remove desc.html, if empty if(!$desc_file_used) { unlink(File::Spec->catdir( $img_dir, 'desc.html' )); } # if no gladtex cache was written, no equations and no desc.html, the # img_dir will be empty, remove it my $i=0; opendir(DIR, "$img_dir") or die "Cant open $img_dir: $!\n"; my @files = readdir(DIR); foreach $file(@files) { unless ($file =~ /^[.][.]?\z/) { $i++; } } if ($i == 0) { rmdir($img_dir); } closedir(DIR); } Shutdown(); gladtex-1.4.2/gladtex.pod000066400000000000000000000172451235230725300153150ustar00rootroot00000000000000 =pod =head1 NAME gladtex - generate html with LaTeX equations embedded as images =head1 SYNOPSIS gladtex [options] [ ...] =head1 DESCRIPTION Reads a 'htex' file (html with LaTeX maths embedded in EEQEE/EQE) and produces html with equations substituted by images. =head1 QUICK START Write HTML code as usual, but use LaTeX equations within the tags EEQE..E/EQE. Don't use .html extension, .htex is recommended. Now, run: gladtex -v myfile.htex Or, to process multiple files: gladtex -v *htex The -v option is not mandatory, but gives you more feedback. If there are no LaTeX errors, this will generate the file myfile.html (or similar) and numerous eqn???.png files, which contain images of your equations. The HTML file generated is a copy of yours, but the equations are substituted by links to the image files. If you prefer gif files, add the option "-f gif". gladTeX tries to avoid regenerating identical image files. To achieve this, a cache file (gladtex.cache) is used, containing the equations used for generating each image. If you delete the image files before rerunning gladTeX, you should also delete the cache file (gladTeX never deletes an image file). If your HTML contains more than a couple of equations, it is a good idea to place equation images in a separate directory with the -d option. With this option turned on, the cache file is also moved to that directory. =head1 OPTIONS You can optain the command-line help using gladTeX without options. =over =item B<-a> Save text alternatives for images which are too long for the alt attribute into a single separate file and link images to it. In -attributes, you can only have up to 255 characters. Since equations with line breaks / long equations don't fit in there, this switch allows outsourcing in a file called desc.html in the directory specified with -d or the current directory by default. =item B<-b> I Set background colour in RGB manner. This option can also be set indivdually for each equation by writing EEQ BGCOLOR="..."E in the htex file. For PNG format with transparency on, this option has no effect. For GIF format (which does not support alpha channel, as far as I know), antialiasing is done from the foreground color (-c option) to the background colour, so the background colour should be set even with transparency on. =item B<-c> I Set foreground colour in RGB manner. For instance "-c 00FFFF" gives yellow text. This option can also be set indivdually for each equation by writing EEQ COLOR="..."E in the htex file. See also -b option. =item B<-d> I Store image files in the path given. The image links in the generated html file(s) will be made relative. If you need absolute links, use the -u option in addition. =item B<-e> I Use the specified LaTeX environment instead of "displaymath" when generating the image. This option can also be set individually for each equation by writing EEQ ENV="env"E. =item B<-f> I Use the specified image format in output files. Formats supported may depend on compile-time decisions. At the time of writing, png and gif are the ones supported. =item B<-i> I Assign the specified CSS class name to images whose environment is "math". Defaults to "inlinemath". =item B<-l> I Assign the specified CSS class name to images whose environment is "displaymath". Defaults to "displaymath". =item B<-p> I Add this string to the LaTeX preamble when generating the equations. For example, "string" may be a \usepackage{} command. Note that if you need this for only a few equations, you can also write EEQ PREAMBLE="..."E in the htex file. =item B<-r> I Set resolution of output images, larger numbers produce larger images. 100 dpi is default. This is most often a bit larger than surrounding text, but as LaTeX output is really intended for hires output, details will often disappear at lower resolutions. Do some experimenting. This option can also be set indivdually for each equation by writing EEQ DPI="..."E in the htex file. =item B<-s> I Set oversampling factor. Larger values will increase antialiasing verbosity, but is slower. The default is 4. A value of 1 turns off antialiasing, which I don't recommend. =item B<-t> Disable transparent background. With this option, the background colour (-b option) is solid. =item B<-u> I Set absolute url to the image files folder. Use this together with -d option if you can't use relative links for some reason. =item B<-v> Verbose mode, give extra feedback. Gladtex is pretty silent without. =back =head1 eqn2img UTILITY The gladTeX script just parses your html-code and feeds the equations to the C program eqn2img. This takes care of running LaTeX, dvi2ps and ghostscript. Furthermore, it finds the baseline of the equation (guided by a dot that is inserted into the equation), antialiases and writes the image in the final format. All this is independent from the gladTeX script, for instance you may write echo '\sqrt{2}' | eqn2img > sqrt.png to produce an image of the squareroot of two. For normal operation of gladTeX, you never use this utility directly, but in any case, here are (some of) the options. =over =item B<-f> I Use the specified image format in output files. If "format" is just a question sign "?", eqn2img will print a list of supported formats and quit. =item B<-s> I Set oversampling factor (see description of same option for gladTeX). =item B<-o> I Set output filename. Without this option, the image is written to stdout. =item B<-c> I Set foreground colour in RGB manner. =item B<-b> I Set background colour in RGB manner. =item B<-t> Turn transparency off. =item B<-v> Verbose mode, give some feedback. =back All messages are written to stderr. Furthermore, a text string specifying the dimensions is written to stdout, unless the image is being written to stdout. In this case, the dimension string is written to stderr. Note that eqn2img will only process one file at a time. =head1 PARSING DETAILS Gladtex is not case sensitive, so EeQE is allright. Any EeqE tag must be closed by a E/eqE. Whitespace between "Eeq" and "E" is allowed. Certain options (such as "COLOR=...") may be present in the tag, see the Options section above. Whitespace is not allowed anywhere else, so "E eqE", "E /eqE" and "E/eq E" are all illegal. I'm not quite sure how this agrees with html standards/conventions. =head1 THANKS I am grateful to all users who have provided feedback. The current version of gladTeX incorporates suggestions from a number of helpful users. =head1 COPYRIGHT Project homepage at http://gladtex.sourceforge.net Copyright (C) 1999-2010 Martin G. Gulbrandsen This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA gladtex-1.4.2/todo000066400000000000000000000003611235230725300140400ustar00rootroot00000000000000To Do's ======= * eqn2img: no dvips/ghostscript-dependency * allow configurable regular expressions for excluding certain kinds of LaTeX equations automatically * consider e.g. \begin{cases} ... \end{cases} (not readable in one line)