kc3-lang/libjpeg-turbo/src/jconfig.txt

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• Hash : e69dd40c
  Author :
  Date : 2024-01-23T13:26:41
  

  Reorganize source to make things easier to find
  
  - Move all libjpeg documentation, except for README.ijg, into the doc/
    subdirectory.
  
  - Move the TurboJPEG C API documentation from doc/html/ into
    doc/turbojpeg/.
  
  - Move all C source code and headers into a src/ subdirectory.
  
  - Move turbojpeg-jni.c into the java/ subdirectory.
  
  Referring to #226, there is no ideal solution to this problem.  A
  semantically ideal solution would have involved placing all source code,
  including the SIMD and Java source code, under src/ (or perhaps placing
  C library source code under lib/ and C test program source code under
  test/), all header files under include/, and all documentation under
  doc/.  However:
  
  - To me it makes more sense to have separate top-level directories for
    each language, since the SIMD extensions and the Java API are
    technically optional features.  src/ now contains only the code that
    is relevant to the core C API libraries and associated programs.
  - I didn't want to bury the java/ and simd/ directories or add a level
    of depth to them, since both directories already contain source code
    that is 3-4 levels deep.
  - I would prefer not to separate the header files from the C source
    code, because:
    1. It would be disruptive.  libjpeg and libjpeg-turbo have
       historically placed C source code and headers in the same
       directory, and people who are familiar with both projects (self
       included) are used to looking for the headers in the same directory
       as the C source code.
    2. In terms of how the headers are used internally in libjpeg-turbo,
       the distinction between public and private headers is a bit fuzzy.
  - It didn't make sense to separate the test source code from the library
    source code, since there is not a clear distinction in some cases.
    (For instance, the IJG image I/O functions are used by cjpeg and djpeg
    as well as by the TurboJPEG API.)
  
  This solution is minimally disruptive, since it keeps all C source code
  and headers together and keeps java/ and simd/ as top-level directories.
  It is a bit awkward, because java/ and simd/ technically contain source
  code, even though they are not under src/.  However, other solutions
  would have been more awkward for different reasons.
  
  Closes #226
  

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• src/jconfig.txt

• /*
   * jconfig.txt
   *
   * This file was part of the Independent JPEG Group's software:
   * Copyright (C) 1991-1994, Thomas G. Lane.
   * It was modified by The libjpeg-turbo Project to include only code relevant
   * to libjpeg-turbo.
   * For conditions of distribution and use, see the accompanying README.ijg
   * file.
   *
   * This file documents the configuration options that are required to
   * customize the JPEG software for a particular system.
   *
   * The actual configuration options for a particular installation are stored
   * in jconfig.h.  On many machines, jconfig.h can be generated automatically
   * or copied from one of the "canned" jconfig files that we supply.  But if
   * you need to generate a jconfig.h file by hand, this file tells you how.
   *
   * DO NOT EDIT THIS FILE --- IT WON'T ACCOMPLISH ANYTHING.
   * EDIT A COPY NAMED JCONFIG.H.
   */
  
  
  /*
   * These symbols indicate the properties of your machine or compiler.
   * #define the symbol if yes, #undef it if no.
   */
  
  /* Define "boolean" as unsigned char, not int, on Windows systems.
   */
  #ifdef _WIN32
  #ifndef __RPCNDR_H__            /* don't conflict if rpcndr.h already read */
  typedef unsigned char boolean;
  #endif
  #define HAVE_BOOLEAN            /* prevent jmorecfg.h from redefining it */
  #endif
  
  
  /*
   * The following options affect code selection within the JPEG library,
   * but they don't need to be visible to applications using the library.
   * To minimize application namespace pollution, the symbols won't be
   * defined unless JPEG_INTERNALS has been defined.
   */
  
  #ifdef JPEG_INTERNALS
  
  /* Define this if your compiler implements ">>" on signed values as a logical
   * (unsigned) shift; leave it undefined if ">>" is a signed (arithmetic) shift,
   * which is the normal and rational definition.
   */
  #undef RIGHT_SHIFT_IS_UNSIGNED
  
  
  #endif /* JPEG_INTERNALS */
  
  
  /*
   * The remaining options do not affect the JPEG library proper,
   * but only the sample applications cjpeg/djpeg (see cjpeg.c, djpeg.c).
   * Other applications can ignore these.
   */
  
  #ifdef JPEG_CJPEG_DJPEG
  
  /* These defines indicate which image (non-JPEG) file formats are allowed. */
  
  #define BMP_SUPPORTED           /* BMP image file format */
  #define GIF_SUPPORTED           /* GIF image file format */
  #define PPM_SUPPORTED           /* PBMPLUS PPM/PGM image file format */
  #define TARGA_SUPPORTED         /* Targa image file format */
  
  /* Define this if you want to name both input and output files on the command
   * line, rather than using stdout and optionally stdin.  You MUST do this if
   * your system can't cope with binary I/O to stdin/stdout.  See comments at
   * head of cjpeg.c or djpeg.c.
   */
  #undef TWO_FILE_COMMANDLINE
  
  /* By default, we open image files with fopen(..., "rb") or fopen(..., "wb").
   * This is necessary on systems that distinguish text files from binary files,
   * and is harmless on most systems that don't.  If you have one of the rare
   * systems that complains about the "b" spec, define this symbol.
   */
  #undef DONT_USE_B_MODE
  
  /* Define this if you want percent-done progress reports from cjpeg/djpeg.
   */
  #undef PROGRESS_REPORT
  
  
  #endif /* JPEG_CJPEG_DJPEG */
  

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