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/src/FreeImage/Source/LibMNG/README.config

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  1Configuration options in libmng
  2===============================
  3
  4The library is fairly configurable through the use of a number of defines.
  5Please note however that certain defines are for internal use only.
  6The following list gives a summary of options that can be used externally to
  7define the functionality of the library:
  8
  9========================================
 10
 11#define MNG_BUILD_DLL
 12
 13This is used to indicate that a "standard" DLL should result from compiling
 14the library. Please note the remarks in README.dll if you intend to work
 15with the library as a DLL. The purpose of this option is to ensure that
 16DLL builds have the same set of functions.
 17
 18#define MNG_BUILD_SO
 19
 20This is used to indicate that a "standard" shared library (SO) should result
 21from a compilation. The purpose of this option is to ensure that all
 22shared libraries generated this way will have the same set of functions.
 23
 24#define MNG_USE_DLL / #define MNG_USE_SO
 25
 26These should be used when including the library header in the compilation
 27of an application to indicate that the compiler/linker must take the
 28necessary steps to make the binary executable to use the standard DLL
 29or shared library (SO).
 30
 31#define MNG_SKIP_ZLIB / #define MNG_SKIP_LCMS / #define MNG_SKIP_IJG6B
 32
 33Use these in conjunction with MNG_USE_DLL / MNG_USE_SO. This is useful if
 34you only need the external definitions of the MNG library and not the others,
 35which will speed up the compilation process.
 36
 37#define MNG_SUPPORT_FULL / #define MNG_SUPPORT_LC / #define MNG_SUPPORT_VLC
 38
 39These can be used to indicate the level of MNG spec compliance required.
 40Currently only full MNG compliance is supported.
 41
 42#define MNG_SUPPORT_IJG6B
 43
 44This can be used to indicate if JNG support is required. This option will
 45include the IJG JPEG-library. Note that MNG_SUPPORT_FULL will automatically
 46set this option. Use this only if you need JNG support with MNG-(V)LC.
 47
 48#define MNG_FULL_CMS / #define MNG_GAMMA_ONLY / #define MNG_NO_CMS /
 49#define MNG_APP_CMS
 50
 51These indicate the color-correction support level of the library.
 52If you are on a platform that supports lcms (Little CMS by Marti Maria Saguar)
 53then it is highly recommended to define MNG_FULL_CMS.
 54If your platform has it's own CMS then select MNG_APP_CMS and be sure to
 55include the appropriate callbacks in your app.
 56In all other cases it is recommended to define MNG_GAMMA_ONLY.
 57
 58#define MNG_SUPPORT_READ / #define MNG_SUPPORT_WRITE /
 59#define MNG_SUPPORT_DISPLAY
 60
 61These indicate the high-level support for reading, writing and/or
 62displaying files. Note that in order to display a file, you'll need to read
 63it first. (yes, really!)
 64
 65#define MNG_STORE_CHUNKS
 66
 67This indicates that the library should store chunk-information when reading
 68a file. This information can then be processed through the
 69MNG_ITERATE_CHUNKS() function. Note that you must specify this option if
 70you want to create and write a new file.
 71
 72#define MNG_ACCESS_CHUNKS
 73
 74This is used to indicate that the app may need access to internally stored
 75chunk information. MNG_STORE_CHUNKS must be defined as well for this option
 76to function properly.
 77
 78#define MNG_INTERNAL_MEMMNGMT
 79
 80You can use this to have the library handle it's own memory allocation and
 81deallocation through the "standard" memory functions. This option is turned
 82off by default, which means your app must define the memory callbacks.
 83
 84#define MNG_ERROR_TELLTALE
 85
 86Set this on to allow human-readable error-messages to be included in the
 87library and the error function and callback.
 88
 89#define MNG_BIGENDIAN_SUPPORTED
 90
 91This option should be used to indicate the hardware is based on big endian
 92integers.
 93
 94#define MNG_SUPPORT_TRACE / #define MNG_TRACE_TELLTALE
 95
 96These two can be used when debugging an app. You'll need to have the trace
 97callback setup also. This allows for a rather thorough investigation of the
 98libraries function paths.
 99
100========================================
101
102Any other optional defines you may encounter are for internal use only.
103please do not specify them externally. In case of doubt, consult the
104support email lists. More info can be found on http://www.libmng.com