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Configuration options in libmng
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===============================
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The library is fairly configurable through the use of a number of defines.
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Please note however that certain defines are for internal use only.
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The following list gives a summary of options that can be used externally to
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define the functionality of the library:
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========================================
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This is used to indicate that a "standard" DLL should result from compiling
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the library. Please note the remarks in README.dll if you intend to work
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with the library as a DLL. The purpose of this option is to ensure that
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DLL builds have the same set of functions.
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This is used to indicate that a "standard" shared library (SO) should result
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from a compilation. The purpose of this option is to ensure that all
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shared libraries generated this way will have the same set of functions.
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#define MNG_USE_DLL / #define MNG_USE_SO
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These should be used when including the library header in the compilation
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of an application to indicate that the compiler/linker must take the
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necessary steps to make the binary executable to use the standard DLL
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or shared library (SO).
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#define MNG_SKIP_ZLIB / #define MNG_SKIP_LCMS / #define MNG_SKIP_IJG6B
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Use these in conjunction with MNG_USE_DLL / MNG_USE_SO. This is useful if
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you only need the external definitions of the MNG library and not the others,
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which will speed up the compilation process.
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#define MNG_SUPPORT_FULL / #define MNG_SUPPORT_LC / #define MNG_SUPPORT_VLC
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These can be used to indicate the level of MNG spec compliance required.
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Currently only full MNG compliance is supported.
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#define MNG_SUPPORT_IJG6B
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This can be used to indicate if JNG support is required. This option will
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include the IJG JPEG-library. Note that MNG_SUPPORT_FULL will automatically
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set this option. Use this only if you need JNG support with MNG-(V)LC.
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#define MNG_FULL_CMS / #define MNG_GAMMA_ONLY / #define MNG_NO_CMS /
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These indicate the color-correction support level of the library.
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If you are on a platform that supports lcms (Little CMS by Marti Maria Saguar)
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then it is highly recommended to define MNG_FULL_CMS.
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If your platform has it's own CMS then select MNG_APP_CMS and be sure to
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include the appropriate callbacks in your app.
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In all other cases it is recommended to define MNG_GAMMA_ONLY.
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#define MNG_SUPPORT_READ / #define MNG_SUPPORT_WRITE /
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#define MNG_SUPPORT_DISPLAY
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These indicate the high-level support for reading, writing and/or
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displaying files. Note that in order to display a file, you'll need to read
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it first. (yes, really!)
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#define MNG_STORE_CHUNKS
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This indicates that the library should store chunk-information when reading
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a file. This information can then be processed through the
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MNG_ITERATE_CHUNKS() function. Note that you must specify this option if
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you want to create and write a new file.
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#define MNG_ACCESS_CHUNKS
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This is used to indicate that the app may need access to internally stored
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chunk information. MNG_STORE_CHUNKS must be defined as well for this option
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#define MNG_INTERNAL_MEMMNGMT
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You can use this to have the library handle it's own memory allocation and
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deallocation through the "standard" memory functions. This option is turned
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off by default, which means your app must define the memory callbacks.
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#define MNG_ERROR_TELLTALE
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Set this on to allow human-readable error-messages to be included in the
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library and the error function and callback.
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#define MNG_BIGENDIAN_SUPPORTED
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This option should be used to indicate the hardware is based on big endian
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#define MNG_SUPPORT_TRACE / #define MNG_TRACE_TELLTALE
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These two can be used when debugging an app. You'll need to have the trace
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callback setup also. This allows for a rather thorough investigation of the
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libraries function paths.
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========================================
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Any other optional defines you may encounter are for internal use only.
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please do not specify them externally. In case of doubt, consult the
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support email lists. More info can be found on http://www.libmng.com
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FreeImage/Source/LibMNG/README.config
