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    think hard about the following routines.

    lcms requires 2 profiles to work off the differences in the input-image
    and the output-device. The ICC profile for the input-image will be
    embedded within it to reflect its color-characteristics, but the output
    profile depends on the output-device, which is something only *YOU* know
    about. sRGB (standard RGB) is common for x86 compatible environments
    (eg. Windows, Linux and some others)

    If you are compiling for a sRGB compliant system you probably won't have
    to do anything special. (unless you want to ofcourse)

    If you are compiling for a non-sRGB compliant system
    (eg. SGI, Mac, Next, others...)
    you *MUST* define a proper ICC profile for the generic output-device
    associated with that platform.

    In either event, you may also want to offer an option to your users to
    set the profile manually, or, if you know how, set it from a
    system-defined default.

    TO RECAP: for sRGB systems (Windows, Linux) no action required!
              for non-sRGB systems (SGI, Mac, Next) ACTION REQUIRED!

    Please visit http://www.srgb.com, http://www.color.org and
    http://www.littlecms.com for more info.

    *************************************************************************
                  !!!!!!!! THIS BIT IS IMPORTANT !!!!!!!!!
    *************************************************************************
*/
/* mng_set_srgb tells libmng if it's running on a sRGB compliant system or not
   the default is already set to MNG_TRUE */
/* mng_set_outputprofile, mng_set_outputprofile2, mng_set_outputsrgb
   are used to set the default profile describing the output-device
   by default it is already initialized with an sRGB profile */
/* mng_set_srgbprofile, mng_set_srgbprofile2, mng_set_srgbimplicit
   are used to set the default profile describing a standard sRGB device
   this is used when the input-image is tagged only as being sRGB, but the
   output-device is defined as not being sRGB compliant
   by default it is already initialized with a standard sRGB profile */
#if defined(MNG_SUPPORT_DISPLAY)
MNG_EXT mng_retcode MNG_DECL mng_set_srgb            (mng_handle        hHandle,
                                                      mng_bool          bIssRGB);
MNG_EXT mng_retcode MNG_DECL mng_set_outputprofile   (mng_handle        hHandle,
                                                      mng_pchar         zFilename);
MNG_EXT mng_retcode MNG_DECL mng_set_outputprofile2  (mng_handle        hHandle,
                                                      mng_uint32        iProfilesize,
                                                      mng_ptr           pProfile);
MNG_EXT mng_retcode MNG_DECL mng_set_outputsrgb      (mng_handle        hHandle);
MNG_EXT mng_retcode MNG_DECL mng_set_srgbprofile     (mng_handle        hHandle,
                                                      mng_pchar         zFilename);
MNG_EXT mng_retcode MNG_DECL mng_set_srgbprofile2    (mng_handle        hHandle,
                                                      mng_uint32        iProfilesize,
                                                      mng_ptr           pProfile);
MNG_EXT mng_retcode MNG_DECL mng_set_srgbimplicit    (mng_handle        hHandle);
#endif

/* Gamma settings */
/* only used if you #define MNG_FULL_CMS or #define MNG_GAMMA_ONLY */
/* ... blabla (explain gamma processing a little; eg. formula & stuff) ... */
MNG_EXT mng_retcode MNG_DECL mng_set_viewgamma       (mng_handle        hHandle,
                                                      mng_float         dGamma);
MNG_EXT mng_retcode MNG_DECL mng_set_displaygamma    (mng_handle        hHandle,
                                                      mng_float         dGamma);
MNG_EXT mng_retcode MNG_DECL mng_set_dfltimggamma    (mng_handle        hHandle,
                                                      mng_float         dGamma);
MNG_EXT mng_retcode MNG_DECL mng_set_viewgammaint    (mng_handle        hHandle,
                                                      mng_uint32        iGamma);
MNG_EXT mng_retcode MNG_DECL mng_set_displaygammaint (mng_handle        hHandle,
                                                      mng_uint32        iGamma);
MNG_EXT mng_retcode MNG_DECL mng_set_dfltimggammaint (mng_handle        hHandle,
                                                      mng_uint32        iGamma);

/* Ultimate clipping size */
/* used to limit extreme graphics from overloading the system */
/* if a graphic exceeds these limits a warning is issued, which can
   be ignored by the app (using the errorproc callback). in that case
   the library will use these settings to clip the input graphic, and
   the app's canvas must account for this */
MNG_EXT mng_retcode MNG_DECL mng_set_maxcanvaswidth  (mng_handle        hHandle,
                                                      mng_uint32        iMaxwidth);
MNG_EXT mng_retcode MNG_DECL mng_set_maxcanvasheight (mng_handle        hHandle,
                                                      mng_uint32        iMaxheight);
MNG_EXT mng_retcode MNG_DECL mng_set_maxcanvassize   (mng_handle        hHandle,
                                                      mng_uint32        iMaxwidth,
                                                      mng_uint32        iMaxheight);

/* ZLIB default compression parameters */
/* these are used when writing out chunks */
/* they are also used when compressing PNG image-data or JNG alpha-data;
   in this case you can set them just before calling mng_putimgdata_ihdr */
/* set to your liking; usually the defaults will suffice though! */
/* check the documentation for ZLIB for details on these parameters */
#ifdef MNG_INCLUDE_ZLIB
MNG_EXT mng_retcode MNG_DECL mng_set_zlib_level      (mng_handle        hHandle,
                                                      mng_int32         iZlevel);
MNG_EXT mng_retcode MNG_DECL mng_set_zlib_method     (mng_handle        hHandle,
                                                      mng_int32         iZmethod);
MNG_EXT mng_retcode MNG_DECL mng_set_zlib_windowbits (mng_handle        hHandle,
                                                      mng_int32         iZwindowbits);
MNG_EXT mng_retcode MNG_DECL mng_set_zlib_memlevel   (mng_handle        hHandle,
                                                      mng_int32         iZmemlevel);
MNG_EXT mng_retcode MNG_DECL mng_set_zlib_strategy   (mng_handle        hHandle,
                                                      mng_int32         iZstrategy);

MNG_EXT mng_retcode MNG_DECL mng_set_zlib_maxidat    (mng_handle        hHandle,
                                                      mng_uint32        iMaxIDAT);
#endif /* MNG_INCLUDE_ZLIB */

/* JNG default compression parameters (based on IJG code) */
/* these are used when compressing JNG image-data; so you can set them
   just before calling mng_putimgdata_jhdr */
/* set to your liking; usually the defaults will suffice though! */
/* check the documentation for IJGSRC6B for details on these parameters */
#ifdef MNG_INCLUDE_JNG
#ifdef MNG_INCLUDE_IJG6B
MNG_EXT mng_retcode MNG_DECL mng_set_jpeg_dctmethod  (mng_handle        hHandle,
                                                      mngjpeg_dctmethod eJPEGdctmethod);
#endif
MNG_EXT mng_retcode MNG_DECL mng_set_jpeg_quality    (mng_handle        hHandle,