/*
 * MSCMS - Color Management System for Wine
 *
 * Copyright 2004 Hans Leidekker
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "config.h"

#include "wine/port.h"
#include "wine/debug.h"
#include "wine/library.h"

#include <stdarg.h>

#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "icm.h"

#define LCMS_API_NO_REDEFINE
#define LCMS_API_FUNCTION(f) typeof(f) * p##f;
#include "lcms_api.h"
#undef LCMS_API_FUNCTION

WINE_DEFAULT_DEBUG_CHANNEL(mscms);

#ifdef HAVE_LCMS_H
#ifndef SONAME_LIBLCMS
#define SONAME_LIBLCMS "liblcms.so"
#endif

static void *lcmshandle = NULL;
#endif /* HAVE_LCMS_H */

static BOOL MSCMS_init_lcms()
{
#ifdef HAVE_LCMS_H
    /* dynamically load lcms if not yet loaded */
    if (!lcmshandle)
    {
        lcmshandle = wine_dlopen( SONAME_LIBLCMS, RTLD_NOW, NULL, 0 );

        /* We can't really do anything useful without liblcms */
        if (!lcmshandle)
        {
            WINE_MESSAGE(
            "Wine cannot find the LittleCMS library. To enable Wine to use color\n"
            "management functions please install a version of LittleCMS greater\n"
            "than or equal to 1.13.\n"
            "http://www.littlecms.com\n" );

            return FALSE;
        }
    }

    #define LOAD_FUNCPTR(f) \
            if ((p##f = wine_dlsym( lcmshandle, #f, NULL, 0 )) == NULL) \
                goto sym_not_found;

    LOAD_FUNCPTR(cmsCloseProfile);
    LOAD_FUNCPTR(cmsIsTag);
    LOAD_FUNCPTR(cmsOpenProfileFromFile);
    LOAD_FUNCPTR(cmsOpenProfileFromMem);
    #undef LOAD_FUNCPTR

return TRUE;

sym_not_found:
    WINE_MESSAGE(
      "Wine cannot find certain functions that it needs inside the LittleCMS\n"
      "library. To enable Wine to use LittleCMS for color management please\n"
      "upgrade liblcms to at least version 1.13.\n"
      "http://www.littlecms.com\n" );

    wine_dlclose( lcmshandle, NULL, 0 );
    lcmshandle = NULL;

    return FALSE;

#endif /* HAVE_LCMS_H */
    WINE_MESSAGE(
      "This version of Wine was compiled without support for color management\n"
      "functions. This means many color functions are empty stubs and you should\n"
      "expect your application to fail. To enable Wine to use LittleCMS for color\n"
      "management please install a liblcms development package version 1.13 or\n"
      "higher and rebuild Wine.\n"
      "http://www.littlecms.com\n" );

    return TRUE;
}

static void MSCMS_deinit_lcms()
{
#ifdef HAVE_LCMS_H
    if (lcmshandle)
    {
        wine_dlclose( lcmshandle, NULL, 0 );
        lcmshandle = NULL;
    }
#endif /* HAVE_LCMS_H */
}

BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, LPVOID reserved )
{
    TRACE( "(%p, 0x%08lx, %p)\n", hinst, reason, reserved );

    switch (reason)
    {
    case DLL_PROCESS_ATTACH:
        return MSCMS_init_lcms();

    case DLL_PROCESS_DETACH:
        MSCMS_deinit_lcms();
        break;
    }

    return TRUE;
}