gal.c

在ｅｃｏｓ 下mingui 的移植开发

//
// $Id: gal.c,v 1.17 2000/11/26 07:18:59 ymwei Exp $
// 
// The Graphics Abstract Layer of MiniGUI.
//
// Copyright (C) 2000, Wei Yongming.
//
// Current maintainer: Wei Yongming.

/*
**  This library is free software; you can redistribute it and/or
**  modify it under the terms of the GNU Library General Public
**  License as published by the Free Software Foundation; either
**  version 2 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
**  Library General Public License for more details.
**
**  You should have received a copy of the GNU Library 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
*/

// Create date: 2000/06/11
//
// Modify records:
//
//  Who             When        Where       For What                Status
//-----------------------------------------------------------------------------
//
// TODO:
// 
// 

#include <stdio.h>
#include <string.h>
#ifdef _SVGALIB
    #include <vga.h>
    #include <vgagl.h>
    #ifdef _STDVGA
        #include <vgagl4.h>
    #endif
#endif
#ifdef _LIBGGI
    #include <ggi/ggi.h>
#endif
#include "common.h"
#include "minigui.h"
#include "gal.h"

#ifdef _S3C44B0X
    #include "s3c44b0x.h"
#endif

#ifdef _NATIVE_GAL_ENGINE
#include "native/native.h"
#endif

#ifdef _SVGALIB
    #include "svgalib.h"
#endif
#ifdef _LIBGGI
    #include "libggi.h"
#endif
#ifdef _EP7211
	#include "ep7211.h"
#endif
#ifdef _ADS
	#include "ads.h"
#endif

#ifndef lint
static char fileid[] = "$Id: gal.c,v 1.17 2000/11/26 07:18:59 ymwei Exp $";
#endif

#define LEN_ENGINE_NAME  8

GFX gfxes [] = 
{
#ifdef _SVGALIB
    {"SVGALib", InitSVGALib, TermSVGALib},
#endif
#ifdef _LIBGGI
    {"LibGGI", InitLibGGI, TermLibGGI},
#endif
#ifdef _EP7211
	{"EP7211",InitEP7211, TermEP7211},
#endif
#ifdef _ADS
	{"ADS", InitADS, TermADS},
#endif
#ifdef _NATIVE_GAL_ENGINE
    {"Native", InitNative, TermNative}
#endif
#ifdef _S3C44B0X
    {"s3c44b0x", Inits3c44b0x, Terms3c44b0x}
#endif
};

GFX* cur_gfx;

#define NR_GFXES  (sizeof (gfxes) / sizeof (GFX))

int InitGAL (void)
{
    int i;
    char buff [LEN_ENGINE_NAME + 1];

    if (GetValueFromEtcFile (ETCFILEPATH, "system", "gal_engine",
                                   buff, LEN_ENGINE_NAME) < 0 )
        return ERR_CONFIG_FILE;

    if (NR_GFXES == 0)
        return ERR_NO_ENGINE;

    for (i = 0; i < NR_GFXES; i++) {
        if ( strncasecmp (gfxes[i].id, buff, LEN_ENGINE_NAME) == 0) {
            cur_gfx = gfxes + i;
            break;
        }
    }
    
    if (cur_gfx == NULL) {
        fprintf (stderr, "GAL: Does not find matched engine.\n");
        return ERR_NO_MATCH;
    }

    if (!GAL_InitGfx (cur_gfx)) {
        fprintf (stderr, "GAL: Init GAL engine failure.\n");
        return ERR_GFX_ENGINE;
    }

    printf ("GAL: Use %s engine.\n", cur_gfx->id);

    return 0;
}

void TerminateGAL (void)
{
    GAL_TermGfx (cur_gfx);
}