DisplayModeInfo.c

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/****************************************************************************************/
/*  DisplayModeInfo.C                                                                   */
/*                                                                                      */
/*  Author:  Mike Sandige                                                               */
/*  Description:  This is a simple container to hold information about available display*/
/*                modes for the software driver.                                        */
/*                                                                                      */
/*  The contents of this file are subject to the Genesis3D Public License               */
/*  Version 1.01 (the "License"); you may not use this file except in                   */
/*  compliance with the License. You may obtain a copy of the License at                */
/*  http://www.genesis3d.com                                                            */
/*                                                                                      */
/*  Software distributed under the License is distributed on an "AS IS"                 */
/*  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See                */
/*  the License for the specific language governing rights and limitations              */
/*  under the License.                                                                  */
/*                                                                                      */
/*  The Original Code is Genesis3D, released March 25, 1999.                            */
/*Genesis3D Version 1.1 released November 15, 1999                            */
/*  Copyright (C) 1999 WildTangent, Inc. All Rights Reserved           */
/*                                                                                      */
/****************************************************************************************/
#include <stdlib.h>
#include <assert.h>
#include "DisplayModeInfo.h"

#ifdef GENESIS_VERSION_2
#include "errorlog.h"
#else
#define geErrorLog_AddString(Error,xx,yy) 
#endif


#define DISPLAYMODES_MAX 16

typedef struct DisplayModeInfo_Data
{
        int             Width;
        int             Height;
        int             BitsPerPixel;
        uint32  Flags;
}       DisplayModeInfo_Data;


typedef struct DisplayModeInfo
{
        DisplayModeInfo_Data     Mode[DISPLAYMODES_MAX];
        int                                              ModeCount;
}       DisplayModeInfo;


DisplayModeInfo *DisplayModeInfo_Create(void)
{
        DisplayModeInfo *Info;

        Info = malloc(sizeof(*Info));
        if (Info == NULL)
                {
                        geErrorLog_AddString(GE_ERR_MEMORY_RESOURCE,"DisplayModeInfo:  unable to get memory for object",NULL);
                        return NULL;
                }
        Info-> ModeCount = 0;
        return Info;
}

void DisplayModeInfo_Destroy(DisplayModeInfo **Info)
{
        assert ( Info != NULL );
        assert (*Info != NULL );
        free ( *Info );
        *Info = NULL;
}

int DisplayModeInfo_GetModeCount(DisplayModeInfo *Info)
{
        assert( Info != NULL );

        return Info->ModeCount;
}

geBoolean DisplayModeInfo_AddEntry(DisplayModeInfo *Info, 
                                int Width,
                                int Height,
                                int BitsPerPixel,
                                uint32 Flags)
{
        assert( Info != NULL );

        if (Info->ModeCount<DISPLAYMODES_MAX)
                {
                        Info->Mode[Info->ModeCount].Width        = Width;
                        Info->Mode[Info->ModeCount].Height       = Height;
                        Info->Mode[Info->ModeCount].BitsPerPixel = BitsPerPixel;
                        Info->Mode[Info->ModeCount].Flags        = Flags;
                        Info->ModeCount++;
                        return GE_TRUE;
                }
        else
                {
                        geErrorLog_AddString(GE_ERR_INTERNAL_RESOURCE,"GE_DisplayModeInfo_AddEntry:Too many modes",NULL);
                        return GE_FALSE;
                }
}

geBoolean DisplayModeInfo_GetNth(DisplayModeInfo *Info, int Nth,
                                int *Width, 
                                int *Height,
                                int *BitsPerPixel,
                                uint32 *Flags)
{
        assert( Info != NULL );
        assert( Width        != NULL );
        assert( Height       != NULL );
        assert( BitsPerPixel != NULL );
        assert( Flags        != NULL );
        if ((Nth < 0) || (Nth > Info->ModeCount))
                {
                        geErrorLog_AddString(GE_ERR_BAD_PARAMETER,"DisplayModeInfo_GetNth:  bad mode index",geErrorLog_IntToString(Nth));
                        return GE_FALSE;
                }

        *Width        = Info->Mode[Nth].Width;
        *Height       = Info->Mode[Nth].Height;
        *BitsPerPixel = Info->Mode[Nth].BitsPerPixel;
        *Flags        = Info->Mode[Nth].Flags;
        return GE_TRUE;
}

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