source: downloads/ogre/RenderSystems/Direct3D9/src/OgreD3D9VideoModeList.cpp @ 48

/*
-----------------------------------------------------------------------------
This source file is part of OGRE
    (Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2006 Torus Knot Software Ltd
Also see acknowledgements in Readme.html

This program 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 of the License, or (at your option) any later
version.

This program 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 program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA, or go to
http://www.gnu.org/copyleft/lesser.txt.

You may alternatively use this source under the terms of a specific version of
the OGRE Unrestricted License provided you have obtained such a license from
Torus Knot Software Ltd.
-----------------------------------------------------------------------------
*/
#include "OgreD3D9VideoModeList.h"
#include "OgreException.h"

namespace Ogre 
{
        D3D9VideoModeList::D3D9VideoModeList( D3D9Driver* pDriver )
        {
                if( NULL == pDriver )
                        OGRE_EXCEPT( Exception::ERR_INVALIDPARAMS, "pDriver parameter is NULL", "D3D9VideoModeList::D3D9VideoModeList" );

                mpDriver = pDriver;
                enumerate();
        }

        D3D9VideoModeList::~D3D9VideoModeList()
        {
                mpDriver = NULL;
                mModeList.clear();
        }

        BOOL D3D9VideoModeList::enumerate()
        {
                UINT iMode;
                LPDIRECT3D9 pD3D = mpDriver->getD3D();
                UINT adapter = mpDriver->getAdapterNumber();

                for( iMode=0; iMode < pD3D->GetAdapterModeCount( adapter, D3DFMT_R5G6B5 ); iMode++ )
                {
                        D3DDISPLAYMODE displayMode;
                        pD3D->EnumAdapterModes( adapter, D3DFMT_R5G6B5, iMode, &displayMode );

                        // Filter out low-resolutions
                        if( displayMode.Width < 640 || displayMode.Height < 400 )
                                continue;

                        // Check to see if it is already in the list (to filter out refresh rates)
                        BOOL found = FALSE;
                        std::vector<D3D9VideoMode>::iterator it;
                        for( it = mModeList.begin(); it != mModeList.end(); it++ )
                        {
                                D3DDISPLAYMODE oldDisp = it->getDisplayMode();
                                if( oldDisp.Width == displayMode.Width &&
                                        oldDisp.Height == displayMode.Height &&
                                        oldDisp.Format == displayMode.Format )
                                {
                                        // Check refresh rate and favour higher if poss
                                        if (oldDisp.RefreshRate < displayMode.RefreshRate)
                                                it->increaseRefreshRate(displayMode.RefreshRate);
                                        found = TRUE;
                                        break;
                                }
                        }

                        if( !found )
                                mModeList.push_back( D3D9VideoMode( displayMode ) );
                }

                for( iMode=0; iMode < pD3D->GetAdapterModeCount( adapter, D3DFMT_X8R8G8B8 ); iMode++ )
                {
                        D3DDISPLAYMODE displayMode;
                        pD3D->EnumAdapterModes( adapter, D3DFMT_X8R8G8B8, iMode, &displayMode );

                        // Filter out low-resolutions
                        if( displayMode.Width < 640 || displayMode.Height < 400 )
                                continue;

                        // Check to see if it is already in the list (to filter out refresh rates)
                        BOOL found = FALSE;
                        std::vector<D3D9VideoMode>::iterator it;
                        for( it = mModeList.begin(); it != mModeList.end(); it++ )
                        {
                                D3DDISPLAYMODE oldDisp = it->getDisplayMode();
                                if( oldDisp.Width == displayMode.Width &&
                                        oldDisp.Height == displayMode.Height &&
                                        oldDisp.Format == displayMode.Format )
                                {
                                        // Check refresh rate and favour higher if poss
                                        if (oldDisp.RefreshRate < displayMode.RefreshRate)
                                                it->increaseRefreshRate(displayMode.RefreshRate);
                                        found = TRUE;
                                        break;
                                }
                        }

                        if( !found )
                                mModeList.push_back( D3D9VideoMode( displayMode ) );
                }

                return TRUE;
        }

        size_t D3D9VideoModeList::count()
        {
                return mModeList.size();
        }

        D3D9VideoMode* D3D9VideoModeList::item( size_t index )
        {
                std::vector<D3D9VideoMode>::iterator p = mModeList.begin();

                return &p[index];
        }

        D3D9VideoMode* D3D9VideoModeList::item( const String &name )
        {
                std::vector<D3D9VideoMode>::iterator it = mModeList.begin();
                if (it == mModeList.end())
                        return NULL;

                for (;it != mModeList.end(); ++it)
                {
                        if (it->getDescription() == name)
                                return &(*it);
                }

                return NULL;
        }
}