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# OgreDDVideoModeList.cpp

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    00001 /*
    00002 -----------------------------------------------------------------------------
    00003 This source file is part of OGRE
    00004     (Object-oriented Graphics Rendering Engine)
    00005 For the latest info, see http://www.ogre3d.org/
    00006
    00007 Copyright © 2000-2002 The OGRE Team
    00008 Also see acknowledgements in Readme.html
    00009
    00010 This program is free software; you can redistribute it and/or modify it under
    00011 the terms of the GNU Lesser General Public License as published by the Free Software
    00012 Foundation; either version 2 of the License, or (at your option) any later
    00013 version.
    00014
    00015 This program is distributed in the hope that it will be useful, but WITHOUT
    00016 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
    00017 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
    00018
    00019 You should have received a copy of the GNU Lesser General Public License along with
    00020 this program; if not, write to the Free Software Foundation, Inc., 59 Temple
    00021 Place - Suite 330, Boston, MA 02111-1307, USA, or go to
    00022 http://www.gnu.org/copyleft/lesser.txt.
    00023 -----------------------------------------------------------------------------
    00024 */
    00025 #include "OgreDDVideoModeList.h"
    00026 #include "OgreDDVideoMode.h"
    00027 #include "OgreException.h"
    00028
    00029 namespace Ogre {
    00030
    00031     // Non-member callback functions
    00032     static HRESULT CALLBACK DDEnumModesCallback(
    00033                                     LPDDSURFACEDESC2 lpDDSD2,
    00034                                     LPVOID lpContext)
    00035     {
    00036         DDVideoModeList* modeList;
    00037
    00038         // Omit any palettised modes
    00039         if (lpDDSD2->ddpfPixelFormat.dwRGBBitCount >= 16)
    00040         {
    00041
    00042             modeList = (DDVideoModeList*) lpContext;
    00043
    00044             modeList->AddMode(lpDDSD2);
    00045         }
    00046
    00047         // Continue enumeration
    00048         return DDENUMRET_OK;
    00049     }
    00050
    00051
    00052     DDVideoModeList::DDVideoModeList(LPDIRECTDRAW7 directDraw)
    00053     {
    00054         // Will create a  new driver list and enumerate it
    00055         if (directDraw == NULL)
    00056             throw Exception(0, "NULL supplied as "
    00057                 "DD interface pointer.", "DDVideoModeList Contructor");
    00058
    00059         lpDD7 = directDraw;
    00060         // Enumerate the list
    00061         enumerate();
    00062
    00063     }
    00064
    00065     DDVideoModeList::~DDVideoModeList()
    00066     {
    00067         // Release each video mode object
    00068         std::vector<DDVideoMode>::iterator p = mModeList.begin();
    00069
    00070         mModeList.erase(p, p+mModeList.size()-1);
    00071     }
    00072
    00073
    00074
    00075
    00076     BOOL DDVideoModeList::enumerate()
    00077     {
    00078         HRESULT hr;
    00079
    00080         // Enumerate display modes
    00081         // Different refresh rates are NOT enumerated (dwFlags = 0)
    00082         hr = lpDD7->EnumDisplayModes(0, NULL, this, DDEnumModesCallback);
    00083         if (FAILED(hr))
    00084             throw Exception(0, "Error enumerating display modes", "DDVideoModeList - enumerate");
    00085
    00086
    00087         return TRUE;
    00088     }
    00089
    00090     void DDVideoModeList::AddMode(LPDDSURFACEDESC2 lpDDSD2)
    00091     {
    00092         //DDVideoMode *newMode;
    00093
    00094
    00095         // Create new mode
    00096         //newMode = new DDVideoMode(lpDDSD2);
    00097
    00098         // Add it to my list
    00099         mModeList.push_back(DDVideoMode(lpDDSD2));
    00100
    00101
    00102     }
    00103
    00104     unsigned int DDVideoModeList::count(void)
    00105     {
    00106         return static_cast< unsigned int >( mModeList.size() );
    00107     }
    00108
    00109     DDVideoMode* DDVideoModeList::item(int index)
    00110     {
    00111         // Get an iterator for the vector
    00112         std::vector<DDVideoMode>::iterator p = mModeList.begin();
    00113
    00114         // Return the indexed driver
    00115         return &p[index];
    00116
    00117
    00118     }
    00119
    00120     DDVideoMode* DDVideoModeList::getClosestMatch(int width, int height, int colourDepth)
    00121     {
    00122         // Search through looking for closest match
    00123         int bestDiff, currentDiff, bestIndex;
    00124         DDVideoMode *vm;
    00125
    00126         std::vector<DDVideoMode>::iterator p = mModeList.begin();
    00127
    00128
    00129         bestDiff = 9999;
    00130         bestIndex = -1;
    00131         for( unsigned j = 0; j < count(); j++ )
    00132         {
    00133             currentDiff = 0;
    00134             vm = &p[j];
    00135             currentDiff += abs(vm->mWidth - width);
    00136             currentDiff += abs(vm->mHeight - height);
    00137             currentDiff += abs(vm->mColourDepth - colourDepth);
    00138
    00139             if (currentDiff < bestDiff)
    00140             {
    00141                 bestDiff = currentDiff;
    00142                 bestIndex = j;
    00143             }
    00144
    00145             /* We Love Intel's Compilers :) */
    00146             if (currentDiff == 0)
    00147                 break; // No point continuing, direct match
    00148         }
    00149
    00150         return &p[bestIndex];
    00151     }
    00152
    00153 }
    00154
    00155

Copyright © 2002-2003 by The OGRE Team
Last modified Sun Nov 28 19:48:22 2004