display.cpp

Wxpython Implemented on Windows CE, Source code

    for(unsigned long i = 0; i < pInfo->displayModeDepthBlockInfo->depthBlockCount; ++i)
        {
#define pDBI pInfo->displayModeDepthBlockInfo->depthVPBlock[i].depthVPBlock
        if (pInfoData->psMode->csData == pInfo->displayModeDepthBlockInfo->depthVPBlock[i].depthSwitchInfo->csData)
            {
            pInfoData->Mode = wxVideoMode((int) pInfo->displayModeResolutionInfo->csHorizontalPixels,
                                 (int) pInfo->displayModeResolutionInfo->csVerticalLines,
                                 (int) pDBI->vpPixelSize,
                                 (int) Fix2Long(pInfo->displayModeResolutionInfo->csRefreshRate) );
            pInfoData->bMatched = true;
            break;
            }
#undef pDBI
        }
}

wxArrayVideoModes wxDisplayImplMac::GetModes(const wxVideoMode& mode) const
{
    wxArrayVideoModes Modes;

    unsigned long dwDMVer;
    Gestalt(gestaltDisplayMgrVers, (long*) &dwDMVer);

    //Check DM version (for backward compatibility only - 7.5.3+ use 2.0)
    if (dwDMVer >= 0x020000) //version 2?
    {

        DMListIndexType nNumModes;
        DMListType pModes;
        DMDisplayModeListIteratorUPP uppMLI;
        DisplayIDType nDisplayID;

        wxASSERT(DMGetDisplayIDByGDevice(m_hndl, &nDisplayID, false) == noErr);
        //Create a new list...
        wxASSERT_MSG(DMNewDisplayModeList(nDisplayID, NULL, NULL, &nNumModes,                             &pModes) == noErr, wxT("Could not create a new display mode list") );

        uppMLI = NewDMDisplayModeListIteratorUPP(DMModeListIteratorProc);
        wxASSERT(uppMLI);

        DMModeIteratorRec sModeInfo;
        sModeInfo.pModes = &Modes;
        sModeInfo.pMatchMode = &mode;
        for (DMListIndexType i = 0; i < nNumModes; ++i)
        {
            wxASSERT(DMGetIndexedDisplayModeFromList(pModes, i, NULL,
                              uppMLI, &sModeInfo) == noErr);
        }
        DisposeDMDisplayModeListIteratorUPP(uppMLI);
        wxASSERT(DMDisposeList(pModes) == noErr);
    }
    else //DM 1.0, 1.2, 1.x
    {
        wxLogSysError(wxString::Format(wxT("Display Manager Version %u Not Supported!  Present? %s"),
                    (unsigned int) dwDMVer / 0x10000,
                    (dwDMVer & (1 << gestaltDisplayMgrPresent) ? wxT("Yes") : wxT("No"))  )
                     );
    }

    return Modes;
}

wxVideoMode wxDisplayImplMac::GetCurrentMode() const
{
    unsigned long dwDMVer;
    wxVideoMode RetMode;

    Gestalt(gestaltDisplayMgrVers, (long*) &dwDMVer);
    //Check DM version (for backward compatibility only - 7.5.3+ use 2.0)
    if (dwDMVer >= 0x020000) //version 2?
    {
        VDSwitchInfoRec sMode; //Note - csMode member also contains the bit depth
        if (DMGetDisplayMode(m_hndl, &sMode) == noErr)
        {
            DMListIndexType nNumModes;
            DMListType pModes;
            DMDisplayModeListIteratorUPP uppMLI;
            DisplayIDType nDisplayID;

            wxASSERT(DMGetDisplayIDByGDevice(m_hndl, &nDisplayID, false) == noErr);
            //Create a new list...
            wxASSERT_MSG(DMNewDisplayModeList(nDisplayID, NULL, NULL, &nNumModes, &pModes) == noErr,
                      wxT("Could not create a new display mode list") );

            uppMLI = NewDMDisplayModeListIteratorUPP(DMModeTransProc);
            wxASSERT(uppMLI);

            DMModeTransRec sModeInfo;
            sModeInfo.bMatched = false;
            sModeInfo.psMode = &sMode;
            for (DMListIndexType i = 0; i < nNumModes; ++i)
            {
                wxASSERT(DMGetIndexedDisplayModeFromList(pModes, i, NULL,
                                                uppMLI, &sModeInfo) == noErr);

                if ( sModeInfo.bMatched == true )
                {
                    RetMode = sModeInfo.Mode;
                    break;
                }
            }

            DisposeDMDisplayModeListIteratorUPP(uppMLI);
            wxASSERT(DMDisposeList(pModes) == noErr);
        }
        else //Can't get current mode?
        {
            wxLogSysError(wxString::Format(wxT("Couldn't obtain current display mode!!!\ndwDMVer:%u"),
                                    (unsigned int) dwDMVer));
        }
    }
    else //DM ver 1
    {
        wxLogSysError(wxString::Format(wxT("Display Manager Version %u Not Supported!  Present? %s"),
                    (unsigned int) dwDMVer / 0x10000,
                    (dwDMVer & (1 << gestaltDisplayMgrPresent) ? wxT("Yes") : wxT("No")) )
                     );
    }

    return RetMode;
}

bool wxDisplayImplMac::ChangeMode(const wxVideoMode& mode)
{
    unsigned long dwDMVer;
    Gestalt(gestaltDisplayMgrVers, (long*)&dwDMVer);
    if (GetCount() == 1 || dwDMVer >= 0x020000)
    {
        if (mode == wxDefaultVideoMode)
        {
//#ifndef __DARWIN__
//            Handle hDisplayState;
//            if (DMBeginConfigureDisplays(&hDisplayState) != noErr)
//                {
//                wxLogSysError(wxT("Could not lock display for display mode changing!"));
//                return false;
//                }
//            wxASSERT( DMUseScreenPrefs(true, hDisplayState) == noErr);
//            DMEndConfigureDisplays(hDisplayState);
//            return true;
//#else
            //hmmmmm....
            return true;
//#endif
        }

        //0 & NULL for params 2 & 3 of DMSetVideoMode signal it to use defaults (current mode)
        //DM 2.0+ doesn't use params 2 & 3 of DMSetDisplayMode
        //so we have to use this icky structure
        VDSwitchInfoRec sMode;
        memset(&sMode, 0, sizeof(VDSwitchInfoRec) );

        DMListIndexType nNumModes;
        DMListType pModes;
        DMDisplayModeListIteratorUPP uppMLI;
        DisplayIDType nDisplayID;

        wxASSERT(DMGetDisplayIDByGDevice(m_hndl, &nDisplayID, false) == noErr);
        //Create a new list...
        wxASSERT_MSG(DMNewDisplayModeList(nDisplayID, NULL, NULL, &nNumModes, &pModes) == noErr,
                  wxT("Could not create a new display mode list") );

        uppMLI = NewDMDisplayModeListIteratorUPP(DMModeInfoProc);
        wxASSERT(uppMLI);

        DMModeInfoRec sModeInfo;
        sModeInfo.bMatched = false;
        sModeInfo.pMode = &mode;
        unsigned int i;
        for(i = 0; i < nNumModes; ++i)
        {
            wxASSERT(DMGetIndexedDisplayModeFromList(pModes, i, NULL,
                                               uppMLI, &sModeInfo) == noErr);
            if (sModeInfo.bMatched == true)
            {
                sMode = sModeInfo.sMode;
                break;
            }
        }
        if(i == nNumModes)
            return false;

        DisposeDMDisplayModeListIteratorUPP(uppMLI);
        wxASSERT(DMDisposeList(pModes) == noErr);

        // For the really paranoid -
        //         unsigned long flags;
        //      Boolean bok;
        //     wxASSERT(noErr == DMCheckDisplayMode(m_hndl, sMode.csData,
        //                                  sMode.csMode, &flags, NULL, &bok));
        //     wxASSERT(bok);

        Handle hDisplayState;
        if (DMBeginConfigureDisplays(&hDisplayState) != noErr)
        {
            wxLogSysError(wxT("Could not lock display for display mode changing!"));
            return false;
        }

        unsigned long dwBPP = (unsigned long) mode.bpp;
        if (DMSetDisplayMode(m_hndl, sMode.csData,
                            (unsigned long*) &(dwBPP), NULL
                           //(unsigned long) &sMode
                           , hDisplayState
                           )  != noErr)
        {
            DMEndConfigureDisplays(hDisplayState);
            wxLogError(wxT("Could not set the display mode"));
            return false;
        }
        DMEndConfigureDisplays(hDisplayState);
    }
    else  //DM 1.0, 1.2, 1.x
    {
        wxLogSysError(wxString::Format(wxT("Monitor gravitation not supported yet.  dwDMVer:%u"),
                    (unsigned int) dwDMVer));
            return false;
    }

    return true;
}

// ============================================================================
// wxDisplay::CreateFactory()
// ============================================================================

/* static */ wxDisplayFactory *wxDisplay::CreateFactory()
{
    return new wxDisplayFactoryMac;
}

#endif // wxUSE_DISPLAY