display.cpp

很牛的GUI源码wxWidgets-2.8.0.zip 可在多种平台下运行.

};

pascal void DMModeListIteratorProc(
    void* pData,
    DMListIndexType nIndex,
    DMDisplayModeListEntryPtr pInfo)
{
    DMModeIteratorRec* pInfoData = (DMModeIteratorRec*) pData;

    // Note that in testing the refresh rate is always 0 on my ibook - RN
    int refresh = (int) Fix2Long(pInfo->displayModeResolutionInfo->csRefreshRate);

#define pDBI pInfo->displayModeDepthBlockInfo->depthVPBlock[i].depthVPBlock

    for (unsigned long i = 0; i < pInfo->displayModeDepthBlockInfo->depthBlockCount; ++i)
    {
        if (wxVideoMode( (int) pInfo->displayModeResolutionInfo->csHorizontalPixels,
                        (int) pInfo->displayModeResolutionInfo->csVerticalLines,
                        (int) pDBI->vpPixelSize,
                        refresh).Matches(*pInfoData->pMatchMode) )
        {
            pInfoData->pModes->Add(
                wxVideoMode(
                    (int) pInfo->displayModeResolutionInfo->csHorizontalPixels,
                    (int) pInfo->displayModeResolutionInfo->csVerticalLines,
                    (int) pDBI->vpPixelSize,
                    refresh ) );
        }
    }

#undef pDBI
}

struct DMModeInfoRec
{
    const wxVideoMode* pMode;
    VDSwitchInfoRec sMode;
    bool bMatched;
};

pascal void DMModeInfoProc(
    void* pData,
    DMListIndexType nIndex,
    DMDisplayModeListEntryPtr pInfo )
{
    DMModeInfoRec* pInfoData = (DMModeInfoRec*) pData;
    Fixed refresh = Long2Fix(pInfoData->pMode->refresh);

#define pDBI pInfo->displayModeDepthBlockInfo->depthVPBlock[i].depthVPBlock

    for (unsigned long i = 0; i < pInfo->displayModeDepthBlockInfo->depthBlockCount; ++i)
    {
        if (pInfoData->pMode->w == (int&) pInfo->displayModeResolutionInfo->csHorizontalPixels &&
            pInfoData->pMode->h == (int&) pInfo->displayModeResolutionInfo->csVerticalLines &&
            pInfoData->pMode->bpp == (int) pDBI->vpPixelSize &&
            refresh == pInfo->displayModeResolutionInfo->csRefreshRate)
        {
            memcpy(
                &pInfoData->sMode,
                pInfo->displayModeDepthBlockInfo->depthVPBlock[i].depthSwitchInfo,
                sizeof(VDSwitchInfoRec));
            pInfoData->sMode.csMode = pDBI->vpPixelSize;
            pInfoData->bMatched = true;
            break;
        }
    }

#undef pDBI
}

struct DMModeTransRec
{
    wxVideoMode Mode;
    const VDSwitchInfoRec* psMode;
    bool bMatched;
};

pascal void DMModeTransProc(
    void* pData,
    DMListIndexType nIndex,
    DMDisplayModeListEntryPtr pInfo)
{
    DMModeTransRec* pInfoData = (DMModeTransRec*) pData;

#define pDBI pInfo->displayModeDepthBlockInfo->depthVPBlock[i].depthVPBlock

    for (unsigned long i = 0; i < pInfo->displayModeDepthBlockInfo->depthBlockCount; ++i)
    {
        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;

    // Check DM version == 2
    // (for backward compatibility only - 7.5.3+ use 2.0)
    Gestalt( gestaltDisplayMgrVers, (long*) &dwDMVer );
    if (dwDMVer >= 0x020000)
    {
        DMListIndexType nNumModes;
        DMListType pModes;
        DMDisplayModeListIteratorUPP uppMLI;
        DisplayIDType nDisplayID;
        OSErr err;

        err = DMGetDisplayIDByGDevice(m_hndl, &nDisplayID, false);
        verify_noerr( err );

        // Create a new list...
        err = DMNewDisplayModeList(nDisplayID, NULL, NULL, &nNumModes, &pModes);
        wxASSERT_MSG( err == 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)
        {
            err = DMGetIndexedDisplayModeFromList(pModes, i, NULL, uppMLI, &sModeInfo);
            verify_noerr( err );
        }

        DisposeDMDisplayModeListIteratorUPP(uppMLI);
        err = DMDisposeList(pModes);
        verify_noerr( err );
    }
    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;

    // Check DM version == 2
    // (for backward compatibility only - 7.5.3+ use 2.0)
    Gestalt( gestaltDisplayMgrVers, (long*) &dwDMVer );
    if (dwDMVer >= 0x020000)
    {
        VDSwitchInfoRec sMode; // Note: csMode member also contains the bit depth
        OSErr err;

        err = DMGetDisplayMode( m_hndl, &sMode );
        if (err == noErr)
        {
            DMListIndexType nNumModes;
            DMListType pModes;
            DMDisplayModeListIteratorUPP uppMLI;
            DisplayIDType nDisplayID;

            err = DMGetDisplayIDByGDevice(m_hndl, &nDisplayID, false);
            verify_noerr( err );

            // Create a new list...
            err = DMNewDisplayModeList(nDisplayID, NULL, NULL, &nNumModes, &pModes);
            wxASSERT_MSG( err == 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)
            {
                err = DMGetIndexedDisplayModeFromList(pModes, i, NULL, uppMLI, &sModeInfo);
                verify_noerr( err );

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

            DisposeDMDisplayModeListIteratorUPP(uppMLI);
            err = DMDisposeList(pModes);
            verify_noerr( err );
        }
        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)
        {
             return true;

#if 0
//#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
#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;
        OSErr err;

        err = DMGetDisplayIDByGDevice(m_hndl, &nDisplayID, false);
        verify_noerr( err );

        // Create a new list...
        err = DMNewDisplayModeList(nDisplayID, NULL, NULL, &nNumModes, &pModes);
        wxASSERT_MSG(err == 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)
        {
            err = DMGetIndexedDisplayModeFromList(pModes, i, NULL, uppMLI, &sModeInfo);
            verify_noerr( err );

            if (sModeInfo.bMatched)
            {
                sMode = sModeInfo.sMode;
                break;
            }
        }

        if (i == nNumModes)
            return false;

        DisposeDMDisplayModeListIteratorUPP(uppMLI);

        err = DMDisposeList(pModes);
        verify_noerr( err );

        // 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;
        err = DMSetDisplayMode(
            m_hndl, sMode.csData,
            (unsigned long*) &(dwBPP),
            NULL, //(unsigned long) &sMode
            hDisplayState );

        if (err != 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 // !OSX

#endif // wxUSE_DISPLAY