wxVideoMode wxDisplay::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_priv->m_hndl, &sMode) == noErr)
{
DMListIndexType nNumModes;
DMListType pModes;
DMDisplayModeListIteratorUPP uppMLI;
DisplayIDType nDisplayID;
wxASSERT(DMGetDisplayIDByGDevice(m_priv->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;
}
OSErr RVRequestVideoSetting (VideoRequestRecPtr requestRecPtr)
{
Boolean displayMgrPresent;
short iCount = 0; // just a counter of GDevices we have seen
DMDisplayModeListIteratorUPP myModeIteratorProc = nil; // for DM2.0 searches
SpBlock spBlock;
Boolean suppliedGDevice;
DisplayIDType theDisplayID; // for DM2.0 searches
DMListIndexType theDisplayModeCount; // for DM2.0 searches
DMListType theDisplayModeList; // for DM2.0 searches
long value = 0;
GDHandle walkDevice = nil; // for everybody
Gestalt(gestaltDisplayMgrAttr,&value);
displayMgrPresent=value&(1<<gestaltDisplayMgrPresent);
displayMgrPresent=displayMgrPresent && (SVersion(&spBlock)==noErr); // need slot manager
if (displayMgrPresent)
{
// init the needed data before we start
if (requestRecPtr->screenDevice) // user wants a specifc device?
{
walkDevice = requestRecPtr->screenDevice;
suppliedGDevice = true;
}
else
{
walkDevice = DMGetFirstScreenDevice (dmOnlyActiveDisplays); // for everybody
suppliedGDevice = false;
}
myModeIteratorProc = NewDMDisplayModeListIteratorProc(ModeListIterator); // for DM2.0 searches
// Note that we are hosed if somebody changes the gdevice list behind our backs while we are iterating....
// ...now do the loop if we can start
if( walkDevice && myModeIteratorProc) do // start the search
{
iCount++; // GDevice we are looking at (just a counter)
if( noErr == DMGetDisplayIDByGDevice( walkDevice, &theDisplayID, false ) ) // DM1.0 does not need this, but it fits in the loop
{
theDisplayModeCount = 0; // for DM2.0 searches
if (noErr == DMNewDisplayModeList(theDisplayID, 0, 0, &theDisplayModeCount, &theDisplayModeList) )
{
// search NuBus & PCI the new kool way through Display Manager 2.0
GetRequestTheDM2Way (requestRecPtr, walkDevice, myModeIteratorProc, theDisplayModeCount, &theDisplayModeList);
DMDisposeList(theDisplayModeList); // now toss the lists for this gdevice and go on to the next one
}
else
{
// search NuBus only the old disgusting way through the slot manager
GetRequestTheDM1Way (requestRecPtr, walkDevice);
}
}
} while ( !suppliedGDevice && nil != (walkDevice = DMGetNextScreenDevice ( walkDevice, dmOnlyActiveDisplays )) ); // go until no more gdevices
if( myModeIteratorProc )
DisposeRoutineDescriptor(myModeIteratorProc);
return (noErr); // we were able to get the look for a match
}
return (-1); // return a generic error
}
wxArrayVideoModes
wxDisplay::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_priv->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;
}
bool wxDisplay::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_priv->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_priv->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_priv->m_hndl, sMode.csData,
(unsigned long*) &(dwBPP), NULL
//(unsigned long) &sMode
, hDisplayState
) != noErr)
{
DMEndConfigureDisplays(hDisplayState);
wxMessageBox(wxString::Format(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;
}
