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
}
//--------------------------------------------------------------
//
// Implementation of sample code
//
//--------------------------------------------------------------
OSErr RVSetVideoRequest (VideoRequestRecPtr requestRecPtr)
{
GDHandle aMonitor;
Boolean displayMgrPresent;
unsigned long displayMgrVersion;
OSErr err;
Boolean isColor;
long value = 0;
Gestalt(gestaltDisplayMgrVers, (long*)&displayMgrVersion);
Gestalt(gestaltDisplayMgrAttr,&value);
displayMgrPresent=value&(1<<gestaltDisplayMgrPresent);
if (displayMgrPresent)
{
if (requestRecPtr->displayMode && requestRecPtr->depthMode)
{
if (requestRecPtr->availBitDepth == 1) // Based on avail bit depth,
isColor = KMonoDev; // set the device to a mono device, or
else isColor = kColorDev; // set the device to a color device
SetDeviceAttribute(requestRecPtr->screenDevice,gdDevType,isColor);
// see how many monitors we have, aMonitor will be nil if we have only one.
aMonitor = DMGetFirstScreenDevice (dmOnlyActiveDisplays); // get the first guy
aMonitor = DMGetNextScreenDevice ( aMonitor, dmOnlyActiveDisplays ); // get the next guy
if (nil == aMonitor || displayMgrVersion >= 0x00020000)
{
// only call DMSetDisplayMode if we have one monitor or DM2.0 is installed
// since DM1.0 does not automatically gravitate monitors and our gravitate code
// is not implemented.
err = DMSetDisplayMode( requestRecPtr->screenDevice, // GDevice
requestRecPtr->displayMode, // DM1.0 uses this
&requestRecPtr->depthMode, // DM1.0 uses this
(unsigned long) &(requestRecPtr->switchInfo), // DM2.0 uses this rather than displayMode/depthMode combo
nil);
if (noErr == err)
{
// Do the monitor gravitate here if we are using a version less than DM2.0
if (displayMgrVersion < 0x00020000)
GravitateMonitors ();
}
else if (kDMDriverNotDisplayMgrAwareErr == err)
{
// DM not supported by driver, so all we can do is set the bit depth
err = SetDepth (requestRecPtr->screenDevice, requestRecPtr->depthMode, gdDevType, isColor);
}
}
else
{
// we have more than one monitor and DM1.0 is installed, so all we can do is set the bit depth
err = SetDepth (requestRecPtr->screenDevice, requestRecPtr->depthMode, gdDevType, isColor);
}
return (err); // we did try to set the request
}
}
return (-1); // return a generic error
}
size_t wxDisplayBase::GetCount()
{
GDHandle hndl;
size_t num = 0;
hndl = DMGetFirstScreenDevice(true);
while(hndl)
{
num++;
hndl = DMGetNextScreenDevice(hndl, true);
}
return num;
}
wxDisplay::wxDisplay(size_t index) : wxDisplayBase ( index ),
m_priv ( new wxDisplayMacPriv() )
{
GDHandle hndl;
hndl = DMGetFirstScreenDevice(true);
m_priv->m_hndl = NULL;
while(hndl)
{
if (index == 0)
{
m_priv->m_hndl = hndl;
}
index--;
hndl = DMGetNextScreenDevice(hndl, true);
}
}
int wxDisplayBase::GetFromPoint(const wxPoint &p)
{
GDHandle hndl;
size_t num = 0;
hndl = DMGetFirstScreenDevice(true);
while(hndl)
{
Rect screenrect = (*hndl)->gdRect;
if (p.x >= screenrect.left &&
p.x <= screenrect.right &&
p.y >= screenrect.top &&
p.y <= screenrect.bottom)
{
return num;
}
num++;
hndl = DMGetNextScreenDevice(hndl, true);
}
return -1;
}