int main ( int argc, const char * argv[])
{
CGDirectDisplayID displays[ MAX_DISPLAYS ];
CGDisplayCount displayCount = 0;
CGDisplayErr err =
CGGetOnlineDisplayList( MAX_DISPLAYS, displays, &displayCount );
if ( err == kCGErrorSuccess ) {
int i;
for ( i = 0; i < displayCount; i++ ) {
io_service_t service = CGDisplayIOServicePort( displays[ i ]);
if ( service )
IOServiceRequestProbe( service, kIOFBUserRequestProbe );
}
} else {
fprintf( stderr, "CGGetOnlineDisplayList returned error code %d\n",
( int )err );
return ( int )err;
}
return EXIT_SUCCESS;
}
int
main(int argc, char **argv)
{
int i;
long angle = 0;
io_service_t service;
CGDisplayErr dErr;
CGDirectDisplayID targetDisplay = 0;
IOOptionBits options;
while ((i = getopt(argc, argv, "d:limr:")) != -1) {
switch (i) {
case 'd':
targetDisplay = (CGDirectDisplayID)strtol(optarg, NULL, 16);
if (targetDisplay == 0)
targetDisplay = CGMainDisplayID();
break;
case 'l':
listDisplays();
break;
case 'i':
infoDisplays();
break;
case 'm':
setMainDisplay(targetDisplay);
break;
case 'r':
angle = strtol(optarg, NULL, 10);
break;
default:
break;
}
}
if (targetDisplay == 0)
usage();
options = angle2options(angle);
// Get the I/O Kit service port of the target display
// Since the port is owned by the graphics system, we should not destroy it
service = CGDisplayIOServicePort(targetDisplay);
// We will get an error if the target display doesn't support the
// kIOFBSetTransform option for IOServiceRequestProbe()
dErr = IOServiceRequestProbe(service, options);
if (dErr != kCGErrorSuccess) {
fprintf(stderr, "IOServiceRequestProbe: error %d\n", dErr);
exit(1);
}
exit(0);
}
int main(int argc, char * argv[])
{
io_service_t service;
CGError err;
int i;
CGDisplayCount max;
CGDirectDisplayID displayIDs[8];
uint32_t mask;
IOOptionBits options;
CFNumberRef num;
SInt32 value;
err = CGGetOnlineDisplayList(8, displayIDs, &max);
if(err != kCGErrorSuccess)
exit(1);
if(max > 8)
max = 8;
if( argc < 2)
options = kIOFBUserRequestProbe;
else
options = strtol( argv[1], 0, 0 );
if (strstr(argv[0], "rotate"))
{
switch (options)
{
case 90:
options = kIOFBSetTransform | (kIOScaleRotate90 << 16);
break;
case 180:
options = kIOFBSetTransform | (kIOScaleRotate180 << 16);
break;
case 270:
options = kIOFBSetTransform | (kIOScaleRotate270 << 16);
break;
case 0:
default:
options = kIOFBSetTransform | (kIOScaleRotate0 << 16);
break;
}
}
if( argc < 3)
mask = 0xffffffff;
else
mask = strtol( argv[2], 0, 0 );
for(i = 0; i < max; i++ )
{
if (!(mask & (1 << i)))
continue;
service = CGDisplayIOServicePort(displayIDs[i]);
num = (CFNumberRef) IORegistryEntryCreateCFProperty( service,
CFSTR(kIOFBTransformKey),
kCFAllocatorDefault, kNilOptions);
if (num)
CFNumberGetValue( num, kCFNumberSInt32Type, (SInt32 *) &value );
else
value = 0;
value &= kIOScaleRotateFlags;
printf("Display %p: current transform: ", displayIDs[i]);
switch (value)
{
case kIOScaleRotate90:
printf("90\n");
break;
case kIOScaleRotate180:
printf("180\n");
break;
case kIOScaleRotate270:
printf("270\n");
break;
case kIOScaleRotate0:
default:
printf("0\n");
break;
}
num = (CFNumberRef) IORegistryEntryCreateCFProperty( service,
CFSTR(kIOFBProbeOptionsKey),
kCFAllocatorDefault, kNilOptions);
if (num)
CFNumberGetValue( num, kCFNumberSInt32Type, (SInt32 *) &value );
else
value = 0;
printf("Display %p: does %ssupport kIOFBSetTransform\n", displayIDs[i], value & kIOFBSetTransform ? "" : "not ");
if (value & kIOFBSetTransform)
{
err = IOServiceRequestProbe(service, options );
printf("Display %p: IOServiceRequestProbe(%d)\n", displayIDs[i], err);
}
}
exit(0);
return(0);
}