Getting graphic card information in objective C - objective-c

Question

I need to get Graphics card information in my application. The information I need is the same as displayed by *system_profiler SPDisplays* command under the section Graphics/Displays:.
I have already considered using sysctl(), but I am unable to find proper hardware selector for graphics card in sysctl.h
Any suggestions highly appericiated.

Answer 1

After fiddling with IOKit I have managed to fetch the required information. The code can be seen here (original source)and below:
- (void)displayGraphicsInfo
{
// Get dictionary of all the PCI Devicces
CFMutableDictionaryRef matchDict = IOServiceMatching("IOPCIDevice");
// Create an iterator
io_iterator_t iterator;
if (IOServiceGetMatchingServices(kIOMasterPortDefault,matchDict,
&iterator) == kIOReturnSuccess)
{
// Iterator for devices found
io_registry_entry_t regEntry;
while ((regEntry = IOIteratorNext(iterator))) {
// Put this services object into a dictionary object.
CFMutableDictionaryRef serviceDictionary;
if (IORegistryEntryCreateCFProperties(regEntry,
&serviceDictionary,
kCFAllocatorDefault,
kNilOptions) != kIOReturnSuccess)
{
// Service dictionary creation failed.
IOObjectRelease(regEntry);
continue;
}
const void *GPUModel = CFDictionaryGetValue(serviceDictionary, #"model");
if (GPUModel != nil) {
if (CFGetTypeID(GPUModel) == CFDataGetTypeID()) {
// Create a string from the CFDataRef.
NSString *modelName = [[NSString alloc] initWithData:
(NSData *)GPUModel encoding:NSASCIIStringEncoding];
NSLog(#"GPU Model: %#", modelName);
[modelName release];
}
}
// Release the dictionary
CFRelease(serviceDictionary);
// Release the serviceObject
IOObjectRelease(regEntry);
}
// Release the iterator
IOObjectRelease(iterator);
}
}