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CGDisplay problems - peacha - May 14, 2002 02:53 AM

Hi all,
when I run a skeleton full screen app which switches res all the windows mess up once the app is done... I know it is normal if you do not capture the display... but I do

typedef unsigned int uint;

int main ()
CFDictionaryRef originalMode;

originalMode = CGDisplayCurrentMode (kCGDirectMainDisplay);
CGDisplayCapture (kCGDirectMainDisplay);
CGDisplayHideCursor (kCGDirectMainDisplay);

if (!switchToMode (640, 480, 32))
// no error check yet!

CGDisplaySwitchToMode (kCGDirectMainDisplay, originalMode);
CFRelease (originalMode);
CGDisplayRelease (kCGDirectMainDisplay);
CGDisplayShowCursor (kCGDirectMainDisplay);

return 0;

bool switchToMode (uint newWidth, uint newHeight, uint newColorDepth)
    CFDictionaryRef newMode;
    boolean_t result;

    newMode = CGDisplayBestModeForParameters (kCGDirectMainDisplay, newColorDepth, newWidth, newHeight, &result);

    if (result)
        result = (CGDisplaySwitchToMode (kCGDirectMainDisplay, newMode) == kCGErrorSuccess);

    CFRelease (newMode);
    return result;
Any help??? Thx

CGDisplay problems - Unregistered - May 17, 2002 06:55 AM

You should not CFRelease() the display mode. Only CFRelease() things that you CFCreate*() or CFRetain()

CGDisplay problems - peacha - May 18, 2002 01:35 PM

Thanx you're right!Grin