Crash in NSImage -lockFocus
Crash in NSImage -lockFocus
- Subject: Crash in NSImage -lockFocus
- From: Paul Collins <email@hidden>
- Date: Thu, 30 Sep 2004 12:03:33 -0700
Any suggestions as to what might cause this crash? The code below was
executed roughly 15,000 times over 15 hours before it crashed. The
NSImage is created from a web-downloaded file, although the same file
was processed before so I don't think it's caused by bad data. My app
also occassionally crashes in NSView -lockFocus but we think this is a
different issue - or is it?
Exception: EXC_BAD_ACCESS (0x0001)
Codes: KERN_INVALID_ADDRESS (0x0001) at 0x8ea2d503
Thread 0 Crashed:
#0 0x936f9d00 in CGSReleaseObj
#1 0x91f516c0 in ripc_InitializeDevice
#2 0x91f56598 in __CGWindowContextCreate
#3 0x93731050 in CGWindowContextCreate
#4 0x9311a52c in -[NSWindowGraphicsContext _initWithWindowNumber:]
#5 0x93078fe0 in -[NSWindow _threadContext]
#6 0x93084674 in -[NSWindow _windowDeviceRound]
#7 0x930f6750 in CreateCacheWindow
#8 0x931321cc in NewCacheWindowInfo
#9 0x930ed600 in GetSharedSpaceFor
#10 0x930c1954 in _NXAllocateImageCache
#11 0x930a4588 in -[NSImage _focusOnCache:]
#12 0x930cbee8 in -[NSImage _cacheRepresentation:stayFocused:]
#13 0x930f4c6c in -[NSImage _lockFocusOnRep:]
#14 0x930ccce8 in -[NSImage lockFocus]
#15 0x0001e1a0 in -[ODSlide makeThumbnailWithImage:size:]
- (void)makeThumbnailWithImage:(NSImage *)image size:(NSSize)thumbsize {
NSSize mySize = truSize; // Original image's size calculated from
height/width (i.e., pixels)
if (mySize.width == 0) {
mySize = [image size]; // if no truSize, use image size
}
[image setScalesWhenResized:YES];
[image setFlipped:YES];
[image setSize: NSMakeSize(128,128)]; // resize the image to this
particular size
[image recache];
NS_DURING
[image lockFocus]; // Force image to be cached by Quartz
[image unlockFocus];
NS_HANDLER
ODLog(@"Exception: NSImage -lockFocus failed for object %@", [self
canonURL]);
NS_ENDHANDLER
}
Thanks,
Paul Collins
** Gracion Software http://www.gracion.com/ **
** Tel: +1 (541) 488-3488 iChat/AV/AIM: gracionsoft **
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