So I have an application that has been bedeviled by a nasty, nasty bug
for years that manifests itself as an exception being thrown with:
Error (1007) creating CGSWindow
At that point, the user has no choice but to reboot the machine - the
Window Server is pretty much hoarked.
Since the app is so complex, and the code path for tickling this bug
is so arbitrary, I've been loathe to file a bug on it, since I didn't
have a simple example to repro it.
Completely separately, I decided this AM to write a simple Cocoa app
to generate a bunch of test files for my group. Lo and behold, I
managed to tickle the bug.
Error (1007) creating CGSWindow
I just filed the radar bug as 6498067
but if anyone wants to take a look, I'm happy to send you the source
for the app - it's only 60KB, but the core of the thing looks like
this (it falls apart after making about 340 images, on my machine with
32GB of RAM, and a NVidia FX5600 w/1.5GB of VRAM):
where we're going from 0 to 1,000, and the width and height are
1920x1080 - seems to crap out after 340 files for me.
// eventually put this in a background thread with a cancel button on
a progress sheet
- (IBAction)generateFiles:(id)sender {
int start = [self.startingNumber intValue];
int howMany = 1 + [self.endingNumber intValue] - start;
NSSize imgSize = [self size];
int i, digits = [self.endingNumber digits];
int fontSize = [self determineFontSizeForNumber:self.endingNumber];
NSString* formatString = [NSString stringWithFormat:@"%%0%dd",
digits]; // end up with "%03d"
NSRect rect = NSMakeRect(0, 0, imgSize.width, imgSize.height);
for (i = 0; i < howMany; i++) {
NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
NSString* str = [NSString stringWithFormat:formatString, i];
NSFont* font = [NSFont systemFontOfSize:fontSize];
NSDictionary* dict = [NSDictionary
dictionaryWithObjectsAndKeys:font, NSFontAttributeName,
self.textColor, NSForegroundColorAttributeName, nil];
NSAttributedString* aStr = [[[NSAttributedString alloc]
initWithString:str attributes:dict] autorelease];
NSImage* image = [[NSImage alloc] initWithSize:imgSize];
[image lockFocus];
[aStr drawInRect:rect];
[image unlockFocus];
NSString* imgFormatString = [NSString stringWithFormat:@"%...@_%
%0%dd.tif", digits]; // end up with "%03d"
NSString* imgName = [NSString stringWithFormat:imgFormatString,
self.prefix, i];
NSString* imgPath = [self.directory
stringByAppendingPathComponent:imgName];
NSData* tiffData = [image
TIFFRepresentationUsingCompression:NSTIFFCompressionLZW factor:1.0];
[tiffData writeToFile:imgPath atomically:YES];
[pool drain];
}
}
Thanks for any insight.
--> Michael B. Johnson, PhD
--> http://homepage.mac.com/drwave (personal)
--> http://xenia.media.mit.edu/~wave (alum)
--> MPG Lead
--> Pixar Animation Studios
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