Hi Aki, Thanks for your reply. Unfortunately changing the font name to the Postscript name does not change the situation.
And also unfortunately, when I click Pause in the Debugger, the stack trace I gave is all that is shown. If there is a way to get a more complete stack trace, please let me know. -Stevo On Sep 15, 2010, at 5:14 PM, Aki Inoue wrote: > Since I didn't see the actual backtrace, I cannot comment on what could be > causing a spin lock deadlock. > > One glaring point I'm concerned with this example is that the font name being > passed to CGContextSelectFont is incorrect. > > All of our font APIs, both on Mac OS X and iOS, are expecting the postscript > name. > The font subsystem is optimized to query fonts via the postscript name > efficiently. > > In this case, the postscript name is "ComicSansMS-Bold". "Comic Sans MS > Bold" is a fullname (a version of user visible name). > > We're allowing queries with non-postscript name for API flexibility, but it > costs in both CPU and memory (we need to bring in more data from the font > files). > > I recommend using the postscript name to see if the issue goes away. > > Aki > > On 15.9.2010, at 16:44, Stevo Brock wrote: > >> Hi Vince, >> >> The details of the parameters to the function aren't important. The >> specific example I gave has been reduced down from some other code. In the >> end I'm not using Comic Sans, but it will come from an NSString. >> >> The point is that calling CGContextSelectFont() before doing some other >> undocumented something results in a spin lock. >> >> -Stevo >> >> >> On Sep 15, 2010, at 4:33 PM, Vince DeMarco wrote: >> >>> >>> On Sep 15, 2010, at 4:11 PM, Stevo Brock wrote: >>> >>>> Apparently the "font system" was not initialized before this call. >>>> Putting a "[UIFont familyNames]" somewhere previous causes things to roll >>>> just fine. >>>> >>>> I should mention that this is an OpenGL based app with minimal other >>>> system UI. >>>> >>>> -Stevo Brock >>>> Head of Development >>>> Monkey Tools, LLC >>>> www.monkey-tools.com >>>> >>>> >>> >>> This doesn't really matter but why are you doing this >>> >>> CGContextSelectFont(context, [@"Comic Sans MS Bold" UTF8String], 24.0, >>> kCGEncodingMacRoman); >>> >>> Why not just >>> >>> CGContextSelectFont(context, "Comic Sans MS Bold", 24.0, kCGEncodingAscii); >>> >>> I changed the encoding from MacRoman to Ascii since it is actually ascii. >>> >>> You are creating a Constant NSString with the @"" then turning around and >>> asking it for the UTF8 representation of that, which is the same as what i >>> just typed above. >>> >>> Vince >>> >>>> >>>> >>>> On Sep 15, 2010, at 1:49 PM, Stevo Brock wrote: >>>> >>>>> I'm trying to add some custom font support to an iPad app and I keep >>>>> running into a spinlock from CGContextSelectFont. >>>>> >>>>> Happens on SDK 4.0 Simulator and Device running 3.2.2. I've narrowed >>>>> down the code to: >>>>> >>>>> CGContextRef context = CGBitmapContextCreate(&data, 1, 1, 8, >>>>> 4, CGColorSpaceCreateDeviceRGB(), >>>>> >>>>> kCGImageAlphaPremultipliedLast); >>>>> CGContextSelectFont(context, [@"Comic Sans MS Bold" >>>>> UTF8String], 24.0, kCGEncodingMacRoman); >>>>> CGContextRelease(context); >>>>> >>>>> Depending on where I put this code, sometimes it runs through just fine >>>>> and sometimes it spinlocks. The stack trace is just: >>>>> >>>>> 0: __spin_lock >>>>> 1: ?? >>>>> >>>>> Where is it legal to call this function and why would it spin lock >>>>> elsewhere? Help! >>>>> >>>>> -Stevo Brock >>>>> Head of Development >>>>> Monkey Tools, LLC >>>>> www.monkey-tools.com >>>>> >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> >>>>> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) >>>>> >>>>> Please do not post admin requests or moderator comments to the list. >>>>> Contact the moderators at cocoa-dev-admins(at)lists.apple.com >>>>> >>>>> Help/Unsubscribe/Update your Subscription: >>>>> http://lists.apple.com/mailman/options/cocoa-dev/stevo%40monkey-tools.com >>>>> >>>>> This email sent to st...@monkey-tools.com >>>> >>>> _______________________________________________ >>>> >>>> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) >>>> >>>> Please do not post admin requests or moderator comments to the list. >>>> Contact the moderators at cocoa-dev-admins(at)lists.apple.com >>>> >>>> Help/Unsubscribe/Update your Subscription: >>>> http://lists.apple.com/mailman/options/cocoa-dev/demarco%40apple.com >>>> >>>> This email sent to dema...@apple.com >>> >> >> _______________________________________________ >> >> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) >> >> Please do not post admin requests or moderator comments to the list. >> Contact the moderators at cocoa-dev-admins(at)lists.apple.com >> >> Help/Unsubscribe/Update your Subscription: >> http://lists.apple.com/mailman/options/cocoa-dev/aki%40apple.com >> >> This email sent to a...@apple.com > _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. 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