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Try to deal with the case when there is no current context.

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May happen in secondard threads. Fixes #25943.


git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@28133 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
fredkiefer 2009-03-25 08:40:38 +00:00
parent 719f644328
commit 7f7914ef97
2 changed files with 20 additions and 5 deletions
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19
Source/NSGraphicsContext.m
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@ -236,15 +236,20 @@ NSGraphicsContext *GSCurrentContext(void)
NSGraphicsContext *ctxt;
NSMutableDictionary *dict = [[NSThread currentThread] threadDictionary];
NSMutableArray *stack = [dict objectForKey: NSGraphicsContextStackKey];
if (stack == nil || [stack count] == 0)
if (stack == nil)
{
[NSException raise: NSGenericException
format: @"restoreGraphicsState without previous save"];
}
// might be nil, i.e. no current context
ctxt = [stack lastObject];
[NSGraphicsContext setCurrentContext: ctxt];
[stack removeLastObject];
[ctxt restoreGraphicsState];
if (ctxt)
{
[stack removeLastObject];
[ctxt restoreGraphicsState];
}
}
+ (void) saveGraphicsState
@ -257,9 +262,13 @@ NSGraphicsContext *GSCurrentContext(void)
stack = [[NSMutableArray allocWithZone: _globalGSZone] init];
[dict setObject: stack forKey: NSGraphicsContextStackKey];
}
// might be nil, i.e. no current context
ctxt = GSCurrentContext();
[ctxt saveGraphicsState];
[stack addObject: ctxt];
if (ctxt)
{
[ctxt saveGraphicsState];
[stack addObject: ctxt];
}
}
+ (void) setGraphicsState: (int)graphicsState