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Bug 397209 - Catch ObjC exception when trying to draw to an offscreen buffer. r=josh sr=vlad a1.9=vlad

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cbarrett@mozilla.com 2007-10-05 14:24:01 -07:00
parent 72fe490130
commit 9f3cde2e41
1 changed files with 7 additions and 1 deletions
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8
widget/src/cocoa/nsNativeThemeCocoa.mm
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@ -189,7 +189,13 @@ nsNativeThemeCocoa::DrawButton(CGContextRef cgContext, ThemeButtonKind inKind,
drawFrame.size.height = offscreenHeight - NATIVE_PUSH_BUTTON_HEIGHT_DIFF;
// draw into offscreen image
[image lockFocus];
NS_DURING
[image lockFocus];
NS_HANDLER
NS_ASSERTION(0, "Could not lock focus on offscreen buffer");
[image release];
return;
NS_ENDHANDLER
[[NSGraphicsContext currentContext] setImageInterpolation:NSImageInterpolationLow];
HIThemeDrawButton(&drawFrame, &bdi, (CGContext*)[[NSGraphicsContext currentContext] graphicsPort], kHIThemeOrientationInverted, NULL);
[image unlockFocus];