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handling nil images correctly, solves #12956

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66979 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Stefan Csomor
2011-02-20 06:31:12 +00:00
parent 2daf63c4eb
commit 89a5da7c75
1 changed files with 17 additions and 13 deletions
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28
src/osx/carbon/utilscocoa.mm
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@@ -409,18 +409,22 @@ CGImageRef wxOSXCreateCGImageFromNSImage( WX_NSImage nsimage )
{
// based on http://www.mail-archive.com/cocoa-dev@lists.apple.com/msg18065.html
NSSize imageSize = [nsimage size];
CGColorSpaceRef genericRGB = CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB);
CGContextRef context = CGBitmapContextCreate(NULL, imageSize.width, imageSize.height, 8, 0, genericRGB, kCGImageAlphaPremultipliedFirst);
NSGraphicsContext *nsGraphicsContext = [NSGraphicsContext graphicsContextWithGraphicsPort:context flipped:NO];
[NSGraphicsContext saveGraphicsState];
[NSGraphicsContext setCurrentContext:nsGraphicsContext];
[[NSColor whiteColor] setFill];
NSRectFill(NSMakeRect(0.0, 0.0, imageSize.width, imageSize.height));
[nsimage drawAtPoint:NSZeroPoint fromRect:NSZeroRect operation:NSCompositeCopy fraction:1.0];
[NSGraphicsContext setCurrentContext:nsGraphicsContext];
CGImageRef image = CGBitmapContextCreateImage(context);
CFRelease(context);
CGImageRef image = NULL;
if (nsimage != nil)
{
NSSize imageSize = [nsimage size];
CGColorSpaceRef genericRGB = CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB);
CGContextRef context = CGBitmapContextCreate(NULL, imageSize.width, imageSize.height, 8, 0, genericRGB, kCGImageAlphaPremultipliedFirst);
NSGraphicsContext *nsGraphicsContext = [NSGraphicsContext graphicsContextWithGraphicsPort:context flipped:NO];
[NSGraphicsContext saveGraphicsState];
[NSGraphicsContext setCurrentContext:nsGraphicsContext];
[[NSColor whiteColor] setFill];
NSRectFill(NSMakeRect(0.0, 0.0, imageSize.width, imageSize.height));
[nsimage drawAtPoint:NSZeroPoint fromRect:NSZeroRect operation:NSCompositeCopy fraction:1.0];
[NSGraphicsContext setCurrentContext:nsGraphicsContext];
image = CGBitmapContextCreateImage(context);
CFRelease(context);
}
return image;
}