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#import <Foundation/Foundation.h>
#define TESTCLASS_SINGLETON_FOR_CLASS(classname, accessorname) \
static classname *shared##classname = nil;
#define PUSH_CONTEXT(contextArg) \
EAGLContext *oldContext = [EAGLContext currentContext]; \
if (oldContext != contextArg) { \
[EAGLContext setCurrentContext:contextArg]; \
}
#define POP_CONTEXT(contextArg) \
if (oldContext != contextArg) { \
[EAGLContext setCurrentContext:oldContext]; \
}
#define CURRENT_CONTEXT \
NSOpenGLContext *currentContext = [NSOpenGLContext currentContext];
@interface TestClass : NSObject
@end
@implementation TestClass
TESTCLASS_SINGLETON_FOR_CLASS(TestClass, sharedInstance);
- (void) drawSomething {
PUSH_CONTEXT(_context);
POP_CONTEXT(_context);
}
@end
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