OpenGL_Internal.h

/*

===== IMPORTANT =====

This is sample code demonstrating API, technology or techniques in development.
Although this sample code has been reviewed for technical accuracy, it is not
final. Apple is supplying this information to help you plan for the adoption of
the technologies and programming interfaces described herein. This information
is subject to change, and software implemented based on this sample code should
be tested with final operating system software and final documentation. Newer
versions of this sample code may be provided with future seeds of the API or
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documentation, view the New & Updated sidebars in subsequent documentation
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=====================

File: OpenGL_Internal.h
Abstract: This file is included for support purposes and isn't necessary for
understanding this sample.

Version: 1.0

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*/

/* Degrees / Radians conversion */
#define DEGREES_TO_RADIANS(__ANGLE__) ((__ANGLE__) / 180.0 * M_PI)
#define RADIANS_TO_DEGREES(__ANGLE__) ((__ANGLE__) / M_PI * 180.0)

/* Generic error reporting */
#define REPORT_ERROR(__FORMAT__, ...) printf("%s: %s\n", __FUNCTION__, [[NSString stringWithFormat:__FORMAT__, __VA_ARGS__] UTF8String])

/* EAGL and GL functions calling wrappers that log on error */
#define CALL_EAGL_FUNCTION(__FUNC__, ...) ({ EAGLError __error = __FUNC__( __VA_ARGS__ ); if(__error != kEAGLErrorSuccess) printf("%s() called from %s returned error %i\n", #__FUNC__, __FUNCTION__, __error); (__error ? NO : YES); })
#define CHECK_GL_ERROR() ({ GLenum __error = glGetError(); if(__error) printf("OpenGL error 0x%04X in %s\n", __error, __FUNCTION__); (__error ? NO : YES); })

/* Optional delegate methods support */
#ifndef __DELEGATE_IVAR__
#define __DELEGATE_IVAR__ _delegate
#endif
#ifndef __DELEGATE_METHODS_IVAR__
#define __DELEGATE_METHODS_IVAR__ _delegateMethods
#endif
#define TEST_DELEGATE_METHOD_BIT(__BIT__) (self->__DELEGATE_METHODS_IVAR__ & (1 << __BIT__))
#define SET_DELEGATE_METHOD_BIT(__BIT__, __NAME__) { if([self->__DELEGATE_IVAR__ respondsToSelector:@selector(__NAME__)]) self->__DELEGATE_METHODS_IVAR__ |= (1 << __BIT__); else self->__DELEGATE_METHODS_IVAR__ &= ~(1 << __BIT__); }