GLEssentials/Source/Utility/glUtil.h
/* |
Copyright (C) 2015 Apple Inc. All Rights Reserved. |
See LICENSE.txt for this sample’s licensing information |
Abstract: |
Includes the appropriate OpenGL headers (depending on whether this |
is built for iOS or OSX) and provides some API utility functions. |
*/ |
#ifndef __GL_UTIL_H__ |
#define __GL_UTIL_H__ |
#if TARGET_IOS |
#import <OpenGLES/ES2/gl.h> |
#import <OpenGLES/ES2/glext.h> |
#else |
#import <OpenGL/OpenGL.h> |
// OpenGL 3.2 is only supported on MacOS X Lion and later |
// CGL_VERSION_1_3 is defined as 1 on MacOS X Lion and later |
#if CGL_VERSION_1_3 |
// Set to 0 to run on the Legacy OpenGL Profile |
#define ESSENTIAL_GL_PRACTICES_SUPPORT_GL3 1 |
#else |
#define ESSENTIAL_GL_PRACTICES_SUPPORT_GL3 0 |
#endif //!CGL_VERSION_1_3 |
#if ESSENTIAL_GL_PRACTICES_SUPPORT_GL3 |
#import <OpenGL/gl3.h> |
#else |
#import <OpenGL/gl.h> |
#endif //!ESSENTIAL_GL_PRACTICES_SUPPORT_GL3 |
#endif // !TARGET_IOS |
//The name of the VertexArrayObject are slightly different in |
// OpenGLES, OpenGL Core Profile, and OpenGL Legacy |
// The arguments are exactly the same across these APIs however |
#if TARGET_IOS |
#define glBindVertexArray glBindVertexArrayOES |
#define glGenVertexArrays glGenVertexArraysOES |
#define glDeleteVertexArrays glDeleteVertexArraysOES |
#else |
#if ESSENTIAL_GL_PRACTICES_SUPPORT_GL3 |
#define glBindVertexArray glBindVertexArray |
#define glGenVertexArrays glGenVertexArrays |
#define glGenerateMipmap glGenerateMipmap |
#define glDeleteVertexArrays glDeleteVertexArrays |
#else |
#define glBindVertexArray glBindVertexArrayAPPLE |
#define glGenVertexArrays glGenVertexArraysAPPLE |
#define glGenerateMipmap glGenerateMipmapEXT |
#define glDeleteVertexArrays glDeleteVertexArraysAPPLE |
#endif //!ESSENTIAL_GL_PRACTICES_SUPPORT_GL3 |
#endif //!TARGET_IOS |
static inline const char * GetGLErrorString(GLenum error) |
{ |
const char *str; |
switch( error ) |
{ |
case GL_NO_ERROR: |
str = "GL_NO_ERROR"; |
break; |
case GL_INVALID_ENUM: |
str = "GL_INVALID_ENUM"; |
break; |
case GL_INVALID_VALUE: |
str = "GL_INVALID_VALUE"; |
break; |
case GL_INVALID_OPERATION: |
str = "GL_INVALID_OPERATION"; |
break; |
#if defined __gl_h_ || defined __gl3_h_ |
case GL_OUT_OF_MEMORY: |
str = "GL_OUT_OF_MEMORY"; |
break; |
case GL_INVALID_FRAMEBUFFER_OPERATION: |
str = "GL_INVALID_FRAMEBUFFER_OPERATION"; |
break; |
#endif |
#if defined __gl_h_ |
case GL_STACK_OVERFLOW: |
str = "GL_STACK_OVERFLOW"; |
break; |
case GL_STACK_UNDERFLOW: |
str = "GL_STACK_UNDERFLOW"; |
break; |
case GL_TABLE_TOO_LARGE: |
str = "GL_TABLE_TOO_LARGE"; |
break; |
#endif |
default: |
str = "(ERROR: Unknown Error Enum)"; |
break; |
} |
return str; |
} |
#define GetGLError() \ |
{ \ |
GLenum err = glGetError(); \ |
while (err != GL_NO_ERROR) { \ |
NSLog(@"GLError %s set in File:%s Line:%d\n", \ |
GetGLErrorString(err), __FILE__, __LINE__); \ |
err = glGetError(); \ |
} \ |
} |
#endif // __GL_UTIL_H__ |
Copyright © 2015 Apple Inc. All Rights Reserved. Terms of Use | Privacy Policy | Updated: 2015-08-07