gl.h

glew.h

gl.h included before glew.h

如果包含了glew，就不用再包含gl.h

包含的地方

• cocos/cocos2d.h
• cocos/platform/CCGL.h

• CCGL-win32.h

#ifndef __CCGL_H__
#define __CCGL_H__

#include "platform/CCPlatformConfig.h"
#if CC_TARGET_PLATFORM == CC_PLATFORM_WIN32

#include "GL/glew.h"

#define CC_GL_DEPTH24_STENCIL8      GL_DEPTH24_STENCIL8

#endif // CC_TARGET_PLATFORM == CC_PLATFORM_WIN32

#endif // __CCGL_H__

• glew.h

#if defined(__gl_h_) || defined(__GL_H__) || defined(__X_GL_H)
#error gl.h included before glew.h
#endif
#if defined(__glext_h_) || defined(__GLEXT_H_)
#error glext.h included before glew.h
#endif
#if defined(__gl_ATI_h_)
#error glATI.h included before glew.h
#endif

最终解决办法

#include <qsize.h>

// 对顺序有要求
#ifdef Q_OS_WIN
#include "cocos2d.h"
#include <qopenglwidget.h>
#include <qopenglfunctions.h>
#include <qopenglextrafunctions.h>
#else
// todo 验证mac
#include <qopenglwidget.h>
#include <qopenglfunctions.h>
#include <qopenglextrafunctions.h>
#include "cocos2d.h"
#endif

#include <qsize.h>是一个无关的头文件，在引入后续OpenGL相关头文件的时候，必须有引入一个头文件，否则也会报错，所以我就随便写了一个无关的头文件，具体原因为啥，我也不清楚