CheckError.hpp

//////////////////////////////////////////////////////////////////////////////
//
//  --- CheckError.h ---
//
//////////////////////////////////////////////////////////////////////////////

#ifndef __CHECKERROR_HPP__
#define __CHECKERROR_HPP__

#ifdef __APPLE__
#include <OpenGL/gl3.h>
#else
#include <GL/gl.h>
#endif

//----------------------------------------------------------------------------

static const char* ErrorString(GLenum error) {
    const char* msg;
    switch (error) {
#define Case(Token)   \
    case Token:       \
        msg = #Token; \
        break;
        Case(GL_NO_ERROR);
        Case(GL_INVALID_VALUE);
        Case(GL_INVALID_ENUM);
        Case(GL_INVALID_OPERATION);
#ifndef __gl3_h_  // In OpenGL 3.2 core profile, GL_STACK_OVERFLOW and
                  // GL_STACK_UNDERFLOW are Not defined and thus the following 2
                  // cases must be bypassed. So we check the two cases below
                  // only when it's NOT OpenGL 3.2 core profile,
        // i.e., only when "__gl3_h_" is not defined.
        Case(GL_STACK_OVERFLOW);
        Case(GL_STACK_UNDERFLOW);
#endif
        Case(GL_OUT_OF_MEMORY);
#undef Case
    }

    return msg;
}

//----------------------------------------------------------------------------

static void _CheckError(const char* file, int line) {
    GLenum error = glGetError();

    do {
        std::cerr << "[" << file << ":" << line << "] " << ErrorString(error)
                  << std::endl;
    } while ((error = glGetError()) != GL_NO_ERROR);
}

//----------------------------------------------------------------------------

#define CheckError() _CheckError(__FILE__, __LINE__)

//----------------------------------------------------------------------------

#endif  // !__CHECKERROR_HPP__