gl.cxx

#include "gl.h"
#include <iostream>
 
namespace cgv {
    namespace render {
            namespace gl {
 
bool& ref_initialized()
{
    static bool is_initialized = false;
    return is_initialized;
}
 
bool is_glew_initialized()
{
    return ref_initialized();
}
 
bool ensure_glew_initialized()
{
    static bool called_init = false;
    static bool result;
    if (!called_init) {
        GLenum err = glewInit();
        result = err == GLEW_OK;
        if (!result) {
            std::cerr << "GLEW init error: " << 
                glewGetErrorString(err) << std::endl;
        }
        else {
            ref_initialized() = true;
            called_init = true;
        }
    }
    return result;
}
 
        }
    }
}
 
#ifdef REGISTER_SHADER_FILES
#include <cgv/base/register.h>
#include <cgv_gl_shader_inc.h>
#endif