GLXWindow.cpp

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#ifdef LINUX

#include <blort/GLWindow/GLWindow.h>
#include <stdio.h>
#include <stdexcept>
#include <vector>

namespace blortGLWindow{

void GLWindow::init(unsigned int width, unsigned int height, const char* name, bool visible){
        GLint att[] = { GLX_RGBA, GLX_DEPTH_SIZE, 24, GLX_DOUBLEBUFFER, None };
        dpy = XOpenDisplay(NULL);

        if(dpy == NULL){
                throw std::runtime_error("[GLWindow::init] Error cannot connect to X server");
        }
                                  
        root = DefaultRootWindow(dpy);
        vi = glXChooseVisual(dpy, 0, att);

        if(vi == NULL)
                throw std::runtime_error("[GLWindow::init] Error no appropriate visual found");

        cmap = XCreateColormap(dpy, root, vi->visual, AllocNone);

        swa.colormap = cmap;
        swa.event_mask = ExposureMask | KeyPressMask | KeyReleaseMask | ButtonPressMask | ButtonReleaseMask | PointerMotionMask;

        glWin = XCreateWindow(dpy, root, 0, 0, width, height, 0, vi->depth, InputOutput, vi->visual, CWColormap | CWEventMask, &swa);
        wmDelete = XInternAtom(dpy, "WM_DELETE_WINDOW", true);
        XSetWMProtocols(dpy, glWin, &wmDelete, 1);

  if ( visible )
    XMapWindow(dpy, glWin); //makes it visible

        XStoreName(dpy, glWin, name);

        glc = glXCreateContext(dpy, vi, NULL, GL_TRUE);
        glXMakeCurrent(dpy, glWin, glc);
        
        printf("OpenGL Version: %s\n", glGetString(GL_VERSION));

        glXSwapBuffers(dpy, glWin);
}

void GLWindow::quit(){
        glXMakeCurrent(dpy, None, NULL);
        glXDestroyContext(dpy, glc);
        XDestroyWindow(dpy, glWin);
        XCloseDisplay(dpy);
}

GLWindow::GLWindow(){
        init(320,240,"OpenGL Window");
}
GLWindow::GLWindow(unsigned int width, unsigned int height){
        init(width, height, "OpenGL Window");
}
GLWindow::GLWindow(unsigned int width, unsigned int height, const char* name, bool visible){
  init(width, height, name, visible);
}
GLWindow::~GLWindow(){
        quit();
}

void GLWindow::Activate(){
        glXMakeCurrent(dpy, glWin, glc);
}

void GLWindow::Update(){
        glXSwapBuffers(dpy, glWin);
}

} /* namespace */

#endif /* LINUX */