/////////////////////////////////////////////////////////////////////////////
// Name:        glcanvas.h
// Purpose:     wxGLCanvas, for using OpenGL with wxWidgets 2.0 for Motif.
//              Uses the GLX extension.
// Author:      Julian Smart and Wolfram Gloger
// Modified by:
// Created:     1995, 1999
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart, Wolfram Gloger
// Licence:   	wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifndef _WX_GLCANVAS_H_
#define _WX_GLCANVAS_H_

#include "wx/setup.h"

#if wxUSE_GLCANVAS

#include "wx/gdicmn.h"
#include "wx/palette.h"
#include "wx/scrolwin.h"

#include <GL/glx.h>

enum
{
    WX_GL_RGBA=1,          /* use true color palette */
        WX_GL_BUFFER_SIZE,     /* bits for buffer if not WX_GL_RGBA */
        WX_GL_LEVEL,           /* 0 for main buffer, >0 for overlay, <0 for underlay */
        WX_GL_DOUBLEBUFFER,    /* use doublebuffer */
        WX_GL_STEREO,          /* use stereoscopic display */
        WX_GL_AUX_BUFFERS,     /* number of auxiliary buffers */
        WX_GL_MIN_RED,         /* use red buffer with most bits (> MIN_RED bits) */
        WX_GL_MIN_GREEN,       /* use green buffer with most bits (> MIN_GREEN bits) */
        WX_GL_MIN_BLUE,        /* use blue buffer with most bits (> MIN_BLUE bits) */
        WX_GL_MIN_ALPHA,       /* use blue buffer with most bits (> MIN_ALPHA bits) */
        WX_GL_DEPTH_SIZE,      /* bits for Z-buffer (0,16,32) */
        WX_GL_STENCIL_SIZE,    /* bits for stencil buffer */
        WX_GL_MIN_ACCUM_RED,   /* use red accum buffer with most bits (> MIN_ACCUM_RED bits) */
        WX_GL_MIN_ACCUM_GREEN, /* use green buffer with most bits (> MIN_ACCUM_GREEN bits) */
        WX_GL_MIN_ACCUM_BLUE,  /* use blue buffer with most bits (> MIN_ACCUM_BLUE bits) */
        WX_GL_MIN_ACCUM_ALPHA  /* use blue buffer with most bits (> MIN_ACCUM_ALPHA bits) */
};

//---------------------------------------------------------------------------
// classes
//---------------------------------------------------------------------------


class WXDLLEXPORT wxGLContext: public wxObject
{
public:
    wxGLContext( bool isRGB, wxWindow *win, 
        const wxPalette& palette = wxNullPalette );
    wxGLContext( bool WXUNUSED(isRGB), wxWindow *win, 
        const wxPalette& WXUNUSED(palette),
        const wxGLContext *other  /* for sharing display lists */
        );
    ~wxGLContext();
    
    void SetCurrent();
    void SetColour(const wxChar *colour);
    void SwapBuffers();
    
    void SetupPixelFormat();
    void SetupPalette(const wxPalette& palette);
    wxPalette CreateDefaultPalette();
    
    inline wxPalette* GetPalette() const { return (wxPalette*) & m_palette; }
    inline wxWindow* GetWindow() const { return m_window; }
    // inline GtkWidget* GetWidget() const { return m_widget; }
    inline GLXContext GetContext() const { return m_glContext; }
    
public:
    GLXContext       m_glContext;
    
    // GtkWidget       *m_widget;
    wxPalette        m_palette;
    wxWindow*        m_window;
    
    DECLARE_CLASS(wxGLContext)
};


class WXDLLEXPORT wxGLCanvas: public wxScrolledWindow
{
public:
    inline wxGLCanvas() {
        m_glContext = (wxGLContext*) NULL;
        m_sharedContext = (wxGLContext*) NULL;
        // m_glWidget = (GtkWidget*) NULL;
        m_vi = (void*) NULL;
        // m_exposed = FALSE;
    }
    wxGLCanvas( wxWindow *parent, wxWindowID id = -1, 
        const wxPoint& pos = wxDefaultPosition,
        const wxSize& size = wxDefaultSize, 
        long style = 0, const wxString& name = wxT("GLCanvas"), 
        int *attribList = (int*) NULL, 
        const wxPalette& palette = wxNullPalette );
    wxGLCanvas( wxWindow *parent, const wxGLContext *shared,
        wxWindowID id = -1, 
        const wxPoint& pos = wxDefaultPosition,
        const wxSize& size = wxDefaultSize, 
        long style = 0, const wxString& name = wxT("GLCanvas"), 
        int *attribList = (int*) NULL, 
        const wxPalette& palette = wxNullPalette );
    wxGLCanvas( wxWindow *parent, const wxGLCanvas *shared,
        wxWindowID id = -1, 
        const wxPoint& pos = wxDefaultPosition,
        const wxSize& size = wxDefaultSize, 
        long style = 0, const wxString& name = wxT("GLCanvas"), 
        int *attribList = (int*) NULL, 
        const wxPalette& palette = wxNullPalette );
    
    bool Create( wxWindow *parent, 
        const wxGLContext *shared = (wxGLContext*)NULL,
        const wxGLCanvas *shared_context_of = (wxGLCanvas*)NULL,
        wxWindowID id = -1, 
        const wxPoint& pos = wxDefaultPosition,
        const wxSize& size = wxDefaultSize, 
        long style = 0, const wxString& name = wxT("GLCanvas"), 
        int *attribList = (int*) NULL,
        const wxPalette& palette = wxNullPalette );
    
    ~wxGLCanvas();
    
    void SetCurrent();
    void SetColour(const wxChar *colour);
    void SwapBuffers();
    
    // void OnSize(wxSizeEvent& event);
    
    // void OnInternalIdle();
    
    inline wxGLContext* GetContext() const { return m_glContext; } 
    
    // implementation
    
    wxGLContext      *m_glContext,
        *m_sharedContext;
    wxGLCanvas       *m_sharedContextOf;
    void             *m_vi;
    // GtkWidget        *m_glWidget;
    // bool              m_exposed;
    
    DECLARE_EVENT_TABLE()
        DECLARE_CLASS(wxGLCanvas)
        
};

#endif
//  wxUSE_GLCANVAS

#endif
// _WX_GLCANVAS_H_