Refactor all code common to X11 OpenGL implementations into glx11.h/.cpp

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45486 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/unix/glx11.h

@@ -0,0 +1,162 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/unix/glx11.h
+// Purpose:     class common for all X11-based wxGLCanvas implementations
+// Author:      Vadim Zeitlin
+// Created:     2007-04-15
+// RCS-ID:      $Id$
+// Copyright:   (c) 2007 Vadim Zeitlin <vadim@wxwindows.org>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_UNIX_GLX11_H_
+#define _WX_UNIX_GLX11_H_
+
+#include <GL/glx.h>
+
+// ----------------------------------------------------------------------------
+// wxGLContext
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxGLContext : public wxGLContextBase
+{
+public:
+    wxGLContext(wxGLCanvas *win, const wxGLContext *other = NULL);
+    virtual ~wxGLContext();
+
+    virtual void SetCurrent(const wxGLCanvas& win) const;
+
+private:
+    // attach context to the drawable or unset it (if NULL)
+    static void MakeCurrent(GLXDrawable drawable, GLXContext context);
+
+    GLXContext m_glContext;
+
+    DECLARE_CLASS(wxGLContext)
+};
+
+// ----------------------------------------------------------------------------
+// wxGLCanvasX11
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxGLCanvasX11 : public wxGLCanvasBase
+{
+public:
+    // initialization and dtor
+    // -----------------------
+
+    // default ctor doesn't do anything, InitVisual() must be called
+    wxGLCanvasX11();
+
+    // initializes the XVisualInfo corresponding to the given attributes
+    bool InitVisual(const int *attribList);
+
+    // frees XVisualInfo info
+    virtual ~wxGLCanvasX11();
+
+
+    // implement wxGLCanvasBase methods
+    // --------------------------------
+
+    virtual void SwapBuffers();
+
+
+    // X11-specific methods
+    // --------------------
+
+    // return GLX version: 13 means 1.3 &c
+    static int GetGLXVersion();
+
+    // get the X11 handle of this window
+    virtual Window GetXWindow() const = 0;
+
+
+    // override some wxWindow methods
+    // ------------------------------
+
+    // return true only if the window is realized: OpenGL context can't be
+    // created until we are
+    virtual bool IsShownOnScreen() const;
+
+
+    // implementation only from now on
+    // -------------------------------
+
+    // get the GLXFBConfig/XVisualInfo we use
+    GLXFBConfig *GetGLXFBConfig() const { return m_fbc; }
+    XVisualInfo *GetXVisualInfo() const { return m_vi; }
+
+    // initialize the global default GL visual, return false if matching visual
+    // not found
+    static bool InitDefaultVisualInfo(const int *attribList);
+
+    // get the default GL X11 visual (may be NULL, shouldn't be freed by caller)
+    static XVisualInfo *GetDefaultXVisualInfo() { return ms_glVisualInfo; }
+
+    // free the global GL visual, called by wxGLApp
+    static void FreeDefaultVisualInfo();
+
+private:
+    // fills in glattrs with attributes defined by wxattrs which must be
+    // 0-terminated if it is non-NULL
+    //
+    // n is the max size of glattrs, false is returned if we overflow it, it
+    // should be at least 16 to accommodate the default attributes
+    static bool ConvertWXAttrsToGL(const int *wxattrs, int *glattrs, size_t n);
+
+    // initializes XVisualInfo (in any case) and, if supported, GLXFBConfig
+    //
+    // returns false if XVisualInfo couldn't be initialized, otherwise caller
+    // is responsible for freeing the pointers
+    static bool InitXVisualInfo(const int *attribList,
+                                GLXFBConfig **pFBC, XVisualInfo **pXVisual);
+
+
+    // this is only used if it's supported i.e. if GL >= 1.3
+    GLXFBConfig *m_fbc;
+
+    // used for all GL versions, obtained from GLXFBConfig for GL >= 1.3
+    XVisualInfo *m_vi;
+
+    // the global/default versions of the above
+    static GLXFBConfig *ms_glFBCInfo;
+    static XVisualInfo *ms_glVisualInfo;
+};
+
+// ----------------------------------------------------------------------------
+// wxGLApp
+// ----------------------------------------------------------------------------
+
+// this is used in wx/glcanvas.h, prevent it from defining a generic wxGLApp
+#define wxGL_APP_DEFINED
+
+class wxGLApp : public wxGLAppBase
+{
+public:
+    wxGLApp();
+
+    // implement wxGLAppBase method
+    virtual bool InitGLVisual(const int *attribList)
+    {
+        return wxGLCanvasX11::InitDefaultVisualInfo(attribList);
+    }
+
+    // and implement this wxGTK::wxApp method too
+    virtual void *GetXVisualInfo()
+    {
+        return wxGLCanvasX11::GetDefaultXVisualInfo();
+    }
+
+    // and override this wxApp method to clean up
+    virtual int OnExit()
+    {
+        wxGLCanvasX11::FreeDefaultVisualInfo();
+
+        return wxGLAppBase::OnExit();
+    }
+
+private:
+    DECLARE_DYNAMIC_CLASS(wxGLApp);
+};
+
+#endif // _WX_UNIX_GLX11_H_
+