fixed wxOverlay to handle wxWindowDC/wxClientDC in the same way wxMac does

[wxWidgets.git] / src / msw / glcanvas.cpp

diff --git a/src/msw/glcanvas.cpp b/src/msw/glcanvas.cpp
index 44ac48b0b96939d6e5879cb90a5238449719e8d7..64f90c4ef2dda749159fbed40f9fbf21aa541377 100644 (file)
--- a/src/msw/glcanvas.cpp
+++ b/src/msw/glcanvas.cpp
@@ -1,6 +1,6 @@
 /////////////////////////////////////////////////////////////////////////////
 // Name:        src/msw/glcanvas.cpp
 /////////////////////////////////////////////////////////////////////////////
 // Name:        src/msw/glcanvas.cpp

-// Purpose:     wxGLCanvas, for using OpenGL with wxWindows under MS Windows
+// Purpose:     wxGLCanvas, for using OpenGL with wxWidgets under MS Windows

 // Author:      Julian Smart
 // Modified by:
 // Created:     04/01/98
 // Author:      Julian Smart
 // Modified by:
 // Created:     04/01/98


@@ -9,14 +9,10 @@
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 

-#ifdef __GNUG__
-#pragma implementation "glcanvas.h"
-#endif
-

 #include "wx/wxprec.h"
 
 #if defined(__BORLANDC__)
 #include "wx/wxprec.h"
 
 #if defined(__BORLANDC__)

-#pragma hdrstop
+    #pragma hdrstop

 #endif
 
 #if wxUSE_GLCANVAS
 #endif
 
 #if wxUSE_GLCANVAS


@@ -26,97 +22,187 @@
     #include "wx/settings.h"
     #include "wx/intl.h"
     #include "wx/log.h"
     #include "wx/settings.h"
     #include "wx/intl.h"
     #include "wx/log.h"

+    #include "wx/app.h"
+    #include "wx/module.h"

 #endif
 
 #include "wx/msw/private.h"
 
 #endif
 
 #include "wx/msw/private.h"
 

+// DLL options compatibility check:
+#include "wx/build.h"
+WX_CHECK_BUILD_OPTIONS("wxGL")
+

 #include "wx/glcanvas.h"
 
 #include "wx/glcanvas.h"
 

+#if GL_EXT_vertex_array
+    #define WXUNUSED_WITHOUT_GL_EXT_vertex_array(name) name
+#else
+    #define WXUNUSED_WITHOUT_GL_EXT_vertex_array(name) WXUNUSED(name)
+#endif
+
+/*
+  The following two compiler directives are specific to the Microsoft Visual
+  C++ family of compilers
+
+  Fundementally what they do is instruct the linker to use these two libraries
+  for the resolution of symbols. In essence, this is the equivalent of adding
+  these two libraries to either the Makefile or project file.
+
+  This is NOT a recommended technique, and certainly is unlikely to be used
+  anywhere else in wxWidgets given it is so specific to not only wxMSW, but
+  also the VC compiler. However, in the case of opengl support, it's an
+  applicable technique as opengl is optional in setup.h This code (wrapped by
+  wxUSE_GLCANVAS), now allows opengl support to be added purely by modifying
+  setup.h rather than by having to modify either the project or DSP fle.
+
+  See MSDN for further information on the exact usage of these commands.
+*/
+#ifdef _MSC_VER
+#  pragma comment( lib, "opengl32" )
+#  pragma comment( lib, "glu32" )
+#endif
+
+

 static const wxChar *wxGLCanvasClassName = wxT("wxGLCanvasClass");
 static const wxChar *wxGLCanvasClassNameNoRedraw = wxT("wxGLCanvasClassNR");
 
 LRESULT WXDLLEXPORT APIENTRY _EXPORT wxWndProc(HWND hWnd, UINT message,
                                    WPARAM wParam, LPARAM lParam);
 
 static const wxChar *wxGLCanvasClassName = wxT("wxGLCanvasClass");
 static const wxChar *wxGLCanvasClassNameNoRedraw = wxT("wxGLCanvasClassNR");
 
 LRESULT WXDLLEXPORT APIENTRY _EXPORT wxWndProc(HWND hWnd, UINT message,
                                    WPARAM wParam, LPARAM lParam);
 

-/*
- * GLContext implementation
- */
+// ----------------------------------------------------------------------------
+// wxGLModule is responsible for unregistering wxGLCanvasClass Windows class
+// ----------------------------------------------------------------------------

 
 

-wxGLContext::wxGLContext(bool isRGB, wxGLCanvas *win, const wxPalette& palette)
+class wxGLModule : public wxModule

 {
 {

-  m_window = win;
+public:
+    bool OnInit() { return true; }
+    void OnExit() { UnregisterClasses(); }

 
 

-  m_hDC = win->GetHDC();
+    // register the GL classes if not done yet, return true if ok, false if
+    // registration failed
+    static bool RegisterClasses();

 
 

-  m_glContext = wglCreateContext((HDC) m_hDC);
-  wxCHECK_RET( m_glContext, wxT("Couldn't create OpenGl context") );
+    // unregister the classes, done automatically on program termination
+    static void UnregisterClasses();

 
 

-  wglMakeCurrent((HDC) m_hDC, m_glContext);
-}
+private:
+    // wxGLCanvas is only used from the main thread so this is MT-ok
+    static bool ms_registeredGLClasses;
+
+    DECLARE_DYNAMIC_CLASS(wxGLModule)
+};
+
+IMPLEMENT_DYNAMIC_CLASS(wxGLModule, wxModule)
+
+bool wxGLModule::ms_registeredGLClasses = false;

 
 

-wxGLContext::wxGLContext(
-               bool isRGB, wxGLCanvas *win,
-               const wxPalette& palette,
-               const wxGLContext *other  /* for sharing display lists */
-             )
+/* static */
+bool wxGLModule::RegisterClasses()

 {
 {

-  m_window = win;
+    if (ms_registeredGLClasses)
+        return true;

 
 

-  m_hDC = win->GetHDC();
+    // We have to register a special window class because we need the CS_OWNDC
+    // style for GLCanvas.

 
 

-  m_glContext = wglCreateContext((HDC) m_hDC);
-  wxCHECK_RET( m_glContext, wxT("Couldn't create OpenGl context") );
+  /*
+  From Angel Popov <jumpo@bitex.com>

 
 

-  if( other != 0 )
-    wglShareLists( other->m_glContext, m_glContext );
+  Here are two snips from a dicussion in the OpenGL Gamedev list that explains
+  how this problem can be fixed:
+
+  "There are 5 common DCs available in Win95. These are aquired when you call
+  GetDC or GetDCEx from a window that does _not_ have the OWNDC flag.
+  OWNDC flagged windows do not get their DC from the common DC pool, the issue
+  is they require 800 bytes each from the limited 64Kb local heap for GDI."
+
+  "The deal is, if you hold onto one of the 5 shared DC's too long (as GL apps
+  do), Win95 will actually "steal" it from you.  MakeCurrent fails,
+  apparently, because Windows re-assigns the HDC to a different window.  The
+  only way to prevent this, the only reliable means, is to set CS_OWNDC."
+  */
+
+    WNDCLASS wndclass;
+
+    // the fields which are common to all classes
+    wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
+    wndclass.cbClsExtra    = 0;
+    wndclass.cbWndExtra    = sizeof( DWORD ); // VZ: what is this DWORD used for?
+    wndclass.hInstance     = wxhInstance;
+    wndclass.hIcon         = (HICON) NULL;
+    wndclass.hCursor       = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW);
+    wndclass.lpszMenuName  = NULL;
+
+    // Register the GLCanvas class name
+    wndclass.hbrBackground = (HBRUSH)NULL;
+    wndclass.lpszClassName = wxGLCanvasClassName;
+    wndclass.style         = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS | CS_OWNDC;
+
+    if ( !::RegisterClass(&wndclass) )
+    {
+        wxLogLastError(wxT("RegisterClass(wxGLCanvasClass)"));
+        return false;
+    }
+
+    // Register the GLCanvas class name for windows which don't do full repaint
+    // on resize
+    wndclass.lpszClassName = wxGLCanvasClassNameNoRedraw;
+    wndclass.style        &= ~(CS_HREDRAW | CS_VREDRAW);
+
+    if ( !::RegisterClass(&wndclass) )
+    {
+        wxLogLastError(wxT("RegisterClass(wxGLCanvasClassNameNoRedraw)"));
+
+        ::UnregisterClass(wxGLCanvasClassName, wxhInstance);

 
 

-  wglMakeCurrent((HDC) m_hDC, m_glContext);
+        return false;
+    }
+
+    ms_registeredGLClasses = true;
+
+    return true;

 }
 
 }
 

-wxGLContext::~wxGLContext()
+/* static */
+void wxGLModule::UnregisterClasses()

 {
 {

-  if (m_glContext)
-  {
-    wglMakeCurrent(NULL, NULL);
-    wglDeleteContext(m_glContext);
-  }
+    // we need to unregister the classes in case we're in a DLL which is
+    // unloaded and then loaded again because if we don't, the registration is
+    // going to fail in wxGLCanvas::Create() the next time we're loaded
+    if ( ms_registeredGLClasses )
+    {
+        ::UnregisterClass(wxGLCanvasClassName, wxhInstance);
+        ::UnregisterClass(wxGLCanvasClassNameNoRedraw, wxhInstance);
+
+        ms_registeredGLClasses = false;
+    }

 }
 
 }
 

-void wxGLContext::SwapBuffers()
+/*
+ * GLContext implementation
+ */
+
+IMPLEMENT_CLASS(wxGLContext, wxObject)
+
+wxGLContext::wxGLContext(wxGLCanvas* win, const wxGLContext* other /* for sharing display lists */)

 {
 {

-  if (m_glContext)
-  {
-    wglMakeCurrent((HDC) m_hDC, m_glContext);
-    ::SwapBuffers((HDC) m_hDC);    //blits the backbuffer into DC
-  }
+  m_glContext = wglCreateContext((HDC) win->GetHDC());
+  wxCHECK_RET( m_glContext, wxT("Couldn't create OpenGL context") );
+
+  if( other != 0 )
+    wglShareLists( other->m_glContext, m_glContext );

 }
 
 }
 

-void wxGLContext::SetCurrent()
+wxGLContext::~wxGLContext()

 {
 {

-  if (m_glContext)
-  {
-    wglMakeCurrent((HDC) m_hDC, m_glContext);
-  }
-
-  /*
-  setupPixelFormat(hDC);
-  setupPalette(hDC);
-  */
+    // If this context happens to be the current context, wglDeleteContext() makes it un-current first.
+    wglDeleteContext(m_glContext);

 }
 
 }
 

-void wxGLContext::SetColour(const wxChar *colour)
+void wxGLContext::SetCurrent(const wxGLCanvas& win) const

 {
 {

-  float r = 0.0;
-  float g = 0.0;
-  float b = 0.0;
-  wxColour *col = wxTheColourDatabase->FindColour(colour);
-  if (col)
-  {
-    r = (float)(col->Red()/256.0);
-    g = (float)(col->Green()/256.0);
-    b = (float)(col->Blue()/256.0);
-    glColor3f( r, g, b);
-  }
+    wglMakeCurrent((HDC) win.GetHDC(), m_glContext);

 }
 
 
 }
 
 


@@ -132,6 +218,26 @@ BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow)
     EVT_QUERY_NEW_PALETTE(wxGLCanvas::OnQueryNewPalette)
 END_EVENT_TABLE()
 
     EVT_QUERY_NEW_PALETTE(wxGLCanvas::OnQueryNewPalette)
 END_EVENT_TABLE()
 

+wxGLCanvas::wxGLCanvas(wxWindow *parent, wxWindowID id, int *attribList,
+    const wxPoint& pos, const wxSize& size, long style,
+    const wxString& name, const wxPalette& palette) : wxWindow()
+{
+    m_glContext = NULL;
+
+    if (Create(parent, id, pos, size, style, name))
+    {
+        SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
+    }
+
+    m_hDC = (WXHDC) ::GetDC((HWND) GetHWND());
+
+    SetupPixelFormat(attribList);
+    SetupPalette(palette);
+
+    // This ctor does *not* create an instance of wxGLContext,
+    // m_glContext intentionally remains NULL.
+}
+

 wxGLCanvas::wxGLCanvas(wxWindow *parent, wxWindowID id,
     const wxPoint& pos, const wxSize& size, long style, const wxString& name,
     int *attribList, const wxPalette& palette) : wxWindow()
 wxGLCanvas::wxGLCanvas(wxWindow *parent, wxWindowID id,
     const wxPoint& pos, const wxSize& size, long style, const wxString& name,
     int *attribList, const wxPalette& palette) : wxWindow()


@@ -143,7 +249,6 @@ wxGLCanvas::wxGLCanvas(wxWindow *parent, wxWindowID id,
   if ( ret )
   {
     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
   if ( ret )
   {
     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));

-    SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));

   }
 
   m_hDC = (WXHDC) ::GetDC((HWND) GetHWND());
   }
 
   m_hDC = (WXHDC) ::GetDC((HWND) GetHWND());


@@ -151,7 +256,7 @@ wxGLCanvas::wxGLCanvas(wxWindow *parent, wxWindowID id,
   SetupPixelFormat(attribList);
   SetupPalette(palette);
 
   SetupPixelFormat(attribList);
   SetupPalette(palette);
 

-  m_glContext = new wxGLContext(TRUE, this, palette);
+  m_glContext = new wxGLContext(this);

 }
 
 wxGLCanvas::wxGLCanvas( wxWindow *parent,
 }
 
 wxGLCanvas::wxGLCanvas( wxWindow *parent,


@@ -167,7 +272,6 @@ wxGLCanvas::wxGLCanvas( wxWindow *parent,
   if ( ret )
   {
     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
   if ( ret )
   {
     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));

-    SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));

   }
 
   m_hDC = (WXHDC) ::GetDC((HWND) GetHWND());
   }
 
   m_hDC = (WXHDC) ::GetDC((HWND) GetHWND());


@@ -175,7 +279,7 @@ wxGLCanvas::wxGLCanvas( wxWindow *parent,
   SetupPixelFormat(attribList);
   SetupPalette(palette);
 
   SetupPixelFormat(attribList);
   SetupPalette(palette);
 

-  m_glContext = new wxGLContext(TRUE, this, palette, shared );
+  m_glContext = new wxGLContext(this, shared);

 }
 
 // Not very useful for wxMSW, but this is to be wxGTK compliant
 }
 
 // Not very useful for wxMSW, but this is to be wxGTK compliant


@@ -192,7 +296,6 @@ wxGLCanvas::wxGLCanvas( wxWindow *parent, const wxGLCanvas *shared, wxWindowID i
   if ( ret )
   {
     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
   if ( ret )
   {
     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));

-    SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));

   }
 
   m_hDC = (WXHDC) ::GetDC((HWND) GetHWND());
   }
 
   m_hDC = (WXHDC) ::GetDC((HWND) GetHWND());


@@ -202,13 +305,12 @@ wxGLCanvas::wxGLCanvas( wxWindow *parent, const wxGLCanvas *shared, wxWindowID i
 
   wxGLContext *sharedContext=0;
   if (shared) sharedContext=shared->GetContext();
 
   wxGLContext *sharedContext=0;
   if (shared) sharedContext=shared->GetContext();

-  m_glContext = new wxGLContext(TRUE, this, palette, sharedContext );
+  m_glContext = new wxGLContext(this, sharedContext);

 }
 
 wxGLCanvas::~wxGLCanvas()
 {
 }
 
 wxGLCanvas::~wxGLCanvas()
 {

-  if (m_glContext)
-    delete m_glContext;
+  delete m_glContext;

 
   ::ReleaseDC((HWND) GetHWND(), (HDC) m_hDC);
 }
 
   ::ReleaseDC((HWND) GetHWND(), (HDC) m_hDC);
 }


@@ -222,103 +324,34 @@ bool wxGLCanvas::Create(wxWindow *parent,
                         long style,
                         const wxString& name)
 {
                         long style,
                         const wxString& name)
 {

-  static bool s_registeredGLCanvasClass = FALSE;
-
-  // We have to register a special window class because we need
-  // the CS_OWNDC style for GLCanvas.
-
-  /*
-  From Angel Popov <jumpo@bitex.com>
-
-  Here are two snips from a dicussion in the OpenGL Gamedev list that explains
-  how this problem can be fixed:
-
-  "There are 5 common DCs available in Win95. These are aquired when you call
-  GetDC or GetDCEx from a window that does _not_ have the OWNDC flag.
-  OWNDC flagged windows do not get their DC from the common DC pool, the issue
-  is they require 800 bytes each from the limited 64Kb local heap for GDI."
-
-  "The deal is, if you hold onto one of the 5 shared DC's too long (as GL apps
-  do), Win95 will actually "steal" it from you.  MakeCurrent fails,
-  apparently, because Windows re-assigns the HDC to a different window.  The
-  only way to prevent this, the only reliable means, is to set CS_OWNDC."
-  */
-
-  if (!s_registeredGLCanvasClass)
-  {
-    WNDCLASS wndclass;
+    wxCHECK_MSG( parent, false, wxT("can't create wxWindow without parent") );

 
 

-    // the fields which are common to all classes
-    wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
-    wndclass.cbClsExtra    = 0;
-    wndclass.cbWndExtra    = sizeof( DWORD ); // VZ: what is this DWORD used for?
-    wndclass.hInstance     = wxhInstance;
-    wndclass.hIcon         = (HICON) NULL;
-    wndclass.hCursor       = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW);
-    wndclass.lpszMenuName  = NULL;
-
-    // Register the GLCanvas class name
-    wndclass.hbrBackground = (HBRUSH)NULL;
-    wndclass.lpszClassName = wxGLCanvasClassName;
-    wndclass.style         = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS | CS_OWNDC;
-
-    if ( !::RegisterClass(&wndclass) )
-    {
-      wxLogLastError(wxT("RegisterClass(wxGLCanvasClass)"));
-      return FALSE;
-    }
-
-    // Register the GLCanvas class name for windows which don't do full repaint
-    // on resize
-    wndclass.lpszClassName = wxGLCanvasClassNameNoRedraw;
-    wndclass.style        &= ~(CS_HREDRAW | CS_VREDRAW);
-
-    if ( !::RegisterClass(&wndclass) )
+    if ( !wxGLModule::RegisterClasses() )

     {
     {

-        wxLogLastError(wxT("RegisterClass(wxGLCanvasClassNameNoRedraw)"));
-
-        ::UnregisterClass(wxGLCanvasClassName, wxhInstance);
+        wxLogError(_("Failed to register OpenGL window class."));

 
 

-        return FALSE;
+        return false;

     }
 
     }
 

-    s_registeredGLCanvasClass = TRUE;
-  }
-
-  wxCHECK_MSG( parent, FALSE, wxT("can't create wxWindow without parent") );
-
-  if ( !CreateBase(parent, id, pos, size, style, wxDefaultValidator, name) )
-    return FALSE;
-
-  parent->AddChild(this);
-
-  DWORD msflags = 0;
-  if ( style & wxBORDER )
-    msflags |= WS_BORDER;
-  if ( style & wxTHICK_FRAME )
-    msflags |= WS_THICKFRAME;
+    if ( !CreateBase(parent, id, pos, size, style, wxDefaultValidator, name) )
+        return false;

 
 

-  /*
-  A general rule with OpenGL and Win32 is that any window that will have a
-  HGLRC built for it must have two flags:  WS_CLIPCHILDREN & WS_CLIPSIBLINGS.
-  You can find references about this within the knowledge base and most OpenGL
-  books that contain the wgl function descriptions.
-  */
+    parent->AddChild(this);

 
 

-  msflags |= WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN;
+    DWORD msflags = 0;

 
 

-  bool want3D;
-  WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D);
+    /*
+       A general rule with OpenGL and Win32 is that any window that will have a
+       HGLRC built for it must have two flags:  WS_CLIPCHILDREN & WS_CLIPSIBLINGS.
+       You can find references about this within the knowledge base and most OpenGL
+       books that contain the wgl function descriptions.
+     */

 
 

-  // Even with extended styles, need to combine with WS_BORDER
-  // for them to look right.
-  if ( want3D || (m_windowStyle & wxSIMPLE_BORDER) || (m_windowStyle & wxRAISED_BORDER ) ||
-       (m_windowStyle & wxSUNKEN_BORDER) || (m_windowStyle & wxDOUBLE_BORDER))
-  {
-    msflags |= WS_BORDER;
-  }
+    WXDWORD exStyle = 0;
+    msflags |= WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN;
+    msflags |= MSWGetStyle(style, & exStyle) ;

 
 

-  return MSWCreate(wxGLCanvasClassName, NULL, pos, size, msflags, exStyle);
+    return MSWCreate(wxGLCanvasClassName, NULL, pos, size, msflags, exStyle);

 }
 
 static void AdjustPFDForAttributes(PIXELFORMATDESCRIPTOR& pfd, int *attribList)
 }
 
 static void AdjustPFDForAttributes(PIXELFORMATDESCRIPTOR& pfd, int *attribList)


@@ -337,7 +370,7 @@ static void AdjustPFDForAttributes(PIXELFORMATDESCRIPTOR& pfd, int *attribList)
           pfd.iPixelType = PFD_TYPE_RGBA;
           break;
         case WX_GL_BUFFER_SIZE:
           pfd.iPixelType = PFD_TYPE_RGBA;
           break;
         case WX_GL_BUFFER_SIZE:

-          pfd.cColorBits = attribList[arg++];
+          pfd.cColorBits = (BYTE)attribList[arg++];

           break;
         case WX_GL_LEVEL:
           // this member looks like it may be obsolete
           break;
         case WX_GL_LEVEL:
           // this member looks like it may be obsolete


@@ -357,38 +390,38 @@ static void AdjustPFDForAttributes(PIXELFORMATDESCRIPTOR& pfd, int *attribList)
           pfd.dwFlags |= PFD_STEREO;
           break;
         case WX_GL_AUX_BUFFERS:
           pfd.dwFlags |= PFD_STEREO;
           break;
         case WX_GL_AUX_BUFFERS:

-          pfd.cAuxBuffers = attribList[arg++];
+          pfd.cAuxBuffers = (BYTE)attribList[arg++];

           break;
         case WX_GL_MIN_RED:
           break;
         case WX_GL_MIN_RED:

-          pfd.cColorBits += (pfd.cRedBits = attribList[arg++]);
+          pfd.cColorBits = (BYTE)(pfd.cColorBits + (pfd.cRedBits = (BYTE)attribList[arg++]));

           break;
         case WX_GL_MIN_GREEN:
           break;
         case WX_GL_MIN_GREEN:

-          pfd.cColorBits += (pfd.cGreenBits = attribList[arg++]);
+          pfd.cColorBits = (BYTE)(pfd.cColorBits + (pfd.cGreenBits = (BYTE)attribList[arg++]));

           break;
         case WX_GL_MIN_BLUE:
           break;
         case WX_GL_MIN_BLUE:

-          pfd.cColorBits += (pfd.cBlueBits = attribList[arg++]);
+          pfd.cColorBits = (BYTE)(pfd.cColorBits + (pfd.cBlueBits = (BYTE)attribList[arg++]));

           break;
         case WX_GL_MIN_ALPHA:
           // doesn't count in cColorBits
           break;
         case WX_GL_MIN_ALPHA:
           // doesn't count in cColorBits

-          pfd.cAlphaBits = attribList[arg++];
+          pfd.cAlphaBits = (BYTE)attribList[arg++];

           break;
         case WX_GL_DEPTH_SIZE:
           break;
         case WX_GL_DEPTH_SIZE:

-          pfd.cDepthBits = attribList[arg++];
+          pfd.cDepthBits = (BYTE)attribList[arg++];

           break;
         case WX_GL_STENCIL_SIZE:
           break;
         case WX_GL_STENCIL_SIZE:

-          pfd.cStencilBits = attribList[arg++];
+          pfd.cStencilBits = (BYTE)attribList[arg++];

           break;
         case WX_GL_MIN_ACCUM_RED:
           break;
         case WX_GL_MIN_ACCUM_RED:

-          pfd.cAccumBits += (pfd.cAccumRedBits = attribList[arg++]);
+          pfd.cAccumBits = (BYTE)(pfd.cAccumBits + (pfd.cAccumRedBits = (BYTE)attribList[arg++]));

           break;
         case WX_GL_MIN_ACCUM_GREEN:
           break;
         case WX_GL_MIN_ACCUM_GREEN:

-          pfd.cAccumBits += (pfd.cAccumGreenBits = attribList[arg++]);
+          pfd.cAccumBits = (BYTE)(pfd.cAccumBits + (pfd.cAccumGreenBits = (BYTE)attribList[arg++]));

           break;
         case WX_GL_MIN_ACCUM_BLUE:
           break;
         case WX_GL_MIN_ACCUM_BLUE:

-          pfd.cAccumBits += (pfd.cAccumBlueBits = attribList[arg++]);
+          pfd.cAccumBits = (BYTE)(pfd.cAccumBits + (pfd.cAccumBlueBits = (BYTE)attribList[arg++]));

           break;
         case WX_GL_MIN_ACCUM_ALPHA:
           break;
         case WX_GL_MIN_ACCUM_ALPHA:

-          pfd.cAccumBits += (pfd.cAccumAlphaBits = attribList[arg++]);
+          pfd.cAccumBits = (BYTE)(pfd.cAccumBits + (pfd.cAccumAlphaBits = (BYTE)attribList[arg++]));

           break;
         default:
           break;
           break;
         default:
           break;


@@ -406,7 +439,7 @@ void wxGLCanvas::SetupPixelFormat(int *attribList) // (HDC hDC)
         PFD_DRAW_TO_WINDOW |
         PFD_DOUBLEBUFFER,        /* support double-buffering */
         PFD_TYPE_RGBA,            /* color type */
         PFD_DRAW_TO_WINDOW |
         PFD_DOUBLEBUFFER,        /* support double-buffering */
         PFD_TYPE_RGBA,            /* color type */

-        16,                /* prefered color depth */
+        16,                /* preferred color depth */

         0, 0, 0, 0, 0, 0,        /* color bits (ignored) */
         0,                /* no alpha buffer */
         0,                /* alpha bits (ignored) */
         0, 0, 0, 0, 0, 0,        /* color bits (ignored) */
         0,                /* no alpha buffer */
         0,                /* alpha bits (ignored) */


@@ -457,8 +490,8 @@ void wxGLCanvas::SetupPalette(const wxPalette& palette)
 
     if (m_palette.Ok())
     {
 
     if (m_palette.Ok())
     {

-        SelectPalette((HDC) m_hDC, (HPALETTE) m_palette.GetHPALETTE(), FALSE);
-        RealizePalette((HDC) m_hDC);
+        ::SelectPalette((HDC) m_hDC, (HPALETTE) m_palette.GetHPALETTE(), FALSE);
+        ::RealizePalette((HDC) m_hDC);

     }
 }
 
     }
 }
 


@@ -475,7 +508,7 @@ wxPalette wxGLCanvas::CreateDefaultPalette()
     LOGPALETTE* pPal =
      (LOGPALETTE*) malloc(sizeof(LOGPALETTE) + paletteSize * sizeof(PALETTEENTRY));
     pPal->palVersion = 0x300;
     LOGPALETTE* pPal =
      (LOGPALETTE*) malloc(sizeof(LOGPALETTE) + paletteSize * sizeof(PALETTEENTRY));
     pPal->palVersion = 0x300;

-    pPal->palNumEntries = paletteSize;
+    pPal->palNumEntries = (WORD)paletteSize;

 
     /* build a simple RGB color palette */
     {
 
     /* build a simple RGB color palette */
     {


@@ -486,11 +519,11 @@ wxPalette wxGLCanvas::CreateDefaultPalette()
 
     for (i=0; i<paletteSize; ++i) {
         pPal->palPalEntry[i].peRed =
 
     for (i=0; i<paletteSize; ++i) {
         pPal->palPalEntry[i].peRed =

-            (((i >> pfd.cRedShift) & redMask) * 255) / redMask;
+            (BYTE)((((i >> pfd.cRedShift) & redMask) * 255) / redMask);

         pPal->palPalEntry[i].peGreen =
         pPal->palPalEntry[i].peGreen =

-            (((i >> pfd.cGreenShift) & greenMask) * 255) / greenMask;
+            (BYTE)((((i >> pfd.cGreenShift) & greenMask) * 255) / greenMask);

         pPal->palPalEntry[i].peBlue =
         pPal->palPalEntry[i].peBlue =

-            (((i >> pfd.cBlueShift) & blueMask) * 255) / blueMask;
+            (BYTE)((((i >> pfd.cBlueShift) & blueMask) * 255) / blueMask);

         pPal->palPalEntry[i].peFlags = 0;
     }
     }
         pPal->palPalEntry[i].peFlags = 0;
     }
     }


@@ -506,26 +539,48 @@ wxPalette wxGLCanvas::CreateDefaultPalette()
 
 void wxGLCanvas::SwapBuffers()
 {
 
 void wxGLCanvas::SwapBuffers()
 {

-  if (m_glContext)
-    m_glContext->SwapBuffers();
+    ::SwapBuffers((HDC) m_hDC);
+}
+
+void wxGLCanvas::OnSize(wxSizeEvent& WXUNUSED(event))
+{

 }
 
 }
 

-void wxGLCanvas::OnSize(wxSizeEvent& event)
+void wxGLCanvas::SetCurrent(const wxGLContext& RC) const

 {
 {

+    // although on MSW it works even if the window is still hidden, it doesn't
+       // under wxGTK and documentation mentions that SetCurrent() can only be
+       // called for a shown window, so check it
+       wxASSERT_MSG( GetParent()->IsShown(), _T("can't make hidden GL canvas current") );
+
+    RC.SetCurrent(*this);

 }
 
 void wxGLCanvas::SetCurrent()
 {
 }
 
 void wxGLCanvas::SetCurrent()
 {

+  // although on MSW it works even if the window is still hidden, it doesn't
+  // under wxGTK and documentation mentions that SetCurrent() can only be
+  // called for a shown window, so check it
+  wxASSERT_MSG( GetParent()->IsShown(),
+                    _T("can't make hidden GL canvas current") );
+

   if (m_glContext)
   {
   if (m_glContext)
   {

-    m_glContext->SetCurrent();
+    m_glContext->SetCurrent(*this);

   }
 }
 
 void wxGLCanvas::SetColour(const wxChar *colour)
 {
   }
 }
 
 void wxGLCanvas::SetColour(const wxChar *colour)
 {

-  if (m_glContext)
-    m_glContext->SetColour(colour);
+    wxColour col = wxTheColourDatabase->Find(colour);
+
+    if (col.Ok())
+    {
+        float r = (float)(col.Red()/256.0);
+        float g = (float)(col.Green()/256.0);
+        float b = (float)(col.Blue()/256.0);
+        glColor3f( r, g, b);
+    }

 }
 
 // TODO: Have to have this called by parent frame (?)
 }
 
 // TODO: Have to have this called by parent frame (?)


@@ -538,10 +593,10 @@ void wxGLCanvas::OnQueryNewPalette(wxQueryNewPaletteEvent& event)
     ::SelectPalette((HDC) GetHDC(), (HPALETTE) GetPalette()->GetHPALETTE(), FALSE);
     ::RealizePalette((HDC) GetHDC());
     Refresh();
     ::SelectPalette((HDC) GetHDC(), (HPALETTE) GetPalette()->GetHPALETTE(), FALSE);
     ::RealizePalette((HDC) GetHDC());
     Refresh();

-    event.SetPaletteRealized(TRUE);
+    event.SetPaletteRealized(true);

   }
   else
   }
   else

-    event.SetPaletteRealized(FALSE);
+    event.SetPaletteRealized(false);

 }
 
 // I think this doesn't have to be propagated to child windows.
 }
 
 // I think this doesn't have to be propagated to child windows.


@@ -558,137 +613,6 @@ void wxGLCanvas::OnPaletteChanged(wxPaletteChangedEvent& event)
   }
 }
 
   }
 }
 

-/* Give extensions proper function names. */
-
-/* EXT_vertex_array */
-void glArrayElementEXT(GLint i)
-{
-}
-
-void glColorPointerEXT(GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
-{
-}
-
-void glDrawArraysEXT(GLenum mode, GLint first, GLsizei count)
-{
-#ifdef GL_EXT_vertex_array
-    static PFNGLDRAWARRAYSEXTPROC proc = 0;
-
-    if ( !proc )
-    {
-        proc = (PFNGLDRAWARRAYSEXTPROC) wglGetProcAddress("glDrawArraysEXT");
-    }
-
-    if ( proc )
-        (* proc) (mode, first, count);
-#endif
-}
-
-void glEdgeFlagPointerEXT(GLsizei stride, GLsizei count, const GLboolean *pointer)
-{
-}
-
-void glGetPointervEXT(GLenum pname, GLvoid* *params)
-{
-}
-
-void glIndexPointerEXT(GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
-{
-}
-
-void glNormalPointerEXT(GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
-{
-#ifdef GL_EXT_vertex_array
-  static PFNGLNORMALPOINTEREXTPROC proc = 0;
-
-  if ( !proc )
-  {
-    proc = (PFNGLNORMALPOINTEREXTPROC) wglGetProcAddress("glNormalPointerEXT");
-  }
-
-  if ( proc )
-    (* proc) (type, stride, count, pointer);
-#endif
-}
-
-void glTexCoordPointerEXT(GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
-{
-}
-
-void glVertexPointerEXT(GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
-{
-#ifdef GL_EXT_vertex_array
-  static PFNGLVERTEXPOINTEREXTPROC proc = 0;
-
-  if ( !proc )
-  {
-    proc = (PFNGLVERTEXPOINTEREXTPROC) wglGetProcAddress("glVertexPointerEXT");
-  }
-  if ( proc )
-    (* proc) (size, type, stride, count, pointer);
-#endif
-}
-
-/* EXT_color_subtable */
-void glColorSubtableEXT(GLenum target, GLsizei start, GLsizei count, GLenum format, GLenum type, const GLvoid *table)
-{
-}
-
-/* EXT_color_table */
-void glColorTableEXT(GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *table)
-{
-}
-
-void glCopyColorTableEXT(GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width)
-{
-}
-
-void glGetColorTableEXT(GLenum target, GLenum format, GLenum type, GLvoid *table)
-{
-}
-
-void glGetColorTableParamaterfvEXT(GLenum target, GLenum pname, GLfloat *params)
-{
-}
-
-void glGetColorTavleParameterivEXT(GLenum target, GLenum pname, GLint *params)
-{
-}
-
-/* SGI_compiled_vertex_array */
-void glLockArraysSGI(GLint first, GLsizei count)
-{
-}
-
-void glUnlockArraysSGI()
-{
-}
-
-
-/* SGI_cull_vertex */
-void glCullParameterdvSGI(GLenum pname, GLdouble* params)
-{
-}
-
-void glCullParameterfvSGI(GLenum pname, GLfloat* params)
-{
-}
-
-/* SGI_index_func */
-void glIndexFuncSGI(GLenum func, GLclampf ref)
-{
-}
-
-/* SGI_index_material */
-void glIndexMaterialSGI(GLenum face, GLenum mode)
-{
-}
-
-/* WIN_swap_hint */
-void glAddSwapHintRectWin(GLint x, GLint y, GLsizei width, GLsizei height)
-{
-}
-

 
 //---------------------------------------------------------------------------
 // wxGLApp
 
 //---------------------------------------------------------------------------
 // wxGLApp


@@ -706,7 +630,7 @@ bool wxGLApp::InitGLVisual(int *attribList)
         PFD_DRAW_TO_WINDOW |
         PFD_DOUBLEBUFFER,        /* support double-buffering */
         PFD_TYPE_RGBA,            /* color type */
         PFD_DRAW_TO_WINDOW |
         PFD_DOUBLEBUFFER,        /* support double-buffering */
         PFD_TYPE_RGBA,            /* color type */

-        16,                /* prefered color depth */
+        16,                /* preferred color depth */

         0, 0, 0, 0, 0, 0,        /* color bits (ignored) */
         0,                /* no alpha buffer */
         0,                /* alpha bits (ignored) */
         0, 0, 0, 0, 0, 0,        /* color bits (ignored) */
         0,                /* no alpha buffer */
         0,                /* alpha bits (ignored) */


@@ -727,10 +651,10 @@ bool wxGLApp::InitGLVisual(int *attribList)
 
   if (pixelFormat == 0) {
     wxLogError(_("Failed to initialize OpenGL"));
 
   if (pixelFormat == 0) {
     wxLogError(_("Failed to initialize OpenGL"));

-    return FALSE;
+    return false;

   }
 
   }
 

-  return TRUE;
+  return true;

 }
 
 wxGLApp::~wxGLApp()
 }
 
 wxGLApp::~wxGLApp()