src/osx/glcanvas_osx.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/glcanvas_osx.cpp
   3 // Purpose:     wxGLCanvas, for using OpenGL with wxWidgets under Macintosh
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     1998-01-01
   7 // Copyright:   (c) Stefan Csomor
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 // ============================================================================
  12 // declarations
  13 // ============================================================================
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 #include "wx/wxprec.h"
  20
  21 #if defined(__BORLANDC__)
  22     #pragma hdrstop
  23 #endif
  24
  25 #if wxUSE_GLCANVAS
  26
  27 #include "wx/glcanvas.h"
  28
  29 #ifndef WX_PRECOMP
  30     #include "wx/frame.h"
  31     #include "wx/log.h"
  32     #include "wx/settings.h"
  33 #endif
  34
  35 #include "wx/osx/private.h"
  36
  37 // ----------------------------------------------------------------------------
  38 // wxGLCanvas
  39 // ----------------------------------------------------------------------------
  40
  41 wxGLContext::wxGLContext(wxGLCanvas *win, const wxGLContext *other)
  42 {
  43     m_glContext = WXGLCreateContext(win->GetWXGLPixelFormat(),
  44                                     other ? other->m_glContext : NULL);
  45 }
  46
  47 wxGLContext::~wxGLContext()
  48 {
  49     if ( m_glContext )
  50     {
  51         WXGLDestroyContext(m_glContext);
  52     }
  53 }
  54
  55 // ----------------------------------------------------------------------------
  56 // wxGLCanvas
  57 // ----------------------------------------------------------------------------
  58
  59 IMPLEMENT_CLASS(wxGLCanvas, wxWindow)
  60
  61 BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow)
  62 #if wxOSX_USE_CARBON
  63     EVT_SIZE(wxGLCanvas::OnSize)
  64 #endif
  65 END_EVENT_TABLE()
  66
  67 wxGLCanvas::wxGLCanvas(wxWindow *parent,
  68                        wxWindowID id,
  69                        const int *attribList,
  70                        const wxPoint& pos,
  71                        const wxSize& size,
  72                        long style,
  73                        const wxString& name,
  74                        const wxPalette& palette)
  75 {
  76     Create(parent, id, pos, size, style, name, attribList, palette);
  77 }
  78
  79 #if WXWIN_COMPATIBILITY_2_8
  80
  81 wxGLCanvas::wxGLCanvas(wxWindow *parent,
  82                        wxWindowID id,
  83                        const wxPoint& pos,
  84                        const wxSize& size,
  85                        long style,
  86                        const wxString& name,
  87                        const int *attribList,
  88                        const wxPalette& palette)
  89 {
  90     if ( Create(parent, id, pos, size, style, name, attribList, palette) )
  91         m_glContext = new wxGLContext(this);
  92 }
  93
  94 wxGLCanvas::wxGLCanvas(wxWindow *parent,
  95                        const wxGLContext *shared,
  96                        wxWindowID id,
  97                        const wxPoint& pos,
  98                        const wxSize& size,
  99                        long style,
 100                        const wxString& name,
 101                        const int *attribList,
 102                        const wxPalette& palette)
 103 {
 104     if ( Create(parent, id, pos, size, style, name, attribList, palette) )
 105         m_glContext = new wxGLContext(this, shared);
 106 }
 107
 108 wxGLCanvas::wxGLCanvas(wxWindow *parent,
 109                        const wxGLCanvas *shared,
 110                        wxWindowID id,
 111                        const wxPoint& pos,
 112                        const wxSize& size,
 113                        long style,
 114                        const wxString& name,
 115                        const int *attribList,
 116                        const wxPalette& palette)
 117 {
 118     if ( Create(parent, id, pos, size, style, name, attribList, palette) )
 119         m_glContext = new wxGLContext(this, shared ? shared->m_glContext : NULL);
 120 }
 121
 122 #endif // WXWIN_COMPATIBILITY_2_8
 123
 124 /* static */
 125 bool wxGLCanvas::IsAGLMultiSampleAvailable()
 126 {
 127     static int s_isMultiSampleAvailable = -1;
 128     if ( s_isMultiSampleAvailable == -1 )
 129         s_isMultiSampleAvailable = IsExtensionSupported("GL_ARB_multisample");
 130
 131     return s_isMultiSampleAvailable != 0;
 132 }
 133
 134 /* static */
 135 bool wxGLCanvasBase::IsDisplaySupported(const int *attribList)
 136 {
 137     WXGLPixelFormat glFormat = WXGLChoosePixelFormat(attribList);
 138
 139     if ( !glFormat )
 140        return false;
 141
 142     WXGLDestroyPixelFormat(glFormat);
 143
 144     return true;
 145 }
 146
 147 bool wxGLCanvasBase::IsExtensionSupported(const char *extension)
 148 {
 149     // we need a valid context to query for extensions.
 150     WXGLPixelFormat fmt = WXGLChoosePixelFormat(NULL);
 151     WXGLContext ctx = WXGLCreateContext(fmt, NULL);
 152     if ( !ctx )
 153         return false;
 154
 155     WXGLContext ctxOld = WXGLGetCurrentContext();
 156     WXGLSetCurrentContext(ctx);
 157
 158     wxString extensions = wxString::FromAscii(glGetString(GL_EXTENSIONS));
 159
 160     WXGLSetCurrentContext(ctxOld);
 161     WXGLDestroyPixelFormat(fmt);
 162     WXGLDestroyContext(ctx);
 163
 164     return IsExtensionInList(extensions.ToAscii(), extension);
 165 }
 166
 167 // ----------------------------------------------------------------------------
 168 // wxGLApp
 169 // ----------------------------------------------------------------------------
 170
 171 bool wxGLApp::InitGLVisual(const int *attribList)
 172 {
 173     WXGLPixelFormat fmt = WXGLChoosePixelFormat(attribList);
 174     if ( !fmt )
 175         return false;
 176
 177     WXGLDestroyPixelFormat(fmt);
 178     return true;
 179 }
 180
 181 #endif // wxUSE_GLCANVAS