src/common/glcmn.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/glcmn.cpp
   3 // Purpose:     wxGLCanvasBase implementation
   4 // Author:      Vadim Zeitlin
   5 // Created:     2007-04-09
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2007 Vadim Zeitlin <vadim@wxwindows.org>
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 // ============================================================================
  12 // declarations
  13 // ============================================================================
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 // for compilers that support precompilation, includes "wx.h".
  20 #include "wx/wxprec.h"
  21
  22 #ifdef __BORLANDC__
  23     #pragma hdrstop
  24 #endif
  25
  26 #if wxUSE_GLCANVAS
  27
  28 #ifndef WX_PRECOMP
  29     #include "wx/log.h"
  30 #endif // WX_PRECOMP
  31
  32 #include "wx/glcanvas.h"
  33
  34 // DLL options compatibility check:
  35 #include "wx/build.h"
  36 WX_CHECK_BUILD_OPTIONS("wxGL")
  37
  38 IMPLEMENT_CLASS(wxGLApp, wxApp)
  39
  40 // ============================================================================
  41 // implementation
  42 // ============================================================================
  43
  44 void wxGLCanvasBase::SetCurrent(const wxGLContext& context) const
  45 {
  46     // although on MSW it works even if the window is still hidden, it doesn't
  47     // work in other ports (notably X11-based ones) and documentation mentions
  48     // that SetCurrent() can only be called for a shown window, so check for it
  49     wxASSERT_MSG( IsShownOnScreen(), _T("can't make hidden GL canvas current") );
  50
  51     context.SetCurrent(*wx_static_cast(const wxGLCanvas *, this));
  52 }
  53
  54 bool wxGLCanvasBase::SetColour(const wxChar *colour)
  55 {
  56     wxColour col = wxTheColourDatabase->Find(colour);
  57     if ( !col.Ok() )
  58         return false;
  59
  60     GLboolean isRGBA;
  61     glGetBooleanv(GL_RGBA_MODE, &isRGBA);
  62     if ( isRGBA )
  63     {
  64         glColor3f(col.Red() / 256., col.Green() / 256., col.Blue() / 256.);
  65     }
  66     else // indexed colour
  67     {
  68         GLint pix = GetColourIndex(col);
  69         if ( pix == -1 )
  70         {
  71             wxLogError(_("Failed to allocate colour for OpenGL"));
  72             return false;
  73         }
  74
  75         glIndexi(pix);
  76     }
  77
  78     return true;
  79 }
  80
  81 wxGLCanvasBase::~wxGLCanvasBase()
  82 {
  83 #if WXWIN_COMPATIBILITY_2_8
  84     delete m_glContext;
  85 #endif // WXWIN_COMPATIBILITY_2_8
  86 }
  87
  88 #if WXWIN_COMPATIBILITY_2_8
  89
  90 wxGLContext *wxGLCanvasBase::GetContext() const
  91 {
  92     return m_glContext;
  93 }
  94
  95 void wxGLCanvasBase::SetCurrent()
  96 {
  97     if ( m_glContext )
  98         SetCurrent(*m_glContext);
  99 }
 100
 101 void wxGLCanvasBase::OnSize(wxSizeEvent& WXUNUSED(event))
 102 {
 103 }
 104
 105 #endif // WXWIN_COMPATIBILITY_2_8
 106
 107 #endif // wxUSE_GLCANVAS
 108