include/wx/glcanvas.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/glcanvas.h
   3 // Purpose:     wxGLCanvas base header
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:
   7 // Copyright:   (c) Julian Smart
   8 // RCS-ID:      $Id$
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_GLCANVAS_H_BASE_
  13 #define _WX_GLCANVAS_H_BASE_
  14
  15 #include "wx/defs.h"
  16
  17 #if wxUSE_GLCANVAS
  18
  19 #include "wx/app.h"
  20 #include "wx/palette.h"
  21 #include "wx/window.h"
  22
  23 class WXDLLIMPEXP_FWD_GL wxGLCanvas;
  24 class WXDLLIMPEXP_FWD_GL wxGLContext;
  25
  26 // ----------------------------------------------------------------------------
  27 // Constants for attributes list
  28 // ----------------------------------------------------------------------------
  29
  30 // The generic OpenGL implementation doesn't support most of these options,
  31 // such as stereo, auxiliary buffers, alpha channel, and accumulator buffer.
  32 // Other implementations may actually support them.
  33 enum
  34 {
  35     WX_GL_RGBA=1,          /* use true color palette */
  36     WX_GL_BUFFER_SIZE,     /* bits for buffer if not WX_GL_RGBA */
  37     WX_GL_LEVEL,           /* 0 for main buffer, >0 for overlay, <0 for underlay */
  38     WX_GL_DOUBLEBUFFER,    /* use doublebuffer */
  39     WX_GL_STEREO,          /* use stereoscopic display */
  40     WX_GL_AUX_BUFFERS,     /* number of auxiliary buffers */
  41     WX_GL_MIN_RED,         /* use red buffer with most bits (> MIN_RED bits) */
  42     WX_GL_MIN_GREEN,       /* use green buffer with most bits (> MIN_GREEN bits) */
  43     WX_GL_MIN_BLUE,        /* use blue buffer with most bits (> MIN_BLUE bits) */
  44     WX_GL_MIN_ALPHA,       /* use alpha buffer with most bits (> MIN_ALPHA bits) */
  45     WX_GL_DEPTH_SIZE,      /* bits for Z-buffer (0,16,32) */
  46     WX_GL_STENCIL_SIZE,    /* bits for stencil buffer */
  47     WX_GL_MIN_ACCUM_RED,   /* use red accum buffer with most bits (> MIN_ACCUM_RED bits) */
  48     WX_GL_MIN_ACCUM_GREEN, /* use green buffer with most bits (> MIN_ACCUM_GREEN bits) */
  49     WX_GL_MIN_ACCUM_BLUE,  /* use blue buffer with most bits (> MIN_ACCUM_BLUE bits) */
  50     WX_GL_MIN_ACCUM_ALPHA  /* use alpha buffer with most bits (> MIN_ACCUM_ALPHA bits) */
  51 };
  52
  53 #define wxGLCanvasName _T("GLCanvas")
  54
  55 // ----------------------------------------------------------------------------
  56 // wxGLContextBase: OpenGL rendering context
  57 // ----------------------------------------------------------------------------
  58
  59 class WXDLLIMPEXP_GL wxGLContextBase : public wxObject
  60 {
  61 public:
  62     /*
  63         The derived class should provide a ctor with this signature:
  64
  65         wxGLContext(wxGLCanvas *win, const wxGLContext *other = NULL);
  66      */
  67
  68     // set this context as the current one
  69     virtual bool SetCurrent(const wxGLCanvas& win) const = 0;
  70 };
  71
  72 // ----------------------------------------------------------------------------
  73 // wxGLCanvasBase: window which can be used for OpenGL rendering
  74 // ----------------------------------------------------------------------------
  75
  76 class WXDLLIMPEXP_GL wxGLCanvasBase : public wxWindow
  77 {
  78 public:
  79     // default ctor doesn't initialize the window, use Create() later
  80     wxGLCanvasBase();
  81
  82     virtual ~wxGLCanvasBase();
  83
  84
  85     /*
  86        The derived class should provide a ctor with this signature:
  87
  88     wxGLCanvas(wxWindow *parent,
  89                wxWindowID id = wxID_ANY,
  90                int* attribList = 0,
  91                const wxPoint& pos = wxDefaultPosition,
  92                const wxSize& size = wxDefaultSize,
  93                long style = 0,
  94                const wxString& name = wxGLCanvasName,
  95                const wxPalette& palette = wxNullPalette);
  96      */
  97
  98     // operations
  99     // ----------
 100
 101     // set the given context associated with this window as the current one
 102     bool SetCurrent(const wxGLContext& context) const;
 103
 104     // flush the back buffer (if we have it)
 105     virtual bool SwapBuffers() = 0;
 106
 107
 108     // accessors
 109     // ---------
 110
 111     const wxPalette *GetPalette() const { return &m_palette; }
 112
 113     // miscellaneous helper functions
 114     // ------------------------------
 115
 116     // call glcolor() for the colour with the given name, return false if
 117     // colour not found
 118     bool SetColour(const wxString& colour);
 119
 120
 121
 122     // deprecated methods using the implicit wxGLContext
 123 #if WXWIN_COMPATIBILITY_2_8
 124     wxDEPRECATED( wxGLContext* GetContext() const );
 125
 126     wxDEPRECATED( void SetCurrent() );
 127
 128     wxDEPRECATED( void OnSize(wxSizeEvent& event) );
 129 #endif // WXWIN_COMPATIBILITY_2_8
 130
 131 #ifdef __WXUNIVERSAL__
 132     // resolve the conflict with wxWindowUniv::SetCurrent()
 133     virtual bool SetCurrent(bool doit) { return wxWindow::SetCurrent(doit); };
 134 #endif
 135
 136 protected:
 137     // override this to implement SetColour() in GL_INDEX_MODE
 138     // (currently only implemented in wxX11 and wxMotif ports)
 139     virtual int GetColourIndex(const wxColour& WXUNUSED(col)) { return -1; }
 140
 141     // create default palette if we're not using RGBA mode
 142     // (not supported in most ports)
 143     virtual wxPalette CreateDefaultPalette() { return wxNullPalette; }
 144
 145
 146     wxPalette m_palette;
 147
 148 #if WXWIN_COMPATIBILITY_2_8
 149     wxGLContext *m_glContext;
 150 #endif // WXWIN_COMPATIBILITY_2_8
 151 };
 152
 153 // ----------------------------------------------------------------------------
 154 // wxGLApp: a special wxApp subclass for OpenGL applications which must be used
 155 //          to select a visual compatible with the given attributes
 156 // ----------------------------------------------------------------------------
 157
 158 class WXDLLIMPEXP_GL wxGLAppBase : public wxApp
 159 {
 160 public:
 161     wxGLAppBase() : wxApp() { }
 162
 163     // use this in the constructor of the user-derived wxGLApp class to
 164     // determine if an OpenGL rendering context with these attributes
 165     // is available - returns true if so, false if not.
 166     virtual bool InitGLVisual(const int *attribList) = 0;
 167 };
 168
 169 #if defined(__WXMSW__)
 170     #include "wx/msw/glcanvas.h"
 171 #elif defined(__WXMOTIF__) || defined(__WXX11__)
 172     #include "wx/x11/glcanvas.h"
 173 #elif defined(__WXGTK20__)
 174     #include "wx/gtk/glcanvas.h"
 175 #elif defined(__WXGTK__)
 176     #include "wx/gtk1/glcanvas.h"
 177 #elif defined(__WXMAC__)
 178     #include "wx/mac/glcanvas.h"
 179 #elif defined(__WXCOCOA__)
 180     #include "wx/cocoa/glcanvas.h"
 181 #else
 182     #error "wxGLCanvas not supported in this wxWidgets port"
 183 #endif
 184
 185 // wxMac and wxMSW don't need anything extra in wxGLAppBase, so declare it here
 186 #ifndef wxGL_APP_DEFINED
 187
 188 class WXDLLIMPEXP_GL wxGLApp : public wxGLAppBase
 189 {
 190 public:
 191     wxGLApp() : wxGLAppBase() { }
 192
 193     virtual bool InitGLVisual(const int *attribList);
 194
 195 private:
 196     DECLARE_DYNAMIC_CLASS(wxGLApp)
 197 };
 198
 199 #endif // !wxGL_APP_DEFINED
 200
 201 #endif // wxUSE_GLCANVAS
 202
 203 #endif // _WX_GLCANVAS_H_BASE_