src/mac/glcanvas.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        glcanvas.cpp
   3 // Purpose:     wxGLCanvas, for using OpenGL with wxWindows under Macintosh
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     1998-01-01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:       wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "glcanvas.h"
  14 #endif
  15
  16 #include "wx/wxprec.h"
  17
  18 #if defined(__BORLANDC__)
  19 #pragma hdrstop
  20 #endif
  21
  22 #include "wx/setup.h"
  23
  24 #if wxUSE_GLCANVAS
  25
  26 #ifndef WX_PRECOMP
  27 #include "wx/frame.h"
  28 #endif
  29
  30 #include "wx/settings.h"
  31 #include "wx/log.h"
  32
  33 #include "wx/glcanvas.h"
  34 #include "wx/mac/uma.h"
  35
  36 /*
  37 * GLContext implementation
  38 */
  39
  40 wxGLContext::wxGLContext(
  41                          AGLPixelFormat fmt, wxGLCanvas *win,
  42                          const wxPalette& palette,
  43                          const wxGLContext *other        /* for sharing display lists */
  44                          )
  45 {
  46     m_window = win;
  47
  48     m_drawable = (AGLDrawable) UMAGetWindowPort(MAC_WXHWND(win->MacGetRootWindow()));
  49
  50     m_glContext = aglCreateContext(fmt, other ? other->m_glContext : NULL);
  51     wxCHECK_RET( m_glContext, wxT("Couldn't create OpenGl context") );
  52
  53     GLboolean b;
  54     b = aglSetDrawable(m_glContext, m_drawable);
  55     wxCHECK_RET( b, wxT("Couldn't bind OpenGl context") );
  56     aglEnable(m_glContext , AGL_BUFFER_RECT ) ;
  57     b = aglSetCurrentContext(m_glContext);
  58     wxCHECK_RET( b, wxT("Couldn't activate OpenGl context") );
  59 }
  60
  61 wxGLContext::~wxGLContext()
  62 {
  63     if (m_glContext)
  64     {
  65         aglSetCurrentContext(NULL);
  66         aglDestroyContext(m_glContext);
  67     }
  68 }
  69
  70 void wxGLContext::SwapBuffers()
  71 {
  72     if (m_glContext)
  73     {
  74         aglSwapBuffers(m_glContext);
  75     }
  76 }
  77
  78 void wxGLContext::SetCurrent()
  79 {
  80     if (m_glContext)
  81     {
  82         aglSetCurrentContext(m_glContext);
  83     }
  84 }
  85
  86 void wxGLContext::Update()
  87 {
  88     if (m_glContext)
  89     {
  90         aglUpdateContext(m_glContext);
  91     }
  92 }
  93
  94 void wxGLContext::SetColour(const wxChar *colour)
  95 {
  96     float r = 0.0;
  97     float g = 0.0;
  98     float b = 0.0;
  99     wxColour *col = wxTheColourDatabase->FindColour(colour);
 100     if (col)
 101     {
 102         r = (float)(col->Red()/256.0);
 103         g = (float)(col->Green()/256.0);
 104         b = (float)(col->Blue()/256.0);
 105         glColor3f( r, g, b);
 106     }
 107 }
 108
 109
 110 /*
 111 * wxGLCanvas implementation
 112 */
 113
 114 IMPLEMENT_CLASS(wxGLCanvas, wxWindow)
 115
 116 BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow)
 117     EVT_SIZE(wxGLCanvas::OnSize)
 118 END_EVENT_TABLE()
 119
 120 wxGLCanvas::wxGLCanvas(wxWindow *parent, wxWindowID id,
 121                        const wxPoint& pos, const wxSize& size, long style, const wxString& name,
 122                        int *attribList, const wxPalette& palette)
 123 {
 124     Create(parent, NULL, id, pos, size, style, name, attribList, palette);
 125 }
 126
 127 wxGLCanvas::wxGLCanvas( wxWindow *parent,
 128                        const wxGLContext *shared, wxWindowID id,
 129                        const wxPoint& pos, const wxSize& size, long style, const wxString& name,
 130                        int *attribList, const wxPalette& palette )
 131 {
 132     Create(parent, shared, id, pos, size, style, name, attribList, palette);
 133 }
 134
 135 wxGLCanvas::wxGLCanvas( wxWindow *parent, const wxGLCanvas *shared, wxWindowID id,
 136                        const wxPoint& pos, const wxSize& size, long style, const wxString& name,
 137                        int *attribList, const wxPalette& palette )
 138 {
 139     Create(parent, shared ? shared->GetContext() : NULL, id, pos, size, style, name, attribList, palette);
 140 }
 141
 142 wxGLCanvas::~wxGLCanvas()
 143 {
 144     if (m_glContext != NULL) {
 145         delete m_glContext;
 146         m_glContext = NULL;
 147     }
 148 }
 149
 150 static AGLPixelFormat ChoosePixelFormat(const int *attribList)
 151 {
 152     GLint data[512];
 153     GLint defaultAttribs[] = { AGL_RGBA,
 154         AGL_DOUBLEBUFFER,
 155         AGL_MINIMUM_POLICY,
 156         AGL_DEPTH_SIZE, 1,  // use largest available depth buffer
 157         AGL_RED_SIZE, 1,
 158         AGL_GREEN_SIZE, 1,
 159         AGL_BLUE_SIZE, 1,
 160         AGL_ALPHA_SIZE, 0,
 161         AGL_NONE };
 162     GLint *attribs;
 163     if (!attribList)
 164     {
 165         attribs = defaultAttribs;
 166     }
 167     else
 168     {
 169         int arg=0, p=0;
 170
 171         data[p++] = AGL_MINIMUM_POLICY; // make _SIZE tags behave more like GLX
 172         while( (attribList[arg]!=0) && (p<512) )
 173         {
 174             switch( attribList[arg++] )
 175             {
 176             case WX_GL_RGBA: data[p++] = AGL_RGBA; break;
 177             case WX_GL_BUFFER_SIZE:
 178                 data[p++]=AGL_BUFFER_SIZE; data[p++]=attribList[arg++]; break;
 179             case WX_GL_LEVEL:
 180                 data[p++]=AGL_LEVEL; data[p++]=attribList[arg++]; break;
 181             case WX_GL_DOUBLEBUFFER: data[p++] = AGL_DOUBLEBUFFER; break;
 182             case WX_GL_STEREO: data[p++] = AGL_STEREO; break;
 183             case WX_GL_AUX_BUFFERS:
 184                 data[p++]=AGL_AUX_BUFFERS; data[p++]=attribList[arg++]; break;
 185             case WX_GL_MIN_RED:
 186                 data[p++]=AGL_RED_SIZE; data[p++]=attribList[arg++]; break;
 187             case WX_GL_MIN_GREEN:
 188                 data[p++]=AGL_GREEN_SIZE; data[p++]=attribList[arg++]; break;
 189             case WX_GL_MIN_BLUE:
 190                 data[p++]=AGL_BLUE_SIZE; data[p++]=attribList[arg++]; break;
 191             case WX_GL_MIN_ALPHA:
 192                 data[p++]=AGL_ALPHA_SIZE; data[p++]=attribList[arg++]; break;
 193             case WX_GL_DEPTH_SIZE:
 194                 data[p++]=AGL_DEPTH_SIZE; data[p++]=attribList[arg++]; break;
 195             case WX_GL_STENCIL_SIZE:
 196                 data[p++]=AGL_STENCIL_SIZE; data[p++]=attribList[arg++]; break;
 197             case WX_GL_MIN_ACCUM_RED:
 198                 data[p++]=AGL_ACCUM_RED_SIZE; data[p++]=attribList[arg++]; break;
 199             case WX_GL_MIN_ACCUM_GREEN:
 200                 data[p++]=AGL_ACCUM_GREEN_SIZE; data[p++]=attribList[arg++]; break;
 201             case WX_GL_MIN_ACCUM_BLUE:
 202                 data[p++]=AGL_ACCUM_BLUE_SIZE; data[p++]=attribList[arg++]; break;
 203             case WX_GL_MIN_ACCUM_ALPHA:
 204                 data[p++]=AGL_ACCUM_ALPHA_SIZE; data[p++]=attribList[arg++]; break;
 205             default:
 206                 break;
 207             }
 208         }
 209         data[p] = 0;
 210
 211         attribs = data;
 212     }
 213
 214     return aglChoosePixelFormat(NULL, 0, attribs);
 215 }
 216
 217 bool wxGLCanvas::Create(wxWindow *parent, const wxGLContext *shared, wxWindowID id,
 218                         const wxPoint& pos, const wxSize& size, long style, const wxString& name,
 219                         int *attribList, const wxPalette& palette)
 220 {
 221     wxWindow::Create( parent, id, pos, size, style, name );
 222
 223     AGLPixelFormat fmt = ChoosePixelFormat(attribList);
 224     wxCHECK_MSG( fmt, false, wxT("Couldn't create OpenGl pixel format") );
 225
 226     m_glContext = new wxGLContext(fmt, this, palette, shared);
 227     m_macCanvasIsShown = true ;
 228     aglDestroyPixelFormat(fmt);
 229
 230     return true;
 231 }
 232
 233 void wxGLCanvas::SwapBuffers()
 234 {
 235     if (m_glContext)
 236         m_glContext->SwapBuffers();
 237 }
 238
 239 void wxGLCanvas::UpdateContext()
 240 {
 241     if (m_glContext)
 242         m_glContext->Update();
 243 }
 244
 245 void wxGLCanvas::SetViewport()
 246 {
 247     // viewport is initially set to entire port
 248     // adjust glViewport to just this window
 249     int x = 0 ;
 250     int y = 0 ;
 251
 252     wxWindow* iter = this ;
 253     while( iter->GetParent() )
 254     {
 255         iter = iter->GetParent() ;
 256     }
 257
 258     if ( iter && iter->IsTopLevel() )
 259     {
 260             MacClientToRootWindow( &x , &y ) ;
 261             int width, height;
 262             GetClientSize(& width, & height);
 263             Rect bounds ;
 264             GetWindowPortBounds( MAC_WXHWND(MacGetRootWindow()) , &bounds ) ;
 265             GLint parms[4] ;
 266             parms[0] = x ;
 267             parms[1] = bounds.bottom - bounds.top - ( y + height ) ;
 268             parms[2] = width ;
 269             parms[3] = height ;
 270
 271             if ( !m_macCanvasIsShown )
 272                 parms[0] += 20000 ;
 273             aglSetInteger( m_glContext->m_glContext , AGL_BUFFER_RECT , parms ) ;
 274         }
 275 }
 276
 277 void wxGLCanvas::OnSize(wxSizeEvent& event)
 278 {
 279     MacUpdateView() ;
 280 }
 281
 282 void wxGLCanvas::MacUpdateView()
 283 {
 284     if (m_glContext)
 285     {
 286         UpdateContext();
 287         m_glContext->SetCurrent();
 288         SetViewport();
 289     }
 290 }
 291
 292 void wxGLCanvas::MacSuperChangedPosition()
 293 {
 294     MacUpdateView() ;
 295     wxWindow::MacSuperChangedPosition() ;
 296 }
 297
 298 void wxGLCanvas::MacTopLevelWindowChangedPosition()
 299 {
 300     MacUpdateView() ;
 301     wxWindow::MacTopLevelWindowChangedPosition() ;
 302 }
 303
 304 void wxGLCanvas::SetCurrent()
 305 {
 306     if (m_glContext)
 307     {
 308         m_glContext->SetCurrent();
 309     }
 310 }
 311
 312 void wxGLCanvas::SetColour(const wxChar *colour)
 313 {
 314     if (m_glContext)
 315         m_glContext->SetColour(colour);
 316 }
 317
 318 bool wxGLCanvas::Show(bool show)
 319 {
 320     if ( !wxWindow::Show( show ) )
 321         return FALSE ;
 322
 323     if ( !show )
 324     {
 325         if ( m_macCanvasIsShown )
 326         {
 327             m_macCanvasIsShown = false ;
 328             SetViewport() ;
 329         }
 330     }
 331     else
 332     {
 333         if ( MacIsReallyShown() && !m_macCanvasIsShown )
 334         {
 335             m_macCanvasIsShown = true ;
 336             SetViewport() ;
 337         }
 338     }
 339     return TRUE ;
 340 }
 341
 342 void wxGLCanvas::MacSuperShown( bool show )
 343 {
 344     if ( !show )
 345     {
 346         if ( m_macCanvasIsShown )
 347         {
 348             m_macCanvasIsShown = false ;
 349             SetViewport() ;
 350         }
 351     }
 352     else
 353     {
 354         if ( MacIsReallyShown() && !m_macCanvasIsShown )
 355         {
 356             m_macCanvasIsShown = true ;
 357             SetViewport() ;
 358         }
 359     }
 360
 361     wxWindow::MacSuperShown( show ) ;
 362 }
 363
 364 //---------------------------------------------------------------------------
 365 // wxGLApp
 366 //---------------------------------------------------------------------------
 367
 368 IMPLEMENT_CLASS(wxGLApp, wxApp)
 369
 370 bool wxGLApp::InitGLVisual(int *attribList)
 371 {
 372     AGLPixelFormat fmt = ChoosePixelFormat(attribList);
 373     if (fmt != NULL) {
 374         aglDestroyPixelFormat(fmt);
 375         return true;
 376     } else
 377         return false;
 378 }
 379
 380 wxGLApp::~wxGLApp(void)
 381 {
 382 }
 383
 384 #endif // wxUSE_GLCANVAS