src/mac/classic/glcanvas.cpp

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