src/mac/classic/glcanvas.cpp

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