src/osx/cocoa/glcanvas.mm

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/cocoa/glcanvas.mm
   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: glcanvas.cpp 54129 2008-06-11 19:30:52Z SC $
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #include "wx/wxprec.h"
  21
  22 #if defined(__BORLANDC__)
  23     #pragma hdrstop
  24 #endif
  25
  26 #if wxUSE_GLCANVAS
  27
  28 #include "wx/glcanvas.h"
  29
  30 #ifndef WX_PRECOMP
  31     #include "wx/frame.h"
  32     #include "wx/log.h"
  33     #include "wx/settings.h"
  34 #endif
  35
  36 #include "wx/osx/private.h"
  37
  38
  39 WXGLContext WXGLCreateContext( WXGLPixelFormat pixelFormat, WXGLContext shareContext )
  40 {
  41     WXGLContext context = [[NSOpenGLContext alloc] initWithFormat:pixelFormat shareContext: shareContext];
  42     if ( !context )
  43         wxFAIL_MSG("NSOpenGLContext creation failed");
  44     return context ;
  45 }
  46
  47 void WXGLDestroyContext( WXGLContext context )
  48 {
  49     if ( context )
  50     {
  51         [context release];
  52     }
  53 }
  54
  55 void WXGLSwapBuffers( WXGLContext context )
  56 {
  57     [context flushBuffer];
  58 }
  59
  60 WXGLContext WXGLGetCurrentContext()
  61 {
  62     return [NSOpenGLContext currentContext];
  63 }
  64
  65 void WXGLDestroyPixelFormat( WXGLPixelFormat pixelFormat )
  66 {
  67     if ( pixelFormat )
  68     {
  69         [pixelFormat release];
  70     }
  71 }
  72
  73
  74 WXGLPixelFormat WXGLChoosePixelFormat(const int *attribList)
  75 {
  76     NSOpenGLPixelFormatAttribute data[512];
  77     const NSOpenGLPixelFormatAttribute defaultAttribs[] =
  78     {
  79         NSOpenGLPFADoubleBuffer,
  80         NSOpenGLPFAMinimumPolicy,
  81         NSOpenGLPFAColorSize,8,
  82         NSOpenGLPFAAlphaSize,0,
  83         NSOpenGLPFADepthSize,8,
  84         (NSOpenGLPixelFormatAttribute)nil
  85     };
  86
  87     const NSOpenGLPixelFormatAttribute *attribs;
  88     if ( !attribList )
  89     {
  90         attribs = defaultAttribs;
  91     }
  92     else
  93     {
  94         unsigned p = 0;
  95         data[p++] = NSOpenGLPFAMinimumPolicy; // make _SIZE tags behave more like GLX
  96
  97         for ( unsigned arg = 0; attribList[arg] !=0 && p < WXSIZEOF(data); )
  98         {
  99             switch ( attribList[arg++] )
 100             {
 101                 case WX_GL_RGBA:
 102                     //data[p++] = AGL_RGBA;
 103                     break;
 104
 105                 case WX_GL_BUFFER_SIZE:
 106                     //data[p++] = AGL_BUFFER_SIZE;
 107                     //data[p++] = attribList[arg++];
 108                     break;
 109
 110                 case WX_GL_LEVEL:
 111                     //data[p++]=AGL_LEVEL;
 112                     //data[p++]=attribList[arg++];
 113                     break;
 114
 115                 case WX_GL_DOUBLEBUFFER:
 116                     data[p++] = NSOpenGLPFADoubleBuffer;
 117                     break;
 118
 119                 case WX_GL_STEREO:
 120                     data[p++] = NSOpenGLPFAStereo;
 121                     break;
 122
 123                 case WX_GL_AUX_BUFFERS:
 124                     data[p++] = NSOpenGLPFAAuxBuffers;
 125                     data[p++] = attribList[arg++];
 126                     break;
 127
 128                 case WX_GL_MIN_RED:
 129                     data[p++] = NSOpenGLPFAColorSize;
 130                     data[p++] = attribList[arg++];
 131                     break;
 132
 133                 case WX_GL_MIN_GREEN:
 134                     //data[p++] = AGL_GREEN_SIZE;
 135                     //data[p++] = attribList[arg++];
 136                     break;
 137
 138                 case WX_GL_MIN_BLUE:
 139                     //data[p++] = AGL_BLUE_SIZE;
 140                     //data[p++] = attribList[arg++];
 141                     break;
 142
 143                 case WX_GL_MIN_ALPHA:
 144                     data[p++] = NSOpenGLPFAAlphaSize;
 145                     data[p++] = attribList[arg++];
 146                     break;
 147
 148                 case WX_GL_DEPTH_SIZE:
 149                     data[p++] = NSOpenGLPFADepthSize;
 150                     data[p++] = attribList[arg++];
 151                     break;
 152
 153                 case WX_GL_STENCIL_SIZE:
 154                     data[p++] = NSOpenGLPFAStencilSize;
 155                     data[p++] = attribList[arg++];
 156                     break;
 157
 158                 case WX_GL_MIN_ACCUM_RED:
 159                     data[p++] = NSOpenGLPFAAccumSize;
 160                     data[p++] = attribList[arg++];
 161                     break;
 162
 163                 case WX_GL_MIN_ACCUM_GREEN:
 164                     //data[p++] = AGL_ACCUM_GREEN_SIZE;
 165                     //data[p++] = attribList[arg++];
 166                     break;
 167
 168                 case WX_GL_MIN_ACCUM_BLUE:
 169                     //data[p++] = AGL_ACCUM_BLUE_SIZE;
 170                     //data[p++] = attribList[arg++];
 171                     break;
 172
 173                 case WX_GL_MIN_ACCUM_ALPHA:
 174                     //data[p++] = AGL_ACCUM_ALPHA_SIZE;
 175                     //data[p++] = attribList[arg++];
 176                     break;
 177
 178                 case WX_GL_SAMPLE_BUFFERS:
 179                     if ( !wxGLCanvas::IsAGLMultiSampleAvailable() )
 180                     {
 181                         if ( !attribList[arg++] )
 182                             break;
 183
 184                         return false;
 185                     }
 186
 187                     data[p++] = NSOpenGLPFASampleBuffers;
 188                     if ( (data[p++] = attribList[arg++]) == true )
 189                     {
 190                         // don't use software fallback
 191                         data[p++] = NSOpenGLPFANoRecovery;
 192                     }
 193                     break;
 194
 195                 case WX_GL_SAMPLES:
 196                     if ( !wxGLCanvas::IsAGLMultiSampleAvailable() )
 197                     {
 198                         if ( !attribList[arg++] )
 199                             break;
 200
 201                         return false;
 202                     }
 203
 204                     data[p++] = NSOpenGLPFASamples;
 205                     data[p++] = attribList[arg++];
 206                     break;
 207             }
 208         }
 209
 210         data[p] = (NSOpenGLPixelFormatAttribute)nil;
 211
 212         attribs = data;
 213     }
 214
 215     return [[NSOpenGLPixelFormat alloc] initWithAttributes:attribs];
 216 }
 217
 218 bool wxGLContext::SetCurrent(const wxGLCanvas& win) const
 219 {
 220     if ( !m_glContext )
 221         return false;
 222
 223     [m_glContext setView: win.GetHandle() ];
 224     [m_glContext update];
 225
 226     [m_glContext makeCurrentContext];
 227
 228     return true;
 229 }
 230
 231 @interface wxNSCustomOpenGLView : NSView
 232 {
 233     wxWidgetImpl* impl;
 234     NSOpenGLContext* context;
 235 }
 236
 237 - (id)initWithFrame:(NSRect)frame;
 238 - (void)setImplementation: (wxWidgetImpl *) theImplementation;
 239 - (wxWidgetImpl*) implementation;
 240 - (BOOL) isFlipped;
 241
 242 @end
 243
 244 @implementation wxNSCustomOpenGLView
 245
 246 - (id)initWithFrame:(NSRect)frame
 247 {
 248     [super initWithFrame:frame];
 249     impl = NULL;
 250     return self;
 251 }
 252
 253 - (void)setImplementation: (wxWidgetImpl *) theImplementation
 254 {
 255     impl = theImplementation;
 256 }
 257
 258 - (wxWidgetImpl*) implementation
 259 {
 260     return impl;
 261 }
 262
 263 - (BOOL) isFlipped
 264 {
 265     return YES;
 266 }
 267
 268 - (BOOL)isOpaque
 269 {
 270     return YES;
 271 }
 272
 273 @end
 274
 275 bool wxGLCanvas::Create(wxWindow *parent,
 276                         wxWindowID id,
 277                         const wxPoint& pos,
 278                         const wxSize& size,
 279                         long style,
 280                         const wxString& name,
 281                         const int *attribList,
 282                         const wxPalette& WXUNUSED(palette))
 283 {
 284     m_glFormat = WXGLChoosePixelFormat(attribList);
 285     if ( !m_glFormat )
 286         return false;
 287
 288    // m_macIsUserPane = false ;
 289
 290     if ( !wxWindow::Create(parent, id, pos, size, style, name) )
 291         return false;
 292
 293 /*
 294     NSView* sv = (parent->GetHandle() );
 295
 296     NSRect r = wxOSXGetFrameForControl( this, pos , size ) ;
 297     wxNSCustomOpenGLView* v = [[wxNSCustomOpenGLView alloc] initWithFrame:r];
 298     [sv addSubview:v];
 299     m_peer = new wxWidgetCocoaImpl( this, v );
 300     [v setImplementation:m_peer];
 301
 302     MacPostControlCreate(pos, size) ;
 303 */
 304     return true;
 305 }
 306
 307 wxGLCanvas::~wxGLCanvas()
 308 {
 309     if ( m_glFormat )
 310         WXGLDestroyPixelFormat(m_glFormat);
 311 }
 312
 313
 314 #endif // wxUSE_GLCANVAS