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 WXGLContext WXGLCreateContext( WXGLPixelFormat pixelFormat, WXGLContext shareContext )
  39 {
  40     WXGLContext context = [[NSOpenGLContext alloc] initWithFormat:pixelFormat shareContext: shareContext];
  41     if ( !context )
  42         wxFAIL_MSG("NSOpenGLContext creation failed");
  43     return context ;
  44 }
  45
  46 void WXGLDestroyContext( WXGLContext context )
  47 {
  48     if ( context )
  49     {
  50         [context release];
  51     }
  52 }
  53
  54 void WXGLSwapBuffers( WXGLContext context )
  55 {
  56     [context flushBuffer];
  57 }
  58
  59 WXGLContext WXGLGetCurrentContext()
  60 {
  61     return [NSOpenGLContext currentContext];
  62 }
  63
  64 bool WXGLSetCurrentContext(WXGLContext context)
  65 {
  66     [context makeCurrentContext];
  67
  68     return true;
  69 }
  70
  71 void WXGLDestroyPixelFormat( WXGLPixelFormat pixelFormat )
  72 {
  73     if ( pixelFormat )
  74     {
  75         [pixelFormat release];
  76     }
  77 }
  78
  79
  80 WXGLPixelFormat WXGLChoosePixelFormat(const int *attribList)
  81 {
  82     NSOpenGLPixelFormatAttribute data[512];
  83     const NSOpenGLPixelFormatAttribute defaultAttribs[] =
  84     {
  85         NSOpenGLPFADoubleBuffer,
  86         NSOpenGLPFAMinimumPolicy,
  87         NSOpenGLPFAColorSize,(NSOpenGLPixelFormatAttribute)8,
  88         NSOpenGLPFAAlphaSize,(NSOpenGLPixelFormatAttribute)0,
  89         NSOpenGLPFADepthSize,(NSOpenGLPixelFormatAttribute)8,
  90         (NSOpenGLPixelFormatAttribute)nil
  91     };
  92
  93     const NSOpenGLPixelFormatAttribute *attribs;
  94     if ( !attribList )
  95     {
  96         attribs = defaultAttribs;
  97     }
  98     else
  99     {
 100         unsigned p = 0;
 101         data[p++] = NSOpenGLPFAMinimumPolicy; // make _SIZE tags behave more like GLX
 102
 103         for ( unsigned arg = 0; attribList[arg] !=0 && p < WXSIZEOF(data); )
 104         {
 105             switch ( attribList[arg++] )
 106             {
 107                 case WX_GL_RGBA:
 108                     //data[p++] = AGL_RGBA;
 109                     break;
 110
 111                 case WX_GL_BUFFER_SIZE:
 112                     //data[p++] = AGL_BUFFER_SIZE;
 113                     //data[p++] = attribList[arg++];
 114                     break;
 115
 116                 case WX_GL_LEVEL:
 117                     //data[p++]=AGL_LEVEL;
 118                     //data[p++]=attribList[arg++];
 119                     break;
 120
 121                 case WX_GL_DOUBLEBUFFER:
 122                     data[p++] = NSOpenGLPFADoubleBuffer;
 123                     break;
 124
 125                 case WX_GL_STEREO:
 126                     data[p++] = NSOpenGLPFAStereo;
 127                     break;
 128
 129                 case WX_GL_AUX_BUFFERS:
 130                     data[p++] = NSOpenGLPFAAuxBuffers;
 131                     data[p++] = (NSOpenGLPixelFormatAttribute) attribList[arg++];
 132                     break;
 133
 134                 case WX_GL_MIN_RED:
 135                     data[p++] = NSOpenGLPFAColorSize;
 136                     data[p++] = (NSOpenGLPixelFormatAttribute) attribList[arg++];
 137                     break;
 138
 139                 case WX_GL_MIN_GREEN:
 140                     //data[p++] = AGL_GREEN_SIZE;
 141                     //data[p++] = attribList[arg++];
 142                     break;
 143
 144                 case WX_GL_MIN_BLUE:
 145                     //data[p++] = AGL_BLUE_SIZE;
 146                     //data[p++] = attribList[arg++];
 147                     break;
 148
 149                 case WX_GL_MIN_ALPHA:
 150                     data[p++] = NSOpenGLPFAAlphaSize;
 151                     data[p++] = (NSOpenGLPixelFormatAttribute) attribList[arg++];
 152                     break;
 153
 154                 case WX_GL_DEPTH_SIZE:
 155                     data[p++] = NSOpenGLPFADepthSize;
 156                     data[p++] = (NSOpenGLPixelFormatAttribute) attribList[arg++];
 157                     break;
 158
 159                 case WX_GL_STENCIL_SIZE:
 160                     data[p++] = NSOpenGLPFAStencilSize;
 161                     data[p++] = (NSOpenGLPixelFormatAttribute) attribList[arg++];
 162                     break;
 163
 164                 case WX_GL_MIN_ACCUM_RED:
 165                     data[p++] = NSOpenGLPFAAccumSize;
 166                     data[p++] = (NSOpenGLPixelFormatAttribute) attribList[arg++];
 167                     break;
 168
 169                 case WX_GL_MIN_ACCUM_GREEN:
 170                     //data[p++] = AGL_ACCUM_GREEN_SIZE;
 171                     //data[p++] = attribList[arg++];
 172                     break;
 173
 174                 case WX_GL_MIN_ACCUM_BLUE:
 175                     //data[p++] = AGL_ACCUM_BLUE_SIZE;
 176                     //data[p++] = attribList[arg++];
 177                     break;
 178
 179                 case WX_GL_MIN_ACCUM_ALPHA:
 180                     //data[p++] = AGL_ACCUM_ALPHA_SIZE;
 181                     //data[p++] = attribList[arg++];
 182                     break;
 183
 184                 case WX_GL_SAMPLE_BUFFERS:
 185                     if ( !wxGLCanvas::IsAGLMultiSampleAvailable() )
 186                     {
 187                         if ( !attribList[arg++] )
 188                             break;
 189
 190                         return false;
 191                     }
 192
 193                     data[p++] = NSOpenGLPFASampleBuffers;
 194                     if ( (data[p++] = (NSOpenGLPixelFormatAttribute) attribList[arg++]) == true )
 195                     {
 196                         // don't use software fallback
 197                         data[p++] = NSOpenGLPFANoRecovery;
 198                     }
 199                     break;
 200
 201                 case WX_GL_SAMPLES:
 202                     if ( !wxGLCanvas::IsAGLMultiSampleAvailable() )
 203                     {
 204                         if ( !attribList[arg++] )
 205                             break;
 206
 207                         return false;
 208                     }
 209
 210                     data[p++] = NSOpenGLPFASamples;
 211                     data[p++] = (NSOpenGLPixelFormatAttribute) attribList[arg++];
 212                     break;
 213             }
 214         }
 215
 216         data[p] = (NSOpenGLPixelFormatAttribute)nil;
 217
 218         attribs = data;
 219     }
 220
 221     return [[NSOpenGLPixelFormat alloc] initWithAttributes:(NSOpenGLPixelFormatAttribute*) attribs];
 222 }
 223
 224 @interface wxNSCustomOpenGLView : NSView
 225 {
 226     NSOpenGLContext* context;
 227 }
 228
 229 @end
 230
 231 @implementation wxNSCustomOpenGLView
 232
 233 + (void)initialize
 234 {
 235     static BOOL initialized = NO;
 236     if (!initialized)
 237     {
 238         initialized = YES;
 239         wxOSXCocoaClassAddWXMethods( self );
 240     }
 241 }
 242
 243 - (BOOL)isOpaque
 244 {
 245     return YES;
 246 }
 247
 248 @end
 249
 250 bool wxGLCanvas::Create(wxWindow *parent,
 251                         wxWindowID id,
 252                         const wxPoint& pos,
 253                         const wxSize& size,
 254                         long style,
 255                         const wxString& name,
 256                         const int *attribList,
 257                         const wxPalette& WXUNUSED(palette))
 258 {
 259     m_glFormat = WXGLChoosePixelFormat(attribList);
 260     if ( !m_glFormat )
 261         return false;
 262
 263    // m_macIsUserPane = false ;
 264
 265     if ( !wxWindow::Create(parent, id, pos, size, style, name) )
 266         return false;
 267
 268 /*
 269     NSRect r = wxOSXGetFrameForControl( this, pos , size ) ;
 270     wxNSCustomOpenGLView* v = [[wxNSCustomOpenGLView alloc] initWithFrame:r];
 271     m_peer = new wxWidgetCocoaImpl( this, v );
 272
 273     MacPostControlCreate(pos, size) ;
 274 */
 275     return true;
 276 }
 277
 278 wxGLCanvas::~wxGLCanvas()
 279 {
 280     if ( m_glFormat )
 281         WXGLDestroyPixelFormat(m_glFormat);
 282 }
 283
 284 bool wxGLCanvas::SwapBuffers()
 285 {
 286     WXGLContext context = WXGLGetCurrentContext();
 287     wxCHECK_MSG(context, false, wxT("should have current context"));
 288
 289     [context flushBuffer];
 290
 291     return true;
 292 }
 293
 294 bool wxGLContext::SetCurrent(const wxGLCanvas& win) const
 295 {
 296     if ( !m_glContext )
 297         return false;
 298
 299     [m_glContext setView: win.GetHandle() ];
 300     [m_glContext update];
 301
 302     [m_glContext makeCurrentContext];
 303
 304     return true;
 305 }
 306
 307 #endif // wxUSE_GLCANVAS