TGLContextPrivate.cxx

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// @(#)root/gl:$Id$
// Author:  Timur Pocheptsov, Jun 2007
 
#include "TGLContextPrivate.h"
 
#ifdef R__HAS_COCOA
#include <cassert>
 
#include "TVirtualX.h"
#include "TError.h"
#endif
 
////////////////////////////////////////////////////////////////////////////////
///Register gl-context to find it later as current (GetCurrentContext)
 
void TGLContextPrivate::RegisterContext(TGLContext *ctx)
{
   if (ctx->IsValid())
      fgContexts[ctx->fPimpl->fGLContext] = ctx;
}
 
////////////////////////////////////////////////////////////////////////////////
///Un-register deleted context.
 
void TGLContextPrivate::RemoveContext(TGLContext *ctx)
{
   if (ctx->IsValid())
      fgContexts.erase(ctx->fPimpl->fGLContext);
}
 
#ifdef WIN32
 
std::map<HGLRC, TGLContext *> TGLContextPrivate::fgContexts;
 
////////////////////////////////////////////////////////////////////////////////
///Ask wgl what HGLRC is current and look up corresponding TGLContext.
 
TGLContext *TGLContextPrivate::GetCurrentContext()
{
   HGLRC glContext = wglGetCurrentContext();
   std::map<HGLRC, TGLContext *>::const_iterator it = fgContexts.find(glContext);
 
   if (it != fgContexts.end())
      return it->second;
 
   return 0;
}
 
#elif defined(R__HAS_COCOA)
 
std::map<Handle_t, TGLContext *> TGLContextPrivate::fgContexts;
 
////////////////////////////////////////////////////////////////////////////////
 
TGLContext *TGLContextPrivate::GetCurrentContext()
{
   const Handle_t ctxID = gVirtualX->GetCurrentOpenGLContext();
   if (ctxID) {
      assert(fgContexts.find(ctxID) != fgContexts.end() && "GetCurrentContext, context id is unknown");
      return fgContexts[ctxID];
   }
 
   //Else part - error message was issued already by TGCocoa.
   return 0;
}
 
#else
 
std::map<GLXContext, TGLContext *> TGLContextPrivate::fgContexts;
 
////////////////////////////////////////////////////////////////////////////////
///Ask wgl what HGLRC is current and look up corresponding TGLContext.
 
TGLContext *TGLContextPrivate::GetCurrentContext()
{
   GLXContext glContext = glXGetCurrentContext();
   std::map<GLXContext, TGLContext *>::const_iterator it = fgContexts.find(glContext);
 
   if (it != fgContexts.end())
      return it->second;
 
   return nullptr;
}
 
#endif