0023243: Adapt OpenGL viewer for using in Cocoa applications on Mac OS X

[occt.git] / src / OpenGl / OpenGl_Context_1.mm

diff --git a/src/OpenGl/OpenGl_Context_1.mm b/src/OpenGl/OpenGl_Context_1.mm
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+// Created on: 2012-11-12
+// Created by: Kirill GAVRILOV
+// Copyright (c) 2012 OPEN CASCADE SAS
+//
+// The content of this file is subject to the Open CASCADE Technology Public
+// License Version 6.5 (the "License"). You may not use the content of this file
+// except in compliance with the License. Please obtain a copy of the License
+// at http://www.opencascade.org and read it completely before using this file.
+//
+// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
+// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
+//
+// The Original Code and all software distributed under the License is
+// distributed on an "AS IS" basis, without warranty of any kind, and the
+// Initial Developer hereby disclaims all such warranties, including without
+// limitation, any warranties of merchantability, fitness for a particular
+// purpose or non-infringement. Please see the License for the specific terms
+// and conditions governing the rights and limitations under the License.
+
+#if defined(__APPLE__) && !defined(MACOSX_USE_GLX)
+
+#import <Cocoa/Cocoa.h>
+
+#include <OpenGl_GlCore11.hxx>
+#include <OpenGl_Context.hxx>
+
+#include <Standard_ProgramError.hxx>
+
+// =======================================================================
+// function : IsCurrent
+// purpose  :
+// =======================================================================
+Standard_Boolean OpenGl_Context::IsCurrent() const
+{
+  return myGContext != NULL
+      && [NSOpenGLContext currentContext] == (NSOpenGLContext* )myGContext;
+}
+
+// =======================================================================
+// function : MakeCurrent
+// purpose  :
+// =======================================================================
+Standard_Boolean OpenGl_Context::MakeCurrent()
+{
+  if (myGContext == NULL)
+  {
+    Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
+    return Standard_False;
+  }
+
+  [(NSOpenGLContext* )myGContext makeCurrentContext];
+  return Standard_True;
+}
+
+// =======================================================================
+// function : SwapBuffers
+// purpose  :
+// =======================================================================
+void OpenGl_Context::SwapBuffers()
+{
+  if (myGContext != NULL)
+  {
+    glFinish();
+    [(NSOpenGLContext* )myGContext flushBuffer];
+  }
+}
+
+// =======================================================================
+// function : Init
+// purpose  :
+// =======================================================================
+Standard_Boolean OpenGl_Context::Init()
+{
+  if (myIsInitialized)
+  {
+    return Standard_True;
+  }
+
+  myGContext = [NSOpenGLContext currentContext];
+  if (myGContext == NULL)
+  {
+    return Standard_False;
+  }
+
+  init();
+  myIsInitialized = Standard_True;
+  return Standard_True;
+}
+
+#endif // __APPLE__