--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hostsupport/hostopenvg/src/src/null/riEGLOS.cpp	Wed Oct 06 17:59:01 2010 +0100
@@ -0,0 +1,160 @@
+/*------------------------------------------------------------------------
+ *
+ * EGL 1.3
+ * -------
+ *
+ * Copyright (c) 2007 The Khronos Group Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and /or associated documentation files
+ * (the "Materials "), to deal in the Materials without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Materials,
+ * and to permit persons to whom the Materials are furnished to do so,
+ * subject to the following conditions: 
+ *
+ * The above copyright notice and this permission notice shall be included 
+ * in all copies or substantial portions of the Materials. 
+ *
+ * THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE MATERIALS OR
+ * THE USE OR OTHER DEALINGS IN THE MATERIALS.
+ *
+ *//**
+ * \file
+ * \brief	Generic OS EGL functionality (not thread safe, no window rendering)
+ * \note
+  *//*-------------------------------------------------------------------*/
+
+#include "egl.h"
+#include "riImage.h"
+
+namespace OpenVGRI
+{
+
+/*-------------------------------------------------------------------*//*!
+* \brief	
+* \param	
+* \return	
+* \note		
+*//*-------------------------------------------------------------------*/
+
+void* OSGetCurrentThreadID(void)
+{
+	return NULL;
+}
+
+/*-------------------------------------------------------------------*//*!
+* \brief	
+* \param	
+* \return	
+* \note		
+*//*-------------------------------------------------------------------*/
+
+static int mutexRefCount = 0;
+static bool mutexInitialized = false;
+//acquired mutex cannot be deinited
+void OSDeinitMutex(void)
+{
+	RI_ASSERT(mutexInitialized);
+	RI_ASSERT(mutexRefCount == 0);
+}
+void OSAcquireMutex(void)
+{
+	if(!mutexInitialized)
+    {
+        mutexInitialized = true;
+    }
+	mutexRefCount++;
+}
+void OSReleaseMutex(void)
+{
+	RI_ASSERT(mutexInitialized);
+	mutexRefCount--;
+	RI_ASSERT(mutexRefCount >= 0);
+}
+
+/*-------------------------------------------------------------------*//*!
+* \brief	
+* \param	
+* \return	
+* \note		
+*//*-------------------------------------------------------------------*/
+
+struct OSWindowContext
+{
+    int                 tmpWidth;
+    int                 tmpHeight;
+};
+
+void* OSCreateWindowContext(EGLNativeWindowType window)
+{
+    OSWindowContext* ctx = NULL;
+    try
+    {
+        ctx = RI_NEW(OSWindowContext, ());
+    }
+	catch(std::bad_alloc)
+	{
+		return NULL;
+	}
+    ctx->tmpWidth = 0;
+    ctx->tmpHeight = 0;
+    return ctx;
+}
+
+void OSDestroyWindowContext(void* context)
+{
+    OSWindowContext* ctx = (OSWindowContext*)context;
+    if(ctx)
+    {
+        RI_DELETE(ctx);
+    }
+}
+
+bool OSIsWindow(const void* context)
+{
+    OSWindowContext* ctx = (OSWindowContext*)context;
+    if(ctx)
+    {
+        return true;
+    }
+    return false;
+}
+
+void OSGetWindowSize(const void* context, int& width, int& height)
+{
+    OSWindowContext* ctx = (OSWindowContext*)context;
+    if(ctx)
+    {
+        width = ctx->tmpWidth;
+        height = ctx->tmpHeight;
+    }
+    else
+    {
+        width = 0;
+        height = 0;
+    }
+}
+
+void OSBlitToWindow(void* context, const Drawable* drawable)
+{
+    OSWindowContext* ctx = (OSWindowContext*)context;
+    if(ctx)
+    {
+        ctx->tmpWidth = drawable->getWidth();
+        ctx->tmpHeight = drawable->getHeight();
+    }
+}
+
+EGLDisplay OSGetDisplay(EGLNativeDisplayType display_id)
+{
+    RI_UNREF(display_id);
+    return (EGLDisplay)1;    //support only a single display
+}
+
+}   //namespace OpenVGRI