diff -r a4c94be9fb92 -r 220791dae4c4 guestrendering/guestegl/src/eglattribs.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/guestrendering/guestegl/src/eglattribs.cpp	Wed Sep 08 15:45:18 2010 +0100
@@ -0,0 +1,122 @@
+// Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// Guest Egl implementation of attributes and attribute lists
+
+#include <e32debug.h>
+#include "eglapi.h"
+
+
+
+TInt TAttribUtils::AttribListLength(const EGLint* aAttribList)
+	{
+	int length = 0;
+	if (aAttribList)
+		{
+		while (aAttribList[length] != EGL_NONE)
+			{
+			length += 2;
+			EGLPANIC_ASSERT_DEBUG(length < 100, EEglPanicAtribListLengthTooLong);
+			}
+		++length;
+		}
+	return length;
+	}
+
+const EGLint* TAttribUtils::FindAttribValue(const EGLint* aAttribList, EGLint aAttrib)
+	{
+	EGLPANIC_ASSERT_DEBUG(aAttrib != EGL_NONE, EEglPanicTemp);
+
+	if (aAttribList && (aAttrib != EGL_NONE) )
+		{
+		TInt idx = 0;
+		while (aAttribList[idx] != EGL_NONE)
+			{
+			if (aAttribList[idx] == aAttrib)
+				{
+				return aAttribList + idx + 1;
+				}
+			idx += 2;
+			EGLPANIC_ASSERT_DEBUG(idx < 100, EEglPanicAtribListLengthTooLong);
+			}
+		}
+	return NULL;
+	}
+
+EGLint* TAttribUtils::FindAttribValue(EGLint* aAttribList, EGLint aAttrib)
+	{
+	EGLPANIC_ASSERT_DEBUG(aAttrib != EGL_NONE, EEglPanicTemp);
+
+	if (aAttribList && (aAttrib != EGL_NONE) )
+		{
+		TInt idx = 0;
+		while (aAttribList[idx] != EGL_NONE)
+			{
+			if (aAttribList[idx] == aAttrib)
+				{
+				return aAttribList + idx + 1;
+				}
+			idx += 2;
+			EGLPANIC_ASSERT_DEBUG(idx < 100, EEglPanicAtribListLengthTooLong);
+			}
+		}
+	return NULL;
+	}
+
+void TAttribUtils::AppendAttribValue(EGLint* aAttribList, EGLint aAttrib, EGLint aValue)
+	{
+	EGLPANIC_ASSERT_DEBUG(aAttrib != EGL_NONE, EEglPanicTemp);
+
+	if (aAttribList && (aAttrib != EGL_NONE))
+		{
+		TInt idx = 0;
+		while (aAttribList[idx] != EGL_NONE)
+			{
+			idx += 2;
+			EGLPANIC_ASSERT_DEBUG(idx < 100, EEglPanicAtribListLengthTooLong);
+			}
+		aAttribList[idx++] = aAttrib;
+		aAttribList[idx++] = aValue;
+		aAttribList[idx++] = EGL_NONE;
+		}
+	}
+
+void TAttribUtils::RemoveAttrib(EGLint* aAttribList, EGLint aAttrib)
+	{
+	EGLPANIC_ASSERT_DEBUG(aAttrib != EGL_NONE, EEglPanicTemp);
+
+	if (aAttribList && (aAttrib != EGL_NONE) && (*aAttribList != EGL_NONE))
+		{
+		TInt dstIdx = 0;
+
+		while ( (aAttribList[dstIdx] != EGL_NONE) && (aAttribList[dstIdx] != aAttrib) )
+			{
+			dstIdx += 2;
+			EGLPANIC_ASSERT_DEBUG(dstIdx < 100, EEglPanicAtribListLengthTooLong);
+			}
+
+		if (aAttribList[dstIdx] == aAttrib)
+			{ // attrib found
+			TInt srcIdx = dstIdx + 2;
+			while (aAttribList[srcIdx] != EGL_NONE)
+				{ // copy up succeeding attrib / value pairs
+				aAttribList[dstIdx++] = aAttribList[srcIdx++];
+				aAttribList[dstIdx++] = aAttribList[srcIdx++];
+				EGLPANIC_ASSERT_DEBUG(dstIdx < 100, EEglPanicAtribListLengthTooLong);
+				}
+			aAttribList[dstIdx++] = EGL_NONE;
+			}
+		}
+	}
+
+// end of file eglattrib.cpp