diff --git a/opengl/tests/gldual/Android.mk b/opengl/tests/gldual/Android.mk
new file mode 100644
index 0000000..e73c249
--- /dev/null
+++ b/opengl/tests/gldual/Android.mk
@@ -0,0 +1,51 @@
+#########################################################################
+# OpenGL ES JNI sample
+# This makefile builds both an activity and a shared library.
+#########################################################################
+ifneq ($(TARGET_SIMULATOR),true) # not 64 bit clean
+
+TOP_LOCAL_PATH:= $(call my-dir)
+
+# Build activity
+
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_TAGS := user
+
+LOCAL_SRC_FILES := $(call all-subdir-java-files)
+
+LOCAL_PACKAGE_NAME := GLDual
+
+LOCAL_JNI_SHARED_LIBRARIES := libgldualjni
+
+include $(BUILD_PACKAGE)
+
+#########################################################################
+# Build JNI Shared Library
+#########################################################################
+
+LOCAL_PATH:= $(LOCAL_PATH)/jni
+
+include $(CLEAR_VARS)
+
+# Optional tag would mean it doesn't get installed by default
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_CFLAGS := -Werror
+
+LOCAL_SRC_FILES:= \
+  gl_code.cpp
+
+LOCAL_SHARED_LIBRARIES := \
+	libutils \
+	libEGL \
+	libGLESv2
+
+LOCAL_MODULE := libgldualjni
+
+LOCAL_PRELINK_MODULE := false
+
+include $(BUILD_SHARED_LIBRARY)
+
+endif # TARGET_SIMULATOR
diff --git a/opengl/tests/gldual/AndroidManifest.xml b/opengl/tests/gldual/AndroidManifest.xml
new file mode 100644
index 0000000..06f4c4d
--- /dev/null
+++ b/opengl/tests/gldual/AndroidManifest.xml
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+**
+** Copyright 2009, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License"); 
+** you may not use this file except in compliance with the License. 
+** You may obtain a copy of the License at 
+**
+**     http://www.apache.org/licenses/LICENSE-2.0 
+**
+** Unless required by applicable law or agreed to in writing, software 
+** distributed under the License is distributed on an "AS IS" BASIS, 
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
+** See the License for the specific language governing permissions and 
+** limitations under the License.
+*/
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.android.gldual">
+    <application
+            android:label="@string/gldual_activity">
+        <activity android:name="GLDualActivity"
+                android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
+            	android:launchMode="singleTask"
+            	android:configChanges="orientation|keyboardHidden">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>
diff --git a/opengl/tests/gldual/jni/gl_code.cpp b/opengl/tests/gldual/jni/gl_code.cpp
new file mode 100644
index 0000000..f1f0a1f
--- /dev/null
+++ b/opengl/tests/gldual/jni/gl_code.cpp
@@ -0,0 +1,165 @@
+// OpenGL ES 2.0 code
+
+#include <nativehelper/jni.h>
+#define LOG_TAG "GL2JNI gl_code.cpp"
+#include <utils/Log.h>
+
+#include <EGL/egl.h>
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+static void printGLString(const char *name, GLenum s) {
+    const char *v = (const char *) glGetString(s);
+    LOGI("GL %s = %s\n", name, v);
+}
+
+static void checkGlError(const char* op) {
+    for (GLint error = glGetError(); error; error
+            = glGetError()) {
+        LOGI("after %s() glError (0x%x)\n", op, error);
+    }
+}
+
+static const char gVertexShader[] = "attribute vec4 vPosition;\n"
+    "void main() {\n"
+    "  gl_Position = vPosition;\n"
+    "}\n";
+
+static const char gFragmentShader[] = "precision mediump float;\n"
+    "void main() {\n"
+    "  gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0);\n"
+    "}\n";
+
+GLuint loadShader(GLenum shaderType, const char* pSource) {
+    GLuint shader = glCreateShader(shaderType);
+    if (shader) {
+        glShaderSource(shader, 1, &pSource, NULL);
+        glCompileShader(shader);
+        GLint compiled = 0;
+        glGetShaderiv(shader, GL_COMPILE_STATUS, &compiled);
+        if (!compiled) {
+            GLint infoLen = 0;
+            glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLen);
+            if (infoLen) {
+                char* buf = (char*) malloc(infoLen);
+                if (buf) {
+                    glGetShaderInfoLog(shader, infoLen, NULL, buf);
+                    LOGE("Could not compile shader %d:\n%s\n",
+                            shaderType, buf);
+                    free(buf);
+                }
+                glDeleteShader(shader);
+                shader = 0;
+            }
+        }
+    }
+    return shader;
+}
+
+GLuint createProgram(const char* pVertexSource, const char* pFragmentSource) {
+    GLuint vertexShader = loadShader(GL_VERTEX_SHADER, pVertexSource);
+    if (!vertexShader) {
+        return 0;
+    }
+
+    GLuint pixelShader = loadShader(GL_FRAGMENT_SHADER, pFragmentSource);
+    if (!pixelShader) {
+        return 0;
+    }
+
+    GLuint program = glCreateProgram();
+    if (program) {
+        glAttachShader(program, vertexShader);
+        checkGlError("glAttachShader");
+        glAttachShader(program, pixelShader);
+        checkGlError("glAttachShader");
+        glLinkProgram(program);
+        GLint linkStatus = GL_FALSE;
+        glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
+        if (linkStatus != GL_TRUE) {
+            GLint bufLength = 0;
+            glGetProgramiv(program, GL_INFO_LOG_LENGTH, &bufLength);
+            if (bufLength) {
+                char* buf = (char*) malloc(bufLength);
+                if (buf) {
+                    glGetProgramInfoLog(program, bufLength, NULL, buf);
+                    LOGE("Could not link program:\n%s\n", buf);
+                    free(buf);
+                }
+            }
+            glDeleteProgram(program);
+            program = 0;
+        }
+    }
+    return program;
+}
+
+GLuint gProgram;
+GLuint gvPositionHandle;
+
+bool setupGraphics(int w, int h) {
+    printGLString("Version", GL_VERSION);
+    printGLString("Vendor", GL_VENDOR);
+    printGLString("Renderer", GL_RENDERER);
+    printGLString("Extensions", GL_EXTENSIONS);
+
+    LOGI("setupGraphics(%d, %d)", w, h);
+    gProgram = createProgram(gVertexShader, gFragmentShader);
+    if (!gProgram) {
+        LOGE("Could not create program.");
+        return false;
+    }
+    gvPositionHandle = glGetAttribLocation(gProgram, "vPosition");
+    checkGlError("glGetAttribLocation");
+    LOGI("glGetAttribLocation(\"vPosition\") = %d\n",
+            gvPositionHandle);
+
+    glViewport(0, 0, w, h);
+    checkGlError("glViewport");
+    return true;
+}
+
+const GLfloat gTriangleVertices[] = { 0.0f, 0.5f, -0.5f, -0.5f,
+        0.5f, -0.5f };
+
+void renderFrame() {
+    static float grey;
+    grey += 0.01f;
+    if (grey > 1.0f) {
+        grey = 0.0f;
+    }
+    glClearColor(grey, grey, grey, 1.0f);
+    checkGlError("glClearColor");
+    glClear( GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
+    checkGlError("glClear");
+
+    glUseProgram(gProgram);
+    checkGlError("glUseProgram");
+
+    glVertexAttribPointer(gvPositionHandle, 2, GL_FLOAT, GL_FALSE, 0, gTriangleVertices);
+    checkGlError("glVertexAttribPointer");
+    glEnableVertexAttribArray(gvPositionHandle);
+    checkGlError("glEnableVertexAttribArray");
+    glDrawArrays(GL_TRIANGLES, 0, 3);
+    checkGlError("glDrawArrays");
+}
+
+extern "C" {
+    JNIEXPORT void JNICALL Java_com_android_gldual_GLDualLib_init(JNIEnv * env, jobject obj, jint width, jint height);
+    JNIEXPORT void JNICALL Java_com_android_gldual_GLDualLib_step(JNIEnv * env, jobject obj);
+};
+
+JNIEXPORT void JNICALL Java_com_android_gldual_GLDualLib_init(JNIEnv * env, jobject obj, jint width, jint height)
+{
+    setupGraphics(width, height);
+}
+
+JNIEXPORT void JNICALL Java_com_android_gldual_GLDualLib_step(JNIEnv * env, jobject obj)
+{
+    renderFrame();
+}
+
diff --git a/opengl/tests/gldual/res/layout/gldual_activity.xml b/opengl/tests/gldual/res/layout/gldual_activity.xml
new file mode 100644
index 0000000..f2d59c7
--- /dev/null
+++ b/opengl/tests/gldual/res/layout/gldual_activity.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2007 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+  
+          http://www.apache.org/licenses/LICENSE-2.0
+  
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/text"
+
+    android:orientation="vertical"
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent">
+  <android.opengl.GLSurfaceView android:id="@+id/gl1"
+	android:layout_width="fill_parent"
+	    android:layout_height="0dip"
+	    android:layout_weight="1" />
+  <com.android.gldual.GLDualGL2View android:id="@+id/gl2"
+	android:layout_width="fill_parent"
+            android:layout_height="0dip"
+            android:layout_weight="1" />
+</LinearLayout>
diff --git a/opengl/tests/gldual/res/values/strings.xml b/opengl/tests/gldual/res/values/strings.xml
new file mode 100644
index 0000000..4267dff
--- /dev/null
+++ b/opengl/tests/gldual/res/values/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+**
+** Copyright 2006, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License"); 
+** you may not use this file except in compliance with the License. 
+** You may obtain a copy of the License at 
+**
+**     http://www.apache.org/licenses/LICENSE-2.0 
+**
+** Unless required by applicable law or agreed to in writing, software 
+** distributed under the License is distributed on an "AS IS" BASIS, 
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
+** See the License for the specific language governing permissions and 
+** limitations under the License.
+*/
+-->
+
+<!-- This file contains resource definitions for displayed strings, allowing
+     them to be changed based on the locale and options. -->
+
+<resources>
+    <!-- Simple strings. -->
+    <string name="gldual_activity">GLDual</string>
+
+</resources>
+
diff --git a/opengl/tests/gldual/src/com/android/gldual/GLDualActivity.java b/opengl/tests/gldual/src/com/android/gldual/GLDualActivity.java
new file mode 100644
index 0000000..a4f25fa
--- /dev/null
+++ b/opengl/tests/gldual/src/com/android/gldual/GLDualActivity.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.gldual;
+
+import android.app.Activity;
+import android.content.Context;
+import android.opengl.GLSurfaceView;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.LinearLayout;
+
+
+public class GLDualActivity extends Activity {
+
+    GLSurfaceView mGLView;
+    GLDualGL2View mGL2View;
+
+    @Override protected void onCreate(Bundle icicle) {
+        super.onCreate(icicle);
+        View root = getLayoutInflater().inflate(R.layout.gldual_activity, null);
+        mGLView = (GLSurfaceView) root.findViewById(R.id.gl1);
+        mGLView.setRenderer(new TriangleRenderer());
+        mGL2View = (GLDualGL2View) root.findViewById(R.id.gl2);
+        setContentView(root);
+    }
+
+    @Override protected void onPause() {
+        super.onPause();
+        mGLView.onPause();
+        mGL2View.onPause();
+    }
+
+    @Override protected void onResume() {
+        super.onResume();
+        mGLView.onResume();
+        mGL2View.onResume();
+    }
+}
diff --git a/opengl/tests/gldual/src/com/android/gldual/GLDualGL2View.java b/opengl/tests/gldual/src/com/android/gldual/GLDualGL2View.java
new file mode 100644
index 0000000..8f5e347
--- /dev/null
+++ b/opengl/tests/gldual/src/com/android/gldual/GLDualGL2View.java
@@ -0,0 +1,299 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.gldual;
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+import javax.microedition.khronos.egl.EGL10;
+import javax.microedition.khronos.egl.EGLConfig;
+import javax.microedition.khronos.egl.EGLContext;
+import javax.microedition.khronos.egl.EGLDisplay;
+import javax.microedition.khronos.opengles.GL10;
+
+import android.content.Context;
+import android.opengl.GLSurfaceView;
+import android.util.AttributeSet;
+import android.util.Log;
+
+/**
+ * An implementation of SurfaceView that uses the dedicated surface for
+ * displaying an OpenGL animation.  This allows the animation to run in a
+ * separate thread, without requiring that it be driven by the update mechanism
+ * of the view hierarchy.
+ *
+ * The application-specific rendering code is delegated to a GLView.Renderer
+ * instance.
+ */
+class GLDualGL2View extends GLSurfaceView {
+    private static String TAG = "GLDualGL2View";
+
+    public GLDualGL2View(Context context) {
+        super(context);
+        init(false, 0, 0);
+    }
+
+    public GLDualGL2View(Context context, AttributeSet set) {
+        super(context, set);
+        init(false, 0, 0);
+    }
+
+    public GLDualGL2View(Context context, boolean translucent, int depth, int stencil) {
+        super(context);
+        init(translucent, depth, stencil);
+    }
+
+    private void init(boolean translucent, int depth, int stencil) {
+        setEGLContextFactory(new ContextFactory());
+        setEGLConfigChooser( translucent ?
+              new ConfigChooser(8,8,8,8, depth, stencil) :
+              new ConfigChooser(5,6,5,0, depth, stencil));
+        setRenderer(new Renderer());
+    }
+
+    private static class ContextFactory implements GLSurfaceView.EGLContextFactory {
+        private static int EGL_CONTEXT_CLIENT_VERSION = 0x3098;
+        public EGLContext createContext(EGL10 egl, EGLDisplay display, EGLConfig eglConfig) {
+            Log.w(TAG, "creating OpenGL ES 2.0 context");
+            checkEglError("Before eglCreateContext", egl);
+            int[] attrib_list = {EGL_CONTEXT_CLIENT_VERSION, 2, EGL10.EGL_NONE };
+            EGLContext context = egl.eglCreateContext(display, eglConfig, EGL10.EGL_NO_CONTEXT, attrib_list);
+            checkEglError("After eglCreateContext", egl);
+            return context;
+        }
+
+        public void destroyContext(EGL10 egl, EGLDisplay display, EGLContext context) {
+            egl.eglDestroyContext(display, context);
+        }
+    }
+
+    private static void checkEglError(String prompt, EGL10 egl) {
+        int error;
+        while ((error = egl.eglGetError()) != EGL10.EGL_SUCCESS) {
+            Log.e(TAG, String.format("%s: EGL error: 0x%x", prompt, error));
+        }
+    }
+
+    private static class ConfigChooser implements GLSurfaceView.EGLConfigChooser {
+        private static int EGL_OPENGL_ES2_BIT = 4;
+        private static int[] s_configAttribs2 =
+        {
+            EGL10.EGL_RED_SIZE, 4,
+            EGL10.EGL_GREEN_SIZE, 4,
+            EGL10.EGL_BLUE_SIZE, 4,
+            EGL10.EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+            EGL10.EGL_NONE
+        };
+
+        public ConfigChooser(int r, int g, int b, int a, int depth, int stencil) {
+            mRedSize = r;
+            mGreenSize = g;
+            mBlueSize = b;
+            mAlphaSize = a;
+            mDepthSize = depth;
+            mStencilSize = stencil;
+        }
+
+        public EGLConfig chooseConfig(EGL10 egl, EGLDisplay display) {
+
+            int[] num_config = new int[1];
+            egl.eglChooseConfig(display, s_configAttribs2, null, 0, num_config);
+
+            int numConfigs = num_config[0];
+
+            if (numConfigs <= 0) {
+                throw new IllegalArgumentException("No configs match configSpec");
+            }
+            EGLConfig[] configs = new EGLConfig[numConfigs];
+            egl.eglChooseConfig(display, s_configAttribs2, configs, numConfigs, num_config);
+            // printConfigs(egl, display, configs);
+            return chooseConfig(egl, display, configs);
+        }
+
+        public EGLConfig chooseConfig(EGL10 egl, EGLDisplay display,
+                EGLConfig[] configs) {
+            EGLConfig closestConfig = null;
+            int closestDistance = 1000;
+            for(EGLConfig config : configs) {
+                int d = findConfigAttrib(egl, display, config,
+                        EGL10.EGL_DEPTH_SIZE, 0);
+                int s = findConfigAttrib(egl, display, config,
+                        EGL10.EGL_STENCIL_SIZE, 0);
+                if (d >= mDepthSize && s>= mStencilSize) {
+                    int r = findConfigAttrib(egl, display, config,
+                            EGL10.EGL_RED_SIZE, 0);
+                    int g = findConfigAttrib(egl, display, config,
+                             EGL10.EGL_GREEN_SIZE, 0);
+                    int b = findConfigAttrib(egl, display, config,
+                              EGL10.EGL_BLUE_SIZE, 0);
+                    int a = findConfigAttrib(egl, display, config,
+                            EGL10.EGL_ALPHA_SIZE, 0);
+                    int distance = Math.abs(r - mRedSize)
+                                + Math.abs(g - mGreenSize)
+                                + Math.abs(b - mBlueSize)
+                                + Math.abs(a - mAlphaSize);
+                    if (distance < closestDistance) {
+                        closestDistance = distance;
+                        closestConfig = config;
+                    }
+                }
+            }
+            return closestConfig;
+        }
+
+        private int findConfigAttrib(EGL10 egl, EGLDisplay display,
+                EGLConfig config, int attribute, int defaultValue) {
+
+            if (egl.eglGetConfigAttrib(display, config, attribute, mValue)) {
+                return mValue[0];
+            }
+            return defaultValue;
+        }
+
+        private void printConfigs(EGL10 egl, EGLDisplay display,
+            EGLConfig[] configs) {
+            int numConfigs = configs.length;
+            Log.w(TAG, String.format("%d configurations", numConfigs));
+            for (int i = 0; i < numConfigs; i++) {
+                Log.w(TAG, String.format("Configuration %d:\n", i));
+                printConfig(egl, display, configs[i]);
+            }
+        }
+
+        private void printConfig(EGL10 egl, EGLDisplay display,
+                EGLConfig config) {
+            int[] attributes = {
+                    EGL10.EGL_BUFFER_SIZE,
+                    EGL10.EGL_ALPHA_SIZE,
+                    EGL10.EGL_BLUE_SIZE,
+                    EGL10.EGL_GREEN_SIZE,
+                    EGL10.EGL_RED_SIZE,
+                    EGL10.EGL_DEPTH_SIZE,
+                    EGL10.EGL_STENCIL_SIZE,
+                    EGL10.EGL_CONFIG_CAVEAT,
+                    EGL10.EGL_CONFIG_ID,
+                    EGL10.EGL_LEVEL,
+                    EGL10.EGL_MAX_PBUFFER_HEIGHT,
+                    EGL10.EGL_MAX_PBUFFER_PIXELS,
+                    EGL10.EGL_MAX_PBUFFER_WIDTH,
+                    EGL10.EGL_NATIVE_RENDERABLE,
+                    EGL10.EGL_NATIVE_VISUAL_ID,
+                    EGL10.EGL_NATIVE_VISUAL_TYPE,
+                    0x3030, // EGL10.EGL_PRESERVED_RESOURCES,
+                    EGL10.EGL_SAMPLES,
+                    EGL10.EGL_SAMPLE_BUFFERS,
+                    EGL10.EGL_SURFACE_TYPE,
+                    EGL10.EGL_TRANSPARENT_TYPE,
+                    EGL10.EGL_TRANSPARENT_RED_VALUE,
+                    EGL10.EGL_TRANSPARENT_GREEN_VALUE,
+                    EGL10.EGL_TRANSPARENT_BLUE_VALUE,
+                    0x3039, // EGL10.EGL_BIND_TO_TEXTURE_RGB,
+                    0x303A, // EGL10.EGL_BIND_TO_TEXTURE_RGBA,
+                    0x303B, // EGL10.EGL_MIN_SWAP_INTERVAL,
+                    0x303C, // EGL10.EGL_MAX_SWAP_INTERVAL,
+                    EGL10.EGL_LUMINANCE_SIZE,
+                    EGL10.EGL_ALPHA_MASK_SIZE,
+                    EGL10.EGL_COLOR_BUFFER_TYPE,
+                    EGL10.EGL_RENDERABLE_TYPE,
+                    0x3042 // EGL10.EGL_CONFORMANT
+            };
+            String[] names = {
+                    "EGL_BUFFER_SIZE",
+                    "EGL_ALPHA_SIZE",
+                    "EGL_BLUE_SIZE",
+                    "EGL_GREEN_SIZE",
+                    "EGL_RED_SIZE",
+                    "EGL_DEPTH_SIZE",
+                    "EGL_STENCIL_SIZE",
+                    "EGL_CONFIG_CAVEAT",
+                    "EGL_CONFIG_ID",
+                    "EGL_LEVEL",
+                    "EGL_MAX_PBUFFER_HEIGHT",
+                    "EGL_MAX_PBUFFER_PIXELS",
+                    "EGL_MAX_PBUFFER_WIDTH",
+                    "EGL_NATIVE_RENDERABLE",
+                    "EGL_NATIVE_VISUAL_ID",
+                    "EGL_NATIVE_VISUAL_TYPE",
+                    "EGL_PRESERVED_RESOURCES",
+                    "EGL_SAMPLES",
+                    "EGL_SAMPLE_BUFFERS",
+                    "EGL_SURFACE_TYPE",
+                    "EGL_TRANSPARENT_TYPE",
+                    "EGL_TRANSPARENT_RED_VALUE",
+                    "EGL_TRANSPARENT_GREEN_VALUE",
+                    "EGL_TRANSPARENT_BLUE_VALUE",
+                    "EGL_BIND_TO_TEXTURE_RGB",
+                    "EGL_BIND_TO_TEXTURE_RGBA",
+                    "EGL_MIN_SWAP_INTERVAL",
+                    "EGL_MAX_SWAP_INTERVAL",
+                    "EGL_LUMINANCE_SIZE",
+                    "EGL_ALPHA_MASK_SIZE",
+                    "EGL_COLOR_BUFFER_TYPE",
+                    "EGL_RENDERABLE_TYPE",
+                    "EGL_CONFORMANT"
+            };
+            int[] value = new int[1];
+            for (int i = 0; i < attributes.length; i++) {
+                int attribute = attributes[i];
+                String name = names[i];
+                if ( egl.eglGetConfigAttrib(display, config, attribute, value)) {
+                    Log.w(TAG, String.format("  %s: %d\n", name, value[0]));
+                } else {
+                    // Log.w(TAG, String.format("  %s: failed\n", name));
+                    while (egl.eglGetError() != EGL10.EGL_SUCCESS);
+                }
+            }
+        }
+
+        // Subclasses can adjust these values:
+        protected int mRedSize;
+        protected int mGreenSize;
+        protected int mBlueSize;
+        protected int mAlphaSize;
+        protected int mDepthSize;
+        protected int mStencilSize;
+        private int[] mValue = new int[1];
+    }
+
+    private static class Renderer implements GLSurfaceView.Renderer {
+        public void onDrawFrame(GL10 gl) {
+            GLDualLib.step();
+        }
+
+        public void onSurfaceChanged(GL10 gl, int width, int height) {
+            GLDualLib.init(width, height);
+        }
+
+        public void onSurfaceCreated(GL10 gl, EGLConfig config) {
+            // Do nothing.
+        }
+    }
+}
+
diff --git a/opengl/tests/gldual/src/com/android/gldual/GLDualLib.java b/opengl/tests/gldual/src/com/android/gldual/GLDualLib.java
new file mode 100644
index 0000000..d8f765e
--- /dev/null
+++ b/opengl/tests/gldual/src/com/android/gldual/GLDualLib.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.gldual;
+
+// Wrapper for native library
+
+public class GLDualLib {
+
+     static {
+         System.loadLibrary("gldualjni");
+     }
+
+    /**
+     * @param width the current view width
+     * @param height the current view height
+     */
+     public static native void init(int width, int height);
+     public static native void step();
+}
diff --git a/opengl/tests/gldual/src/com/android/gldual/TriangleRenderer.java b/opengl/tests/gldual/src/com/android/gldual/TriangleRenderer.java
new file mode 100644
index 0000000..098c4d2
--- /dev/null
+++ b/opengl/tests/gldual/src/com/android/gldual/TriangleRenderer.java
@@ -0,0 +1,149 @@
+package com.android.gldual;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.FloatBuffer;
+import java.nio.ShortBuffer;
+
+import javax.microedition.khronos.egl.EGLConfig;
+import javax.microedition.khronos.opengles.GL10;
+
+import android.opengl.GLSurfaceView;
+import android.opengl.GLU;
+import android.os.SystemClock;
+
+public class TriangleRenderer implements GLSurfaceView.Renderer{
+
+    public TriangleRenderer() {
+        mTriangle = new Triangle();
+    }
+
+    public void onSurfaceCreated(GL10 gl, EGLConfig config) {
+        /*
+         * By default, OpenGL enables features that improve quality
+         * but reduce performance. One might want to tweak that
+         * especially on software renderer.
+         */
+        gl.glDisable(GL10.GL_DITHER);
+
+        /*
+         * Some one-time OpenGL initialization can be made here
+         * probably based on features of this particular context
+         */
+        gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT,
+                GL10.GL_FASTEST);
+
+        gl.glClearColor(.5f, .5f, .5f, 1);
+        gl.glShadeModel(GL10.GL_SMOOTH);
+    }
+
+    public void onDrawFrame(GL10 gl) {
+        /*
+         * By default, OpenGL enables features that improve quality
+         * but reduce performance. One might want to tweak that
+         * especially on software renderer.
+         */
+        gl.glDisable(GL10.GL_DITHER);
+
+        /*
+         * Usually, the first thing one might want to do is to clear
+         * the screen. The most efficient way of doing this is to use
+         * glClear().
+         */
+
+        gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
+
+        /*
+         * Now we're ready to draw some 3D objects
+         */
+
+        gl.glMatrixMode(GL10.GL_MODELVIEW);
+        gl.glLoadIdentity();
+
+        GLU.gluLookAt(gl, 0, 0, -5, 0f, 0f, 0f, 0f, 1.0f, 0.0f);
+
+        gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
+
+        long time = SystemClock.uptimeMillis() % 4000L;
+        float angle = 0.090f * ((int) time);
+
+        gl.glRotatef(angle, 0, 0, 1.0f);
+
+        mTriangle.draw(gl);
+    }
+
+    public void onSurfaceChanged(GL10 gl, int w, int h) {
+        gl.glViewport(0, 0, w, h);
+
+        /*
+        * Set our projection matrix. This doesn't have to be done
+        * each time we draw, but usually a new projection needs to
+        * be set when the viewport is resized.
+        */
+
+        float ratio = (float) w / h;
+        gl.glMatrixMode(GL10.GL_PROJECTION);
+        gl.glLoadIdentity();
+        gl.glFrustumf(-ratio, ratio, -1, 1, 3, 7);
+
+    }
+
+    private Triangle mTriangle;
+}
+
+class Triangle {
+    public Triangle() {
+
+        // Buffers to be passed to gl*Pointer() functions
+        // must be direct, i.e., they must be placed on the
+        // native heap where the garbage collector cannot
+        // move them.
+        //
+        // Buffers with multi-byte datatypes (e.g., short, int, float)
+        // must have their byte order set to native order
+
+        ByteBuffer vbb = ByteBuffer.allocateDirect(VERTS * 3 * 4);
+        vbb.order(ByteOrder.nativeOrder());
+        mFVertexBuffer = vbb.asFloatBuffer();
+
+        ByteBuffer tbb = ByteBuffer.allocateDirect(VERTS * 2 * 4);
+        tbb.order(ByteOrder.nativeOrder());
+
+        ByteBuffer ibb = ByteBuffer.allocateDirect(VERTS * 2);
+        ibb.order(ByteOrder.nativeOrder());
+        mIndexBuffer = ibb.asShortBuffer();
+
+        // A unit-sided equalateral triangle centered on the origin.
+        float[] coords = {
+                // X, Y, Z
+                -0.5f, -0.25f, 0,
+                 0.5f, -0.25f, 0,
+                 0.0f,  0.559016994f, 0
+        };
+
+        for (int i = 0; i < VERTS; i++) {
+            for(int j = 0; j < 3; j++) {
+                mFVertexBuffer.put(coords[i*3+j] * 2.0f);
+            }
+        }
+
+        for(int i = 0; i < VERTS; i++) {
+            mIndexBuffer.put((short) i);
+        }
+
+        mFVertexBuffer.position(0);
+        mIndexBuffer.position(0);
+    }
+
+    public void draw(GL10 gl) {
+        gl.glFrontFace(GL10.GL_CCW);
+        gl.glVertexPointer(3, GL10.GL_FLOAT, 0, mFVertexBuffer);
+        gl.glDrawElements(GL10.GL_TRIANGLE_STRIP, VERTS,
+                GL10.GL_UNSIGNED_SHORT, mIndexBuffer);
+    }
+
+    private final static int VERTS = 3;
+
+    private FloatBuffer mFVertexBuffer;
+    private ShortBuffer mIndexBuffer;
+}