diff --git a/services/surfaceflinger/RenderEngine/GLES10RenderEngine.cpp b/services/surfaceflinger/RenderEngine/GLES10RenderEngine.cpp
new file mode 100644
index 0000000..9a47568
--- /dev/null
+++ b/services/surfaceflinger/RenderEngine/GLES10RenderEngine.cpp
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2013 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.
+ */
+
+#include <GLES/gl.h>
+
+#include <cutils/compiler.h>
+
+#include "GLES10RenderEngine.h"
+
+// ---------------------------------------------------------------------------
+namespace android {
+// ---------------------------------------------------------------------------
+
+GLES10RenderEngine::~GLES10RenderEngine() {
+}
+
+void GLES10RenderEngine::setupLayerBlending(
+    bool premultipliedAlpha, bool opaque, int alpha) {
+    // OpenGL ES 1.0 doesn't support texture combiners.
+    // This path doesn't properly handle opaque layers that have non-opaque
+    // alpha values. The alpha channel will be copied into the framebuffer or
+    // screenshot, so if the framebuffer or screenshot is blended on top of
+    // something else,  whatever is below the window will incorrectly show
+    // through.
+    if (CC_UNLIKELY(alpha < 0xFF)) {
+        GLfloat floatAlpha = alpha * (1.0f / 255.0f);
+        if (premultipliedAlpha) {
+            glColor4f(floatAlpha, floatAlpha, floatAlpha, floatAlpha);
+        } else {
+            glColor4f(1.0f, 1.0f, 1.0f, floatAlpha);
+        }
+        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+    } else {
+        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+    }
+
+    if (alpha < 0xFF || !opaque) {
+        glEnable(GL_BLEND);
+        glBlendFunc(premultipliedAlpha ? GL_ONE : GL_SRC_ALPHA,
+                    GL_ONE_MINUS_SRC_ALPHA);
+    } else {
+        glDisable(GL_BLEND);
+    }
+}
+
+// ---------------------------------------------------------------------------
+}; // namespace android
+// ---------------------------------------------------------------------------
diff --git a/services/surfaceflinger/RenderEngine/GLES10RenderEngine.h b/services/surfaceflinger/RenderEngine/GLES10RenderEngine.h
new file mode 100644
index 0000000..f9c7c04
--- /dev/null
+++ b/services/surfaceflinger/RenderEngine/GLES10RenderEngine.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2013 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.
+ */
+
+
+#ifndef SF_GLES10RENDERENGINE_H_
+#define SF_GLES10RENDERENGINE_H_
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include "GLES11RenderEngine.h"
+
+// ---------------------------------------------------------------------------
+namespace android {
+// ---------------------------------------------------------------------------
+
+class GLES10RenderEngine : public GLES11RenderEngine {
+    virtual ~GLES10RenderEngine();
+protected:
+    virtual void setupLayerBlending(bool premultipliedAlpha, bool opaque, int alpha);
+};
+
+// ---------------------------------------------------------------------------
+}; // namespace android
+// ---------------------------------------------------------------------------
+
+#endif /* SF_GLES10RENDERENGINE_H_ */
diff --git a/services/surfaceflinger/RenderEngine/GLES11RenderEngine.cpp b/services/surfaceflinger/RenderEngine/GLES11RenderEngine.cpp
new file mode 100644
index 0000000..19499c9
--- /dev/null
+++ b/services/surfaceflinger/RenderEngine/GLES11RenderEngine.cpp
@@ -0,0 +1,217 @@
+/*
+ * Copyright 2013 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.
+ */
+
+#include <GLES/gl.h>
+
+#include <utils/String8.h>
+#include <cutils/compiler.h>
+
+#include "GLES11RenderEngine.h"
+#include "GLExtensions.h"
+
+// ---------------------------------------------------------------------------
+namespace android {
+// ---------------------------------------------------------------------------
+
+GLES11RenderEngine::GLES11RenderEngine() {
+
+    glGetIntegerv(GL_MAX_TEXTURE_SIZE, &mMaxTextureSize);
+    glGetIntegerv(GL_MAX_VIEWPORT_DIMS, mMaxViewportDims);
+
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
+    glPixelStorei(GL_PACK_ALIGNMENT, 4);
+    glEnableClientState(GL_VERTEX_ARRAY);
+    glShadeModel(GL_FLAT);
+    glDisable(GL_DITHER);
+    glDisable(GL_CULL_FACE);
+
+    struct pack565 {
+        inline uint16_t operator() (int r, int g, int b) const {
+            return (r<<11)|(g<<5)|b;
+        }
+    } pack565;
+
+    const uint16_t protTexData[] = { pack565(0x03, 0x03, 0x03) };
+    glGenTextures(1, &mProtectedTexName);
+    glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
+    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
+            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
+}
+
+GLES11RenderEngine::~GLES11RenderEngine() {
+}
+
+
+size_t GLES11RenderEngine::getMaxTextureSize() const {
+    return mMaxTextureSize;
+}
+
+size_t GLES11RenderEngine::getMaxViewportDims() const {
+    return
+        mMaxViewportDims[0] < mMaxViewportDims[1] ?
+            mMaxViewportDims[0] : mMaxViewportDims[1];
+}
+
+void GLES11RenderEngine::setViewportAndProjection(size_t w, size_t h) {
+    glViewport(0, 0, w, h);
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    // put the origin in the left-bottom corner
+    glOrthof(0, w, 0, h, 0, 1); // l=0, r=w ; b=0, t=h
+    glMatrixMode(GL_MODELVIEW);
+}
+
+void GLES11RenderEngine::setupLayerBlending(
+    bool premultipliedAlpha, bool opaque, int alpha) {
+    GLenum combineRGB;
+    GLenum combineAlpha;
+    GLenum src0Alpha;
+    GLfloat envColor[4];
+
+    if (CC_UNLIKELY(alpha < 0xFF)) {
+        // Cv = premultiplied ? Cs*alpha : Cs
+        // Av = !opaque       ? alpha*As : 1.0
+        combineRGB   = premultipliedAlpha ? GL_MODULATE : GL_REPLACE;
+        combineAlpha = !opaque            ? GL_MODULATE : GL_REPLACE;
+        src0Alpha    = GL_CONSTANT;
+        envColor[0]  = alpha * (1.0f / 255.0f);
+    } else {
+        // Cv = Cs
+        // Av = opaque ? 1.0 : As
+        combineRGB   = GL_REPLACE;
+        combineAlpha = GL_REPLACE;
+        src0Alpha    = opaque ? GL_CONSTANT : GL_TEXTURE;
+        envColor[0]  = 1.0f;
+    }
+
+    glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE);
+    glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB, combineRGB);
+    glTexEnvi(GL_TEXTURE_ENV, GL_SRC0_RGB, GL_TEXTURE);
+    glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR);
+    if (combineRGB == GL_MODULATE) {
+        glTexEnvi(GL_TEXTURE_ENV, GL_SRC1_RGB, GL_CONSTANT);
+        glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR);
+    }
+    glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, combineAlpha);
+    glTexEnvi(GL_TEXTURE_ENV, GL_SRC0_ALPHA, src0Alpha);
+    glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA);
+    if (combineAlpha == GL_MODULATE) {
+        glTexEnvi(GL_TEXTURE_ENV, GL_SRC1_ALPHA, GL_TEXTURE);
+        glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA, GL_SRC_ALPHA);
+    }
+    if (combineRGB == GL_MODULATE || src0Alpha == GL_CONSTANT) {
+        envColor[1] = envColor[0];
+        envColor[2] = envColor[0];
+        envColor[3] = envColor[0];
+        glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, envColor);
+    }
+
+    if (alpha < 0xFF || !opaque) {
+        glEnable(GL_BLEND);
+        glBlendFunc(premultipliedAlpha ? GL_ONE : GL_SRC_ALPHA,
+                    GL_ONE_MINUS_SRC_ALPHA);
+    } else {
+        glDisable(GL_BLEND);
+    }
+}
+
+void GLES11RenderEngine::setupDimLayerBlending(int alpha) {
+    glDisable(GL_TEXTURE_EXTERNAL_OES);
+    glDisable(GL_TEXTURE_2D);
+    if (alpha == 0xFF) {
+        glDisable(GL_BLEND);
+    } else {
+        glEnable(GL_BLEND);
+        glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
+    }
+    glColor4f(0, 0, 0, alpha/255.0f);
+}
+
+void GLES11RenderEngine::setupLayerTexturing(size_t textureName,
+    bool useFiltering, const float* textureMatrix) {
+    glBindTexture(GL_TEXTURE_EXTERNAL_OES, textureName);
+    GLenum filter = GL_NEAREST;
+    if (useFiltering) {
+        filter = GL_LINEAR;
+    }
+    glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MAG_FILTER, filter);
+    glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MIN_FILTER, filter);
+    glMatrixMode(GL_TEXTURE);
+    glLoadMatrixf(textureMatrix);
+    glMatrixMode(GL_MODELVIEW);
+    glDisable(GL_TEXTURE_2D);
+    glEnable(GL_TEXTURE_EXTERNAL_OES);
+}
+
+void GLES11RenderEngine::setupLayerBlackedOut() {
+    glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
+    glMatrixMode(GL_TEXTURE);
+    glLoadIdentity();
+    glMatrixMode(GL_MODELVIEW);
+    glDisable(GL_TEXTURE_EXTERNAL_OES);
+    glEnable(GL_TEXTURE_2D);
+}
+
+void GLES11RenderEngine::disableTexturing() {
+    glDisable(GL_TEXTURE_EXTERNAL_OES);
+    glDisable(GL_TEXTURE_2D);
+}
+
+void GLES11RenderEngine::disableBlending() {
+    glDisable(GL_BLEND);
+}
+
+void GLES11RenderEngine::clearWithColor(const float vertices[][2] , size_t count,
+    float red, float green, float blue, float alpha) {
+    glColor4f(red, green, blue, alpha);
+    glDisable(GL_TEXTURE_EXTERNAL_OES);
+    glDisable(GL_TEXTURE_2D);
+    glDisable(GL_BLEND);
+    glVertexPointer(2, GL_FLOAT, 0, vertices);
+    glDrawArrays(GL_TRIANGLE_FAN, 0, count);
+}
+
+void GLES11RenderEngine::drawMesh2D(
+    const float vertices[][2], const float texCoords[][2], size_t count) {
+    if (texCoords) {
+        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+        glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
+    }
+    glVertexPointer(2, GL_FLOAT, 0, vertices);
+    glDrawArrays(GL_TRIANGLE_FAN, 0, count);
+    if (texCoords) {
+        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+    }
+}
+
+void GLES11RenderEngine::dump(String8& result) {
+    const GLExtensions& extensions(GLExtensions::getInstance());
+    result.appendFormat("GLES: %s, %s, %s\n",
+            extensions.getVendor(),
+            extensions.getRenderer(),
+            extensions.getVersion());
+    result.appendFormat("%s\n", extensions.getExtension());
+}
+
+// ---------------------------------------------------------------------------
+}; // namespace android
+// ---------------------------------------------------------------------------
diff --git a/services/surfaceflinger/RenderEngine/GLES11RenderEngine.h b/services/surfaceflinger/RenderEngine/GLES11RenderEngine.h
new file mode 100644
index 0000000..15054bd
--- /dev/null
+++ b/services/surfaceflinger/RenderEngine/GLES11RenderEngine.h
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2013 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.
+ */
+
+
+#ifndef SF_GLES11RENDERENGINE_H_
+#define SF_GLES11RENDERENGINE_H_
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <GLES/gl.h>
+
+#include "RenderEngine.h"
+
+// ---------------------------------------------------------------------------
+namespace android {
+// ---------------------------------------------------------------------------
+
+class String8;
+
+class GLES11RenderEngine : public RenderEngine {
+    GLuint mProtectedTexName;
+    GLint mMaxViewportDims[2];
+    GLint mMaxTextureSize;
+
+public:
+    GLES11RenderEngine();
+
+protected:
+    virtual ~GLES11RenderEngine();
+
+    virtual void dump(String8& result);
+    virtual void setViewportAndProjection(size_t w, size_t h);
+    virtual void setupLayerBlending(bool premultipliedAlpha, bool opaque, int alpha);
+    virtual void setupDimLayerBlending(int alpha);
+    virtual void setupLayerTexturing(size_t textureName, bool useFiltering, const float* textureMatrix);
+    virtual void setupLayerBlackedOut();
+    virtual void disableTexturing();
+    virtual void disableBlending();
+
+    virtual void clearWithColor(const float vertices[][2], size_t count,
+        float red, float green, float blue, float alpha);
+
+    virtual void drawMesh2D(const float vertices[][2], const float texCoords[][2], size_t count);
+
+    virtual size_t getMaxTextureSize() const;
+    virtual size_t getMaxViewportDims() const;
+};
+
+// ---------------------------------------------------------------------------
+}; // namespace android
+// ---------------------------------------------------------------------------
+
+#endif /* SF_GLES11RENDERENGINE_H_ */
diff --git a/services/surfaceflinger/RenderEngine/GLExtensions.cpp b/services/surfaceflinger/RenderEngine/GLExtensions.cpp
new file mode 100644
index 0000000..76bbcc1
--- /dev/null
+++ b/services/surfaceflinger/RenderEngine/GLExtensions.cpp
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2010 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.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+
+#include "GLExtensions.h"
+
+namespace android {
+// ---------------------------------------------------------------------------
+
+ANDROID_SINGLETON_STATIC_INSTANCE( GLExtensions )
+
+GLExtensions::GLExtensions()
+    : mHaveFramebufferObject(false)
+{
+}
+
+void GLExtensions::initWithGLStrings(
+        GLubyte const* vendor,
+        GLubyte const* renderer,
+        GLubyte const* version,
+        GLubyte const* extensions)
+{
+    mVendor     = (char const*)vendor;
+    mRenderer   = (char const*)renderer;
+    mVersion    = (char const*)version;
+    mExtensions = (char const*)extensions;
+
+    char const* curr = (char const*)extensions;
+    char const* head = curr;
+    do {
+        head = strchr(curr, ' ');
+        String8 s(curr, head ? head-curr : strlen(curr));
+        if (s.length()) {
+            mExtensionList.add(s);
+        }
+        curr = head+1;
+    } while (head);
+
+    if (hasExtension("GL_OES_framebuffer_object")) {
+        mHaveFramebufferObject = true;
+    }
+}
+
+bool GLExtensions::hasExtension(char const* extension) const
+{
+    const String8 s(extension);
+    return mExtensionList.indexOf(s) >= 0;
+}
+
+char const* GLExtensions::getVendor() const {
+    return mVendor.string();
+}
+
+char const* GLExtensions::getRenderer() const {
+    return mRenderer.string();
+}
+
+char const* GLExtensions::getVersion() const {
+    return mVersion.string();
+}
+
+char const* GLExtensions::getExtension() const {
+    return mExtensions.string();
+}
+
+// ---------------------------------------------------------------------------
+}; // namespace android
diff --git a/services/surfaceflinger/RenderEngine/GLExtensions.h b/services/surfaceflinger/RenderEngine/GLExtensions.h
new file mode 100644
index 0000000..d81ed2a
--- /dev/null
+++ b/services/surfaceflinger/RenderEngine/GLExtensions.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2010 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.
+ */
+
+#ifndef ANDROID_SF_GLEXTENSION_H
+#define ANDROID_SF_GLEXTENSION_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/String8.h>
+#include <utils/SortedVector.h>
+#include <utils/Singleton.h>
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+#include <GLES/gl.h>
+#include <GLES/glext.h>
+
+namespace android {
+// ---------------------------------------------------------------------------
+
+class GLExtensions : public Singleton<GLExtensions>
+{
+    friend class Singleton<GLExtensions>;
+
+    bool mHaveFramebufferObject : 1;
+
+    String8 mVendor;
+    String8 mRenderer;
+    String8 mVersion;
+    String8 mExtensions;
+    SortedVector<String8> mExtensionList;
+
+    GLExtensions(const GLExtensions&);
+    GLExtensions& operator = (const GLExtensions&);
+
+protected:
+    GLExtensions();
+
+public:
+
+    inline bool haveFramebufferObject() const {
+        return mHaveFramebufferObject;
+    }
+
+    void initWithGLStrings(
+            GLubyte const* vendor,
+            GLubyte const* renderer,
+            GLubyte const* version,
+            GLubyte const* extensions);
+
+    char const* getVendor() const;
+    char const* getRenderer() const;
+    char const* getVersion() const;
+    char const* getExtension() const;
+
+    bool hasExtension(char const* extension) const;
+};
+
+
+// ---------------------------------------------------------------------------
+}; // namespace android
+
+#endif // ANDROID_SF_GLEXTENSION_H
diff --git a/services/surfaceflinger/RenderEngine/RenderEngine.cpp b/services/surfaceflinger/RenderEngine/RenderEngine.cpp
new file mode 100644
index 0000000..cb77e38
--- /dev/null
+++ b/services/surfaceflinger/RenderEngine/RenderEngine.cpp
@@ -0,0 +1,145 @@
+/*
+ * Copyright 2013 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.
+ */
+
+#include <cutils/log.h>
+
+#include "RenderEngine.h"
+#include "GLES10RenderEngine.h"
+#include "GLES11RenderEngine.h"
+#include "GLExtensions.h"
+
+// ---------------------------------------------------------------------------
+namespace android {
+// ---------------------------------------------------------------------------
+
+RenderEngine* RenderEngine::create(EGLDisplay display, EGLConfig config) {
+    // Also create our EGLContext
+    EGLint contextAttributes[] = {
+//            EGL_CONTEXT_CLIENT_VERSION, 2,
+#ifdef EGL_IMG_context_priority
+#ifdef HAS_CONTEXT_PRIORITY
+#warning "using EGL_IMG_context_priority"
+            EGL_CONTEXT_PRIORITY_LEVEL_IMG, EGL_CONTEXT_PRIORITY_HIGH_IMG,
+#endif
+#endif
+            EGL_NONE, EGL_NONE
+    };
+
+    EGLContext ctxt = eglCreateContext(display, config, NULL, contextAttributes);
+    if (ctxt == EGL_NO_CONTEXT) {
+        // maybe ES 2.x is not supported
+        ALOGW("can't create an ES 2.x context, trying 1.x");
+        ctxt = eglCreateContext(display, config, NULL, contextAttributes + 2);
+    }
+
+    // if can't create a GL context, we can only abort.
+    LOG_ALWAYS_FATAL_IF(ctxt==EGL_NO_CONTEXT, "EGLContext creation failed");
+
+
+    // now figure out what version of GL did we actually get
+    // NOTE: a dummy surface is not needed if KHR_create_context is supported
+
+    EGLint attribs[] = { EGL_WIDTH, 1, EGL_HEIGHT, 1, EGL_NONE, EGL_NONE };
+    EGLSurface dummy = eglCreatePbufferSurface(display, config, attribs);
+    LOG_ALWAYS_FATAL_IF(dummy==EGL_NO_SURFACE, "can't create dummy pbuffer");
+    EGLBoolean success = eglMakeCurrent(display, dummy, dummy, ctxt);
+    LOG_ALWAYS_FATAL_IF(!success, "can't make dummy pbuffer current");
+
+    GLExtensions& extensions(GLExtensions::getInstance());
+    extensions.initWithGLStrings(
+            glGetString(GL_VENDOR),
+            glGetString(GL_RENDERER),
+            glGetString(GL_VERSION),
+            glGetString(GL_EXTENSIONS));
+
+    GlesVersion version = parseGlesVersion( extensions.getVersion() );
+
+    // initialize the renderer while GL is current
+
+    RenderEngine* engine = NULL;
+    switch (version) {
+    case GLES_VERSION_1_0:
+        engine = new GLES10RenderEngine();
+        break;
+    case GLES_VERSION_1_1:
+        engine = new GLES11RenderEngine();
+        break;
+    case GLES_VERSION_2_0:
+    case GLES_VERSION_3_0:
+        //engine = new GLES20RenderEngine();
+        break;
+    }
+    engine->setEGLContext(ctxt);
+
+    ALOGI("OpenGL ES informations:");
+    ALOGI("vendor    : %s", extensions.getVendor());
+    ALOGI("renderer  : %s", extensions.getRenderer());
+    ALOGI("version   : %s", extensions.getVersion());
+    ALOGI("extensions: %s", extensions.getExtension());
+    ALOGI("GL_MAX_TEXTURE_SIZE = %d", engine->getMaxTextureSize());
+    ALOGI("GL_MAX_VIEWPORT_DIMS = %d", engine->getMaxViewportDims());
+
+    eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+    eglDestroySurface(display, dummy);
+
+    return engine;
+}
+
+RenderEngine::RenderEngine() : mEGLContext(EGL_NO_CONTEXT) {
+}
+
+RenderEngine::~RenderEngine() {
+}
+
+void RenderEngine::setEGLContext(EGLContext ctxt) {
+    mEGLContext = ctxt;
+}
+
+EGLContext RenderEngine::getEGLContext() const {
+    return mEGLContext;
+}
+
+void RenderEngine::checkErrors() const {
+    do {
+        // there could be more than one error flag
+        GLenum error = glGetError();
+        if (error == GL_NO_ERROR)
+            break;
+        ALOGE("GL error 0x%04x", int(error));
+    } while (true);
+}
+
+RenderEngine::GlesVersion RenderEngine::parseGlesVersion(const char* str) {
+    int major, minor;
+    if (sscanf(str, "OpenGL ES-CM %d.%d", &major, &minor) != 2) {
+        if (sscanf(str, "OpenGL ES %d.%d", &major, &minor) != 2) {
+            ALOGW("Unable to parse GL_VERSION string: \"%s\"", str);
+            return GLES_VERSION_1_0;
+        }
+    }
+
+    if (major == 1 && minor == 0) return GLES_VERSION_1_0;
+    if (major == 1 && minor >= 1) return GLES_VERSION_1_1;
+    if (major == 2 && minor >= 0) return GLES_VERSION_2_0;
+    if (major == 3 && minor >= 0) return GLES_VERSION_3_0;
+
+    ALOGW("Unrecognized OpenGL ES version: %d.%d", major, minor);
+    return GLES_VERSION_1_0;
+}
+
+// ---------------------------------------------------------------------------
+}; // namespace android
+// ---------------------------------------------------------------------------
diff --git a/services/surfaceflinger/RenderEngine/RenderEngine.h b/services/surfaceflinger/RenderEngine/RenderEngine.h
new file mode 100644
index 0000000..e43bfa4
--- /dev/null
+++ b/services/surfaceflinger/RenderEngine/RenderEngine.h
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2013 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.
+ */
+
+
+#ifndef SF_RENDERENGINE_H_
+#define SF_RENDERENGINE_H_
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <EGL/egl.h>
+
+// ---------------------------------------------------------------------------
+namespace android {
+// ---------------------------------------------------------------------------
+
+class String8;
+
+class RenderEngine {
+    enum GlesVersion {
+        GLES_VERSION_1_0    = 0x10000,
+        GLES_VERSION_1_1    = 0x10001,
+        GLES_VERSION_2_0    = 0x20000,
+        GLES_VERSION_3_0    = 0x30000,
+    };
+    static GlesVersion parseGlesVersion(const char* str);
+
+    EGLContext mEGLContext;
+    void setEGLContext(EGLContext ctxt);
+
+protected:
+    RenderEngine();
+    virtual ~RenderEngine() = 0;
+
+public:
+    static RenderEngine* create(EGLDisplay display, EGLConfig config);
+
+    virtual void checkErrors() const;
+
+    virtual void dump(String8& result) = 0;
+    virtual void setViewportAndProjection(size_t w, size_t h) = 0;
+    virtual void setupLayerBlending(bool premultipliedAlpha, bool opaque, int alpha) = 0;
+    virtual void setupDimLayerBlending(int alpha) = 0;
+    virtual void setupLayerTexturing(size_t textureName, bool useFiltering, const float* textureMatrix) = 0;
+    virtual void setupLayerBlackedOut() = 0;
+
+    virtual void disableTexturing() = 0;
+    virtual void disableBlending() = 0;
+
+    virtual void clearWithColor(const float vertices[][2], size_t count,
+        float red, float green, float blue, float alpha) = 0;
+
+    virtual void drawMesh2D(const float vertices[][2], const float texCoords[][2], size_t count) = 0;
+
+    virtual size_t getMaxTextureSize() const = 0;
+    virtual size_t getMaxViewportDims() const = 0;
+
+    EGLContext getEGLContext() const;
+};
+
+// ---------------------------------------------------------------------------
+}; // namespace android
+// ---------------------------------------------------------------------------
+
+#endif /* SF_RENDERENGINE_H_ */