Initial commit of libAgl2 using Pixelflinger2 in external/mesa3d

Somewhat functional, refer to README for details.
Need to enable Android.mk to build.
It builds libGLES_android.so, which needs to replace
 the one in system/lib/egl built by libagl.

Change-Id: Iec3aaa8f3963a4185d81955cd24019eb0c4a5850
Signed-off-by: David Li <davidxli@google.com>

11 files changed, 4162 insertions, 0 deletions

diff --git a/opengl/libagl2/Android.mk b/opengl/libagl2/Android.mk
new file mode 100644
index 0000000..564932f
--- /dev/null
+++ b/opengl/libagl2/Android.mk
@@ -0,0 +1,58 @@
+LOCAL_PATH:= $(call my-dir)
+
+#
+# Build the software OpenGL ES library
+#
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES:= \
+	src/api.cpp \
+	src/egl.cpp \
+    src/get.cpp \
+	src/shader.cpp \
+	src/state.cpp \
+	src/texture.cpp \
+	src/vertex.cpp
+
+LOCAL_C_INCLUDES :=	\
+    $(LOCAL_PATH) \
+    external/mesa3d/include \
+    external/mesa3d/src \
+    external/stlport/stlport \
+    bionic
+    
+#LOCAL_CFLAGS += -DLOG_TAG=\"libagl2\"
+#LOCAL_CFLAGS += -DGL_GLEXT_PROTOTYPES -DEGL_EGLEXT_PROTOTYPES
+#LOCAL_CFLAGS += -fvisibility=hidden
+#LOCAL_CFLAGS += -O0 -g -DDEBUG -UNDEBUG
+LOCAL_CFLAGS += -O3
+LOCAL_STATIC_LIBRARIES := libMesa
+LOCAL_SHARED_LIBRARIES := libstlport libcutils libhardware libutils libbcc libdl
+LOCAL_LDLIBS := -lpthread
+
+ifeq ($(TARGET_ARCH),arm)
+	LOCAL_CFLAGS += -fstrict-aliasing
+endif
+
+ifeq ($(ARCH_ARM_HAVE_TLS_REGISTER),true)
+    LOCAL_CFLAGS += -DHAVE_ARM_TLS_REGISTER
+endif
+
+ifneq ($(TARGET_SIMULATOR),true)
+    # we need to access the private Bionic header <bionic_tls.h>
+    # on ARM platforms, we need to mirror the ARCH_ARM_HAVE_TLS_REGISTER
+    # behavior from the bionic Android.mk file
+    ifeq ($(TARGET_ARCH)-$(ARCH_ARM_HAVE_TLS_REGISTER),arm-true)
+        LOCAL_CFLAGS += -DHAVE_ARM_TLS_REGISTER
+    endif
+    LOCAL_C_INCLUDES += bionic/libc/private
+endif
+
+LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/egl
+#replace libagl for now
+LOCAL_MODULE:= libGLES_android
+LOCAL_MODULE_TAGS := eng
+
+## Disable this makefile for now
+## include $(BUILD_SHARED_LIBRARY)
diff --git a/opengl/libagl2/README b/opengl/libagl2/README
new file mode 100644
index 0000000..34746d3
--- /dev/null
+++ b/opengl/libagl2/README
@@ -0,0 +1,26 @@
+libAgl2 provides software GL ES 2.0 implementation using Pixelflinger2 in external/mesa3d
+
+To build, enable Android.mk, which builds libGLES_android.so, then replace the one built from libAgl in system/lib/egl.
+ES 1.0 functions are not implemented and will cause exit, so do not setprop debug.egl.hw 0 until launcher is loaded.
+
+All functions have little to none error checking.
+Not thread safe, Pixelflinger2 uses some static data.
+
+Most shader functions are implemented, however, most Get* functions for shaders/programs/uniforms/attribs are not.
+No name system for shaders/programs, just using the pointers as names.
+
+Basic glTexImage2D, glTexSubImage2D, glCopyImage2D and glCopySubImage2D are implemented, with a range of 8/16/24/32bpp formats.
+Cube map support is minimal. No mipmapping.
+TexParameter is mostly implemented, supports texcoord wrap modes, and only linear for both min and mag, or nearest for both min and mag filtering.
+Texture names are implemented, but bad.
+
+Frame buffer and render buffers are not implemented.
+
+Depth and stencil are implemented, but not tested.
+Blending seems to work.
+Colorbuffer supports RGBA_8888 and RGB_565.
+
+Vertex buffer objects are implemented.
+Some GL_TRIANGLES and GL_TRIANGLE_STRIPS modes for glDrawArrays and glDrawElements are implemented, but vertex order is probably wrong so culling is disabled.
+
+Basic apps should work, and some libhwui should work, except for frame buffer operations, which will cause exit.
diff --git a/opengl/libagl2/libagl2.project b/opengl/libagl2/libagl2.project
new file mode 100644
index 0000000..f234421
--- /dev/null
+++ b/opengl/libagl2/libagl2.project
@@ -0,0 +1,108 @@
+<?xml version="1.0" encoding="utf-8"?>
+<CodeLite_Project Name="libagl2" InternalType="Console">
+  <Plugins>
+    <Plugin Name="qmake">
+      <![CDATA[00010001N0005Debug000000000000]]>
+    </Plugin>
+  </Plugins>
+  <Description/>
+  <Dependencies/>
+  <Dependencies Name="Release"/>
+  <VirtualDirectory Name="src">
+    <File Name="src/egl.cpp"/>
+    <File Name="src/api.cpp"/>
+    <File Name="src/gles2context.h"/>
+    <File Name="src/shader.cpp"/>
+    <File Name="src/vertex.cpp"/>
+    <File Name="src/state.cpp"/>
+    <File Name="src/texture.cpp"/>
+    <File Name="src/get.cpp"/>
+  </VirtualDirectory>
+  <VirtualDirectory Name="include"/>
+  <Settings Type="Executable">
+    <Configuration Name="Debug" CompilerType="gnu gcc" DebuggerType="GNU gdb debugger" Type="Executable" BuildCmpWithGlobalSettings="append" BuildLnkWithGlobalSettings="append" BuildResWithGlobalSettings="append">
+      <Compiler Options="-g;-m32" Required="yes" PreCompiledHeader="">
+        <IncludePath Value="/usr/include/c++/4.4"/>
+        <IncludePath Value="/usr/include/c++/4.4/ext"/>
+        <IncludePath Value="."/>
+        <IncludePath Value="include"/>
+        <IncludePath Value="../../../../external/mesa3d/include"/>
+        <IncludePath Value="../../../../external/mesa3d/src"/>
+        <IncludePath Value="../../../../hardware/libhardware/include"/>
+        <IncludePath Value="../../../../system/core/include"/>
+        <IncludePath Value="../include"/>
+        <IncludePath Value="../../include"/>
+        <IncludePath Value="../../../../development/ndk/platforms/android-9/include"/>
+        <IncludePath Value="../../../../bionic/libc/include/"/>
+        <IncludePath Value="/../../../../development/ndk/platforms/android-5/arch-x86/include"/>
+        <IncludePath Value="../../../../bionic/libc/arch-x86/include"/>
+        <IncludePath Value="../../../../bionic/libc/kernel/arch-x86"/>
+        <IncludePath Value="/../../../../external/kernel-headers/original"/>
+        <IncludePath Value="../../../../prebuilt/ndk/android-ndk-r4/platforms/android-8/arch-x86/usr/include"/>
+      </Compiler>
+      <Linker Options="-m32;-lstdc++" Required="yes"/>
+      <ResourceCompiler Options="" Required="no"/>
+      <General OutputFile="$(IntermediateDirectory)/$(ProjectName)" IntermediateDirectory="./Debug" Command="./$(ProjectName)" CommandArguments="" WorkingDirectory="$(IntermediateDirectory)" PauseExecWhenProcTerminates="yes"/>
+      <Debugger IsRemote="no" RemoteHostName="" RemoteHostPort="" DebuggerPath="">
+        <PostConnectCommands/>
+        <StartupCommands/>
+      </Debugger>
+      <PreBuild/>
+      <PostBuild/>
+      <CustomBuild Enabled="no">
+        <RebuildCommand/>
+        <CleanCommand/>
+        <BuildCommand/>
+        <PreprocessFileCommand/>
+        <SingleFileCommand/>
+        <MakefileGenerationCommand/>
+        <ThirdPartyToolName>None</ThirdPartyToolName>
+        <WorkingDirectory/>
+      </CustomBuild>
+      <AdditionalRules>
+        <CustomPostBuild/>
+        <CustomPreBuild/>
+      </AdditionalRules>
+    </Configuration>
+    <Configuration Name="Release" CompilerType="gnu gcc" DebuggerType="GNU gdb debugger" Type="" BuildCmpWithGlobalSettings="append" BuildLnkWithGlobalSettings="append" BuildResWithGlobalSettings="append">
+      <Compiler Options="" Required="yes" PreCompiledHeader="">
+        <IncludePath Value="."/>
+      </Compiler>
+      <Linker Options="-O2" Required="yes"/>
+      <ResourceCompiler Options="" Required="no"/>
+      <General OutputFile="$(IntermediateDirectory)/$(ProjectName)" IntermediateDirectory="./Release" Command="./$(ProjectName)" CommandArguments="" WorkingDirectory="$(IntermediateDirectory)" PauseExecWhenProcTerminates="yes"/>
+      <Debugger IsRemote="no" RemoteHostName="" RemoteHostPort="" DebuggerPath="">
+        <PostConnectCommands/>
+        <StartupCommands/>
+      </Debugger>
+      <PreBuild/>
+      <PostBuild/>
+      <CustomBuild Enabled="no">
+        <RebuildCommand/>
+        <CleanCommand/>
+        <BuildCommand/>
+        <PreprocessFileCommand/>
+        <SingleFileCommand/>
+        <MakefileGenerationCommand/>
+        <ThirdPartyToolName>None</ThirdPartyToolName>
+        <WorkingDirectory/>
+      </CustomBuild>
+      <AdditionalRules>
+        <CustomPostBuild/>
+        <CustomPreBuild/>
+      </AdditionalRules>
+    </Configuration>
+    <GlobalSettings>
+      <Compiler Options="">
+        <IncludePath Value="."/>
+      </Compiler>
+      <Linker Options="">
+        <LibraryPath Value="."/>
+      </Linker>
+      <ResourceCompiler Options=""/>
+    </GlobalSettings>
+  </Settings>
+  <Dependencies Name="Debug">
+    <Project Name="libMesa"/>
+  </Dependencies>
+</CodeLite_Project>
diff --git a/opengl/libagl2/src/api.cpp b/opengl/libagl2/src/api.cpp
new file mode 100644
index 0000000..bb8d62b
--- /dev/null
+++ b/opengl/libagl2/src/api.cpp
@@ -0,0 +1,266 @@
+#include "gles2context.h"
+
+#define API_ENTRY
+#define CALL_GL_API(NAME,...) LOGD("?"#NAME); assert(0);
+#define CALL_GL_API_RETURN(NAME,...) LOGD("?"#NAME); assert(0); return 0;
+
+
+void API_ENTRY(glBindFramebuffer)(GLenum target, GLuint framebuffer)
+{
+   CALL_GL_API(glBindFramebuffer, target, framebuffer);
+}
+void API_ENTRY(glBindRenderbuffer)(GLenum target, GLuint renderbuffer)
+{
+   CALL_GL_API(glBindRenderbuffer, target, renderbuffer);
+}
+GLenum API_ENTRY(glCheckFramebufferStatus)(GLenum target)
+{
+   CALL_GL_API_RETURN(glCheckFramebufferStatus, target);
+}
+void API_ENTRY(glColorMask)(GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha)
+{
+   CALL_GL_API(glColorMask, red, green, blue, alpha);
+}
+void API_ENTRY(glDeleteFramebuffers)(GLsizei n, const GLuint* framebuffers)
+{
+   CALL_GL_API(glDeleteFramebuffers, n, framebuffers);
+}
+void API_ENTRY(glDeleteRenderbuffers)(GLsizei n, const GLuint* renderbuffers)
+{
+   CALL_GL_API(glDeleteRenderbuffers, n, renderbuffers);
+}
+void API_ENTRY(glDepthFunc)(GLenum func)
+{
+   CALL_GL_API(glDepthFunc, func);
+}
+void API_ENTRY(glDepthMask)(GLboolean flag)
+{
+   CALL_GL_API(glDepthMask, flag);
+}
+void API_ENTRY(glDepthRangef)(GLclampf zNear, GLclampf zFar)
+{
+   CALL_GL_API(glDepthRangef, zNear, zFar);
+}
+void API_ENTRY(glFramebufferRenderbuffer)(GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer)
+{
+   CALL_GL_API(glFramebufferRenderbuffer, target, attachment, renderbuffertarget, renderbuffer);
+}
+void API_ENTRY(glFramebufferTexture2D)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level)
+{
+   CALL_GL_API(glFramebufferTexture2D, target, attachment, textarget, texture, level);
+}
+void glGenerateMipmap(GLenum target)
+{
+   //CALL_GL_API(glGenerateMipmap, target);
+   LOGD("agl2: glGenerateMipmap not implemented");
+}
+void API_ENTRY(glGenFramebuffers)(GLsizei n, GLuint* framebuffers)
+{
+   CALL_GL_API(glGenFramebuffers, n, framebuffers);
+}
+void API_ENTRY(glGenRenderbuffers)(GLsizei n, GLuint* renderbuffers)
+{
+   CALL_GL_API(glGenRenderbuffers, n, renderbuffers);
+}
+void API_ENTRY(glGetActiveAttrib)(GLuint program, GLuint index, GLsizei bufsize, GLsizei* length, GLint* size, GLenum* type, GLchar* name)
+{
+   CALL_GL_API(glGetActiveAttrib, program, index, bufsize, length, size, type, name);
+}
+void API_ENTRY(glGetActiveUniform)(GLuint program, GLuint index, GLsizei bufsize, GLsizei* length, GLint* size, GLenum* type, GLchar* name)
+{
+   CALL_GL_API(glGetActiveUniform, program, index, bufsize, length, size, type, name);
+}
+void API_ENTRY(glGetAttachedShaders)(GLuint program, GLsizei maxcount, GLsizei* count, GLuint* shaders)
+{
+   CALL_GL_API(glGetAttachedShaders, program, maxcount, count, shaders);
+}
+void API_ENTRY(glGetBooleanv)(GLenum pname, GLboolean* params)
+{
+   CALL_GL_API(glGetBooleanv, pname, params);
+}
+void API_ENTRY(glGetBufferParameteriv)(GLenum target, GLenum pname, GLint* params)
+{
+   CALL_GL_API(glGetBufferParameteriv, target, pname, params);
+}
+GLenum glGetError(void)
+{
+   puts("agl2: glGetError");
+   return GL_NO_ERROR;
+   //CALL_GL_API_RETURN(glGetError);
+}
+void API_ENTRY(glGetFloatv)(GLenum pname, GLfloat* params)
+{
+   CALL_GL_API(glGetFloatv, pname, params);
+}
+void API_ENTRY(glGetFramebufferAttachmentParameteriv)(GLenum target, GLenum attachment, GLenum pname, GLint* params)
+{
+   CALL_GL_API(glGetFramebufferAttachmentParameteriv, target, attachment, pname, params);
+}
+void API_ENTRY(glGetRenderbufferParameteriv)(GLenum target, GLenum pname, GLint* params)
+{
+   CALL_GL_API(glGetRenderbufferParameteriv, target, pname, params);
+}
+void API_ENTRY(glGetShaderPrecisionFormat)(GLenum shadertype, GLenum precisiontype, GLint* range, GLint* precision)
+{
+   CALL_GL_API(glGetShaderPrecisionFormat, shadertype, precisiontype, range, precision);
+}
+void API_ENTRY(glGetShaderSource)(GLuint shader, GLsizei bufsize, GLsizei* length, GLchar* source)
+{
+   CALL_GL_API(glGetShaderSource, shader, bufsize, length, source);
+}
+void API_ENTRY(glGetUniformfv)(GLuint program, GLint location, GLfloat* params)
+{
+   CALL_GL_API(glGetUniformfv, program, location, params);
+}
+void API_ENTRY(glGetUniformiv)(GLuint program, GLint location, GLint* params)
+{
+   CALL_GL_API(glGetUniformiv, program, location, params);
+}
+void API_ENTRY(glGetVertexAttribfv)(GLuint index, GLenum pname, GLfloat* params)
+{
+   CALL_GL_API(glGetVertexAttribfv, index, pname, params);
+}
+void API_ENTRY(glGetVertexAttribiv)(GLuint index, GLenum pname, GLint* params)
+{
+   CALL_GL_API(glGetVertexAttribiv, index, pname, params);
+}
+void API_ENTRY(glGetVertexAttribPointerv)(GLuint index, GLenum pname, GLvoid** pointer)
+{
+   CALL_GL_API(glGetVertexAttribPointerv, index, pname, pointer);
+}
+GLboolean API_ENTRY(glIsBuffer)(GLuint buffer)
+{
+   CALL_GL_API_RETURN(glIsBuffer, buffer);
+}
+GLboolean API_ENTRY(glIsEnabled)(GLenum cap)
+{
+   CALL_GL_API_RETURN(glIsEnabled, cap);
+}
+GLboolean API_ENTRY(glIsFramebuffer)(GLuint framebuffer)
+{
+   CALL_GL_API_RETURN(glIsFramebuffer, framebuffer);
+}
+GLboolean API_ENTRY(glIsProgram)(GLuint program)
+{
+   CALL_GL_API_RETURN(glIsProgram, program);
+}
+GLboolean API_ENTRY(glIsRenderbuffer)(GLuint renderbuffer)
+{
+   CALL_GL_API_RETURN(glIsRenderbuffer, renderbuffer);
+}
+GLboolean API_ENTRY(glIsShader)(GLuint shader)
+{
+   CALL_GL_API_RETURN(glIsShader, shader);
+}
+void API_ENTRY(glLineWidth)(GLfloat width)
+{
+   CALL_GL_API(glLineWidth, width);
+}
+void API_ENTRY(glPolygonOffset)(GLfloat factor, GLfloat units)
+{
+   CALL_GL_API(glPolygonOffset, factor, units);
+}
+void API_ENTRY(glReadPixels)(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid* pixels)
+{
+   CALL_GL_API(glReadPixels, x, y, width, height, format, type, pixels);
+}
+void API_ENTRY(glReleaseShaderCompiler)(void)
+{
+   CALL_GL_API(glReleaseShaderCompiler);
+}
+void API_ENTRY(glRenderbufferStorage)(GLenum target, GLenum internalformat, GLsizei width, GLsizei height)
+{
+   CALL_GL_API(glRenderbufferStorage, target, internalformat, width, height);
+}
+void API_ENTRY(glSampleCoverage)(GLclampf value, GLboolean invert)
+{
+   CALL_GL_API(glSampleCoverage, value, invert);
+}
+void API_ENTRY(glShaderBinary)(GLsizei n, const GLuint* shaders, GLenum binaryformat, const GLvoid* binary, GLsizei length)
+{
+   CALL_GL_API(glShaderBinary, n, shaders, binaryformat, binary, length);
+}
+void API_ENTRY(glStencilFunc)(GLenum func, GLint ref, GLuint mask)
+{
+   CALL_GL_API(glStencilFunc, func, ref, mask);
+}
+void API_ENTRY(glStencilFuncSeparate)(GLenum face, GLenum func, GLint ref, GLuint mask)
+{
+   CALL_GL_API(glStencilFuncSeparate, face, func, ref, mask);
+}
+void API_ENTRY(glStencilMask)(GLuint mask)
+{
+   CALL_GL_API(glStencilMask, mask);
+}
+void API_ENTRY(glStencilMaskSeparate)(GLenum face, GLuint mask)
+{
+   CALL_GL_API(glStencilMaskSeparate, face, mask);
+}
+void API_ENTRY(glStencilOp)(GLenum fail, GLenum zfail, GLenum zpass)
+{
+   CALL_GL_API(glStencilOp, fail, zfail, zpass);
+}
+void API_ENTRY(glStencilOpSeparate)(GLenum face, GLenum fail, GLenum zfail, GLenum zpass)
+{
+   CALL_GL_API(glStencilOpSeparate, face, fail, zfail, zpass);
+}
+void API_ENTRY(glUniform1fv)(GLint location, GLsizei count, const GLfloat* v)
+{
+   CALL_GL_API(glUniform1fv, location, count, v);
+}
+void API_ENTRY(glUniform1iv)(GLint location, GLsizei count, const GLint* v)
+{
+   CALL_GL_API(glUniform1iv, location, count, v);
+}
+void API_ENTRY(glUniform2fv)(GLint location, GLsizei count, const GLfloat* v)
+{
+   CALL_GL_API(glUniform2fv, location, count, v);
+}
+void API_ENTRY(glUniform2i)(GLint location, GLint x, GLint y)
+{
+   CALL_GL_API(glUniform2i, location, x, y);
+}
+void API_ENTRY(glUniform2iv)(GLint location, GLsizei count, const GLint* v)
+{
+   CALL_GL_API(glUniform2iv, location, count, v);
+}
+void API_ENTRY(glUniform3f)(GLint location, GLfloat x, GLfloat y, GLfloat z)
+{
+   CALL_GL_API(glUniform3f, location, x, y, z);
+}
+void API_ENTRY(glUniform3fv)(GLint location, GLsizei count, const GLfloat* v)
+{
+   CALL_GL_API(glUniform3fv, location, count, v);
+}
+void API_ENTRY(glUniform3i)(GLint location, GLint x, GLint y, GLint z)
+{
+   CALL_GL_API(glUniform3i, location, x, y, z);
+}
+void API_ENTRY(glUniform3iv)(GLint location, GLsizei count, const GLint* v)
+{
+   CALL_GL_API(glUniform3iv, location, count, v);
+}
+void API_ENTRY(glUniform4fv)(GLint location, GLsizei count, const GLfloat* v)
+{
+   CALL_GL_API(glUniform4fv, location, count, v);
+}
+void API_ENTRY(glUniform4i)(GLint location, GLint x, GLint y, GLint z, GLint w)
+{
+   CALL_GL_API(glUniform4i, location, x, y, z, w);
+}
+void API_ENTRY(glUniform4iv)(GLint location, GLsizei count, const GLint* v)
+{
+   CALL_GL_API(glUniform4iv, location, count, v);
+}
+void API_ENTRY(glUniformMatrix2fv)(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value)
+{
+   CALL_GL_API(glUniformMatrix2fv, location, count, transpose, value);
+}
+void API_ENTRY(glUniformMatrix3fv)(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value)
+{
+   CALL_GL_API(glUniformMatrix3fv, location, count, transpose, value);
+}
+void API_ENTRY(glValidateProgram)(GLuint program)
+{
+   CALL_GL_API(glValidateProgram, program);
+}
diff --git a/opengl/libagl2/src/egl.cpp b/opengl/libagl2/src/egl.cpp
new file mode 100644
index 0000000..6184644
--- /dev/null
+++ b/opengl/libagl2/src/egl.cpp
@@ -0,0 +1,2232 @@
+/*
+**
+** Copyright 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.
+*/
+
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/mman.h>
+
+#include <cutils/atomic.h>
+
+
+#include <private/ui/android_natives_priv.h>
+
+#include <hardware/copybit.h>
+
+#include "gles2context.h"
+
+// ----------------------------------------------------------------------------
+namespace android
+{
+// ----------------------------------------------------------------------------
+
+const unsigned int NUM_DISPLAYS = 1;
+
+static pthread_mutex_t gInitMutex = PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t gErrorKeyMutex = PTHREAD_MUTEX_INITIALIZER;
+static pthread_key_t gEGLErrorKey = -1;
+#ifndef HAVE_ANDROID_OS
+namespace gl {
+pthread_key_t gGLKey = -1;
+}; // namespace gl
+#endif
+
+template<typename T>
+static T setError(GLint error, T returnValue)
+{
+   if (ggl_unlikely(gEGLErrorKey == -1)) {
+      pthread_mutex_lock(&gErrorKeyMutex);
+      if (gEGLErrorKey == -1)
+         pthread_key_create(&gEGLErrorKey, NULL);
+      pthread_mutex_unlock(&gErrorKeyMutex);
+   }
+   pthread_setspecific(gEGLErrorKey, (void*)error);
+   return returnValue;
+}
+
+static GLint getError()
+{
+   if (ggl_unlikely(gEGLErrorKey == -1))
+      return EGL_SUCCESS;
+   GLint error = (GLint)pthread_getspecific(gEGLErrorKey);
+   if (error == 0) {
+      // The TLS key has been created by another thread, but the value for
+      // this thread has not been initialized.
+      return EGL_SUCCESS;
+   }
+   pthread_setspecific(gEGLErrorKey, (void*)EGL_SUCCESS);
+   return error;
+}
+
+// ----------------------------------------------------------------------------
+
+struct egl_display_t {
+   egl_display_t() : type(0), initialized(0) { }
+
+   static egl_display_t& get_display(EGLDisplay dpy);
+
+   static EGLBoolean is_valid(EGLDisplay dpy) {
+      return ((uintptr_t(dpy)-1U) >= NUM_DISPLAYS) ? EGL_FALSE : EGL_TRUE;
+   }
+
+   NativeDisplayType   type;
+   volatile int32_t    initialized;
+};
+
+static egl_display_t gDisplays[NUM_DISPLAYS];
+
+egl_display_t& egl_display_t::get_display(EGLDisplay dpy)
+{
+   return gDisplays[uintptr_t(dpy)-1U];
+}
+
+// ----------------------------------------------------------------------------
+
+struct egl_surface_t {
+   enum {
+      PAGE_FLIP = 0x00000001,
+      MAGIC     = 0x31415265
+   };
+
+   uint32_t            magic;
+   EGLDisplay          dpy;
+   EGLConfig           config;
+   EGLContext          ctx;
+
+   egl_surface_t(EGLDisplay dpy, EGLConfig config, int32_t depthFormat);
+   virtual     ~egl_surface_t();
+   bool    isValid() const;
+   virtual     bool    initCheck() const = 0;
+
+   virtual     EGLBoolean  bindDrawSurface(GLES2Context* gl) = 0;
+   virtual     EGLBoolean  bindReadSurface(GLES2Context* gl) = 0;
+   virtual     EGLBoolean  connect() {
+      return EGL_TRUE;
+   }
+   virtual     void        disconnect() {}
+   virtual     EGLint      getWidth() const = 0;
+   virtual     EGLint      getHeight() const = 0;
+
+   virtual     EGLint      getHorizontalResolution() const;
+   virtual     EGLint      getVerticalResolution() const;
+   virtual     EGLint      getRefreshRate() const;
+   virtual     EGLint      getSwapBehavior() const;
+   virtual     EGLBoolean  swapBuffers();
+   virtual     EGLBoolean  setSwapRectangle(EGLint l, EGLint t, EGLint w, EGLint h);
+protected:
+   GGLSurface              depth;
+};
+
+egl_surface_t::egl_surface_t(EGLDisplay dpy,
+                             EGLConfig config,
+                             int32_t depthFormat)
+      : magic(MAGIC), dpy(dpy), config(config), ctx(0)
+{
+   depth.version = sizeof(GGLSurface);
+   depth.data = 0;
+   depth.format = (GGLPixelFormat)depthFormat;
+}
+egl_surface_t::~egl_surface_t()
+{
+   magic = 0;
+   free(depth.data);
+}
+bool egl_surface_t::isValid() const
+{
+   LOGE_IF(magic != MAGIC, "invalid EGLSurface (%p)", this);
+   return magic == MAGIC;
+}
+
+EGLBoolean egl_surface_t::swapBuffers()
+{
+   return EGL_FALSE;
+}
+EGLint egl_surface_t::getHorizontalResolution() const
+{
+   return (0 * EGL_DISPLAY_SCALING) * (1.0f / 25.4f);
+}
+EGLint egl_surface_t::getVerticalResolution() const
+{
+   return (0 * EGL_DISPLAY_SCALING) * (1.0f / 25.4f);
+}
+EGLint egl_surface_t::getRefreshRate() const
+{
+   return (60 * EGL_DISPLAY_SCALING);
+}
+EGLint egl_surface_t::getSwapBehavior() const
+{
+   return EGL_BUFFER_PRESERVED;
+}
+EGLBoolean egl_surface_t::setSwapRectangle(
+   EGLint l, EGLint t, EGLint w, EGLint h)
+{
+   return EGL_FALSE;
+}
+
+// ----------------------------------------------------------------------------
+
+struct egl_window_surface_v2_t : public egl_surface_t {
+   egl_window_surface_v2_t(
+      EGLDisplay dpy, EGLConfig config,
+      int32_t depthFormat,
+      ANativeWindow* window);
+
+   ~egl_window_surface_v2_t();
+
+   virtual     bool        initCheck() const {
+      return true;   // TODO: report failure if ctor fails
+   }
+   virtual     EGLBoolean  swapBuffers();
+   virtual     EGLBoolean  bindDrawSurface(GLES2Context* gl);
+   virtual     EGLBoolean  bindReadSurface(GLES2Context* gl);
+   virtual     EGLBoolean  connect();
+   virtual     void        disconnect();
+   virtual     EGLint      getWidth() const    {
+      return width;
+   }
+   virtual     EGLint      getHeight() const   {
+      return height;
+   }
+   virtual     EGLint      getHorizontalResolution() const;
+   virtual     EGLint      getVerticalResolution() const;
+   virtual     EGLint      getRefreshRate() const;
+   virtual     EGLint      getSwapBehavior() const;
+   virtual     EGLBoolean  setSwapRectangle(EGLint l, EGLint t, EGLint w, EGLint h);
+
+private:
+   status_t lock(android_native_buffer_t* buf, int usage, void** vaddr);
+   status_t unlock(android_native_buffer_t* buf);
+   ANativeWindow*   nativeWindow;
+   android_native_buffer_t*   buffer;
+   android_native_buffer_t*   previousBuffer;
+   gralloc_module_t const*    module;
+   copybit_device_t*          blitengine;
+   int width;
+   int height;
+   void* bits;
+   GGLFormat const* pixelFormatTable;
+
+   struct Rect {
+      inline Rect() { };
+      inline Rect(int32_t w, int32_t h)
+            : left(0), top(0), right(w), bottom(h) { }
+      inline Rect(int32_t l, int32_t t, int32_t r, int32_t b)
+            : left(l), top(t), right(r), bottom(b) { }
+      Rect& andSelf(const Rect& r) {
+         left   = max(left, r.left);
+         top    = max(top, r.top);
+         right  = min(right, r.right);
+         bottom = min(bottom, r.bottom);
+         return *this;
+      }
+      bool isEmpty() const {
+         return (left>=right || top>=bottom);
+      }
+      void dump(char const* what) {
+         LOGD("%s { %5d, %5d, w=%5d, h=%5d }",
+              what, left, top, right-left, bottom-top);
+      }
+
+      int32_t left;
+      int32_t top;
+      int32_t right;
+      int32_t bottom;
+   };
+
+   struct Region {
+      inline Region() : count(0) { }
+      typedef Rect const* const_iterator;
+      const_iterator begin() const {
+         return storage;
+      }
+      const_iterator end() const {
+         return storage+count;
+      }
+      static Region subtract(const Rect& lhs, const Rect& rhs) {
+         Region reg;
+         Rect* storage = reg.storage;
+         if (!lhs.isEmpty()) {
+            if (lhs.top < rhs.top) { // top rect
+               storage->left   = lhs.left;
+               storage->top    = lhs.top;
+               storage->right  = lhs.right;
+               storage->bottom = rhs.top;
+               storage++;
+            }
+            const int32_t top = max(lhs.top, rhs.top);
+            const int32_t bot = min(lhs.bottom, rhs.bottom);
+            if (top < bot) {
+               if (lhs.left < rhs.left) { // left-side rect
+                  storage->left   = lhs.left;
+                  storage->top    = top;
+                  storage->right  = rhs.left;
+                  storage->bottom = bot;
+                  storage++;
+               }
+               if (lhs.right > rhs.right) { // right-side rect
+                  storage->left   = rhs.right;
+                  storage->top    = top;
+                  storage->right  = lhs.right;
+                  storage->bottom = bot;
+                  storage++;
+               }
+            }
+            if (lhs.bottom > rhs.bottom) { // bottom rect
+               storage->left   = lhs.left;
+               storage->top    = rhs.bottom;
+               storage->right  = lhs.right;
+               storage->bottom = lhs.bottom;
+               storage++;
+            }
+            reg.count = storage - reg.storage;
+         }
+         return reg;
+      }
+      bool isEmpty() const {
+         return count<=0;
+      }
+private:
+      Rect storage[4];
+      ssize_t count;
+   };
+
+   struct region_iterator : public copybit_region_t {
+      region_iterator(const Region& region)
+            : b(region.begin()), e(region.end()) {
+         this->next = iterate;
+      }
+private:
+      static int iterate(copybit_region_t const * self, copybit_rect_t* rect) {
+         region_iterator const* me = static_cast<region_iterator const*>(self);
+         if (me->b != me->e) {
+            *reinterpret_cast<Rect*>(rect) = *me->b++;
+            return 1;
+         }
+         return 0;
+      }
+      mutable Region::const_iterator b;
+      Region::const_iterator const e;
+   };
+
+   void copyBlt(
+      android_native_buffer_t* dst, void* dst_vaddr,
+      android_native_buffer_t* src, void const* src_vaddr,
+      const Region& clip);
+
+   Rect dirtyRegion;
+   Rect oldDirtyRegion;
+};
+
+egl_window_surface_v2_t::egl_window_surface_v2_t(EGLDisplay dpy,
+      EGLConfig config,
+      int32_t depthFormat,
+      ANativeWindow* window)
+      : egl_surface_t(dpy, config, depthFormat),
+      nativeWindow(window), buffer(0), previousBuffer(0), module(0),
+      blitengine(0), bits(NULL)
+{
+   hw_module_t const* pModule;
+   hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &pModule);
+   module = reinterpret_cast<gralloc_module_t const*>(pModule);
+
+   if (hw_get_module(COPYBIT_HARDWARE_MODULE_ID, &pModule) == 0) {
+      copybit_open(pModule, &blitengine);
+   }
+
+   pixelFormatTable = gglGetPixelFormatTable();
+
+   // keep a reference on the window
+   nativeWindow->common.incRef(&nativeWindow->common);
+   nativeWindow->query(nativeWindow, NATIVE_WINDOW_WIDTH, &width);
+   nativeWindow->query(nativeWindow, NATIVE_WINDOW_HEIGHT, &height);
+   int format = 0;
+   nativeWindow->query(nativeWindow, NATIVE_WINDOW_FORMAT, &format);
+   LOGD("agl2: egl_window_surface_v2_t format=0x%.4X", format);
+//   assert(0);
+}
+
+egl_window_surface_v2_t::~egl_window_surface_v2_t()
+{
+   if (buffer) {
+      buffer->common.decRef(&buffer->common);
+   }
+   if (previousBuffer) {
+      previousBuffer->common.decRef(&previousBuffer->common);
+   }
+   nativeWindow->common.decRef(&nativeWindow->common);
+   if (blitengine) {
+      copybit_close(blitengine);
+   }
+}
+
+EGLBoolean egl_window_surface_v2_t::connect()
+{
+   // we're intending to do software rendering
+   native_window_set_usage(nativeWindow,
+                           GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN);
+
+   // dequeue a buffer
+   if (nativeWindow->dequeueBuffer(nativeWindow, &buffer) != NO_ERROR) {
+      return setError(EGL_BAD_ALLOC, EGL_FALSE);
+   }
+
+   // allocate a corresponding depth-buffer
+   width = buffer->width;
+   height = buffer->height;
+   if (depth.format) {
+      depth.width   = width;
+      depth.height  = height;
+      depth.stride  = depth.width; // use the width here
+      assert(GGL_PIXEL_FORMAT_Z_32 == depth.format);
+      depth.data    = (GGLubyte*)malloc(depth.stride*depth.height*4);
+      if (depth.data == 0) {
+         return setError(EGL_BAD_ALLOC, EGL_FALSE);
+      }
+   }
+
+   // keep a reference on the buffer
+   buffer->common.incRef(&buffer->common);
+
+   // Lock the buffer
+   nativeWindow->lockBuffer(nativeWindow, buffer);
+   // pin the buffer down
+   if (lock(buffer, GRALLOC_USAGE_SW_READ_OFTEN |
+            GRALLOC_USAGE_SW_WRITE_OFTEN, &bits) != NO_ERROR) {
+      LOGE("connect() failed to lock buffer %p (%ux%u)",
+           buffer, buffer->width, buffer->height);
+      return setError(EGL_BAD_ACCESS, EGL_FALSE);
+      // FIXME: we should make sure we're not accessing the buffer anymore
+   }
+   return EGL_TRUE;
+}
+
+void egl_window_surface_v2_t::disconnect()
+{
+   if (buffer && bits) {
+      bits = NULL;
+      unlock(buffer);
+   }
+   // enqueue the last frame
+   if (buffer)
+      nativeWindow->queueBuffer(nativeWindow, buffer);
+   if (buffer) {
+      buffer->common.decRef(&buffer->common);
+      buffer = 0;
+   }
+   if (previousBuffer) {
+      previousBuffer->common.decRef(&previousBuffer->common);
+      previousBuffer = 0;
+   }
+}
+
+status_t egl_window_surface_v2_t::lock(
+   android_native_buffer_t* buf, int usage, void** vaddr)
+{
+   int err;
+
+   err = module->lock(module, buf->handle,
+                      usage, 0, 0, buf->width, buf->height, vaddr);
+
+   return err;
+}
+
+status_t egl_window_surface_v2_t::unlock(android_native_buffer_t* buf)
+{
+   if (!buf) return BAD_VALUE;
+   int err = NO_ERROR;
+
+   err = module->unlock(module, buf->handle);
+
+   return err;
+}
+
+void egl_window_surface_v2_t::copyBlt(
+   android_native_buffer_t* dst, void* dst_vaddr,
+   android_native_buffer_t* src, void const* src_vaddr,
+   const Region& clip)
+{
+   // FIXME: use copybit if possible
+   // NOTE: dst and src must be the same format
+
+   status_t err = NO_ERROR;
+   copybit_device_t* const copybit = blitengine;
+   if (copybit)  {
+      copybit_image_t simg;
+      simg.w = src->stride;
+      simg.h = src->height;
+      simg.format = src->format;
+      simg.handle = const_cast<native_handle_t*>(src->handle);
+
+      copybit_image_t dimg;
+      dimg.w = dst->stride;
+      dimg.h = dst->height;
+      dimg.format = dst->format;
+      dimg.handle = const_cast<native_handle_t*>(dst->handle);
+
+      copybit->set_parameter(copybit, COPYBIT_TRANSFORM, 0);
+      copybit->set_parameter(copybit, COPYBIT_PLANE_ALPHA, 255);
+      copybit->set_parameter(copybit, COPYBIT_DITHER, COPYBIT_DISABLE);
+      region_iterator it(clip);
+      err = copybit->blit(copybit, &dimg, &simg, &it);
+      if (err != NO_ERROR) {
+         LOGE("copybit failed (%s)", strerror(err));
+      }
+   }
+
+   if (!copybit || err) {
+      Region::const_iterator cur = clip.begin();
+      Region::const_iterator end = clip.end();
+
+      const size_t bpp = pixelFormatTable[src->format].size;
+      const size_t dbpr = dst->stride * bpp;
+      const size_t sbpr = src->stride * bpp;
+
+      uint8_t const * const src_bits = (uint8_t const *)src_vaddr;
+      uint8_t       * const dst_bits = (uint8_t       *)dst_vaddr;
+
+      while (cur != end) {
+         const Rect& r(*cur++);
+         ssize_t w = r.right - r.left;
+         ssize_t h = r.bottom - r.top;
+         if (w <= 0 || h<=0) continue;
+         size_t size = w * bpp;
+         uint8_t const * s = src_bits + (r.left + src->stride * r.top) * bpp;
+         uint8_t       * d = dst_bits + (r.left + dst->stride * r.top) * bpp;
+         if (dbpr==sbpr && size==sbpr) {
+            size *= h;
+            h = 1;
+         }
+         do {
+            memcpy(d, s, size);
+            d += dbpr;
+            s += sbpr;
+         } while (--h > 0);
+      }
+   }
+}
+
+EGLBoolean egl_window_surface_v2_t::swapBuffers()
+{
+   if (!buffer) {
+      return setError(EGL_BAD_ACCESS, EGL_FALSE);
+   }
+
+   /*
+    * Handle eglSetSwapRectangleANDROID()
+    * We copyback from the front buffer
+    */
+   if (!dirtyRegion.isEmpty()) {
+      dirtyRegion.andSelf(Rect(buffer->width, buffer->height));
+      if (previousBuffer) {
+         // This was const Region copyBack, but that causes an
+         // internal compile error on simulator builds
+         /*const*/
+         Region copyBack(Region::subtract(oldDirtyRegion, dirtyRegion));
+         if (!copyBack.isEmpty()) {
+            void* prevBits;
+            if (lock(previousBuffer,
+                     GRALLOC_USAGE_SW_READ_OFTEN, &prevBits) == NO_ERROR) {
+               // copy from previousBuffer to buffer
+               copyBlt(buffer, bits, previousBuffer, prevBits, copyBack);
+               unlock(previousBuffer);
+            }
+         }
+      }
+      oldDirtyRegion = dirtyRegion;
+   }
+
+   if (previousBuffer) {
+      previousBuffer->common.decRef(&previousBuffer->common);
+      previousBuffer = 0;
+   }
+
+   unlock(buffer);
+   previousBuffer = buffer;
+   nativeWindow->queueBuffer(nativeWindow, buffer);
+   buffer = 0;
+
+   // dequeue a new buffer
+   if (nativeWindow->dequeueBuffer(nativeWindow, &buffer) == NO_ERROR) {
+
+      // TODO: lockBuffer should rather be executed when the very first
+      // direct rendering occurs.
+      nativeWindow->lockBuffer(nativeWindow, buffer);
+
+      // reallocate the depth-buffer if needed
+      if ((width != buffer->width) || (height != buffer->height)) {
+         // TODO: we probably should reset the swap rect here
+         // if the window size has changed
+         width = buffer->width;
+         height = buffer->height;
+         if (depth.data) {
+            free(depth.data);
+            depth.width   = width;
+            depth.height  = height;
+            depth.stride  = buffer->stride;
+            depth.data    = (GGLubyte*)malloc(depth.stride*depth.height*2);
+            if (depth.data == 0) {
+               setError(EGL_BAD_ALLOC, EGL_FALSE);
+               return EGL_FALSE;
+            }
+         }
+      }
+
+      // keep a reference on the buffer
+      buffer->common.incRef(&buffer->common);
+
+      // finally pin the buffer down
+      if (lock(buffer, GRALLOC_USAGE_SW_READ_OFTEN |
+               GRALLOC_USAGE_SW_WRITE_OFTEN, &bits) != NO_ERROR) {
+         LOGE("eglSwapBuffers() failed to lock buffer %p (%ux%u)",
+              buffer, buffer->width, buffer->height);
+         return setError(EGL_BAD_ACCESS, EGL_FALSE);
+         // FIXME: we should make sure we're not accessing the buffer anymore
+      }
+   } else {
+      return setError(EGL_BAD_CURRENT_SURFACE, EGL_FALSE);
+   }
+
+   return EGL_TRUE;
+}
+
+EGLBoolean egl_window_surface_v2_t::setSwapRectangle(
+   EGLint l, EGLint t, EGLint w, EGLint h)
+{
+   dirtyRegion = Rect(l, t, l+w, t+h);
+   return EGL_TRUE;
+}
+
+EGLBoolean egl_window_surface_v2_t::bindDrawSurface(GLES2Context* gl)
+{
+   GGLSurface buffer;
+   buffer.version = sizeof(GGLSurface);
+   buffer.width   = this->buffer->width;
+   buffer.height  = this->buffer->height;
+   buffer.stride  = this->buffer->stride;
+   buffer.data    = (GGLubyte*)bits;
+   buffer.format  = (GGLPixelFormat)this->buffer->format;
+   gl->rasterizer.interface.SetBuffer(&gl->rasterizer.interface, GL_COLOR_BUFFER_BIT, &buffer);
+   if (depth.data != gl->rasterizer.depthSurface.data)
+      gl->rasterizer.interface.SetBuffer(&gl->rasterizer.interface, GL_DEPTH_BUFFER_BIT, &depth);
+
+   return EGL_TRUE;
+}
+EGLBoolean egl_window_surface_v2_t::bindReadSurface(GLES2Context* gl)
+{
+   GGLSurface buffer;
+   buffer.version = sizeof(GGLSurface);
+   buffer.width   = this->buffer->width;
+   buffer.height  = this->buffer->height;
+   buffer.stride  = this->buffer->stride;
+   buffer.data    = (GGLubyte*)bits; // FIXME: hopefully is is LOCKED!!!
+   buffer.format  = (GGLPixelFormat)this->buffer->format;
+   puts("agl2: readBuffer not implemented");
+   //gl->rasterizer.interface.readBuffer(gl, &buffer);
+   return EGL_TRUE;
+}
+EGLint egl_window_surface_v2_t::getHorizontalResolution() const
+{
+   return (nativeWindow->xdpi * EGL_DISPLAY_SCALING) * (1.0f / 25.4f);
+}
+EGLint egl_window_surface_v2_t::getVerticalResolution() const
+{
+   return (nativeWindow->ydpi * EGL_DISPLAY_SCALING) * (1.0f / 25.4f);
+}
+EGLint egl_window_surface_v2_t::getRefreshRate() const
+{
+   return (60 * EGL_DISPLAY_SCALING); // FIXME
+}
+EGLint egl_window_surface_v2_t::getSwapBehavior() const
+{
+   /*
+    * EGL_BUFFER_PRESERVED means that eglSwapBuffers() completely preserves
+    * the content of the swapped buffer.
+    *
+    * EGL_BUFFER_DESTROYED means that the content of the buffer is lost.
+    *
+    * However when ANDROID_swap_retcangle is supported, EGL_BUFFER_DESTROYED
+    * only applies to the area specified by eglSetSwapRectangleANDROID(), that
+    * is, everything outside of this area is preserved.
+    *
+    * This implementation of EGL assumes the later case.
+    *
+    */
+
+   return EGL_BUFFER_DESTROYED;
+}
+
+// ----------------------------------------------------------------------------
+
+struct egl_pixmap_surface_t : public egl_surface_t {
+   egl_pixmap_surface_t(
+      EGLDisplay dpy, EGLConfig config,
+      int32_t depthFormat,
+      egl_native_pixmap_t const * pixmap);
+
+   virtual ~egl_pixmap_surface_t() { }
+
+   virtual     bool        initCheck() const {
+      return !depth.format || depth.data!=0;
+   }
+   virtual     EGLBoolean  bindDrawSurface(GLES2Context* gl);
+   virtual     EGLBoolean  bindReadSurface(GLES2Context* gl);
+   virtual     EGLint      getWidth() const    {
+      return nativePixmap.width;
+   }
+   virtual     EGLint      getHeight() const   {
+      return nativePixmap.height;
+   }
+private:
+   egl_native_pixmap_t     nativePixmap;
+};
+
+egl_pixmap_surface_t::egl_pixmap_surface_t(EGLDisplay dpy,
+      EGLConfig config,
+      int32_t depthFormat,
+      egl_native_pixmap_t const * pixmap)
+      : egl_surface_t(dpy, config, depthFormat), nativePixmap(*pixmap)
+{
+   if (depthFormat) {
+      depth.width   = pixmap->width;
+      depth.height  = pixmap->height;
+      depth.stride  = depth.width; // use the width here
+      depth.data    = (GGLubyte*)malloc(depth.stride*depth.height*2);
+      if (depth.data == 0) {
+         setError(EGL_BAD_ALLOC, EGL_NO_SURFACE);
+      }
+   }
+}
+EGLBoolean egl_pixmap_surface_t::bindDrawSurface(GLES2Context* gl)
+{
+   GGLSurface buffer;
+   buffer.version = sizeof(GGLSurface);
+   buffer.width   = nativePixmap.width;
+   buffer.height  = nativePixmap.height;
+   buffer.stride  = nativePixmap.stride;
+   buffer.data    = nativePixmap.data;
+   buffer.format  = (GGLPixelFormat)nativePixmap.format;
+
+   gl->rasterizer.interface.SetBuffer(&gl->rasterizer.interface, GL_COLOR_BUFFER_BIT, &buffer);
+   if (depth.data != gl->rasterizer.depthSurface.data)
+      gl->rasterizer.interface.SetBuffer(&gl->rasterizer.interface, GL_DEPTH_BUFFER_BIT, &depth);
+   return EGL_TRUE;
+}
+EGLBoolean egl_pixmap_surface_t::bindReadSurface(GLES2Context* gl)
+{
+   GGLSurface buffer;
+   buffer.version = sizeof(GGLSurface);
+   buffer.width   = nativePixmap.width;
+   buffer.height  = nativePixmap.height;
+   buffer.stride  = nativePixmap.stride;
+   buffer.data    = nativePixmap.data;
+   buffer.format  = (GGLPixelFormat)nativePixmap.format;
+   puts("agl2: readBuffer not implemented");
+   //gl->rasterizer.interface.readBuffer(gl, &buffer);
+   return EGL_TRUE;
+}
+
+// ----------------------------------------------------------------------------
+
+struct egl_pbuffer_surface_t : public egl_surface_t {
+   egl_pbuffer_surface_t(
+      EGLDisplay dpy, EGLConfig config, int32_t depthFormat,
+      int32_t w, int32_t h, int32_t f);
+
+   virtual ~egl_pbuffer_surface_t();
+
+   virtual     bool        initCheck() const   {
+      return pbuffer.data != 0;
+   }
+   virtual     EGLBoolean  bindDrawSurface(GLES2Context* gl);
+   virtual     EGLBoolean  bindReadSurface(GLES2Context* gl);
+   virtual     EGLint      getWidth() const    {
+      return pbuffer.width;
+   }
+   virtual     EGLint      getHeight() const   {
+      return pbuffer.height;
+   }
+private:
+   GGLSurface  pbuffer;
+};
+
+egl_pbuffer_surface_t::egl_pbuffer_surface_t(EGLDisplay dpy,
+      EGLConfig config, int32_t depthFormat,
+      int32_t w, int32_t h, int32_t f)
+      : egl_surface_t(dpy, config, depthFormat)
+{
+   size_t size = w*h;
+   switch (f) {
+   case GGL_PIXEL_FORMAT_A_8:
+      size *= 1;
+      break;
+   case GGL_PIXEL_FORMAT_RGB_565:
+      size *= 2;
+      break;
+   case GGL_PIXEL_FORMAT_RGBA_8888:
+      size *= 4;
+      break;
+   case GGL_PIXEL_FORMAT_RGBX_8888:
+      size *= 4;
+      break;
+   default:
+      LOGE("incompatible pixel format for pbuffer (format=%d)", f);
+      pbuffer.data = 0;
+      break;
+   }
+   pbuffer.version = sizeof(GGLSurface);
+   pbuffer.width   = w;
+   pbuffer.height  = h;
+   pbuffer.stride  = w;
+   pbuffer.data    = (GGLubyte*)malloc(size);
+   pbuffer.format  = (GGLPixelFormat)f;
+
+   if (depthFormat) {
+      depth.width   = pbuffer.width;
+      depth.height  = pbuffer.height;
+      depth.stride  = depth.width; // use the width here
+      depth.data    = (GGLubyte*)malloc(depth.stride*depth.height*2);
+      if (depth.data == 0) {
+         setError(EGL_BAD_ALLOC, EGL_NO_SURFACE);
+         return;
+      }
+   }
+}
+egl_pbuffer_surface_t::~egl_pbuffer_surface_t()
+{
+   free(pbuffer.data);
+}
+EGLBoolean egl_pbuffer_surface_t::bindDrawSurface(GLES2Context* gl)
+{
+   gl->rasterizer.interface.SetBuffer(&gl->rasterizer.interface, GL_COLOR_BUFFER_BIT, &pbuffer);
+   if (depth.data != gl->rasterizer.depthSurface.data)
+      gl->rasterizer.interface.SetBuffer(&gl->rasterizer.interface, GL_DEPTH_BUFFER_BIT, &depth);
+   return EGL_TRUE;
+}
+EGLBoolean egl_pbuffer_surface_t::bindReadSurface(GLES2Context* gl)
+{
+   puts("agl2: readBuffer not implemented");
+   //gl->rasterizer.interface.readBuffer(gl, &pbuffer);
+   return EGL_TRUE;
+}
+
+// ----------------------------------------------------------------------------
+
+struct config_pair_t {
+   GLint key;
+   GLint value;
+};
+
+struct configs_t {
+   const config_pair_t* array;
+   int                  size;
+};
+
+struct config_management_t {
+   GLint key;
+   bool (*match)(GLint reqValue, GLint confValue);
+   static bool atLeast(GLint reqValue, GLint confValue) {
+      return (reqValue == EGL_DONT_CARE) || (confValue >= reqValue);
+   }
+   static bool exact(GLint reqValue, GLint confValue) {
+      return (reqValue == EGL_DONT_CARE) || (confValue == reqValue);
+   }
+   static bool mask(GLint reqValue, GLint confValue) {
+      return (confValue & reqValue) == reqValue;
+   }
+   static bool ignore(GLint reqValue, GLint confValue) {
+      return true;
+   }
+};
+
+// ----------------------------------------------------------------------------
+
+#define VERSION_MAJOR 1
+#define VERSION_MINOR 2
+static char const * const gVendorString     = "Google Inc.";
+static char const * const gVersionString    = "0.0 Android Driver 0.0.0";
+static char const * const gClientApiString  = "OpenGL ES2";
+static char const * const gExtensionsString =
+   //"EGL_KHR_image_base "
+   // "KHR_image_pixmap "
+   //"EGL_ANDROID_image_native_buffer "
+   //"EGL_ANDROID_swap_rectangle "
+   "";
+
+// ----------------------------------------------------------------------------
+
+struct extention_map_t {
+   const char * const name;
+   __eglMustCastToProperFunctionPointerType address;
+};
+
+static const extention_map_t gExtentionMap[] = {
+//    { "glDrawTexsOES",
+//            (__eglMustCastToProperFunctionPointerType)&glDrawTexsOES },
+//    { "glDrawTexiOES",
+//            (__eglMustCastToProperFunctionPointerType)&glDrawTexiOES },
+//    { "glDrawTexfOES",
+//            (__eglMustCastToProperFunctionPointerType)&glDrawTexfOES },
+//    { "glDrawTexxOES",
+//            (__eglMustCastToProperFunctionPointerType)&glDrawTexxOES },
+//    { "glDrawTexsvOES",
+//            (__eglMustCastToProperFunctionPointerType)&glDrawTexsvOES },
+//    { "glDrawTexivOES",
+//            (__eglMustCastToProperFunctionPointerType)&glDrawTexivOES },
+//    { "glDrawTexfvOES",
+//            (__eglMustCastToProperFunctionPointerType)&glDrawTexfvOES },
+//    { "glDrawTexxvOES",
+//            (__eglMustCastToProperFunctionPointerType)&glDrawTexxvOES },
+//    { "glQueryMatrixxOES",
+//            (__eglMustCastToProperFunctionPointerType)&glQueryMatrixxOES },
+//    { "glEGLImageTargetTexture2DOES",
+//            (__eglMustCastToProperFunctionPointerType)&glEGLImageTargetTexture2DOES },
+//    { "glEGLImageTargetRenderbufferStorageOES",
+//            (__eglMustCastToProperFunctionPointerType)&glEGLImageTargetRenderbufferStorageOES },
+//    { "glClipPlanef",
+//            (__eglMustCastToProperFunctionPointerType)&glClipPlanef },
+//    { "glClipPlanex",
+//            (__eglMustCastToProperFunctionPointerType)&glClipPlanex },
+//    { "glBindBuffer",
+//            (__eglMustCastToProperFunctionPointerType)&glBindBuffer },
+//    { "glBufferData",
+//            (__eglMustCastToProperFunctionPointerType)&glBufferData },
+//    { "glBufferSubData",
+//            (__eglMustCastToProperFunctionPointerType)&glBufferSubData },
+//    { "glDeleteBuffers",
+//            (__eglMustCastToProperFunctionPointerType)&glDeleteBuffers },
+//    { "glGenBuffers",
+//            (__eglMustCastToProperFunctionPointerType)&glGenBuffers },
+//    { "eglCreateImageKHR",
+//            (__eglMustCastToProperFunctionPointerType)&eglCreateImageKHR },
+//    { "eglDestroyImageKHR",
+//            (__eglMustCastToProperFunctionPointerType)&eglDestroyImageKHR },
+//    { "eglSetSwapRectangleANDROID",
+//            (__eglMustCastToProperFunctionPointerType)&eglSetSwapRectangleANDROID },
+};
+
+/*
+ * In the lists below, attributes names MUST be sorted.
+ * Additionally, all configs must be sorted according to
+ * the EGL specification.
+ */
+
+static config_pair_t const config_base_attribute_list[] = {
+   { EGL_STENCIL_SIZE,               0                                 },
+   { EGL_CONFIG_CAVEAT,              EGL_SLOW_CONFIG                   },
+   { EGL_LEVEL,                      0                                 },
+   { EGL_MAX_PBUFFER_HEIGHT,         GGL_MAX_VIEWPORT_DIMS             },
+   { EGL_MAX_PBUFFER_PIXELS,
+     GGL_MAX_VIEWPORT_DIMS*GGL_MAX_VIEWPORT_DIMS                 },
+   { EGL_MAX_PBUFFER_WIDTH,          GGL_MAX_VIEWPORT_DIMS             },
+   { EGL_NATIVE_RENDERABLE,          EGL_TRUE                          },
+   { EGL_NATIVE_VISUAL_ID,           0                                 },
+   { EGL_NATIVE_VISUAL_TYPE,         GGL_PIXEL_FORMAT_RGBA_8888        },
+   { EGL_SAMPLES,                    0                                 },
+   { EGL_SAMPLE_BUFFERS,             0                                 },
+   { EGL_TRANSPARENT_TYPE,           EGL_NONE                          },
+   { EGL_TRANSPARENT_BLUE_VALUE,     0                                 },
+   { EGL_TRANSPARENT_GREEN_VALUE,    0                                 },
+   { EGL_TRANSPARENT_RED_VALUE,      0                                 },
+   { EGL_BIND_TO_TEXTURE_RGBA,       EGL_FALSE                         },
+   { EGL_BIND_TO_TEXTURE_RGB,        EGL_FALSE                         },
+   { EGL_MIN_SWAP_INTERVAL,          1                                 },
+   { EGL_MAX_SWAP_INTERVAL,          1                                 },
+   { EGL_LUMINANCE_SIZE,             0                                 },
+   { EGL_ALPHA_MASK_SIZE,            0                                 },
+   { EGL_COLOR_BUFFER_TYPE,          EGL_RGB_BUFFER                    },
+   { EGL_RENDERABLE_TYPE,            EGL_OPENGL_ES2_BIT                },
+   { EGL_CONFORMANT,                 0                                 }
+};
+
+// These configs can override the base attribute list
+// NOTE: when adding a config here, don't forget to update eglCreate*Surface()
+
+// 565 configs
+static config_pair_t const config_0_attribute_list[] = {
+   { EGL_BUFFER_SIZE,     16 },
+   { EGL_ALPHA_SIZE,       0 },
+   { EGL_BLUE_SIZE,        5 },
+   { EGL_GREEN_SIZE,       6 },
+   { EGL_RED_SIZE,         5 },
+   { EGL_DEPTH_SIZE,       0 },
+   { EGL_CONFIG_ID,        0 },
+   { EGL_NATIVE_VISUAL_ID, GGL_PIXEL_FORMAT_RGB_565 },
+   { EGL_SURFACE_TYPE,     EGL_SWAP_BEHAVIOR_PRESERVED_BIT|EGL_WINDOW_BIT|EGL_PBUFFER_BIT|EGL_PIXMAP_BIT },
+};
+
+static config_pair_t const config_1_attribute_list[] = {
+   { EGL_BUFFER_SIZE,     16 },
+   { EGL_ALPHA_SIZE,       0 },
+   { EGL_BLUE_SIZE,        5 },
+   { EGL_GREEN_SIZE,       6 },
+   { EGL_RED_SIZE,         5 },
+   { EGL_DEPTH_SIZE,      16 },
+   { EGL_CONFIG_ID,        1 },
+   { EGL_NATIVE_VISUAL_ID, GGL_PIXEL_FORMAT_RGB_565 },
+   { EGL_SURFACE_TYPE,     EGL_SWAP_BEHAVIOR_PRESERVED_BIT|EGL_WINDOW_BIT|EGL_PBUFFER_BIT|EGL_PIXMAP_BIT },
+};
+
+// RGB 888 configs
+static config_pair_t const config_2_attribute_list[] = {
+   { EGL_BUFFER_SIZE,     32 },
+   { EGL_ALPHA_SIZE,       0 },
+   { EGL_BLUE_SIZE,        8 },
+   { EGL_GREEN_SIZE,       8 },
+   { EGL_RED_SIZE,         8 },
+   { EGL_DEPTH_SIZE,       0 },
+   { EGL_CONFIG_ID,        6 },
+   { EGL_NATIVE_VISUAL_ID, GGL_PIXEL_FORMAT_RGBX_8888 },
+   { EGL_SURFACE_TYPE,     EGL_SWAP_BEHAVIOR_PRESERVED_BIT|EGL_WINDOW_BIT|EGL_PBUFFER_BIT|EGL_PIXMAP_BIT },
+};
+
+static config_pair_t const config_3_attribute_list[] = {
+   { EGL_BUFFER_SIZE,     32 },
+   { EGL_ALPHA_SIZE,       0 },
+   { EGL_BLUE_SIZE,        8 },
+   { EGL_GREEN_SIZE,       8 },
+   { EGL_RED_SIZE,         8 },
+   { EGL_DEPTH_SIZE,      16 },
+   { EGL_CONFIG_ID,        7 },
+   { EGL_NATIVE_VISUAL_ID, GGL_PIXEL_FORMAT_RGBX_8888 },
+   { EGL_SURFACE_TYPE,     EGL_SWAP_BEHAVIOR_PRESERVED_BIT|EGL_WINDOW_BIT|EGL_PBUFFER_BIT|EGL_PIXMAP_BIT },
+};
+
+// 8888 configs
+static config_pair_t const config_4_attribute_list[] = {
+   { EGL_BUFFER_SIZE,     32 },
+   { EGL_ALPHA_SIZE,       8 },
+   { EGL_BLUE_SIZE,        8 },
+   { EGL_GREEN_SIZE,       8 },
+   { EGL_RED_SIZE,         8 },
+   { EGL_DEPTH_SIZE,       0 },
+   { EGL_CONFIG_ID,        2 },
+   { EGL_NATIVE_VISUAL_ID, GGL_PIXEL_FORMAT_RGBA_8888 },
+   { EGL_SURFACE_TYPE,     EGL_SWAP_BEHAVIOR_PRESERVED_BIT|EGL_WINDOW_BIT|EGL_PBUFFER_BIT|EGL_PIXMAP_BIT },
+};
+
+static config_pair_t const config_5_attribute_list[] = {
+   { EGL_BUFFER_SIZE,     32 },
+   { EGL_ALPHA_SIZE,       8 },
+   { EGL_BLUE_SIZE,        8 },
+   { EGL_GREEN_SIZE,       8 },
+   { EGL_RED_SIZE,         8 },
+   { EGL_DEPTH_SIZE,      16 },
+   { EGL_CONFIG_ID,        3 },
+   { EGL_NATIVE_VISUAL_ID, GGL_PIXEL_FORMAT_RGBA_8888 },
+   { EGL_SURFACE_TYPE,     EGL_SWAP_BEHAVIOR_PRESERVED_BIT|EGL_WINDOW_BIT|EGL_PBUFFER_BIT|EGL_PIXMAP_BIT },
+};
+
+// A8 configs
+static config_pair_t const config_6_attribute_list[] = {
+   { EGL_BUFFER_SIZE,      8 },
+   { EGL_ALPHA_SIZE,       8 },
+   { EGL_BLUE_SIZE,        0 },
+   { EGL_GREEN_SIZE,       0 },
+   { EGL_RED_SIZE,         0 },
+   { EGL_DEPTH_SIZE,       0 },
+   { EGL_CONFIG_ID,        4 },
+   { EGL_NATIVE_VISUAL_ID, GGL_PIXEL_FORMAT_A_8 },
+   { EGL_SURFACE_TYPE,     EGL_SWAP_BEHAVIOR_PRESERVED_BIT|EGL_WINDOW_BIT|EGL_PBUFFER_BIT|EGL_PIXMAP_BIT },
+};
+
+static config_pair_t const config_7_attribute_list[] = {
+   { EGL_BUFFER_SIZE,      8 },
+   { EGL_ALPHA_SIZE,       8 },
+   { EGL_BLUE_SIZE,        0 },
+   { EGL_GREEN_SIZE,       0 },
+   { EGL_RED_SIZE,         0 },
+   { EGL_DEPTH_SIZE,      16 },
+   { EGL_CONFIG_ID,        5 },
+   { EGL_NATIVE_VISUAL_ID, GGL_PIXEL_FORMAT_A_8 },
+   { EGL_SURFACE_TYPE,     EGL_SWAP_BEHAVIOR_PRESERVED_BIT|EGL_WINDOW_BIT|EGL_PBUFFER_BIT|EGL_PIXMAP_BIT },
+};
+
+static configs_t const gConfigs[] = {
+   { config_0_attribute_list, NELEM(config_0_attribute_list) },
+   { config_1_attribute_list, NELEM(config_1_attribute_list) },
+   { config_2_attribute_list, NELEM(config_2_attribute_list) },
+   { config_3_attribute_list, NELEM(config_3_attribute_list) },
+   { config_4_attribute_list, NELEM(config_4_attribute_list) },
+   { config_5_attribute_list, NELEM(config_5_attribute_list) },
+//   { config_6_attribute_list, NELEM(config_6_attribute_list) },
+//   { config_7_attribute_list, NELEM(config_7_attribute_list) },
+};
+
+static config_management_t const gConfigManagement[] = {
+   { EGL_BUFFER_SIZE,                config_management_t::atLeast },
+   { EGL_ALPHA_SIZE,                 config_management_t::atLeast },
+   { EGL_BLUE_SIZE,                  config_management_t::atLeast },
+   { EGL_GREEN_SIZE,                 config_management_t::atLeast },
+   { EGL_RED_SIZE,                   config_management_t::atLeast },
+   { EGL_DEPTH_SIZE,                 config_management_t::atLeast },
+   { EGL_STENCIL_SIZE,               config_management_t::atLeast },
+   { EGL_CONFIG_CAVEAT,              config_management_t::exact   },
+   { EGL_CONFIG_ID,                  config_management_t::exact   },
+   { EGL_LEVEL,                      config_management_t::exact   },
+   { EGL_MAX_PBUFFER_HEIGHT,         config_management_t::ignore   },
+   { EGL_MAX_PBUFFER_PIXELS,         config_management_t::ignore   },
+   { EGL_MAX_PBUFFER_WIDTH,          config_management_t::ignore   },
+   { EGL_NATIVE_RENDERABLE,          config_management_t::exact   },
+   { EGL_NATIVE_VISUAL_ID,           config_management_t::ignore   },
+   { EGL_NATIVE_VISUAL_TYPE,         config_management_t::exact   },
+   { EGL_SAMPLES,                    config_management_t::exact   },
+   { EGL_SAMPLE_BUFFERS,             config_management_t::exact   },
+   { EGL_SURFACE_TYPE,               config_management_t::mask    },
+   { EGL_TRANSPARENT_TYPE,           config_management_t::exact   },
+   { EGL_TRANSPARENT_BLUE_VALUE,     config_management_t::exact   },
+   { EGL_TRANSPARENT_GREEN_VALUE,    config_management_t::exact   },
+   { EGL_TRANSPARENT_RED_VALUE,      config_management_t::exact   },
+   { EGL_BIND_TO_TEXTURE_RGBA,       config_management_t::exact   },
+   { EGL_BIND_TO_TEXTURE_RGB,        config_management_t::exact   },
+   { EGL_MIN_SWAP_INTERVAL,          config_management_t::exact   },
+   { EGL_MAX_SWAP_INTERVAL,          config_management_t::exact   },
+   { EGL_LUMINANCE_SIZE,             config_management_t::atLeast },
+   { EGL_ALPHA_MASK_SIZE,            config_management_t::atLeast },
+   { EGL_COLOR_BUFFER_TYPE,          config_management_t::exact   },
+   { EGL_RENDERABLE_TYPE,            config_management_t::mask    },
+   { EGL_CONFORMANT,                 config_management_t::mask    }
+};
+
+
+static config_pair_t const config_defaults[] = {
+   // attributes that are not specified are simply ignored, if a particular
+   // one needs not be ignored, it must be specified here, eg:
+   // { EGL_SURFACE_TYPE, EGL_WINDOW_BIT },
+};
+
+// ----------------------------------------------------------------------------
+
+static status_t getConfigFormatInfo(EGLint configID,
+                                    int32_t& pixelFormat, int32_t& depthFormat)
+{
+   switch (configID) {
+   case 0:
+      pixelFormat = GGL_PIXEL_FORMAT_RGB_565;
+      depthFormat = 0;
+      break;
+   case 1:
+      pixelFormat = GGL_PIXEL_FORMAT_RGB_565;
+      depthFormat = GGL_PIXEL_FORMAT_Z_32;
+      break;
+   case 2:
+      pixelFormat = GGL_PIXEL_FORMAT_RGBA_8888;
+      depthFormat = 0;
+      break;
+   case 3:
+      pixelFormat = GGL_PIXEL_FORMAT_RGBA_8888;
+      depthFormat = GGL_PIXEL_FORMAT_Z_32;
+      break;
+   case 4:
+      pixelFormat = GGL_PIXEL_FORMAT_RGBA_8888;
+      depthFormat = 0;
+      break;
+   case 5:
+      pixelFormat = GGL_PIXEL_FORMAT_RGBA_8888;
+      depthFormat = GGL_PIXEL_FORMAT_Z_32;
+      break;
+   case 6:
+      pixelFormat = GGL_PIXEL_FORMAT_A_8;
+      depthFormat = 0;
+      break;
+   case 7:
+      pixelFormat = GGL_PIXEL_FORMAT_A_8;
+      depthFormat = GGL_PIXEL_FORMAT_Z_32;
+      break;
+   default:
+      return NAME_NOT_FOUND;
+   }
+   return NO_ERROR;
+}
+
+// ----------------------------------------------------------------------------
+
+template<typename T>
+static int binarySearch(T const sortedArray[], int first, int last, EGLint key)
+{
+   while (first <= last) {
+      int mid = (first + last) / 2;
+      if (key > sortedArray[mid].key) {
+         first = mid + 1;
+      } else if (key < sortedArray[mid].key) {
+         last = mid - 1;
+      } else {
+         return mid;
+      }
+   }
+   return -1;
+}
+
+static int isAttributeMatching(int i, EGLint attr, EGLint val)
+{
+   // look for the attribute in all of our configs
+   config_pair_t const* configFound = gConfigs[i].array;
+   int index = binarySearch<config_pair_t>(
+                  gConfigs[i].array,
+                  0, gConfigs[i].size-1,
+                  attr);
+   if (index < 0) {
+      configFound = config_base_attribute_list;
+      index = binarySearch<config_pair_t>(
+                 config_base_attribute_list,
+                 0, NELEM(config_base_attribute_list)-1,
+                 attr);
+   }
+   if (index >= 0) {
+      // attribute found, check if this config could match
+      int cfgMgtIndex = binarySearch<config_management_t>(
+                           gConfigManagement,
+                           0, NELEM(gConfigManagement)-1,
+                           attr);
+      if (cfgMgtIndex >= 0) {
+         bool match = gConfigManagement[cfgMgtIndex].match(
+                         val, configFound[index].value);
+         if (match) {
+            // this config matches
+            return 1;
+         }
+      } else {
+         // attribute not found. this should NEVER happen.
+      }
+   } else {
+      // error, this attribute doesn't exist
+   }
+   return 0;
+}
+
+static int makeCurrent(GLES2Context* gl)
+{
+   GLES2Context* current = (GLES2Context*)getGlThreadSpecific();
+   if (gl) {
+      egl_context_t* c = egl_context_t::context(gl);
+      if (c->flags & egl_context_t::IS_CURRENT) {
+         if (current != gl) {
+            // it is an error to set a context current, if it's already
+            // current to another thread
+            return -1;
+         }
+      } else {
+         if (current) {
+            // mark the current context as not current, and flush
+            glFlush();
+            egl_context_t::context(current)->flags &= ~egl_context_t::IS_CURRENT;
+         }
+      }
+      if (!(c->flags & egl_context_t::IS_CURRENT)) {
+         // The context is not current, make it current!
+         setGlThreadSpecific(gl);
+         c->flags |= egl_context_t::IS_CURRENT;
+      }
+   } else {
+      if (current) {
+         // mark the current context as not current, and flush
+         glFlush();
+         egl_context_t::context(current)->flags &= ~egl_context_t::IS_CURRENT;
+      }
+      // this thread has no context attached to it
+      setGlThreadSpecific(0);
+   }
+   return 0;
+}
+
+static EGLBoolean getConfigAttrib(EGLDisplay dpy, EGLConfig config,
+                                  EGLint attribute, EGLint *value)
+{
+   size_t numConfigs =  NELEM(gConfigs);
+   int index = (int)config;
+   if (uint32_t(index) >= numConfigs)
+      return setError(EGL_BAD_CONFIG, EGL_FALSE);
+
+   int attrIndex;
+   attrIndex = binarySearch<config_pair_t>(
+                  gConfigs[index].array,
+                  0, gConfigs[index].size-1,
+                  attribute);
+   if (attrIndex>=0) {
+      *value = gConfigs[index].array[attrIndex].value;
+      return EGL_TRUE;
+   }
+
+   attrIndex = binarySearch<config_pair_t>(
+                  config_base_attribute_list,
+                  0, NELEM(config_base_attribute_list)-1,
+                  attribute);
+   if (attrIndex>=0) {
+      *value = config_base_attribute_list[attrIndex].value;
+      return EGL_TRUE;
+   }
+   return setError(EGL_BAD_ATTRIBUTE, EGL_FALSE);
+}
+
+static EGLSurface createWindowSurface(EGLDisplay dpy, EGLConfig config,
+                                      NativeWindowType window, const EGLint *attrib_list)
+{
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_NO_SURFACE);
+   if (window == 0)
+      return setError(EGL_BAD_MATCH, EGL_NO_SURFACE);
+
+   EGLint surfaceType;
+   if (getConfigAttrib(dpy, config, EGL_SURFACE_TYPE, &surfaceType) == EGL_FALSE)
+      return EGL_FALSE;
+
+   if (!(surfaceType & EGL_WINDOW_BIT))
+      return setError(EGL_BAD_MATCH, EGL_NO_SURFACE);
+
+   if (reinterpret_cast<ANativeWindow*>(window)->common.magic !=
+         ANDROID_NATIVE_WINDOW_MAGIC) {
+      return setError(EGL_BAD_NATIVE_WINDOW, EGL_NO_SURFACE);
+   }
+
+   EGLint configID;
+   if (getConfigAttrib(dpy, config, EGL_CONFIG_ID, &configID) == EGL_FALSE)
+      return EGL_FALSE;
+
+   int32_t depthFormat;
+   int32_t pixelFormat;
+   if (getConfigFormatInfo(configID, pixelFormat, depthFormat) != NO_ERROR) {
+      return setError(EGL_BAD_MATCH, EGL_NO_SURFACE);
+   }
+
+   // FIXME: we don't have access to the pixelFormat here just yet.
+   // (it's possible that the surface is not fully initialized)
+   // maybe this should be done after the page-flip
+   //if (EGLint(info.format) != pixelFormat)
+   //    return setError(EGL_BAD_MATCH, EGL_NO_SURFACE);
+
+   egl_surface_t* surface;
+   surface = new egl_window_surface_v2_t(dpy, config, depthFormat,
+                                         reinterpret_cast<ANativeWindow*>(window));
+
+   if (!surface->initCheck()) {
+      // there was a problem in the ctor, the error
+      // flag has been set.
+      delete surface;
+      surface = 0;
+   }
+   return surface;
+}
+
+static EGLSurface createPixmapSurface(EGLDisplay dpy, EGLConfig config,
+                                      NativePixmapType pixmap, const EGLint *attrib_list)
+{
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_NO_SURFACE);
+   if (pixmap == 0)
+      return setError(EGL_BAD_MATCH, EGL_NO_SURFACE);
+
+   EGLint surfaceType;
+   if (getConfigAttrib(dpy, config, EGL_SURFACE_TYPE, &surfaceType) == EGL_FALSE)
+      return EGL_FALSE;
+
+   if (!(surfaceType & EGL_PIXMAP_BIT))
+      return setError(EGL_BAD_MATCH, EGL_NO_SURFACE);
+
+   if (reinterpret_cast<egl_native_pixmap_t*>(pixmap)->version !=
+         sizeof(egl_native_pixmap_t)) {
+      return setError(EGL_BAD_NATIVE_PIXMAP, EGL_NO_SURFACE);
+   }
+
+   EGLint configID;
+   if (getConfigAttrib(dpy, config, EGL_CONFIG_ID, &configID) == EGL_FALSE)
+      return EGL_FALSE;
+
+   int32_t depthFormat;
+   int32_t pixelFormat;
+   if (getConfigFormatInfo(configID, pixelFormat, depthFormat) != NO_ERROR) {
+      return setError(EGL_BAD_MATCH, EGL_NO_SURFACE);
+   }
+
+   if (reinterpret_cast<egl_native_pixmap_t *>(pixmap)->format != pixelFormat)
+      return setError(EGL_BAD_MATCH, EGL_NO_SURFACE);
+
+   egl_surface_t* surface =
+      new egl_pixmap_surface_t(dpy, config, depthFormat,
+                               reinterpret_cast<egl_native_pixmap_t*>(pixmap));
+
+   if (!surface->initCheck()) {
+      // there was a problem in the ctor, the error
+      // flag has been set.
+      delete surface;
+      surface = 0;
+   }
+   return surface;
+}
+
+static EGLSurface createPbufferSurface(EGLDisplay dpy, EGLConfig config,
+                                       const EGLint *attrib_list)
+{
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_NO_SURFACE);
+
+   EGLint surfaceType;
+   if (getConfigAttrib(dpy, config, EGL_SURFACE_TYPE, &surfaceType) == EGL_FALSE)
+      return EGL_FALSE;
+
+   if (!(surfaceType & EGL_PBUFFER_BIT))
+      return setError(EGL_BAD_MATCH, EGL_NO_SURFACE);
+
+   EGLint configID;
+   if (getConfigAttrib(dpy, config, EGL_CONFIG_ID, &configID) == EGL_FALSE)
+      return EGL_FALSE;
+
+   int32_t depthFormat;
+   int32_t pixelFormat;
+   if (getConfigFormatInfo(configID, pixelFormat, depthFormat) != NO_ERROR) {
+      return setError(EGL_BAD_MATCH, EGL_NO_SURFACE);
+   }
+
+   int32_t w = 0;
+   int32_t h = 0;
+   while (attrib_list[0]) {
+      if (attrib_list[0] == EGL_WIDTH)  w = attrib_list[1];
+      if (attrib_list[0] == EGL_HEIGHT) h = attrib_list[1];
+      attrib_list+=2;
+   }
+
+   egl_surface_t* surface =
+      new egl_pbuffer_surface_t(dpy, config, depthFormat, w, h, pixelFormat);
+
+   if (!surface->initCheck()) {
+      // there was a problem in the ctor, the error
+      // flag has been set.
+      delete surface;
+      surface = 0;
+   }
+   return surface;
+}
+
+// ----------------------------------------------------------------------------
+}; // namespace android
+// ----------------------------------------------------------------------------
+
+using namespace android;
+
+// ----------------------------------------------------------------------------
+// Initialization
+// ----------------------------------------------------------------------------
+
+EGLDisplay eglGetDisplay(NativeDisplayType display)
+{
+   puts("agl2:eglGetDisplay");
+#ifndef HAVE_ANDROID_OS
+   // this just needs to be done once
+   if (gGLKey == -1) {
+      pthread_mutex_lock(&gInitMutex);
+      if (gGLKey == -1)
+         pthread_key_create(&gGLKey, NULL);
+      pthread_mutex_unlock(&gInitMutex);
+   }
+#endif
+   if (display == EGL_DEFAULT_DISPLAY) {
+      EGLDisplay dpy = (EGLDisplay)1;
+      egl_display_t& d = egl_display_t::get_display(dpy);
+      d.type = display;
+      return dpy;
+   }
+   return EGL_NO_DISPLAY;
+}
+
+EGLBoolean eglInitialize(EGLDisplay dpy, EGLint *major, EGLint *minor)
+{
+   puts("agl2:eglInitialize");
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+
+   EGLBoolean res = EGL_TRUE;
+   egl_display_t& d = egl_display_t::get_display(dpy);
+
+   if (android_atomic_inc(&d.initialized) == 0) {
+      // initialize stuff here if needed
+      //pthread_mutex_lock(&gInitMutex);
+      //pthread_mutex_unlock(&gInitMutex);
+   }
+
+   if (res == EGL_TRUE) {
+      if (major != NULL) *major = VERSION_MAJOR;
+      if (minor != NULL) *minor = VERSION_MINOR;
+   }
+   return res;
+}
+
+EGLBoolean eglTerminate(EGLDisplay dpy)
+{
+   puts("agl2:eglTerminate");
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+
+   EGLBoolean res = EGL_TRUE;
+   egl_display_t& d = egl_display_t::get_display(dpy);
+   if (android_atomic_dec(&d.initialized) == 1) {
+      // TODO: destroy all resources (surfaces, contexts, etc...)
+      //pthread_mutex_lock(&gInitMutex);
+      //pthread_mutex_unlock(&gInitMutex);
+   }
+   return res;
+}
+
+// ----------------------------------------------------------------------------
+// configuration
+// ----------------------------------------------------------------------------
+
+EGLBoolean eglGetConfigs(   EGLDisplay dpy,
+                            EGLConfig *configs,
+                            EGLint config_size, EGLint *num_config)
+{
+   puts("agl2:eglGetConfigs");
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+
+   GLint numConfigs = NELEM(gConfigs);
+   if (!configs) {
+      *num_config = numConfigs;
+      return EGL_TRUE;
+   }
+   GLint i;
+   for (i=0 ; i<numConfigs && i<config_size ; i++) {
+      *configs++ = (EGLConfig)i;
+   }
+   *num_config = i;
+   return EGL_TRUE;
+}
+
+static const char * ATTRIBUTE_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_BLUE_VALUE",
+   "EGL_TRANSPARENT_GREEN_VALUE",
+   "EGL_TRANSPARENT_RED_VALUE",
+   "EGL_NONE",   /* Attrib list terminator */
+   "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_MATCH_NATIVE_PIXMAP",   /* Pseudo-attribute (not queryable) */
+   "EGL_CONFORMANT",
+};
+
+EGLBoolean eglChooseConfig( EGLDisplay dpy, const EGLint *attrib_list,
+                            EGLConfig *configs, EGLint config_size,
+                            EGLint *num_config)
+{
+   puts("agl2:eglChooseConfig");
+   LOGD("\n***\n***\n agl2:LOGD eglChooseConfig \n***\n***\n");
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+
+   if (ggl_unlikely(num_config==0)) {
+      LOGD("\n***\n***\n num_config==0 \n***\n***\n");
+      return setError(EGL_BAD_PARAMETER, EGL_FALSE);
+   }
+
+   if (ggl_unlikely(attrib_list==0)) {
+      /*
+       * A NULL attrib_list should be treated as though it was an empty
+       * one (terminated with EGL_NONE) as defined in
+       * section 3.4.1 "Querying Configurations" in the EGL specification.
+       */
+      LOGD("\n***\n***\n attrib_list==0 \n***\n***\n");
+      static const EGLint dummy = EGL_NONE;
+      attrib_list = &dummy;
+   }
+
+   for (const EGLint * attrib = attrib_list; *attrib != EGL_NONE; attrib += 2) {
+      LOGD("eglChooseConfig %s(%.4X): %d \n", ATTRIBUTE_NAMES[attrib[0] - EGL_BUFFER_SIZE], attrib[0], attrib[1]);
+      if (EGL_BUFFER_SIZE > attrib[0] || EGL_CONFORMANT < attrib[0])
+         LOGD("eglChooseConfig invalid config attrib: 0x%.4X=%d \n", attrib[0], attrib[1]);
+   }
+
+   int numAttributes = 0;
+   int numConfigs =  NELEM(gConfigs);
+   uint32_t possibleMatch = (1<<numConfigs)-1;
+   while (possibleMatch && *attrib_list != EGL_NONE) {
+      numAttributes++;
+      EGLint attr = *attrib_list++;
+      EGLint val  = *attrib_list++;
+      for (int i=0 ; possibleMatch && i<numConfigs ; i++) {
+         if (!(possibleMatch & (1<<i)))
+            continue;
+         if (isAttributeMatching(i, attr, val) == 0) {
+            LOGD("!isAttributeMatching config(%d) %s=%d \n", i, ATTRIBUTE_NAMES[attr - EGL_BUFFER_SIZE], val);
+            possibleMatch &= ~(1<<i);
+         }
+      }
+   }
+
+   LOGD("eglChooseConfig possibleMatch=%.4X \n", possibleMatch);
+
+   // now, handle the attributes which have a useful default value
+   for (size_t j=0 ; possibleMatch && j<NELEM(config_defaults) ; j++) {
+      // see if this attribute was specified, if not, apply its
+      // default value
+      if (binarySearch<config_pair_t>(
+               (config_pair_t const*)attrib_list,
+               0, numAttributes-1,
+               config_defaults[j].key) < 0) {
+         for (int i=0 ; possibleMatch && i<numConfigs ; i++) {
+            if (!(possibleMatch & (1<<i)))
+               continue;
+            if (isAttributeMatching(i,
+                                    config_defaults[j].key,
+                                    config_defaults[j].value) == 0) {
+               possibleMatch &= ~(1<<i);
+            }
+         }
+      }
+   }
+
+   // return the configurations found
+   int n=0;
+   if (possibleMatch) {
+      if (configs) {
+         for (int i=0 ; config_size && i<numConfigs ; i++) {
+            if (possibleMatch & (1<<i)) {
+               *configs++ = (EGLConfig)i;
+               config_size--;
+               n++;
+            }
+         }
+      } else {
+         for (int i=0 ; i<numConfigs ; i++) {
+            if (possibleMatch & (1<<i)) {
+               n++;
+            }
+         }
+      }
+   }
+   *num_config = n;
+   LOGD("\n***\n***\n num_config==%d \n***\n***\n", *num_config);
+   return EGL_TRUE;
+}
+
+EGLBoolean eglGetConfigAttrib(EGLDisplay dpy, EGLConfig config,
+                              EGLint attribute, EGLint *value)
+{
+   puts("agl2:eglGetConfigAttrib");
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+
+   return getConfigAttrib(dpy, config, attribute, value);
+}
+
+// ----------------------------------------------------------------------------
+// surfaces
+// ----------------------------------------------------------------------------
+
+EGLSurface eglCreateWindowSurface(  EGLDisplay dpy, EGLConfig config,
+                                    NativeWindowType window,
+                                    const EGLint *attrib_list)
+{
+   puts("agl2:eglCreateWindowSurface");
+   return createWindowSurface(dpy, config, window, attrib_list);
+}
+
+EGLSurface eglCreatePixmapSurface(  EGLDisplay dpy, EGLConfig config,
+                                    NativePixmapType pixmap,
+                                    const EGLint *attrib_list)
+{
+   puts("agl2:eglCreatePixmapSurface");
+   return createPixmapSurface(dpy, config, pixmap, attrib_list);
+}
+
+EGLSurface eglCreatePbufferSurface( EGLDisplay dpy, EGLConfig config,
+                                    const EGLint *attrib_list)
+{
+   puts("agl2:eglCreatePbufferSurface");
+   return createPbufferSurface(dpy, config, attrib_list);
+}
+
+EGLBoolean eglDestroySurface(EGLDisplay dpy, EGLSurface eglSurface)
+{
+   puts("agl2:eglDestroySurface");
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+   if (eglSurface != EGL_NO_SURFACE) {
+      egl_surface_t* surface( static_cast<egl_surface_t*>(eglSurface) );
+      if (!surface->isValid())
+         return setError(EGL_BAD_SURFACE, EGL_FALSE);
+      if (surface->dpy != dpy)
+         return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+      if (surface->ctx) {
+         // FIXME: this surface is current check what the spec says
+         surface->disconnect();
+         surface->ctx = 0;
+      }
+      delete surface;
+   }
+   return EGL_TRUE;
+}
+
+EGLBoolean eglQuerySurface( EGLDisplay dpy, EGLSurface eglSurface,
+                            EGLint attribute, EGLint *value)
+{
+   puts("agl2:eglQuerySurface");
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+   egl_surface_t* surface = static_cast<egl_surface_t*>(eglSurface);
+   if (!surface->isValid())
+      return setError(EGL_BAD_SURFACE, EGL_FALSE);
+   if (surface->dpy != dpy)
+      return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+
+   EGLBoolean ret = EGL_TRUE;
+   switch (attribute) {
+   case EGL_CONFIG_ID:
+      ret = getConfigAttrib(dpy, surface->config, EGL_CONFIG_ID, value);
+      break;
+   case EGL_WIDTH:
+      *value = surface->getWidth();
+      break;
+   case EGL_HEIGHT:
+      *value = surface->getHeight();
+      break;
+   case EGL_LARGEST_PBUFFER:
+      // not modified for a window or pixmap surface
+      break;
+   case EGL_TEXTURE_FORMAT:
+      *value = EGL_NO_TEXTURE;
+      break;
+   case EGL_TEXTURE_TARGET:
+      *value = EGL_NO_TEXTURE;
+      break;
+   case EGL_MIPMAP_TEXTURE:
+      *value = EGL_FALSE;
+      break;
+   case EGL_MIPMAP_LEVEL:
+      *value = 0;
+      break;
+   case EGL_RENDER_BUFFER:
+      // TODO: return the real RENDER_BUFFER here
+      *value = EGL_BACK_BUFFER;
+      break;
+   case EGL_HORIZONTAL_RESOLUTION:
+      // pixel/mm * EGL_DISPLAY_SCALING
+      *value = surface->getHorizontalResolution();
+      break;
+   case EGL_VERTICAL_RESOLUTION:
+      // pixel/mm * EGL_DISPLAY_SCALING
+      *value = surface->getVerticalResolution();
+      break;
+   case EGL_PIXEL_ASPECT_RATIO: {
+      // w/h * EGL_DISPLAY_SCALING
+      int wr = surface->getHorizontalResolution();
+      int hr = surface->getVerticalResolution();
+      *value = (wr * EGL_DISPLAY_SCALING) / hr;
+   }
+   break;
+   case EGL_SWAP_BEHAVIOR:
+      *value = surface->getSwapBehavior();
+      break;
+   default:
+      ret = setError(EGL_BAD_ATTRIBUTE, EGL_FALSE);
+   }
+   return ret;
+}
+
+EGLContext eglCreateContext(EGLDisplay dpy, EGLConfig config,
+                            EGLContext share_list, const EGLint *attrib_list)
+{
+   puts("agl2:eglCreateContext");
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_NO_SURFACE);
+
+   GLES2Context* gl = new GLES2Context();//ogles_init(sizeof(egl_context_t));
+   if (!gl) return setError(EGL_BAD_ALLOC, EGL_NO_CONTEXT);
+
+   //egl_context_t* c = static_cast<egl_context_t*>(gl->rasterizer.base);
+   egl_context_t * c = &gl->egl;
+   c->flags = egl_context_t::NEVER_CURRENT;
+   c->dpy = dpy;
+   c->config = config;
+   c->read = 0;
+   c->draw = 0;
+   
+   c->frame = 0;
+   c->lastSwapTime = clock();
+   c->accumulateSeconds = 0;
+   return (EGLContext)gl;
+}
+
+EGLBoolean eglDestroyContext(EGLDisplay dpy, EGLContext ctx)
+{
+   puts("agl2:eglDestroyContext");
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+   egl_context_t* c = egl_context_t::context(ctx);
+   if (c->flags & egl_context_t::IS_CURRENT)
+      setGlThreadSpecific(0);
+   //ogles_uninit((GLES2Context*)ctx);
+   delete (GLES2Context*)ctx;
+   return EGL_TRUE;
+}
+
+EGLBoolean eglMakeCurrent(  EGLDisplay dpy, EGLSurface draw,
+                            EGLSurface read, EGLContext ctx)
+{
+   puts("agl2:eglMakeCurrent");
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+   if (draw) {
+      egl_surface_t* s = (egl_surface_t*)draw;
+      if (!s->isValid())
+         return setError(EGL_BAD_SURFACE, EGL_FALSE);
+      if (s->dpy != dpy)
+         return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+      // TODO: check that draw is compatible with the context
+   }
+   if (read && read!=draw) {
+      egl_surface_t* s = (egl_surface_t*)read;
+      if (!s->isValid())
+         return setError(EGL_BAD_SURFACE, EGL_FALSE);
+      if (s->dpy != dpy)
+         return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+      // TODO: check that read is compatible with the context
+   }
+
+   EGLContext current_ctx = EGL_NO_CONTEXT;
+
+   if ((read == EGL_NO_SURFACE && draw == EGL_NO_SURFACE) && (ctx != EGL_NO_CONTEXT))
+      return setError(EGL_BAD_MATCH, EGL_FALSE);
+
+   if ((read != EGL_NO_SURFACE || draw != EGL_NO_SURFACE) && (ctx == EGL_NO_CONTEXT))
+      return setError(EGL_BAD_MATCH, EGL_FALSE);
+
+   if (ctx == EGL_NO_CONTEXT) {
+      // if we're detaching, we need the current context
+      current_ctx = (EGLContext)getGlThreadSpecific();
+   } else {
+      egl_context_t* c = egl_context_t::context(ctx);
+      egl_surface_t* d = (egl_surface_t*)draw;
+      egl_surface_t* r = (egl_surface_t*)read;
+      if ((d && d->ctx && d->ctx != ctx) ||
+            (r && r->ctx && r->ctx != ctx)) {
+         // one of the surface is bound to a context in another thread
+         return setError(EGL_BAD_ACCESS, EGL_FALSE);
+      }
+   }
+
+   GLES2Context* gl = (GLES2Context*)ctx;
+   if (makeCurrent(gl) == 0) {
+      if (ctx) {
+         egl_context_t* c = egl_context_t::context(ctx);
+         egl_surface_t* d = (egl_surface_t*)draw;
+         egl_surface_t* r = (egl_surface_t*)read;
+
+         if (c->draw) {
+            egl_surface_t* s = reinterpret_cast<egl_surface_t*>(c->draw);
+            s->disconnect();
+         }
+         if (c->read) {
+            // FIXME: unlock/disconnect the read surface too
+         }
+
+         c->draw = draw;
+         c->read = read;
+
+         if (c->flags & egl_context_t::NEVER_CURRENT) {
+            c->flags &= ~egl_context_t::NEVER_CURRENT;
+            GLint w = 0;
+            GLint h = 0;
+            if (draw) {
+               w = d->getWidth();
+               h = d->getHeight();
+            }
+            gl->rasterizer.interface.Viewport(&gl->rasterizer.interface, 0, 0, w, h);
+            //ogles_surfaceport(gl, 0, 0);
+            //ogles_viewport(gl, 0, 0, w, h);
+            //ogles_scissor(gl, 0, 0, w, h);
+         }
+         if (d) {
+            if (d->connect() == EGL_FALSE) {
+               return EGL_FALSE;
+            }
+            d->ctx = ctx;
+            d->bindDrawSurface(gl);
+         }
+         if (r) {
+            // FIXME: lock/connect the read surface too
+            r->ctx = ctx;
+            r->bindReadSurface(gl);
+         }
+      } else {
+         // if surfaces were bound to the context bound to this thread
+         // mark then as unbound.
+         if (current_ctx) {
+            egl_context_t* c = egl_context_t::context(current_ctx);
+            egl_surface_t* d = (egl_surface_t*)c->draw;
+            egl_surface_t* r = (egl_surface_t*)c->read;
+            if (d) {
+               c->draw = 0;
+               d->ctx = EGL_NO_CONTEXT;
+               d->disconnect();
+            }
+            if (r) {
+               c->read = 0;
+               r->ctx = EGL_NO_CONTEXT;
+               // FIXME: unlock/disconnect the read surface too
+            }
+         }
+      }
+      return EGL_TRUE;
+   }
+   return setError(EGL_BAD_ACCESS, EGL_FALSE);
+}
+
+EGLContext eglGetCurrentContext(void)
+{
+   // eglGetCurrentContext returns the current EGL rendering context,
+   // as specified by eglMakeCurrent. If no context is current,
+   // EGL_NO_CONTEXT is returned.
+   return (EGLContext)getGlThreadSpecific();
+}
+
+EGLSurface eglGetCurrentSurface(EGLint readdraw)
+{
+   // eglGetCurrentSurface returns the read or draw surface attached
+   // to the current EGL rendering context, as specified by eglMakeCurrent.
+   // If no context is current, EGL_NO_SURFACE is returned.
+   EGLContext ctx = (EGLContext)getGlThreadSpecific();
+   if (ctx == EGL_NO_CONTEXT) return EGL_NO_SURFACE;
+   egl_context_t* c = egl_context_t::context(ctx);
+   if (readdraw == EGL_READ) {
+      return c->read;
+   } else if (readdraw == EGL_DRAW) {
+      return c->draw;
+   }
+   return setError(EGL_BAD_ATTRIBUTE, EGL_NO_SURFACE);
+}
+
+EGLDisplay eglGetCurrentDisplay(void)
+{
+   // eglGetCurrentDisplay returns the current EGL display connection
+   // for the current EGL rendering context, as specified by eglMakeCurrent.
+   // If no context is current, EGL_NO_DISPLAY is returned.
+   EGLContext ctx = (EGLContext)getGlThreadSpecific();
+   if (ctx == EGL_NO_CONTEXT) return EGL_NO_DISPLAY;
+   egl_context_t* c = egl_context_t::context(ctx);
+   return c->dpy;
+}
+
+EGLBoolean eglQueryContext( EGLDisplay dpy, EGLContext ctx,
+                            EGLint attribute, EGLint *value)
+{
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+   egl_context_t* c = egl_context_t::context(ctx);
+   switch (attribute) {
+   case EGL_CONFIG_ID:
+      // Returns the ID of the EGL frame buffer configuration with
+      // respect to which the context was created
+      return getConfigAttrib(dpy, c->config, EGL_CONFIG_ID, value);
+   }
+   return setError(EGL_BAD_ATTRIBUTE, EGL_FALSE);
+}
+
+EGLBoolean eglWaitGL(void)
+{
+   return EGL_TRUE;
+}
+
+EGLBoolean eglWaitNative(EGLint engine)
+{
+   return EGL_TRUE;
+}
+
+EGLBoolean eglSwapBuffers(EGLDisplay dpy, EGLSurface draw)
+{
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+
+   egl_surface_t* d = static_cast<egl_surface_t*>(draw);
+   if (!d->isValid())
+      return setError(EGL_BAD_SURFACE, EGL_FALSE);
+   if (d->dpy != dpy)
+      return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+
+   // post the surface
+   d->swapBuffers();
+
+   // if it's bound to a context, update the buffer
+   if (d->ctx != EGL_NO_CONTEXT) {
+      d->bindDrawSurface((GLES2Context*)d->ctx);
+      // if this surface is also the read surface of the context
+      // it is bound to, make sure to update the read buffer as well.
+      // The EGL spec is a little unclear about this.
+      egl_context_t* c = egl_context_t::context(d->ctx);
+      if (c->read == draw) {
+         d->bindReadSurface((GLES2Context*)d->ctx);
+      }
+      clock_t time = clock();
+      float elapsed = (float)(time - c->lastSwapTime) / CLOCKS_PER_SEC;
+      c->accumulateSeconds += elapsed;
+      c->frame++;
+//      LOGD("agl2: eglSwapBuffers elapsed=%.2fms \n*", elapsed * 1000);
+      if (20 == c->frame) {
+         float avg = c->accumulateSeconds / c->frame;
+         LOGD("\n*\n* agl2: eglSwapBuffers %u frame avg fps=%.1f elapsed=%.2fms \n*",
+              c->frame, 1 / avg, avg * 1000);
+         c->frame = 0;
+         c->accumulateSeconds = 0;
+      }
+      c->lastSwapTime = time;
+   }
+
+   return EGL_TRUE;
+}
+
+EGLBoolean eglCopyBuffers(  EGLDisplay dpy, EGLSurface surface,
+                            NativePixmapType target)
+{
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+   // TODO: eglCopyBuffers()
+   return EGL_FALSE;
+}
+
+EGLint eglGetError(void)
+{
+   return getError();
+}
+
+const char* eglQueryString(EGLDisplay dpy, EGLint name)
+{
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, (const char*)0);
+
+   switch (name) {
+   case EGL_VENDOR:
+      return gVendorString;
+   case EGL_VERSION:
+      return gVersionString;
+   case EGL_EXTENSIONS:
+      return gExtensionsString;
+   case EGL_CLIENT_APIS:
+      return gClientApiString;
+   }
+   return setError(EGL_BAD_PARAMETER, (const char *)0);
+}
+
+// ----------------------------------------------------------------------------
+// EGL 1.1
+// ----------------------------------------------------------------------------
+
+EGLBoolean eglSurfaceAttrib(
+   EGLDisplay dpy, EGLSurface surface, EGLint attribute, EGLint value)
+{
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+   // TODO: eglSurfaceAttrib()
+   return setError(EGL_BAD_PARAMETER, EGL_FALSE);
+}
+
+EGLBoolean eglBindTexImage(
+   EGLDisplay dpy, EGLSurface surface, EGLint buffer)
+{
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+   // TODO: eglBindTexImage()
+   return setError(EGL_BAD_PARAMETER, EGL_FALSE);
+}
+
+EGLBoolean eglReleaseTexImage(
+   EGLDisplay dpy, EGLSurface surface, EGLint buffer)
+{
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+   // TODO: eglReleaseTexImage()
+   return setError(EGL_BAD_PARAMETER, EGL_FALSE);
+}
+
+EGLBoolean eglSwapInterval(EGLDisplay dpy, EGLint interval)
+{
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+   // TODO: eglSwapInterval()
+   return EGL_TRUE;
+}
+
+// ----------------------------------------------------------------------------
+// EGL 1.2
+// ----------------------------------------------------------------------------
+
+EGLBoolean eglBindAPI(EGLenum api)
+{
+   if (api != EGL_OPENGL_ES_API)
+      return setError(EGL_BAD_PARAMETER, EGL_FALSE);
+   return EGL_TRUE;
+}
+
+EGLenum eglQueryAPI(void)
+{
+   return EGL_OPENGL_ES_API;
+}
+
+EGLBoolean eglWaitClient(void)
+{
+   glFinish();
+   return EGL_TRUE;
+}
+
+EGLBoolean eglReleaseThread(void)
+{
+   // TODO: eglReleaseThread()
+   return EGL_TRUE;
+}
+
+EGLSurface eglCreatePbufferFromClientBuffer(
+   EGLDisplay dpy, EGLenum buftype, EGLClientBuffer buffer,
+   EGLConfig config, const EGLint *attrib_list)
+{
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_NO_SURFACE);
+   // TODO: eglCreatePbufferFromClientBuffer()
+   return setError(EGL_BAD_PARAMETER, EGL_NO_SURFACE);
+}
+
+// ----------------------------------------------------------------------------
+// EGL_EGLEXT_VERSION 3
+// ----------------------------------------------------------------------------
+
+void (*eglGetProcAddress (const char *procname))()
+{
+   extention_map_t const * const map = gExtentionMap;
+   for (uint32_t i=0 ; i<NELEM(gExtentionMap) ; i++) {
+      if (!strcmp(procname, map[i].name)) {
+         return map[i].address;
+      }
+   }
+   return NULL;
+}
+
+EGLBoolean eglLockSurfaceKHR(EGLDisplay dpy, EGLSurface surface,
+                             const EGLint *attrib_list)
+{
+   EGLBoolean result = EGL_FALSE;
+   return result;
+}
+
+EGLBoolean eglUnlockSurfaceKHR(EGLDisplay dpy, EGLSurface surface)
+{
+   EGLBoolean result = EGL_FALSE;
+   return result;
+}
+
+EGLImageKHR eglCreateImageKHR(EGLDisplay dpy, EGLContext ctx, EGLenum target,
+                              EGLClientBuffer buffer, const EGLint *attrib_list)
+{
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE) {
+      return setError(EGL_BAD_DISPLAY, EGL_NO_IMAGE_KHR);
+   }
+   if (ctx != EGL_NO_CONTEXT) {
+      return setError(EGL_BAD_CONTEXT, EGL_NO_IMAGE_KHR);
+   }
+   if (target != EGL_NATIVE_BUFFER_ANDROID) {
+      return setError(EGL_BAD_PARAMETER, EGL_NO_IMAGE_KHR);
+   }
+
+   android_native_buffer_t* native_buffer = (android_native_buffer_t*)buffer;
+
+   if (native_buffer->common.magic != ANDROID_NATIVE_BUFFER_MAGIC)
+      return setError(EGL_BAD_PARAMETER, EGL_NO_IMAGE_KHR);
+
+   if (native_buffer->common.version != sizeof(android_native_buffer_t))
+      return setError(EGL_BAD_PARAMETER, EGL_NO_IMAGE_KHR);
+
+   switch (native_buffer->format) {
+   case HAL_PIXEL_FORMAT_RGBA_8888:
+   case HAL_PIXEL_FORMAT_RGBX_8888:
+   case HAL_PIXEL_FORMAT_RGB_888:
+   case HAL_PIXEL_FORMAT_RGB_565:
+   case HAL_PIXEL_FORMAT_BGRA_8888:
+   case HAL_PIXEL_FORMAT_RGBA_5551:
+   case HAL_PIXEL_FORMAT_RGBA_4444:
+      break;
+   default:
+      return setError(EGL_BAD_PARAMETER, EGL_NO_IMAGE_KHR);
+   }
+
+   native_buffer->common.incRef(&native_buffer->common);
+   return (EGLImageKHR)native_buffer;
+}
+
+EGLBoolean eglDestroyImageKHR(EGLDisplay dpy, EGLImageKHR img)
+{
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE) {
+      return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+   }
+
+   android_native_buffer_t* native_buffer = (android_native_buffer_t*)img;
+
+   if (native_buffer->common.magic != ANDROID_NATIVE_BUFFER_MAGIC)
+      return setError(EGL_BAD_PARAMETER, EGL_FALSE);
+
+   if (native_buffer->common.version != sizeof(android_native_buffer_t))
+      return setError(EGL_BAD_PARAMETER, EGL_FALSE);
+
+   native_buffer->common.decRef(&native_buffer->common);
+
+   return EGL_TRUE;
+}
+
+// ----------------------------------------------------------------------------
+// ANDROID extensions
+// ----------------------------------------------------------------------------
+
+EGLBoolean eglSetSwapRectangleANDROID(EGLDisplay dpy, EGLSurface draw,
+                                      EGLint left, EGLint top, EGLint width, EGLint height)
+{
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+
+   egl_surface_t* d = static_cast<egl_surface_t*>(draw);
+   if (!d->isValid())
+      return setError(EGL_BAD_SURFACE, EGL_FALSE);
+   if (d->dpy != dpy)
+      return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+
+   // post the surface
+   d->setSwapRectangle(left, top, width, height);
+
+   return EGL_TRUE;
+}
diff --git a/opengl/libagl2/src/get.cpp b/opengl/libagl2/src/get.cpp
new file mode 100644
index 0000000..13c28ce
--- /dev/null
+++ b/opengl/libagl2/src/get.cpp
@@ -0,0 +1,79 @@
+#include "gles2context.h"
+
+static char const * const gVendorString     = "Android";
+static char const * const gRendererString   = "Android PixelFlinger2 0.0";
+static char const * const gVersionString    = "OpenGL ES 2.0";
+static char const * const gExtensionsString =
+//   "GL_OES_byte_coordinates "              // OK
+//   "GL_OES_fixed_point "                   // OK
+//   "GL_OES_single_precision "              // OK
+//   "GL_OES_read_format "                   // OK
+//   "GL_OES_compressed_paletted_texture "   // OK
+//   "GL_OES_draw_texture "                  // OK
+//   "GL_OES_matrix_get "                    // OK
+//   "GL_OES_query_matrix "                  // OK
+//   //        "GL_OES_point_size_array "              // TODO
+//   //        "GL_OES_point_sprite "                  // TODO
+//   "GL_OES_EGL_image "                     // OK
+//#ifdef GL_OES_compressed_ETC1_RGB8_texture
+//   "GL_OES_compressed_ETC1_RGB8_texture "  // OK
+//#endif
+//   "GL_ARB_texture_compression "           // OK
+//   "GL_ARB_texture_non_power_of_two "      // OK
+//   "GL_ANDROID_user_clip_plane "           // OK
+//   "GL_ANDROID_vertex_buffer_object "      // OK
+//   "GL_ANDROID_generate_mipmap "           // OK
+   ""
+   ;
+
+void glGetIntegerv(GLenum pname, GLint* params)
+{
+   switch (pname) {
+   case GL_MAX_TEXTURE_SIZE :
+      *params = 4096; // limit is in precision of texcoord calculation, which uses 16.16
+      break;
+   case GL_MAX_VERTEX_ATTRIBS:
+      *params = GGL_MAXVERTEXATTRIBS;
+      break;
+   case GL_MAX_VERTEX_UNIFORM_VECTORS:
+      *params = GGL_MAXVERTEXUNIFORMVECTORS;
+      break;
+   case GL_MAX_VARYING_VECTORS:
+      *params = GGL_MAXVARYINGVECTORS;
+      break;
+   case GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS:
+      *params = GGL_MAXCOMBINEDTEXTUREIMAGEUNITS;
+      break;
+   case GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS:
+      *params = GGL_MAXVERTEXTEXTUREIMAGEUNITS;
+      break;
+   case GL_MAX_TEXTURE_IMAGE_UNITS:
+      *params = GGL_MAXTEXTUREIMAGEUNITS;
+      break;
+   case GL_MAX_FRAGMENT_UNIFORM_VECTORS:
+      *params = GGL_MAXFRAGMENTUNIFORMVECTORS;
+      break;
+   case GL_ALIASED_LINE_WIDTH_RANGE:
+      *params = 1; // TODO: not implemented
+      break;
+   default:
+      LOGD("agl2: glGetIntegerv 0x%.4X", pname);
+      assert(0);
+   }
+}
+
+const GLubyte* glGetString(GLenum name)
+{
+   switch (name) {
+   case GL_VENDOR:
+      return (const GLubyte*)gVendorString;
+   case GL_RENDERER:
+      return (const GLubyte*)gRendererString;
+   case GL_VERSION:
+      return (const GLubyte*)gVersionString;
+   case GL_EXTENSIONS:
+      return (const GLubyte*)gExtensionsString;
+   }
+   assert(0); //(c, GL_INVALID_ENUM);
+   return 0;
+}
diff --git a/opengl/libagl2/src/gles2context.h b/opengl/libagl2/src/gles2context.h
new file mode 100644
index 0000000..cec0340
--- /dev/null
+++ b/opengl/libagl2/src/gles2context.h
@@ -0,0 +1,166 @@
+#define _SIZE_T_DEFINED_
+typedef unsigned int size_t;
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+#include <GLES/gl.h>
+#include <GLES/glext.h>
+
+#include <utils/threads.h>
+#include <pthread.h>
+
+#include <cutils/log.h>
+
+#include <assert.h>
+
+#ifdef __arm__
+#ifndef __location__
+#define __HIERALLOC_STRING_0__(s)   #s
+#define __HIERALLOC_STRING_1__(s)   __HIERALLOC_STRING_0__(s)
+#define __HIERALLOC_STRING_2__      __HIERALLOC_STRING_1__(__LINE__)
+#define __location__                __FILE__ ":" __HIERALLOC_STRING_2__
+#endif
+#undef assert
+#define assert(EXPR) { do { if (!(EXPR)) {LOGD("\n*\n*\n*\n* assert fail: '"#EXPR"' at "__location__"\n*\n*\n*\n*"); exit(EXIT_FAILURE); } } while (false); }
+//#define printf LOGD
+#else // #ifdef __arm__
+//#define LOGD printf
+#endif // #ifdef __arm__
+
+
+#include <pixelflinger2/pixelflinger2_format.h>
+#include <pixelflinger2/pixelflinger2.h>
+
+#include <map>
+
+typedef uint8_t                 GGLubyte;               // ub
+
+#define ggl_likely(x)   __builtin_expect(!!(x), 1)
+#define ggl_unlikely(x) __builtin_expect(!!(x), 0)
+
+#undef NELEM
+#define NELEM(x) (sizeof(x)/sizeof(*(x)))
+
+template<typename T>
+inline T max(T a, T b)
+{
+   return a<b ? b : a;
+}
+
+template<typename T>
+inline T min(T a, T b)
+{
+   return a<b ? a : b;
+}
+
+struct egl_context_t {
+   enum {
+      IS_CURRENT      =   0x00010000,
+      NEVER_CURRENT   =   0x00020000
+   };
+   uint32_t            flags;
+   EGLDisplay          dpy;
+   EGLConfig           config;
+   EGLSurface          read;
+   EGLSurface          draw;
+
+   unsigned frame;
+   clock_t lastSwapTime;
+   float accumulateSeconds;
+   
+   static inline egl_context_t* context(EGLContext ctx);
+};
+
+struct GLES2Context;
+
+#ifdef HAVE_ANDROID_OS
+#include <bionic_tls.h>
+// We have a dedicated TLS slot in bionic
+inline void setGlThreadSpecific(GLES2Context *value)
+{
+   ((uint32_t *)__get_tls())[TLS_SLOT_OPENGL] = (uint32_t)value;
+}
+inline GLES2Context* getGlThreadSpecific()
+{
+   return (GLES2Context *)(((unsigned *)__get_tls())[TLS_SLOT_OPENGL]);
+}
+#else
+extern pthread_key_t gGLKey;
+inline void setGlThreadSpecific(GLES2Context *value)
+{
+   pthread_setspecific(gGLKey, value);
+}
+inline GLES2Context* getGlThreadSpecific()
+{
+   return static_cast<GLES2Context*>(pthread_getspecific(gGLKey));
+}
+#endif
+
+struct VBO {
+   unsigned size;
+   GLenum usage;
+   void * data;
+};
+
+struct GLES2Context {
+   GGLContext rasterizer;
+   egl_context_t egl;
+   GGLInterface * iface; // shortcut to &rasterizer.interface
+
+   struct VertexState {
+      struct VertAttribPointer {
+         unsigned size; // number of values per vertex
+         GLenum type;  // data type
+         unsigned stride; // bytes
+         const void * ptr;
+bool normalized :
+         1;
+bool enabled :
+         1;
+      } attribs [GGL_MAXVERTEXATTRIBS];
+
+      VBO * vbo, * indices;
+      std::map<GLuint, VBO *> vbos;
+      GLuint free;
+
+      Vector4 defaultAttribs [GGL_MAXVERTEXATTRIBS];
+   } vert;
+
+   struct TextureState {
+      GGLTexture * tmus[GGL_MAXCOMBINEDTEXTUREIMAGEUNITS];
+      int sampler2tmu[GGL_MAXCOMBINEDTEXTUREIMAGEUNITS]; // sampler2tmu[sampler] is index of tmu, -1 means not used
+      unsigned active;
+      std::map<GLuint, GGLTexture *> textures;
+      GLuint free; // first possible free name
+      GGLTexture * tex2D, * texCube; // default textures
+      unsigned unpack;
+      
+      void UpdateSampler(GGLInterface * iface, unsigned tmu);
+   } tex;
+
+   GLES2Context();
+   void InitializeTextures();
+   void InitializeVertices();
+
+   ~GLES2Context();
+   void UninitializeTextures();
+   void UninitializeVertices();
+
+   static inline GLES2Context* get() {
+      return getGlThreadSpecific();
+   }
+};
+
+inline egl_context_t* egl_context_t::context(EGLContext ctx)
+{
+   GLES2Context* const gl = static_cast<GLES2Context*>(ctx);
+   return static_cast<egl_context_t*>(&gl->egl);
+}
+
+#define GLES2_GET_CONTEXT(ctx) GLES2Context * ctx = GLES2Context::get(); \
+                                 /*puts(__FUNCTION__);*/
+#define GLES2_GET_CONST_CONTEXT(ctx) GLES2Context * ctx = GLES2Context::get(); \
+                                       /*puts(__FUNCTION__);*/
diff --git a/opengl/libagl2/src/shader.cpp b/opengl/libagl2/src/shader.cpp
new file mode 100644
index 0000000..076e388
--- /dev/null
+++ b/opengl/libagl2/src/shader.cpp
@@ -0,0 +1,191 @@
+#include "gles2context.h"
+
+//#undef LOGD
+//#define LOGD(...)
+
+static inline GLuint s2n(gl_shader * s)
+{
+   return (GLuint)s ^ 0xaf3c532d;
+}
+
+static inline gl_shader * n2s(GLuint n)
+{
+   return (gl_shader *)(n ^ 0xaf3c532d);
+}
+
+static inline GLuint p2n(gl_shader_program * p)
+{
+   return (GLuint)p ^ 0x04dc18f9;
+}
+
+static inline gl_shader_program * n2p(GLuint n)
+{
+   return (gl_shader_program *)(n ^ 0x04dc18f9);
+}
+
+void glAttachShader(GLuint program, GLuint shader)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->ShaderAttach(ctx->iface, n2p(program), n2s(shader));
+}
+
+void glBindAttribLocation(GLuint program, GLuint index, const GLchar* name)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->ShaderAttributeBind(n2p(program), index, name);
+//   assert(0);
+}
+
+GLuint glCreateShader(GLenum type)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   return s2n(ctx->iface->ShaderCreate(ctx->iface, type));
+}
+
+GLuint glCreateProgram(void)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   return  p2n(ctx->iface->ShaderProgramCreate(ctx->iface));
+}
+
+void glCompileShader(GLuint shader)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->ShaderCompile(ctx->iface, n2s(shader), NULL, NULL);
+}
+
+void glDeleteProgram(GLuint program)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->ShaderProgramDelete(ctx->iface, n2p(program));
+}
+
+void glDeleteShader(GLuint shader)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->ShaderDelete(ctx->iface, n2s(shader));
+}
+
+void glDetachShader(GLuint program, GLuint shader)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->ShaderDetach(ctx->iface, n2p(program), n2s(shader));
+}
+
+GLint glGetAttribLocation(GLuint program, const GLchar* name)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   GLint location = ctx->iface->ShaderAttributeLocation(n2p(program), name);
+//   LOGD("\n*\n*\n* agl2: glGetAttribLocation program=%u name=%s location=%d \n*\n*",
+//        program, name, location);
+   return location;
+}
+
+void glGetProgramiv(GLuint program, GLenum pname, GLint* params)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->ShaderProgramGetiv(n2p(program), pname, params);
+   LOGD("agl2: glGetProgramiv 0x%.4X=%d \n", pname, *params);
+}
+
+void glGetProgramInfoLog(GLuint program, GLsizei bufsize, GLsizei* length, GLchar* infolog)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->ShaderProgramGetInfoLog(n2p(program), bufsize, length, infolog);
+}
+
+void glGetShaderiv(GLuint shader, GLenum pname, GLint* params)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->ShaderGetiv(n2s(shader), pname, params);
+   LOGD("agl2: glGetShaderiv 0x%.4X=%d \n", pname, *params);
+}
+
+void glGetShaderInfoLog(GLuint shader, GLsizei bufsize, GLsizei* length, GLchar* infolog)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->ShaderGetInfoLog(n2s(shader), bufsize, length, infolog);
+}
+
+int glGetUniformLocation(GLuint program, const GLchar* name)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   return ctx->iface->ShaderUniformLocation(n2p(program), name);
+}
+
+void glLinkProgram(GLuint program)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   GLboolean linked = ctx->iface->ShaderProgramLink(n2p(program), NULL);
+   assert(linked);
+}
+
+void glShaderSource(GLuint shader, GLsizei count, const GLchar** string, const GLint* length)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->ShaderSource(n2s(shader), count, string, length);
+}
+
+void glUniform1f(GLint location, GLfloat x)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   int sampler = ctx->iface->ShaderUniform(ctx->rasterizer.CurrentProgram, location, 1, &x, GL_FLOAT);
+   assert(0 > sampler); // should be assigning to sampler
+}
+
+void glUniform1i(GLint location, GLint x)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   const float params[1] = {x};
+   int sampler = ctx->iface->ShaderUniform(ctx->rasterizer.CurrentProgram, location, 1, params, GL_INT);
+   if (0 <= sampler) {
+//      LOGD("\n*\n* agl2: glUniform1i updated sampler=%d tmu=%d location=%d\n*", sampler, x, location);
+      assert(0 <= x && GGL_MAXCOMBINEDTEXTUREIMAGEUNITS > x);
+//      LOGD("tmu%u: format=0x%.2X w=%u h=%u levels=%p", x, ctx->tex.tmus[x]->format, 
+//         ctx->tex.tmus[x]->width, ctx->tex.tmus[x]->height, ctx->tex.tmus[x]->format);
+      ctx->tex.sampler2tmu[sampler] = x;
+      ctx->tex.UpdateSampler(ctx->iface, x);
+   }
+}
+
+void glUniform2f(GLint location, GLfloat x, GLfloat y)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   const float params[4] = {x, y};
+   ctx->iface->ShaderUniform(ctx->rasterizer.CurrentProgram, location, 1, params, GL_FLOAT_VEC2);
+}
+
+void glUniform4f(GLint location, GLfloat x, GLfloat y, GLfloat z, GLfloat w)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   const float params[4] = {x, y, z, w};
+//   LOGD("agl2: glUniform4f location=%d %f,%f,%f,%f", location, x, y, z, w);
+   ctx->iface->ShaderUniform(ctx->rasterizer.CurrentProgram, location, 1, params, GL_FLOAT_VEC4);
+}
+
+void glUniformMatrix4fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+//   const gl_shader_program * program = ctx->rasterizer.CurrentProgram;
+//   if (strstr(program->Shaders[MESA_SHADER_FRAGMENT]->Source, ").a;")) {
+//   LOGD("agl2: glUniformMatrix4fv location=%d count=%d transpose=%d", location, count, transpose);
+//   for (unsigned i = 0; i < 4; i++)
+//      LOGD("agl2: glUniformMatrix4fv %.2f \t %.2f \t %.2f \t %.2f", value[i * 4 + 0],
+//           value[i * 4 + 1], value[i * 4 + 2], value[i * 4 + 3]);
+//   }
+   ctx->iface->ShaderUniformMatrix(ctx->rasterizer.CurrentProgram, 4, 4, location, count, transpose, value);
+//   while (true)
+//      ;
+//   assert(0);
+}
+
+void glUseProgram(GLuint program)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+//   LOGD("\n*\n*\n* agl2: glUseProgram %d \n*\n*\n*", program);
+   ctx->iface->ShaderUse(ctx->iface, n2p(program));
+   ctx->iface->ShaderUniformGetSamplers(n2p(program), ctx->tex.sampler2tmu);
+   for (unsigned i = 0; i < GGL_MAXCOMBINEDTEXTUREIMAGEUNITS; i++)
+      if (0 <= ctx->tex.sampler2tmu[i])
+         ctx->iface->SetSampler(ctx->iface, i, ctx->tex.tmus[ctx->tex.sampler2tmu[i]]);
+}
diff --git a/opengl/libagl2/src/state.cpp b/opengl/libagl2/src/state.cpp
new file mode 100644
index 0000000..22e73fa
--- /dev/null
+++ b/opengl/libagl2/src/state.cpp
@@ -0,0 +1,129 @@
+#include "gles2context.h"
+
+GLES2Context::GLES2Context()
+{
+   memset(this, 0, sizeof *this);
+
+   assert((void *)&rasterizer == &rasterizer.interface);
+   InitializeGGLState(&rasterizer.interface);
+   iface = &rasterizer.interface;
+   printf("gl->rasterizer.PickScanLine(%p) = %p \n", &rasterizer.PickScanLine, rasterizer.PickScanLine);
+   assert(rasterizer.PickRaster);
+   assert(rasterizer.PickScanLine);
+
+   InitializeTextures();
+   InitializeVertices();
+}
+
+GLES2Context::~GLES2Context()
+{
+   UninitializeTextures();
+   UninitializeVertices();
+   UninitializeGGLState(&rasterizer.interface);
+}
+
+void glBlendColor(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->BlendColor(ctx->iface, red, green, blue, alpha);
+}
+
+void glBlendEquation( GLenum mode )
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->BlendEquationSeparate(ctx->iface, mode, mode);
+}
+
+void glBlendEquationSeparate(GLenum modeRGB, GLenum modeAlpha)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->BlendEquationSeparate(ctx->iface, modeRGB, modeAlpha);
+}
+
+void glBlendFunc(GLenum sfactor, GLenum dfactor)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->BlendFuncSeparate(ctx->iface, sfactor, dfactor, sfactor, dfactor);
+}
+
+void glBlendFuncSeparate(GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->BlendFuncSeparate(ctx->iface, srcRGB, dstRGB, srcAlpha, dstAlpha);
+}
+
+void glClear(GLbitfield mask)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->Clear(ctx->iface, mask);
+}
+
+void glClearColor(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->ClearColor(ctx->iface, red, green, blue, alpha);
+}
+
+void glClearDepthf(GLclampf depth)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->ClearDepthf(ctx->iface, depth);
+}
+
+void glClearStencil(GLint s)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->ClearStencil(ctx->iface, s);
+}
+
+void glCullFace(GLenum mode)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->CullFace(ctx->iface, mode);
+}
+
+void glDisable(GLenum cap)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->EnableDisable(ctx->iface, cap, false);
+}
+
+void glEnable(GLenum cap)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->EnableDisable(ctx->iface, cap, true);
+}
+
+void glFinish(void)
+{
+   // do nothing
+}
+
+void glFrontFace(GLenum mode)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->iface->FrontFace(ctx->iface, mode);
+}
+
+void glFlush(void)
+{
+   // do nothing
+}
+
+void glHint(GLenum target, GLenum mode)
+{
+   // do nothing
+}
+
+void glScissor(GLint x, GLint y, GLsizei width, GLsizei height)
+{
+//   LOGD("agl2: glScissor not implemented x=%d y=%d width=%d height=%d", x, y, width, height);
+   //CALL_GL_API(glScissor, x, y, width, height);
+}
+
+void glViewport(GLint x, GLint y, GLsizei width, GLsizei height)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+//   LOGD("agl2: glViewport x=%d y=%d width=%d height=%d", x, y, width, height);
+   ctx->iface->Viewport(ctx->iface, x, y, width, height);
+}
diff --git a/opengl/libagl2/src/texture.cpp b/opengl/libagl2/src/texture.cpp
new file mode 100644
index 0000000..4de1f16
--- /dev/null
+++ b/opengl/libagl2/src/texture.cpp
@@ -0,0 +1,534 @@
+#include "gles2context.h"
+
+//#undef LOGD
+//#define LOGD(...) 
+
+#define API_ENTRY
+#define CALL_GL_API(NAME,...) LOGD("?"#NAME); assert(0);
+#define CALL_GL_API_RETURN(NAME,...) LOGD("?"#NAME); assert(0); return 0;
+
+static inline GGLTexture * AllocTexture()
+{
+   GGLTexture * tex = (GGLTexture *)calloc(1, sizeof(GGLTexture));
+   tex->minFilter = GGLTexture::GGL_LINEAR; // should be NEAREST_ MIPMAP_LINEAR
+   tex->magFilter = GGLTexture::GGL_LINEAR;
+   return tex;
+}
+
+void GLES2Context::InitializeTextures()
+{
+   tex.textures = std::map<GLuint, GGLTexture *>(); // the entire struct has been zeroed in constructor
+   tex.tex2D = AllocTexture();
+   tex.textures[GL_TEXTURE_2D] = tex.tex2D;
+   tex.texCube = AllocTexture();
+   tex.textures[GL_TEXTURE_CUBE_MAP] = tex.texCube;
+   for (unsigned i = 0; i < GGL_MAXCOMBINEDTEXTUREIMAGEUNITS; i++) {
+      tex.tmus[i] = NULL;
+      tex.sampler2tmu[i] = NULL;
+   }
+
+   tex.active = 0;
+
+   tex.free = max(GL_TEXTURE_2D, GL_TEXTURE_CUBE_MAP) + 1;
+
+   tex.tex2D->format = GGL_PIXEL_FORMAT_RGBA_8888;
+   tex.tex2D->type = GL_TEXTURE_2D;
+   tex.tex2D->levelCount = 1;
+   tex.tex2D->wrapS = tex.tex2D->wrapT = GGLTexture::GGL_REPEAT;
+   tex.tex2D->minFilter = tex.tex2D->magFilter = GGLTexture::GGL_NEAREST;
+   tex.tex2D->width = tex.tex2D->height = 1;
+   tex.tex2D->levels = malloc(4);
+   *(unsigned *)tex.tex2D->levels = 0xff000000;
+
+
+   tex.texCube->format = GGL_PIXEL_FORMAT_RGBA_8888;
+   tex.texCube->type = GL_TEXTURE_CUBE_MAP;
+   tex.texCube->levelCount = 1;
+   tex.texCube->wrapS = tex.texCube->wrapT = GGLTexture::GGL_REPEAT;
+   tex.texCube->minFilter = tex.texCube->magFilter = GGLTexture::GGL_NEAREST;
+   tex.texCube->width = tex.texCube->height = 1;
+   tex.texCube->levels = malloc(4 * 6);
+   static unsigned texels [6] = {0xff0000ff, 0xff00ff00, 0xffff0000,
+                                 0xff00ffff, 0xffffff00, 0xffff00ff
+                                };
+   memcpy(tex.texCube->levels, texels, sizeof texels);
+
+   //texture.levelCount = GenerateMipmaps(texture.levels, texture.width, texture.height);
+
+   //    static unsigned texels [6] = {0xff0000ff, 0xff00ff00, 0xffff0000,
+   //    0xff00ffff, 0xffffff00, 0xffff00ff};
+   //    memcpy(texture.levels[0], texels, sizeof texels);
+   //    texture.format = GGL_PIXEL_FORMAT_RGBA_8888;
+   //    texture.width = texture.height = 1;
+   //texture.height /= 6;
+   //texture.type = GL_TEXTURE_CUBE_MAP;
+   
+   tex.unpack = 4;
+}
+
+void GLES2Context::TextureState::UpdateSampler(GGLInterface * iface, unsigned tmu)
+{
+   for (unsigned i = 0; i < GGL_MAXCOMBINEDTEXTUREIMAGEUNITS; i++)
+      if (tmu == sampler2tmu[i])
+         iface->SetSampler(iface, i, tmus[tmu]);
+}
+
+void GLES2Context::UninitializeTextures()
+{
+   for (std::map<GLuint, GGLTexture *>::iterator it = tex.textures.begin(); it != tex.textures.end(); it++) {
+      if (!it->second)
+         continue;
+      free(it->second->levels);
+      free(it->second);
+   }
+}
+
+static inline void GetFormatAndBytesPerPixel(const GLenum format, unsigned * bytesPerPixel,
+      GGLPixelFormat * texFormat)
+{
+   switch (format) {
+   case GL_ALPHA:
+      *texFormat = GGL_PIXEL_FORMAT_A_8;
+      *bytesPerPixel = 1;
+      break;
+   case GL_LUMINANCE:
+      *texFormat = GGL_PIXEL_FORMAT_L_8;
+      *bytesPerPixel = 1;
+      break;
+   case GL_LUMINANCE_ALPHA:
+      *texFormat = GGL_PIXEL_FORMAT_LA_88;
+      *bytesPerPixel = 2;
+      break;
+   case GL_RGB:
+      *texFormat = GGL_PIXEL_FORMAT_RGB_888;
+      *bytesPerPixel = 3;
+      break;
+   case GL_RGBA:
+      *texFormat = GGL_PIXEL_FORMAT_RGBA_8888;
+      *bytesPerPixel = 4;
+      break;
+
+      // internal formats to avoid conversion
+   case GL_UNSIGNED_SHORT_5_6_5:
+      *texFormat = GGL_PIXEL_FORMAT_RGB_565;
+      *bytesPerPixel = 2;
+      break;
+
+   default:
+      assert(0);
+      return;
+   }
+}
+
+static inline void CopyTexture(char * dst, const char * src, const unsigned bytesPerPixel,
+                               const unsigned sx, const unsigned sy,  const unsigned sw,
+                               const unsigned dx, const unsigned dy, const unsigned dw,
+                               const unsigned w, const unsigned h)
+{
+   const unsigned bpp = bytesPerPixel;
+   if (dw == sw && dw == w && sx == 0 && dx == 0)
+      memcpy(dst + dy * dw * bpp, src + sy * sw * bpp, w * h * bpp);
+   else
+      for (unsigned y = 0; y < h; y++)
+         memcpy(dst + ((dy + y) * dw + dx) * bpp, src + ((sy + y) * sw + sx) * bpp, w * bpp); 
+}
+
+void glActiveTexture(GLenum texture)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   unsigned index = texture - GL_TEXTURE0;
+   assert(NELEM(ctx->tex.tmus) > index);
+//   LOGD("agl2: glActiveTexture %u", index);
+   ctx->tex.active = index;
+}
+
+void glBindTexture(GLenum target, GLuint texture)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+//   LOGD("agl2: glBindTexture target=0x%.4X texture=%u active=%u", target, texture, ctx->tex.active);
+   std::map<GLuint, GGLTexture *>::iterator it = ctx->tex.textures.find(texture);
+   GGLTexture * tex = NULL;
+   if (it != ctx->tex.textures.end()) {
+      tex = it->second;
+      if (!tex) {
+         tex = AllocTexture();
+         tex->type = target;
+         it->second = tex;
+//         LOGD("agl2: glBindTexture allocTexture");
+      }
+//      else
+//         LOGD("agl2: glBindTexture bind existing texture");
+      assert(target == tex->type);
+   } else if (0 == texture) {
+      if (GL_TEXTURE_2D == target)
+      {
+         tex = ctx->tex.tex2D;
+//         LOGD("agl2: glBindTexture bind default tex2D");
+      }
+      else if (GL_TEXTURE_CUBE_MAP == target)
+      {
+         tex = ctx->tex.texCube;
+//         LOGD("agl2: glBindTexture bind default texCube");
+      }
+      else
+         assert(0);
+   } else {
+      if (texture <= ctx->tex.free)
+         ctx->tex.free = texture + 1;
+      tex = AllocTexture();
+      tex->type = target;
+      ctx->tex.textures[texture] = tex;
+//      LOGD("agl2: glBindTexture new texture=%u", texture);
+   }
+   ctx->tex.tmus[ctx->tex.active] = tex;
+//   LOGD("agl2: glBindTexture format=0x%.2X w=%u h=%u levels=%p", tex->format,
+//      tex->width, tex->height, tex->levels);
+   ctx->tex.UpdateSampler(ctx->iface, ctx->tex.active);
+}
+
+void API_ENTRY(glCompressedTexImage2D)(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const GLvoid* data)
+{
+   CALL_GL_API(glCompressedTexImage2D, target, level, internalformat, width, height, border, imageSize, data);
+}
+
+void API_ENTRY(glCompressedTexSubImage2D)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const GLvoid* data)
+{
+   CALL_GL_API(glCompressedTexSubImage2D, target, level, xoffset, yoffset, width, height, format, imageSize, data);
+}
+
+void glCopyTexImage2D(GLenum target, GLint level, GLenum internalformat,
+                      GLint x, GLint y, GLsizei width, GLsizei height, GLint border)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+//   LOGD("agl2: glCopyTexImage2D target=0x%.4X internalformat=0x%.4X", target, internalformat);
+//   LOGD("x=%d y=%d width=%d height=%d border=%d level=%d ", x, y, width, height, border, level);
+   assert(0 == border);
+   assert(0 == level);
+   unsigned bytesPerPixel = 0;
+   GGLPixelFormat texFormat = GGL_PIXEL_FORMAT_UNKNOWN;
+   GetFormatAndBytesPerPixel(internalformat, &bytesPerPixel, &texFormat);
+
+   assert(texFormat == ctx->rasterizer.frameSurface.format);
+//   LOGD("texFormat=0x%.2X bytesPerPixel=%d \n", texFormat, bytesPerPixel);
+   unsigned offset = 0, size = width * height * bytesPerPixel, totalSize = size;
+
+   assert(ctx->tex.tmus[ctx->tex.active]);
+   assert(y + height <= ctx->rasterizer.frameSurface.height);
+   assert(x + width <= ctx->rasterizer.frameSurface.width);
+   GGLTexture & tex = *ctx->tex.tmus[ctx->tex.active];
+   tex.width = width;
+   tex.height = height;
+   tex.levelCount = 1;
+   tex.format = texFormat;
+   switch (target) {
+   case GL_TEXTURE_2D:
+      tex.levels = realloc(tex.levels, totalSize);
+      CopyTexture((char *)tex.levels, (const char *)ctx->rasterizer.frameSurface.data, bytesPerPixel,
+                  x, y, ctx->rasterizer.frameSurface.width, 0, 0, width, width, height);
+      break;
+   default:
+      assert(0);
+      return;
+   }
+   ctx->tex.UpdateSampler(ctx->iface, ctx->tex.active);
+}
+
+void glCopyTexSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height)
+{
+   // x, y are src offset
+   // xoffset and yoffset are dst offset
+   GLES2_GET_CONST_CONTEXT(ctx);
+//   LOGD("agl2: glCopyTexSubImage2D target=0x%.4X level=%d", target, level);
+//   LOGD("xoffset=%d yoffset=%d x=%d y=%d width=%d height=%d", xoffset, yoffset, x, y, width, height);
+   assert(0 == level);
+
+   unsigned bytesPerPixel = 4;
+   unsigned offset = 0, size = width * height * bytesPerPixel, totalSize = size;
+
+   assert(ctx->tex.tmus[ctx->tex.active]);
+   GGLTexture & tex = *ctx->tex.tmus[ctx->tex.active];
+
+   assert(tex.format == ctx->rasterizer.frameSurface.format);
+   assert(GGL_PIXEL_FORMAT_RGBA_8888 == tex.format);
+
+   const unsigned srcWidth = ctx->rasterizer.frameSurface.width;
+   const unsigned srcHeight = ctx->rasterizer.frameSurface.height;
+
+   assert(x >= 0 && y >= 0);
+   assert(xoffset >= 0 && yoffset >= 0);
+   assert(x + width <= srcWidth);
+   assert(y + height <= srcHeight);
+   assert(xoffset + width <= tex.width);
+   assert(yoffset + height <= tex.height);
+
+   switch (target) {
+   case GL_TEXTURE_2D:
+      CopyTexture((char *)tex.levels, (const char *)ctx->rasterizer.frameSurface.data, bytesPerPixel,
+                  x, y, srcWidth, xoffset, yoffset, tex.width, width, height);
+      break;
+   default:
+      assert(0);
+      return;
+   }
+   ctx->tex.UpdateSampler(ctx->iface, ctx->tex.active);
+}
+
+void glDeleteTextures(GLsizei n, const GLuint* textures)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   for (unsigned i = 0; i < n; i++) {
+      std::map<GLuint, GGLTexture *>::iterator it = ctx->tex.textures.find(textures[i]);
+      if (it == ctx->tex.textures.end())
+         continue;
+      ctx->tex.free = min(ctx->tex.free, textures[i]);
+      for (unsigned i = 0; i <  GGL_MAXCOMBINEDTEXTUREIMAGEUNITS; i++)
+         if (ctx->tex.tmus[i] == it->second) {
+            if (GL_TEXTURE_2D == it->second->type)
+               ctx->tex.tmus[i] = ctx->tex.tex2D;
+            else if (GL_TEXTURE_CUBE_MAP == it->second->type)
+               ctx->tex.tmus[i] = ctx->tex.texCube;
+            else
+               assert(0);
+            ctx->tex.UpdateSampler(ctx->iface, i);
+         }
+      if (it->second) {
+         free(it->second->levels);
+         free(it->second);
+      }
+      ctx->tex.textures.erase(it);
+   }
+}
+
+void glGenTextures(GLsizei n, GLuint* textures)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   for (unsigned i = 0; i < n; i++) {
+      textures[i] = 0;
+      for (ctx->tex.free; ctx->tex.free < 0xffffffffu; ctx->tex.free++)
+         if (ctx->tex.textures.find(ctx->tex.free) == ctx->tex.textures.end()) {
+            ctx->tex.textures[ctx->tex.free] = NULL;
+            textures[i] = ctx->tex.free;
+            ctx->tex.free++;
+            break;
+         }
+      assert(textures[i]);
+   }
+}
+
+void API_ENTRY(glGetTexParameterfv)(GLenum target, GLenum pname, GLfloat* params)
+{
+   CALL_GL_API(glGetTexParameterfv, target, pname, params);
+}
+void API_ENTRY(glGetTexParameteriv)(GLenum target, GLenum pname, GLint* params)
+{
+   CALL_GL_API(glGetTexParameteriv, target, pname, params);
+}
+
+GLboolean glIsTexture(GLuint texture)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   if (ctx->tex.textures.find(texture) == ctx->tex.textures.end())
+      return GL_FALSE;
+   else
+      return GL_TRUE;
+}
+
+void glPixelStorei(GLenum pname, GLint param)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   assert(GL_UNPACK_ALIGNMENT == pname);
+   assert(1 == param || 2 == param || 4 == param || 8 == param);
+//   LOGD("\n*\n* agl2: glPixelStorei not implemented pname=0x%.4X param=%d \n*", pname, param);
+   ctx->tex.unpack = param;
+//   CALL_GL_API(glPixelStorei, pname, param);
+}
+void glTexImage2D(GLenum target, GLint level, GLint internalformat, GLsizei width,
+                  GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid* pixels)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+//   LOGD("agl2: glTexImage2D internalformat=0x%.4X format=0x%.4X type=0x%.4X \n", internalformat, format, type);
+//   LOGD("width=%d height=%d border=%d level=%d pixels=%p \n", width, height, border, level, pixels);
+   switch (type) {
+   case GL_UNSIGNED_BYTE:
+      break;
+   case GL_UNSIGNED_SHORT_5_6_5:
+      internalformat = format = GL_UNSIGNED_SHORT_5_6_5;
+      assert(4 == ctx->tex.unpack);
+      break;
+   default:
+      assert(0);
+   }
+   assert(internalformat == format);
+   assert(0 == border);
+   if (0 != level) {
+      LOGD("agl2: glTexImage2D level=%d", level);
+      return;
+   }
+   unsigned bytesPerPixel = 0;
+   GGLPixelFormat texFormat = GGL_PIXEL_FORMAT_UNKNOWN;
+   GetFormatAndBytesPerPixel(format, &bytesPerPixel, &texFormat);
+
+   assert(texFormat && bytesPerPixel);
+//   LOGD("texFormat=0x%.2X bytesPerPixel=%d active=%u", texFormat, bytesPerPixel, ctx->tex.active);
+   unsigned offset = 0, size = width * height * bytesPerPixel, totalSize = size;
+
+   assert(ctx->tex.tmus[ctx->tex.active]);
+
+   GGLTexture & tex = *ctx->tex.tmus[ctx->tex.active];
+   tex.width = width;
+   tex.height = height;
+   tex.levelCount = 1;
+   tex.format = texFormat;
+
+   switch (target) {
+   case GL_TEXTURE_2D:
+      assert(GL_TEXTURE_2D == ctx->tex.tmus[ctx->tex.active]->type);
+      offset = 0;
+      break;
+      break;
+   case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
+   case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
+   case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
+   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
+   case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
+   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
+      assert(GL_TEXTURE_CUBE_MAP == ctx->tex.tmus[ctx->tex.active]->type);
+      assert(width == height);
+      offset = (target - GL_TEXTURE_CUBE_MAP_POSITIVE_X) * size;
+      totalSize = 6 * size;
+      break;
+   default:
+      assert(0);
+      return;
+   }
+
+   tex.levels = realloc(tex.levels, totalSize);
+   if (pixels)
+      CopyTexture((char *)tex.levels, (const char *)pixels, bytesPerPixel, 0, 0, width, 0, 0, width, width, height);
+   ctx->tex.UpdateSampler(ctx->iface, ctx->tex.active);
+}
+
+void glTexParameterf(GLenum target, GLenum pname, GLfloat param)
+{
+//   LOGD("agl2: glTexParameterf target=0x%.4X pname=0x%.4X param=%f", target, pname, param);
+   glTexParameteri(target, pname, param);
+}
+void API_ENTRY(glTexParameterfv)(GLenum target, GLenum pname, const GLfloat* params)
+{
+   CALL_GL_API(glTexParameterfv, target, pname, params);
+}
+void glTexParameteri(GLenum target, GLenum pname, GLint param)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+//   LOGD("alg2: glTexParameteri target=0x%.0X pname=0x%.4X param=0x%.4X",
+//        target, pname, param);
+   assert(ctx->tex.tmus[ctx->tex.active]);
+   assert(target == ctx->tex.tmus[ctx->tex.active]->type);
+   GGLTexture & tex = *ctx->tex.tmus[ctx->tex.active];
+   switch (pname) {
+   case GL_TEXTURE_WRAP_S:
+   case GL_TEXTURE_WRAP_T:
+      GGLTexture::GGLTextureWrap wrap;
+      switch (param) {
+      case GL_REPEAT:
+         wrap = GGLTexture::GGL_REPEAT;
+         break;
+      case GL_CLAMP_TO_EDGE:
+         wrap = GGLTexture::GGL_CLAMP_TO_EDGE;
+         break;
+      case GL_MIRRORED_REPEAT:
+         wrap = GGLTexture::GGL_MIRRORED_REPEAT;
+         break;
+      default:
+         assert(0);
+         return;
+      }
+      if (GL_TEXTURE_WRAP_S == pname)
+         tex.wrapS = wrap;
+      else
+         tex.wrapT = wrap;
+      break;
+   case GL_TEXTURE_MIN_FILTER:
+      switch (param) {
+      case GL_NEAREST:
+         tex.minFilter = GGLTexture::GGL_NEAREST;
+         break;
+      case GL_LINEAR:
+         tex.minFilter = GGLTexture::GGL_LINEAR;
+         break;
+      case GL_NEAREST_MIPMAP_NEAREST:
+//         tex.minFilter = GGLTexture::GGL_NEAREST_MIPMAP_NEAREST;
+         break;
+      case GL_NEAREST_MIPMAP_LINEAR:
+//         tex.minFilter = GGLTexture::GGL_NEAREST_MIPMAP_LINEAR;
+         break;
+      case GL_LINEAR_MIPMAP_NEAREST:
+//         tex.minFilter = GGLTexture::GGL_LINEAR_MIPMAP_NEAREST;
+         break;
+      case GL_LINEAR_MIPMAP_LINEAR:
+//         tex.minFilter = GGLTexture::GGL_LINEAR_MIPMAP_LINEAR;
+         break;
+      default:
+         assert(0);
+         return;
+      }
+      break;
+   case GL_TEXTURE_MAG_FILTER:
+      switch (param) {
+      case GL_NEAREST:
+         tex.minFilter = GGLTexture::GGL_NEAREST;
+         break;
+      case GL_LINEAR:
+         tex.minFilter = GGLTexture::GGL_LINEAR;
+         break;
+      default:
+         assert(0);
+         return;
+      }
+      break;
+   default:
+      assert(0);
+      return;
+   }
+   // implementation restriction
+   if (tex.magFilter != tex.minFilter)
+      tex.magFilter = tex.minFilter = GGLTexture::GGL_LINEAR;
+   ctx->tex.UpdateSampler(ctx->iface, ctx->tex.active);
+}
+void API_ENTRY(glTexParameteriv)(GLenum target, GLenum pname, const GLint* params)
+{
+   CALL_GL_API(glTexParameteriv, target, pname, params);
+}
+void glTexSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid* pixels)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+//   LOGD("agl2: glTexSubImage2D target=0x%.4X level=%d xoffset=%d yoffset=%d width=%d height=%d format=0x%.4X type=0x%.4X pixels=%p",
+//        target, level, xoffset, yoffset, width, height, format, type, pixels);
+   assert(0 == level);
+   assert(target == ctx->tex.tmus[ctx->tex.active]->type);
+   switch (type) {
+   case GL_UNSIGNED_BYTE:
+      break;
+   case GL_UNSIGNED_SHORT_5_6_5:
+      format = GL_UNSIGNED_SHORT_5_6_5;
+      assert(4 == ctx->tex.unpack);
+      break;
+   default:
+      assert(0);
+   }
+   GGLTexture & tex = *ctx->tex.tmus[ctx->tex.active];
+   GGLPixelFormat texFormat = GGL_PIXEL_FORMAT_UNKNOWN;
+   unsigned bytesPerPixel = 0;
+   GetFormatAndBytesPerPixel(format, &bytesPerPixel, &texFormat);
+   assert(texFormat == tex.format);
+   assert(GL_UNSIGNED_BYTE == type);
+   switch (target) {
+   case GL_TEXTURE_2D:
+      CopyTexture((char *)tex.levels, (const char *)pixels, bytesPerPixel, 0, 0, width, xoffset,
+                  yoffset, tex.width, width, height);
+      break;
+   default:
+      assert(0);
+   }
+   ctx->tex.UpdateSampler(ctx->iface, ctx->tex.active);
+}
diff --git a/opengl/libagl2/src/vertex.cpp b/opengl/libagl2/src/vertex.cpp
new file mode 100644
index 0000000..021b82b
--- /dev/null
+++ b/opengl/libagl2/src/vertex.cpp
@@ -0,0 +1,373 @@
+#include "gles2context.h"
+
+//#undef LOGD
+//#define LOGD(...)
+
+void GLES2Context::InitializeVertices()
+{
+   vert.vbos = std::map<GLuint, VBO *>(); // the entire struct has been zeroed in constructor
+   vert.free = 1;
+   vert.vbo = NULL;
+   vert.indices = NULL;
+   for (unsigned i = 0; i < GGL_MAXVERTEXATTRIBS; i++)
+      vert.defaultAttribs[i] = Vector4(0,0,0,1);
+}
+
+void GLES2Context::UninitializeVertices()
+{
+   for (std::map<GLuint, VBO *>::iterator it = vert.vbos.begin(); it != vert.vbos.end(); it++) {
+      if (!it->second)
+         continue;
+      free(it->second->data);
+      free(it->second);
+   }
+}
+
+static inline void FetchElement(const GLES2Context * ctx, const unsigned index,
+                                const unsigned maxAttrib, VertexInput * elem)
+{
+   for (unsigned i = 0; i < maxAttrib; i++) {
+      {
+         unsigned size = 0;
+         if (ctx->vert.attribs[i].enabled) {
+            const char * ptr = (const char *)ctx->vert.attribs[i].ptr;
+            ptr += ctx->vert.attribs[i].stride * index;
+            memcpy(elem->attributes + i, ptr, ctx->vert.attribs[i].size * sizeof(float));
+            size = ctx->vert.attribs[i].size;
+//            LOGD("agl2: FetchElement %d attribs size=%d %.2f,%.2f,%.2f,%.2f", i, size, elem->attributes[i].x,
+//                 elem->attributes[i].y, elem->attributes[i].z, elem->attributes[i].w);
+         } else {
+//            LOGD("agl2: FetchElement %d default %.2f,%.2f,%.2f,%.2f", i, ctx->vert.defaultAttribs[i].x,
+//                 ctx->vert.defaultAttribs[i].y, ctx->vert.defaultAttribs[i].z, ctx->vert.defaultAttribs[i].w);
+         }
+
+         switch (size) {
+         case 0: // fall through
+            elem->attributes[i].x = ctx->vert.defaultAttribs[i].x;
+         case 1: // fall through
+            elem->attributes[i].y = ctx->vert.defaultAttribs[i].y;
+         case 2: // fall through
+            elem->attributes[i].z = ctx->vert.defaultAttribs[i].z;
+         case 3: // fall through
+            elem->attributes[i].w = ctx->vert.defaultAttribs[i].w;
+         case 4:
+            break;
+         default:
+            assert(0);
+            break;
+         }
+//         LOGD("agl2: FetchElement %d size=%d %.2f,%.2f,%.2f,%.2f", i, size, elem->attributes[i].x,
+//              elem->attributes[i].y, elem->attributes[i].z, elem->attributes[i].w);
+      }
+   }
+}
+
+template<typename IndexT> static void DrawElementsTriangles(const GLES2Context * ctx,
+      const unsigned count, const IndexT * indices, const unsigned maxAttrib)
+{
+   VertexInput v[3];
+   if (ctx->vert.indices)
+      indices = (IndexT *)((char *)ctx->vert.indices->data + (long)indices);
+   for (unsigned i = 0; i < count; i += 3) {
+      for (unsigned j = 0; j < 3; j++)
+         FetchElement(ctx, indices[i + j], maxAttrib, v + j);
+      ctx->iface->DrawTriangle(ctx->iface, v, v + 1, v + 2);
+   }
+}
+
+static void DrawArraysTriangles(const GLES2Context * ctx, const unsigned first,
+                                const unsigned count, const unsigned maxAttrib)
+{
+//   LOGD("agl: DrawArraysTriangles=%p", DrawArraysTriangles);
+   VertexInput v[3];
+   for (unsigned i = 2; i < count; i+=3) {
+      // TODO: fix order
+      FetchElement(ctx, first + i - 2, maxAttrib, v + 0);
+      FetchElement(ctx, first + i - 1, maxAttrib, v + 1);
+      FetchElement(ctx, first + i - 0, maxAttrib, v + 2);
+      ctx->iface->DrawTriangle(ctx->iface, v + 0, v + 1, v + 2);
+   }
+//   LOGD("agl: DrawArraysTriangles end");
+}
+
+template<typename IndexT> static void DrawElementsTriangleStrip(const GLES2Context * ctx,
+      const unsigned count, const IndexT * indices, const unsigned maxAttrib)
+{
+   VertexInput v[3];
+   if (ctx->vert.indices)
+      indices = (IndexT *)((char *)ctx->vert.indices->data + (long)indices);
+      
+//   LOGD("agl2: DrawElementsTriangleStrip");
+//   for (unsigned i = 0; i < count; i++)
+//      LOGD("indices[%d] = %d", i, indices[i]);
+
+   FetchElement(ctx, indices[0], maxAttrib, v + 0);
+   FetchElement(ctx, indices[1], maxAttrib, v + 1);
+   for (unsigned i = 2; i < count; i ++) {
+      FetchElement(ctx, indices[i], maxAttrib, v + i % 3);
+      ctx->iface->DrawTriangle(ctx->iface, v + (i - 2) % 3, v + (i - 1) % 3 , v + (i + 0) % 3);
+   }
+
+//   for (unsigned i = 2; i < count; i++) {
+//      FetchElement(ctx, indices[i - 2], maxAttrib, v + 0);
+//      FetchElement(ctx, indices[i - 1], maxAttrib, v + 1);
+//      FetchElement(ctx, indices[i - 0], maxAttrib, v + 2);
+//      ctx->iface->DrawTriangle(ctx->iface, v + 0, v + 1, v + 2);
+//   }
+}
+
+static void DrawArraysTriangleStrip(const GLES2Context * ctx, const unsigned first,
+                                    const unsigned count, const unsigned maxAttrib)
+{
+   VertexInput v[3];
+   FetchElement(ctx, first, maxAttrib, v + 0);
+   FetchElement(ctx, first + 1, maxAttrib, v + 1);
+   for (unsigned i = 2; i < count; i++) {
+      // TODO: fix order
+      FetchElement(ctx, first + i, maxAttrib, v + i % 3);
+      ctx->iface->DrawTriangle(ctx->iface, v + (i - 2) % 3, v + (i - 1) % 3 , v + (i + 0) % 3);
+   }
+}
+
+void glBindBuffer(GLenum target, GLuint buffer)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   VBO * vbo = NULL;
+   if (0 != buffer) {
+      std::map<GLuint, VBO *>::iterator it = ctx->vert.vbos.find(buffer);
+      if (it != ctx->vert.vbos.end()) {
+         vbo = it->second;
+         if (!vbo)
+            vbo = (VBO *)calloc(1, sizeof(VBO));
+         it->second = vbo;
+      } else
+         assert(0);
+   }
+   if (GL_ARRAY_BUFFER == target)
+      ctx->vert.vbo = vbo;
+   else if (GL_ELEMENT_ARRAY_BUFFER == target)
+      ctx->vert.indices = vbo;
+   else
+      assert(0);
+   assert(vbo || buffer == 0);
+//   LOGD("\n*\n glBindBuffer 0x%.4X=%d ", target, buffer);
+}
+
+void glBufferData(GLenum target, GLsizeiptr size, const GLvoid* data, GLenum usage)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   if (GL_ARRAY_BUFFER == target) {
+      assert(ctx->vert.vbo);
+      ctx->vert.vbo->data = realloc(ctx->vert.vbo->data, size);
+      ctx->vert.vbo->size = size;
+      ctx->vert.vbo->usage = usage;
+      if (data)
+         memcpy(ctx->vert.vbo->data, data, size);
+   } else if (GL_ELEMENT_ARRAY_BUFFER == target) {
+      assert(ctx->vert.indices);
+      ctx->vert.indices->data = realloc(ctx->vert.indices->data, size);
+      ctx->vert.indices->size = size;
+      ctx->vert.indices->usage = usage;
+      if (data)
+         memcpy(ctx->vert.indices->data, data, size);
+   } else
+      assert(0);
+//   LOGD("\n*\n glBufferData target=0x%.4X size=%u data=%p usage=0x%.4X \n",
+//        target, size, data, usage);
+}
+
+void glBufferSubData(GLenum target, GLintptr offset, GLsizeiptr size, const GLvoid* data)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   if (GL_ARRAY_BUFFER == target)
+   {
+      assert(ctx->vert.vbo);
+      assert(0 <= offset);
+      assert(0 <= size);
+      assert(offset + size <= ctx->vert.vbo->size);
+      memcpy((char *)ctx->vert.vbo->data + offset, data, size);
+   }
+   else
+      assert(0);
+}
+
+void glDeleteBuffers(GLsizei n, const GLuint* buffers)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   for (unsigned i = 0; i < n; i++) {
+      std::map<GLuint, VBO*>::iterator it = ctx->vert.vbos.find(buffers[i]);
+      if (it == ctx->vert.vbos.end())
+         continue;
+      ctx->vert.free = min(ctx->vert.free, buffers[i]);
+      if (it->second == ctx->vert.vbo)
+         ctx->vert.vbo = NULL;
+      else if (it->second == ctx->vert.indices)
+         ctx->vert.indices = NULL;
+      if (it->second) {
+         free(it->second->data);
+         free(it->second);
+      }
+   }
+}
+
+void glDisableVertexAttribArray(GLuint index)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   assert(GGL_MAXVERTEXATTRIBS > index);
+   ctx->vert.attribs[index].enabled = false;
+}
+
+void glDrawArrays(GLenum mode, GLint first, GLsizei count)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+//   LOGD("agl2: glDrawArrays=%p", glDrawArrays);
+   assert(ctx->rasterizer.CurrentProgram);
+   assert(0 <= first);
+   int maxAttrib = -1;
+   ctx->iface->ShaderProgramGetiv(ctx->rasterizer.CurrentProgram, GL_ACTIVE_ATTRIBUTES, &maxAttrib);
+   assert(0 <= maxAttrib && GGL_MAXVERTEXATTRIBS >= maxAttrib);
+   switch (mode) {
+   case GL_TRIANGLE_STRIP:
+      DrawArraysTriangleStrip(ctx, first, count, maxAttrib);
+      break;
+   case GL_TRIANGLES:
+      DrawArraysTriangles(ctx, first, count, maxAttrib);
+      break;
+   default:
+      LOGE("agl2: glDrawArrays unsupported mode: 0x%.4X \n", mode);
+      assert(0);
+      break;
+   }
+//   LOGD("agl2: glDrawArrays end");
+}
+
+void glDrawElements(GLenum mode, GLsizei count, GLenum type, const GLvoid* indices)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+//   LOGD("agl2: glDrawElements=%p mode=0x%.4X count=%d type=0x%.4X indices=%p",
+//        glDrawElements, mode, count, type, indices);
+   if (!ctx->rasterizer.CurrentProgram)
+      return;
+
+   int maxAttrib = -1;
+   ctx->iface->ShaderProgramGetiv(ctx->rasterizer.CurrentProgram, GL_ACTIVE_ATTRIBUTES, &maxAttrib);
+   assert(0 <= maxAttrib && GGL_MAXVERTEXATTRIBS >= maxAttrib);
+//   LOGD("agl2: glDrawElements mode=0x%.4X type=0x%.4X count=%d program=%p indices=%p \n",
+//        mode, type, count, ctx->rasterizer.CurrentProgram, indices);
+   switch (mode) {
+   case GL_TRIANGLES:
+      if (GL_UNSIGNED_SHORT == type)
+         DrawElementsTriangles<unsigned short>(ctx, count, (unsigned short *)indices, maxAttrib);
+      else
+         assert(0);
+      break;
+   case GL_TRIANGLE_STRIP:
+      if (GL_UNSIGNED_SHORT == type)
+         DrawElementsTriangleStrip<unsigned short>(ctx, count, (unsigned short *)indices, maxAttrib);
+      else
+         assert(0);
+      break;
+   default:
+      assert(0);
+   }
+//   LOGD("agl2: glDrawElements end");
+}
+
+void glEnableVertexAttribArray(GLuint index)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   ctx->vert.attribs[index].enabled = true;
+//   LOGD("agl2: glEnableVertexAttribArray %d \n", index);
+}
+
+void glGenBuffers(GLsizei n, GLuint* buffers)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   for (unsigned i = 0; i < n; i++) {
+      buffers[i] = 0;
+      for (ctx->vert.free; ctx->vert.free < 0xffffffffu; ctx->vert.free++) {
+         if (ctx->vert.vbos.find(ctx->vert.free) == ctx->vert.vbos.end()) {
+            ctx->vert.vbos[ctx->vert.free] = NULL;
+            buffers[i] = ctx->vert.free;
+//            LOGD("glGenBuffers %d \n", buffers[i]);
+            ctx->vert.free++;
+            break;
+         }
+      }
+      assert(buffers[i]);
+   }
+}
+
+void glVertexAttribPointer(GLuint index, GLint size, GLenum type, GLboolean normalized,
+                           GLsizei stride, const GLvoid* ptr)
+{
+   GLES2_GET_CONST_CONTEXT(ctx);
+   assert(GL_FLOAT == type);
+   assert(0 < size && 4 >= size);
+   ctx->vert.attribs[index].size = size;
+   ctx->vert.attribs[index].type = type;
+   ctx->vert.attribs[index].normalized = normalized;
+   if (0 == stride)
+      ctx->vert.attribs[index].stride = size * sizeof(float);
+   else if (stride > 0)
+      ctx->vert.attribs[index].stride = stride;
+   else
+      assert(0);
+//   LOGD("\n*\n*\n* agl2: glVertexAttribPointer program=%u index=%d size=%d stride=%d ptr=%p \n*\n*",
+//        unsigned(ctx->rasterizer.CurrentProgram) ^ 0x04dc18f9, index, size, stride, ptr);
+   if (ctx->vert.vbo)
+      ctx->vert.attribs[index].ptr = (char *)ctx->vert.vbo->data + (long)ptr;
+   else
+      ctx->vert.attribs[index].ptr = ptr;
+//   const float * attrib = (const float *)ctx->vert.attribs[index].ptr;
+//   for (unsigned i = 0; i < 3; i++)
+//      if (3 == size)
+//         LOGD("%.2f %.2f %.2f", attrib[i * 3 + 0], attrib[i * 3 + 1], attrib[i * 3 + 2]);
+//      else if (2 == size)
+//         LOGD("%.2f %.2f", attrib[i * 3 + 0], attrib[i * 3 + 1]);
+   
+}
+
+void glVertexAttrib1f(GLuint indx, GLfloat x)
+{
+   glVertexAttrib4f(indx, x,0,0,1);
+}
+
+void glVertexAttrib1fv(GLuint indx, const GLfloat* values)
+{
+   glVertexAttrib4f(indx, values[0],0,0,1);
+}
+
+void glVertexAttrib2f(GLuint indx, GLfloat x, GLfloat y)
+{
+   glVertexAttrib4f(indx, x,y,0,1);
+}
+
+void glVertexAttrib2fv(GLuint indx, const GLfloat* values)
+{
+   glVertexAttrib4f(indx, values[0],values[1],0,1);
+}
+
+void glVertexAttrib3f(GLuint indx, GLfloat x, GLfloat y, GLfloat z)
+{
+   glVertexAttrib4f(indx, x,y,z,1);
+}
+
+void glVertexAttrib3fv(GLuint indx, const GLfloat* values)
+{
+   glVertexAttrib4f(indx, values[0],values[1],values[2],1);
+}
+
+void glVertexAttrib4f(GLuint indx, GLfloat x, GLfloat y, GLfloat z, GLfloat w)
+{
+   assert(GGL_MAXVERTEXATTRIBS > indx);
+   GLES2_GET_CONST_CONTEXT(ctx);
+//   LOGD("\n*\n*\n agl2: glVertexAttrib4f %d %.2f,%.2f,%.2f,%.2f \n*\n*", indx, x, y, z, w);
+   ctx->vert.defaultAttribs[indx] = Vector4(x,y,z,w);
+   assert(0);
+}
+
+void glVertexAttrib4fv(GLuint indx, const GLfloat* values)
+{
+   glVertexAttrib4f(indx, values[0], values[1], values[2], values[3]);
+}