Use EGL and Surfaceflinger to display.

4 files changed, 2083 insertions, 26 deletions

diff --git a/Android.mk b/Android.mk
index 9853f77..b915a36 100644
--- a/Android.mk
+++ b/Android.mk
@@ -157,13 +157,22 @@ LOCAL_CFLAGS += -DDEBUG -UNDEBUG -O0 -g
 LOCAL_MODULE := mesa
 LOCAL_SRC_FILES := $(mesa_SRC_FILES)
 
+LOCAL_SHARED_LIBRARIES := libstlport libcutils libdl
+
+LOCAL_SRC_FILES += egl.cpp
+#libutils libhardware libsurfaceflinger_client libpixelflinger
+# libsurfaceflinger_client and libpixelflinger causes hieralloc assertion
+LOCAL_SHARED_LIBRARIES += libutils libhardware libsurfaceflinger_client libpixelflinger
+LOCAL_CPPFLAGS += -DDRAW_TO_SCREEN=1
+LOCAL_CFLAGS += -fvisibility=hidden
+LOCAL_CFLAGS += -fstrict-aliasing
+
 ifeq ($(USE_LLVM_EXECUTIONENGINE),true)
 LOCAL_CPPFLAGS += -DUSE_LLVM_EXECUTIONENGINE
 LOCAL_CFLAGS += -DUSE_LLVM_EXECUTIONENGINE
 LOCAL_STATIC_LIBRARIES :=  libLLVMARMCodeGen libLLVMARMInfo libLLVMARMDisassembler libLLVMARMAsmPrinter $(mesa_STATIC_LIBS)
-LOCAL_SHARED_LIBRARIES := libstlport libcutils libdl 
 else
-LOCAL_SHARED_LIBRARIES := libstlport libcutils libdl libbcc 
+LOCAL_SHARED_LIBRARIES += libbcc 
 endif
 
 LOCAL_C_INCLUDES :=	\
diff --git a/egl.cpp b/egl.cpp
new file mode 100644
index 0000000..f2ddbda
--- /dev/null
+++ b/egl.cpp
@@ -0,0 +1,2002 @@
+/*
+**
+** 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 <assert.h>
+#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/log.h>
+#include <cutils/atomic.h>
+
+#include <pthread.h>
+//#include <utils/threads.h>
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+#include <GLES/gl.h>
+#include <GLES/glext.h>
+
+#include <pixelflinger/format.h>
+#include <pixelflinger/pixelflinger.h>
+//#include "pixelflinger2_format.h"
+//#include "pixelflinger2_interface.h"
+
+#include <private/ui/android_natives_priv.h>
+
+//#include <binder/Parcel.h>
+#include <surfaceflinger/Surface.h>
+#include <surfaceflinger/ISurface.h>
+#include <surfaceflinger/SurfaceComposerClient.h>
+
+#include <hardware/copybit.h>
+
+#undef NELEM
+#define NELEM(x) (sizeof(x)/sizeof(*(x)))
+
+#define ggl_unlikely(EXP) (EXP)
+#define ggl_likely(EXP) (EXP)
+#define min(A,B) ((A)<(B)?(A):(B))
+#define max(A,B) ((A)>(B)?(A):(B))
+// ----------------------------------------------------------------------------
+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);
+   pthread_setspecific(gEGLErrorKey, (void*)EGL_SUCCESS);
+   return error;
+}
+
+static struct ogles_context_t * global_ctx;
+
+struct ogles_context_t {
+   struct context_t {
+      struct egl_context_t* base;
+   } rasterizer;
+
+   unsigned width, height, stride, format; // curret backbuffer
+   void * bits;
+
+   // copybits is only used if LIBAGL_USE_GRALLOC_COPYBITS is
+   // defined, but it is always present because ogles_context_t is a public
+   // struct that is used by clients of libagl. We want the size and offsets
+   // to stay the same, whether or not LIBAGL_USE_GRALLOC_COPYBITS is defined.
+
+   //copybits_context_t      copybits;
+
+   GLenum                  error;
+
+   static inline ogles_context_t* get() {
+      return global_ctx;
+   }
+};
+
+ogles_context_t * getGlThreadSpecific()
+{
+   return global_ctx;
+}
+void setGlThreadSpecific(ogles_context_t * ctx)
+{
+   global_ctx = ctx;
+}
+
+// ----------------------------------------------------------------------------
+
+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_context_t {
+   enum {
+      IS_CURRENT      =   0x00010000,
+      NEVER_CURRENT   =   0x00020000
+   };
+   uint32_t            flags;
+   EGLDisplay          dpy;
+   EGLConfig           config;
+   EGLSurface          read;
+   EGLSurface          draw;
+
+   static inline egl_context_t* context(EGLContext ctx) {
+      ogles_context_t* const gl = static_cast<ogles_context_t*>(ctx);
+      return static_cast<egl_context_t*>(gl->rasterizer.base);
+   }
+};
+
+// ----------------------------------------------------------------------------
+
+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(ogles_context_t* gl) = 0;
+   //virtual     EGLBoolean  bindReadSurface(ogles_context_t* 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 = 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(ogles_context_t* gl);
+   //virtual     EGLBoolean  bindReadSurface(ogles_context_t* 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);
+}
+
+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
+      depth.data    = (GGLubyte*)malloc(depth.stride*depth.height*2);
+      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
+   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(ogles_context_t* 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  = this->buffer->format;
+
+   //puts("egl_window_surface_v2_t::bindDrawSurface");
+   //printf("\t width=%d height=%d stride=%d format=%d \n", buffer.width, buffer.height, buffer.stride, buffer.format);
+
+   /*for (unsigned int y = 0; y < buffer.height; y++)
+   {
+      unsigned int * line = (unsigned int *)bits + y * buffer.stride;
+      for (unsigned int x = 0; x < buffer.width; x++)
+         line[x] = 0xff00ff00;
+   }*/
+   gl->width = this->buffer->width;
+   gl->height = this->buffer->height;
+   gl->stride = this->buffer->stride;
+   gl->format = this->buffer->format;
+   gl->bits = bits;
+
+   //gl->rasterizer.procs.colorBuffer(gl, &buffer);
+   //if (depth.data != gl->rasterizer.state.buffers.depth.data)
+   //    gl->rasterizer.procs.depthBuffer(gl, &depth);
+   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(ogles_context_t* gl);
+   //virtual     EGLBoolean  bindReadSurface(ogles_context_t* 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(ogles_context_t* gl)
+{
+   puts("egl_pixmap_surface_t::bindDrawSurface");
+   GGLSurface buffer;
+   buffer.version = sizeof(GGLSurface);
+   buffer.width   = nativePixmap.width;
+   buffer.height  = nativePixmap.height;
+   buffer.stride  = nativePixmap.stride;
+   buffer.data    = nativePixmap.data;
+   buffer.format  = nativePixmap.format;
+
+   //gl->rasterizer.procs.colorBuffer(gl, &buffer);
+   //if (depth.data != gl->rasterizer.state.buffers.depth.data)
+   //   gl->rasterizer.procs.depthBuffer(gl, &depth);
+   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(ogles_context_t* gl);
+   //virtual     EGLBoolean  bindReadSurface(ogles_context_t* 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  = 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(ogles_context_t* gl)
+{
+   puts("egl_pbuffer_surface_t::bindDrawSurface");
+   //gl->rasterizer.procs.colorBuffer(gl, &pbuffer);
+   //if (depth.data != gl->rasterizer.state.buffers.depth.data)
+   //    gl->rasterizer.procs.depthBuffer(gl, &depth);
+   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    = "1.2 Android Driver 1.2.0";
+static char const * const gClientApiString  = "OpenGL ES";
+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[] = {};
+
+/*
+ * 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_RGB_565          },
+   { 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_ES_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_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_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_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_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_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_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_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_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_16;
+      break;
+   case 2:
+      pixelFormat = GGL_PIXEL_FORMAT_RGBX_8888;
+      depthFormat = 0;
+      break;
+   case 3:
+      pixelFormat = GGL_PIXEL_FORMAT_RGBX_8888;
+      depthFormat = GGL_PIXEL_FORMAT_Z_16;
+      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_16;
+      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_16;
+      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(ogles_context_t* gl)
+{
+   ogles_context_t* current = (ogles_context_t*)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 (((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,
+                                         (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 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)
+{
+#ifndef HAVE_ANDROID_OS
+   // this just needs to be done once
+   if (gl::gGLKey == -1) {
+      pthread_mutex_lock(&gInitMutex);
+      if (gl::gGLKey == -1)
+         pthread_key_create(&gl::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)
+{
+   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)
+{
+   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)
+{
+   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;
+}
+
+EGLBoolean eglChooseConfig( EGLDisplay dpy, const EGLint *attrib_list,
+                            EGLConfig *configs, EGLint config_size,
+                            EGLint *num_config)
+{
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+
+   if (ggl_unlikely(num_config==0)) {
+      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.
+       */
+      static const EGLint dummy = EGL_NONE;
+      attrib_list = &dummy;
+   }
+
+   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) {
+            possibleMatch &= ~(1<<i);
+         }
+      }
+   }
+
+   // 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;
+   return EGL_TRUE;
+}
+
+EGLBoolean eglGetConfigAttrib(EGLDisplay dpy, EGLConfig config,
+                              EGLint attribute, EGLint *value)
+{
+   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)
+{
+   return createWindowSurface(dpy, config, window, attrib_list);
+}
+
+EGLBoolean eglDestroySurface(EGLDisplay dpy, EGLSurface eglSurface)
+{
+   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)
+{
+   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)
+{
+   if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+      return setError(EGL_BAD_DISPLAY, EGL_NO_SURFACE);
+
+   ogles_context_t* gl = new (ogles_context_t);
+   if (!gl) return setError(EGL_BAD_ALLOC, EGL_NO_CONTEXT);
+
+   gl->rasterizer.base = new egl_context_t;
+   egl_context_t* c = static_cast<egl_context_t*>(gl->rasterizer.base);
+   c->flags = egl_context_t::NEVER_CURRENT;
+   c->dpy = dpy;
+   c->config = config;
+   c->read = 0;
+   c->draw = 0;
+   return (EGLContext)gl;
+}
+
+EGLBoolean eglDestroyContext(EGLDisplay dpy, EGLContext ctx)
+{
+   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);
+   delete ((ogles_context_t*)ctx);
+   return EGL_TRUE;
+}
+
+#define __LINE_STRING_0__(s)   #s
+#define __LINE_STRING_1__(s)   __LINE_STRING_0__(s)
+#define __LINE_STRING__      __LINE_STRING_1__(__LINE__)
+
+EGLBoolean eglMakeCurrent(  EGLDisplay dpy, EGLSurface draw,
+                            EGLSurface read, EGLContext ctx)
+{
+   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);
+      }
+   }
+
+   puts("eglMakeCurrent:"__LINE_STRING__);
+   ogles_context_t* gl = (ogles_context_t*)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();
+         }
+
+         c->draw = draw;
+         c->read = read;
+         puts("eglMakeCurrent:"__LINE_STRING__);
+         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 {
+         puts("eglMakeCurrent:"__LINE_STRING__);
+         // 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 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((ogles_context_t*)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((ogles_context_t*)d->ctx);
+      }
+   }
+
+   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);
+}
+
+// ----------------------------------------------------------------------------
+// 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;
+}
+
+sp<SurfaceComposerClient> client;
+sp<SurfaceControl> surfaceControl;
+sp<Surface> surface;
+ANativeWindow * window;
+EGLDisplay display;
+EGLContext eglCtx;
+EGLSurface drawSurface;
+
+extern "C" int SetupDrawingSurface(unsigned * width, unsigned * height, unsigned * bpp)
+{
+   // create a client to surfaceflinger
+   client = new SurfaceComposerClient();
+
+   surfaceControl = client->createSurface(getpid(), 0, 1280, 800, PIXEL_FORMAT_RGBA_8888);
+   client->openTransaction();
+   surfaceControl->setLayer(25000);
+   client->closeTransaction();
+
+   surface = surfaceControl->getSurface();
+   window = surface.get();
+
+   printf("window=%p\n", window);
+
+   display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+
+   EGLint attrib_list[] = {
+      EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
+      EGL_BUFFER_SIZE, 32,
+      EGL_RED_SIZE, 8,
+      EGL_GREEN_SIZE, 8,
+      EGL_BLUE_SIZE, 8,
+      EGL_NONE
+   };
+
+   EGLConfig configs[12] = {0};
+   int num_config = -1;
+   eglChooseConfig(display, attrib_list, configs, sizeof(configs) / sizeof(*configs), &num_config);
+   printf("eglChooseConfig %d \n", num_config);
+
+   eglCtx = eglCreateContext(display, configs[0], NULL, NULL);
+   printf("eglCtx=%p \n", eglCtx);
+   android::global_ctx = (android::ogles_context_t *)eglCtx;
+
+   drawSurface = eglCreateWindowSurface(display, configs[0], window, NULL);
+   printf("drawSurface=%p \n", drawSurface);
+
+   EGLBoolean ret = eglMakeCurrent(display, drawSurface, drawSurface, eglCtx);
+   printf("eglMakeCurrent=%d \n", ret);
+   assert(EGL_TRUE == ret);
+
+   ret = eglSwapBuffers(display, drawSurface);
+   printf("eglSwapBuffers=%d \n", ret);
+   assert(EGL_TRUE == ret);
+
+   ogles_context_t * gl = (ogles_context_t *)eglCtx;
+   *width = gl->width;
+   *height = gl->height;
+   assert(PIXEL_FORMAT_RGBA_8888 == gl->format);
+   *bpp = 32;
+
+   puts("end SetupDrawingSurface");
+   return 0;
+}
+
+extern "C" void * PresentDrawingSurface()
+{
+   EGLBoolean ret = eglSwapBuffers(display, drawSurface);
+   //printf("eglSwapBuffers=%d \n", ret);
+   assert(EGL_TRUE == ret);
+
+   ogles_context_t * gl = (ogles_context_t *)eglCtx;
+   assert(gl->width == gl->stride);
+   assert(PIXEL_FORMAT_RGBA_8888 == gl->format);
+   return gl->bits;
+}
+
+extern "C" void DisposeDrawingSurface()
+{
+   eglDestroySurface(display, drawSurface);
+   eglDestroyContext(display, eglCtx);
+
+   puts("DisposeDrawingSurface");
+}
diff --git a/src/glsl/main.cpp b/src/glsl/main.cpp
index a4dbbda..e99f2c1 100644
--- a/src/glsl/main.cpp
+++ b/src/glsl/main.cpp
@@ -254,14 +254,28 @@ compile_shader(struct gl_context *ctx, struct gl_shader *shader)
    return;
 }
 
-
+//#define DRAW_TO_SCREEN 1
 #include "image_file.h"
 
+#if defined __arm__ && defined DRAW_TO_SCREEN
+extern "C" int SetupDrawingSurface(unsigned * width, unsigned * height, unsigned * bpp);
+extern "C" void * PresentDrawingSurface();
+extern "C" void DisposeDrawingSurface();
+#endif 
+
 void execute(void (* function)(), float * data)
 {
+#if defined __arm__ && DRAW_TO_SCREEN
+   unsigned width = 0, height = 0, bpp = 0;
+   int err = SetupDrawingSurface(&width, &height, &bpp);
+   assert(!err);
+   assert(32 == bpp);
+   unsigned * frameSurface = (unsigned *)PresentDrawingSurface();
+#else
    const unsigned width = 480, height = 800;
-   const unsigned wd = 200, ht = 200;
    unsigned * frameSurface = new unsigned [width * height];
+#endif
+   const unsigned scale = 16, portWidth = 80, portHeight = 50;
    float * constants = data + 36;
    float * outputs = data + 0;
    float * inputs = data + 12;
@@ -277,40 +291,64 @@ void execute(void (* function)(), float * data)
    }
    #endif
    //*/
+   
 
-   unsigned frames = 1;
 
+   unsigned frames = 1;
    clock_t c0 = clock();
-   //for (unsigned i = 0; i < 480 * 800; i++)
-   for (unsigned y = 0; y < ht; y++)
-      for (unsigned x = 0; x < wd; x++) {
-         //data[36] = (float)i / 10000;
-         //memset(data, i, sizeof(data));
-         inputs[0] = ((float)x) / wd;
-         inputs[1] = ((float)y) / ht;
-         inputs[2] = 0;
-         inputs[3] = 1;
-         constants[0] = 0.0f;
-         function();
-         unsigned r = outputs[0] * 255;
-         unsigned g = outputs[1] * 255;
-         unsigned b = outputs[2] * 255;
-         unsigned a = outputs[3] * 255;
-         frameSurface[y * width + x] = (a << 24) | (b << 16) | (g << 8) | r;
-
-      }
+   
+   while(true)
+   for (frames = 1; frames <= 100; frames++)
+   {
+      inputs[2] = 0;
+      inputs[3] = 1;
+      constants[0] = frames * 0.6f;
+            
+      //for (unsigned i = 0; i < 480 * 800; i++)
+      for (unsigned y = 0; y < portHeight; y++)
+         for (unsigned x = 0; x < portWidth; x++) {
+            //data[36] = (float)i / 10000;
+            //memset(data, i, sizeof(data));
+            inputs[0] = ((float)x) / (portWidth - 1);
+            inputs[1] = ((float)y) / (portHeight - 1);
+            function();
+            unsigned r = outputs[0] * 255;
+            unsigned g = outputs[1] * 255;
+            unsigned b = outputs[2] * 255;
+            unsigned a = outputs[3] * 255;
+            frameSurface[y * width + x] = (a << 24) | (b << 16) | (g << 8) | r;
+         }
+      //*
+      for (int y = portHeight - 1; y >= 0; y--)
+         for (int x = portWidth - 1; x >= 0; x--)
+         {
+               unsigned pixel = ((unsigned *)frameSurface)[y * width + x];
+               for (unsigned xx = 0; xx < scale; xx++)
+                  for (unsigned yy = 0; yy < scale; yy++)
+                     ((unsigned *)frameSurface)[(y * scale + yy) * width + x * scale + xx] = pixel;
+         }
+         //*/
+#if defined __arm__ && DRAW_TO_SCREEN
+      frameSurface = (unsigned *)PresentDrawingSurface();
+#endif
+   }
 
    float elapsed = (float)(clock() - c0) / CLOCKS_PER_SEC;
    printf ("\n *** test_scan elapsed CPU time: %fs \n *** fps=%.2f, tpf=%.2fms \n",
            elapsed, frames / elapsed, elapsed / frames * 1000);
    printf("gl_FragColor=%.2f, %.2f, %.2f %.2f \n", outputs[0], outputs[1], outputs[2], outputs[3]);
    assert(0.1f < outputs[3]);
-#ifdef __arm__
+#if defined __arm__
    SaveBMP("/sdcard/mesa.bmp", frameSurface, width, height);
 #else
    SaveBMP("mesa.bmp", frameSurface, width, height);
 #endif
+#if DRAW_TO_SCREEN
+   void DisposeDrawingSurface();
+#else
    delete frameSurface;
+#endif
+ 
 }
 
 //#def USE_LLVM_EXECUTIONENGINE 1
@@ -411,6 +449,7 @@ static void* symbolLookup(void* pContext, const char* name)
 
    }
    printf("symbolLookup '%s'=%p \n", name, symbol);
+   //getchar();
    assert(symbol);
    return symbol;
 }
@@ -551,7 +590,8 @@ main(int argc, char **argv)
 
       llvm::Module * module = glsl_ir_to_llvm_module(ir);
       assert(module);
-      puts("module translated");
+      puts("\n *** Module for JIT *** \n");
+      module->dump();
       jit(module);
       puts("jitted");
    }
diff --git a/src/talloc/hieralloc.c b/src/talloc/hieralloc.c
index 3219a15..35ade04 100644
--- a/src/talloc/hieralloc.c
+++ b/src/talloc/hieralloc.c
@@ -64,7 +64,13 @@ static void remove_from_parent(hieralloc_header_t * header)
 	hieralloc_header_t * sibling = header->prevSibling;
 	if (sibling)
 	{
-		assert(sibling->nextSibling == header);
+      if (sibling->nextSibling != header)
+      {
+         printf("&sibling->nextSibling=%p &header=%p \n", &sibling->nextSibling, &header);
+			printf("sibling->nextSibling=%p header=%p \n", sibling->nextSibling, header);
+      }
+		// TODO: assert breaks on device linking with some libsurfaceflinger_client and libpixelflinger
+      //assert(sibling->nextSibling == header);
 		sibling->nextSibling = header->nextSibling;
 		if (header->nextSibling)
 			header->nextSibling->prevSibling = sibling;