diff --git a/opengl/libs/EGL/eglApi.cpp b/opengl/libs/EGL/eglApi.cpp
index 978ab04..c1f2b2e 100644
--- a/opengl/libs/EGL/eglApi.cpp
+++ b/opengl/libs/EGL/eglApi.cpp
@@ -54,26 +54,106 @@
 
 #define EGL_VERSION_HW_ANDROID  0x3143
 
+namespace android {
+
 struct extention_map_t {
     const char* name;
     __eglMustCastToProperFunctionPointerType address;
 };
 
-static const extention_map_t sExtentionMap[] = {
+/*
+ * This is the list of EGL extensions exposed to applications,
+ * some of them are mandatory because used by the ANDROID system.
+ *
+ * Mandatory extensions are required per the CDD and not explicitly
+ * checked during EGL initialization. the system *assumes* these extensions
+ * are present. the system may not function properly if some mandatory
+ * extensions are missing.
+ *
+ * NOTE: gExtensionString MUST have a single space as the last character.
+ */
+extern char const * const gExtensionString  =
+        "EGL_KHR_image "                        // mandatory
+        "EGL_KHR_image_base "                   // mandatory
+        "EGL_KHR_image_pixmap "
+        "EGL_KHR_lock_surface "
+        "EGL_KHR_gl_texture_2D_image "
+        "EGL_KHR_gl_texture_cubemap_image "
+        "EGL_KHR_gl_renderbuffer_image "
+        "EGL_KHR_reusable_sync "
+        "EGL_KHR_fence_sync "
+        "EGL_EXT_create_context_robustness "
+        "EGL_NV_system_time "
+        "EGL_ANDROID_image_native_buffer "      // mandatory
+        "EGL_ANDROID_wait_sync "                // strongly recommended
+        "EGL_ANDROID_presentation_time "
+        ;
+
+// extensions not exposed to applications but used by the ANDROID system
+//      "EGL_ANDROID_blob_cache "               // strongly recommended
+//      "EGL_IMG_hibernate_process "            // optional
+//      "EGL_ANDROID_native_fence_sync "        // strongly recommended
+//      "EGL_ANDROID_framebuffer_target "       // mandatory for HWC 1.1
+//      "EGL_ANDROID_recordable "               // mandatory
+
+
+/*
+ * EGL Extensions entry-points exposed to 3rd party applications
+ * (keep in sync with gExtensionString above)
+ *
+ */
+static const extention_map_t sExtensionMap[] = {
+    // EGL_KHR_lock_surface
     { "eglLockSurfaceKHR",
             (__eglMustCastToProperFunctionPointerType)&eglLockSurfaceKHR },
     { "eglUnlockSurfaceKHR",
             (__eglMustCastToProperFunctionPointerType)&eglUnlockSurfaceKHR },
+
+    // EGL_KHR_image, EGL_KHR_image_base
     { "eglCreateImageKHR",
             (__eglMustCastToProperFunctionPointerType)&eglCreateImageKHR },
     { "eglDestroyImageKHR",
             (__eglMustCastToProperFunctionPointerType)&eglDestroyImageKHR },
+
+    // EGL_KHR_reusable_sync, EGL_KHR_fence_sync
+    { "eglCreateSyncKHR",
+            (__eglMustCastToProperFunctionPointerType)&eglCreateSyncKHR },
+    { "eglDestroySyncKHR",
+            (__eglMustCastToProperFunctionPointerType)&eglDestroySyncKHR },
+    { "eglClientWaitSyncKHR",
+            (__eglMustCastToProperFunctionPointerType)&eglClientWaitSyncKHR },
+    { "eglSignalSyncKHR",
+            (__eglMustCastToProperFunctionPointerType)&eglSignalSyncKHR },
+    { "eglGetSyncAttribKHR",
+            (__eglMustCastToProperFunctionPointerType)&eglGetSyncAttribKHR },
+
+    // EGL_NV_system_time
     { "eglGetSystemTimeFrequencyNV",
             (__eglMustCastToProperFunctionPointerType)&eglGetSystemTimeFrequencyNV },
     { "eglGetSystemTimeNV",
             (__eglMustCastToProperFunctionPointerType)&eglGetSystemTimeNV },
+
+    // EGL_ANDROID_wait_sync
+    { "eglWaitSyncANDROID",
+            (__eglMustCastToProperFunctionPointerType)&eglWaitSyncANDROID },
+
+    // EGL_ANDROID_presentation_time
+    { "eglPresentationTimeANDROID",
+            (__eglMustCastToProperFunctionPointerType)&eglPresentationTimeANDROID },
 };
 
+/*
+ * These extensions entry-points should not be exposed to applications.
+ * They're used internally by the Android EGL layer.
+ */
+#define FILTER_EXTENSIONS(procname) \
+        (!strcmp((procname), "eglSetBlobCacheFuncsANDROID") ||    \
+         !strcmp((procname), "eglHibernateProcessIMG")      ||    \
+         !strcmp((procname), "eglAwakenProcessIMG")         ||    \
+         !strcmp((procname), "eglDupNativeFenceFDANDROID"))
+
+
+
 // accesses protected by sExtensionMapMutex
 static DefaultKeyedVector<String8, __eglMustCastToProperFunctionPointerType> sGLExtentionMap;
 static int sGLExtentionSlot = 0;
@@ -91,15 +171,16 @@
 
 // ----------------------------------------------------------------------------
 
-namespace android {
 extern void setGLHooksThreadSpecific(gl_hooks_t const *value);
 extern EGLBoolean egl_init_drivers();
 extern const __eglMustCastToProperFunctionPointerType gExtensionForwarders[MAX_NUMBER_OF_GL_EXTENSIONS];
 extern int getEGLDebugLevel();
 extern void setEGLDebugLevel(int level);
 extern gl_hooks_t gHooksTrace;
+
 } // namespace android;
 
+
 // ----------------------------------------------------------------------------
 
 static inline void clearError() { egl_tls_t::clearError(); }
@@ -707,18 +788,12 @@
         return  NULL;
     }
 
-    // These extensions should not be exposed to applications. They're used
-    // internally by the Android EGL layer.
-    if (!strcmp(procname, "eglSetBlobCacheFuncsANDROID") ||
-        !strcmp(procname, "eglDupNativeFenceFDANDROID") ||
-        !strcmp(procname, "eglWaitSyncANDROID") ||
-        !strcmp(procname, "eglHibernateProcessIMG") ||
-        !strcmp(procname, "eglAwakenProcessIMG")) {
+    if (FILTER_EXTENSIONS(procname)) {
         return NULL;
     }
 
     __eglMustCastToProperFunctionPointerType addr;
-    addr = findProcAddress(procname, sExtentionMap, NELEM(sExtentionMap));
+    addr = findProcAddress(procname, sExtensionMap, NELEM(sExtensionMap));
     if (addr) return addr;
 
 
@@ -1239,6 +1314,21 @@
     return result;
 }
 
+EGLBoolean eglSignalSyncKHR(EGLDisplay dpy, EGLSyncKHR sync, EGLenum mode) {
+    clearError();
+
+    const egl_display_ptr dp = validate_display(dpy);
+    if (!dp) return EGL_FALSE;
+
+    EGLBoolean result = EGL_FALSE;
+    egl_connection_t* const cnx = &gEGLImpl;
+    if (cnx->dso && cnx->egl.eglSignalSyncKHR) {
+        result = cnx->egl.eglSignalSyncKHR(
+                dp->disp.dpy, sync, mode);
+    }
+    return result;
+}
+
 EGLint eglClientWaitSyncKHR(EGLDisplay dpy, EGLSyncKHR sync,
         EGLint flags, EGLTimeKHR timeout)
 {
diff --git a/opengl/libs/EGL/egl_display.cpp b/opengl/libs/EGL/egl_display.cpp
index 7ca9e40..59dd2d9 100644
--- a/opengl/libs/EGL/egl_display.cpp
+++ b/opengl/libs/EGL/egl_display.cpp
@@ -34,35 +34,7 @@
 static char const * const sVersionString    = "1.4 Android META-EGL";
 static char const * const sClientApiString  = "OpenGL_ES";
 
-// this is the list of EGL extensions that are exposed to applications
-// some of them are mandatory because used by the ANDROID system.
-//
-// mandatory extensions are required per the CDD and not explicitly
-// checked during EGL initialization. the system *assumes* these extensions
-// are present. the system may not function properly if some mandatory
-// extensions are missing.
-//
-// NOTE: sExtensionString MUST be have a single space as the last character.
-//
-static char const * const sExtensionString  =
-        "EGL_KHR_image "                        // mandatory
-        "EGL_KHR_image_base "                   // mandatory
-        "EGL_KHR_image_pixmap "
-        "EGL_KHR_gl_texture_2D_image "
-        "EGL_KHR_gl_texture_cubemap_image "
-        "EGL_KHR_gl_renderbuffer_image "
-        "EGL_KHR_fence_sync "
-        "EGL_EXT_create_context_robustness "
-        "EGL_NV_system_time "
-        "EGL_ANDROID_image_native_buffer "      // mandatory
-        ;
-
-// extensions not exposed to applications but used by the ANDROID system
-//      "EGL_ANDROID_recordable "               // mandatory
-//      "EGL_ANDROID_framebuffer_target "       // mandatory for HWC 1.1
-//      "EGL_ANDROID_blob_cache "               // strongly recommended
-//      "EGL_ANDROID_native_fence_sync "        // strongly recommended
-//      "EGL_IMG_hibernate_process "            // optional
+extern char const * const gExtensionString;
 
 extern void initEglTraceLevel();
 extern void initEglDebugLevel();
@@ -211,7 +183,7 @@
     mClientApiString.setTo(sClientApiString);
 
     // we only add extensions that exist in the implementation
-    char const* start = sExtensionString;
+    char const* start = gExtensionString;
     char const* end;
     do {
         // find the space separating this extension for the next one
diff --git a/opengl/libs/EGL/egl_entries.in b/opengl/libs/EGL/egl_entries.in
index 2ffd417..612c232 100644
--- a/opengl/libs/EGL/egl_entries.in
+++ b/opengl/libs/EGL/egl_entries.in
@@ -56,6 +56,7 @@
 EGL_ENTRY(EGLSyncKHR,   eglCreateSyncKHR,       EGLDisplay, EGLenum, const EGLint *)
 EGL_ENTRY(EGLBoolean,   eglDestroySyncKHR,      EGLDisplay, EGLSyncKHR)
 EGL_ENTRY(EGLint,       eglClientWaitSyncKHR,   EGLDisplay, EGLSyncKHR, EGLint, EGLTimeKHR)
+EGL_ENTRY(EGLBoolean,   eglSignalSyncKHR,       EGLDisplay, EGLSyncKHR, EGLenum)
 EGL_ENTRY(EGLBoolean,   eglGetSyncAttribKHR,    EGLDisplay, EGLSyncKHR, EGLint, EGLint *)
 
 /* ANDROID extensions */