From 1c3d72a2291827fb15e2ef311a571c860e0dba41 Mon Sep 17 00:00:00 2001
From: Jonas Yang <joyang@nvidia.com>
Date: Fri, 26 Aug 2011 20:04:39 +0800
Subject: [PATCH] Add (support for) EGL_NV_system_time extension.

Change-Id: I62bf0fcb5ccdc77c042b425a42054fb3122575b6
Signed-off-by: Mathias Agopian <mathias@google.com>
---
 opengl/include/EGL/eglext.h    | 14 ++++++++++
 opengl/libs/EGL/eglApi.cpp     | 48 ++++++++++++++++++++++++++++++++++
 opengl/libs/EGL/egl_entries.in |  5 ++++
 3 files changed, 67 insertions(+)

diff --git a/opengl/include/EGL/eglext.h b/opengl/include/EGL/eglext.h
index 6a199db15..a08932a3d 100644
--- a/opengl/include/EGL/eglext.h
+++ b/opengl/include/EGL/eglext.h
@@ -242,6 +242,20 @@ typedef EGLBoolean (EGLAPIENTRYP PFNEGLSETSWAPRECTANGLEANDROIDPROC) (EGLDisplay
 #define EGL_RECORDABLE_ANDROID                  0x3142  /* EGLConfig attribute */
 #endif
 
+/* EGL_NV_system_time
+ */
+#ifndef EGL_NV_system_time
+#define EGL_NV_system_time 1
+typedef khronos_int64_t EGLint64NV;
+typedef khronos_uint64_t EGLuint64NV;
+#ifdef EGL_EGLEXT_PROTOTYPES
+EGLAPI EGLuint64NV EGLAPIENTRY eglGetSystemTimeFrequencyNV(void);
+EGLAPI EGLuint64NV EGLAPIENTRY eglGetSystemTimeNV(void);
+#endif
+typedef EGLuint64NV (EGLAPIENTRYP PFNEGLGETSYSTEMTIMEFREQUENCYNVPROC)(void);
+typedef EGLuint64NV (EGLAPIENTRYP PFNEGLGETSYSTEMTIMENVPROC)(void);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/opengl/libs/EGL/eglApi.cpp b/opengl/libs/EGL/eglApi.cpp
index 7e8523031..23f67d54a 100644
--- a/opengl/libs/EGL/eglApi.cpp
+++ b/opengl/libs/EGL/eglApi.cpp
@@ -62,6 +62,7 @@ static char const * const sExtensionString  =
         "EGL_KHR_fence_sync "
         "EGL_ANDROID_image_native_buffer "
         "EGL_ANDROID_swap_rectangle "
+        "EGL_NV_system_time "
         ;
 
 struct extention_map_t {
@@ -80,6 +81,10 @@ static const extention_map_t sExtentionMap[] = {
             (__eglMustCastToProperFunctionPointerType)&eglDestroyImageKHR },
     { "eglSetSwapRectangleANDROID",
             (__eglMustCastToProperFunctionPointerType)&eglSetSwapRectangleANDROID },
+    { "eglGetSystemTimeFrequencyNV",
+            (__eglMustCastToProperFunctionPointerType)&eglGetSystemTimeFrequencyNV },
+    { "eglGetSystemTimeNV",
+            (__eglMustCastToProperFunctionPointerType)&eglGetSystemTimeNV },
 };
 
 // accesses protected by sExtensionMapMutex
@@ -1454,3 +1459,46 @@ EGLBoolean eglSetSwapRectangleANDROID(EGLDisplay dpy, EGLSurface draw,
     }
     return setError(EGL_BAD_DISPLAY, NULL);
 }
+
+// ----------------------------------------------------------------------------
+// NVIDIA extensions
+// ----------------------------------------------------------------------------
+EGLuint64NV eglGetSystemTimeFrequencyNV()
+{
+    clearError();
+
+    if (egl_init_drivers() == EGL_FALSE) {
+        return setError(EGL_BAD_PARAMETER, EGL_FALSE);
+    }
+
+    EGLuint64NV ret = 0;
+    egl_connection_t* const cnx = &gEGLImpl[IMPL_HARDWARE];
+
+    if (cnx->dso) {
+        if (cnx->egl.eglGetSystemTimeFrequencyNV) {
+            return cnx->egl.eglGetSystemTimeFrequencyNV();
+        }
+    }
+
+    return setError(EGL_BAD_DISPLAY, 0);;
+}
+
+EGLuint64NV eglGetSystemTimeNV()
+{
+    clearError();
+
+    if (egl_init_drivers() == EGL_FALSE) {
+        return setError(EGL_BAD_PARAMETER, EGL_FALSE);
+    }
+
+    EGLuint64NV ret = 0;
+    egl_connection_t* const cnx = &gEGLImpl[IMPL_HARDWARE];
+
+    if (cnx->dso) {
+        if (cnx->egl.eglGetSystemTimeNV) {
+            return cnx->egl.eglGetSystemTimeNV();
+        }
+    }
+
+    return setError(EGL_BAD_DISPLAY, 0);;
+}
diff --git a/opengl/libs/EGL/egl_entries.in b/opengl/libs/EGL/egl_entries.in
index 63c3c1905..bdd2a7eec 100644
--- a/opengl/libs/EGL/egl_entries.in
+++ b/opengl/libs/EGL/egl_entries.in
@@ -62,3 +62,8 @@ EGL_ENTRY(EGLBoolean,   eglGetSyncAttribKHR,    EGLDisplay, EGLSyncKHR, EGLint,
 
 EGL_ENTRY(EGLBoolean, eglSetSwapRectangleANDROID, EGLDisplay, EGLSurface, EGLint, EGLint, EGLint, EGLint)
 EGL_ENTRY(EGLClientBuffer, eglGetRenderBufferANDROID, EGLDisplay, EGLSurface)
+
+/* NVIDIA extensions */
+
+EGL_ENTRY(EGLuint64NV, eglGetSystemTimeFrequencyNV, void)
+EGL_ENTRY(EGLuint64NV, eglGetSystemTimeNV, void)