1 files changed, 78 insertions, 0 deletions
diff --git a/jni/jni_egl_fence.cpp b/jni/jni_egl_fence.cpp
new file mode 100644
index 000000000..cf15e2f5d
--- /dev/null
+++ b/jni/jni_egl_fence.cpp
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2012 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 "jni_egl_fence.h"
+
+#include <android/log.h>
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+#include <string.h>
+
+#define  ALOGE(...)  __android_log_print(ANDROID_LOG_ERROR,"egl_fence",__VA_ARGS__)
+
+typedef EGLSyncKHR EGLAPIENTRY (*TypeEglCreateSyncKHR)(EGLDisplay dpy,
+    EGLenum type, const EGLint *attrib_list);
+typedef EGLBoolean EGLAPIENTRY (*TypeEglDestroySyncKHR)(EGLDisplay dpy,
+    EGLSyncKHR sync);
+typedef EGLint EGLAPIENTRY (*TypeEglClientWaitSyncKHR)(EGLDisplay dpy,
+    EGLSyncKHR sync, EGLint flags, EGLTimeKHR timeout);
+static TypeEglCreateSyncKHR FuncEglCreateSyncKHR = NULL;
+static TypeEglClientWaitSyncKHR FuncEglClientWaitSyncKHR = NULL;
+static TypeEglDestroySyncKHR FuncEglDestroySyncKHR = NULL;
+static bool initialized = false;
+static bool egl_khr_fence_sync_supported = false;
+
+bool IsEglKHRFenceSyncSupported() {
+  if (!initialized) {
+    EGLDisplay display = eglGetCurrentDisplay();
+    const char* eglExtensions = eglQueryString(eglGetCurrentDisplay(), EGL_EXTENSIONS);
+    if (eglExtensions && strstr(eglExtensions, "EGL_KHR_fence_sync")) {
+      FuncEglCreateSyncKHR = (TypeEglCreateSyncKHR) eglGetProcAddress("eglCreateSyncKHR");
+      FuncEglClientWaitSyncKHR = (TypeEglClientWaitSyncKHR) eglGetProcAddress("eglClientWaitSyncKHR");
+      FuncEglDestroySyncKHR = (TypeEglDestroySyncKHR) eglGetProcAddress("eglDestroySyncKHR");
+      if (FuncEglCreateSyncKHR != NULL && FuncEglClientWaitSyncKHR != NULL
+          && FuncEglDestroySyncKHR != NULL) {
+        egl_khr_fence_sync_supported = true;
+      }
+    }
+    initialized = true;
+  }
+  return egl_khr_fence_sync_supported;
+}
+
+void
+Java_com_android_gallery3d_photoeditor_FilterStack_nativeEglSetFenceAndWait(JNIEnv* env,
+                                                                          jobject thiz) {
+  if (!IsEglKHRFenceSyncSupported()) return;
+  EGLDisplay display = eglGetCurrentDisplay();
+
+  // Create a egl fence and wait for egl to return it.
+  // Additional reference on egl fence sync can be found in:
+  // http://www.khronos.org/registry/vg/extensions/KHR/EGL_KHR_fence_sync.txt
+  EGLSyncKHR fence = FuncEglCreateSyncKHR(display, EGL_SYNC_FENCE_KHR, NULL);
+  if (fence == EGL_NO_SYNC_KHR) {
+    return;
+  }
+
+  EGLint result = FuncEglClientWaitSyncKHR(display,
+                                       fence,
+                                       EGL_SYNC_FLUSH_COMMANDS_BIT_KHR,
+                                       EGL_FOREVER_KHR);
+  if (result == EGL_FALSE) {
+    ALOGE("EGL FENCE: error waiting for fence: %#x", eglGetError());
+  }
+  FuncEglDestroySyncKHR(display, fence);
+}