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-rw-r--r--jni/jni_egl_fence.cpp44
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diff --git a/jni/jni_egl_fence.cpp b/jni/jni_egl_fence.cpp
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+/*
+ * 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 <cutils/log.h>
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
+void
+Java_com_android_gallery3d_photoeditor_FilterStack_nativeEglSetFenceAndWait(JNIEnv* env,
+ jobject thiz) {
+ 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 = eglCreateSyncKHR(display, EGL_SYNC_FENCE_KHR, NULL);
+ if (fence == EGL_NO_SYNC_KHR) {
+ return;
+ }
+
+ EGLint result = eglClientWaitSyncKHR(display,
+ fence,
+ EGL_SYNC_FLUSH_COMMANDS_BIT_KHR,
+ EGL_FOREVER_KHR);
+ if (result == EGL_FALSE) {
+ ALOGE("EGL FENCE: error waiting for fence: %#x", eglGetError());
+ }
+ eglDestroySyncKHR(display, fence);
+}