1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "jni_egl_fence.h"
18
19#include <android/log.h>
20#include <EGL/egl.h>
21#include <EGL/eglext.h>
22#include <string.h>
23
24#define  ALOGE(...)  __android_log_print(ANDROID_LOG_ERROR,"egl_fence",__VA_ARGS__)
25
26typedef EGLSyncKHR EGLAPIENTRY (*TypeEglCreateSyncKHR)(EGLDisplay dpy,
27    EGLenum type, const EGLint *attrib_list);
28typedef EGLBoolean EGLAPIENTRY (*TypeEglDestroySyncKHR)(EGLDisplay dpy,
29    EGLSyncKHR sync);
30typedef EGLint EGLAPIENTRY (*TypeEglClientWaitSyncKHR)(EGLDisplay dpy,
31    EGLSyncKHR sync, EGLint flags, EGLTimeKHR timeout);
32static TypeEglCreateSyncKHR FuncEglCreateSyncKHR = NULL;
33static TypeEglClientWaitSyncKHR FuncEglClientWaitSyncKHR = NULL;
34static TypeEglDestroySyncKHR FuncEglDestroySyncKHR = NULL;
35static bool initialized = false;
36static bool egl_khr_fence_sync_supported = false;
37
38bool IsEglKHRFenceSyncSupported() {
39  if (!initialized) {
40    EGLDisplay display = eglGetCurrentDisplay();
41    const char* eglExtensions = eglQueryString(eglGetCurrentDisplay(), EGL_EXTENSIONS);
42    if (eglExtensions && strstr(eglExtensions, "EGL_KHR_fence_sync")) {
43      FuncEglCreateSyncKHR = (TypeEglCreateSyncKHR) eglGetProcAddress("eglCreateSyncKHR");
44      FuncEglClientWaitSyncKHR = (TypeEglClientWaitSyncKHR) eglGetProcAddress("eglClientWaitSyncKHR");
45      FuncEglDestroySyncKHR = (TypeEglDestroySyncKHR) eglGetProcAddress("eglDestroySyncKHR");
46      if (FuncEglCreateSyncKHR != NULL && FuncEglClientWaitSyncKHR != NULL
47          && FuncEglDestroySyncKHR != NULL) {
48        egl_khr_fence_sync_supported = true;
49      }
50    }
51    initialized = true;
52  }
53  return egl_khr_fence_sync_supported;
54}
55
56void
57Java_com_android_gallery3d_photoeditor_FilterStack_nativeEglSetFenceAndWait(JNIEnv* env,
58                                                                          jobject thiz) {
59  if (!IsEglKHRFenceSyncSupported()) return;
60  EGLDisplay display = eglGetCurrentDisplay();
61
62  // Create a egl fence and wait for egl to return it.
63  // Additional reference on egl fence sync can be found in:
64  // http://www.khronos.org/registry/vg/extensions/KHR/EGL_KHR_fence_sync.txt
65  EGLSyncKHR fence = FuncEglCreateSyncKHR(display, EGL_SYNC_FENCE_KHR, NULL);
66  if (fence == EGL_NO_SYNC_KHR) {
67    return;
68  }
69
70  EGLint result = FuncEglClientWaitSyncKHR(display,
71                                       fence,
72                                       EGL_SYNC_FLUSH_COMMANDS_BIT_KHR,
73                                       EGL_FOREVER_KHR);
74  if (result == EGL_FALSE) {
75    ALOGE("EGL FENCE: error waiting for fence: %#x", eglGetError());
76  }
77  FuncEglDestroySyncKHR(display, fence);
78}
79