EGLSyncTest.cpp

//
// Copyright 2019 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// EGLSyncTest.cpp:
//   Tests of EGL_KHR_fence_sync and EGL_KHR_wait_sync extensions.

#include <gtest/gtest.h>

#include "test_utils/ANGLETest.h"
#include "test_utils/angle_test_configs.h"
#include "util/EGLWindow.h"

using namespace angle;

class EGLSyncTest : public ANGLETest
{
  protected:
    bool hasFenceSyncExtension() const
    {
        return IsEGLDisplayExtensionEnabled(getEGLWindow()->getDisplay(), "EGL_KHR_fence_sync");
    }
    bool hasWaitSyncExtension() const
    {
        return hasFenceSyncExtension() &&
               IsEGLDisplayExtensionEnabled(getEGLWindow()->getDisplay(), "EGL_KHR_wait_sync");
    }
    bool hasGLSyncExtension() const { return IsGLExtensionEnabled("GL_OES_EGL_sync"); }

    bool hasAndroidNativeFenceSyncExtension() const
    {
        return IsEGLDisplayExtensionEnabled(getEGLWindow()->getDisplay(),
                                            "EGL_ANDROID_native_fence_sync");
    }
};

// Test error cases for all EGL_KHR_fence_sync functions
TEST_P(EGLSyncTest, FenceSyncErrors)
{
    ANGLE_SKIP_TEST_IF(!hasFenceSyncExtension());

    EGLDisplay display = getEGLWindow()->getDisplay();

    // If the client API doesn't have the necessary extension, test that sync creation fails and
    // ignore the rest of the tests.
    if (!hasGLSyncExtension())
    {
        EXPECT_EQ(EGL_NO_SYNC_KHR, eglCreateSyncKHR(display, EGL_SYNC_FENCE_KHR, nullptr));
        EXPECT_EGL_ERROR(EGL_BAD_MATCH);
    }

    ANGLE_SKIP_TEST_IF(!hasGLSyncExtension());

    EGLContext context     = eglGetCurrentContext();
    EGLSurface drawSurface = eglGetCurrentSurface(EGL_DRAW);
    EGLSurface readSurface = eglGetCurrentSurface(EGL_READ);

    EXPECT_NE(context, EGL_NO_CONTEXT);
    EXPECT_NE(drawSurface, EGL_NO_SURFACE);
    EXPECT_NE(readSurface, EGL_NO_SURFACE);

    // CreateSync with no attribute shouldn't cause an error
    EGLSyncKHR sync = eglCreateSyncKHR(display, EGL_SYNC_FENCE_KHR, nullptr);
    EXPECT_NE(sync, EGL_NO_SYNC_KHR);

    EXPECT_EGL_TRUE(eglDestroySyncKHR(display, sync));

    // CreateSync with empty attribute shouldn't cause an error
    const EGLint emptyAttributes[] = {EGL_NONE};
    sync                           = eglCreateSyncKHR(display, EGL_SYNC_FENCE_KHR, emptyAttributes);
    EXPECT_NE(sync, EGL_NO_SYNC_KHR);

    // DestroySync generates BAD_PARAMETER if the sync is not valid
    EXPECT_EGL_FALSE(eglDestroySyncKHR(display, reinterpret_cast<EGLSyncKHR>(20)));
    EXPECT_EGL_ERROR(EGL_BAD_PARAMETER);

    // CreateSync generates BAD_DISPLAY if display is not valid
    EXPECT_EQ(EGL_NO_SYNC_KHR, eglCreateSyncKHR(EGL_NO_DISPLAY, EGL_SYNC_FENCE_KHR, nullptr));
    EXPECT_EGL_ERROR(EGL_BAD_DISPLAY);

    // CreateSync generates BAD_ATTRIBUTE if attribute is neither nullptr nor empty.
    const EGLint nonEmptyAttributes[] = {
        EGL_CL_EVENT_HANDLE,
        0,
        EGL_NONE,
    };
    EXPECT_EQ(EGL_NO_SYNC_KHR, eglCreateSyncKHR(display, EGL_SYNC_FENCE_KHR, nonEmptyAttributes));
    EXPECT_EGL_ERROR(EGL_BAD_ATTRIBUTE);

    // CreateSync generates BAD_ATTRIBUTE if type is not valid
    EXPECT_EQ(EGL_NO_SYNC_KHR, eglCreateSyncKHR(display, 0, nullptr));
    EXPECT_EGL_ERROR(EGL_BAD_ATTRIBUTE);

    // CreateSync generates BAD_MATCH if no context is current
    eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
    EXPECT_EQ(EGL_NO_SYNC_KHR, eglCreateSyncKHR(display, EGL_SYNC_FENCE_KHR, nullptr));
    EXPECT_EGL_ERROR(EGL_BAD_MATCH);
    eglMakeCurrent(display, drawSurface, readSurface, context);

    // ClientWaitSync generates EGL_BAD_PARAMETER if the sync object is not valid
    EXPECT_EGL_FALSE(eglClientWaitSyncKHR(display, reinterpret_cast<EGLSyncKHR>(30), 0, 0));
    EXPECT_EGL_ERROR(EGL_BAD_PARAMETER);

    // GetSyncAttrib generates EGL_BAD_PARAMETER if the sync object is not valid, and value is not
    // modified
    constexpr EGLint kSentinelAttribValue = 123456789;
    EGLint attribValue                    = kSentinelAttribValue;
    EXPECT_EGL_FALSE(eglGetSyncAttribKHR(display, reinterpret_cast<EGLSyncKHR>(40),
                                         EGL_SYNC_TYPE_KHR, &attribValue));
    EXPECT_EGL_ERROR(EGL_BAD_PARAMETER);
    EXPECT_EQ(attribValue, kSentinelAttribValue);

    // GetSyncAttrib generates EGL_BAD_ATTRIBUTE if the attribute is not valid, and value is not
    // modified
    EXPECT_EGL_FALSE(eglGetSyncAttribKHR(display, sync, EGL_CL_EVENT_HANDLE, &attribValue));
    EXPECT_EGL_ERROR(EGL_BAD_ATTRIBUTE);
    EXPECT_EQ(attribValue, kSentinelAttribValue);

    // GetSyncAttrib generates EGL_BAD_MATCH if the attribute is valid for sync, but not the
    // particular sync type. We don't have such a case at the moment.

    EXPECT_EGL_TRUE(eglDestroySyncKHR(display, sync));
}

// Test error cases for all EGL_KHR_wait_sync functions
TEST_P(EGLSyncTest, WaitSyncErrors)
{
    // The client API that shows support for eglWaitSyncKHR is the same as the one required for
    // eglCreateSyncKHR.  As such, there is no way to create a sync and not be able to wait on it.
    // This would have created an EGL_BAD_MATCH error.
    ANGLE_SKIP_TEST_IF(!hasWaitSyncExtension() || !hasGLSyncExtension());

    EGLDisplay display     = getEGLWindow()->getDisplay();
    EGLContext context     = eglGetCurrentContext();
    EGLSurface drawSurface = eglGetCurrentSurface(EGL_DRAW);
    EGLSurface readSurface = eglGetCurrentSurface(EGL_READ);

    EXPECT_NE(context, EGL_NO_CONTEXT);
    EXPECT_NE(drawSurface, EGL_NO_SURFACE);
    EXPECT_NE(readSurface, EGL_NO_SURFACE);

    EGLSyncKHR sync = eglCreateSyncKHR(display, EGL_SYNC_FENCE_KHR, nullptr);
    EXPECT_NE(sync, EGL_NO_SYNC_KHR);

    // WaitSync generates BAD_MATCH if no context is current
    eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
    EXPECT_EGL_FALSE(eglWaitSyncKHR(display, sync, 0));
    EXPECT_EGL_ERROR(EGL_BAD_MATCH);
    eglMakeCurrent(display, drawSurface, readSurface, context);

    // WaitSync generates BAD_PARAMETER if the sync is not valid
    EXPECT_EGL_FALSE(eglWaitSyncKHR(display, reinterpret_cast<EGLSyncKHR>(20), 0));
    EXPECT_EGL_ERROR(EGL_BAD_PARAMETER);

    // WaitSync generates BAD_PARAMETER if flags is non-zero
    EXPECT_EGL_FALSE(eglWaitSyncKHR(display, sync, 1));
    EXPECT_EGL_ERROR(EGL_BAD_PARAMETER);

    EXPECT_EGL_TRUE(eglDestroySyncKHR(display, sync));
}

// Test usage of eglGetSyncAttribKHR
TEST_P(EGLSyncTest, GetSyncAttrib)
{
    ANGLE_SKIP_TEST_IF(!hasFenceSyncExtension() || !hasGLSyncExtension());

    EGLDisplay display = getEGLWindow()->getDisplay();

    EGLSyncKHR sync = eglCreateSyncKHR(display, EGL_SYNC_FENCE_KHR, nullptr);
    EXPECT_NE(sync, EGL_NO_SYNC_KHR);

    // Fence sync attributes are:
    //
    // EGL_SYNC_TYPE_KHR: EGL_SYNC_FENCE_KHR
    // EGL_SYNC_STATUS_KHR: EGL_UNSIGNALED_KHR or EGL_SIGNALED_KHR
    // EGL_SYNC_CONDITION_KHR: EGL_SYNC_PRIOR_COMMANDS_COMPLETE_KHR

    constexpr EGLint kSentinelAttribValue = 123456789;
    EGLint attribValue                    = kSentinelAttribValue;
    EXPECT_EGL_TRUE(eglGetSyncAttribKHR(display, sync, EGL_SYNC_TYPE_KHR, &attribValue));
    EXPECT_EQ(attribValue, EGL_SYNC_FENCE_KHR);

    attribValue = kSentinelAttribValue;
    EXPECT_EGL_TRUE(eglGetSyncAttribKHR(display, sync, EGL_SYNC_CONDITION_KHR, &attribValue));
    EXPECT_EQ(attribValue, EGL_SYNC_PRIOR_COMMANDS_COMPLETE_KHR);

    attribValue = kSentinelAttribValue;
    EXPECT_EGL_TRUE(eglGetSyncAttribKHR(display, sync, EGL_SYNC_STATUS_KHR, &attribValue));

    // Hack around EXPECT_* not having an "either this or that" variant:
    if (attribValue != EGL_SIGNALED_KHR)
    {
        EXPECT_EQ(attribValue, EGL_UNSIGNALED_KHR);
    }

    EXPECT_EGL_TRUE(eglDestroySyncKHR(display, sync));
}

// Test that basic usage works and doesn't generate errors or crash
TEST_P(EGLSyncTest, BasicOperations)
{
    ANGLE_SKIP_TEST_IF(!hasFenceSyncExtension() || !hasGLSyncExtension());

    EGLDisplay display = getEGLWindow()->getDisplay();

    EGLSyncKHR sync = eglCreateSyncKHR(display, EGL_SYNC_FENCE_KHR, nullptr);
    EXPECT_NE(sync, EGL_NO_SYNC_KHR);

    glClearColor(1.0f, 0.0f, 1.0f, 1.0f);

    glClear(GL_COLOR_BUFFER_BIT);
    EXPECT_EGL_TRUE(eglWaitSyncKHR(display, sync, 0));

    glFlush();

    glClear(GL_COLOR_BUFFER_BIT);

    // Don't wait forever to make sure the test terminates
    constexpr GLuint64 kTimeout = 1'000'000'000;  // 1 second
    EGLint value                = 0;
    ASSERT_EQ(EGL_CONDITION_SATISFIED_KHR,
              eglClientWaitSyncKHR(display, sync, EGL_SYNC_FLUSH_COMMANDS_BIT_KHR, kTimeout));

    for (size_t i = 0; i < 20; i++)
    {
        glClear(GL_COLOR_BUFFER_BIT);
        EXPECT_EQ(
            EGL_CONDITION_SATISFIED_KHR,
            eglClientWaitSyncKHR(display, sync, EGL_SYNC_FLUSH_COMMANDS_BIT_KHR, EGL_FOREVER_KHR));
        EXPECT_EGL_TRUE(eglGetSyncAttribKHR(display, sync, EGL_SYNC_STATUS_KHR, &value));
        EXPECT_EQ(value, EGL_SIGNALED_KHR);
    }

    EXPECT_EGL_TRUE(eglDestroySyncKHR(display, sync));
}

// Test eglWaitClient api
TEST_P(EGLSyncTest, WaitClient)
{
    // Clear to red color
    glClearColor(1.0f, 0.0f, 0.0f, 1.0f);

    glClear(GL_COLOR_BUFFER_BIT);
    EXPECT_EGL_TRUE(eglWaitClient());
    EXPECT_PIXEL_COLOR_EQ(getWindowWidth() / 2, getWindowHeight() / 2, GLColor::red);

    EGLDisplay display = getEGLWindow()->getDisplay();
    EGLContext context = getEGLWindow()->getContext();
    EGLSurface surface = getEGLWindow()->getSurface();
    eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
    EXPECT_EGL_TRUE(eglWaitClient());
    eglMakeCurrent(display, surface, surface, context);
}

// Test eglWaitGL api
TEST_P(EGLSyncTest, WaitGL)
{
    // Clear to red color
    glClearColor(1.0f, 0.0f, 0.0f, 1.0f);

    glClear(GL_COLOR_BUFFER_BIT);
    EXPECT_EGL_TRUE(eglWaitGL());
    EXPECT_PIXEL_COLOR_EQ(getWindowWidth() / 2, getWindowHeight() / 2, GLColor::red);

    EGLDisplay display = getEGLWindow()->getDisplay();
    EGLContext context = getEGLWindow()->getContext();
    EGLSurface surface = getEGLWindow()->getSurface();
    eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
    EXPECT_EGL_TRUE(eglWaitGL());
    eglMakeCurrent(display, surface, surface, context);
}

// Test eglWaitNative api
TEST_P(EGLSyncTest, WaitNative)
{
    // Clear to red color
    glClearColor(1.0f, 0.0f, 0.0f, 1.0f);

    glClear(GL_COLOR_BUFFER_BIT);
    EXPECT_EGL_TRUE(eglWaitNative(EGL_CORE_NATIVE_ENGINE));
    EXPECT_PIXEL_COLOR_EQ(getWindowWidth() / 2, getWindowHeight() / 2, GLColor::red);

    EGLDisplay display = getEGLWindow()->getDisplay();
    EGLContext context = getEGLWindow()->getContext();
    EGLSurface surface = getEGLWindow()->getSurface();
    eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
    EXPECT_EGL_TRUE(eglWaitNative(EGL_CORE_NATIVE_ENGINE));
    eglMakeCurrent(display, surface, surface, context);
}

// Verify eglDupNativeFence for EGL_ANDROID_native_fence_sync
TEST_P(EGLSyncTest, AndroidNativeFence_DupNativeFenceFD)
{
    ANGLE_SKIP_TEST_IF(!hasFenceSyncExtension());
    ANGLE_SKIP_TEST_IF(!hasFenceSyncExtension() || !hasGLSyncExtension());
    ANGLE_SKIP_TEST_IF(!hasAndroidNativeFenceSyncExtension());

    EGLDisplay display = getEGLWindow()->getDisplay();

    // We can ClientWait on this
    EGLSyncKHR syncWithGeneratedFD =
        eglCreateSyncKHR(display, EGL_SYNC_NATIVE_FENCE_ANDROID, nullptr);
    EXPECT_NE(syncWithGeneratedFD, EGL_NO_SYNC_KHR);

    int fd = eglDupNativeFenceFDANDROID(display, syncWithGeneratedFD);
    EXPECT_EGL_SUCCESS();

    // Clean up created objects.
    if (fd != EGL_NO_NATIVE_FENCE_FD_ANDROID)
    {
        close(fd);
    }

    EXPECT_EGL_TRUE(eglDestroySyncKHR(display, syncWithGeneratedFD));
}

// Verify CreateSync and ClientWait for EGL_ANDROID_native_fence_sync
TEST_P(EGLSyncTest, AndroidNativeFence_ClientWait)
{
    ANGLE_SKIP_TEST_IF(!hasFenceSyncExtension());
    ANGLE_SKIP_TEST_IF(!hasFenceSyncExtension() || !hasGLSyncExtension());
    ANGLE_SKIP_TEST_IF(!hasAndroidNativeFenceSyncExtension());

    EGLint value       = 0;
    EGLDisplay display = getEGLWindow()->getDisplay();

    // We can ClientWait on this
    EGLSyncKHR syncWithGeneratedFD =
        eglCreateSyncKHR(display, EGL_SYNC_NATIVE_FENCE_ANDROID, nullptr);
    EXPECT_NE(syncWithGeneratedFD, EGL_NO_SYNC_KHR);

    // Create work to do
    glClearColor(0.0f, 1.0f, 0.0f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT);
    glFlush();

    // Wait for draw to complete
    EXPECT_EQ(EGL_CONDITION_SATISFIED,
              eglClientWaitSyncKHR(display, syncWithGeneratedFD, EGL_SYNC_FLUSH_COMMANDS_BIT_KHR,
                                   1000000000));
    EXPECT_EGL_TRUE(eglGetSyncAttribKHR(display, syncWithGeneratedFD, EGL_SYNC_STATUS_KHR, &value));
    EXPECT_EQ(value, EGL_SIGNALED_KHR);

    // Clean up created objects.
    EXPECT_EGL_TRUE(eglDestroySyncKHR(display, syncWithGeneratedFD));
}

// Verify WaitSync with EGL_ANDROID_native_fence_sync
// Simulate passing FDs across processes by passing across Contexts.
TEST_P(EGLSyncTest, AndroidNativeFence_WaitSync)
{
    ANGLE_SKIP_TEST_IF(!hasFenceSyncExtension());
    ANGLE_SKIP_TEST_IF(!hasWaitSyncExtension() || !hasGLSyncExtension());
    ANGLE_SKIP_TEST_IF(!hasAndroidNativeFenceSyncExtension());

    EGLint value       = 0;
    EGLDisplay display = getEGLWindow()->getDisplay();
    EGLSurface surface = getEGLWindow()->getSurface();

    /*- First Context ------------------------*/

    // We can ClientWait on this
    EGLSyncKHR syncWithGeneratedFD =
        eglCreateSyncKHR(display, EGL_SYNC_NATIVE_FENCE_ANDROID, nullptr);
    EXPECT_NE(syncWithGeneratedFD, EGL_NO_SYNC_KHR);

    int fd = eglDupNativeFenceFDANDROID(display, syncWithGeneratedFD);
    EXPECT_EGL_SUCCESS();  // Can return -1 (when signaled) or valid FD.

    // Create work to do
    glClearColor(0.0f, 1.0f, 0.0f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT);
    glFlush();

    /*- Second Context ------------------------*/
    if (fd > EGL_NO_NATIVE_FENCE_FD_ANDROID)
    {
        EXPECT_EGL_TRUE(eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT));

        EGLContext context2 = getEGLWindow()->createContext(EGL_NO_CONTEXT);
        EXPECT_EGL_TRUE(eglMakeCurrent(display, surface, surface, context2));

        // We can eglWaitSync on this - import FD from first sync.
        EGLint syncAttribs[] = {EGL_SYNC_NATIVE_FENCE_FD_ANDROID, (EGLint)fd, EGL_NONE};
        EGLSyncKHR syncWithDupFD =
            eglCreateSyncKHR(display, EGL_SYNC_NATIVE_FENCE_ANDROID, syncAttribs);
        EXPECT_NE(syncWithDupFD, EGL_NO_SYNC_KHR);

        // Second draw waits for first to complete. May already be signaled - ignore error.
        if (eglWaitSyncKHR(display, syncWithDupFD, 0) == EGL_TRUE)
        {
            // Create work to do
            glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
            glClear(GL_COLOR_BUFFER_BIT);
            glFlush();
        }

        // Wait for second draw to complete
        EXPECT_EQ(EGL_CONDITION_SATISFIED,
                  eglClientWaitSyncKHR(display, syncWithDupFD, EGL_SYNC_FLUSH_COMMANDS_BIT_KHR,
                                       1000000000));
        EXPECT_EGL_TRUE(eglGetSyncAttribKHR(display, syncWithDupFD, EGL_SYNC_STATUS_KHR, &value));
        EXPECT_EQ(value, EGL_SIGNALED_KHR);

        // Reset to default context and surface.
        EXPECT_EGL_TRUE(eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT));
        EXPECT_EGL_TRUE(eglMakeCurrent(display, surface, surface, getEGLWindow()->getContext()));

        // Clean up created objects.
        EXPECT_EGL_TRUE(eglDestroySyncKHR(display, syncWithDupFD));
        EXPECT_EGL_TRUE(eglDestroyContext(display, context2));
    }

    // Wait for first draw to complete
    EXPECT_EQ(EGL_CONDITION_SATISFIED,
              eglClientWaitSyncKHR(display, syncWithGeneratedFD, EGL_SYNC_FLUSH_COMMANDS_BIT_KHR,
                                   1000000000));
    EXPECT_EGL_TRUE(eglGetSyncAttribKHR(display, syncWithGeneratedFD, EGL_SYNC_STATUS_KHR, &value));
    EXPECT_EQ(value, EGL_SIGNALED_KHR);

    // Clean up created objects.
    EXPECT_EGL_TRUE(eglDestroySyncKHR(display, syncWithGeneratedFD));
}

// Verify EGL_ANDROID_native_fence_sync
// Simulate passing FDs across processes by passing across Contexts.
TEST_P(EGLSyncTest, AndroidNativeFence_withFences)
{
    ANGLE_SKIP_TEST_IF(!hasFenceSyncExtension());
    ANGLE_SKIP_TEST_IF(!hasWaitSyncExtension() || !hasGLSyncExtension());
    ANGLE_SKIP_TEST_IF(!hasAndroidNativeFenceSyncExtension());

    EGLint value       = 0;
    EGLDisplay display = getEGLWindow()->getDisplay();
    EGLSurface surface = getEGLWindow()->getSurface();

    /*- First Context ------------------------*/

    // Extra fence syncs to ensure that Fence and Android Native fences work together
    EGLSyncKHR syncFence1 = eglCreateSyncKHR(display, EGL_SYNC_FENCE_KHR, nullptr);
    EXPECT_NE(syncFence1, EGL_NO_SYNC_KHR);

    // We can ClientWait on this
    EGLSyncKHR syncWithGeneratedFD =
        eglCreateSyncKHR(display, EGL_SYNC_NATIVE_FENCE_ANDROID, nullptr);
    EXPECT_NE(syncWithGeneratedFD, EGL_NO_SYNC_KHR);

    int fd = eglDupNativeFenceFDANDROID(display, syncWithGeneratedFD);
    EXPECT_EGL_SUCCESS();  // Can return -1 (when signaled) or valid FD.

    EGLSyncKHR syncFence2 = eglCreateSyncKHR(display, EGL_SYNC_FENCE_KHR, nullptr);
    EXPECT_NE(syncFence2, EGL_NO_SYNC_KHR);

    // Create work to do
    glClearColor(0.0f, 1.0f, 0.0f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT);
    glFlush();

    /*- Second Context ------------------------*/
    if (fd > EGL_NO_NATIVE_FENCE_FD_ANDROID)
    {
        EXPECT_EGL_TRUE(eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT));

        EGLContext context2 = getEGLWindow()->createContext(EGL_NO_CONTEXT);
        EXPECT_EGL_TRUE(eglMakeCurrent(display, surface, surface, context2));

        // check that Fence and Android fences work together
        EGLSyncKHR syncFence3 = eglCreateSyncKHR(display, EGL_SYNC_FENCE_KHR, nullptr);
        EXPECT_NE(syncFence3, EGL_NO_SYNC_KHR);

        // We can eglWaitSync on this
        EGLint syncAttribs[] = {EGL_SYNC_NATIVE_FENCE_FD_ANDROID, (EGLint)fd, EGL_NONE};
        EGLSyncKHR syncWithDupFD =
            eglCreateSyncKHR(display, EGL_SYNC_NATIVE_FENCE_ANDROID, syncAttribs);
        EXPECT_NE(syncWithDupFD, EGL_NO_SYNC_KHR);

        EGLSyncKHR syncFence4 = eglCreateSyncKHR(display, EGL_SYNC_FENCE_KHR, nullptr);
        EXPECT_NE(syncFence4, EGL_NO_SYNC_KHR);

        // Second draw waits for first to complete. May already be signaled - ignore error.
        if (eglWaitSyncKHR(display, syncWithDupFD, 0) == EGL_TRUE)
        {
            // Create work to do
            glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
            glClear(GL_COLOR_BUFFER_BIT);
            glFlush();
        }

        // Wait for second draw to complete
        EXPECT_EQ(EGL_CONDITION_SATISFIED,
                  eglClientWaitSyncKHR(display, syncWithDupFD, EGL_SYNC_FLUSH_COMMANDS_BIT_KHR,
                                       1000000000));
        EXPECT_EGL_TRUE(eglGetSyncAttribKHR(display, syncWithDupFD, EGL_SYNC_STATUS_KHR, &value));
        EXPECT_EQ(value, EGL_SIGNALED_KHR);

        // Reset to default context and surface.
        EXPECT_EGL_TRUE(eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT));
        EXPECT_EGL_TRUE(eglMakeCurrent(display, surface, surface, getEGLWindow()->getContext()));

        // Clean up created objects.
        EXPECT_EGL_TRUE(eglDestroySyncKHR(display, syncFence3));
        EXPECT_EGL_TRUE(eglDestroySyncKHR(display, syncFence4));
        EXPECT_EGL_TRUE(eglDestroySyncKHR(display, syncWithDupFD));
        EXPECT_EGL_TRUE(eglDestroyContext(display, context2));
    }

    // Wait for first draw to complete
    EXPECT_EQ(EGL_CONDITION_SATISFIED,
              eglClientWaitSyncKHR(display, syncWithGeneratedFD, EGL_SYNC_FLUSH_COMMANDS_BIT_KHR,
                                   1000000000));
    EXPECT_EGL_TRUE(eglGetSyncAttribKHR(display, syncWithGeneratedFD, EGL_SYNC_STATUS_KHR, &value));
    EXPECT_EQ(value, EGL_SIGNALED_KHR);

    // Clean up created objects.
    EXPECT_EGL_TRUE(eglDestroySyncKHR(display, syncFence1));
    EXPECT_EGL_TRUE(eglDestroySyncKHR(display, syncFence2));
    EXPECT_EGL_TRUE(eglDestroySyncKHR(display, syncWithGeneratedFD));
}

ANGLE_INSTANTIATE_TEST_ES2_AND_ES3(EGLSyncTest);