/*
* Copyright (C) 2014 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 "EglManager.h"
#include <cutils/properties.h>
#include <log/log.h>
#include <private/gui/SyncFeatures.h>
#include <utils/Trace.h>
#include "utils/Color.h"
#include "utils/StringUtils.h"
#include "Frame.h"
#include "Properties.h"
#include <EGL/eglext.h>
#include <GLES/gl.h>
#include <gui/Surface.h>
#include <system/window.h>
#include <string>
#include <vector>
#define GLES_VERSION 2
// Android-specific addition that is used to show when frames began in systrace
EGLAPI void EGLAPIENTRY eglBeginFrame(EGLDisplay dpy, EGLSurface surface);
namespace android {
namespace uirenderer {
namespace renderthread {
#define ERROR_CASE(x) \
case x: \
return #x;
static const char* egl_error_str(EGLint error) {
switch (error) {
ERROR_CASE(EGL_SUCCESS)
ERROR_CASE(EGL_NOT_INITIALIZED)
ERROR_CASE(EGL_BAD_ACCESS)
ERROR_CASE(EGL_BAD_ALLOC)
ERROR_CASE(EGL_BAD_ATTRIBUTE)
ERROR_CASE(EGL_BAD_CONFIG)
ERROR_CASE(EGL_BAD_CONTEXT)
ERROR_CASE(EGL_BAD_CURRENT_SURFACE)
ERROR_CASE(EGL_BAD_DISPLAY)
ERROR_CASE(EGL_BAD_MATCH)
ERROR_CASE(EGL_BAD_NATIVE_PIXMAP)
ERROR_CASE(EGL_BAD_NATIVE_WINDOW)
ERROR_CASE(EGL_BAD_PARAMETER)
ERROR_CASE(EGL_BAD_SURFACE)
ERROR_CASE(EGL_CONTEXT_LOST)
default:
return "Unknown error";
}
}
const char* EglManager::eglErrorString() {
return egl_error_str(eglGetError());
}
static struct {
bool bufferAge = false;
bool setDamage = false;
bool noConfigContext = false;
bool pixelFormatFloat = false;
bool glColorSpace = false;
bool scRGB = false;
bool displayP3 = false;
bool contextPriority = false;
bool surfacelessContext = false;
} EglExtensions;
EglManager::EglManager()
: mEglDisplay(EGL_NO_DISPLAY)
, mEglConfig(nullptr)
, mEglConfigWideGamut(nullptr)
, mEglContext(EGL_NO_CONTEXT)
, mPBufferSurface(EGL_NO_SURFACE)
, mCurrentSurface(EGL_NO_SURFACE)
, mHasWideColorGamutSupport(false) {}
EglManager::~EglManager() {
if (hasEglContext()) {
ALOGW("~EglManager() leaked an EGL context");
}
}
void EglManager::initialize() {
if (hasEglContext()) return;
ATRACE_NAME("Creating EGLContext");
mEglDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
LOG_ALWAYS_FATAL_IF(mEglDisplay == EGL_NO_DISPLAY, "Failed to get EGL_DEFAULT_DISPLAY! err=%s",
eglErrorString());
EGLint major, minor;
LOG_ALWAYS_FATAL_IF(eglInitialize(mEglDisplay, &major, &minor) == EGL_FALSE,
"Failed to initialize display %p! err=%s", mEglDisplay, eglErrorString());
ALOGV("Initialized EGL, version %d.%d", (int)major, (int)minor);
initExtensions();
// Now that extensions are loaded, pick a swap behavior
if (Properties::enablePartialUpdates) {
// An Adreno driver bug is causing rendering problems for SkiaGL with
// buffer age swap behavior (b/31957043). To temporarily workaround,
// we will use preserved swap behavior.
if (Properties::useBufferAge && EglExtensions.bufferAge) {
mSwapBehavior = SwapBehavior::BufferAge;
} else {
mSwapBehavior = SwapBehavior::Preserved;
}
}
loadConfigs();
createContext();
createPBufferSurface();
makeCurrent(mPBufferSurface, nullptr, /* force */ true);
skcms_Matrix3x3 wideColorGamut;
LOG_ALWAYS_FATAL_IF(!DeviceInfo::get()->getWideColorSpace()->toXYZD50(&wideColorGamut),
"Could not get gamut matrix from wideColorSpace");
bool hasWideColorSpaceExtension = false;
if (memcmp(&wideColorGamut, &SkNamedGamut::kDCIP3, sizeof(wideColorGamut)) == 0) {
hasWideColorSpaceExtension = EglExtensions.displayP3;
} else if (memcmp(&wideColorGamut, &SkNamedGamut::kSRGB, sizeof(wideColorGamut)) == 0) {
hasWideColorSpaceExtension = EglExtensions.scRGB;
} else {
LOG_ALWAYS_FATAL("Unsupported wide color space.");
}
mHasWideColorGamutSupport = EglExtensions.glColorSpace && hasWideColorSpaceExtension &&
mEglConfigWideGamut != EGL_NO_CONFIG_KHR;
}
EGLConfig EglManager::load8BitsConfig(EGLDisplay display, EglManager::SwapBehavior swapBehavior) {
EGLint eglSwapBehavior =
(swapBehavior == SwapBehavior::Preserved) ? EGL_SWAP_BEHAVIOR_PRESERVED_BIT : 0;
EGLint attribs[] = {EGL_RENDERABLE_TYPE,
EGL_OPENGL_ES2_BIT,
EGL_RED_SIZE,
8,
EGL_GREEN_SIZE,
8,
EGL_BLUE_SIZE,
8,
EGL_ALPHA_SIZE,
8,
EGL_DEPTH_SIZE,
0,
EGL_CONFIG_CAVEAT,
EGL_NONE,
EGL_STENCIL_SIZE,
STENCIL_BUFFER_SIZE,
EGL_SURFACE_TYPE,
EGL_WINDOW_BIT | eglSwapBehavior,
EGL_NONE};
EGLConfig config = EGL_NO_CONFIG_KHR;
EGLint numConfigs = 1;
if (!eglChooseConfig(display, attribs, &config, numConfigs, &numConfigs) || numConfigs != 1) {
return EGL_NO_CONFIG_KHR;
}
return config;
}
EGLConfig EglManager::loadFP16Config(EGLDisplay display, SwapBehavior swapBehavior) {
EGLint eglSwapBehavior =
(swapBehavior == SwapBehavior::Preserved) ? EGL_SWAP_BEHAVIOR_PRESERVED_BIT : 0;
// If we reached this point, we have a valid swap behavior
EGLint attribs[] = {EGL_RENDERABLE_TYPE,
EGL_OPENGL_ES2_BIT,
EGL_COLOR_COMPONENT_TYPE_EXT,
EGL_COLOR_COMPONENT_TYPE_FLOAT_EXT,
EGL_RED_SIZE,
16,
EGL_GREEN_SIZE,
16,
EGL_BLUE_SIZE,
16,
EGL_ALPHA_SIZE,
16,
EGL_DEPTH_SIZE,
0,
EGL_STENCIL_SIZE,
STENCIL_BUFFER_SIZE,
EGL_SURFACE_TYPE,
EGL_WINDOW_BIT | eglSwapBehavior,
EGL_NONE};
EGLConfig config = EGL_NO_CONFIG_KHR;
EGLint numConfigs = 1;
if (!eglChooseConfig(display, attribs, &config, numConfigs, &numConfigs) || numConfigs != 1) {
return EGL_NO_CONFIG_KHR;
}
return config;
}
void EglManager::initExtensions() {
auto extensions = StringUtils::split(eglQueryString(mEglDisplay, EGL_EXTENSIONS));
// For our purposes we don't care if EGL_BUFFER_AGE is a result of
// EGL_EXT_buffer_age or EGL_KHR_partial_update as our usage is covered
// under EGL_KHR_partial_update and we don't need the expanded scope
// that EGL_EXT_buffer_age provides.
EglExtensions.bufferAge =
extensions.has("EGL_EXT_buffer_age") || extensions.has("EGL_KHR_partial_update");
EglExtensions.setDamage = extensions.has("EGL_KHR_partial_update");
LOG_ALWAYS_FATAL_IF(!extensions.has("EGL_KHR_swap_buffers_with_damage"),
"Missing required extension EGL_KHR_swap_buffers_with_damage");
EglExtensions.glColorSpace = extensions.has("EGL_KHR_gl_colorspace");
EglExtensions.noConfigContext = extensions.has("EGL_KHR_no_config_context");
EglExtensions.pixelFormatFloat = extensions.has("EGL_EXT_pixel_format_float");
EglExtensions.scRGB = extensions.has("EGL_EXT_gl_colorspace_scrgb");
EglExtensions.displayP3 = extensions.has("EGL_EXT_gl_colorspace_display_p3_passthrough");
EglExtensions.contextPriority = extensions.has("EGL_IMG_context_priority");
EglExtensions.surfacelessContext = extensions.has("EGL_KHR_surfaceless_context");
}
bool EglManager::hasEglContext() {
return mEglDisplay != EGL_NO_DISPLAY;
}
void EglManager::loadConfigs() {
// Note: The default pixel format is RGBA_8888, when other formats are
// available, we should check the target pixel format and configure the
// attributes list properly.
mEglConfig = load8BitsConfig(mEglDisplay, mSwapBehavior);
if (mEglConfig == EGL_NO_CONFIG_KHR) {
if (mSwapBehavior == SwapBehavior::Preserved) {
// Try again without dirty regions enabled
ALOGW("Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...");
mSwapBehavior = SwapBehavior::Discard;
mEglConfig = load8BitsConfig(mEglDisplay, mSwapBehavior);
} else {
// Failed to get a valid config
LOG_ALWAYS_FATAL("Failed to choose config, error = %s", eglErrorString());
}
}
SkColorType wideColorType = DeviceInfo::get()->getWideColorType();
// When we reach this point, we have a valid swap behavior
if (wideColorType == SkColorType::kRGBA_F16_SkColorType && EglExtensions.pixelFormatFloat) {
mEglConfigWideGamut = loadFP16Config(mEglDisplay, mSwapBehavior);
if (mEglConfigWideGamut == EGL_NO_CONFIG_KHR) {
ALOGE("Device claims wide gamut support, cannot find matching config, error = %s",
eglErrorString());
EglExtensions.pixelFormatFloat = false;
}
} else if (wideColorType == SkColorType::kN32_SkColorType) {
mEglConfigWideGamut = load8BitsConfig(mEglDisplay, mSwapBehavior);
}
}
void EglManager::createContext() {
std::vector<EGLint> contextAttributes;
contextAttributes.reserve(5);
contextAttributes.push_back(EGL_CONTEXT_CLIENT_VERSION);
contextAttributes.push_back(GLES_VERSION);
if (Properties::contextPriority != 0 && EglExtensions.contextPriority) {
contextAttributes.push_back(EGL_CONTEXT_PRIORITY_LEVEL_IMG);
contextAttributes.push_back(Properties::contextPriority);
}
contextAttributes.push_back(EGL_NONE);
mEglContext = eglCreateContext(
mEglDisplay, EglExtensions.noConfigContext ? ((EGLConfig) nullptr) : mEglConfig,
EGL_NO_CONTEXT, contextAttributes.data());
LOG_ALWAYS_FATAL_IF(mEglContext == EGL_NO_CONTEXT, "Failed to create context, error = %s",
eglErrorString());
}
void EglManager::createPBufferSurface() {
LOG_ALWAYS_FATAL_IF(mEglDisplay == EGL_NO_DISPLAY,
"usePBufferSurface() called on uninitialized GlobalContext!");
if (mPBufferSurface == EGL_NO_SURFACE && !EglExtensions.surfacelessContext) {
EGLint attribs[] = {EGL_WIDTH, 1, EGL_HEIGHT, 1, EGL_NONE};
mPBufferSurface = eglCreatePbufferSurface(mEglDisplay, mEglConfig, attribs);
}
}
Result<EGLSurface, EGLint> EglManager::createSurface(EGLNativeWindowType window,
ColorMode colorMode,
sk_sp<SkColorSpace> colorSpace) {
LOG_ALWAYS_FATAL_IF(!hasEglContext(), "Not initialized");
bool wideColorGamut = colorMode == ColorMode::WideColorGamut && mHasWideColorGamutSupport &&
EglExtensions.noConfigContext;
// The color space we want to use depends on whether linear blending is turned
// on and whether the app has requested wide color gamut rendering. When wide
// color gamut rendering is off, the app simply renders in the display's native
// color gamut.
//
// When wide gamut rendering is off:
// - Blending is done by default in gamma space, which requires using a
// linear EGL color space (the GPU uses the color values as is)
// - If linear blending is on, we must use the non-linear EGL color space
// (the GPU will perform sRGB to linear and linear to SRGB conversions
// before and after blending)
//
// When wide gamut rendering is on we cannot rely on the GPU performing
// linear blending for us. We use two different color spaces to tag the
// surface appropriately for SurfaceFlinger:
// - Gamma blending (default) requires the use of the non-linear color space
// - Linear blending requires the use of the linear color space
// Not all Android targets support the EGL_GL_COLORSPACE_KHR extension
// We insert to placeholders to set EGL_GL_COLORSPACE_KHR and its value.
// According to section 3.4.1 of the EGL specification, the attributes
// list is considered empty if the first entry is EGL_NONE
EGLint attribs[] = {EGL_NONE, EGL_NONE, EGL_NONE};
if (EglExtensions.glColorSpace) {
attribs[0] = EGL_GL_COLORSPACE_KHR;
if (wideColorGamut) {
skcms_Matrix3x3 colorGamut;
LOG_ALWAYS_FATAL_IF(!colorSpace->toXYZD50(&colorGamut),
"Could not get gamut matrix from color space");
if (memcmp(&colorGamut, &SkNamedGamut::kDCIP3, sizeof(colorGamut)) == 0) {
attribs[1] = EGL_GL_COLORSPACE_DISPLAY_P3_PASSTHROUGH_EXT;
} else if (memcmp(&colorGamut, &SkNamedGamut::kSRGB, sizeof(colorGamut)) == 0) {
attribs[1] = EGL_GL_COLORSPACE_SCRGB_EXT;
} else {
LOG_ALWAYS_FATAL("Unreachable: unsupported wide color space.");
}
} else {
attribs[1] = EGL_GL_COLORSPACE_LINEAR_KHR;
}
}
EGLSurface surface = eglCreateWindowSurface(
mEglDisplay, wideColorGamut ? mEglConfigWideGamut : mEglConfig, window, attribs);
if (surface == EGL_NO_SURFACE) {
return Error<EGLint>{eglGetError()};
}
if (mSwapBehavior != SwapBehavior::Preserved) {
LOG_ALWAYS_FATAL_IF(eglSurfaceAttrib(mEglDisplay, surface, EGL_SWAP_BEHAVIOR,
EGL_BUFFER_DESTROYED) == EGL_FALSE,
"Failed to set swap behavior to destroyed for window %p, eglErr = %s",
(void*)window, eglErrorString());
}
return surface;
}
void EglManager::destroySurface(EGLSurface surface) {
if (isCurrent(surface)) {
makeCurrent(EGL_NO_SURFACE);
}
if (!eglDestroySurface(mEglDisplay, surface)) {
ALOGW("Failed to destroy surface %p, error=%s", (void*)surface, eglErrorString());
}
}
void EglManager::destroy() {
if (mEglDisplay == EGL_NO_DISPLAY) return;
eglDestroyContext(mEglDisplay, mEglContext);
if (mPBufferSurface != EGL_NO_SURFACE) {
eglDestroySurface(mEglDisplay, mPBufferSurface);
}
eglMakeCurrent(mEglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
eglTerminate(mEglDisplay);
eglReleaseThread();
mEglDisplay = EGL_NO_DISPLAY;
mEglContext = EGL_NO_CONTEXT;
mPBufferSurface = EGL_NO_SURFACE;
mCurrentSurface = EGL_NO_SURFACE;
}
bool EglManager::makeCurrent(EGLSurface surface, EGLint* errOut, bool force) {
if (!force && isCurrent(surface)) return false;
if (surface == EGL_NO_SURFACE) {
// Ensure we always have a valid surface & context
surface = mPBufferSurface;
}
if (!eglMakeCurrent(mEglDisplay, surface, surface, mEglContext)) {
if (errOut) {
*errOut = eglGetError();
ALOGW("Failed to make current on surface %p, error=%s", (void*)surface,
egl_error_str(*errOut));
} else {
LOG_ALWAYS_FATAL("Failed to make current on surface %p, error=%s", (void*)surface,
eglErrorString());
}
}
mCurrentSurface = surface;
if (Properties::disableVsync) {
eglSwapInterval(mEglDisplay, 0);
}
return true;
}
EGLint EglManager::queryBufferAge(EGLSurface surface) {
switch (mSwapBehavior) {
case SwapBehavior::Discard:
return 0;
case SwapBehavior::Preserved:
return 1;
case SwapBehavior::BufferAge:
EGLint bufferAge;
eglQuerySurface(mEglDisplay, surface, EGL_BUFFER_AGE_EXT, &bufferAge);
return bufferAge;
}
return 0;
}
Frame EglManager::beginFrame(EGLSurface surface) {
LOG_ALWAYS_FATAL_IF(surface == EGL_NO_SURFACE, "Tried to beginFrame on EGL_NO_SURFACE!");
makeCurrent(surface);
Frame frame;
frame.mSurface = surface;
eglQuerySurface(mEglDisplay, surface, EGL_WIDTH, &frame.mWidth);
eglQuerySurface(mEglDisplay, surface, EGL_HEIGHT, &frame.mHeight);
frame.mBufferAge = queryBufferAge(surface);
eglBeginFrame(mEglDisplay, surface);
return frame;
}
void EglManager::damageFrame(const Frame& frame, const SkRect& dirty) {
#ifdef EGL_KHR_partial_update
if (EglExtensions.setDamage && mSwapBehavior == SwapBehavior::BufferAge) {
EGLint rects[4];
frame.map(dirty, rects);
if (!eglSetDamageRegionKHR(mEglDisplay, frame.mSurface, rects, 1)) {
LOG_ALWAYS_FATAL("Failed to set damage region on surface %p, error=%s",
(void*)frame.mSurface, eglErrorString());
}
}
#endif
}
bool EglManager::damageRequiresSwap() {
return EglExtensions.setDamage && mSwapBehavior == SwapBehavior::BufferAge;
}
bool EglManager::swapBuffers(const Frame& frame, const SkRect& screenDirty) {
if (CC_UNLIKELY(Properties::waitForGpuCompletion)) {
ATRACE_NAME("Finishing GPU work");
fence();
}
EGLint rects[4];
frame.map(screenDirty, rects);
eglSwapBuffersWithDamageKHR(mEglDisplay, frame.mSurface, rects, screenDirty.isEmpty() ? 0 : 1);
EGLint err = eglGetError();
if (CC_LIKELY(err == EGL_SUCCESS)) {
return true;
}
if (err == EGL_BAD_SURFACE || err == EGL_BAD_NATIVE_WINDOW) {
// For some reason our surface was destroyed out from under us
// This really shouldn't happen, but if it does we can recover easily
// by just not trying to use the surface anymore
ALOGW("swapBuffers encountered EGL error %d on %p, halting rendering...", err,
frame.mSurface);
return false;
}
LOG_ALWAYS_FATAL("Encountered EGL error %d %s during rendering", err, egl_error_str(err));
// Impossible to hit this, but the compiler doesn't know that
return false;
}
void EglManager::fence() {
EGLSyncKHR fence = eglCreateSyncKHR(mEglDisplay, EGL_SYNC_FENCE_KHR, NULL);
eglClientWaitSyncKHR(mEglDisplay, fence, EGL_SYNC_FLUSH_COMMANDS_BIT_KHR, EGL_FOREVER_KHR);
eglDestroySyncKHR(mEglDisplay, fence);
}
bool EglManager::setPreserveBuffer(EGLSurface surface, bool preserve) {
if (mSwapBehavior != SwapBehavior::Preserved) return false;
bool preserved = eglSurfaceAttrib(mEglDisplay, surface, EGL_SWAP_BEHAVIOR,
preserve ? EGL_BUFFER_PRESERVED : EGL_BUFFER_DESTROYED);
if (!preserved) {
ALOGW("Failed to set EGL_SWAP_BEHAVIOR on surface %p, error=%s", (void*)surface,
eglErrorString());
// Maybe it's already set?
EGLint swapBehavior;
if (eglQuerySurface(mEglDisplay, surface, EGL_SWAP_BEHAVIOR, &swapBehavior)) {
preserved = (swapBehavior == EGL_BUFFER_PRESERVED);
} else {
ALOGW("Failed to query EGL_SWAP_BEHAVIOR on surface %p, error=%p", (void*)surface,
eglErrorString());
}
}
return preserved;
}
status_t EglManager::fenceWait(sp<Fence>& fence) {
if (!hasEglContext()) {
ALOGE("EglManager::fenceWait: EGLDisplay not initialized");
return INVALID_OPERATION;
}
if (SyncFeatures::getInstance().useWaitSync() &&
SyncFeatures::getInstance().useNativeFenceSync()) {
// Block GPU on the fence.
// Create an EGLSyncKHR from the current fence.
int fenceFd = fence->dup();
if (fenceFd == -1) {
ALOGE("EglManager::fenceWait: error dup'ing fence fd: %d", errno);
return -errno;
}
EGLint attribs[] = {EGL_SYNC_NATIVE_FENCE_FD_ANDROID, fenceFd, EGL_NONE};
EGLSyncKHR sync = eglCreateSyncKHR(mEglDisplay, EGL_SYNC_NATIVE_FENCE_ANDROID, attribs);
if (sync == EGL_NO_SYNC_KHR) {
close(fenceFd);
ALOGE("EglManager::fenceWait: error creating EGL fence: %#x", eglGetError());
return UNKNOWN_ERROR;
}
// XXX: The spec draft is inconsistent as to whether this should
// return an EGLint or void. Ignore the return value for now, as
// it's not strictly needed.
eglWaitSyncKHR(mEglDisplay, sync, 0);
EGLint eglErr = eglGetError();
eglDestroySyncKHR(mEglDisplay, sync);
if (eglErr != EGL_SUCCESS) {
ALOGE("EglManager::fenceWait: error waiting for EGL fence: %#x", eglErr);
return UNKNOWN_ERROR;
}
} else {
// Block CPU on the fence.
status_t err = fence->waitForever("EglManager::fenceWait");
if (err != NO_ERROR) {
ALOGE("EglManager::fenceWait: error waiting for fence: %d", err);
return err;
}
}
return OK;
}
status_t EglManager::createReleaseFence(bool useFenceSync, EGLSyncKHR* eglFence,
sp<Fence>& nativeFence) {
if (!hasEglContext()) {
ALOGE("EglManager::createReleaseFence: EGLDisplay not initialized");
return INVALID_OPERATION;
}
if (SyncFeatures::getInstance().useNativeFenceSync()) {
EGLSyncKHR sync = eglCreateSyncKHR(mEglDisplay, EGL_SYNC_NATIVE_FENCE_ANDROID, nullptr);
if (sync == EGL_NO_SYNC_KHR) {
ALOGE("EglManager::createReleaseFence: error creating EGL fence: %#x", eglGetError());
return UNKNOWN_ERROR;
}
glFlush();
int fenceFd = eglDupNativeFenceFDANDROID(mEglDisplay, sync);
eglDestroySyncKHR(mEglDisplay, sync);
if (fenceFd == EGL_NO_NATIVE_FENCE_FD_ANDROID) {
ALOGE("EglManager::createReleaseFence: error dup'ing native fence "
"fd: %#x",
eglGetError());
return UNKNOWN_ERROR;
}
nativeFence = new Fence(fenceFd);
*eglFence = EGL_NO_SYNC_KHR;
} else if (useFenceSync && SyncFeatures::getInstance().useFenceSync()) {
if (*eglFence != EGL_NO_SYNC_KHR) {
// There is already a fence for the current slot. We need to
// wait on that before replacing it with another fence to
// ensure that all outstanding buffer accesses have completed
// before the producer accesses it.
EGLint result = eglClientWaitSyncKHR(mEglDisplay, *eglFence, 0, 1000000000);
if (result == EGL_FALSE) {
ALOGE("EglManager::createReleaseFence: error waiting for previous fence: %#x",
eglGetError());
return UNKNOWN_ERROR;
} else if (result == EGL_TIMEOUT_EXPIRED_KHR) {
ALOGE("EglManager::createReleaseFence: timeout waiting for previous fence");
return TIMED_OUT;
}
eglDestroySyncKHR(mEglDisplay, *eglFence);
}
// Create a fence for the outstanding accesses in the current
// OpenGL ES context.
*eglFence = eglCreateSyncKHR(mEglDisplay, EGL_SYNC_FENCE_KHR, nullptr);
if (*eglFence == EGL_NO_SYNC_KHR) {
ALOGE("EglManager::createReleaseFence: error creating fence: %#x", eglGetError());
return UNKNOWN_ERROR;
}
glFlush();
}
return OK;
}
} /* namespace renderthread */
} /* namespace uirenderer */
} /* namespace android */