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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gl/gl_fence_egl.h"
#include "ui/gl/egl_util.h"
#include "ui/gl/gl_bindings.h"
#include "ui/gl/gl_context.h"
namespace gfx {
GLFenceEGL::GLFenceEGL(bool flush) {
display_ = eglGetCurrentDisplay();
sync_ = eglCreateSyncKHR(display_, EGL_SYNC_FENCE_KHR, NULL);
DCHECK(sync_ != EGL_NO_SYNC_KHR);
if (flush) {
glFlush();
} else {
flush_event_ = GLContext::GetCurrent()->SignalFlush();
}
}
bool GLFenceEGL::HasCompleted() {
EGLint value = 0;
if (eglGetSyncAttribKHR(display_, sync_, EGL_SYNC_STATUS_KHR, &value) !=
EGL_TRUE) {
LOG(ERROR) << "Failed to get EGLSync attribute. error code:"
<< eglGetError();
return true;
}
DCHECK(value == EGL_SIGNALED_KHR || value == EGL_UNSIGNALED_KHR);
return !value || value == EGL_SIGNALED_KHR;
}
void GLFenceEGL::ClientWait() {
if (!flush_event_.get() || flush_event_->IsSignaled()) {
EGLint flags = 0;
EGLTimeKHR time = EGL_FOREVER_KHR;
EGLint result = eglClientWaitSyncKHR(display_, sync_, flags, time);
DCHECK_NE(EGL_TIMEOUT_EXPIRED_KHR, result);
if (result == EGL_FALSE) {
LOG(FATAL) << "Failed to wait for EGLSync. error:"
<< ui::GetLastEGLErrorString();
}
} else {
LOG(ERROR) << "Trying to wait for uncommitted fence. Skipping...";
}
}
void GLFenceEGL::ServerWait() {
if (!gfx::g_driver_egl.ext.b_EGL_KHR_wait_sync) {
ClientWait();
return;
}
if (!flush_event_.get() || flush_event_->IsSignaled()) {
EGLint flags = 0;
if (eglWaitSyncKHR(display_, sync_, flags) == EGL_FALSE) {
LOG(FATAL) << "Failed to wait for EGLSync. error:"
<< ui::GetLastEGLErrorString();
}
} else {
LOG(ERROR) << "Trying to wait for uncommitted fence. Skipping...";
}
}
GLFenceEGL::~GLFenceEGL() {
eglDestroySyncKHR(display_, sync_);
}
} // namespace gfx
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