1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "ui/gl/gl_fence_egl.h" 6 7 #include "ui/gl/gl_bindings.h" 8 #include "ui/gl/gl_context.h" 9 10 namespace gfx { 11 12 GLFenceEGL::GLFenceEGL(bool flush) { 13 display_ = eglGetCurrentDisplay(); 14 sync_ = eglCreateSyncKHR(display_, EGL_SYNC_FENCE_KHR, NULL); 15 DCHECK(sync_ != EGL_NO_SYNC_KHR); 16 if (flush) { 17 glFlush(); 18 } else { 19 flush_event_ = GLContext::GetCurrent()->SignalFlush(); 20 } 21 } 22 23 bool GLFenceEGL::HasCompleted() { 24 EGLint value = 0; 25 if (eglGetSyncAttribKHR(display_, sync_, EGL_SYNC_STATUS_KHR, &value) != 26 EGL_TRUE) { 27 return true; 28 } 29 30 DCHECK(value == EGL_SIGNALED_KHR || value == EGL_UNSIGNALED_KHR); 31 return !value || value == EGL_SIGNALED_KHR; 32 } 33 34 void GLFenceEGL::ClientWait() { 35 if (!flush_event_.get() || flush_event_->IsSignaled()) { 36 EGLint flags = 0; 37 EGLTimeKHR time = EGL_FOREVER_KHR; 38 eglClientWaitSyncKHR(display_, sync_, flags, time); 39 } else { 40 LOG(ERROR) << "Trying to wait for uncommitted fence. Skipping..."; 41 } 42 } 43 44 void GLFenceEGL::ServerWait() { 45 if (!gfx::g_driver_egl.ext.b_EGL_KHR_wait_sync) { 46 ClientWait(); 47 return; 48 } 49 if (!flush_event_.get() || flush_event_->IsSignaled()) { 50 EGLint flags = 0; 51 eglWaitSyncKHR(display_, sync_, flags); 52 } else { 53 LOG(ERROR) << "Trying to wait for uncommitted fence. Skipping..."; 54 } 55 } 56 57 GLFenceEGL::~GLFenceEGL() { 58 eglDestroySyncKHR(display_, sync_); 59 } 60 61 } // namespace gfx 62
