ui/gl/gl_fence_egl.cc

   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/egl_util.h"
   8 #include "ui/gl/gl_bindings.h"
   9 #include "ui/gl/gl_context.h"
  10
  11 namespace gfx {
  12
  13 GLFenceEGL::GLFenceEGL(bool flush) {
  14   display_ = eglGetCurrentDisplay();
  15   sync_ = eglCreateSyncKHR(display_, EGL_SYNC_FENCE_KHR, NULL);
  16   DCHECK(sync_ != EGL_NO_SYNC_KHR);
  17   if (flush) {
  18     glFlush();
  19   } else {
  20     flush_event_ = GLContext::GetCurrent()->SignalFlush();
  21   }
  22 }
  23
  24 bool GLFenceEGL::HasCompleted() {
  25   EGLint value = 0;
  26   if (eglGetSyncAttribKHR(display_, sync_, EGL_SYNC_STATUS_KHR, &value) !=
  27       EGL_TRUE) {
  28     LOG(ERROR) << "Failed to get EGLSync attribute. error code:"
  29                << eglGetError();
  30     return true;
  31   }
  32
  33   DCHECK(value == EGL_SIGNALED_KHR || value == EGL_UNSIGNALED_KHR);
  34   return !value || value == EGL_SIGNALED_KHR;
  35 }
  36
  37 void GLFenceEGL::ClientWait() {
  38   if (!flush_event_.get() || flush_event_->IsSignaled()) {
  39     EGLint flags = 0;
  40     EGLTimeKHR time = EGL_FOREVER_KHR;
  41     EGLint result = eglClientWaitSyncKHR(display_, sync_, flags, time);
  42     DCHECK_NE(EGL_TIMEOUT_EXPIRED_KHR, result);
  43     if (result == EGL_FALSE) {
  44       LOG(FATAL) << "Failed to wait for EGLSync. error:"
  45                  << ui::GetLastEGLErrorString();
  46     }
  47   } else {
  48     LOG(ERROR) << "Trying to wait for uncommitted fence. Skipping...";
  49   }
  50 }
  51
  52 void GLFenceEGL::ServerWait() {
  53   if (!gfx::g_driver_egl.ext.b_EGL_KHR_wait_sync) {
  54     ClientWait();
  55     return;
  56   }
  57   if (!flush_event_.get() || flush_event_->IsSignaled()) {
  58     EGLint flags = 0;
  59     if (eglWaitSyncKHR(display_, sync_, flags) == EGL_FALSE) {
  60       LOG(FATAL) << "Failed to wait for EGLSync. error:"
  61                  << ui::GetLastEGLErrorString();
  62     }
  63   } else {
  64     LOG(ERROR) << "Trying to wait for uncommitted fence. Skipping...";
  65   }
  66 }
  67
  68 GLFenceEGL::~GLFenceEGL() {
  69   eglDestroySyncKHR(display_, sync_);
  70 }
  71
  72 }  // namespace gfx