Implement GLX for Ozone X11.

ui/gl/gl_surface_glx_x11.cc

+// Copyright 2016 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_surface_glx_x11.h"
+
+#include <X11/Xlib.h>
+
+#include "ui/events/platform/platform_event_source.h"
+#include "ui/gfx/x/x11_types.h"
+
+namespace gl {
+
+GLSurfaceGLXX11::GLSurfaceGLXX11(gfx::AcceleratedWidget window)
+    : NativeViewGLSurfaceGLX(window) {}
+
+GLSurfaceGLXX11::~GLSurfaceGLXX11() {
+  Destroy();
+}
+
+void GLSurfaceGLXX11::RegisterEvents() {
+  auto* event_source = ui::PlatformEventSource::GetInstance();
+  // Can be null in tests, when we don't care about Exposes.
+  if (event_source) {
+    XSelectInput(gfx::GetXDisplay(), window(), ExposureMask);
+    event_source->AddPlatformEventDispatcher(this);
+  }
+}
+
+void GLSurfaceGLXX11::UnregisterEvents() {
+  auto* event_source = ui::PlatformEventSource::GetInstance();
+  if (event_source)
+    event_source->RemovePlatformEventDispatcher(this);
+}
+
+bool GLSurfaceGLXX11::CanDispatchEvent(const ui::PlatformEvent& event) {
+  return CanHandleEvent(event);
+}
+
+uint32_t GLSurfaceGLXX11::DispatchEvent(const ui::PlatformEvent& event) {
+  ForwardExposeEvent(event);
+  return ui::POST_DISPATCH_STOP_PROPAGATION;
+}
+
+}  // namespace gl