Use EXT_robustness where available on GLES2 platforms to detect and respond to resets of the graphi…

ui/gl/gl_surface_egl.cc

 // Copyright (c) 2012 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_egl.h"
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "build/build_config.h"
 #include "third_party/angle/include/EGL/egl.h"
 #include "third_party/angle/include/EGL/eglext.h"
 #include "ui/gl/egl_util.h"
 #include "ui/gl/gl_context.h"
 
 // This header must come after the above third-party include, as
 // it brings in #defines that cause conflicts.
 #include "ui/gl/gl_bindings.h"
 
 #if defined(USE_X11)
 extern "C" {
 #include <X11/Xlib.h>
 }
 #endif
 
 namespace gfx {
 
 namespace {
+
 EGLConfig g_config;
 EGLDisplay g_display;
 EGLNativeDisplayType g_native_display;
 EGLConfig g_software_config;
 EGLDisplay g_software_display;
 EGLNativeDisplayType g_software_native_display;
+
+const char* g_egl_extensions = NULL;
+bool g_egl_create_context_robustness_supported = false;
+
 }
 
 GLSurfaceEGL::GLSurfaceEGL() : software_(false) {}
 
 bool GLSurfaceEGL::InitializeOneOff() {
   static bool initialized = false;
   if (initialized)
     return true;
 
 #if defined(USE_X11)
@@ skipping 44 matching lines @@
   if (!eglChooseConfig(g_display,
                        kConfigAttribs,
                        &g_config,
                        1,
                        &num_configs)) {
     LOG(ERROR) << "eglChooseConfig failed with error "
                << GetLastEGLErrorString();
     return false;
   }
 
+  g_egl_extensions = eglQueryString(g_display, EGL_EXTENSIONS);
+  g_egl_create_context_robustness_supported =
+      HasEGLExtension("EGL_EXT_create_context_robustness");
+
   initialized = true;
 
 #if defined(USE_X11) || defined(OS_ANDROID)
   return true;
 #else
   g_software_native_display = EGL_SOFTWARE_DISPLAY_ANGLE;
 #endif
   g_software_display = eglGetDisplay(g_software_native_display);
   if (!g_software_display) {
     return true;
@@ skipping 38 matching lines @@
 }
 
 EGLDisplay GLSurfaceEGL::GetSoftwareDisplay() {
   return g_software_display;
 }
 
 EGLNativeDisplayType GLSurfaceEGL::GetNativeDisplay() {
   return g_native_display;
 }
 
+const char* GLSurfaceEGL::GetEGLExtensions() {
+  return g_egl_extensions;
+}
+
+bool GLSurfaceEGL::HasEGLExtension(const char* name) {
+  return ExtensionsContain(GetEGLExtensions(), name);
+}
+
+bool GLSurfaceEGL::IsCreateContextRobustnessSupported() {
+  return g_egl_create_context_robustness_supported;
+}
+
 GLSurfaceEGL::~GLSurfaceEGL() {}
 
 NativeViewGLSurfaceEGL::NativeViewGLSurfaceEGL(bool software,
                                                gfx::AcceleratedWidget window)
     : window_(window),
       surface_(NULL),
       supports_post_sub_buffer_(false),
       config_(NULL) {
   software_ = software;
 }
@@ skipping 299 matching lines @@
 
   return handle;
 #endif
 }
 
 PbufferGLSurfaceEGL::~PbufferGLSurfaceEGL() {
   Destroy();
 }
 
 }  // namespace gfx