Track eglMakeCurrent failure in GLContextEGL::ReleaseCurrent

Under lost device conditions, eglMakeCurrent can fail, even when releasing
the context. As we otherwise assume that we have correct bindings when
GLContext::IsCurrent returns true, we need to track the lost state to
ensure that after ReleaseCurrent, IsCurrent will return false.

Bug: 928693
Change-Id: I5bbf2616f872532c03da1e1beeade5c94d920b92
Reviewed-on: https://chromium-review.googlesource.com/c/1457675Reviewed-by: Sunny Sachanandani <sunnyps@chromium.org>
Commit-Queue: Sunny Sachanandani <sunnyps@chromium.org>
Auto-Submit: Antoine Labour <piman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#629879}

ui/gl/gl_context_egl.cc

@@ -62,11 +62,7 @@ using ui::GetLastEGLErrorString;
 namespace gl {
 
 GLContextEGL::GLContextEGL(GLShareGroup* share_group)
-    : GLContextReal(share_group),
-      context_(EGL_NO_CONTEXT),
-      display_(EGL_NO_DISPLAY),
-      config_(nullptr),
-      unbind_fbo_on_makecurrent_(false) {}
+    : GLContextReal(share_group) {}
 
 bool GLContextEGL::Initialize(GLSurface* compatible_surface,
                               const GLContextAttribs& attribs) {
@@ -278,6 +274,8 @@ void GLContextEGL::ReleaseYUVToRGBConverters() {
 
 bool GLContextEGL::MakeCurrent(GLSurface* surface) {
   DCHECK(context_);
+  if (lost_)
+    return false;
   if (IsCurrent(surface))
     return true;
 
@@ -326,14 +324,20 @@ void GLContextEGL::ReleaseCurrent(GLSurface* surface) {
     glBindFramebufferEXT(GL_FRAMEBUFFER, 0);
 
   SetCurrent(nullptr);
-  eglMakeCurrent(display_,
-                 EGL_NO_SURFACE,
-                 EGL_NO_SURFACE,
-                 EGL_NO_CONTEXT);
+  if (!eglMakeCurrent(display_, EGL_NO_SURFACE, EGL_NO_SURFACE,
+                      EGL_NO_CONTEXT)) {
+    DVLOG(1) << "eglMakeCurrent failed to release current with error "
+             << GetLastEGLErrorString();
+    lost_ = true;
+  }
+
+  DCHECK(!IsCurrent(nullptr));
 }
 
 bool GLContextEGL::IsCurrent(GLSurface* surface) {
   DCHECK(context_);
+  if (lost_)
+    return false;
 
   bool native_context_is_current = context_ == eglGetCurrentContext();
 

ui/gl/gl_context_egl.h

@@ -45,10 +45,11 @@ class GL_EXPORT GLContextEGL : public GLContextReal {
   void Destroy();
   void ReleaseYUVToRGBConverters();
 
-  EGLContext context_;
-  EGLDisplay display_;
-  EGLConfig config_;
-  bool unbind_fbo_on_makecurrent_;
+  EGLContext context_ = nullptr;
+  EGLDisplay display_ = nullptr;
+  EGLConfig config_ = nullptr;
+  bool unbind_fbo_on_makecurrent_ = false;
+  bool lost_ = false;
   std::map<gfx::ColorSpace, std::unique_ptr<YUVToRGBConverter>>
       yuv_to_rgb_converters_;