Make WebGL extensions get lost when context is lost.

Source/core/html/canvas/OESVertexArrayObject.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 18 matching lines @@
 
 #include "core/html/canvas/WebGLRenderingContext.h"
 #include "core/html/canvas/WebGLVertexArrayObjectOES.h"
 #include "core/platform/graphics/Extensions3D.h"
 
 namespace WebCore {
 
 OESVertexArrayObject::OESVertexArrayObject(WebGLRenderingContext* context)
     : WebGLExtension(context)
 {
     ScriptWrappable::init(this);

[Ken Russell (switch to Gerrit), 2013/06/05 00:46:38]

Missing call to enable()?

-    context->graphicsContext3D()->getExtensions()->ensureEnabled("GL_OES_vertex_array_object");
 }
 
 OESVertexArrayObject::~OESVertexArrayObject()
 {
 }
 
+void OESVertexArrayObject::enable()
+{
+    m_context->graphicsContext3D()->getExtensions()->ensureEnabled("GL_OES_vertex_array_object");
+}
+
 WebGLExtension::ExtensionName OESVertexArrayObject::getName() const
 {
     return OESVertexArrayObjectName;
 }
 
 PassOwnPtr<OESVertexArrayObject> OESVertexArrayObject::create(WebGLRenderingContext* context)
 {
     return adoptPtr(new OESVertexArrayObject(context));
 }
 
 PassRefPtr<WebGLVertexArrayObjectOES> OESVertexArrayObject::createVertexArrayOES()
 {
-    if (m_context->isContextLost())
+    if (isLost())
         return 0;
     
     RefPtr<WebGLVertexArrayObjectOES> o = WebGLVertexArrayObjectOES::create(m_context, WebGLVertexArrayObjectOES::VaoTypeUser);
     m_context->addContextObject(o.get());
     return o.release();
 }
 
 void OESVertexArrayObject::deleteVertexArrayOES(WebGLVertexArrayObjectOES* arrayObject)
 {
-    if (!arrayObject || m_context->isContextLost())
+    if (!arrayObject || isLost())
         return;
     
     if (!arrayObject->isDefaultObject() && arrayObject == m_context->m_boundVertexArrayObject)
         m_context->setBoundVertexArrayObject(0);
 
     arrayObject->deleteObject(m_context->graphicsContext3D());
 }
 
 GC3Dboolean OESVertexArrayObject::isVertexArrayOES(WebGLVertexArrayObjectOES* arrayObject)
 {
-    if (!arrayObject || m_context->isContextLost())
+    if (!arrayObject || isLost())
         return 0;
     
     if (!arrayObject->hasEverBeenBound())
         return 0;
     
     Extensions3D* extensions = m_context->graphicsContext3D()->getExtensions();
     return extensions->isVertexArrayOES(arrayObject->object());
 }
 
 void OESVertexArrayObject::bindVertexArrayOES(WebGLVertexArrayObjectOES* arrayObject, ExceptionCode& ec)
 {
     UNUSED_PARAM(ec);
-    if (m_context->isContextLost())
+    if (isLost())
         return;
     
     if (arrayObject && (arrayObject->isDeleted() || !arrayObject->validate(0, context()))) {
         m_context->graphicsContext3D()->synthesizeGLError(GraphicsContext3D::INVALID_OPERATION);
         return;
     }
     
     Extensions3D* extensions = m_context->graphicsContext3D()->getExtensions();
     if (arrayObject && !arrayObject->isDefaultObject() && arrayObject->object()) {
         extensions->bindVertexArrayOES(arrayObject->object());
@@ skipping 11 matching lines @@
     Extensions3D* extensions = context->graphicsContext3D()->getExtensions();
     return extensions->supports("GL_OES_vertex_array_object");
 }
 
 const char* OESVertexArrayObject::getExtensionName()
 {
     return "OES_vertex_array_object";
 }
 
 } // namespace WebCore