Teach GPU command buffer whether a context is webgl.

gpu/command_buffer/service/context_group.h

 // 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.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_CONTEXT_GROUP_H_
 #define GPU_COMMAND_BUFFER_SERVICE_CONTEXT_GROUP_H_
 
 #include <string>
 #include <vector>
 #include "base/basictypes.h"
@@ skipping 26 matching lines @@
 class TextureManager;
 class SubscriptionRefSet;
 class ValuebufferManager;
 class MemoryTracker;
 struct DisallowedFeatures;
 
 // A Context Group helps manage multiple GLES2Decoders that share
 // resources.
 class GPU_EXPORT ContextGroup : public base::RefCounted<ContextGroup> {
  public:
+  enum ContextType {
+    kContextTypeWebGL1,

[piman, 2015/06/09 02:19:37]

nit: CONTEXT_TYPE_WEBGL1 etc. per style guide.

[Zhenyao Mo, 2015/06/09 03:50:23]

Actually the new style guide prefers the constant style instead of the macro
style for enums:

http://google-styleguide.googlecode.com/svn/trunk/cppguide.html#Enumerator_Names

+    kContextTypeWebGL2,
+    kContextTypeOther,
+    kContextTypeUndefined
+  };
+
+  static ContextType GetContextType(unsigned webgl_version);
+
   ContextGroup(
       const scoped_refptr<MailboxManager>& mailbox_manager,
       const scoped_refptr<MemoryTracker>& memory_tracker,
       const scoped_refptr<ShaderTranslatorCache>& shader_translator_cache,
       const scoped_refptr<FeatureInfo>& feature_info,
       const scoped_refptr<SubscriptionRefSet>& subscription_ref_set,
       const scoped_refptr<ValueStateMap>& pending_valuebuffer_state,
       bool bind_generates_resource);
 
   // This should only be called by GLES2Decoder. This must be paired with a
   // call to destroy if it succeeds.
   bool Initialize(
       GLES2Decoder* decoder,
+      ContextType context_type,
       const DisallowedFeatures& disallowed_features);
 
   // Destroys all the resources when called for the last context in the group.
   // It should only be called by GLES2Decoder.
   void Destroy(GLES2Decoder* decoder, bool have_context);
 
   MailboxManager* mailbox_manager() const {
     return mailbox_manager_.get();
   }
 
@@ skipping 172 matching lines @@
  private:
   friend class base::RefCounted<ContextGroup>;
   ~ContextGroup();
 
   bool CheckGLFeature(GLint min_required, GLint* v);
   bool CheckGLFeatureU(GLint min_required, uint32* v);
   bool QueryGLFeature(GLenum pname, GLint min_required, GLint* v);
   bool QueryGLFeatureU(GLenum pname, GLint min_required, uint32* v);
   bool HaveContexts();
 
+  ContextType context_type_;
+
   scoped_refptr<MailboxManager> mailbox_manager_;
   scoped_refptr<MemoryTracker> memory_tracker_;
   scoped_refptr<ShaderTranslatorCache> shader_translator_cache_;
   scoped_ptr<TransferBufferManagerInterface> transfer_buffer_manager_;
   scoped_refptr<SubscriptionRefSet> subscription_ref_set_;
   scoped_refptr<ValueStateMap> pending_valuebuffer_state_;
 
   bool enforce_gl_minimums_;
   bool bind_generates_resource_;
 
@@ skipping 36 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(ContextGroup);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_CONTEXT_GROUP_H_