Decompress ETC texture data when there is no native support.

gpu/command_buffer/service/context_state.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.
 
 // This file contains the ContextState class.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_CONTEXT_STATE_H_
 #define GPU_COMMAND_BUFFER_SERVICE_CONTEXT_STATE_H_
 
 #include <memory>
@@ skipping 177 matching lines @@
   void RestoreVertexAttribs() const;
   void RestoreBufferBindings() const;
   void RestoreGlobalState(const ContextState* prev_state) const;
   void RestoreProgramSettings(const ContextState* prev_state,
                               bool restore_transform_feedback_bindings) const;
   void RestoreRenderbufferBindings();
   void RestoreIndexedUniformBufferBindings(const ContextState* prev_state);
   void RestoreTextureUnitBindings(
       GLuint unit, const ContextState* prev_state) const;
 
+  void PushTextureDecompressionUnpackState() const;
+  void RestoreUnpackState() const;
+
   // Helper for getting cached state.
   bool GetStateAsGLint(
       GLenum pname, GLint* params, GLsizei* num_written) const;
   bool GetStateAsGLfloat(
       GLenum pname, GLfloat* params, GLsizei* num_written) const;
   bool GetEnabled(GLenum cap) const;
 
   inline void SetDeviceColorMask(GLboolean red,
                                  GLboolean green,
                                  GLboolean blue,
@@ skipping 116 matching lines @@
 
   FeatureInfo* feature_info_;
   std::unique_ptr<ErrorState> error_state_;
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_CONTEXT_STATE_H_