Exposed support for dynamically enabling extensions in command buffer...

gpu/command_buffer/service/shader_translator.h

 // Copyright (c) 2010 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_SHADER_TRANSLATOR_H_
 #define GPU_COMMAND_BUFFER_SERVICE_SHADER_TRANSLATOR_H_
 
 #include <map>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/scoped_ptr.h"
 #include "third_party/angle/include/GLSLANG/ShaderLang.h"
 
 namespace gpu {
 namespace gles2 {
 
-// Translates GLSL ES 2.0 shader to desktop GLSL shader.
+// Translates a GLSL ES 2.0 shader to desktop GLSL shader, or just
+// validates GLSL ES 2.0 shaders on a true GLSL ES implementation.
 class ShaderTranslatorInterface {
  public:
   virtual ~ShaderTranslatorInterface() { }
 
   // Initializes the translator.
   // Must be called once before using the translator object.
   virtual bool Init(
       ShShaderType shader_type,
       ShShaderSpec shader_spec,
-      const ShBuiltInResources* resources) = 0;
+      const ShBuiltInResources* resources,
+      bool implementation_is_glsl_es) = 0;
 
   // Translates the given shader source.
   // Returns true if translation is successful, false otherwise.
   virtual bool Translate(const char* shader) = 0;
 
   // The following functions return results from the last translation.
   // The results are NULL/empty if the translation was unsuccessful.
   // A valid info-log is always returned irrespective of whether translation
   // was successful or not.
   virtual const char* translated_shader() const = 0;
@@ skipping 20 matching lines @@
 // Implementation of ShaderTranslatorInterface
 class ShaderTranslator : public ShaderTranslatorInterface {
  public:
   ShaderTranslator();
   ~ShaderTranslator();
 
   // Overridden from ShaderTranslatorInterface.
   virtual bool Init(
       ShShaderType shader_type,
       ShShaderSpec shader_spec,
-      const ShBuiltInResources* resources);
+      const ShBuiltInResources* resources,
+      bool implementation_is_glsl_es);
 
   // Overridden from ShaderTranslatorInterface.
   virtual bool Translate(const char* shader);
 
   // Overridden from ShaderTranslatorInterface.
   virtual const char* translated_shader() const {
       return translated_shader_.get(); }
   virtual const char* info_log() const { return info_log_.get(); }
 
   // Overridden from ShaderTranslatorInterface.
   virtual const VariableMap& attrib_map() const { return attrib_map_; }
   virtual const VariableMap& uniform_map() const { return uniform_map_; }
 
  private:
   void ClearResults();
 
   ShHandle compiler_;
   scoped_array<char> translated_shader_;
   scoped_array<char> info_log_;
   VariableMap attrib_map_;
   VariableMap uniform_map_;
+  bool implementation_is_glsl_es_;
 
   DISALLOW_COPY_AND_ASSIGN(ShaderTranslator);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_SHADER_TRANSLATOR_H_