Add driver bug workaround for SH_INIT_GL_POSITION.

gpu/command_buffer/service/shader_translator.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_SHADER_TRANSLATOR_H_
 #define GPU_COMMAND_BUFFER_SERVICE_SHADER_TRANSLATOR_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/containers/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "gpu/gpu_export.h"
 #include "third_party/angle_dx11/include/GLSLANG/ShaderLang.h"
 
 namespace gpu {
 namespace gles2 {
 
 // 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:
   enum GlslImplementationType {
     kGlsl,
     kGlslES
   };
 
-  enum GlslBuiltInFunctionBehavior {
-    kGlslBuiltInFunctionOriginal,
-    kGlslBuiltInFunctionEmulated
-  };
-
   struct VariableInfo {
     VariableInfo()
         : type(0),
           size(0),
           precision(SH_PRECISION_UNDEFINED),
           static_use(0) {
     }
 
     VariableInfo(int _type, int _size, int _precision,
                  int _static_use, std::string _name)
@@ skipping 23 matching lines @@
   // Mapping between hashed name and original name.
   typedef base::hash_map<std::string, std::string> NameMap;
 
   // Initializes the translator.
   // Must be called once before using the translator object.
   virtual bool Init(
       ShShaderType shader_type,
       ShShaderSpec shader_spec,
       const ShBuiltInResources* resources,
       GlslImplementationType glsl_implementation_type,
-      GlslBuiltInFunctionBehavior glsl_built_in_function_behavior) = 0;
+      int driver_bug_workarounds) = 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 29 matching lines @@
   };
 
   ShaderTranslator();
 
   // Overridden from ShaderTranslatorInterface.
   virtual bool Init(
       ShShaderType shader_type,
       ShShaderSpec shader_spec,
       const ShBuiltInResources* resources,
       GlslImplementationType glsl_implementation_type,
-      GlslBuiltInFunctionBehavior glsl_built_in_function_behavior) OVERRIDE;
+      int driver_bug_workarounds) OVERRIDE;

[Ken Russell (switch to Gerrit), 2013/09/06 21:57:27]

Could you please use the ShCompileOptions enum type here for at least a little
hint about the semantics?

 
   // Overridden from ShaderTranslatorInterface.
   virtual bool Translate(const char* shader) OVERRIDE;
 
   // Overridden from ShaderTranslatorInterface.
   virtual const char* translated_shader() const OVERRIDE;
   virtual const char* info_log() const OVERRIDE;
 
   // Overridden from ShaderTranslatorInterface.
   virtual const VariableMap& attrib_map() const OVERRIDE;
@@ skipping 16 matching lines @@
 
   ShHandle compiler_;
   ShBuiltInResources compiler_options_;
   scoped_ptr<char[]> translated_shader_;
   scoped_ptr<char[]> info_log_;
   VariableMap attrib_map_;
   VariableMap uniform_map_;
   VariableMap varying_map_;
   NameMap name_map_;
   bool implementation_is_glsl_es_;
-  bool needs_built_in_function_emulation_;
+  int driver_bug_workarounds_;
   ObserverList<DestructionObserver> destruction_observers_;
 
   DISALLOW_COPY_AND_ASSIGN(ShaderTranslator);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_SHADER_TRANSLATOR_H_