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// 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.
class ShaderTranslator {
public:
ShaderTranslator();
~ShaderTranslator();
// Initializes the translator.
// Must be called once before using the translator object.
bool Init(ShShaderType shader_type, const ShBuiltInResources* resources);
// Translates the given shader source.
// Returns true if translation is successful, false otherwise.
bool Translate(const char* shader);
// 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.
const char* translated_shader() { return translated_shader_.get(); }
const char* info_log() { return info_log_.get(); }
struct VariableInfo {
int type;
int size;
};
// Mapping between variable name and info.
typedef std::map<std::string, VariableInfo> VariableMap;
const VariableMap& attrib_map() { return attrib_map_; }
const VariableMap& uniform_map() { return uniform_map_; }
private:
void ClearResults();
DISALLOW_COPY_AND_ASSIGN(ShaderTranslator);
ShHandle compiler_;
scoped_array<char> translated_shader_;
scoped_array<char> info_log_;
VariableMap attrib_map_;
VariableMap uniform_map_;
};
} // namespace gles2
} // namespace gpu
#endif // GPU_COMMAND_BUFFER_SERVICE_SHADER_TRANSLATOR_H_
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