/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef WEBGL_SHADER_VALIDATOR_H_

#define WEBGL_SHADER_VALIDATOR_H_

#include "GLSLANG/ShaderLang.h"

#include "GLDefs.h"

#include "nsString.h"

#include <string>

namespace mozilla {

namespace webgl {

class ShaderValidator final

{

    const ShHandle mHandle;

    const ShCompileOptions mCompileOptions;

    const int mMaxVaryingVectors;

    bool mHasRun;

public:

    static ShaderValidator* Create(GLenum shaderType, ShShaderSpec spec,

                                   ShShaderOutput outputLanguage,

                                   const ShBuiltInResources& resources,

                                   ShCompileOptions compileOptions);

private:

    ShaderValidator(ShHandle handle, ShCompileOptions compileOptions,

                    int maxVaryingVectors)

        : mHandle(handle)

        , mCompileOptions(compileOptions)

        , mMaxVaryingVectors(maxVaryingVectors)

        , mHasRun(false)

    { }

public:

    ~ShaderValidator();

    bool ValidateAndTranslate(const char* source);

    void GetInfoLog(nsACString* out) const;

    void GetOutput(nsACString* out) const;

    bool CanLinkTo(const ShaderValidator* prev, nsCString* const out_log) const;

    size_t CalcNumSamplerUniforms() const;

    size_t NumAttributes() const;

    bool FindAttribUserNameByMappedName(const std::string& mappedName,

                                        const std::string** const out_userName) const;

    bool FindAttribMappedNameByUserName(const std::string& userName,

                                        const std::string** const out_mappedName) const;

    bool FindVaryingMappedNameByUserName(const std::string& userName,

                                         const std::string** const out_mappedName) const;

    bool FindVaryingByMappedName(const std::string& mappedName,

                                 std::string* const out_userName,

                                 bool* const out_isArray) const;

    bool FindUniformByMappedName(const std::string& mappedName,

                                 std::string* const out_userName,

                                 bool* const out_isArray) const;

    bool UnmapUniformBlockName(const nsACString& baseMappedName,

                               nsCString* const out_baseUserName) const;

    void EnumerateFragOutputs(std::map<nsCString, const nsCString> &out_FragOutputs) const;

    bool ValidateTransformFeedback(const std::vector<nsString>& userNames,

                                   uint32_t maxComponents, nsCString* const out_errorText,

                                   std::vector<std::string>* const out_mappedNames);

};

} // namespace webgl

} // namespace mozilla

#endif // WEBGL_SHADER_VALIDATOR_H_