UtilsGLSL.hpp

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/* This file is part of Berserk Engine project                                    */
/* https://github.com/EgorOrachyov/Berserk                                        */
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/* MIT License                                                                    */
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/* Copyright (c) 2018 - 2021 Egor Orachyov                                        */
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#ifndef BERSERK_GLSLUTILS_HPP
#define BERSERK_GLSLUTILS_HPP
 
#include <render/shader/Shader.hpp>
#include <render/shader/ShaderParams.hpp>
 
#include <sstream>
 
BRK_NS_BEGIN
 
class UtilsGLSL {
public:
    static void GenerateDefines(const ShaderCompileOptions &options, std::stringstream &stream) {
        stream << "//<-- inserted generated options -->//\n";
        for (const auto &option : options.Get())
            stream << "#define " << option << "\n";
        stream << "//<-- inserted generated options -->//\n";
    }
 
    static void GenerateStruct(const char *name, const char *layout, const ShaderParams &params, std::stringstream &stream) {
        stream << "//<-- inserted generated params code -->//\n";
        stream << "layout (" << layout << ") uniform " << name << " {\n";
 
        for (const auto &p : params.GetParams()) {
            if (p.type == ShaderParamType::Data) {
                auto array = p.arraySize > 1;
                auto type = p.typeData;
 
                stream << "  " << RHIGetShaderDataIdGLSL(type) << " " << p.name;
 
                if (array)
                    stream << "[" << p.arraySize << "];\n";
                else
                    stream << ";\n";
            }
        }
 
        stream << "};\n";
        stream << "//<-- inserted generated params code -->//\n";
    }
 
    static void GenerateUniformParams(const ShaderParams &params, std::stringstream &stream) {
        stream << "//<-- inserted generated uniform params -->//\n";
 
        for (const auto &p : params.GetParams()) {
            if (p.type == ShaderParamType::Texture) {
                auto array = p.arraySize > 1;
                auto type = p.typeParam;
 
                stream << "uniform " << RHIGetShaderParamIdGLSL(type) << " " << p.name;
 
                if (array)
                    stream << "[" << p.arraySize << "];\n";
                else
                    stream << ";\n";
            }
        }
 
        stream << "//<-- inserted generated uniform params -->//\n";
    }
 
    static void GenerateUserCode(const String &code, std::stringstream &stream) {
        stream << "//<-- inserted user code -->//\n";
        stream << code << "\n";
        stream << "//<-- inserted user code -->//\n";
    }
};
 
BRK_NS_END
 
#endif//BERSERK_GLSLUTILS_HPP