GLResourceSet.hpp

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/* This file is part of Berserk Engine project                                    */
/* https://github.com/EgorOrachyov/Berserk                                        */
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/* Copyright (c) 2018 - 2021 Egor Orachyov                                        */
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#ifndef BERSERK_GLRESOURCESET_HPP
#define BERSERK_GLRESOURCESET_HPP
 
#include <rhi/RHIResourceSet.hpp>
#include <rhi/opengl/GLDefs.hpp>
#include <rhi/opengl/GLShader.hpp>
 
#include <unordered_map>
 
BRK_NS_BEGIN
 
class GLResourceBindingState {
public:
    BRK_API uint32 GetSlot(uint32 location);
    BRK_API void Clear();
 
private:
    static const uint32 UNUSED_SLOT = 0xffffffff;
    struct Slot {
        uint32 index = UNUSED_SLOT;
    };
 
private:
    std::unordered_map<uint32, Slot> mBoundSlots;
    uint32 mNextSlot = 0;
};
 
class GLResourceSet final : public RHIResourceSet {
public:
    using TextureBinding = RHIResourceSetDesc::TextureBinding;
    using SamplerBinding = RHIResourceSetDesc::SamplerBinding;
    using BufferBinding = RHIResourceSetDesc::BufferBinding;
 
    BRK_API explicit GLResourceSet(const RHIResourceSetDesc &desc);
    BRK_API ~GLResourceSet() override = default;
 
    BRK_API void Update(const RHIResourceSetDesc &desc);
    BRK_API void Bind(GLResourceBindingState &state, const Ref<GLShader> &shader) const;
 
    const std::vector<TextureBinding> &GetTextures() const { return mTextures; }
    const std::vector<SamplerBinding> &GetSamplers() const { return mSamplers; }
    const std::vector<BufferBinding> &GetBuffers() const { return mBuffers; }
 
private:
    std::vector<TextureBinding> mTextures;
    std::vector<SamplerBinding> mSamplers;
    std::vector<BufferBinding> mBuffers;
};
 
BRK_NS_END
 
#endif//BERSERK_GLRESOURCESET_HPP