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// Copyright 2019 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <unordered_map>
#include "common/common_types.h"
#include "common/hash.h"
#include "video_core/engines/const_buffer_engine_interface.h"
namespace VideoCommon::Shader {
class ConstBufferLocker {
public:
explicit ConstBufferLocker(Tegra::Engines::ShaderType shader_stage);
explicit ConstBufferLocker(Tegra::Engines::ShaderType shader_stage,
Tegra::Engines::ConstBufferEngineInterface* engine);
// Checks if an engine is setup, it may be possible that during disk shader
// cache run, the engines have not been created yet.
bool IsEngineSet() const;
// Use this to set/change the engine used for this shader.
void SetEngine(Tegra::Engines::ConstBufferEngineInterface* engine);
// Retrieves a key from the locker, if it's registered, it will give the
// registered value, if not it will obtain it from maxwell3d and register it.
std::optional<u32> ObtainKey(u32 buffer, u32 offset);
// Manually inserts a key.
void InsertKey(u32 buffer, u32 offset, u32 value);
// Retrieves the number of keys registered.
u32 NumKeys() const;
// Gives an accessor to the key's database.
const std::unordered_map<std::pair<u32, u32>, u32, Common::PairHash>& AccessKeys() const;
// Checks keys against maxwell3d's current const buffers. Returns true if they
// are the same value, false otherwise;
bool AreKeysConsistant() const;
private:
Tegra::Engines::ConstBufferEngineInterface* engine;
Tegra::Engines::ShaderType shader_stage;
std::unordered_map<std::pair<u32, u32>, u32, Common::PairHash> keys{};
};
} // namespace VideoCommon::Shader
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