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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 {
using KeyMap = std::unordered_map<std::pair<u32, u32>, u32, Common::PairHash>;
using BoundSamplerMap = std::unordered_map<u32, Tegra::Engines::SamplerDescriptor>;
using BindlessSamplerMap =
std::unordered_map<std::pair<u32, u32>, Tegra::Engines::SamplerDescriptor, Common::PairHash>;
/**
* The ConstBufferLocker is a class use to interface the 3D and compute engines with the shader
* compiler. with it, the shader can obtain required data from GPU state and store it for disk
* shader compilation.
**/
class ConstBufferLocker {
public:
explicit ConstBufferLocker(Tegra::Engines::ShaderType shader_stage);
explicit ConstBufferLocker(Tegra::Engines::ShaderType shader_stage,
Tegra::Engines::ConstBufferEngineInterface& engine);
~ConstBufferLocker();
/// 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);
std::optional<Tegra::Engines::SamplerDescriptor> ObtainBoundSampler(u32 offset);
std::optional<Tegra::Engines::SamplerDescriptor> ObtainBindlessSampler(u32 buffer, u32 offset);
/// Inserts a key.
void InsertKey(u32 buffer, u32 offset, u32 value);
/// Inserts a bound sampler key.
void InsertBoundSampler(u32 offset, Tegra::Engines::SamplerDescriptor sampler);
/// Inserts a bindless sampler key.
void InsertBindlessSampler(u32 buffer, u32 offset, Tegra::Engines::SamplerDescriptor sampler);
/// Checks keys and samplers against engine's current const buffers. Returns true if they are
/// the same value, false otherwise;
bool IsConsistent() const;
/// Returns true if the keys are equal to the other ones in the locker.
bool HasEqualKeys(const ConstBufferLocker& rhs) const;
/// Gives an getter to the const buffer keys in the database.
const KeyMap& GetKeys() const {
return keys;
}
/// Gets samplers database.
const BoundSamplerMap& GetBoundSamplers() const {
return bound_samplers;
}
/// Gets bindless samplers database.
const BindlessSamplerMap& GetBindlessSamplers() const {
return bindless_samplers;
}
private:
const Tegra::Engines::ShaderType stage;
Tegra::Engines::ConstBufferEngineInterface* engine = nullptr;
KeyMap keys;
BoundSamplerMap bound_samplers;
BindlessSamplerMap bindless_samplers;
};
} // namespace VideoCommon::Shader
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