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// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
// SPDX-FileCopyrightText: Copyright 2025 lsfg-vk
// SPDX-License-Identifier: GPL-3.0-or-later
#pragma once
#include <array>
#include <deque>
#include <initializer_list>
#include <map>
#include <utility>
#include <vector>
#include "common/common_types.h"
#include "video_core/vulkan_common/vulkan_memory_allocator.h"
#include "video_core/vulkan_common/vulkan_wrapper.h"
namespace Vulkan {
class Device;
class LsfgShaders;
constexpr VkFormat LSFG_DEFAULT_FORMAT = VK_FORMAT_R8G8B8A8_UNORM;
constexpr VkFormat LSFG_FLOW_FORMAT = VK_FORMAT_R8_UNORM;
constexpr VkFormat LSFG_MOTION_FORMAT = VK_FORMAT_R16G16B16A16_SFLOAT;
constexpr size_t LSFG_HISTORY_SLOTS = 3;
constexpr size_t LSFG_MAX_TARGETS = 7;
constexpr size_t LSFG_MAX_GENERATIONS = 3;
constexpr size_t LSFG_GENERATION_SLOTS = LSFG_MAX_GENERATIONS * (LSFG_MAX_GENERATIONS + 1) / 2;
[[nodiscard]] constexpr size_t LsfgGenerationSlot(size_t generation_count, size_t generation) {
return (generation_count - 1) * generation_count / 2 + generation;
}
[[nodiscard]] constexpr f32 LsfgTimestamp(size_t generation, size_t generation_count) {
return static_cast<f32>(generation + 1) / static_cast<f32>(generation_count + 1);
}
[[nodiscard]] constexpr size_t LsfgSlotCount(size_t slot) {
size_t count = 1;
while (LsfgGenerationSlot(count + 1, 0) <= slot) {
++count;
}
return count;
}
[[nodiscard]] constexpr f32 LsfgSlotTimestamp(size_t slot) {
const size_t count = LsfgSlotCount(slot);
return LsfgTimestamp(slot - LsfgGenerationSlot(count, 0), count);
}
class LsfgImage {
public:
LsfgImage() = default;
LsfgImage(const Device& device, MemoryAllocator& memory_allocator, VkExtent2D extent_,
VkFormat format = LSFG_DEFAULT_FORMAT);
[[nodiscard]] VkImage Handle() const {
return *image;
}
[[nodiscard]] VkImageView View() const {
return *view;
}
[[nodiscard]] VkExtent2D Extent() const {
return extent;
}
[[nodiscard]] VkFormat Format() const {
return format;
}
[[nodiscard]] VkImageLayout Layout() const {
return layout;
}
void SetLayout(VkImageLayout new_layout) {
layout = new_layout;
}
private:
vk::Image image;
vk::ImageView view;
VkExtent2D extent{};
VkFormat format{VK_FORMAT_UNDEFINED};
VkImageLayout layout{VK_IMAGE_LAYOUT_UNDEFINED};
};
using LsfgImagePair = std::array<LsfgImage, 2>;
using LsfgImageHistory = std::array<LsfgImagePair, LSFG_HISTORY_SLOTS>;
class LsfgResources {
public:
LsfgResources() = default;
LsfgResources(const Device& device_, MemoryAllocator& memory_allocator_, f32 flow_scale_)
: device{&device_}, memory_allocator{&memory_allocator_}, flow_scale{flow_scale_} {}
[[nodiscard]] VkSampler GetSampler(
VkSamplerAddressMode address_mode = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER,
VkCompareOp compare_op = VK_COMPARE_OP_NEVER, bool white_border = false);
[[nodiscard]] VkBuffer GetBuffer(f32 timestamp = 0.0f, bool first_iter = false,
bool first_iter_s = false);
[[nodiscard]] static VkDeviceSize BufferSize();
private:
const Device* device{};
MemoryAllocator* memory_allocator{};
f32 flow_scale{1.0f};
std::map<u64, vk::Sampler> samplers;
std::map<u64, vk::Buffer> buffers;
};
class LsfgBarriers {
public:
explicit LsfgBarriers(vk::CommandBuffer cmdbuf_) : cmdbuf{cmdbuf_} {}
LsfgBarriers& WriteToRead(LsfgImage& image);
LsfgBarriers& ReadToWrite(LsfgImage& image);
LsfgBarriers& WriteToRead(LsfgImage* image);
LsfgBarriers& ReadToWrite(LsfgImage* image);
LsfgBarriers& DiscardToWrite(VkImage image);
template <typename Range>
LsfgBarriers& WriteToReadAll(Range& images) {
for (auto& image : images) {
WriteToRead(image);
}
return *this;
}
template <typename Range>
LsfgBarriers& ReadToWriteAll(Range& images) {
for (auto& image : images) {
ReadToWrite(image);
}
return *this;
}
void Build();
private:
LsfgBarriers& Push(LsfgImage& image, VkAccessFlags src_access, VkAccessFlags dst_access);
vk::CommandBuffer cmdbuf;
std::vector<VkImageMemoryBarrier> barriers;
};
class LsfgDescriptorWriter {
public:
explicit LsfgDescriptorWriter(VkDescriptorSet set_) : set{set_} {}
LsfgDescriptorWriter& AddSampler(VkSampler sampler);
LsfgDescriptorWriter& AddSampledImage(const LsfgImage& image);
LsfgDescriptorWriter& AddSampledImage(const LsfgImage* image);
LsfgDescriptorWriter& AddStorageImage(const LsfgImage& image);
LsfgDescriptorWriter& AddStorageView(VkImageView view);
LsfgDescriptorWriter& AddUniformBuffer(VkBuffer buffer, VkDeviceSize size);
template <typename Range>
LsfgDescriptorWriter& AddSampledImages(const Range& images) {
for (const auto& image : images) {
AddSampledImage(image);
}
return *this;
}
template <typename Range>
LsfgDescriptorWriter& AddStorageImages(const Range& images) {
for (const auto& image : images) {
AddStorageImage(image);
}
return *this;
}
void Build(const Device& device);
private:
LsfgDescriptorWriter& PushImage(VkDescriptorType type, VkSampler sampler, VkImageView view);
VkDescriptorSet set;
u32 binding{};
std::deque<VkDescriptorImageInfo> image_infos;
std::deque<VkDescriptorBufferInfo> buffer_infos;
std::vector<VkWriteDescriptorSet> writes;
};
using LsfgBindings = std::initializer_list<std::pair<u32, VkDescriptorType>>;
class LsfgPass {
public:
LsfgPass() = default;
LsfgPass(const Device& device, const LsfgShaders& shaders, u32 shader_id,
LsfgBindings bindings);
[[nodiscard]] VkDescriptorSetLayout SetLayout() const {
return *descriptor_set_layout;
}
[[nodiscard]] u32 DescriptorCount() const {
return descriptor_count;
}
void Bind(vk::CommandBuffer cmdbuf, VkDescriptorSet set) const;
void BindPipeline(vk::CommandBuffer cmdbuf) const;
void BindSet(vk::CommandBuffer cmdbuf, VkDescriptorSet set) const;
private:
vk::DescriptorSetLayout descriptor_set_layout;
vk::PipelineLayout pipeline_layout;
vk::Pipeline pipeline;
u32 descriptor_count{};
};
[[nodiscard]] vk::DescriptorPool CreateLsfgDescriptorPool(const Device& device, u32 max_sets);
[[nodiscard]] vk::Sampler CreateLsfgSampler(const Device& device, VkSamplerAddressMode address_mode,
VkCompareOp compare_op, bool white_border);
} // namespace Vulkan
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