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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
#include <vector>
#include "video_core/frame_gen/lossless_dll.h"
#include "video_core/renderer_vulkan/present/lsfg_alpha.h"
#include "video_core/renderer_vulkan/present/lsfg_shaders.h"
#include "video_core/renderer_vulkan/present/util.h"
#include "video_core/vulkan_common/vulkan_device.h"
namespace Vulkan {
namespace {
constexpr u32 DISPATCH_TILE_SHIFT = 3;
[[nodiscard]] u32 GroupCount(u32 size) {
return (size + (1u << DISPATCH_TILE_SHIFT) - 1) >> DISPATCH_TILE_SHIFT;
}
[[nodiscard]] VkExtent2D HalveExtent(VkExtent2D extent) {
return VkExtent2D{
.width = (extent.width + 1) >> 1,
.height = (extent.height + 1) >> 1,
};
}
} // Anonymous namespace
LsfgAlphaPasses::LsfgAlphaPasses(const Device& device, const LsfgShaders& shaders) {
using namespace VideoCore::FrameGen::PerformanceShader;
passes[0] = LsfgPass(device, shaders, ALPHA[0],
{{1, VK_DESCRIPTOR_TYPE_SAMPLER},
{1, VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE},
{1, VK_DESCRIPTOR_TYPE_STORAGE_IMAGE}});
passes[1] = LsfgPass(device, shaders, ALPHA[1],
{{1, VK_DESCRIPTOR_TYPE_SAMPLER},
{1, VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE},
{1, VK_DESCRIPTOR_TYPE_STORAGE_IMAGE}});
passes[2] = LsfgPass(device, shaders, ALPHA[2],
{{1, VK_DESCRIPTOR_TYPE_SAMPLER},
{1, VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE},
{2, VK_DESCRIPTOR_TYPE_STORAGE_IMAGE}});
passes[3] = LsfgPass(device, shaders, ALPHA[3],
{{1, VK_DESCRIPTOR_TYPE_SAMPLER},
{2, VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE},
{2, VK_DESCRIPTOR_TYPE_STORAGE_IMAGE}});
}
LsfgAlpha::LsfgAlpha(const Device& device, MemoryAllocator& memory_allocator,
const LsfgAlphaPasses& passes_, LsfgResources& resources,
vk::DescriptorPool& descriptor_pool, LsfgImage& input_)
: passes{&passes_}, input{&input_} {
const VkExtent2D half_extent = HalveExtent(input->Extent());
const VkExtent2D quarter_extent = HalveExtent(half_extent);
temp1 = LsfgImage(device, memory_allocator, half_extent);
temp2 = LsfgImage(device, memory_allocator, half_extent);
for (size_t i = 0; i < temp3.size(); ++i) {
temp3[i] = LsfgImage(device, memory_allocator, quarter_extent);
for (size_t j = 0; j < LSFG_HISTORY_SLOTS; ++j) {
out_images[j][i] = LsfgImage(device, memory_allocator, quarter_extent);
}
}
std::vector<VkDescriptorSetLayout> layouts;
for (size_t i = 0; i < LSFG_ALPHA_STAGES - 1; ++i) {
layouts.push_back(passes->Get(i).SetLayout());
}
for (size_t i = 0; i < LSFG_HISTORY_SLOTS; ++i) {
layouts.push_back(passes->Get(3).SetLayout());
}
owned_sets = CreateWrappedDescriptorSets(descriptor_pool, layouts);
for (size_t i = 0; i < LSFG_ALPHA_STAGES - 1; ++i) {
descriptor_sets[i] = owned_sets[i];
}
for (size_t i = 0; i < LSFG_HISTORY_SLOTS; ++i) {
last_descriptor_sets[i] = owned_sets[LSFG_ALPHA_STAGES - 1 + i];
}
const VkSampler sampler = resources.GetSampler();
LsfgDescriptorWriter(descriptor_sets[0])
.AddSampler(sampler)
.AddSampledImage(*input)
.AddStorageImage(temp1)
.Build(device);
LsfgDescriptorWriter(descriptor_sets[1])
.AddSampler(sampler)
.AddSampledImage(temp1)
.AddStorageImage(temp2)
.Build(device);
LsfgDescriptorWriter(descriptor_sets[2])
.AddSampler(sampler)
.AddSampledImage(temp2)
.AddStorageImages(temp3)
.Build(device);
for (size_t i = 0; i < LSFG_HISTORY_SLOTS; ++i) {
LsfgDescriptorWriter(last_descriptor_sets[i])
.AddSampler(sampler)
.AddSampledImages(temp3)
.AddStorageImages(out_images[i])
.Build(device);
}
}
void LsfgAlpha::PushBarriers(LsfgBarriers& barriers, u64 frame_count, size_t stage) {
switch (stage) {
case 0:
barriers.WriteToRead(*input).ReadToWrite(temp1);
break;
case 1:
barriers.WriteToRead(temp1).ReadToWrite(temp2);
break;
case 2:
barriers.WriteToRead(temp2).ReadToWriteAll(temp3);
break;
default:
barriers.WriteToReadAll(temp3).ReadToWriteAll(out_images[frame_count % LSFG_HISTORY_SLOTS]);
break;
}
}
void LsfgAlpha::DispatchStage(vk::CommandBuffer cmdbuf, u64 frame_count, size_t stage) {
const VkExtent2D extent = stage < 2 ? temp1.Extent() : temp3[0].Extent();
const VkDescriptorSet set = stage < LSFG_ALPHA_STAGES - 1
? descriptor_sets[stage]
: last_descriptor_sets[frame_count % LSFG_HISTORY_SLOTS];
passes->Get(stage).BindSet(cmdbuf, set);
cmdbuf.Dispatch(GroupCount(extent.width), GroupCount(extent.height), 1);
}
} // namespace Vulkan
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