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https://github.com/wheremyfoodat/Panda3DS.git
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4b7bd9df3d
Allows multiple descriptor operations to be batched up and dispatched in one API call rather than scattered through out the code base.
62 lines
No EOL
2.2 KiB
C++
62 lines
No EOL
2.2 KiB
C++
#pragma once
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#include <memory>
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#include <optional>
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#include <variant>
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#include "helpers.hpp"
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#include "vk_api.hpp"
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namespace Vulkan {
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// Implements a re-usable structure for batching up descriptor writes with a
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// finite amount of space for both convenience and to reduce the overall amount
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// of API calls to `vkUpdateDescriptorSets`
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class DescriptorUpdateBatch {
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private:
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const vk::Device device;
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const usize descriptorWriteMax;
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const usize descriptorCopyMax;
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using DescriptorInfoUnion = std::variant<vk::DescriptorImageInfo, vk::DescriptorBufferInfo, vk::BufferView>;
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// Todo: Maybe some kind of hash so that these structures can be re-used
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// among descriptor writes.
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std::unique_ptr<DescriptorInfoUnion[]> descriptorInfos;
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std::unique_ptr<vk::WriteDescriptorSet[]> descriptorWrites;
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std::unique_ptr<vk::CopyDescriptorSet[]> descriptorCopies;
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usize descriptorWriteEnd = 0;
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usize descriptorCopyEnd = 0;
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DescriptorUpdateBatch(vk::Device device, usize descriptorWriteMax, usize descriptorCopyMax)
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: device(device), descriptorWriteMax(descriptorWriteMax), descriptorCopyMax(descriptorCopyMax) {}
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public:
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~DescriptorUpdateBatch() = default;
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DescriptorUpdateBatch(DescriptorUpdateBatch&&) = default;
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void flush();
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void addImage(
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vk::DescriptorSet targetDescriptor, u8 targetBinding, vk::ImageView imageView, vk::ImageLayout imageLayout = vk::ImageLayout::eGeneral
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);
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void addSampler(vk::DescriptorSet targetDescriptor, u8 targetBinding, vk::Sampler sampler);
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void addImageSampler(
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vk::DescriptorSet targetDescriptor, u8 targetBinding, vk::ImageView imageView, vk::Sampler sampler,
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vk::ImageLayout imageLayout = vk::ImageLayout::eShaderReadOnlyOptimal
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);
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void addBuffer(
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vk::DescriptorSet targetDescriptor, u8 targetBinding, vk::Buffer buffer, vk::DeviceSize offset, vk::DeviceSize size = VK_WHOLE_SIZE
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);
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void copyBinding(
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vk::DescriptorSet sourceDescriptor, vk::DescriptorSet targetDescriptor, u8 sourceBinding, u8 targetBinding, u8 sourceArrayElement = 0,
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u8 targetArrayElement = 0, u8 descriptorCount = 1
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);
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static std::optional<DescriptorUpdateBatch> create(vk::Device device, usize descriptorWriteMax = 256, usize descriptorCopyMax = 256);
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};
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} // namespace Vulkan
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