72 lines
2 KiB
C++
72 lines
2 KiB
C++
#include <renderer/backend/vk/context/device.hpp>
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#include <renderer/backend/vk/context/gpu.hpp>
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#include <renderer/backend/vk/data/buffer.hpp>
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namespace lt::renderer::vk {
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Buffer::Buffer(IDevice *device, IGpu *gpu, const CreateInfo &info)
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: m_device(static_cast<Device *>(device))
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, m_gpu(static_cast<Gpu *>(gpu))
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, m_buffer(
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m_device,
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VkBufferCreateInfo {
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.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO,
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.size = info.size,
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.usage = to_native_usage_flags(info.usage),
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.sharingMode = VK_SHARING_MODE_EXCLUSIVE,
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}
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)
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, m_memory(m_device, m_buffer, allocation_info_from_memory_requirements())
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, m_size(info.size)
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{
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}
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[[nodiscard]] auto Buffer::map() -> std::span<std::byte> /* override */
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{
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return m_device->map_memory(m_memory, m_size, 0ul);
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}
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void Buffer::unmap() /* override */
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{
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m_device->unmap_memory(m_memory);
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}
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[[nodiscard]] auto Buffer::to_native_usage_flags(Usage usage) const -> VkBufferUsageFlags
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{
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switch (usage)
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{
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case Usage::vertex: return VK_BUFFER_USAGE_VERTEX_BUFFER_BIT;
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case Usage::index: return VK_BUFFER_USAGE_INDEX_BUFFER_BIT;
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}
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std::unreachable();
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}
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[[nodiscard]] auto Buffer::allocation_info_from_memory_requirements() const -> VkMemoryAllocateInfo
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{
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const auto requirements = m_device->get_memory_requirements(m_buffer);
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auto memory_properties = m_gpu->get_memory_properties();
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const auto required_properties = VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT
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| VK_MEMORY_PROPERTY_HOST_COHERENT_BIT;
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auto type = 0u;
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for (auto idx = 0; idx < memory_properties.memoryTypeCount; ++idx)
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{
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if ((requirements.memoryTypeBits & (1 << idx))
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&& ((memory_properties.memoryTypes[idx].propertyFlags & required_properties)
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== required_properties))
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{
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type = idx;
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break;
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}
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}
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return VkMemoryAllocateInfo {
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.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO,
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.allocationSize = requirements.size,
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.memoryTypeIndex = type,
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};
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}
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} // namespace lt::renderer::vk
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