61 lines
1.8 KiB
Markdown
61 lines
1.8 KiB
Markdown
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# D3D12UnorderedAccessView
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## 命名空间
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`XCEngine::RHI`
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## 类型
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类 (Class)
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## 描述
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D3D12 无序访问视图 (Unordered Access View, UAV) 封装类，用于在 D3D12 渲染管线中提供对资源的无序读/写访问能力。UAV 允许着色器对资源进行非同步访问，适用于并行计算和延迟渲染等场景。
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## 概述
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`D3D12UnorderedAccessView` 封装了 D3D12 UAV 的创建和生命周期管理。UAV 是一种可以同时被 GPU 读取和写入的资源视图，常见用途包括：
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- 计算着色器 (Compute Shader) 的数据存储
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- 延迟渲染中的光照参数存储
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- 粒子系统的位置/速度数据
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- 纹理流式传输缓冲
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## 公共方法表格
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| 方法 | 签名 | 描述 |
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|------|------|------|
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| `Initialize` | `void Initialize(ID3D12Device* device, ID3D12Resource* resource, const D3D12_UNORDERED_ACCESS_VIEW_DESC* desc = nullptr)` | 初始化 UAV，创建 D3D12 无序访问视图 |
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| `Shutdown` | `void Shutdown()` | 释放 UAV 相关资源 |
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| `GetCPUDescriptorHandle` | `D3D12_CPU_DESCRIPTOR_HANDLE GetCPUDescriptorHandle() const` | 获取 CPU 端的描述符句柄 |
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## 使用示例
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```cpp
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#include "XCEngine/RHI/D3D12/D3D12UnorderedAccessView.h"
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#include "XCEngine/RHI/D3D12/D3D12Device.h"
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// 创建设备和资源后...
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D3D12Device* device = ...;
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ID3D12Resource* bufferResource = ...;
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// 创建无序访问视图
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XCEngine::RHI::D3D12UnorderedAccessView uav;
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uav.Initialize(device->GetDevice(), bufferResource, nullptr);
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// 在命令列表中设置 UAV
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commandList->SetComputeRootUnorderedAccessView(
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parameterIndex,
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uav.GetCPUDescriptorHandle()
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);
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// 使用完毕后清理
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uav.Shutdown();
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```
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## 相关文档
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- [D3D12ShaderResourceView](../shader-resource-view/)
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- [D3D12RenderTargetView](../render-target-view/)
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- [D3D12ConstantBufferView](../constant-buffer-view/)
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