72 lines
2.5 KiB
Markdown
72 lines
2.5 KiB
Markdown
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# D3D12Sampler 类
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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)，继承自 `RHISampler`
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## 描述
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D3D12 采样器实现类，用于配置纹理采样状态。封装 D3D12 采样器描述符，支持过滤模式、寻址模式等采样参数配置。
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## 概述
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`D3D12Sampler` 是 RHI 抽象层在 DirectX 12 后端的采样器实现。该类管理 D3D12 采样器状态，与 `RHISampler` 基类配合提供跨平台统一的采样器接口。
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**当前实现状态**: 本类为存根实现，`Initialize()` 仅存储描述符，未创建实际 D3D12 采样器对象。
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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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| `D3D12Sampler` | `D3D12Sampler()` | 构造函数，初始化描述符为零 |
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| `~D3D12Sampler` | `~D3D12Sampler()` | 析构函数，调用 `Shutdown()` |
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| `Initialize` | `bool Initialize(ID3D12Device* device, const D3D12_SAMPLER_DESC& desc)` | 初始化采样器 |
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| `Shutdown` | `void Shutdown()` | 关闭采样器，重置描述符 |
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| `GetDesc` | `D3D12_SAMPLER_DESC GetDesc() const` | 获取采样器描述符副本 |
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| `GetNativeHandle` | `void* GetNativeHandle()` | 获取原生句柄（暂未实现） |
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| `GetID` | `unsigned int GetID()` | 获取采样器 ID（暂未实现） |
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| `Bind` | `void Bind(unsigned int unit)` | 绑定到纹理单元（暂未实现） |
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| `Unbind` | `void Unbind(unsigned int unit)` | 从纹理单元解绑（暂未实现） |
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## 头文件
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```cpp
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#include "XCEngine/RHI/D3D12/D3D12Sampler.h"
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```
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## 使用示例
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```cpp
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#include "XCEngine/RHI/D3D12/D3D12Sampler.h"
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using namespace XCEngine::RHI;
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// 创建设备指针 (假设已创建)
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ID3D12Device* device = ...;
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// 配置采样器描述符
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D3D12_SAMPLER_DESC samplerDesc = {};
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samplerDesc.Filter = D3D12_FILTER_MIN_MAG_MIP_LINEAR;
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samplerDesc.AddressU = D3D12_TEXTURE_ADDRESS_MODE_WRAP;
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samplerDesc.AddressV = D3D12_TEXTURE_ADDRESS_MODE_WRAP;
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samplerDesc.AddressW = D3D12_TEXTURE_ADDRESS_MODE_WRAP;
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samplerDesc.MaxAnisotropy = 16;
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samplerDesc.ComparisonFunc = D3D12_COMPARISON_FUNC_LESS;
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samplerDesc.BorderColor[0] = 0.0f;
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samplerDesc.BorderColor[1] = 0.0f;
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samplerDesc.BorderColor[2] = 0.0f;
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samplerDesc.BorderColor[3] = 1.0f;
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// 创建并初始化采样器
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D3D12Sampler* sampler = new D3D12Sampler();
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if (sampler->Initialize(device, samplerDesc)) {
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D3D12_SAMPLER_DESC desc = sampler->GetDesc();
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// 使用采样器...
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sampler->Shutdown();
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}
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delete sampler;
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```
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## 相关文档
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- [RHISampler 基类](../RHISampler.md)
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- [D3D12 枚举映射](./D3D12Enum.md)
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