103 lines
2.9 KiB
Markdown
103 lines
2.9 KiB
Markdown
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# RHITexture
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**命名空间**: `XCEngine::RHI`
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**类型**: `class` (abstract)
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**描述**: GPU 纹理资源抽象接口，用于管理 1D、2D、3D 纹理和立方体贴图等 GPU 资源。
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## 概述
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`RHITexture` 封装了 GPU 纹理的创建、状态管理和属性访问。纹理是 GPU 渲染中最常用的资源类型之一。
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## 公共方法
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### 生命周期
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| 方法 | 描述 |
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|------|------|
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| `virtual void Shutdown()` | 释放纹理资源 |
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### 属性访问
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| 方法 | 描述 |
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|------|------|
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| `virtual uint32_t GetWidth() const` | 获取纹理宽度（像素） |
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| `virtual uint32_t GetHeight() const` | 获取纹理高度（像素） |
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| `virtual uint32_t GetDepth() const` | 获取纹理深度（3D 纹理） |
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| `virtual uint32_t GetMipLevels() const` | 获取 Mipmap 级别数 |
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| `virtual Format GetFormat() const` | 获取纹理格式 |
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| `virtual TextureType GetTextureType() const` | 获取纹理类型 |
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### 状态管理
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| 方法 | 描述 |
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|------|------|
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| `virtual ResourceStates GetState() const` | 获取当前资源状态 |
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| `virtual void SetState(ResourceStates state)` | 设置资源状态 |
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### 其他
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| 方法 | 描述 |
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|------|------|
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| `virtual void* GetNativeHandle()` | 获取原生 API 句柄 |
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| `virtual const std::string& GetName() const` | 获取纹理名称 |
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| `virtual void SetName(const std::string& name)` | 设置纹理名称（用于调试） |
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## 纹理类型 (TextureType)
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| 枚举值 | 描述 |
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|--------|------|
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| `TextureType::Texture1D` | 1D 纹理 |
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| `TextureType::Texture2D` | 2D 纹理 |
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| `TextureType::Texture2DArray` | 2D 纹理数组 |
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| `TextureType::Texture3D` | 3D 纹理（体积纹理） |
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| `TextureType::TextureCube` | 立方体贴图 |
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| `TextureType::TextureCubeArray` | 立方体贴图数组 |
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## 纹理格式 (Format)
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| 格式 | 描述 |
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|------|------|
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| `Format::Unknown` | 未知格式 |
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| `Format::R8_UNorm` | 单通道 8 位归一化 |
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| `Format::R8G8_UNorm` | 双通道 8 位归一化 |
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| `Format::R8G8B8A8_UNorm` | 四通道 8 位归一化 |
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| `Format::R16G16B16A16_Float` | 四通道 16 位浮点 |
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| `Format::R32G32B32A32_Float` | 四通道 32 位浮点 |
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| `Format::D32_Float` | 32 位深度 |
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| `Format::D24_UNorm_S8_UInt` | 24 位深度 + 8 位模板 |
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| `Format::BC1_UNorm` | 压缩格式 (DXT1) |
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| `Format::BC7_UNorm` | 压缩格式 |
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## 使用示例
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```cpp
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// 创建 2D 纹理
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TextureDesc desc;
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desc.width = 1024;
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desc.height = 1024;
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desc.depth = 1;
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desc.mipLevels = 1;
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desc.arraySize = 1;
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desc.format = (uint32_t)Format::R8G8B8A8_UNorm;
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desc.textureType = (uint32_t)TextureType::Texture2D;
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desc.sampleCount = 1;
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desc.sampleQuality = 0;
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desc.flags = 0;
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RHITexture* texture = device->CreateTexture(desc);
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// 设置资源状态
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texture->SetState(ResourceStates::PixelShaderResource);
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// 使用完毕后关闭
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texture->Shutdown();
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```
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## 相关文档
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- [RHIDevice](./rhi-device.md) - 创建设备
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- [RHIBuffer](./rhi-buffer.md) - 缓冲区资源
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- [RHISampler](./rhi-sampler.md) - 纹理采样器
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