docs: update resources API docs
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# TextureImportSettings
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**命名空间**: `XCEngine::Resources`
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**类型**: `class`
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**继承**: `ImportSettings`
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**头文件**: `XCEngine/Resources/TextureImportSettings.h`
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**描述**: 纹理资源导入设置类,定义从外部图像文件导入纹理时的配置选项。
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---
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## 概述
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`TextureImportSettings` 继承自 `ImportSettings`,提供纹理导入时的完整配置能力。支持纹理类型、目标格式、Mipmap 生成、各项异性过滤、sRGB 转换、图像翻转、边框颜色、压缩质量、硬件压缩、纹理最大尺寸、法线贴图生成等选项。`LoadFromJSON()` 和 `SaveToJSON()` 当前为 stub 实现。
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---
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## 公共方法
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| 方法 | 描述 |
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|------|------|
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| `TextureImportSettings()` | 构造函数 |
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| `virtual ~TextureImportSettings() override` | 析构函数 |
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| `Core::UniqueRef<ImportSettings> Clone() const override` | 克隆设置对象 |
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| `bool LoadFromJSON(const Containers::String& json) override` | 从 JSON 加载设置(stub) |
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| `Containers::String SaveToJSON() const override` | 保存为 JSON(stub) |
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| `void SetTextureType(TextureType type)` | 设置纹理类型 |
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| `TextureType GetTextureType() const` | 获取纹理类型 |
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| `void SetTargetFormat(TextureFormat format)` | 设置目标格式 |
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| `TextureFormat GetTargetFormat() const` | 获取目标格式 |
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| `void SetGenerateMipmaps(bool generate)` | 设置是否生成 Mipmap |
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| `bool GetGenerateMipmaps() const` | 获取是否生成 Mipmap |
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| `void SetMipmapFilter(MipmapFilter filter)` | 设置 Mipmap 滤波器 |
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| `MipmapFilter GetMipmapFilter() const` | 获取 Mipmap 滤波器 |
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| `void SetMaxAnisotropy(Core::uint32 anisotropy)` | 设置最大各向异性级别 |
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| `Core::uint32 GetMaxAnisotropy() const` | 获取最大各向异性级别 |
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| `void SetSRGB(bool srgb)` | 设置是否 sRGB |
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| `bool GetSRGB() const` | 获取 sRGB 设置 |
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| `void SetFlipVertical(bool flip)` | 设置是否垂直翻转 |
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| `bool GetFlipVertical() const` | 获取垂直翻转设置 |
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| `void SetFlipHorizontal(bool flip)` | 设置是否水平翻转 |
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| `bool GetFlipHorizontal() const` | 获取水平翻转设置 |
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| `void SetBorderColor(const Math::Vector3& color)` | 设置边框颜色 |
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| `const Math::Vector3& GetBorderColor() const` | 获取边框颜色 |
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| `void SetCompressionQuality(CompressionQuality quality)` | 设置压缩质量 |
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| `CompressionQuality GetCompressionQuality() const` | 获取压缩质量 |
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| `void SetUseHardwareCompression(bool use)` | 设置是否使用硬件压缩 |
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| `bool GetUseHardwareCompression() const` | 获取硬件压缩设置 |
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| `void SetMaxSize(Core::uint32 size)` | 设置最大纹理尺寸 |
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| `Core::uint32 GetMaxSize() const` | 获取最大纹理尺寸 |
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| `void SetGenerateNormalMap(bool generate)` | 设置是否生成法线贴图 |
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| `bool GetGenerateNormalMap() const` | 获取法线贴图生成设置 |
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| `void SetNormalMapStrength(float strength)` | 设置法线贴图强度 |
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| `float GetNormalMapStrength() const` | 获取法线贴图强度 |
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---
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## MipmapFilter 枚举
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| 值 | 描述 |
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|------|------|
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| `Box` | Box 滤波器 |
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| `Kaiser` | Kaiser 滤波器 |
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---
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## CompressionQuality 枚举
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| 值 | 描述 |
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|------|------|
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| `Low` | 低质量 |
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| `Medium` | 中等质量 |
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| `High` | 高质量 |
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| `Ultra` | 超高质量 |
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---
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## 使用示例
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```cpp
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#include <XCEngine/Resources/TextureImportSettings.h>
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#include <XCEngine/Resources/ResourceManager.h>
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// 创建导入设置
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TextureImportSettings settings;
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settings.SetTextureType(TextureType::Texture2D);
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settings.SetTargetFormat(TextureFormat::RGBA8);
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settings.SetGenerateMipmaps(true);
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settings.SetMipmapFilter(MipmapFilter::Kaiser);
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settings.SetMaxAnisotropy(16);
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settings.SetSRGB(true);
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settings.SetFlipVertical(false);
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settings.SetFlipHorizontal(false);
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settings.SetBorderColor(Math::Vector3::Zero());
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settings.SetCompressionQuality(CompressionQuality::High);
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settings.SetUseHardwareCompression(true);
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settings.SetMaxSize(2048);
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settings.SetGenerateNormalMap(false);
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settings.SetNormalMapStrength(1.0f);
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// 克隆设置
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auto cloned = settings.Clone();
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// 加载纹理资源
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ResourceHandle<Texture> tex = ResourceManager::Get().Load<Texture>("textures/diffuse.png", &settings);
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```
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---
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## 相关文档
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- [方法详情](methods.md) - 所有方法的详细文档
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- [ImportSettings](../importsettings/importsettings.md) - 导入设置基类
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- [IResourceLoader](../iloader/iloader.md) - 资源加载器接口
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- [ResourceManager](../resourcemanager/resourcemanager.md) - 资源管理器
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- [Texture](../texture/texture.md) - 纹理资源类
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- [Resources 总览](../resources.md) - 资源模块总览
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