36 lines
652 B
Markdown
36 lines
652 B
Markdown
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# D3D12Buffer::InitializeFromExisting
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## 函数签名
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```cpp
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bool InitializeFromExisting(ID3D12Resource* resource)
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```
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## 中文描述
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从已存在的 D3D12 资源对象初始化缓冲区包装类，不分配新资源。
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## 参数
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| 参数 | 类型 | 描述 |
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|------|------|------|
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| `resource` | `ID3D12Resource*` | 已存在的 D3D12 资源指针 |
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## 返回值
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`bool` - 初始化是否成功
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## 复杂度
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O(1)
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## 示例
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```cpp
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ComPtr<ID3D12Resource> existingResource;
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device->CreateReservedResource(&desc, state, nullptr, IID_PPV_ARGS(&existingResource));
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D3D12Buffer buffer;
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buffer.InitializeFromExisting(existingResource.Get());
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```
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