2025-10-01 11:50:31 +08:00
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---
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title: DirectX12学习笔记（2）——Direct3D初始化
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date: 2023-03-01 19:39:43
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excerpt:
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tags:
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rating: ⭐
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---
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2025-10-01 23:14:14 +08:00
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# Com接口
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需要包含头文件#include <wrl.h>
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常用方法
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- Get()：取得Com接口对象。
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- GetAdressof()：取得Com接口指针地址。
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- Rest()：释放相关使用。
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# 交换链
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D3D使用IDXGISwapChain控制前后缓存交换。
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- ResizeBuffers()
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2025-10-01 23:55:30 +08:00
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- Present()：呈现缓冲区内容。
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2025-10-01 23:14:14 +08:00
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2025-10-02 10:38:48 +08:00
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# 资源描述符号
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1. 常量缓冲区视图（CBV）/SRV/UAV
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2. 采样器（Sample）
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3. 渲染目标视图（RTV）
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4. 深度/模版视图（DSV)
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2025-10-01 11:50:31 +08:00
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2025-10-02 10:38:48 +08:00
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# 多重采样技术
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解析（resolve，或者可以称之为降采样）
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## 利用D3D进行多重采样
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首先填写DXGI_SAMPLE_DESC：
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```c++
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typedef struct DXGI_SAMPLE_DESC
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{
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UINT Count;
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UINT Quality;
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} DXGI_SAMPLE_DESC;
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```
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之后使用ID3D12Device::CheckFeatureSupport查询到对应的质量级别：
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2025-10-07 22:28:45 +08:00
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# DXGI
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- DXGI_MODE_DESC： 分辨率、逐行扫描、缩放方式。
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- DXGI_MODE_SCANLINE_ORDER：缩放优先级。
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- DXGI_MODE_SCALING：缩放方式。
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# 功能支持检测
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2025-10-08 16:49:03 +08:00
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使用ID3D12Device::CheckFeatureSupport()检查功能支持情况。
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- D3D12_FEATURE
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- D3D12_FEATURE_D3D12_OPTIONS
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- D3D12_FEATURE_ARCHITECHTURE
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- D3D12_FEATURE_FEATURE_LEVELS
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- D3D12_FEATURE_FORMAT_SUPPORT
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- D3D12_FEATURE_MULTISAMPLE_QUALITY_LEVELS
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# CPU与GPU间的交互
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## 命令队列
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DX12的命令队列被抽象为ID3D12CommandQueue。使用ID3D12Device::CreateCommandQueue()来创建。
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```c++
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Microsoft::WRL::ComPtr<ID3D12Debug> mCommandQueue;
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D3D12_COMMAND_QUEUE_DESC queueDesc={};
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queueDesc.Type = D3D12_COMMAND_LIST_TYPE_DIRECT;
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queueDesc.Flags = D3D12_COMMAND_QUEUE_FLAG_NONE;
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ThrowIfFailed(md3Device->CreateCommandQueue(&queueDesc,IID_PPV_ARGS(&mCommandQueue)));
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```
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IID_PPV_ARGS
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