將 ID3D11Texture2D 轉換為內存緩衝區 (Convert ID3D11Texture2D into a memory buffer)

問題描述

將 ID3D11Texture2D 轉換為內存緩衝區 (Convert ID3D11Texture2D into a memory buffer)

我們如何將ID3D11Texture2D 轉換為內存緩衝區？我有 ID3D11Texture2D* 並且需要從它讀取數據到內存緩衝區。

參考解法

方法 1:

You need to create a second texture with the same format/size, but create it as staging.

Texture description

Cpu access flags needs to be set to D3D11_CPU_ACCESS_READ and usage needs to be set to D3D11_USAGE_STAGING.

Then you can call ID3D11DeviceContext::CopyResource to copy from the texture to the staging one.

And then you call Map to access data.

(by star、mrvux)

參考文件

1. Convert ID3D11Texture2D into a memory buffer (CC BY‑SA 2.5/3.0/4.0)