The Device Dependent X (DDX) is the part of the x-server that interacts with the hardware.
[링크 : https://en.wikipedia.org/wiki/X.Org_Server]
The Direct Rendering Infrastructure (DRI) is a framework for allowing direct access to graphics hardware under the X Window System in a safe, efficient way.
[링크 : https://en.wikipedia.org/wiki/Direct_Rendering_Infrastructure]
In computing, the Direct Rendering Manager (DRM), a subsystem of the Linux kernel, interfaces with the GPUs of modern video cards. DRM exposes an API that user-space programs can use to send commands and data to the GPU, and to perform operations such as configuring the mode setting of the display.
[링크 : https://en.wikipedia.org/wiki/Direct_Rendering_Manager]
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