libdrm tutorial

Posted 2021-09-07 毛毛虫的爹

http://dvdhrm.wordpress.com/2012/09/13/linux-drm-mode-setting-api

http://dvdhrm.wordpress.com/2012/12/21/advanced-drm-mode-setting-api

The Direct Rendering Manager (DRM) is a subsystem of the linux kernel that manages access to graphics cards (GPUs). It is the main video API used by X.org‘s xserver and the xf86-video-*video drivers. However, it can also be used by independent programs to program video output without using the xserver or wayland. In the past most other projects used the much olderfbdev API, however, with more and more drivers being added to the DRM subsystem, there is really no reason to avoid DRM on modern computers, anymore. Unfortunately, there hasn’t been any documentation of the DRM API, yet.

DRM-Modesetting HowTo

I have written a short introduction into the DRM mode-setting API, which can be found on github. It is a full C-file with detailed comments on what is needed to perform simple mode-setting with the DRM-API. I embedded th