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Published on Feb 6, 2014
Building 2D rendering acceleration with OpenGL
Speaker: Eric Anholt
A Linux graphics driver stack generally consists of a kernel component, an OpenGL driver, a 2D X Window System driver, a video decode/encode driver, and a small bit of shared code between those 3 userspace components. However, given that a 2D X driver has to program the graphics hardware's 3D pipeline just like OpenGL does, it seems like a waste to build and optimize that hardware support code twice.
The problem is that open source OpenGL has been too slow a long time, due to developers focusing optimization effort on the 2D rendering that made up their desktop environments. However, the majority of developer time is now spent on OpenGL, modern OpenGL offers us some new extensions to reduce the overhead of setting up drawing, and it exposes some hardware functionality that we never got around to exploiting in X.
This talk will cover development in Mesa, Cairo, and X, to rebuild Linux's 2D rendering on top of OpenGL, faster than we've experienced before and in less code.