Originally posted by fa5hion
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We need to write "most of a 3D driver" in order to get anything more than the most trivial 2D acceleration on the newer parts. What we did from r600 through NI was write code to accelerate 2D operations on the 3D engine in the X driver, and "similar but different" code to accelerate 3D operations on the 3D engine in the Mesa driver.
For SI, we started using glamor to perform 2D operations on the 3D engine using the 3D driver, rather than a separate "2D on 3D HW" driver.
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