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lavapipe: all of the lines features

Erik Faye-Lund requested to merge kusma/mesa:lvp-line-fixes into main

Here's an attempt at finishing off line rasterization for Lavapipe, including the strictLines-feature.

AFAIK, there's still two CTS cases that are failing, but I think that's due to bugs in the CTS, where rectangular lines are incorrectly validated against Bresenham lines. These are the tests:

  • dEQP-VK.rasterization.primitives.static_stipple.rectangular_line_strip_wide
  • dEQP-VK.rasterization.primitives_multisample_4_bit.dynamic_stipple.line_strip_wide

...and here's a CTS issue about them: https://github.com/KhronosGroup/VK-GL-CTS/issues/274

Edited by Erik Faye-Lund

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