sna/trapezoids: Amalgamate adjacent lines

Graphics / X.Org / xf86-video-intel - Chris Wilson [chris-wilson.co.uk] - 4 February 2015 04:44 UTC

If we have two scanlines with identical extents and coverage, we can amalgamate them into a set of multi-row boxes. For simplicity, we only compare with the last box (assuming that the majority of such cases are "rounded-rectangles" where we have a large vertical area with no
variation and can coalesce into a single box). This operates as a second pass to the scanline converter itself coalescing pure-vertical regions.

d7bcb7b sna/trapezoids: Amalgamate adjacent lines
src/sna/sna_trapezoids_imprecise.c | 29 +++++++++++++++++++++++++++++
src/sna/sna_trapezoids_precise.c | 29 +++++++++++++++++++++++++++++
2 files changed, 58 insertions(+)

Upstream: cgit.freedesktop.org

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