Max Staudt <msta...@suse.de> writes: > OpenGL implementations are allowed to be imprecise in drawing line caps. > This patch expands on the original workaround in dc9fa908.
Yeah, finding a way to work around GL differences seems like a good idea. In this case, however, I think you're fixing some drivers and breaking others -- when drawing with non-idempotent raster ops. Idempotent raster ops are those for which multiple draws generate the same result, like GXcopy; hence non-idempotent operations are those which do not, such as GXxor. I'm not sure what we should do here; there's no requirement in the protocol that we do anything at all as the server is allowed to draw pretty much whatever it wants for zero-width lines. If you've found specific problems with Mesa drivers, I'd suggest we actually go fix those instead of working around them in the X server. The GL spec seems pretty clear in what it wants, and I think that aligns with what the X server currently expects. -- -keith
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