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9e8d262eb5
cbgfx currently makes a separate function call (recomputing some values) for every single pixel it draws. While we mostly don't care that much about display speed, this can become an issue if you're trying to paint the whole screen white on a lowly-clocked Cortex-A53. As a simple solution for these extreme cases, we can build a fast path into clear_screen() that just memset()s the whole framebuffer if the color and pixel format allow it. BUG=chrome-os-partner:54416 TEST=Screen drawing speed on Kevin visibly improves (from 2.5s to 3ms). BUG=None BRANCH=None TEST=None Change-Id: I22f032afbb86b96fa5a0cbbdce8526a905c67b58 Original-Signed-off-by: Julius Werner <jwerner@chromium.org> Original-Reviewed-on: https://review.coreboot.org/15524 Original-Tested-by: build bot (Jenkins) Original-Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org> Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/358591 Reviewed-by: Martin Roth <martinroth@chromium.org> |
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