tree e2bdd76e9b8ed3f5837f449d106cf1b6f153f6ef
parent 21bbc2816f197d38baf8e82983aa63b439596a11
author commit-bot@chromium.org <commit-bot@chromium.org@2bbb7eff-a529-9590-31e7-b0007b416f81> 1400080491 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org@2bbb7eff-a529-9590-31e7-b0007b416f81> 1400080491 +0000

Add CPU backing store for GrAtlas to reduce texture uploads.

This change creates a temporary copy of each GrPlot on the CPU
side. As we add glyphs to a plot, a dirty rectangle is tracked,
and just before we render text we upload all of the dirty areas
to the atlas texture. Once a plot is nearly full, we assume that
we may only be adding one or two glyphs before rendering, so we
delete the CPU backing memory to save space, and upload directly.

BUG=366225
R=robertphillips@google.com

Author: jvanverth@google.com

Review URL: https://codereview.chromium.org/269423007

git-svn-id: http://skia.googlecode.com/svn/trunk@14729 2bbb7eff-a529-9590-31e7-b0007b416f81