commit c13bc571d3e61a43b87eb97f0719abd304cafaf2
author Florin Malita <fmalita@google.com> Fri Sep 26 10:33:37 2014 -0400
committer Florin Malita <fmalita@google.com> Fri Sep 26 10:33:37 2014 -0400
tree 819036c0fc5634ddf7784a036c0f1fe2ce914b9a
parent 2cce421bdf836ea269ddc98ffbb688acb8dd544e

Fix SkTextBlob offset semantics.

Implement proper x/y drawTextBlob() handling by plumbing a
drawPosText() offset parameter (to act as an additional glyph pos
translation) throughout the device layer.

The new offset superceeds the existing constY, with a minor semantic
tweak: whereas previous implementations were ignoring constY in 2D
positioning mode (scalarsPerGlyph == 2), now the offset is always
observed, in all positioning modes. We can do this because existing
drawPosText() clients always pass constY == 0 for full positioning mode.

R=reed@google.com, jvanverth@google.com, robertphillips@google.com

Review URL: https://codereview.chromium.org/605533002