tree 96155b8ea1de77b113eed479b0397df9f5bdb168
parent 03d3bb00bb9934feb453a6d367b84c8576a69acc
author bungeman <bungeman@google.com> 1417811204 -0800
committer Commit bot <commit-bot@chromium.org> 1417811204 -0800

Factor text size device mapping in SkScalerContext.

All of our font back-ends use the text size in some way other than
simple concatentation with the current matrix. The code here finds
the full device matrix and then decomposes it to extract the text
size.

FreeType, GDI, and DirectWrite use the text size as the pre-hint scale.
CoreText will not scale color emoji above the requested text size,
and certain features like 'trak' are performed on the text size.

Review URL: https://codereview.chromium.org/748883005