2nd / 4th phantom point rounding.

R=bsiegert
CC=golang-dev, remyoudompheng
https://codereview.appspot.com/32040043

opcodes.

R=bsiegert
CC=golang-dev, remyoudompheng
https://codereview.appspot.com/29510043

Successfully hint all of DejaVu Sans Oblique, barring 4 exceptions
that are errors in the upstream C Freetype project. See
http://lists.nongnu.org/archive/html/freetype/2013-11/msg00004.html
for details.

R=bsiegert
CC=golang-dev, remyoudompheng
https://codereview.appspot.com/21580044

Also add API for vertical metrics.

R=bsiegert
CC=golang-dev, remyoudompheng
https://codereview.appspot.com/21330043

R=bsiegert
CC=golang-dev, remyoudompheng
https://codereview.appspot.com/19090043

Also make phantom point delta-X adjustment.

Also make print-glyph-points require Freetype version >= 2.5, which is
the latest version, at the time of writing.

R=bsiegert
CC=golang-dev, remyoudompheng
https://codereview.appspot.com/18370043

R=bsiegert
CC=golang-dev, remyoudompheng
https://codereview.appspot.com/16500043

The difference is quite large on glyph 509 (period character)
of Adobe Source Sans Pro Bold Italic.

R=golang-dev, nigeltao, bsiegert
CC=golang-dev
https://codereview.appspot.com/16820043

Committer: Nigel Tao <nigeltao@golang.org>

R=golang-dev, nigeltao, bsiegert
CC=golang-dev
https://codereview.appspot.com/16630044

Committer: Nigel Tao <nigeltao@golang.org>

These instructions are found in Adobe Source Sans Pro fonts.

R=golang-dev, nigeltao, bsiegert
CC=golang-dev
https://codereview.appspot.com/16440043

Committer: Nigel Tao <nigeltao@golang.org>

Fix MIRP opcodes, scaled CVT initialization and Hinter.move.

R=bsiegert
CC=golang-dev, remyoudompheng
https://codereview.appspot.com/14930050

Found in Adobe Source Sans Pro.

R=golang-dev, bsiegert, nigeltao
CC=golang-dev
https://codereview.appspot.com/15360043

Committer: Nigel Tao <nigeltao@golang.org>

I fail at copy/pasting from the main Go repo.

R=adg, remyoudompheng
CC=golang-dev
https://codereview.appspot.com/14960051

R=dsymonds, adg
CC=golang-dev
https://codereview.appspot.com/15050048

R=bsiegert
CC=golang-dev
https://codereview.appspot.com/14802046

Also increase the maximum recursion depth from 4 to 8, since some
x-deja-vu-sans-oblique glyphs are actually depth 4. It's an arbitrary
limit. The C Freetype code doesn't seem to limit recursion (below
whatever the font says it needs), but it seems safer to have a limit.

R=bsiegert
CC=golang-dev
https://codereview.appspot.com/14494062

R=bsiegert
CC=golang-dev
https://codereview.appspot.com/14425064

one more test case.

R=bsiegert
CC=golang-dev
https://codereview.appspot.com/14691043

R=bsiegert
CC=golang-dev
https://codereview.appspot.com/14641043

"go test" drops from 5.203s to 0.474s.

R=bsiegert
CC=golang-dev
https://codereview.appspot.com/14566047

R=bsiegert
CC=golang-dev
https://codereview.appspot.com/14604044

R=bsiegert
CC=golang-dev
https://codereview.appspot.com/14548046

points accordingly.

Yes, it's a mess, but let's pass the tests first, and then refactor.

R=bsiegert
CC=golang-dev
https://codereview.appspot.com/14419052

R=bsiegert, r
CC=golang-dev
https://codereview.appspot.com/14414044

testdata/, in anticipation of having other test data.

R=dsymonds
CC=bsiegert, golang-dev
https://codereview.appspot.com/14361044

We now match Freetype C exactly for hinting luxisr.ttf. Yay.

R=bsiegert
CC=golang-dev
https://codereview.appspot.com/14336044

value and the MDRP instruction's use of the single-width value.

R=bsiegert
CC=golang-dev
https://codereview.appspot.com/14273043

Hinter's state, instead of having a glyph shrink and restore its
points around hinting.

R=bsiegert
CC=golang-dev
https://codereview.appspot.com/14203043

R=bsiegert
CC=golang-dev
https://codereview.appspot.com/14117043

Freetype implementation.

The spec is the "Order of rounding operations" part of
https://developer.apple.com/fonts/TTRefMan/RM02/Chap2.html#rounding
but it wasn't exactly clear to me what "the negative round value
closest to zero" was: if the phase is 1/4, was that value -1/4 or
-3/4? Anyway, the Go code now follows the C code, and code trumps
documentation.

R=bsiegert
CC=golang-dev
https://codereview.appspot.com/14092044

R=bsiegert
CC=golang-dev
https://codereview.appspot.com/13965043

R=bsiegert
CC=golang-dev
https://codereview.appspot.com/13855043

We can now hint the .notdef glyph from luxisr.ttf. Yay.

R=bsiegert
CC=golang-dev
https://codereview.appspot.com/12829048

Also add a test that freetype-go derives the same glyph points as
the C freetype implementation.

R=bsiegert
CC=golang-dev
https://codereview.appspot.com/12670046

These new opcodes aren't unit-tested per se, but they will be
exercised by an end-to-end hinting test of the Luxi fonts.

R=bsiegert
CC=golang-dev
https://codereview.appspot.com/12100043

R=bsiegert
CC=golang-dev
https://codereview.appspot.com/11983043

to package truetype.

R=bsiegert
CC=golang-dev
http://codereview.appspot.com/6427062

Also re-arrange some of the switch cases to be in opcode order.

R=bsiegert
CC=golang-dev
http://codereview.appspot.com/6352097

R=bsiegert
CC=golang-dev
http://codereview.appspot.com/6343091

R=bsiegert
CC=golang-dev
http://codereview.appspot.com/6354080