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The advance values computed by generateAdvance() were inconsistent with
those computed by generateMetrics, because the fMatrix22 was being
applied in the latter but not former case. Since fMatrix22.xx is 1.0
almost all the time (the exception is only when skew and scale are both
applied), failures were rare.

This patch is an alternative to ag/#/c/207887, in that they both fix the
problem, but in different ways. That patch made fMatrix22.xx equal to
1.0 in almost all cases, while this one gives correct advance values
for arbitrary fMatrix22 values.

Change-Id: Iedfa36e884e3e3e2f078a5d4edfc82004a54e895

After this checkin, SkCreateTypefaceForScript refs each typeface
that it creates before it returns it.  Additionally, all supported harfbuzz
codepoints are added to the unicode mapping array.  This patch also fixes a test crash (see bug)

Bug:6756432

Change-Id: Ida3276b76e745b817f9e63be54945e411516dd03

This reverts commit 81957ccb

This reverts commit 421654d4

* commit '456fc154':
  Cherrypick change to skia

* commit '8c1c7cfa':
  Cherrypick change to skia

Change-Id: I7514b6931a11a0a79ec3abd4068f72998fcdf99d

    Fonts can be marked with elegant or compact in fallback_fonts.xml.
Webkit uses elegant fonts, Textview uses compact fonts (the default),
unmarked fonts are used by both.

    Bug: 6649136

Change-Id: I6ab6173c2efc50eba8fcc488c89dfdd083fb9c06

* commit 'c27ee87c':

Change-Id: I10b0459ad51c4a2d7d62ad73d2a8fd3e51828f9c

* commit 'e8fff9d9':
  DO NOT MERGE Skia solution to fake-bold fallback fonts.

* commit 'ec1ad08b':
  DO NOT MERGE Skia solution to fake-bold fallback fonts.

This version of the fake-bold-for-fallback-fonts fix addresses the
issue succinctly inside of Skia, with no need for Skia's clients to
be aware of the issue. Attempts to draw a bold parent font flag the
embolden flag in the associated SkScalerContext while leaving the
SkPaint's fake bold flag unmodified.

This depends upon change Icdd13f6b, which arranges for FreeType's
FontHost to ignore redundant embolden requests.

This is a cherry-pick of change I4132a232 from master.

Bug: 6629786
Change-Id: I389d6793e5472d664f6ac7b894927dbfd811be12

This version of the fake-bold-for-fallback-fonts fix addresses the
issue succinctly inside of Skia, with no need for Skia's clients to
be aware of the issue. Attempts to draw a bold parent font flag the
embolden flag in the associated SkScalerContext while leaving the
SkPaint's fake bold flag unmodified.

This depends upon change Icdd13f6b, which arranges for FreeType's
FontHost to ignore redundant embolden requests.

Bug: 6629786
Change-Id: I4132a232896f72f632caefd79add2f00c36a578a

* commit '1316efa2':
  Cherrypick change to skia

* commit '9b1d0758':
  Cherrypick change to skia

Change-Id: I9845f8d042fb89fe0f4876f0021b9ec486ac3ef5

Merge "Fix hardcoded font path. Allow adding new font path thru Skia changes. Bug: 6609231 Change-Id: Ie37ada42e7e78ab78318f3ed76eb627bffaddb1a"

* commit '95e19b22':

Change-Id: If3c616f2b23e6af3a3db542593af52d08a70b7ee

Change the webp_parse_header to read appropriate header bytes (required
for Alpha & lossless bit-stream);
Replaced call WebPGetInfo with WebPGetFeatures to get hasAlpha
information;
Replaced hard-coded setIsOpaque(true) with setIsOpaque(!hasAlpha);
Refactored code for setting decoder config;

Change-Id: I8208233d1aaa0a213a35dd996a72e43f78901c89

* commit '1b0ebcb6':
  Use FreeType's "embolden", but only if face is not already bold.

* commit 'bd64a4dd':
  Use FreeType's "embolden", but only if face is not already bold.

Bug: 6609231
Change-Id: Ie37ada42e7e78ab78318f3ed76eb627bffaddb1a

A side-effect of not knowing the actual SkTypeface used to draw text
until render-time is that we cannot make decisions based upon the
face's proper font metrics. As a result, attempts to draw bold text
will fail when a fallback font with normal weight is selected. With
this, we can feel free to enable fake bold mode even if the primary
font is bold, as the extraneous fake bold bit will just get ignored
at render-time if the actual font used to draw the text is bold.

Bug: 6522642
Change-Id: Icdd13f6bd36a85ba374b6ed7a08b596d4c31e86f

* commit 'a1c8d491':

Change-Id: I487813624accf824b997001a2d88930b916f1a7b

am dbc2ccff: am f37732cf: Merge "detect all masks, and don\'t use masksuperblitter with those." into jb-dev

* commit 'dbc2ccff':
  detect all masks, and don't use masksuperblitter with those.

* commit 'f37732cf':
  detect all masks, and don't use masksuperblitter with those.

This is a cherry-pick of Skia r3364.

bug: 6522740
Change-Id: I9f9360a0fd5d8bfd936072f0f9bae0709768a1b6

* commit '9aae69c6':