1553912 - Update freetype2 to 2.10.0

Status: RESOLVED FIXED

(Core :: Graphics: Text, task, P2)

Description

[Ryan VanderMeulen [:RyanVM]]

+++ This bug was initially created as a clone of Bug #1458905 +++

Version 2.10.0 was released back in March. We should probably pick it up.

CHANGES BETWEEN 2.9.1 and 2.10

I. IMPORTANT CHANGES

- A bunch  of new functions has  been added to access  and process
  COLR/CPAL data of OpenType fonts with color-layered glyphs.

    FT_Palette_Data_Get
      Retrieve color palette data.
    FT_Palette_Select
      Select and activate a color palette for color-layered
      glyphs.
    FT_Palette_Set_Foreground_Color
      Set text foreground color for palette index 0xFFFF.

    FT_Get_Color_Glyph_Layer
      Get color layers for a given glyph (using an interator
      object).

    FT_Bitmap_Blend
      Blend one bitmap onto another with a given color.

- An   experimental  feature   is   the  new   behaviour  of   the
  `FT_LOAD_COLOR' load  flag for color-layered  glyphs: Internally
  it  sets a  flag so  that  if `FT_Render_Glyph'  is called  with
  `FT_RENDER_MODE_NORMAL'      (or       `FT_Load_Glyph'      with
  `FT_LOAD_RENDER'), a default blending  of the color glyph layers
  will happen automatically for convenience.

- As  a   GSoC  2018   project,  Nikhil   Ramakrishnan  completely
  overhauled and modernized the API reference.

II. MISCELLANEOUS

- The  logic for  computing  the global  ascender, descender,  and
  height  of  OpenType  fonts   has  been  slightly  adjusted  for
  consistency.

  . If the `useTypoMetrics' flag (i.e., bit 7 in the `fsSelection'
    field) in the  `OS/2' table is set, use the  `sTypo' fields in
    `OS/2' unconditionally.
  . Otherwise use  the metrics data from the `hhea'  table (if not
    zero).
  . Otherwise use the `sTypo' fields from the `OS/2' table (if not
    zero).
  . Otherwise use the `usWin' data from the `OS/2' table as a last
    resort.

  Variable fonts will apply the `MVAR' deltas to whichever metrics
  were picked.

- `TT_Set_MM_Blend' could  fail if  call repeatedly with  the same
  arguments.

- The precision  of handling  deltas in  Variation Fonts  has been
  increased.  The  problem did only show  up with multidimensional
  designspaces.

- New function `FT_Library_SetLcdGeometry' to  set up the geometry
  of LCD subpixels.

- FreeType now uses the `defaultChar' property of PCF fonts to set
  the  glyph for  the undefined  character  at glyph  index 0  (as
  FreeType already does for all other supported font formats).  As
  a consequence,  the order of  glyphs of  a PCF font  if accessed
  with  FreeType  can  be   different  now  compared  to  previous
  versions.

  This change doesn't affect PCF font access with cmaps.

- `FT_Select_Charmap' has  been changed  to allow  parameter value
  `FT_ENCODING_NONE', which is valid for BDF, PCF, and Windows FNT
  formats to  access built-in cmaps  that don't have  a predefined
  `FT_Encoding' value.

- A previously  reserved field in the  `FT_GlyphSlotRec' structure
  now holds the glyph index.

- On Win32 platforms,  the use of `_DLL' to build  the library has
  been replaced with `DLL_EXPORT' and `DLL_IMPORT'.

- The usual round  of fuzzer bug fixes to  better reject malformed
  fonts.

- `FT_Outline_New_Internal'  and  `FT_Outline_Done_Internal'  have
  been removed.  These two functions were public by oversight only
  and were never documented.

- A new  function `FT_Error_String' returns descriptions  of error
  codes if  configuration macro  FT_CONFIG_OPTION_ERROR_STRINGS is
  defined.

- `FT_Set_MM_WeightVector'  and  `FT_Get_MM_WeightVector' are  new
  functions limited to Adobe MultiMaster fonts to directly set and
  get the weight vector.

- Support for Position Independent Code as needed by  systems that
  prohibit  automatic  address  fixups,  such  as BREW,  has  been
  removed.  [Compilation with modern compilers that use flags like
  `-fPIC' or `-fPIE' is not affected.]

- The  `ftdump' demo  program has  new  options `-c'  and `-C'  to
  display charmaps  in compact and detailed  format, respectively.
  Option `-V' has been removed.

- The `ftview', `ftstring',  and `ftgrid' demo programs  use a new
  command line option `-d' to  specify the program window's width,
  height, and color depth.

- The `ftview' demo program now  displays red boxes for zero-width
  glyphs.

- `ftglyph'   has   limited   support  to   display   fonts   with
  color-layered glyphs.  This will be improved later on.

- `ftgrid' can now display bitmap fonts also.

- The `ttdebug'  demo program has  a new  option `-f' to  select a
  member of a TrueType collection (TTC).

- Other various improvements to the demo programs.

Comment 1

[Ryan VanderMeulen [:RyanVM]]

Green Android Try push:
https://treeherder.mozilla.org/#/jobs?repo=try&revision=dc9e6cd5f9545f06100d6b785698f969c7bd0fdb

Comment 2

[Ryan VanderMeulen [:RyanVM]]

Attachment: Bug 1553912 - Update to FreeType 2.10.0. r=jfkthame

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/8f325eb79d28
Update to FreeType 2.10.0. r=jfkthame

Comment 4

[Arthur Iakab [arthur_iakab]]

https://hg.mozilla.org/mozilla-central/rev/8f325eb79d28