1722989 - Update freetype2 to 2.11.0

Status: RESOLVED FIXED

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

Description

[Ryan VanderMeulen [:RyanVM]]

+++ This bug was initially created as a clone of Bug #1672411 +++

CHANGES BETWEEN 2.10.4 and 2.11.0

I. IMPORTANT CHANGES

• A new rendering module has been added to create 8-bit Signed
  Distance Field (SDF) bitmaps for both outline and bitmap glyphs.
  The new rendering mode is called FT_RENDER_MODE_SDF, the pixel
  mode is FT_PIXEL_MODE_GRAY8, and the corresponding raster flag
  is FT_RASTER_FLAG_SDF.

  This work was Anuj Verma's GSoC 2020 project.

• A new, experimental API is now available for surfacing properties
  of 'COLR' v1 color fonts (as the name says, this is an extension
  to the 'COLR' table for outline color fonts using the SFNT
  container format). 'COLR' v1 fonts are a recently proposed
  addition to OFF and OpenType; specification work currently happens
  in

  https://github.com/googlefonts/colr-gradients-spec/

  'COLR' v1 is expected to be merged to OpenType; the ISO
  standardisation process for adding 'COLR' v1 as an amendment to
  OFF is underway.

  Functions similar to the already existing 'COLR' API have been
  added to access the corresponding data.

  FT_Get_Color_Glyph_Paint
  Retrieve the root paint for a given glyph ID.

  FT_Get_Paint_Layers
  Access the layers of a PaintColrLayers table.

  FT_Get_Colorline_Stops
  Retrieve the 'color stops' on a color line. As an input, a
  color stop iterator gets used, which in turn is retrieved from
  a paint.

  FT_Get_Paint
  Dereference an FT_OpaquePaint object and retrieve the
  corresponding FT_COLR_Paint object, which contains details
  on how to draw the respective 'COLR' v1 Paint table.

II. MISCELLANEOUS

• FreeType has moved its infrastructure to

  https://gitlab.freedesktop.org/freetype

  A side effect is that the git repositories are now called
  freetype.git and freetype-demos.git, which by default expand
  to the directories freetype and freetype-demos, respectively.
  The documentation has been updated accordingly.

  FreeType's Savannah repositories will stay; they are now mirrors
  of the 'freedesktop.org' repositories.

• A new function FT_Get_Transform returns the values set by
  FT_Set_Transform.

• A new configuration macro FT_DEBUG_LOGGING is available. It
  provides extended debugging capabilities for FreeType, for example
  showing a time stamp or displaying the component a tracing message
  comes from. See file docs/DEBUG for more information.

  This work was Priyesh Kumar's GSoC 2020 project.

• The legacy Type 1 and CFF engines are further demoted due to lack
  of CFF2 charstring support. You now need to use FT_Property_Set
  to enable them besides the T1_CONFIG_OPTION_OLD_ENGINE and
  CFF_CONFIG_OPTION_OLD_ENGINE options, respectively.

• The experimental 'warp' mode (AF_CONFIG_OPTION_USE_WARPER) for the
  auto-hinter has been removed.

• The smooth rasterizer performance has been improved by >10%. Note
  that due to necessary code changes there might be very subtle
  differences in rendering. They are not visible by the eye,
  however.

• PCF bitmap fonts compressed with LZW (these are usually files with
  the extension .pcf.Z) are now handled correctly.

• Improved Meson build files, including support to build the
  FreeType demo programs.

• A new demo program ftsdf is available to display Signed Distance
  Fields of glyphs.

• The ftlint demo program has been extended to do more testing of
  its input. In particular, it can display horizontal and vertical
  acutances for quality assessment, together with computing MD5
  checksums of rendered glyphs.

  [The acutance measures how sharply the pixel coverage changes at
  glyph edges. For monochrome bitmaps, it is always 2.0 in either
  X or Y direction. For anti-aliased bitmaps, it depends on the
  hinting and the shape of a glyph and might approach or even reach
  value 2.0 for glyphs like 'I', 'L', '+', '-', or '=', while it
  might be lower for glyphs like 'O', 'S', or 'W'.]

• The ttdebug demo program didn't show changed point coordinates
  (bug introduced in version 2.10.3).

• It is now possible to adjust the axis increment for variable fonts
  in the ftmulti demo program.

• It is now possible to change the hinting engine in the ftstring
  demo program.

• The graphical demo programs work better now in native color depth
  on win32 and x11.

Comment 1

[Ryan VanderMeulen [:RyanVM]]

Try push:
https://treeherder.mozilla.org/jobs?repo=try&revision=bbfcf42368a8e909bcdb5a96508d00ecbf46f34a

Comment 2

[Ryan VanderMeulen [:RyanVM]]

Attachment: Bug 1722989 - Update freetype2 to 2.11.0. r=jfkthame

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/e4b2a561a96f
Update freetype2 to 2.11.0. r=jfkthame

Comment 4

[Marian-Vasile Laza]

https://hg.mozilla.org/mozilla-central/rev/e4b2a561a96f