kc3-lang/freetype/src/base

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  Commit

• Hash : 4694ea2b
  Author :
  Date : 2009-09-02T13:06:33
  

  Improve vertical metrics calculation (Savannah bug #27364).
  
  The calculation of `vertBearingX' is not defined in the OTF font
  spec so FreeType does a `best effort' attempt.  However, this value
  is defined in the PDF and PostScript specs, and that algorithm is
  better than the one FreeType currently uses:
  
    FreeType: Use the middle of the bounding box as the X coordinate
              of the vertical origin.
  
    Adobe PDF spec: Use the middle of the horizontal advance vector as
                    the X coordinate of the vertical origin.
  
  FreeType's algorithm goes wrong if you have a really small glyph
  (like the full-width, circle-like dot at the end of the sentence, as
  used in CJK scripts) with large bearings.  With the FreeType
  algorithm this dot gets centered on the baseline; with the PDF
  algorithm it gets the correct location (in the top right).  Note
  that this is a serious issue, it's like printing the dot at the end
  of a Roman sentence at the center of the textline instead of on the
  baseline like it should. So i believe the PDF spec's algorithm
  should be used in FreeType as well.
  
  The `vertBearingY' value for such small glyphs is also very strange
  if no `vmtx' information is present, since the height of the bbox is
  not representable for the height of the glyph visually (the
  whitespace up to the baseline is part of the glyph).  The fix also
  includes some code for a better estimate of `vertBearingY'.
  
  * src/base/ftobjs.c (ft_synthesize_vertical_metrics): `vertBearingX'
  is now calculated as described by the Adobe PDF Spec.  Estimate for
  `vertBearingY' now works better for small glyphs completely above or
  below the baseline into account.
  
  * src/cff/cffgload.c (cff_slot_load): `vertBearingX' is now
  calculated as described by the Adobe PDF Spec.  Vertical metrics
  information was always ignored when FT_CONFIG_OPTION_OLD_INTERNALS
  was not defined.
  
  * src/truetype/ttgload.c (compute_glyph_metrics): `vertBearingX' is
  now calculated as described by the Adobe PDF Spec.
  

• Files

• Jamfile
• basepic.c
• basepic.h
• ftadvanc.c
• ftapi.c
• ftbase.c
• ftbase.h
• ftbbox.c
• ftbdf.c
• ftbitmap.c
• ftcalc.c
• ftcid.c
• ftdbgmem.c
• ftdebug.c
• ftfstype.c
• ftgasp.c
• ftgloadr.c
• ftglyph.c
• ftgxval.c
• ftinit.c
• ftlcdfil.c
• ftmac.c
• ftmm.c
• ftobjs.c
• ftotval.c
• ftoutln.c
• ftpatent.c
• ftpfr.c
• ftpic.c
• ftrfork.c
• ftsnames.c
• ftstream.c
• ftstroke.c
• ftsynth.c
• ftsystem.c
• fttrigon.c
• fttype1.c
• ftutil.c
• ftwinfnt.c
• ftxf86.c
• rules.mk

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• Git HTTP	https://git.kmx.io/kc3-lang/freetype.git
  Git SSH	git@git.kmx.io:kc3-lang/freetype.git
  Public access ?	public
  Description	https://gitlab.freedesktop.org/freetype/freetype
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