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Expand Cairo and HarfBuzz descriptions

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* etc/NEWS:
* configure.ac: Expand description of Cairo and Harfbuzz
This commit is contained in:
Robert Pluim 2020-01-24 12:04:36 +01:00
parent 1ebe160577
commit 9ba7abe243
2 changed files with 21 additions and 20 deletions
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17
configure.ac
View file

@ -5892,17 +5892,18 @@ you can continue to support by using '$0 --with-pop'.])
fi
if test "${HAVE_XFT}" = yes; then
AC_MSG_WARN([This configuration uses libXft,
which has a number of font rendering issues, and is being considered for
removal in the next release of Emacs. Please consider using Cairo + HarfBuzz
instead (they are auto-detected if the relevant development headers are
installed).])
AC_MSG_WARN([This configuration uses libXft, which has a number of
font rendering issues, and is being considered for removal in the
next release of Emacs. Please consider using Cairo graphics +
HarfBuzz text shaping instead (they are auto-detected if the
relevant development headers are installed).])
fi
if test "${HAVE_CAIRO}" = "yes" && test "${HAVE_HARFBUZZ}" = no; then
AC_MSG_WARN([This configuration uses Cairo, but not HarfBuzz. We
recommend the use of HarfBuzz when using Cairo, please install
HarfBuzz development packages.])
AC_MSG_WARN([This configuration uses the Cairo graphics library,
but not the HarfBuzz font shaping library. We recommend the use
of HarfBuzz when using Cairo, please install HarfBuzz development
packages.])
fi
# Let plain 'make' work.

24
etc/NEWS
View file

@ -24,22 +24,22 @@ applies, and please also update docstrings as needed.
* Installation Changes in Emacs 28.1
** Cairo is now used by default if found.
** Cairo graphics library is now used by default if found.
'--with-cairo' is now the default, if the appropriate development files
are found by 'configure'. Note that building with Cairo means using
Pango instead of libXFT for font support. Since Pango 1.44 has
removed support for bitmapped fonts, this may require you to adjust
your font settings.
Note also that 'FontBackend' settings in ".Xdefaults" or ".Xresources",
or 'font-backend' frame parameter settings in your init files, may need
to be adjusted, as 'xft' is no longer a valid backend when using
Cairo. Use 'ftcrhb' if your Emacs was built with HarfBuzz support,
and 'ftcr' otherwise. You can determine this by checking
'system-configuration-features'. The 'ftcr' backend will still be
available when HarfBuzz is supported, but will not be used by default.
We strongly recommend building with HarBuzz support. 'x' is still a
valid backend.
Note also that 'FontBackend' settings in ".Xdefaults" or
".Xresources", or 'font-backend' frame parameter settings in your init
files, may need to be adjusted, as 'xft' is no longer a valid backend
when using Cairo. Use 'ftcrhb' if your Emacs was built with HarfBuzz
text shaping support, and 'ftcr' otherwise. You can determine this by
checking 'system-configuration-features'. The 'ftcr' backend will
still be available when HarfBuzz is supported, but will not be used by
default. We strongly recommend building with HarBuzz support. 'x' is
still a valid backend.
---
** 'configure' now warns about building with libXft support.
@ -51,8 +51,8 @@ Cairo + HarfBuzz instead.
---
** 'configure' now warns about not using HarfBuzz if using Cairo.
We want to encourage people to use the most modern font features
available, and this is Cairo + HarfBuzz, so 'configure' now recommends
that combination.
available, and this is the Cairo graphics library + HarfBuzz for font
shaping, so 'configure' now recommends that combination.
---
** The ftx font backend driver has been removed.