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configure: Conditionalize color font feature for older freetype2

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FT_HAS_COLOR() macro is unavailable in older freetype2 without the color
font feature.

Compile and link a source including FT_HAS_COLOR(); if it fails (which
can happen on older FreeType2) then define FT_HAS_COLOR(x) as (0).

Patch from suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>

Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
This commit is contained in:
Bryce Harrington 2018-04-03 18:01:09 -07:00
parent 38806bc3c0
commit caf6f71d69
1 changed files with 11 additions and 0 deletions
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11
configure.ac
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@ -580,6 +580,17 @@ if test "x$use_ft" = "xyes"; then
AC_CHECK_FUNCS(FT_Get_X11_Font_Format FT_GlyphSlot_Embolden FT_GlyphSlot_Oblique FT_Load_Sfnt_Table FT_Library_SetLcdFilter FT_Get_Var_Design_Coordinates FT_Done_MM_Var)
AC_MSG_CHECKING(for FT_HAS_COLOR)
AC_LINK_IFELSE([AC_LANG_PROGRAM([
#include <ft2build.h>
#include FT_FREETYPE_H
],[
FT_Long has_color = FT_HAS_COLOR( ((FT_Face)NULL) );
])],[AC_MSG_RESULT([yes])],[
AC_DEFINE([FT_HAS_COLOR(x)], [(0)], [Define to (0) if freetype2 does not support color fonts])
AC_MSG_RESULT([no, disable color font (freetype2 >= 2.5.1 is required)])
])
LIBS="$_save_libs"
CFLAGS="$_save_cflags"
fi