Commit 84d3df75012a4b5b0b94966bcfaffd73d7f52824
2016-07-11T00:12:11
Implement handling of `FREETYPE_PROPERTIES' environment variable. Recognizing properties follows in another commit. * devel/ftoption.h, include/freetype/config/ftoption.h (FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES): New macro. * include/freetype/config/ftstdlib.h (ft_getenv): New macro. * src/base/ftinit.c (ft_set_default_properties): New function to parse `FREETYPE_PROPERTIES' and calling `ft_property_string_set'. (FT_Init_FreeType): Updated.
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diff --git a/ChangeLog b/ChangeLog
index 0853725..4f917b2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,18 @@
+2016-07-10 Werner Lemberg <wl@gnu.org>
+
+ Implement handling of `FREETYPE_PROPERTIES' environment variable.
+
+ Recognizing properties follows in another commit.
+
+ * devel/ftoption.h, include/freetype/config/ftoption.h
+ (FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES): New macro.
+
+ * include/freetype/config/ftstdlib.h (ft_getenv): New macro.
+
+ * src/base/ftinit.c (ft_set_default_properties): New function to
+ parse `FREETYPE_PROPERTIES' and calling `ft_property_string_set'.
+ (FT_Init_FreeType): Updated.
+
2016-07-09 Werner Lemberg <wl@gnu.org>
Add function `ft_property_string_set'.
diff --git a/devel/ftoption.h b/devel/ftoption.h
index d20df81..a29e464 100644
--- a/devel/ftoption.h
+++ b/devel/ftoption.h
@@ -77,6 +77,36 @@ FT_BEGIN_HEADER
/*************************************************************************/
/* */
+ /* If you enable this configuration option, FreeType recognizes an */
+ /* environment variable called `FREETYPE_PROPERTIES', which can be used */
+ /* to control the various font drivers and modules. The controllable */
+ /* properties are listed in the section `Controlling FreeType Modules' */
+ /* in the reference's table of contents; currently there are properties */
+ /* for the auto-hinter (file `ftautoh.h'), CFF (file `ftcffdrv.h'), and */
+ /* TrueType (file `ftttdrv.h'). */
+ /* */
+ /* `FREETYPE_PROPERTIES' has the following syntax form (broken here into */
+ /* multiple lines for better readability). */
+ /* */
+ /* <optional whitespace> */
+ /* <module-name1> ':' */
+ /* <property-name1> '=' <property-value1> */
+ /* <whitespace> */
+ /* <module-name2> ':' */
+ /* <property-name2> '=' <property-value2> */
+ /* ... */
+ /* */
+ /* Example: */
+ /* */
+ /* FREETYPE_PROPERTIES=truetype:interpreter-version=35 \ */
+ /* cff:no-stem-darkening=1 \ */
+ /* autofitter:warping=1 */
+ /* */
+#define FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES
+
+
+ /*************************************************************************/
+ /* */
/* Uncomment the line below if you want to activate sub-pixel rendering */
/* (a.k.a. LCD rendering, or ClearType) in this build of the library. */
/* */
diff --git a/include/freetype/config/ftoption.h b/include/freetype/config/ftoption.h
index 7dd3f55..80f7e28 100644
--- a/include/freetype/config/ftoption.h
+++ b/include/freetype/config/ftoption.h
@@ -77,6 +77,36 @@ FT_BEGIN_HEADER
/*************************************************************************/
/* */
+ /* If you enable this configuration option, FreeType recognizes an */
+ /* environment variable called `FREETYPE_PROPERTIES', which can be used */
+ /* to control the various font drivers and modules. The controllable */
+ /* properties are listed in the section `Controlling FreeType Modules' */
+ /* in the reference's table of contents; currently there are properties */
+ /* for the auto-hinter (file `ftautoh.h'), CFF (file `ftcffdrv.h'), and */
+ /* TrueType (file `ftttdrv.h'). */
+ /* */
+ /* `FREETYPE_PROPERTIES' has the following syntax form (broken here into */
+ /* multiple lines for better readability). */
+ /* */
+ /* <optional whitespace> */
+ /* <module-name1> ':' */
+ /* <property-name1> '=' <property-value1> */
+ /* <whitespace> */
+ /* <module-name2> ':' */
+ /* <property-name2> '=' <property-value2> */
+ /* ... */
+ /* */
+ /* Example: */
+ /* */
+ /* FREETYPE_PROPERTIES=truetype:interpreter-version=35 \ */
+ /* cff:no-stem-darkening=1 \ */
+ /* autofitter:warping=1 */
+ /* */
+#define FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES
+
+
+ /*************************************************************************/
+ /* */
/* Uncomment the line below if you want to activate sub-pixel rendering */
/* (a.k.a. LCD rendering, or ClearType) in this build of the library. */
/* */
diff --git a/include/freetype/config/ftstdlib.h b/include/freetype/config/ftstdlib.h
index 562e255..58b95a7 100644
--- a/include/freetype/config/ftstdlib.h
+++ b/include/freetype/config/ftstdlib.h
@@ -142,7 +142,8 @@
/**********************************************************************/
-#define ft_atol atol
+#define ft_atol atol
+#define ft_getenv getenv
/**********************************************************************/
diff --git a/src/base/ftinit.c b/src/base/ftinit.c
index c2dd0a7..02ef938 100644
--- a/src/base/ftinit.c
+++ b/src/base/ftinit.c
@@ -226,6 +226,115 @@
}
+#ifdef FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES
+
+#define MAX_LENGTH 128
+
+ /*
+ * Set default properties derived from the `FREETYPE_PROPERTIES'
+ * environment variable.
+ *
+ * `FREETYPE_PROPERTIES' has the following syntax form (broken here into
+ * multiple lines for better readability)
+ *
+ * <optional whitespace>
+ * <module-name1> ':'
+ * <property-name1> '=' <property-value1>
+ * <whitespace>
+ * <module-name2> ':'
+ * <property-name2> '=' <property-value2>
+ * ...
+ *
+ * Example:
+ *
+ * FREETYPE_PROPERTIES=truetype:interpreter-version=35 \
+ * cff:no-stem-darkening=1 \
+ * autofitter:warping=1
+ *
+ */
+
+ static void
+ ft_set_default_properties( FT_Library library )
+ {
+ const char* env;
+ const char* p;
+ const char* q;
+
+ char module_name[MAX_LENGTH + 1];
+ char property_name[MAX_LENGTH + 1];
+ char property_value[MAX_LENGTH + 1];
+
+ int i;
+
+
+ env = ft_getenv( "FREETYPE_PROPERTIES" );
+ if ( !env )
+ return;
+
+ for ( p = env; *p; p++ )
+ {
+ /* skip leading whitespace and separators */
+ if ( *p == ' ' || *p == '\t' )
+ continue;
+
+ /* read module name, followed by `:' */
+ q = p;
+ for ( i = 0; i < MAX_LENGTH; i++ )
+ {
+ if ( !*p || *p == ':' )
+ break;
+ module_name[i] = *p++;
+ }
+ module_name[i] = '\0';
+
+ if ( !*p || *p != ':' || p == q )
+ break;
+
+ /* read property name, followed by `=' */
+ q = ++p;
+ for ( i = 0; i < MAX_LENGTH; i++ )
+ {
+ if ( !*p || *p == '=' )
+ break;
+ property_name[i] = *p++;
+ }
+ property_name[i] = '\0';
+
+ if ( !*p || *p != '=' || p == q )
+ break;
+
+ /* read property value, followed by whitespace (if any) */
+ q = ++p;
+ for ( i = 0; i < MAX_LENGTH; i++ )
+ {
+ if ( !*p || *p == ' ' || *p == '\t' )
+ break;
+ property_value[i] = *p++;
+ }
+ property_value[i] = '\0';
+
+ if ( !( *p == '\0' || *p == ' ' || *p == '\t' ) || p == q )
+ break;
+
+ /* we completely ignore errors */
+ ft_property_string_set( library,
+ module_name,
+ property_name,
+ property_value );
+ }
+ }
+
+#else
+
+ static void
+ ft_set_default_properties( FT_Library library )
+ {
+ FT_UNUSED( library );
+ }
+
+#endif
+
+
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
@@ -256,6 +365,8 @@
else
FT_Add_Default_Modules( *alibrary );
+ ft_set_default_properties( *alibrary );
+
return error;
}