Add initial support for OpenType font variations

This commit lets PangoFontDescription carry font variation
information as a string. Only pangocairo has been updated
to make use of this information. We pass it to harfbuzz
for shaping, and we pass it to cairo when creating scaled
fonts.

1 files changed, 13 insertions, 0 deletions

diff --git a/pango/pangofc-fontmap.h b/pango/pangofc-fontmap.h
index 4dab0839..63452a83 100644
--- a/pango/pangofc-fontmap.h
+++ b/pango/pangofc-fontmap.h
@@ -71,6 +71,8 @@ PANGO_AVAILABLE_IN_1_24
 const PangoMatrix *pango_fc_font_key_get_matrix      (const PangoFcFontKey *key);
 PANGO_AVAILABLE_IN_1_24
 gpointer           pango_fc_font_key_get_context_key (const PangoFcFontKey *key);
+PANGO_AVAILABLE_IN_1_40
+const char        *pango_fc_font_key_get_variations  (const PangoFcFontKey *key);
 
 #endif
 
@@ -311,6 +313,17 @@ PangoFontDescription *pango_fc_font_description_from_pattern (FcPattern *pattern
  */
 #define PANGO_FC_FONT_FEATURES "fontfeatures"
 
+/**
+ * PANGO_FC_FONT_VARIATIONS:
+ *
+ * String representing a fontconfig property name that Pango reads from font
+ * patterns to populate list of OpenType font variations to be used for a font.
+ *
+ * The property will have a number of string elements, each of which is the
+ * OpenType axis setting of the form AXIS=VALUE.
+ */
+#define PANGO_FC_FONT_VARIATIONS "fontvariations"
+
 G_END_DECLS
 
 #endif /* __PANGO_FC_FONT_MAP_H__ */