[varfonts] Add FC_VARIABLE

For now, we mark all fonts as non-variable.

fontconfig/fontconfig.h

@@ -99,6 +99,7 @@ typedef int		FcBool;
 #define FC_OUTLINE	    "outline"		/* Bool */
 #define FC_SCALABLE	    "scalable"		/* Bool */
 #define FC_COLOR	    "color"		/* Bool */
+#define FC_VARIABLE	    "variable"		/* Bool */
 #define FC_SCALE	    "scale"		/* double (deprecated) */
 #define FC_SYMBOL	    "symbol"		/* Bool */
 #define FC_DPI		    "dpi"		/* double */

src/fcdefault.c

@@ -39,6 +39,7 @@ static const struct {
     { FC_EMBEDDED_BITMAP_OBJECT,   FcTrue 	},  /* !FC_LOAD_NO_BITMAP */
     { FC_DECORATIVE_OBJECT,	   FcFalse	},
     { FC_SYMBOL_OBJECT,		   FcFalse	},
+    { FC_VARIABLE_OBJECT,	   FcFalse	},
 };
 
 #define NUM_FC_BOOL_DEFAULTS	(int) (sizeof FcBoolDefaults / sizeof FcBoolDefaults[0])

src/fcfreetype.c

@@ -1236,6 +1236,9 @@ FcFreeTypeQueryFace (const FT_Face  face,
 	    goto bail1;
     }
 
+    if (!FcPatternAddBool (pat, FC_VARIABLE, FcFalse))
+	goto bail1;
+
     if (id >> 16)
     {
       unsigned int instance_id = (id >> 16) - 1;

src/fcmatch.c

@@ -250,6 +250,7 @@ typedef enum _FcMatcherPriorityDummy {
 typedef enum _FcMatcherPriority {
     PRI1(FILE),
     PRI1(FONTFORMAT),
+    PRI1(VARIABLE),
     PRI1(SCALABLE),
     PRI1(COLOR),
     PRI1(FOUNDRY),

src/fcobjs.h

@@ -71,4 +71,5 @@ FC_OBJECT (POSTSCRIPT_NAME,	FcTypeString,	FcComparePostScript)
 FC_OBJECT (COLOR,		FcTypeBool,	FcCompareBool)
 FC_OBJECT (SYMBOL,		FcTypeBool,	FcCompareBool)
 FC_OBJECT (FONT_VARIATIONS,	FcTypeString,	NULL)
+FC_OBJECT (VARIABLE,		FcTypeBool,	FcCompareBool)
 /* ^-------------- Add new objects here. */