Add hb_shape_list_shapers()

src/hb-shape.cc

@@ -66,8 +66,16 @@ static struct static_shaper_list_t
   {
     char *env = getenv ("HB_SHAPER_LIST");
     shaper_list = NULL;
-    if (!env || !*env)
+    if (!env || !*env) {
+    fallback:
+      ASSERT_STATIC ((ARRAY_LENGTH (shapers) + 1) * sizeof (*shaper_list) <= sizeof (static_buffer));
+      shaper_list = (const char **) static_buffer;
+      unsigned int i;
+      for (i = 0; i < ARRAY_LENGTH (shapers); i++)
+        shaper_list[i] = shapers[i].name;
+      shaper_list[i] = NULL;
       return;
+    }
 
     unsigned int count = 3; /* initial, fallback, null */
     for (const char *p = env; (p == strchr (p, ',')) && p++; )
@@ -76,7 +84,7 @@ static struct static_shaper_list_t
     unsigned int len = strlen (env);
 
     if (count > 100 || len > 1000)
-      return;
+      goto fallback;
 
     len += count * sizeof (*shaper_list) + 1;
     char *buffer = len < sizeof (static_buffer) ? static_buffer : (char *) malloc (len);
@@ -100,7 +108,13 @@ static struct static_shaper_list_t
 
   const char **shaper_list;
   char static_buffer[32];
-} env_shaper_list;
+} static_shaper_list;
+
+const char **
+hb_shape_list_shapers (void)
+{
+  return static_shaper_list.shaper_list;
+}
 
 hb_bool_t
 hb_shape_full (hb_font_t           *font,
@@ -111,7 +125,7 @@ hb_shape_full (hb_font_t           *font,
 	       const char         **shaper_list)
 {
   if (likely (!shaper_list))
-    shaper_list = env_shaper_list.shaper_list;
+    shaper_list = static_shaper_list.shaper_list;
 
   if (likely (!shaper_list)) {
     for (unsigned int i = 0; i < ARRAY_LENGTH (shapers); i++)

src/hb-shape.h

@@ -56,6 +56,9 @@ hb_shape_full (hb_font_t           *font,
 	       const char          *shaper_options,
 	       const char         **shaper_list);
 
+const char **
+hb_shape_list_shapers (void);
+
 
 HB_END_DECLS
 

test/Makefile.am

@@ -25,9 +25,11 @@ TEST_PROGS = \
 	test-version \
 	$(NULL)
 
+if HAVE_OT
 TEST_PROGS += \
 	test-ot-tag \
 	$(NULL)
+endif
 
 # Tests for header compilation
 TEST_PROGS += \

test/test-c.c

@@ -43,6 +43,14 @@
 #include <hb-ft.h>
 #endif
 
+#if HAVE_OT
+#include <hb-ot.h>
+#endif
+
+#if HAVE_UNISCRIBE
+#include <hb-uniscribe.h>
+#endif
+
 int
 main (int argc, char **argv)
 {

test/test-shape.c

@@ -138,6 +138,18 @@ test_shape (void)
   hb_font_destroy (font);
 }
 
+static void
+test_shape_list (void)
+{
+  const char **shapers = hb_shape_list_shapers ();
+
+  unsigned int i;
+  for (i = 0; shapers[i]; i++)
+    ;
+
+  g_assert_cmpint (i, >, 1);
+  g_assert (!strcmp (shapers[i - 1], "fallback"));
+}
 
 int
 main (int argc, char **argv)
@@ -145,6 +157,9 @@ main (int argc, char **argv)
   hb_test_init (&argc, &argv);
 
   hb_test_add (test_shape);
+  /* TODO test fallback shaper */
+  /* TODO test shaper_full */
+  hb_test_add (test_shape_list);
 
   return hb_test_run();
 }