Remove some TODO items

TODO

@@ -3,15 +3,9 @@ General fixes:
 
 - mask propagation (when ligation, "or" the masks).
 
-- fail_shaper that always fails.
-
-- Make map in setup_masks() const, etc.
-
 - Warn at compile time (and runtime with HB_DEBUG?) if no Unicode / font
   funcs found / set.
 
-- In hb_shape(), assert if direction is INVALID.
-
 - Fix TT 'kern' on/off and GPOS interaction (move kerning before GPOS).
 
 - Do proper rounding when scaling from font space?  May be a non-issue.
@@ -20,23 +14,12 @@ General fixes:
   * init/medi/fina/isol for non-cursive scripts
   * vkna,hkna etc for kana, etc
 
-- Move non-native direction and normalization handling to the generic non-OT
-  layer, such that other backends can use (Uniscribe doesn't need this).
-
-- Convert NBSP into space glyph.
-
 - Add Pango backend?
 
 - Add ICUlayout backend?
 
 - Add ICUlayout API?
 
-- Add Old HarfBuzz backend?
-
-- Add Old HarfBuzz API?
-
-- Add namespace to avoid type clashes with Windows
-
 
 API issues to fix before 1.0:
 ============================
@@ -111,13 +94,3 @@ Tests to write:
 - hb_set_t
 
 - hb_cache_t and relatives
-
-
-Optimizations:
-=============
-
-- Avoid allocating blob objects internally for for_data() faces?
-
-- Add caching layer to hb-ft?
-
-- Cache feature-less shape plans internally on the face.

src/hb-shape.cc

@@ -87,6 +87,8 @@ hb_shape_full (hb_font_t          *font,
 
   buffer->guess_properties ();
 
+  assert (buffer->props.direction != HB_DIRECTION_INVALID);
+
   hb_shape_plan_t *shape_plan = hb_shape_plan_create_cached (font->face, &buffer->props, features, num_features, shaper_list);
   hb_bool_t res = hb_shape_plan_execute (shape_plan, font, buffer, features, num_features);
   hb_shape_plan_destroy (shape_plan);