[subset] update the test file for composite, fix an offset calculation

src/hb-ot-glyf-table.hh

@@ -412,7 +412,7 @@ struct glyf
         } while (composite_it.move_to_next());
 
         if ( (uint16_t) last->flags & CompositeGlyphHeader::WE_HAVE_INSTRUCTIONS)
-          *instruction_start = start_offset + ((char *) last - (char *) glyf_table->dataX) + last->get_size();
+          *instruction_start = ((char *) last - (char *) glyf_table->dataX) + last->get_size();
         else
           *instruction_start = end_offset;
         *instruction_end = end_offset;

test/api/test-subset-glyf.c

@@ -143,12 +143,11 @@ test_subset_glyf_strip_hints_simple (void)
   hb_face_destroy (face_ac);
 }
 
-// TODO(rsheeter): test strip hints from composite
 static void
 test_subset_glyf_strip_hints_composite (void)
 {
   hb_face_t *face_components = hb_subset_test_open_font ("fonts/Roboto-Regular.components.ttf");
-  hb_face_t *face_subset = hb_subset_test_open_font ("fonts/Roboto-Regular.components.subset.ttf");
+  hb_face_t *face_subset = hb_subset_test_open_font ("fonts/Roboto-Regular.components.1fc.nohints.ttf");
 
   hb_set_t *codepoints = hb_set_create();
   hb_set_add (codepoints, 0x1fc);
@@ -160,7 +159,7 @@ test_subset_glyf_strip_hints_composite (void)
 
   hb_subset_test_check (face_subset, face_generated_subset, HB_TAG ('g','l','y','f'));
   hb_subset_test_check (face_subset, face_generated_subset, HB_TAG ('l','o','c', 'a'));
-  check_maxp_num_glyphs(face_generated_subset, 4);
+  check_maxp_num_glyphs(face_generated_subset, 4, false);
 
   hb_face_destroy (face_generated_subset);
   hb_face_destroy (face_subset);