Add HB_NO_METRICS and fix HB_TINY build (#1839)

src/hb-config.hh

@@ -66,6 +66,7 @@
 #define HB_NO_LAYOUT_COLLECT_GLYPHS
 #define HB_NO_LAYOUT_UNUSED
 #define HB_NO_MATH
+#define HB_NO_METRICS
 #define HB_NO_MMAP
 #define HB_NO_NAME
 #define HB_NO_OPEN

src/hb-ot-face-table-list.hh

@@ -53,9 +53,7 @@ HB_OT_ACCELERATOR (OT, cmap)
 HB_OT_TABLE (OT, hhea)
 HB_OT_ACCELERATOR (OT, hmtx)
 HB_OT_TABLE (OT, OS2)
-#ifndef HB_NO_OT_FONT_GLYPH_NAMES
 HB_OT_ACCELERATOR (OT, post)
-#endif
 #ifndef HB_NO_NAME
 HB_OT_ACCELERATOR (OT, name)
 #endif

src/hb-ot-metrics-internal.cc

@@ -51,9 +51,14 @@ hb_ot_metrics_get_position_internal (hb_face_t       *face,
 {
   switch (metrics_tag)
   {
+#ifndef HB_NO_VAR
+#define GET_VAR hb_ot_metrics_get_variation (face, metrics_tag)
+#else
+#define GET_VAR 0
+#endif
 #define GET_METRIC(TABLE, ATTR) \
   (face->table.TABLE->has_data () && \
-    (position && (*position = face->table.TABLE->ATTR + face->table.MVAR->get_var (metrics_tag, nullptr, 0)), true))
+    (position && (*position = face->table.TABLE->ATTR + GET_VAR), true))
   case HB_OT_METRICS_HORIZONTAL_ASCENDER:
     return face->table.OS2->use_typo_metrics () ?
 	   GET_METRIC (OS2, sTypoAscender) : GET_METRIC (hhea, ascender);
@@ -89,6 +94,7 @@ hb_ot_metrics_get_position_internal (hb_face_t       *face,
   case HB_OT_METRICS_UNDERLINE_SIZE:              return GET_METRIC (post->table, underlineThickness);
   case HB_OT_METRICS_UNDERLINE_OFFSET:            return GET_METRIC (post->table, underlinePosition);
 #undef GET_METRIC
+#undef GET_VAR
   default:                                        return false;
   }
 }

src/hb-ot-metrics.cc

@@ -24,6 +24,8 @@
 
 #include "hb.hh"
 
+#ifndef HB_NO_METRICS
+
 #include "hb-ot-metrics.hh"
 #include "hb-ot-var-mvar-table.hh"
 #include "hb-ot-face.hh"
@@ -89,6 +91,7 @@ hb_ot_metrics_get_position (hb_font_t       *font,
   }
 }
 
+#ifndef HB_NO_VAR
 /**
  * hb_ot_metrics_get_variation:
  * @face:
@@ -133,3 +136,6 @@ hb_ot_metrics_get_y_variation (hb_font_t *font, hb_ot_metrics_t metrics_tag)
 {
   return font->em_scalef_y (hb_ot_metrics_get_variation (font->face, metrics_tag));
 }
+#endif
+
+#endif