[autofit] Trace stem widths.

* src/autofit/aflatin.c (af_latin_metrics_init_widths): Add some
FT_TRACE calls.

ChangeLog

@@ -1,3 +1,10 @@
+2012-11-15  Werner Lemberg  <wl@gnu.org>
+
+	[autofit] Trace stem widths.
+
+	* src/autofit/aflatin.c (af_latin_metrics_init_widths): Add some
+	FT_TRACE calls.
+
 2012-11-13  Werner Lemberg  <wl@gnu.org>
 
 	[cff] Add support for OpenType Collections (OTC).

src/autofit/aflatin.c

@@ -60,6 +60,9 @@
     AF_GlyphHintsRec  hints[1];
 
 
+    FT_TRACE5(( "standard widths computation\n"
+                "===========================\n\n" ));
+
     af_glyph_hints_init( hints, face->memory );
 
     metrics->axis[AF_DIMENSION_HORZ].width_count = 0;
@@ -78,6 +81,9 @@
       if ( glyph_index == 0 )
         goto Exit;
 
+      FT_TRACE5(( "standard character: 0x%X (glyph index %d)\n",
+                  metrics->root.clazz->standard_char, glyph_index ));
+
       error = FT_Load_Glyph( face, glyph_index, FT_LOAD_NO_SCALE );
       if ( error || face->glyph->outline.n_points <= 0 )
         goto Exit;
@@ -161,9 +167,28 @@
         axis->edge_distance_threshold = stdw / 5;
         axis->standard_width          = stdw;
         axis->extra_light             = 0;
+
+#ifdef FT_DEBUG_LEVEL_TRACE
+        {
+          FT_UInt  i;
+
+
+          FT_TRACE5(( "%s widths:\n",
+                      dim == AF_DIMENSION_VERT ? "horizontal"
+                                               : "vertical" ));
+
+          FT_TRACE5(( "  %d (standard)", axis->standard_width ));
+          for ( i = 1; i < axis->width_count; i++ )
+            FT_TRACE5(( " %d", axis->widths[i].org ));
+
+          FT_TRACE5(( "\n" ));
+        }
+#endif
       }
     }
 
+    FT_TRACE5(( "\n" ));
+
     af_glyph_hints_done( hints );
   }