Provide last resort for fCapHeight in SkFontHost_FreeType::onGetAdvancedTypefaceMetrics.

src/ports/SkFontHost_FreeType.cpp

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmap.h"
 #include "SkCanvas.h"
@@ skipping 584 matching lines @@
         bool got_m, got_x;
         got_m = GetLetterCBox(face, 'M', &m_bbox);
         got_x = GetLetterCBox(face, 'X', &x_bbox);
         if (got_m && got_x) {
             info->fCapHeight = (m_bbox.yMax - m_bbox.yMin + x_bbox.yMax -
                     x_bbox.yMin) / 2;
         } else if (got_m && !got_x) {
             info->fCapHeight = m_bbox.yMax - m_bbox.yMin;
         } else if (!got_m && got_x) {
             info->fCapHeight = x_bbox.yMax - x_bbox.yMin;
+        } else {
+            // Last resort, use the ascent.
+            info->fCapHeight = info->fAscent;
         }
     }
 
     info->fBBox = SkIRect::MakeLTRB(face->bbox.xMin, face->bbox.yMax,
                                     face->bbox.xMax, face->bbox.yMin);
 
     if (!canEmbed(face) || !FT_IS_SCALABLE(face) ||
             info->fType == SkAdvancedTypefaceMetrics::kOther_Font) {
         perGlyphInfo = SkAdvancedTypefaceMetrics::kNo_PerGlyphInfo;
     }
@@ skipping 1047 matching lines @@
         *style = (SkTypeface::Style) tempStyle;
     }
     if (isFixedPitch) {
         *isFixedPitch = FT_IS_FIXED_WIDTH(face);
     }
 
     FT_Done_Face(face);
     FT_Done_FreeType(library);
     return true;
 }