Fix int16_t for glyphs, const glyphs, and clarify glyph loop.

src/pdf/SkPDFFont.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include <ctype.h>
 
 #include "SkData.h"
@@ skipping 1009 matching lines @@
     fDescriptor->insert("FontBBox", makeFontBBox(fFontInfo->fBBox,
                                                  fFontInfo->fEmSize))->unref();
 
     if (defaultWidth > 0) {
         fDescriptor->insertScalar("MissingWidth",
                 scaleFromFontUnits(defaultWidth, emSize));
     }
     return true;
 }
 
-void SkPDFFont::adjustGlyphRangeForSingleByteEncoding(int16_t glyphID) {
+void SkPDFFont::adjustGlyphRangeForSingleByteEncoding(uint16_t glyphID) {
     // Single byte glyph encoding supports a max of 255 glyphs.
     fFirstGlyphID = glyphID - (glyphID - 1) % 255;
     if (fLastGlyphID > fFirstGlyphID + 255 - 1) {
         fLastGlyphID = fFirstGlyphID + 255 - 1;
     }
 }
 
 bool SkPDFFont::FontRec::operator==(const SkPDFFont::FontRec& b) const {
     if (fFontID != b.fFontID) {
         return false;
@@ skipping 376 matching lines @@
 
 SkPDFType3Font::SkPDFType3Font(const SkAdvancedTypefaceMetrics* info,
                                SkTypeface* typeface,
                                uint16_t glyphID)
         : SkPDFFont(info, typeface, NULL) {
     populate(glyphID);
 }
 
 SkPDFType3Font::~SkPDFType3Font() {}
 
-bool SkPDFType3Font::populate(int16_t glyphID) {
+bool SkPDFType3Font::populate(uint16_t glyphID) {
     SkPaint paint;
     paint.setTypeface(typeface());
     paint.setTextSize(1000);
     SkAutoGlyphCache autoCache(paint, NULL, NULL);
     SkGlyphCache* cache = autoCache.getCache();
     // If fLastGlyphID isn't set (because there is not fFontInfo), look it up.
     if (lastGlyphID() == 0) {
         setLastGlyphID(cache->getGlyphCount() - 1);
     }
 
@@ skipping 51 matching lines @@
 
     insert("FontBBox", makeFontBBox(bbox, 1000))->unref();
     insertInt("FirstChar", 1);
     insertInt("LastChar", lastGlyphID() - firstGlyphID() + 1);
     insert("Widths", widthArray.get());
     insertName("CIDToGIDMap", "Identity");
 
     populateToUnicodeTable(NULL);
     return true;
 }