Use unorm shorts for texture coordinates when rendering text.

src/gpu/text/GrBatchFontCache.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrBatchFontCache.h"
 #include "GrContext.h"
 #include "GrGpu.h"
@@ skipping 30 matching lines @@
 GrBatchFontCache::GrBatchFontCache(GrContext* context)
     : fContext(context)
     , fPreserveStrike(nullptr) {
     for (int i = 0; i < kMaskFormatCount; ++i) {
         fAtlases[i] = nullptr;
     }
 
     // setup default atlas configs
     fAtlasConfigs[kA8_GrMaskFormat].fWidth = 2048;
     fAtlasConfigs[kA8_GrMaskFormat].fHeight = 2048;
+    fAtlasConfigs[kA8_GrMaskFormat].fLog2Width = 11;
+    fAtlasConfigs[kA8_GrMaskFormat].fLog2Height = 11;
     fAtlasConfigs[kA8_GrMaskFormat].fPlotWidth = 512;
     fAtlasConfigs[kA8_GrMaskFormat].fPlotHeight = 256;
 
     fAtlasConfigs[kA565_GrMaskFormat].fWidth = 1024;
     fAtlasConfigs[kA565_GrMaskFormat].fHeight = 2048;
+    fAtlasConfigs[kA565_GrMaskFormat].fLog2Width = 10;
+    fAtlasConfigs[kA565_GrMaskFormat].fLog2Height = 11;
     fAtlasConfigs[kA565_GrMaskFormat].fPlotWidth = 256;
     fAtlasConfigs[kA565_GrMaskFormat].fPlotHeight = 256;
 
     fAtlasConfigs[kARGB_GrMaskFormat].fWidth = 1024;
     fAtlasConfigs[kARGB_GrMaskFormat].fHeight = 2048;
+    fAtlasConfigs[kARGB_GrMaskFormat].fLog2Width = 10;
+    fAtlasConfigs[kARGB_GrMaskFormat].fLog2Height = 11;
     fAtlasConfigs[kARGB_GrMaskFormat].fPlotWidth = 256;
     fAtlasConfigs[kARGB_GrMaskFormat].fPlotHeight = 256;
 }
 
 GrBatchFontCache::~GrBatchFontCache() {
     SkTDynamicHash<GrBatchTextStrike, GrFontDescKey>::Iter iter(&fCache);
     while (!iter.done()) {
         (*iter).fIsAbandoned = true;
         (*iter).unref();
         ++iter;
@@ skipping 156 matching lines @@
 
     bool success = fBatchFontCache->addToAtlas(this, &glyph->fID, target, expectedMaskFormat,
                                                glyph->width(), glyph->height(),
                                                storage.get(), &glyph->fAtlasLocation);
     if (success) {
         SkASSERT(GrBatchAtlas::kInvalidAtlasID != glyph->fID);
         fAtlasedGlyphs++;
     }
     return success;
 }