Use unorm shorts for texture coordinates when rendering text.

src/gpu/GrBatchAtlas.h

Index: src/gpu/GrBatchAtlas.h
diff --git a/src/gpu/GrBatchAtlas.h b/src/gpu/GrBatchAtlas.h
index 61fc7e10934c9ccbc4204da520b26ec7d0401e8c..21eda0568d1eaf91fe8cc64e37a4c779e04441c3 100644
--- a/src/gpu/GrBatchAtlas.h
+++ b/src/gpu/GrBatchAtlas.h
@@ -20,6 +20,8 @@ class GrRectanizer;
 struct GrBatchAtlasConfig {
     int numPlotsX() const { return fWidth / fPlotWidth; }
     int numPlotsY() const { return fHeight / fPlotWidth; }
+    int log2Width() const { return SkNextLog2(fWidth); }
+    int log2Height() const { return SkNextLog2(fHeight); }

[joshualitt, 2016/02/18 20:12:11]

is it worth caching these?

[jvanverth1, 2016/02/18 20:21:20]

Yes, that makes sense.

     int fWidth;
     int fHeight;
     int fPlotWidth;