Use unorm shorts for texture coordinates when rendering text.

src/gpu/effects/GrBitmapTextGeoProc.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrBitmapTextGeoProc.h"
 #include "GrInvariantOutput.h"
 #include "GrTexture.h"
@@ skipping 13 matching lines @@
 
         GrGLSLVertexBuilder* vertBuilder = args.fVertBuilder;
         GrGLSLVaryingHandler* varyingHandler = args.fVaryingHandler;
         GrGLSLUniformHandler* uniformHandler = args.fUniformHandler;
 
         // emit attributes
         varyingHandler->emitAttributes(cte);
 
         // compute numbers to be hardcoded to convert texture coordinates from int to float
         SkASSERT(cte.numTextures() == 1);
-        GrTexture* atlas = cte.textureAccess(0).getTexture();
+        SkDEBUGCODE(GrTexture* atlas = cte.textureAccess(0).getTexture());
         SkASSERT(atlas && SkIsPow2(atlas->width()) && SkIsPow2(atlas->height()));
-        SkScalar recipWidth = 1.0f / atlas->width();
-        SkScalar recipHeight = 1.0f / atlas->height();
 
         GrGLSLVertToFrag v(kVec2f_GrSLType);
-        varyingHandler->addVarying("TextureCoords", &v);
-        vertBuilder->codeAppendf("%s = vec2(%.*f, %.*f) * %s;", v.vsOut(),
-                                 GR_SIGNIFICANT_POW2_DECIMAL_DIG, recipWidth,
-                                 GR_SIGNIFICANT_POW2_DECIMAL_DIG, recipHeight,
+        varyingHandler->addVarying("TextureCoords", &v, kHigh_GrSLPrecision);
+        vertBuilder->codeAppendf("%s = %s;", v.vsOut(),
                                  cte.inTextureCoords()->fName);
 
         GrGLSLPPFragmentBuilder* fragBuilder = args.fFragBuilder;
         // Setup pass through color
         if (!cte.colorIgnored()) {
             if (cte.hasVertexColor()) {
                 varyingHandler->addPassThroughAttribute(cte.inColor(), args.fOutputColor);
             } else {
                 this->setupUniformColor(fragBuilder, uniformHandler, args.fOutputColor,
                                         &fColorUniform);
@@ skipping 89 matching lines @@
     , fMaskFormat(format) {
     this->initClassID<GrBitmapTextGeoProc>();
     fInPosition = &this->addVertexAttrib(Attribute("inPosition", kVec2f_GrVertexAttribType));
 
     bool hasVertexColor = kA8_GrMaskFormat == fMaskFormat ||
                           kA565_GrMaskFormat == fMaskFormat;
     if (hasVertexColor) {
         fInColor = &this->addVertexAttrib(Attribute("inColor", kVec4ub_GrVertexAttribType));
     }
     fInTextureCoords = &this->addVertexAttrib(Attribute("inTextureCoords",
-                                                        kVec2s_GrVertexAttribType));
+                                                        kVec2us_GrVertexAttribType,
+                                                        kHigh_GrSLPrecision));
     this->addTextureAccess(&fTextureAccess);
 }
 
 void GrBitmapTextGeoProc::getGLSLProcessorKey(const GrGLSLCaps& caps,
                                               GrProcessorKeyBuilder* b) const {
     GrGLBitmapTextGeoProc::GenKey(*this, caps, b);
 }
 
 GrGLSLPrimitiveProcessor* GrBitmapTextGeoProc::createGLSLInstance(const GrGLSLCaps& caps) const {
     return new GrGLBitmapTextGeoProc();
@@ skipping 28 matching lines @@
             break;
         case 2:
             format = kARGB_GrMaskFormat;
             break;
     }
 
     return GrBitmapTextGeoProc::Create(GrRandomColor(d->fRandom), d->fTextures[texIdx], params,
                                        format, GrTest::TestMatrix(d->fRandom),
                                        d->fRandom->nextBool());
 }