Adjust atlas sizes to fix Mali400 precision issues

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 "GrFontAtlasSizes.h"
 #include "GrInvariantOutput.h"
@@ skipping 21 matching lines @@
 
         GrGLGPBuilder* pb = args.fPB;
         GrGLVertexBuilder* vsBuilder = pb->getVertexShaderBuilder();
 
         // emit attributes
         vsBuilder->emitAttributes(cte);
 
         GrGLVertToFrag v(kVec2f_GrSLType);
         pb->addVarying("TextureCoords", &v);
         // this is only used with text, so our texture bounds always match the glyph atlas
-        vsBuilder->codeAppendf("%s = vec2(" GR_FONT_ATLAS_RECIP_WIDTH ", "
-                               GR_FONT_ATLAS_RECIP_HEIGHT ")*%s;", v.vsOut(),
-                               cte.inTextureCoords()->fName);
+        if (cte.maskFormat() == kA8_GrMaskFormat) {
+            vsBuilder->codeAppendf("%s = vec2(" GR_FONT_ATLAS_A8_RECIP_WIDTH ", "
+                                   GR_FONT_ATLAS_RECIP_HEIGHT ")*%s;", v.vsOut(),
+                                   cte.inTextureCoords()->fName);
+        } else {
+            vsBuilder->codeAppendf("%s = vec2(" GR_FONT_ATLAS_RECIP_WIDTH ", "
+                                   GR_FONT_ATLAS_RECIP_HEIGHT ")*%s;", v.vsOut(),
+                                   cte.inTextureCoords()->fName);
+        }
 
         // Setup pass through color
         this->setupColorPassThrough(pb, local.fInputColorType, args.fOutputColor, cte.inColor(),
                                     &fColorUniform);
 
         // Setup position
         this->setupPosition(pb, gpArgs, cte.inPosition()->fName, cte.viewMatrix());
 
         // emit transforms
         this->emitTransforms(args.fPB, gpArgs->fPositionVar, cte.inPosition()->fName,
@@ skipping 166 matching lines @@
             break;
         case 2:
             format = kARGB_GrMaskFormat;
             break;
     }
 
     return GrBitmapTextGeoProc::Create(GrRandomColor(random), textures[texIdx], params,
                                        format, random->nextBool(),
                                        GrProcessorUnitTest::TestMatrix(random));
 }