Use GrCoordTransform precision to set uniform matrix precision

src/gpu/gl/builders/GrGLProgramBuilder.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrGLProgramBuilder.h"
 #include "gl/GrGLProgram.h"
 #include "gl/GrGLSLPrettyPrint.h"
@@ skipping 366 matching lines @@
                                         GrGLProcessor::TransformedCoordsArray* outCoords,
                                         GrGLInstalledFragProc* ifp) {
     const GrFragmentProcessor* processor = stage.getProcessor();
     int numTransforms = processor->numTransforms();
     ifp->fTransforms.push_back_n(numTransforms);
 
     for (int t = 0; t < numTransforms; t++) {
         const char* uniName = "StageMatrix";
         GrSLType varyingType = stage.isPerspectiveCoordTransform(t) ? kVec3f_GrSLType :
                                                                       kVec2f_GrSLType;
+        GrSLPrecision precision = processor->coordTransform(t).precision();
+
         SkString suffixedUniName;
         if (0 != t) {
             suffixedUniName.append(uniName);
             suffixedUniName.appendf("_%i", t);
             uniName = suffixedUniName.c_str();
         }
         ifp->fTransforms[t].fHandle = this->addUniform(GrGLProgramBuilder::kVertex_Visibility,
-                                                       kMat33f_GrSLType, kDefault_GrSLPrecision,
+                                                       kMat33f_GrSLType, precision,
                                                        uniName,
                                                        &uniName).toShaderBuilderIndex();
 
         const char* varyingName = "MatrixCoord";
         SkString suffixedVaryingName;
         if (0 != t) {
             suffixedVaryingName.append(varyingName);
             suffixedVaryingName.appendf("_%i", t);
             varyingName = suffixedVaryingName.c_str();
         }
 
         bool useLocalCoords = kLocal_GrCoordSet == processor->coordTransform(t).sourceCoords();
         const char* coords = useLocalCoords ? fVS.localCoords() : fVS.positionCoords();
 
         GrGLVertToFrag v(varyingType);
-        this->addVarying(varyingName, &v, processor->coordTransform(t).precision());
+        this->addVarying(varyingName, &v, precision);
         fCoordVaryings.push_back(TransformVarying(v, uniName, coords));
 
         SkASSERT(kVec2f_GrSLType == varyingType || kVec3f_GrSLType == varyingType);
         SkNEW_APPEND_TO_TARRAY(outCoords, GrGLProcessor::TransformedCoords,
                                (SkString(v.fsIn()), varyingType));
     }
 }
 
 void GrGLProgramBuilder::emitSamplers(const GrProcessor& processor,
                                       GrGLProcessor::TextureSamplerArray* outSamplers,
@@ skipping 120 matching lines @@
 }
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 GrGLInstalledFragProcs::~GrGLInstalledFragProcs() {
     int numProcs = fProcs.count();
     for (int e = 0; e < numProcs; ++e) {
         SkDELETE(fProcs[e]);
     }
 }