Move shader precision out of GrShaderVar

Review URL: https://codereview.chromium.org/777443003

15 files changed, 88 insertions, 83 deletions

diff --git a/include/gpu/GrCoordTransform.h b/include/gpu/GrCoordTransform.h
index b00c8a465a..775089cab8 100644
--- a/include/gpu/GrCoordTransform.h
+++ b/include/gpu/GrCoordTransform.h
@@ -72,7 +72,7 @@ public:
      * Create a transformation that applies the matrix to a coord set.
      */
     GrCoordTransform(GrCoordSet sourceCoords, const SkMatrix& m,
-                     GrShaderVar::Precision precision = GrShaderVar::kDefault_Precision) {
+                     GrSLPrecision precision = kDefault_GrSLPrecision) {
         SkDEBUGCODE(fInProcessor = false);
         this->reset(sourceCoords, m, precision);
     }
@@ -85,7 +85,7 @@ public:
 
     void reset(GrCoordSet, const SkMatrix&, const GrTexture*);
     void reset(GrCoordSet sourceCoords, const SkMatrix& m,
-               GrShaderVar::Precision precision = GrShaderVar::kDefault_Precision);
+               GrSLPrecision precision = kDefault_GrSLPrecision);
 
     GrCoordTransform& operator= (const GrCoordTransform& that) {
         SkASSERT(!fInProcessor);
@@ -117,7 +117,7 @@ public:
     GrCoordSet sourceCoords() const { return fSourceCoords; }
     const SkMatrix& getMatrix() const { return fMatrix; }
     bool reverseY() const { return fReverseY; }
-    GrShaderVar::Precision precision() const { return fPrecision; }
+    GrSLPrecision precision() const { return fPrecision; }
 
     /** Useful for effects that want to insert a texture matrix that is implied by the texture
         dimensions */
@@ -132,7 +132,7 @@ private:
     GrCoordSet              fSourceCoords;
     SkMatrix                fMatrix;
     bool                    fReverseY;
-    GrShaderVar::Precision  fPrecision;
+    GrSLPrecision           fPrecision;
     typedef SkNoncopyable INHERITED;
 
 #ifdef SK_DEBUG
diff --git a/include/gpu/GrShaderVar.h b/include/gpu/GrShaderVar.h
index 05ae36aab8..3ef24b07b6 100644
--- a/include/gpu/GrShaderVar.h
+++ b/include/gpu/GrShaderVar.h
@@ -34,19 +34,6 @@ public:
         kVaryingOut_TypeModifier
     };
 
-    enum Precision {
-        kLow_Precision,
-        kMedium_Precision,
-        kHigh_Precision,
-
-        // Default precision is medium. This is because on OpenGL ES 2 highp support is not
-        // guaranteed. On (non-ES) OpenGL the specifiers have no effect on precision.
-        kDefault_Precision = kMedium_Precision,
-
-        kLast_Precision = kHigh_Precision
-    };
-    static const int kPrecisionCount = kLast_Precision + 1;
-
     /**
      * Defaults to a float with no precision specifier
      */
@@ -54,11 +41,11 @@ public:
         : fType(kFloat_GrSLType)
         , fTypeModifier(kNone_TypeModifier)
         , fCount(kNonArray)
-        , fPrecision(kDefault_Precision) {
+        , fPrecision(kDefault_GrSLPrecision) {
     }
 
     GrShaderVar(const SkString& name, GrSLType type, int arrayCount = kNonArray,
-                Precision precision = kDefault_Precision)
+                GrSLPrecision precision = kDefault_GrSLPrecision)
         : fType(type)
         , fTypeModifier(kNone_TypeModifier)
         , fName(name)
@@ -68,7 +55,7 @@ public:
     }
 
     GrShaderVar(const char* name, GrSLType type, int arrayCount = kNonArray,
-                  Precision precision = kDefault_Precision)
+                GrSLPrecision precision = kDefault_GrSLPrecision)
         : fType(type)
         , fTypeModifier(kNone_TypeModifier)
         , fName(name)
@@ -78,7 +65,7 @@ public:
     }
 
     GrShaderVar(const char* name, GrSLType type, TypeModifier typeModifier,
-                  int arrayCount = kNonArray, Precision precision = kDefault_Precision)
+                  int arrayCount = kNonArray, GrSLPrecision precision = kDefault_GrSLPrecision)
         : fType(type)
         , fTypeModifier(typeModifier)
         , fName(name)
@@ -101,7 +88,7 @@ public:
     void set(GrSLType type,
              TypeModifier typeModifier,
              const SkString& name,
-             Precision precision = kDefault_Precision) {
+             GrSLPrecision precision = kDefault_GrSLPrecision) {
         SkASSERT(kVoid_GrSLType != type);
         fType = type;
         fTypeModifier = typeModifier;
@@ -116,7 +103,7 @@ public:
     void set(GrSLType type,
              TypeModifier typeModifier,
              const char* name,
-             Precision precision = kDefault_Precision) {
+             GrSLPrecision precision = kDefault_GrSLPrecision) {
         SkASSERT(kVoid_GrSLType != type);
         fType = type;
         fTypeModifier = typeModifier;
@@ -132,7 +119,7 @@ public:
              TypeModifier typeModifier,
              const SkString& name,
              int count,
-             Precision precision = kDefault_Precision) {
+             GrSLPrecision precision = kDefault_GrSLPrecision) {
         SkASSERT(kVoid_GrSLType != type);
         fType = type;
         fTypeModifier = typeModifier;
@@ -148,7 +135,7 @@ public:
              TypeModifier typeModifier,
              const char* name,
              int count,
-             Precision precision = kDefault_Precision) {
+             GrSLPrecision precision = kDefault_GrSLPrecision) {
         SkASSERT(kVoid_GrSLType != type);
         fType = type;
         fTypeModifier = typeModifier;
@@ -217,19 +204,19 @@ public:
     /**
      * Get the precision of the var
      */
-    Precision getPrecision() const { return fPrecision; }
+    GrSLPrecision getPrecision() const { return fPrecision; }
 
     /**
      * Set the precision of the var
      */
-    void setPrecision(Precision p) { fPrecision = p; }
+    void setPrecision(GrSLPrecision p) { fPrecision = p; }
 
 protected:
     GrSLType        fType;
     TypeModifier    fTypeModifier;
     SkString        fName;
     int             fCount;
-    Precision       fPrecision;
+    GrSLPrecision   fPrecision;
 };
 
 #endif
diff --git a/include/gpu/GrTypesPriv.h b/include/gpu/GrTypesPriv.h
index 83d85612b9..2a8d4c3255 100644
--- a/include/gpu/GrTypesPriv.h
+++ b/include/gpu/GrTypesPriv.h
@@ -39,6 +39,24 @@ enum GrShaderType {
 static const int kGrShaderTypeCount = kLastkFragment_GrShaderType + 1;
 
 /**
+ * Precisions of shader language variables. Not all shading languages support precisions or actually
+ * vary the internal precision based on the qualifiers.
+ */
+enum GrSLPrecision {
+    kLow_GrSLPrecision,
+    kMedium_GrSLPrecision,
+    kHigh_GrSLPrecision,
+
+    // Default precision is medium. This is because on OpenGL ES 2 highp support is not
+    // guaranteed. On (non-ES) OpenGL the specifiers have no effect on precision.
+    kDefault_GrSLPrecision = kMedium_GrSLPrecision,
+
+    kLast_GrSLPrecision = kHigh_GrSLPrecision
+};
+
+static const int kGrSLPrecisionCount = kLast_GrSLPrecision + 1;
+
+/**
  * Gets the vector size of the SLType. Returns -1 for void, matrices, and samplers.
  */
 static inline int GrSLTypeVectorCount(GrSLType type) {
diff --git a/src/gpu/GrCoordTransform.cpp b/src/gpu/GrCoordTransform.cpp
index 53285a27eb..5bb36fcf76 100644
--- a/src/gpu/GrCoordTransform.cpp
+++ b/src/gpu/GrCoordTransform.cpp
@@ -22,7 +22,7 @@ void GrCoordTransform::reset(GrCoordSet sourceCoords, const SkMatrix& m, const G
     // increased. Our rule is that we want at least 4 subpixel values in the representation for
     // coords between 0 to 1. Note that this still might not be enough when drawing with repeat
     // or mirror-repeat modes but that case can be arbitrarily bad. 
-    fPrecision = GrShaderVar::kDefault_Precision;
+    fPrecision = kDefault_GrSLPrecision;
     if (texture->getContext()) {
         const GrDrawTargetCaps* caps = texture->getContext()->getGpu()->caps();
         if (caps->floatPrecisionVaries()) {
@@ -36,10 +36,10 @@ void GrCoordTransform::reset(GrCoordSet sourceCoords, const SkMatrix& m, const G
                 if ((2 << info->fBits) / maxD > 4) {
                     break;
                 }
-                if (GrShaderVar::kHigh_Precision == fPrecision) {
+                if (kHigh_GrSLPrecision == fPrecision) {
                     break;
                 }
-                GrShaderVar::Precision nextP = static_cast<GrShaderVar::Precision>(fPrecision + 1);
+                GrSLPrecision nextP = static_cast<GrSLPrecision>(fPrecision + 1);
                 info = &caps->getFloatShaderPrecisionInfo(kFragment_GrShaderType, nextP);
                 if (!info->supported()) {
                     break;
@@ -52,7 +52,7 @@ void GrCoordTransform::reset(GrCoordSet sourceCoords, const SkMatrix& m, const G
 
 void GrCoordTransform::reset(GrCoordSet sourceCoords,
                              const SkMatrix& m,
-                             GrShaderVar::Precision precision) {
+                             GrSLPrecision precision) {
     SkASSERT(!fInProcessor);
     fSourceCoords = sourceCoords;
     fMatrix = m;
diff --git a/src/gpu/GrDrawTarget.cpp b/src/gpu/GrDrawTarget.cpp
index ed54bf9514..0d6a388609 100644
--- a/src/gpu/GrDrawTarget.cpp
+++ b/src/gpu/GrDrawTarget.cpp
@@ -1046,7 +1046,7 @@ GrDrawTargetCaps& GrDrawTargetCaps::operator=(const GrDrawTargetCaps& other) {
 
     fShaderPrecisionVaries = other.fShaderPrecisionVaries;
     for (int s = 0; s < kGrShaderTypeCount; ++s) {
-        for (int p = 0; p < GrShaderVar::kPrecisionCount; ++p) {
+        for (int p = 0; p < kGrSLPrecisionCount; ++p) {
             fFloatPrecisions[s][p] = other.fFloatPrecisions[s][p];
         }
     }
@@ -1085,13 +1085,13 @@ static const char* shader_type_to_string(GrShaderType type) {
     return "";
 }
 
-static const char* precision_to_string(GrShaderVar::Precision p) {
+static const char* precision_to_string(GrSLPrecision p) {
     switch (p) {
-        case GrShaderVar::kLow_Precision:
+        case kLow_GrSLPrecision:
             return "low";
-        case GrShaderVar::kMedium_Precision:
+        case kMedium_GrSLPrecision:
             return "medium";
-        case GrShaderVar::kHigh_Precision:
+        case kHigh_GrSLPrecision:
             return "high";
     }
     return "";
@@ -1177,9 +1177,9 @@ SkString GrDrawTargetCaps::dump() const {
     for (int s = 0; s < kGrShaderTypeCount; ++s) {
         GrShaderType shaderType = static_cast<GrShaderType>(s);
         r.appendf("\t%s:\n", shader_type_to_string(shaderType));
-        for (int p = 0; p < GrShaderVar::kPrecisionCount; ++p) {
+        for (int p = 0; p < kGrSLPrecisionCount; ++p) {
             if (fFloatPrecisions[s][p].supported()) {
-                GrShaderVar::Precision precision = static_cast<GrShaderVar::Precision>(p);
+                GrSLPrecision precision = static_cast<GrSLPrecision>(p);
                 r.appendf("\t\t%s: log_low: %d log_high: %d bits: %d\n",
                           precision_to_string(precision),
                           fFloatPrecisions[s][p].fLogRangeLow,
diff --git a/src/gpu/GrDrawTargetCaps.h b/src/gpu/GrDrawTargetCaps.h
index ae6a9ed749..1bd18b081e 100644
--- a/src/gpu/GrDrawTargetCaps.h
+++ b/src/gpu/GrDrawTargetCaps.h
@@ -22,7 +22,7 @@ public:
     SK_DECLARE_INST_COUNT(GrDrawTargetCaps)
 
     /** Info about shader variable precision within a given shader stage. That is, this info
-        is relevant to a float (or vecNf) variable declared with a GrShaderVar::Precision 
+        is relevant to a float (or vecNf) variable declared with a GrSLPrecision
         in a given GrShaderType. The info here is hoisted from the OpenGL spec. */
     struct PrecisionInfo {
         PrecisionInfo() {
@@ -127,7 +127,7 @@ public:
      * called.
      */
     const PrecisionInfo& getFloatShaderPrecisionInfo(GrShaderType shaderType,
-                                                     GrShaderVar::Precision precision) const {
+                                                     GrSLPrecision precision) const {
         return fFloatPrecisions[shaderType][precision];
     };
 
@@ -175,7 +175,7 @@ protected:
     bool fConfigTextureSupport[kGrPixelConfigCnt];
 
     bool fShaderPrecisionVaries;
-    PrecisionInfo fFloatPrecisions[kGrShaderTypeCount][GrShaderVar::kPrecisionCount];
+    PrecisionInfo fFloatPrecisions[kGrShaderTypeCount][kGrSLPrecisionCount];
 
 private:
     static uint32_t CreateUniqueID();
diff --git a/src/gpu/effects/GrBezierEffect.cpp b/src/gpu/effects/GrBezierEffect.cpp
index ebbb8d7f88..5abd29324d 100644
--- a/src/gpu/effects/GrBezierEffect.cpp
+++ b/src/gpu/effects/GrBezierEffect.cpp
@@ -353,7 +353,7 @@ void GrGLCubicEffect::emitCode(const EmitArgs& args) {
     const GrCubicEffect& gp = args.fGP.cast<GrCubicEffect>();
 
     GrGLVertToFrag v(kVec4f_GrSLType);
-    args.fPB->addVarying("CubicCoeffs", &v, GrGLShaderVar::kHigh_Precision);
+    args.fPB->addVarying("CubicCoeffs", &v, kHigh_GrSLPrecision);
     vsBuilder->codeAppendf("%s = %s;", v.vsOut(), gp.inCubicCoeffs()->fName);
 
     // setup coord outputs
@@ -366,14 +366,14 @@ void GrGLCubicEffect::emitCode(const EmitArgs& args) {
 
     GrGLGPFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder();
 
-    GrGLShaderVar edgeAlpha("edgeAlpha", kFloat_GrSLType, 0, GrGLShaderVar::kHigh_Precision);
-    GrGLShaderVar dklmdx("dklmdx", kVec3f_GrSLType, 0, GrGLShaderVar::kHigh_Precision);
-    GrGLShaderVar dklmdy("dklmdy", kVec3f_GrSLType, 0, GrGLShaderVar::kHigh_Precision);
-    GrGLShaderVar dfdx("dfdx", kFloat_GrSLType, 0, GrGLShaderVar::kHigh_Precision);
-    GrGLShaderVar dfdy("dfdy", kFloat_GrSLType, 0, GrGLShaderVar::kHigh_Precision);
-    GrGLShaderVar gF("gF", kVec2f_GrSLType, 0, GrGLShaderVar::kHigh_Precision);
-    GrGLShaderVar gFM("gFM", kFloat_GrSLType, 0, GrGLShaderVar::kHigh_Precision);
-    GrGLShaderVar func("func", kFloat_GrSLType, 0, GrGLShaderVar::kHigh_Precision);
+    GrGLShaderVar edgeAlpha("edgeAlpha", kFloat_GrSLType, 0, kHigh_GrSLPrecision);
+    GrGLShaderVar dklmdx("dklmdx", kVec3f_GrSLType, 0, kHigh_GrSLPrecision);
+    GrGLShaderVar dklmdy("dklmdy", kVec3f_GrSLType, 0, kHigh_GrSLPrecision);
+    GrGLShaderVar dfdx("dfdx", kFloat_GrSLType, 0, kHigh_GrSLPrecision);
+    GrGLShaderVar dfdy("dfdy", kFloat_GrSLType, 0, kHigh_GrSLPrecision);
+    GrGLShaderVar gF("gF", kVec2f_GrSLType, 0, kHigh_GrSLPrecision);
+    GrGLShaderVar gFM("gFM", kFloat_GrSLType, 0, kHigh_GrSLPrecision);
+    GrGLShaderVar func("func", kFloat_GrSLType, 0, kHigh_GrSLPrecision);
 
     fsBuilder->declAppend(edgeAlpha);
     fsBuilder->declAppend(dklmdx);
diff --git a/src/gpu/effects/GrConfigConversionEffect.cpp b/src/gpu/effects/GrConfigConversionEffect.cpp
index e146411e32..55ae54e9ae 100644
--- a/src/gpu/effects/GrConfigConversionEffect.cpp
+++ b/src/gpu/effects/GrConfigConversionEffect.cpp
@@ -29,7 +29,7 @@ public:
                           const TransformedCoordsArray& coords,
                           const TextureSamplerArray& samplers) SK_OVERRIDE {
         // Using highp for GLES here in order to avoid some precision issues on specific GPUs.
-        GrGLShaderVar tmpVar("tmpColor", kVec4f_GrSLType, 0, GrGLShaderVar::kHigh_Precision);
+        GrGLShaderVar tmpVar("tmpColor", kVec4f_GrSLType, 0, kHigh_GrSLPrecision);
         SkString tmpDecl;
         tmpVar.appendDecl(builder->ctxInfo(), &tmpDecl);
 
diff --git a/src/gpu/gl/GrGLCaps.cpp b/src/gpu/gl/GrGLCaps.cpp
index a510cb456b..79c99c224a 100644
--- a/src/gpu/gl/GrGLCaps.cpp
+++ b/src/gpu/gl/GrGLCaps.cpp
@@ -776,13 +776,13 @@ void GrGLCaps::initStencilFormats(const GrGLContextInfo& ctxInfo) {
     fStencilVerifiedColorConfigs.push_back_n(fStencilFormats.count());
 }
 
-static GrGLenum precision_to_gl_float_type(GrShaderVar::Precision p) {
+static GrGLenum precision_to_gl_float_type(GrSLPrecision p) {
     switch (p) {
-        case GrShaderVar::kLow_Precision:
+        case kLow_GrSLPrecision:
             return GR_GL_LOW_FLOAT;
-        case GrShaderVar::kMedium_Precision:
+        case kMedium_GrSLPrecision:
             return GR_GL_MEDIUM_FLOAT;
-        case GrShaderVar::kHigh_Precision:
+        case kHigh_GrSLPrecision:
             return GR_GL_HIGH_FLOAT;
     }
     SkFAIL("Unknown precision.");
@@ -811,8 +811,8 @@ void GrGLCaps::initShaderPrecisionTable(const GrGLContextInfo& ctxInfo, const Gr
                 GrGLenum glShader = shader_type_to_gl_shader(shaderType);
                 PrecisionInfo* first = NULL;
                 fShaderPrecisionVaries = false;
-                for (int p = 0; p < GrShaderVar::kPrecisionCount; ++p) {
-                    GrShaderVar::Precision precision = static_cast<GrShaderVar::Precision>(p);
+                for (int p = 0; p < kGrSLPrecisionCount; ++p) {
+                    GrSLPrecision precision = static_cast<GrSLPrecision>(p);
                     GrGLenum glPrecision = precision_to_gl_float_type(precision);
                     GrGLint range[2];
                     GrGLint bits;
@@ -835,7 +835,7 @@ void GrGLCaps::initShaderPrecisionTable(const GrGLContextInfo& ctxInfo, const Gr
         fShaderPrecisionVaries = false;
         for (int s = 0; s < kGrShaderTypeCount; ++s) {
             if (kGeometry_GrShaderType != s || fGeometryShaderSupport) {
-                for (int p = 0; p < GrShaderVar::kPrecisionCount; ++p) {
+                for (int p = 0; p < kGrSLPrecisionCount; ++p) {
                     fFloatPrecisions[s][p].fLogRangeLow = 127;
                     fFloatPrecisions[s][p].fLogRangeHigh = 127;
                     fFloatPrecisions[s][p].fBits = 23;
diff --git a/src/gpu/gl/GrGLProgramDesc.cpp b/src/gpu/gl/GrGLProgramDesc.cpp
index 16de1eab22..068386c3aa 100644
--- a/src/gpu/gl/GrGLProgramDesc.cpp
+++ b/src/gpu/gl/GrGLProgramDesc.cpp
@@ -69,7 +69,7 @@ enum {
     kTransformKeyBits    = kMatrixTypeKeyBits + kPrecisionBits + 1,
 };
 
-GR_STATIC_ASSERT(GrShaderVar::kHigh_Precision < (1 << kPrecisionBits));
+GR_STATIC_ASSERT(kHigh_GrSLPrecision < (1 << kPrecisionBits));
 
 /**
  * We specialize the vertex code for each of these matrix types.
@@ -95,7 +95,7 @@ static uint32_t gen_transform_key(const GrPendingFragmentStage& stage, bool useE
             key |= kPositionCoords_Flag;
         }
 
-        GR_STATIC_ASSERT(GrShaderVar::kPrecisionCount <= (1 << kPrecisionBits));
+        GR_STATIC_ASSERT(kGrSLPrecisionCount <= (1 << kPrecisionBits));
         key |= (coordTransform.precision() << kPrecisionShift);
 
         key <<= kTransformKeyBits * t;
diff --git a/src/gpu/gl/GrGLShaderVar.h b/src/gpu/gl/GrGLShaderVar.h
index 7705c30db0..5d4d70025e 100644
--- a/src/gpu/gl/GrGLShaderVar.h
+++ b/src/gpu/gl/GrGLShaderVar.h
@@ -37,7 +37,7 @@ public:
     }
 
     GrGLShaderVar(const char* name, GrSLType type, int arrayCount = kNonArray,
-                  Precision precision = kDefault_Precision)
+                  GrSLPrecision precision = kDefault_GrSLPrecision)
         : GrShaderVar(name, type, arrayCount, precision)
         , fOrigin(kDefault_Origin)
         , fUseUniformFloatArrays(USE_UNIFORM_FLOAT_ARRAYS) {
@@ -47,7 +47,7 @@ public:
     }
 
     GrGLShaderVar(const char* name, GrSLType type, TypeModifier typeModifier,
-                  int arrayCount = kNonArray, Precision precision = kDefault_Precision)
+                  int arrayCount = kNonArray, GrSLPrecision precision = kDefault_GrSLPrecision)
         : GrShaderVar(name, type, typeModifier, arrayCount, precision)
         , fOrigin(kDefault_Origin)
         , fUseUniformFloatArrays(USE_UNIFORM_FLOAT_ARRAYS) {
@@ -83,7 +83,7 @@ public:
     void set(GrSLType type,
              TypeModifier typeModifier,
              const SkString& name,
-             Precision precision = kDefault_Precision,
+             GrSLPrecision precision = kDefault_GrSLPrecision,
              Origin origin = kDefault_Origin,
              bool useUniformFloatArrays = USE_UNIFORM_FLOAT_ARRAYS) {
         SkASSERT(kVoid_GrSLType != type);
@@ -98,7 +98,7 @@ public:
     void set(GrSLType type,
              TypeModifier typeModifier,
              const char* name,
-             Precision precision = kDefault_Precision,
+             GrSLPrecision precision = kDefault_GrSLPrecision,
              Origin origin = kDefault_Origin,
              bool useUniformFloatArrays = USE_UNIFORM_FLOAT_ARRAYS) {
         SkASSERT(kVoid_GrSLType != type);
@@ -114,7 +114,7 @@ public:
              TypeModifier typeModifier,
              const SkString& name,
              int count,
-             Precision precision = kDefault_Precision,
+             GrSLPrecision precision = kDefault_GrSLPrecision,
              Origin origin = kDefault_Origin,
              bool useUniformFloatArrays = USE_UNIFORM_FLOAT_ARRAYS) {
         SkASSERT(kVoid_GrSLType != type);
@@ -130,7 +130,7 @@ public:
              TypeModifier typeModifier,
              const char* name,
              int count,
-             Precision precision = kDefault_Precision,
+             GrSLPrecision precision = kDefault_GrSLPrecision,
              Origin origin = kDefault_Origin,
              bool useUniformFloatArrays = USE_UNIFORM_FLOAT_ARRAYS) {
         SkASSERT(kVoid_GrSLType != type);
@@ -197,15 +197,15 @@ public:
                      fUseUniformFloatArrays ? "" : ".x");
     }
 
-    static const char* PrecisionString(Precision p, GrGLStandard standard) {
+    static const char* PrecisionString(GrSLPrecision p, GrGLStandard standard) {
         // Desktop GLSL has added precision qualifiers but they don't do anything.
         if (kGLES_GrGLStandard == standard) {
             switch (p) {
-                case kLow_Precision:
+                case kLow_GrSLPrecision:
                     return "lowp ";
-                case kMedium_Precision:
+                case kMedium_GrSLPrecision:
                     return "mediump ";
-                case kHigh_Precision:
+                case kHigh_GrSLPrecision:
                     return "highp ";
                 default:
                     SkFAIL("Unexpected precision type.");
diff --git a/src/gpu/gl/builders/GrGLFragmentShaderBuilder.cpp b/src/gpu/gl/builders/GrGLFragmentShaderBuilder.cpp
index 56bc496532..6de5f696d0 100644
--- a/src/gpu/gl/builders/GrGLFragmentShaderBuilder.cpp
+++ b/src/gpu/gl/builders/GrGLFragmentShaderBuilder.cpp
@@ -16,19 +16,19 @@
 const char* GrGLFragmentShaderBuilder::kDstCopyColorName = "_dstColor";
 static const char* declared_color_output_name() { return "fsColorOut"; }
 static const char* dual_source_output_name() { return "dualSourceOut"; }
-static void append_default_precision_qualifier(GrGLShaderVar::Precision p,
+static void append_default_precision_qualifier(GrSLPrecision p,
                                                GrGLStandard standard,
                                                SkString* str) {
     // Desktop GLSL has added precision qualifiers but they don't do anything.
     if (kGLES_GrGLStandard == standard) {
         switch (p) {
-            case GrGLShaderVar::kHigh_Precision:
+            case kHigh_GrSLPrecision:
                 str->append("precision highp float;\n");
                 break;
-            case GrGLShaderVar::kMedium_Precision:
+            case kMedium_GrSLPrecision:
                 str->append("precision mediump float;\n");
                 break;
-            case GrGLShaderVar::kLow_Precision:
+            case kLow_GrSLPrecision:
                 str->append("precision lowp float;\n");
                 break;
             default:
@@ -131,7 +131,7 @@ const char* GrGLFragmentShaderBuilder::fragmentPosition() {
             fInputs.push_back().set(kVec4f_GrSLType,
                                     GrGLShaderVar::kIn_TypeModifier,
                                     "gl_FragCoord",
-                                    GrGLShaderVar::kDefault_Precision,
+                                    kDefault_GrSLPrecision,
                                     GrGLShaderVar::kUpperLeft_Origin);
             fSetupFragPosition = true;
         }
@@ -306,7 +306,7 @@ bool GrGLFragmentShaderBuilder::compileAndAttachShaders(GrGLuint programId,
     GrGpuGL* gpu = fProgramBuilder->gpu();
     SkString fragShaderSrc(GrGetGLSLVersionDecl(gpu->ctxInfo()));
     fragShaderSrc.append(fExtensions);
-    append_default_precision_qualifier(GrShaderVar::kDefault_Precision,
+    append_default_precision_qualifier(kDefault_GrSLPrecision,
                                        gpu->glStandard(),
                                        &fragShaderSrc);
     fProgramBuilder->appendUniformDecls(GrGLProgramBuilder::kFragment_Visibility, &fragShaderSrc);
@@ -342,7 +342,7 @@ void GrGLFragmentShaderBuilder::bindFragmentShaderLocations(GrGLuint programID)
     }
 }
 
-void GrGLFragmentShaderBuilder::addVarying(GrGLVarying* v, GrGLShaderVar::Precision fsPrec) {
+void GrGLFragmentShaderBuilder::addVarying(GrGLVarying* v, GrSLPrecision fsPrec) {
     v->fFsIn = v->fVsOut;
     if (v->fGsOut) {
         v->fFsIn = v->fGsOut;
diff --git a/src/gpu/gl/builders/GrGLFragmentShaderBuilder.h b/src/gpu/gl/builders/GrGLFragmentShaderBuilder.h
index 226be518c3..03f0e7f7a6 100644
--- a/src/gpu/gl/builders/GrGLFragmentShaderBuilder.h
+++ b/src/gpu/gl/builders/GrGLFragmentShaderBuilder.h
@@ -117,7 +117,7 @@ private:
     /*
      * An internal call for GrGLProgramBuilder to use to add varyings to the vertex shader
      */
-    void addVarying(GrGLVarying*, GrGLShaderVar::Precision);
+    void addVarying(GrGLVarying*, GrSLPrecision);
 
     /**
      * Features that should only be enabled by GrGLFragmentShaderBuilder itself.
diff --git a/src/gpu/gl/builders/GrGLProgramBuilder.cpp b/src/gpu/gl/builders/GrGLProgramBuilder.cpp
index 5ed566fa33..9ce3bb22a6 100644
--- a/src/gpu/gl/builders/GrGLProgramBuilder.cpp
+++ b/src/gpu/gl/builders/GrGLProgramBuilder.cpp
@@ -103,7 +103,7 @@ GrGLProgramBuilder::GrGLProgramBuilder(GrGpuGL* gpu, const GrOptDrawState& optSt
 
 void GrGLProgramBuilder::addVarying(const char* name,
                                     GrGLVarying* varying,
-                                    GrGLShaderVar::Precision fsPrecision) {
+                                    GrSLPrecision fsPrecision) {
     SkASSERT(varying);
     if (varying->vsVarying()) {
         fVS.addVarying(name, varying);
@@ -172,7 +172,7 @@ GrGLProgramDataManager::UniformHandle GrGLProgramBuilder::addUniformArray(uint32
     // to use the default FS precision.
     if ((kVertex_Visibility | kFragment_Visibility) == visibility) {
         // the fragment and vertex precisions must match
-        uni.fVariable.setPrecision(GrShaderVar::kDefault_Precision);
+        uni.fVariable.setPrecision(kDefault_GrSLPrecision);
     }
 
     if (outName) {
diff --git a/src/gpu/gl/builders/GrGLProgramBuilder.h b/src/gpu/gl/builders/GrGLProgramBuilder.h
index b7458b3e8f..7288b94af0 100644
--- a/src/gpu/gl/builders/GrGLProgramBuilder.h
+++ b/src/gpu/gl/builders/GrGLProgramBuilder.h
@@ -134,7 +134,7 @@ public:
      */
     virtual void addVarying(const char* name,
                             GrGLVarying*,
-                            GrGLShaderVar::Precision fsPrecision=GrGLShaderVar::kDefault_Precision) = 0;
+                            GrSLPrecision fsPrecision = kDefault_GrSLPrecision) = 0;
 
     /*
      * This call can be used by GP to pass an attribute through all shaders directly to 'output' in
@@ -218,7 +218,7 @@ public:
     virtual void addVarying(
             const char* name,
             GrGLVarying*,
-            GrGLShaderVar::Precision fsPrecision=GrGLShaderVar::kDefault_Precision) SK_OVERRIDE;
+            GrSLPrecision fsPrecision = kDefault_GrSLPrecision) SK_OVERRIDE;
 
     virtual void addPassThroughAttribute(const GrGeometryProcessor::GrAttribute*,
                                          const char* output) SK_OVERRIDE;