Move shader precision modifier check onto GLSLCaps

src/gpu/effects/GrDistanceFieldGeoProc.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 "GrDistanceFieldGeoProc.h"
 #include "GrInvariantOutput.h"
 #include "GrTexture.h"
@@ skipping 15 matching lines @@
         , fColor(GrColor_ILLEGAL)
 #ifdef SK_GAMMA_APPLY_TO_A8
         , fDistanceAdjust(-1.0f)
 #endif
         {}
 
     void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override{
         const GrDistanceFieldA8TextGeoProc& dfTexEffect =
                 args.fGP.cast<GrDistanceFieldA8TextGeoProc>();
         GrGLGPBuilder* pb = args.fPB;
-        GrGLFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder();
+        GrGLFragmentBuilder* fsBuilder = pb->getFragmentShaderBuilder();
         SkAssertResult(fsBuilder->enableFeature(
                 GrGLFragmentShaderBuilder::kStandardDerivatives_GLSLFeature));
 
-        GrGLVertexBuilder* vsBuilder = args.fPB->getVertexShaderBuilder();
+        GrGLVertexBuilder* vsBuilder = pb->getVertexShaderBuilder();
 
         // emit attributes
         vsBuilder->emitAttributes(dfTexEffect);
 
 #ifdef SK_GAMMA_APPLY_TO_A8
         // adjust based on gamma
         const char* distanceAdjustUniName = nullptr;
         // width, height, 1/(3*width)
-        fDistanceAdjustUni = args.fPB->addUniform(GrGLProgramBuilder::kFragment_Visibility,
+        fDistanceAdjustUni = pb->addUniform(GrGLProgramBuilder::kFragment_Visibility,
             kFloat_GrSLType, kDefault_GrSLPrecision,
             "DistanceAdjust", &distanceAdjustUniName);
 #endif
 
         // Setup pass through color
         if (!dfTexEffect.colorIgnored()) {
             if (dfTexEffect.hasVertexColor()) {
                 pb->addPassThroughAttribute(dfTexEffect.inColor(), args.fOutputColor);
             } else {
                 this->setupUniformColor(pb, args.fOutputColor, &fColorUniform);
             }
         }
 
         // Setup position
         this->setupPosition(pb, gpArgs, dfTexEffect.inPosition()->fName, dfTexEffect.viewMatrix(),
                             &fViewMatrixUniform);
 
         // emit transforms
-        this->emitTransforms(args.fPB, gpArgs->fPositionVar, dfTexEffect.inPosition()->fName,
+        this->emitTransforms(pb, gpArgs->fPositionVar, dfTexEffect.inPosition()->fName,
                              args.fTransformsIn, args.fTransformsOut);
 
         // add varyings
         GrGLVertToFrag recipScale(kFloat_GrSLType);
         GrGLVertToFrag st(kVec2f_GrSLType);
         bool isSimilarity = SkToBool(dfTexEffect.getFlags() & kSimilarity_DistanceFieldEffectFlag);
-        args.fPB->addVarying("IntTextureCoords", &st, kHigh_GrSLPrecision);
+        pb->addVarying("IntTextureCoords", &st, kHigh_GrSLPrecision);
         vsBuilder->codeAppendf("%s = %s;", st.vsOut(), dfTexEffect.inTextureCoords()->fName);
 
         // compute numbers to be hardcoded to convert texture coordinates from int to float
         SkASSERT(dfTexEffect.numTextures() == 1);
         GrTexture* atlas = dfTexEffect.textureAccess(0).getTexture();
         SkASSERT(atlas && SkIsPow2(atlas->width()) && SkIsPow2(atlas->height()));
         SkScalar recipWidth = 1.0f / atlas->width();
         SkScalar recipHeight = 1.0f / atlas->height();
 
         GrGLVertToFrag uv(kVec2f_GrSLType);
-        args.fPB->addVarying("TextureCoords", &uv, kHigh_GrSLPrecision);
+        pb->addVarying("TextureCoords", &uv, kHigh_GrSLPrecision);
         vsBuilder->codeAppendf("%s = vec2(%.*f, %.*f) * %s;", uv.vsOut(),
                                GR_SIGNIFICANT_POW2_DECIMAL_DIG, recipWidth,
                                GR_SIGNIFICANT_POW2_DECIMAL_DIG, recipHeight,
                                dfTexEffect.inTextureCoords()->fName);
         
         // Use highp to work around aliasing issues
-        fsBuilder->codeAppend(GrGLShaderVar::PrecisionString(kHigh_GrSLPrecision,
-                                                             pb->ctxInfo().standard()));
+        fsBuilder->codeAppend(GrGLShaderVar::PrecisionString(pb->glslCaps(), kHigh_GrSLPrecision));
         fsBuilder->codeAppendf("vec2 uv = %s;\n", uv.fsIn());
 
         fsBuilder->codeAppend("\tfloat texColor = ");
         fsBuilder->appendTextureLookup(args.fSamplers[0],
                                        "uv",
                                        kVec2f_GrSLType);
         fsBuilder->codeAppend(".r;\n");
         fsBuilder->codeAppend("\tfloat distance = "
                        SK_DistanceFieldMultiplier "*(texColor - " SK_DistanceFieldThreshold ");");
 #ifdef SK_GAMMA_APPLY_TO_A8
@@ skipping 172 matching lines @@
 public:
     GrGLDistanceFieldPathGeoProc()
         : fViewMatrix(SkMatrix::InvalidMatrix())
         , fColor(GrColor_ILLEGAL)
         , fTextureSize(SkISize::Make(-1, -1)) {}
 
     void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override{
         const GrDistanceFieldPathGeoProc& dfTexEffect = args.fGP.cast<GrDistanceFieldPathGeoProc>();
 
         GrGLGPBuilder* pb = args.fPB;
-        GrGLFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder();
+        GrGLFragmentBuilder* fsBuilder = pb->getFragmentShaderBuilder();
         SkAssertResult(fsBuilder->enableFeature(
                                      GrGLFragmentShaderBuilder::kStandardDerivatives_GLSLFeature));
 
-        GrGLVertexBuilder* vsBuilder = args.fPB->getVertexShaderBuilder();
+        GrGLVertexBuilder* vsBuilder = pb->getVertexShaderBuilder();
 
         // emit attributes
         vsBuilder->emitAttributes(dfTexEffect);
 
         GrGLVertToFrag v(kVec2f_GrSLType);
-        args.fPB->addVarying("TextureCoords", &v, kHigh_GrSLPrecision);
+        pb->addVarying("TextureCoords", &v, kHigh_GrSLPrecision);
 
         // setup pass through color
         if (!dfTexEffect.colorIgnored()) {
             if (dfTexEffect.hasVertexColor()) {
                 pb->addPassThroughAttribute(dfTexEffect.inColor(), args.fOutputColor);
             } else {
                 this->setupUniformColor(pb, args.fOutputColor, &fColorUniform);
             }
         }
         vsBuilder->codeAppendf("%s = %s;", v.vsOut(), dfTexEffect.inTextureCoords()->fName);
 
         // Setup position
         this->setupPosition(pb, gpArgs, dfTexEffect.inPosition()->fName, dfTexEffect.viewMatrix(),
                             &fViewMatrixUniform);
 
         // emit transforms
-        this->emitTransforms(args.fPB, gpArgs->fPositionVar, dfTexEffect.inPosition()->fName,
+        this->emitTransforms(pb, gpArgs->fPositionVar, dfTexEffect.inPosition()->fName,
                              args.fTransformsIn, args.fTransformsOut);
 
         const char* textureSizeUniName = nullptr;
-        fTextureSizeUni = args.fPB->addUniform(GrGLProgramBuilder::kFragment_Visibility,
-                                              kVec2f_GrSLType, kDefault_GrSLPrecision,
-                                              "TextureSize", &textureSizeUniName);
+        fTextureSizeUni = pb->addUniform(GrGLProgramBuilder::kFragment_Visibility,
+                                         kVec2f_GrSLType, kDefault_GrSLPrecision,
+                                         "TextureSize", &textureSizeUniName);
 
         // Use highp to work around aliasing issues
-        fsBuilder->codeAppend(GrGLShaderVar::PrecisionString(kHigh_GrSLPrecision,
-                                                             pb->ctxInfo().standard()));
+        fsBuilder->codeAppend(GrGLShaderVar::PrecisionString(pb->glslCaps(), kHigh_GrSLPrecision));
         fsBuilder->codeAppendf("vec2 uv = %s;", v.fsIn());
 
         fsBuilder->codeAppend("float texColor = ");
         fsBuilder->appendTextureLookup(args.fSamplers[0],
                                        "uv",
                                        kVec2f_GrSLType);
         fsBuilder->codeAppend(".r;");
         fsBuilder->codeAppend("float distance = "
             SK_DistanceFieldMultiplier "*(texColor - " SK_DistanceFieldThreshold ");");
 
-        fsBuilder->codeAppend(GrGLShaderVar::PrecisionString(kHigh_GrSLPrecision,
-                                                             pb->ctxInfo().standard()));
+        fsBuilder->codeAppend(GrGLShaderVar::PrecisionString(pb->glslCaps(), kHigh_GrSLPrecision));
         fsBuilder->codeAppendf("vec2 st = uv*%s;", textureSizeUniName);
         fsBuilder->codeAppend("float afwidth;");
         if (dfTexEffect.getFlags() & kSimilarity_DistanceFieldEffectFlag) {
             // For uniform scale, we adjust for the effect of the transformation on the distance
             // by using the length of the gradient of the texture coordinates. We use st coordinates
             // to ensure we're mapping 1:1 from texel space to pixel space.
 
             // this gives us a smooth step across approximately one fragment
             fsBuilder->codeAppend("afwidth = abs(" SK_DistanceFieldAAFactor "*dFdy(st.y));");
         } else {
@@ skipping 146 matching lines @@
     GrGLDistanceFieldLCDTextGeoProc()
         : fViewMatrix(SkMatrix::InvalidMatrix()), fColor(GrColor_ILLEGAL) {
         fDistanceAdjust = GrDistanceFieldLCDTextGeoProc::DistanceAdjust::Make(1.0f, 1.0f, 1.0f);
     }
 
     void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override{
         const GrDistanceFieldLCDTextGeoProc& dfTexEffect =
                 args.fGP.cast<GrDistanceFieldLCDTextGeoProc>();
         GrGLGPBuilder* pb = args.fPB;
 
-        GrGLVertexBuilder* vsBuilder = args.fPB->getVertexShaderBuilder();
+        GrGLVertexBuilder* vsBuilder = pb->getVertexShaderBuilder();
 
         // emit attributes
         vsBuilder->emitAttributes(dfTexEffect);
 
         // setup pass through color
         if (!dfTexEffect.colorIgnored()) {
             this->setupUniformColor(pb, args.fOutputColor, &fColorUniform);
         }
 
         // Setup position
         this->setupPosition(pb, gpArgs, dfTexEffect.inPosition()->fName, dfTexEffect.viewMatrix(),
                             &fViewMatrixUniform);
 
         // emit transforms
-        this->emitTransforms(args.fPB, gpArgs->fPositionVar, dfTexEffect.inPosition()->fName,
+        this->emitTransforms(pb, gpArgs->fPositionVar, dfTexEffect.inPosition()->fName,
                              args.fTransformsIn, args.fTransformsOut);
 
         // set up varyings
         bool isUniformScale = SkToBool(dfTexEffect.getFlags() & kUniformScale_DistanceFieldEffectMask);
         GrGLVertToFrag recipScale(kFloat_GrSLType);
         GrGLVertToFrag st(kVec2f_GrSLType);
-        args.fPB->addVarying("IntTextureCoords", &st, kHigh_GrSLPrecision);
+        pb->addVarying("IntTextureCoords", &st, kHigh_GrSLPrecision);
         vsBuilder->codeAppendf("%s = %s;", st.vsOut(), dfTexEffect.inTextureCoords()->fName);
 
         // compute numbers to be hardcoded to convert texture coordinates from int to float
         SkASSERT(dfTexEffect.numTextures() == 1);
         GrTexture* atlas = dfTexEffect.textureAccess(0).getTexture();
         SkASSERT(atlas && SkIsPow2(atlas->width()) && SkIsPow2(atlas->height()));
         SkScalar recipWidth = 1.0f / atlas->width();
         SkScalar recipHeight = 1.0f / atlas->height();
 
         GrGLVertToFrag uv(kVec2f_GrSLType);
-        args.fPB->addVarying("TextureCoords", &uv, kHigh_GrSLPrecision);
+        pb->addVarying("TextureCoords", &uv, kHigh_GrSLPrecision);
         vsBuilder->codeAppendf("%s = vec2(%.*f, %.*f) * %s;", uv.vsOut(),
                                GR_SIGNIFICANT_POW2_DECIMAL_DIG, recipWidth,
                                GR_SIGNIFICANT_POW2_DECIMAL_DIG, recipHeight,
                                dfTexEffect.inTextureCoords()->fName);
 
         // add frag shader code
-        GrGLFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder();
+        GrGLFragmentBuilder* fsBuilder = pb->getFragmentShaderBuilder();
 
         SkAssertResult(fsBuilder->enableFeature(
                 GrGLFragmentShaderBuilder::kStandardDerivatives_GLSLFeature));
 
         // create LCD offset adjusted by inverse of transform
         // Use highp to work around aliasing issues
-        fsBuilder->codeAppend(GrGLShaderVar::PrecisionString(kHigh_GrSLPrecision,
-                                                             pb->ctxInfo().standard()));
+        fsBuilder->codeAppend(GrGLShaderVar::PrecisionString(pb->glslCaps(), kHigh_GrSLPrecision));
         fsBuilder->codeAppendf("vec2 uv = %s;\n", uv.fsIn());
-        fsBuilder->codeAppend(GrGLShaderVar::PrecisionString(kHigh_GrSLPrecision,
-                                                             pb->ctxInfo().standard()));
+        fsBuilder->codeAppend(GrGLShaderVar::PrecisionString(pb->glslCaps(), kHigh_GrSLPrecision));
 
         SkScalar lcdDelta = 1.0f / (3.0f * atlas->width());
         if (dfTexEffect.getFlags() & kBGR_DistanceFieldEffectFlag) {
             fsBuilder->codeAppendf("float delta = -%.*f;\n", SK_FLT_DECIMAL_DIG, lcdDelta);
         } else {
             fsBuilder->codeAppendf("float delta = %.*f;\n", SK_FLT_DECIMAL_DIG, lcdDelta);
         }
         if (isUniformScale) {
             fsBuilder->codeAppendf("float dy = abs(dFdy(%s.y));", st.fsIn());
             fsBuilder->codeAppend("vec2 offset = vec2(dy*delta, 0.0);");
@@ skipping 22 matching lines @@
         fsBuilder->codeAppend("\ttexColor = ");
         fsBuilder->appendTextureLookup(args.fSamplers[0], "uv_adjusted", kVec2f_GrSLType);
         fsBuilder->codeAppend(";\n");
         fsBuilder->codeAppend("\tdistance.z = texColor.r;\n");
 
         fsBuilder->codeAppend("\tdistance = "
            "vec3(" SK_DistanceFieldMultiplier ")*(distance - vec3(" SK_DistanceFieldThreshold"));");
 
         // adjust width based on gamma
         const char* distanceAdjustUniName = nullptr;
-        fDistanceAdjustUni = args.fPB->addUniform(GrGLProgramBuilder::kFragment_Visibility,
+        fDistanceAdjustUni = pb->addUniform(GrGLProgramBuilder::kFragment_Visibility,
             kVec3f_GrSLType, kDefault_GrSLPrecision,
             "DistanceAdjust", &distanceAdjustUniName);
         fsBuilder->codeAppendf("distance -= %s;", distanceAdjustUniName);
 
         // To be strictly correct, we should compute the anti-aliasing factor separately
         // for each color component. However, this is only important when using perspective
         // transformations, and even then using a single factor seems like a reasonable
         // trade-off between quality and speed.
         fsBuilder->codeAppend("float afwidth;");
         if (isUniformScale) {
@@ skipping 142 matching lines @@
     uint32_t flags = kUseLCD_DistanceFieldEffectFlag;
     flags |= d->fRandom->nextBool() ? kUniformScale_DistanceFieldEffectMask : 0;
     flags |= d->fRandom->nextBool() ? kBGR_DistanceFieldEffectFlag : 0;
     return GrDistanceFieldLCDTextGeoProc::Create(GrRandomColor(d->fRandom),
                                                  GrTest::TestMatrix(d->fRandom),
                                                  d->fTextures[texIdx], params,
                                                  wa,
                                                  flags,
                                                  d->fRandom->nextBool());
 }