Add more specialized fragment builders

src/gpu/effects/GrOvalEffect.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 "GrOvalEffect.h"
 
 #include "GrFragmentProcessor.h"
@@ skipping 102 matching lines @@
 void GLCircleEffect::emitCode(EmitArgs& args) {
     const CircleEffect& ce = args.fFp.cast<CircleEffect>();
     const char *circleName;
     // The circle uniform is (center.x, center.y, radius + 0.5, 1 / (radius + 0.5)) for regular
     // fills and (..., radius - 0.5, 1 / (radius - 0.5)) for inverse fills.
     fCircleUniform = args.fUniformHandler->addUniform(kFragment_GrShaderFlag,
                                                       kVec4f_GrSLType, kDefault_GrSLPrecision,
                                                       "circle",
                                                       &circleName);
 
-    GrGLSLFragmentBuilder* fragBuilder = args.fFragBuilder;
+    GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
     const char* fragmentPos = fragBuilder->fragmentPosition();
 
     SkASSERT(kHairlineAA_GrProcessorEdgeType != ce.getEdgeType());
     // TODO: Right now the distance to circle caclulation is performed in a space normalized to the
     // radius and then denormalized. This is to prevent overflow on devices that have a "real"
     // mediump. It'd be nice to only to this on mediump devices but we currently don't have the
     // caps here.
     if (GrProcessorEdgeTypeIsInverseFill(ce.getEdgeType())) {
         fragBuilder->codeAppendf("float d = (length((%s.xy - %s.xy) * %s.w) - 1.0) * %s.z;",
                                  circleName, fragmentPos, circleName, circleName);
@@ skipping 160 matching lines @@
     // that is normalized by the larger radius. The scale uniform will be scale, 1/scale. The
     // inverse squared radii uniform values are already in this normalized space. The center is
     // not.
     const char* scaleName = nullptr;
     if (args.fGLSLCaps->floatPrecisionVaries()) {
         fScaleUniform = args.fUniformHandler->addUniform(
             kFragment_GrShaderFlag, kVec2f_GrSLType, kDefault_GrSLPrecision,
             "scale", &scaleName);
     }
 
-    GrGLSLFragmentBuilder* fragBuilder = args.fFragBuilder;
+    GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
     const char* fragmentPos = fragBuilder->fragmentPosition();
 
     // d is the offset to the ellipse center
     fragBuilder->codeAppendf("vec2 d = %s.xy - %s.xy;", fragmentPos, ellipseName);
     if (scaleName) {
         fragBuilder->codeAppendf("d *= %s.y;", scaleName);
     }
     fragBuilder->codeAppendf("vec2 Z = d * %s.zw;", ellipseName);
     // implicit is the evaluation of (x/rx)^2 + (y/ry)^2 - 1.
     fragBuilder->codeAppend("float implicit = dot(Z, d) - 1.0;");
@@ skipping 86 matching lines @@
         w /= 2;
         return CircleEffect::Create(edgeType, SkPoint::Make(oval.fLeft + w, oval.fTop + w), w);
     } else {
         w /= 2;
         h /= 2;
         return EllipseEffect::Create(edgeType, SkPoint::Make(oval.fLeft + w, oval.fTop + h), w, h);
     }
 
     return nullptr;
 }