Move edge GrEffects to locally defined classes

src/gpu/effects/GrCircleEdgeEffect.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 "GrCircleEdgeEffect.h"
-#include "gl/GrGLEffect.h"
-#include "gl/GrGLSL.h"
-#include "GrTBackendEffectFactory.h"
-
-class GrGLCircleEdgeEffect : public GrGLEffect {
-public:
-    GrGLCircleEdgeEffect(const GrBackendEffectFactory& factory, const GrDrawEffect&)
-    : INHERITED (factory) {}
-
-    virtual void emitCode(GrGLShaderBuilder* builder,
-                          const GrDrawEffect& drawEffect,
-                          EffectKey key,
-                          const char* outputColor,
-                          const char* inputColor,
-                          const TextureSamplerArray& samplers) SK_OVERRIDE {
-        const GrCircleEdgeEffect& circleEffect = drawEffect.castEffect<GrCircleEdgeEffect>();
-        const char *vsName, *fsName;
-        builder->addVarying(kVec4f_GrSLType, "CircleEdge", &vsName, &fsName);
-
-        const SkString* attrName =
-            builder->getEffectAttributeName(drawEffect.getVertexAttribIndices()[0]);
-        builder->vsCodeAppendf("\t%s = %s;\n", vsName, attrName->c_str());
-
-        builder->fsCodeAppendf("\tfloat d = distance(%s.xy, %s.xy);\n",
-                               builder->fragmentPosition(), fsName);
-        builder->fsCodeAppendf("\tfloat edgeAlpha = clamp(%s.z - d, 0.0, 1.0);\n", fsName);
-        if (circleEffect.isStroked()) {
-            builder->fsCodeAppendf("\tfloat innerAlpha = clamp(d - %s.w, 0.0, 1.0);\n", fsName);
-            builder->fsCodeAppend("\tedgeAlpha *= innerAlpha;\n");
-        }
-        SkString modulate;
-        GrGLSLModulate4f(&modulate, inputColor, "edgeAlpha");
-        builder->fsCodeAppendf("\t%s = %s;\n", outputColor, modulate.c_str());
-    }
-
-    static inline EffectKey GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&) {
-        const GrCircleEdgeEffect& circleEffect = drawEffect.castEffect<GrCircleEdgeEffect>();
-
-        return circleEffect.isStroked() ? 0x1 : 0x0;
-    }
-
-    virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE {
-    }
-
-private:
-    typedef GrGLEffect INHERITED;
-};
-
-///////////////////////////////////////////////////////////////////////////////
-
-GrCircleEdgeEffect::GrCircleEdgeEffect(bool stroke) : GrEffect() {
-    this->addVertexAttrib(kVec4f_GrSLType);
-    fStroke = stroke;
-}
-
-void GrCircleEdgeEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
-    *validFlags = 0;
-}
-
-const GrBackendEffectFactory& GrCircleEdgeEffect::getFactory() const {
-    return GrTBackendEffectFactory<GrCircleEdgeEffect>::getInstance();
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-GR_DEFINE_EFFECT_TEST(GrCircleEdgeEffect);
-
-GrEffectRef* GrCircleEdgeEffect::TestCreate(SkMWCRandom* random,
-                                            GrContext* context,
-                                            const GrDrawTargetCaps&,
-                                            GrTexture* textures[]) {
-    return GrCircleEdgeEffect::Create(random->nextBool());
-}