added support for PLS path rendering

src/gpu/batches/GrPLSPathRenderer.cpp

+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "GrPLSPathRenderer.h"
+
+#include "GrBatchFlushState.h"
+#include "GrBatchTest.h"
+#include "GrCaps.h"
+#include "GrContext.h"
+#include "GrDefaultGeoProcFactory.h"
+#include "GrPLSGeometryProcessor.h"
+#include "GrInvariantOutput.h"
+#include "GrPathUtils.h"
+#include "GrProcessor.h"
+#include "GrPipelineBuilder.h"
+#include "GrStrokeInfo.h"
+#include "GrTessellatingPathRenderer.h"
+#include "SkGeometry.h"
+#include "SkPathPriv.h"
+#include "SkString.h"
+#include "SkTSort.h"
+#include "SkTraceEvent.h"
+#include "batches/GrVertexBatch.h"
+#include "glsl/GrGLSLGeometryProcessor.h"
+#include "gl/builders/GrGLProgramBuilder.h"
+
+GrPLSPathRenderer::GrPLSPathRenderer() {
+}
+
+struct PLSVertex {
+    SkPoint  fPos;
+    // for triangles, these are the three triangle vertices
+    // for quads, vert1 is the texture UV coords, and vert2 and vert3 are the line segment 
+    // comprising the flat edge of the quad
+    SkPoint  fVert1;
+    SkPoint  fVert2;
+    SkPoint  fVert3;
+    int fWinding;
+};
+typedef SkTArray<PLSVertex, true> PLSVertices;
+
+typedef SkTArray<SkPoint, true> FinishVertices;
+
+static const float kCubicTolerance = 0.5f;
+static const float kConicTolerance = 0.5f;
+
+static const float kBloatSize = 1.0f;
+
+static const float kBloatLimit = 640000.0f;
+
+static void process_line_contour(SkTArray<SkPoint, true>& points,
+                                SkChunkAlloc& alloc, TessellatingVertex** head,
+                                TessellatingVertex** prev) {
+
+    for (int i = 0; i < points.count(); i++) {
+        *prev = append_point_to_contour(points[i], *prev, head, alloc);
+    }
+}
+
+#define kQuadNumVertices 5
+static void add_quad(SkPoint pts[3], PLSVertices& vertices) {
+    SkPoint normal = SkPoint::Make(pts[0].fY - pts[2].fY, 
+                                   pts[2].fX - pts[0].fX);
+    normal.setLength(kBloatSize);
+    SkScalar cross = (pts[1] - pts[0]).cross(pts[2] - pts[0]);
+    if (cross < 0) {
+        normal = -normal;
+    }
+    PLSVertex quad[kQuadNumVertices];
+    quad[0].fPos = pts[0] + normal;
+    quad[1].fPos = pts[0] - normal;
+    quad[2].fPos = pts[1] - normal;
+    quad[3].fPos = pts[2] - normal;
+    quad[4].fPos = pts[2] + normal;
+    for (int i = 0; i < kQuadNumVertices; i++) {
+        quad[i].fWinding = cross < 0 ? 1 : -1;
+        if (cross > 0.0) {
+            quad[i].fVert2 = pts[0];
+            quad[i].fVert3 = pts[2];
+        }
+        else {
+            quad[i].fVert2 = pts[2];
+            quad[i].fVert3 = pts[0];
+        }
+    }
+    GrPathUtils::QuadUVMatrix DevToUV(pts);
+    DevToUV.apply<kQuadNumVertices, sizeof(PLSVertex), sizeof(SkPoint)>(quad);
+    for (int i = 2; i < kQuadNumVertices; i++) {
+        vertices.push_back(quad[0]);
+        vertices.push_back(quad[i - 1]);
+        vertices.push_back(quad[i]);
+    }
+}
+
+/* Used by bloat_tri; outsets a single point. */
+static bool outset(SkPoint* p1, SkPoint p2, SkPoint p3) {
+    SkPoint line1 = *p1 - p2;
+    line1.normalize();
+    SkPoint line2 = *p1 - p3;
+    line2.normalize();
+    // rotate the two line vectors 90 degrees to form the normals, and compute
+    // the dot product of the normals
+    SkScalar dotProd = line1.fY * line2.fY + line1.fX * line2.fX;
+    SkScalar lengthSq = 1.0f / ((1.0f - dotProd) / 2.0f);
+    if (lengthSq > kBloatLimit) {
+        return false;
+    }
+    SkPoint bisector = line1 + line2;
+    bisector.setLength(SkScalarSqrt(lengthSq) * kBloatSize);
+    *p1 += bisector;
+    return true;
+}
+
+/* Bloats a triangle so as to create a border kBloatSize pixels wide all around it. */
+static bool bloat_tri(SkPoint pts[3]) {
+    SkPoint result[3];
+    result[0] = pts[0];
+    if (!outset(&result[0], pts[1], pts[2])) {
+        return false;
+    }
+    result[1] = pts[1];
+    if (!outset(&result[1], pts[0], pts[2])) {
+        return false;
+    }
+    result[2] = pts[2];
+    if (!outset(&result[2], pts[1], pts[0])) {
+        return false;
+    }
+    pts[0] = result[0];
+    pts[1] = result[1];
+    pts[2] = result[2];
+    return true;
+}
+
+static bool get_geometry(const SkPath& path, const SkMatrix& m, PLSVertices& triVertices, 
+                         PLSVertices& quadVertices, GrResourceProvider* resourceProvider,
+                         SkRect bounds) {
+    SkScalar screenSpaceTol = GrPathUtils::kDefaultTolerance;
+    SkScalar tol = GrPathUtils::scaleToleranceToSrc(screenSpaceTol, m, bounds);
+    int contourCnt;
+    int maxPts = GrPathUtils::worstCasePointCount(path, &contourCnt, tol);
+    if (maxPts <= 0) {
+        return 0;
+    }
+    SkAutoTDeleteArray<TessellatingVertex*> contours(new TessellatingVertex* [contourCnt]);
+    TessellatingVertex** currentContour = contours.get();
+    SkChunkAlloc alloc(path.countVerbs() * 24);
+    SkSTArray<15, SkPoint, true> quadPoints;
+    SkPathPriv::FirstDirection dir = SkPathPriv::FirstDirection::kUnknown_FirstDirection;
+    TessellatingVertex* prev = nullptr;
+    TessellatingVertex* head = nullptr;
+    SkPath::Iter iter(path, true);
+    SkTArray<SkPoint, true> points;
+    bool done = false;
+    while (!done) {
+        SkPoint pts[4];
+        SkPath::Verb verb = iter.next(pts);
+        switch (verb) {
+            case SkPath::kMove_Verb:
+                if (points.count() > 0) {
+                    process_line_contour(points, alloc,
+                            &head, &prev);
+                    head->fPrev = prev;
+                    prev->fNext = head;
+                    *currentContour++ = head;
+                    points.reset();
+                }
+                SkASSERT(quadPoints.count() % 3 == 0);
+                for (int i = 0; i < quadPoints.count(); i += 3) {
+                    add_quad(&quadPoints[i], quadVertices);
+                }
+                quadPoints.reset();
+                m.mapPoints(&pts[0], 1);
+                points.push_back(pts[0]);
+                break;
+            case SkPath::kLine_Verb:
+                m.mapPoints(&pts[1], 1);
+                points.push_back(pts[1]);
+                break;
+            case SkPath::kQuad_Verb:
+                m.mapPoints(pts, 3);
+                points.push_back(pts[2]);
+                quadPoints.push_back(pts[0]);
+                quadPoints.push_back(pts[1]);
+                quadPoints.push_back(pts[2]);
+                break;
+            case SkPath::kCubic_Verb: {
+                m.mapPoints(pts, 4);
+                SkSTArray<15, SkPoint, true> quads;
+                GrPathUtils::convertCubicToQuads(pts, kCubicTolerance, false, dir, &quads);
+                int count = quads.count();
+                for (int q = 0; q < count; q += 3) {
+                    points.push_back(quads[q + 2]);
+                    quadPoints.push_back(quads[q]);
+                    quadPoints.push_back(quads[q + 1]);
+                    quadPoints.push_back(quads[q + 2]);
+                }
+                break;
+            }
+            case SkPath::kConic_Verb: {
+                m.mapPoints(pts, 3);
+                SkScalar weight = iter.conicWeight();
+                SkAutoConicToQuads converter;
+                const SkPoint* quads = converter.computeQuads(pts, weight, kConicTolerance);
+                int count = converter.countQuads();
+                for (int i = 0; i < count; ++i) {
+                    points.push_back(quads[2 * i + 2]);
+                    quadPoints.push_back(quads[2 * i]);
+                    quadPoints.push_back(quads[2 * i + 1]);
+                    quadPoints.push_back(quads[2 * i + 2]);
+                }
+                break;
+            }
+            case SkPath::kClose_Verb:
+                if (points.count() > 0) {
+                    process_line_contour(points, alloc,
+                            &head, &prev);
+                    head->fPrev = prev;
+                    prev->fNext = head;
+                    *currentContour++ = head;
+                    points.reset();
+                }
+                head = prev = nullptr;
+                break;
+            case SkPath::kDone_Verb:
+                done = true;
+                break;
+            default: SkASSERT(false);
+        }
+    }
+    if (points.count() > 0) {
+        process_line_contour(points, alloc, &head, &prev);
+        head->fPrev = prev;
+        prev->fNext = head;
+        *currentContour++ = head;
+    }
+    SkASSERT(quadPoints.count() % 3 == 0);
+    for (int i = 0; i < quadPoints.count(); i += 3) {
+        add_quad(&quadPoints[i], quadVertices);
+    }
+    SkASSERT(currentContour - contours.get() == contourCnt);
+
+    Poly* polys = contours_to_polys(contours.get(), contourCnt, bounds, alloc);
+    static const GrUniqueKey::Domain kDomain = GrUniqueKey::GenerateDomain();
+    GrUniqueKey key;
+    GrUniqueKey::Builder builder(&key, kDomain, 2);
+    builder[0] = path.getGenerationID();
+    builder[1] = path.getFillType();
+    builder.finish();
+    WindingVertex* windingVertices;
+    int triVertexCount = polys_to_vertices(polys, SkPath::FillType::kWinding_FillType, true, 
+                                            &windingVertices);
+    for (int i = 0; i < triVertexCount; i += 3) {
+        SkPoint p1 = windingVertices[i].fPos;
+        SkPoint p2 = windingVertices[i + 1].fPos;
+        SkPoint p3 = windingVertices[i + 2].fPos;
+        int winding = windingVertices[i].fWinding;
+        SkASSERT(windingVertices[i + 1].fWinding == winding);
+        SkASSERT(windingVertices[i + 2].fWinding == winding);
+        SkScalar cross = (p2 - p1).cross(p3 - p1);
+        SkPoint bloated[3] = { p1, p2, p3 };
+        if (cross < 0.0f) {
+            SkTSwap(p1, p3);
+        }
+        if (bloat_tri(bloated)) {
+            triVertices.push_back({ bloated[0], p1, p2, p3, winding });
+            triVertices.push_back({ bloated[1], p1, p2, p3, winding });
+            triVertices.push_back({ bloated[2], p1, p2, p3, winding });
+        }
+        else {
+            SkScalar minX = SkTMin(p1.fX, SkTMin(p2.fX, p3.fX)) - 1.0f;
+            SkScalar minY = SkTMin(p1.fY, SkTMin(p2.fY, p3.fY)) - 1.0f;
+            SkScalar maxX = SkTMax(p1.fX, SkTMax(p2.fX, p3.fX)) + 1.0f;
+            SkScalar maxY = SkTMax(p1.fY, SkTMax(p2.fY, p3.fY)) + 1.0f;
+            triVertices.push_back({ { minX, minY }, p1, p2, p3, winding });
+            triVertices.push_back({ { maxX, minY }, p1, p2, p3, winding });
+            triVertices.push_back({ { minX, maxY }, p1, p2, p3, winding });
+            triVertices.push_back({ { maxX, minY }, p1, p2, p3, winding });
+            triVertices.push_back({ { maxX, maxY }, p1, p2, p3, winding });
+            triVertices.push_back({ { minX, maxY }, p1, p2, p3, winding });
+        }
+    }
+    delete[] windingVertices;
+    return triVertexCount > 0 || quadVertices.count() > 0;
+}
+
+class PLSAATriangleEffect : public GrPLSGeometryProcessor {
+public:
+
+    static GrPLSGeometryProcessor* Create(const SkMatrix& localMatrix,
+                                          bool usesLocalCoords) {
+        return new PLSAATriangleEffect(localMatrix, usesLocalCoords);
+    }
+
+    virtual ~PLSAATriangleEffect() {}
+
+    const char* name() const override { return "PLSAATriangle"; }
+
+    const Attribute* inPosition() const { return fInPosition; }
+    const Attribute* inVertex1() const { return fInVertex1; }
+    const Attribute* inVertex2() const { return fInVertex2; }
+    const Attribute* inVertex3() const { return fInVertex3; }
+    const Attribute* inWindings() const { return fInWindings; }
+    const SkMatrix& localMatrix() const { return fLocalMatrix; }
+    bool usesLocalCoords() const { return fUsesLocalCoords; }
+
+    class GLSLProcessor : public GrGLSLGeometryProcessor {
+    public:
+        GLSLProcessor(const GrGeometryProcessor&) {}
+
+        void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override {
+            const PLSAATriangleEffect& te = args.fGP.cast<PLSAATriangleEffect>();
+            GrGLSLVertexBuilder* vsBuilder = args.fVertBuilder;
+            GrGLSLVaryingHandler* varyingHandler = args.fVaryingHandler;
+            GrGLSLUniformHandler* uniformHandler = args.fUniformHandler;
+
+            varyingHandler->emitAttributes(te);
+
+            this->setupPosition(vsBuilder, gpArgs, te.inPosition()->fName);
+
+            GrGLSLVertToFrag v1(kVec2f_GrSLType);
+            varyingHandler->addVarying("Vertex1", &v1, kHigh_GrSLPrecision);
+            vsBuilder->codeAppendf("%s = vec2(%s.x, %s.y);\n", 
+                                   v1.vsOut(),
+                                   te.inVertex1()->fName, 
+                                   te.inVertex1()->fName);
+
+            GrGLSLVertToFrag v2(kVec2f_GrSLType);
+            varyingHandler->addVarying("Vertex2", &v2, kHigh_GrSLPrecision);
+            vsBuilder->codeAppendf("%s = vec2(%s.x, %s.y);\n", 
+                                   v2.vsOut(),
+                                   te.inVertex2()->fName, 
+                                   te.inVertex2()->fName);
+
+            GrGLSLVertToFrag v3(kVec2f_GrSLType);
+            varyingHandler->addVarying("Vertex3", &v3, kHigh_GrSLPrecision);
+            vsBuilder->codeAppendf("%s = vec2(%s.x, %s.y);\n", 
+                                   v3.vsOut(),
+                                   te.inVertex3()->fName, 
+                                   te.inVertex3()->fName);
+
+            GrGLSLVertToFrag delta1(kVec2f_GrSLType);
+            varyingHandler->addVarying("delta1", &delta1, kHigh_GrSLPrecision);
+            vsBuilder->codeAppendf("%s = vec2(%s.x - %s.x, %s.y - %s.y) * 0.5;\n", 
+                                   delta1.vsOut(), v1.vsOut(), v2.vsOut(), v2.vsOut(), v1.vsOut());
+
+            GrGLSLVertToFrag delta2(kVec2f_GrSLType);
+            varyingHandler->addVarying("delta2", &delta2, kHigh_GrSLPrecision);
+            vsBuilder->codeAppendf("%s = vec2(%s.x - %s.x, %s.y - %s.y) * 0.5;\n", 
+                                   delta2.vsOut(), v2.vsOut(), v3.vsOut(), v3.vsOut(), v2.vsOut());
+
+            GrGLSLVertToFrag delta3(kVec2f_GrSLType);
+            varyingHandler->addVarying("delta3", &delta3, kHigh_GrSLPrecision);
+            vsBuilder->codeAppendf("%s = vec2(%s.x - %s.x, %s.y - %s.y) * 0.5;\n", 
+                                   delta3.vsOut(), v3.vsOut(), v1.vsOut(), v1.vsOut(), v3.vsOut());
+
+            GrGLSLVertToFrag windings(kInt_GrSLType);
+            varyingHandler->addVarying("windings", &windings, kLow_GrSLPrecision);
+            vsBuilder->codeAppendf("%s = %s;\n", 
+                                   windings.vsOut(), te.inWindings()->fName);
+
+            // emit transforms
+            this->emitTransforms(vsBuilder, varyingHandler, uniformHandler, gpArgs->fPositionVar, 
+                                 te.inPosition()->fName, te.localMatrix(), args.fTransformsIn, 
+                                 args.fTransformsOut);
+
+            GrGLSLFragmentBuilder* fsBuilder = args.fFragBuilder;
+            SkAssertResult(fsBuilder->enableFeature(
+                           GrGLSLFragmentShaderBuilder::kPixelLocalStorage_GLSLFeature));
+            SkAssertResult(fsBuilder->enableFeature(
+                    GrGLSLFragmentShaderBuilder::kStandardDerivatives_GLSLFeature));
+            fsBuilder->declAppendf(PLS_DATA_DECL);
+            // Compute four subsamples, each shifted a quarter pixel along x and y from 
+            // gl_FragCoord. The oriented box positioning of the subsamples is of course not 
+            // optimal, but it greatly simplifies the math and this simplification is necessary for
+            // performance reasons.
+            fsBuilder->codeAppendf("highp vec2 firstSample = %s.xy - vec2(0.25);\n", 
+                                   fsBuilder->fragmentPosition());
+            fsBuilder->codeAppendf("highp vec2 delta1 = %s;\n", delta1.fsIn());
+            fsBuilder->codeAppendf("highp vec2 delta2 = %s;\n", delta2.fsIn());
+            fsBuilder->codeAppendf("highp vec2 delta3 = %s;\n", delta3.fsIn());
+            // Check whether first sample is inside the triangle by computing three dot products. If
+            // all are < 0, we're inside. The first vector in each case is half of what it is
+            // "supposed" to be, because we re-use them later as adjustment factors for which half
+            // is the correct value, so we multiply the dots by two to compensate.
+            fsBuilder->codeAppendf("highp float d1 = dot(delta1, (firstSample - %s).yx) * 2.0;\n", 
+                                   v1.fsIn());
+            fsBuilder->codeAppendf("highp float d2 = dot(delta2, (firstSample - %s).yx) * 2.0;\n", 
+                                   v2.fsIn());
+            fsBuilder->codeAppendf("highp float d3 = dot(delta3, (firstSample - %s).yx) * 2.0;\n", 
+                                   v3.fsIn());
+            fsBuilder->codeAppend("highp float dmax = max(d1, max(d2, d3));");
+            fsBuilder->codeAppendf("pls.windings[0] += (dmax <= 0.0) ? %s : 0;\n", windings.fsIn());
+            // for subsequent samples, we don't recalculate the entire dot product -- just adjust it
+            // to the value it would have if we did recompute it.
+            fsBuilder->codeAppend("d1 += delta1.x;\n");
+            fsBuilder->codeAppend("d2 += delta2.x;\n");
+            fsBuilder->codeAppend("d3 += delta3.x;\n");
+            fsBuilder->codeAppend("dmax = max(d1, max(d2, d3));");
+            fsBuilder->codeAppendf("pls.windings[1] += (dmax <= 0.0) ? %s : 0;\n", windings.fsIn());
+            fsBuilder->codeAppend("d1 += delta1.y;\n");
+            fsBuilder->codeAppend("d2 += delta2.y;\n");
+            fsBuilder->codeAppend("d3 += delta3.y;\n");
+            fsBuilder->codeAppend("dmax = max(d1, max(d2, d3));");
+            fsBuilder->codeAppendf("pls.windings[2] += (dmax <= 0.0) ? %s : 0;\n", windings.fsIn());
+            fsBuilder->codeAppend("d1 -= delta1.x;\n");
+            fsBuilder->codeAppend("d2 -= delta2.x;\n");
+            fsBuilder->codeAppend("d3 -= delta3.x;\n");
+            fsBuilder->codeAppend("dmax = max(d1, max(d2, d3));");
+            fsBuilder->codeAppendf("pls.windings[3] += (dmax <= 0.0) ? %s : 0;\n", windings.fsIn());
+        }
+
+        static inline void GenKey(const GrGeometryProcessor& gp,
+                                  const GrGLSLCaps&,
+                                  GrProcessorKeyBuilder* b) {
+            const PLSAATriangleEffect& te = gp.cast<PLSAATriangleEffect>();
+            uint32_t key = 0;
+            key |= te.localMatrix().hasPerspective() ? 0x1 : 0x0;
+            b->add32(key);
+        }
+
+        virtual void setData(const GrGLSLProgramDataManager& pdman,
+                             const GrPrimitiveProcessor& gp) override {
+        }
+
+        void setTransformData(const GrPrimitiveProcessor& primProc,
+                              const GrGLSLProgramDataManager& pdman,
+                              int index,
+                              const SkTArray<const GrCoordTransform*, true>& transforms) override {
+            this->setTransformDataHelper<PLSAATriangleEffect>(primProc, pdman, index, transforms);
+        }
+
+    private:
+        typedef GrGLSLGeometryProcessor INHERITED;
+    };
+
+    virtual void getGLSLProcessorKey(const GrGLSLCaps& caps,
+                                   GrProcessorKeyBuilder* b) const override {
+        GLSLProcessor::GenKey(*this, caps, b);
+    }
+
+    virtual GrGLSLPrimitiveProcessor* createGLSLInstance(const GrGLSLCaps&) const override {
+        return new GLSLProcessor(*this);
+    }
+
+private:
+    PLSAATriangleEffect(const SkMatrix& localMatrix, bool usesLocalCoords)
+        : fLocalMatrix(localMatrix)
+        , fUsesLocalCoords(usesLocalCoords) {
+        this->initClassID<PLSAATriangleEffect>();
+        fInPosition = &this->addVertexAttrib(Attribute("inPosition", kVec2f_GrVertexAttribType, 
+                                                       kHigh_GrSLPrecision));
+        fInVertex1 = &this->addVertexAttrib(Attribute("inVertex1", kVec2f_GrVertexAttribType, 
+                                                      kHigh_GrSLPrecision));
+        fInVertex2 = &this->addVertexAttrib(Attribute("inVertex2", kVec2f_GrVertexAttribType, 
+                                                      kHigh_GrSLPrecision));
+        fInVertex3 = &this->addVertexAttrib(Attribute("inVertex3", kVec2f_GrVertexAttribType, 
+                                                      kHigh_GrSLPrecision));
+        fInWindings = &this->addVertexAttrib(Attribute("inWindings", kInt_GrVertexAttribType, 
+                                                       kLow_GrSLPrecision));
+        this->setWillReadFragmentPosition();
+    }
+
+    const Attribute* fInPosition;
+    const Attribute* fInVertex1;
+    const Attribute* fInVertex2;
+    const Attribute* fInVertex3;
+    const Attribute* fInWindings;
+    SkMatrix         fLocalMatrix;
+    bool             fUsesLocalCoords;
+    
+    GR_DECLARE_GEOMETRY_PROCESSOR_TEST;
+
+    typedef GrGeometryProcessor INHERITED;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+/*
+ * Quadratic specified by 0=u^2-v canonical coords. u and v are the first
+ * two components of the vertex attribute. Coverage is based on signed
+ * distance with negative being inside, positive outside. The edge is specified in
+ * window space (y-down). If either the third or fourth component of the interpolated
+ * vertex coord is > 0 then the pixel is considered outside the edge. This is used to
+ * attempt to trim to a portion of the infinite quad.
+ * Requires shader derivative instruction support.
+ */
+
+class PLSQuadEdgeEffect : public GrPLSGeometryProcessor {
+public:
+
+    static GrPLSGeometryProcessor* Create(const SkMatrix& localMatrix,
+                                          bool usesLocalCoords) {
+        return new PLSQuadEdgeEffect(localMatrix, usesLocalCoords);
+    }
+
+    virtual ~PLSQuadEdgeEffect() {}
+
+    const char* name() const override { return "PLSQuadEdge"; }
+
+    const Attribute* inPosition() const { return fInPosition; }
+    const Attribute* inUV() const { return fInUV; }
+    const Attribute* inEndpoint1() const { return fInEndpoint1; }
+    const Attribute* inEndpoint2() const { return fInEndpoint2; }
+    const Attribute* inWindings() const { return fInWindings; }
+    const SkMatrix& localMatrix() const { return fLocalMatrix; }
+    bool usesLocalCoords() const { return fUsesLocalCoords; }
+
+    class GLSLProcessor : public GrGLSLGeometryProcessor {
+    public:
+        GLSLProcessor(const GrGeometryProcessor&) {}
+
+        void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override {
+            const PLSQuadEdgeEffect& qe = args.fGP.cast<PLSQuadEdgeEffect>();
+            GrGLSLVertexBuilder* vsBuilder = args.fVertBuilder;
+            GrGLSLVaryingHandler* varyingHandler = args.fVaryingHandler;
+            GrGLSLUniformHandler* uniformHandler = args.fUniformHandler;
+
+            // emit attributes
+            varyingHandler->emitAttributes(qe);
+
+            GrGLSLVertToFrag uv(kVec2f_GrSLType);
+            varyingHandler->addVarying("uv", &uv, kHigh_GrSLPrecision);
+            vsBuilder->codeAppendf("%s = %s;", uv.vsOut(), qe.inUV()->fName);
+
+            GrGLSLVertToFrag ep1(kVec2f_GrSLType);
+            varyingHandler->addVarying("endpoint1", &ep1, kHigh_GrSLPrecision);
+            vsBuilder->codeAppendf("%s = vec2(%s.x, %s.y);", ep1.vsOut(), 
+                                  qe.inEndpoint1()->fName, qe.inEndpoint1()->fName);
+
+            GrGLSLVertToFrag ep2(kVec2f_GrSLType);
+            varyingHandler->addVarying("endpoint2", &ep2, kHigh_GrSLPrecision);
+            vsBuilder->codeAppendf("%s = vec2(%s.x, %s.y);", ep2.vsOut(), 
+                                  qe.inEndpoint2()->fName, qe.inEndpoint2()->fName);
+
+            GrGLSLVertToFrag delta(kVec2f_GrSLType);
+            varyingHandler->addVarying("delta", &delta, kHigh_GrSLPrecision);
+            vsBuilder->codeAppendf("%s = vec2(%s.x - %s.x, %s.y - %s.y) * 0.5;\n", 
+                                   delta.vsOut(), ep1.vsOut(), ep2.vsOut(), ep2.vsOut(), 
+                                   ep1.vsOut());
+
+            GrGLSLVertToFrag windings(kInt_GrSLType);
+            varyingHandler->addVarying("windings", &windings, kLow_GrSLPrecision);
+            vsBuilder->codeAppendf("%s = %s;\n", 
+                                   windings.vsOut(), qe.inWindings()->fName);
+
+            // Setup position
+            this->setupPosition(vsBuilder, gpArgs, qe.inPosition()->fName);
+
+            // emit transforms
+            this->emitTransforms(vsBuilder, varyingHandler, uniformHandler, gpArgs->fPositionVar, 
+                                 qe.inPosition()->fName, qe.localMatrix(), args.fTransformsIn, 
+                                 args.fTransformsOut);
+
+            GrGLSLFragmentBuilder* fsBuilder = args.fFragBuilder;
+            SkAssertResult(fsBuilder->enableFeature(
+                           GrGLSLFragmentShaderBuilder::kPixelLocalStorage_GLSLFeature));
+            SkAssertResult(fsBuilder->enableFeature(
+                    GrGLSLFragmentShaderBuilder::kStandardDerivatives_GLSLFeature));
+            static const int QUAD_ARGS = 2;
+            GrGLSLShaderVar inQuadArgs[QUAD_ARGS] = {
+                GrGLSLShaderVar("dot", kFloat_GrSLType, 0, kHigh_GrSLPrecision),
+                GrGLSLShaderVar("uv", kVec2f_GrSLType, 0, kHigh_GrSLPrecision)
+            };
+            SkString inQuadName;
+
+            const char* inQuadCode = "if (uv.x * uv.x <= uv.y) {\n"
+                                     "return dot >= 0.0;\n"
+                                     "} else {\n"
+                                     "return false;\n"
+                                     "}";
+            fsBuilder->emitFunction(kBool_GrSLType, "in_quad", QUAD_ARGS, inQuadArgs, inQuadCode, 
+                                    &inQuadName);
+            fsBuilder->declAppendf(PLS_DATA_DECL);
+            // keep the derivative instructions outside the conditional
+            fsBuilder->codeAppendf("highp vec2 uvdX = dFdx(%s);\n", uv.fsIn());
+            fsBuilder->codeAppendf("highp vec2 uvdY = dFdy(%s);\n", uv.fsIn());
+            fsBuilder->codeAppend("highp vec2 uvIncX = uvdX * 0.45 + uvdY * -0.1;\n");
+            fsBuilder->codeAppend("highp vec2 uvIncY = uvdX * 0.1 + uvdY * 0.55;\n");
+            fsBuilder->codeAppendf("highp vec2 uv = %s.xy - uvdX * 0.35 - uvdY * 0.25;\n", 
+                                   uv.fsIn());
+            fsBuilder->codeAppendf("highp vec2 firstSample = %s.xy - vec2(0.25);\n",
+                                   fsBuilder->fragmentPosition());
+            fsBuilder->codeAppendf("highp float d = dot(%s, (firstSample - %s).yx) * 2.0;\n", 
+                                   delta.fsIn(), ep1.fsIn());
+            fsBuilder->codeAppendf("pls.windings[0] += %s(d, uv) ? %s : 0;\n", inQuadName.c_str(), 
+                                   windings.fsIn());
+            fsBuilder->codeAppend("uv += uvIncX;\n");
+            fsBuilder->codeAppendf("d += %s.x;\n", delta.fsIn());
+            fsBuilder->codeAppendf("pls.windings[1] += %s(d, uv) ? %s : 0;\n", inQuadName.c_str(), 
+                                   windings.fsIn());
+            fsBuilder->codeAppend("uv += uvIncY;\n");
+            fsBuilder->codeAppendf("d += %s.y;\n", delta.fsIn());
+            fsBuilder->codeAppendf("pls.windings[2] += %s(d, uv) ? %s : 0;\n", inQuadName.c_str(), 
+                                   windings.fsIn());
+            fsBuilder->codeAppend("uv -= uvIncX;\n");
+            fsBuilder->codeAppendf("d -= %s.x;\n", delta.fsIn());
+            fsBuilder->codeAppendf("pls.windings[3] += %s(d, uv) ? %s : 0;\n", inQuadName.c_str(), 
+                                   windings.fsIn());
+        }
+
+        static inline void GenKey(const GrGeometryProcessor& gp,
+                                  const GrGLSLCaps&,
+                                  GrProcessorKeyBuilder* b) {
+            const PLSQuadEdgeEffect& qee = gp.cast<PLSQuadEdgeEffect>();
+            uint32_t key = 0;
+            key |= qee.usesLocalCoords() && qee.localMatrix().hasPerspective() ? 0x1 : 0x0;
+            b->add32(key);
+        }
+
+        virtual void setData(const GrGLSLProgramDataManager& pdman,
+                             const GrPrimitiveProcessor& gp) override {
+        }
+
+        void setTransformData(const GrPrimitiveProcessor& primProc,
+                              const GrGLSLProgramDataManager& pdman,
+                              int index,
+                              const SkTArray<const GrCoordTransform*, true>& transforms) override {
+            this->setTransformDataHelper<PLSQuadEdgeEffect>(primProc, pdman, index, transforms);
+        }
+
+    private:
+        typedef GrGLSLGeometryProcessor INHERITED;
+    };
+
+    virtual void getGLSLProcessorKey(const GrGLSLCaps& caps,
+                                   GrProcessorKeyBuilder* b) const override {
+        GLSLProcessor::GenKey(*this, caps, b);
+    }
+
+    virtual GrGLSLPrimitiveProcessor* createGLSLInstance(const GrGLSLCaps&) const override {
+        return new GLSLProcessor(*this);
+    }
+
+private:
+    PLSQuadEdgeEffect(const SkMatrix& localMatrix, bool usesLocalCoords)
+        : fLocalMatrix(localMatrix)
+        , fUsesLocalCoords(usesLocalCoords) {
+        this->initClassID<PLSQuadEdgeEffect>();
+        fInPosition = &this->addVertexAttrib(Attribute("inPosition", kVec2f_GrVertexAttribType, 
+                                                       kHigh_GrSLPrecision));
+        fInUV = &this->addVertexAttrib(Attribute("inUV", kVec2f_GrVertexAttribType, 
+                                                 kHigh_GrSLPrecision));
+        fInEndpoint1 = &this->addVertexAttrib(Attribute("inEndpoint1", kVec2f_GrVertexAttribType, 
+                                                        kHigh_GrSLPrecision));
+        fInEndpoint2 = &this->addVertexAttrib(Attribute("inEndpoint2", kVec2f_GrVertexAttribType, 
+                                                        kHigh_GrSLPrecision));
+        fInWindings  = &this->addVertexAttrib(Attribute("inWindings", kInt_GrVertexAttribType, 
+                                                        kLow_GrSLPrecision));
+        this->setWillReadFragmentPosition();
+    }
+
+    const Attribute* fInPosition;
+    const Attribute* fInUV;
+    const Attribute* fInEndpoint1;
+    const Attribute* fInEndpoint2;
+    const Attribute* fInWindings;
+    SkMatrix         fLocalMatrix;
+    bool             fUsesLocalCoords;
+    
+    GR_DECLARE_GEOMETRY_PROCESSOR_TEST;
+
+    typedef GrGeometryProcessor INHERITED;
+};
+
+class PLSFinishEffect : public GrGeometryProcessor {
+public:
+
+    static GrGeometryProcessor* Create(GrColor color, bool useEvenOdd, const SkMatrix& localMatrix,
+                                       bool usesLocalCoords) {
+        return new PLSFinishEffect(color, useEvenOdd, localMatrix, usesLocalCoords);
+    }
+
+    virtual ~PLSFinishEffect() {}
+
+    const char* name() const override { return "PLSFinish"; }
+
+    const Attribute* inPosition() const { return fInPosition; }
+    GrColor color() const { return fColor; }
+    bool colorIgnored() const { return GrColor_ILLEGAL == fColor; }
+    const SkMatrix& localMatrix() const { return fLocalMatrix; }
+    bool usesLocalCoords() const { return fUsesLocalCoords; }
+    
+    GrPixelLocalStorageState getPixelLocalStorageState() const override { 
+        return GrPixelLocalStorageState::kFinish_State;
+    }
+
+    class GLSLProcessor : public GrGLSLGeometryProcessor {
+    public:
+        GLSLProcessor(const GrGeometryProcessor&) {}
+
+        void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override {
+            const PLSFinishEffect& fe = args.fGP.cast<PLSFinishEffect>();
+            GrGLSLVertexBuilder* vsBuilder = args.fVertBuilder;
+            GrGLSLVaryingHandler* varyingHandler = args.fVaryingHandler;
+            GrGLSLUniformHandler* uniformHandler = args.fUniformHandler;
+
+            fUseEvenOdd = uniformHandler->addUniform(GrGLUniformHandler::kFragment_Visibility,
+                                                    kFloat_GrSLType, kLow_GrSLPrecision, 
+                                                    "useEvenOdd");
+            const char* useEvenOdd = uniformHandler->getUniformCStr(fUseEvenOdd);
+
+            varyingHandler->emitAttributes(fe);
+            this->setupPosition(vsBuilder, gpArgs, fe.inPosition()->fName);
+            this->emitTransforms(vsBuilder, varyingHandler, uniformHandler, gpArgs->fPositionVar, 
+                                 fe.inPosition()->fName, fe.localMatrix(), args.fTransformsIn, 
+                                 args.fTransformsOut);
+
+            GrGLSLFragmentBuilder* fsBuilder = args.fFragBuilder;
+            SkAssertResult(fsBuilder->enableFeature(
+                           GrGLSLFragmentShaderBuilder::kPixelLocalStorage_GLSLFeature));
+            fsBuilder->declAppendf(PLS_DATA_DECL);
+            fsBuilder->codeAppend("float coverage;");
+            fsBuilder->codeAppendf("if (%s != 0.0) {\n", useEvenOdd);
+            fsBuilder->codeAppend("coverage = float(abs(pls.windings[0]) % 2) * 0.25;\n");
+            fsBuilder->codeAppend("coverage += float(abs(pls.windings[1]) % 2) * 0.25;\n");
+            fsBuilder->codeAppend("coverage += float(abs(pls.windings[2]) % 2) * 0.25;\n");
+            fsBuilder->codeAppend("coverage += float(abs(pls.windings[3]) % 2) * 0.25;\n");
+            fsBuilder->codeAppend("} else {\n");
+            fsBuilder->codeAppend("coverage = pls.windings[0] != 0 ? 0.25 : 0.0;\n");
+            fsBuilder->codeAppend("coverage += pls.windings[1] != 0 ? 0.25 : 0.0;\n");
+            fsBuilder->codeAppend("coverage += pls.windings[2] != 0 ? 0.25 : 0.0;\n");
+            fsBuilder->codeAppend("coverage += pls.windings[3] != 0 ? 0.25 : 0.0;\n");
+            fsBuilder->codeAppend("}");
+            if (!fe.colorIgnored()) {
+                this->setupUniformColor(fsBuilder, uniformHandler, args.fOutputColor, 
+                                        &fColorUniform);
+            }
+            fsBuilder->codeAppendf("%s = vec4(coverage);", args.fOutputCoverage);
+        }
+
+        static inline void GenKey(const GrGeometryProcessor& gp,
+                                  const GrGLSLCaps&,
+                                  GrProcessorKeyBuilder* b) {
+            const PLSFinishEffect& fe = gp.cast<PLSFinishEffect>();
+            uint32_t key = 0;
+            key |= fe.usesLocalCoords() && fe.localMatrix().hasPerspective() ? 0x1 : 0x0;
+            b->add32(key);
+        }
+
+        virtual void setData(const GrGLSLProgramDataManager& pdman,
+                             const GrPrimitiveProcessor& gp) override {
+            const PLSFinishEffect& fe = gp.cast<PLSFinishEffect>();
+            pdman.set1f(fUseEvenOdd, fe.fUseEvenOdd);
+            if (fe.color() != fColor && !fe.colorIgnored()) {
+                GrGLfloat c[4];
+                GrColorToRGBAFloat(fe.color(), c);
+                pdman.set4fv(fColorUniform, 1, c);
+                fColor = fe.color();
+            }
+        }
+
+        void setTransformData(const GrPrimitiveProcessor& primProc,
+                              const GrGLSLProgramDataManager& pdman,
+                              int index,
+                              const SkTArray<const GrCoordTransform*, true>& transforms) override {
+            this->setTransformDataHelper<PLSFinishEffect>(primProc, pdman, index, transforms);
+        }
+
+    private:
+        GrColor fColor;
+        UniformHandle fColorUniform;
+        UniformHandle fUseEvenOdd;
+
+        typedef GrGLSLGeometryProcessor INHERITED;
+    };
+
+    virtual void getGLSLProcessorKey(const GrGLSLCaps& caps,
+                                   GrProcessorKeyBuilder* b) const override {
+        GLSLProcessor::GenKey(*this, caps, b);
+    }
+
+    virtual GrGLSLPrimitiveProcessor* createGLSLInstance(const GrGLSLCaps&) const override {
+        return new GLSLProcessor(*this);
+    }
+
+private:
+    PLSFinishEffect(GrColor color, bool useEvenOdd, const SkMatrix& localMatrix, 
+                    bool usesLocalCoords)
+        : fColor(color)
+        , fUseEvenOdd(useEvenOdd)
+        , fLocalMatrix(localMatrix)
+        , fUsesLocalCoords(usesLocalCoords) {
+        this->initClassID<PLSFinishEffect>();
+        fInPosition = &this->addVertexAttrib(Attribute("inPosition", kVec2f_GrVertexAttribType, 
+                                                       kHigh_GrSLPrecision));
+    }
+
+    const Attribute* fInPosition;
+    GrColor          fColor;
+    bool             fUseEvenOdd;
+    SkMatrix         fLocalMatrix;
+    bool             fUsesLocalCoords;
+
+    typedef GrGeometryProcessor INHERITED;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+bool GrPLSPathRenderer::onCanDrawPath(const CanDrawPathArgs& args) const {
+    // We have support for even-odd rendering, but are having some troublesome
+    // seams. Disable in the presence of even-odd for now.
+    return args.fShaderCaps->shaderDerivativeSupport() && args.fAntiAlias &&
+            args.fStroke->isFillStyle() && !args.fPath->isInverseFillType() &&
+            args.fPath->getFillType() == SkPath::FillType::kWinding_FillType;
+}
+
+class PLSPathBatch : public GrVertexBatch {
+public:
+    DEFINE_BATCH_CLASS_ID
+    struct Geometry {
+        GrColor fColor;
+        SkMatrix fViewMatrix;
+        SkPath fPath;
+    };
+
+    static GrDrawBatch* Create(const Geometry& geometry) {
+        return new PLSPathBatch(geometry);
+    }
+
+    const char* name() const override { return "PLSBatch"; }
+
+    void computePipelineOptimizations(GrInitInvariantOutput* color, 
+                                      GrInitInvariantOutput* coverage,
+                                      GrBatchToXPOverrides* overrides) const override {
+        // When this is called on a batch, there is only one geometry bundle
+        color->setKnownFourComponents(fGeoData[0].fColor);
+        coverage->setUnknownSingleComponent();
+        overrides->fUsePLSDstRead = true;
+    }
+
+    void initBatchTracker(const GrXPOverridesForBatch& overrides) override {
+        // Handle any color overrides
+        if (!overrides.readsColor()) {
+            fGeoData[0].fColor = GrColor_ILLEGAL;
+        }
+        overrides.getOverrideColorIfSet(&fGeoData[0].fColor);
+
+        // setup batch properties
+        fBatch.fColorIgnored = !overrides.readsColor();
+        fBatch.fColor = fGeoData[0].fColor;
+        fBatch.fUsesLocalCoords = overrides.readsLocalCoords();
+        fBatch.fCoverageIgnored = !overrides.readsCoverage();
+        fBatch.fCanTweakAlphaForCoverage = overrides.canTweakAlphaForCoverage();
+    }
+
+    void onPrepareDraws(Target* target) const override {
+        int instanceCount = fGeoData.count();
+
+        SkMatrix invert;
+        if (this->usesLocalCoords() && !this->viewMatrix().invert(&invert)) {
+            SkDebugf("Could not invert viewmatrix\n");
+            return;
+        }
+
+        // Setup GrGeometryProcessors
+        SkAutoTUnref<GrPLSGeometryProcessor> triangleProcessor(
+                PLSAATriangleEffect::Create(invert, this->usesLocalCoords()));
+        SkAutoTUnref<GrPLSGeometryProcessor> quadProcessor(
+                PLSQuadEdgeEffect::Create(invert, this->usesLocalCoords()));
+
+        GrResourceProvider* rp = target->resourceProvider();
+        for (int i = 0; i < instanceCount; ++i) {
+            const Geometry& args = fGeoData[i];
+            SkRect bounds = args.fPath.getBounds();
+            args.fViewMatrix.mapRect(&bounds);
+            bounds.fLeft = SkScalarFloorToScalar(bounds.fLeft);
+            bounds.fTop = SkScalarFloorToScalar(bounds.fTop);
+            bounds.fRight = SkScalarCeilToScalar(bounds.fRight);
+            bounds.fBottom = SkScalarCeilToScalar(bounds.fBottom);
+            triangleProcessor->fBounds = bounds;
+            quadProcessor->fBounds = bounds;
+
+            // We use the fact that SkPath::transform path does subdivision based on
+            // perspective. Otherwise, we apply the view matrix when copying to the
+            // segment representation.
+            const SkMatrix* viewMatrix = &args.fViewMatrix;
+
+            // We avoid initializing the path unless we have to
+            const SkPath* pathPtr = &args.fPath;
+            SkTLazy<SkPath> tmpPath;
+            if (viewMatrix->hasPerspective()) {
+                SkPath* tmpPathPtr = tmpPath.init(*pathPtr);
+                tmpPathPtr->setIsVolatile(true);
+                tmpPathPtr->transform(*viewMatrix);
+                viewMatrix = &SkMatrix::I();
+                pathPtr = tmpPathPtr;
+            }
+
+            GrVertices grVertices;
+
+            PLSVertices triVertices;
+            PLSVertices quadVertices;
+            if (!get_geometry(*pathPtr, *viewMatrix, triVertices, quadVertices, rp, bounds)) {
+                continue;
+            }
+
+            if (triVertices.count()) {
+                const GrVertexBuffer* triVertexBuffer;
+                int firstTriVertex;
+                size_t triStride = triangleProcessor->getVertexStride();
+                PLSVertex* triVerts = reinterpret_cast<PLSVertex*>(target->makeVertexSpace(
+                        triStride, triVertices.count(), &triVertexBuffer, &firstTriVertex));
+                if (!triVerts) {
+                    SkDebugf("Could not allocate vertices\n");
+                    return;
+                }
+                for (int i = 0; i < triVertices.count(); ++i) {
+                    triVerts[i] = triVertices[i];
+                }
+                grVertices.init(kTriangles_GrPrimitiveType, triVertexBuffer, firstTriVertex, 
+                                triVertices.count());
+                target->initDraw(triangleProcessor, this->pipeline());
+                target->draw(grVertices);
+            }
+
+            if (quadVertices.count()) {
+                const GrVertexBuffer* quadVertexBuffer;
+                int firstQuadVertex;
+                size_t quadStride = quadProcessor->getVertexStride();
+                PLSVertex* quadVerts = reinterpret_cast<PLSVertex*>(target->makeVertexSpace(
+                        quadStride, quadVertices.count(), &quadVertexBuffer, &firstQuadVertex));
+                if (!quadVerts) {
+                    SkDebugf("Could not allocate vertices\n");
+                    return;
+                }
+                for (int i = 0; i < quadVertices.count(); ++i) {
+                    quadVerts[i] = quadVertices[i];
+                }
+                grVertices.init(kTriangles_GrPrimitiveType, quadVertexBuffer, firstQuadVertex, 
+                                quadVertices.count());
+                target->initDraw(quadProcessor, this->pipeline());
+                target->draw(grVertices);
+            }
+
+            SkAutoTUnref<GrGeometryProcessor> finishProcessor(
+                    PLSFinishEffect::Create(this->color(), 
+                                            pathPtr->getFillType() == 
+                                                                SkPath::FillType::kEvenOdd_FillType,
+                                            invert, 
+                                            this->usesLocalCoords()));
+            const GrVertexBuffer* rectVertexBuffer;
+            size_t finishStride = finishProcessor->getVertexStride();
+            int firstRectVertex;
+            static const int kRectVertexCount = 6;
+            SkPoint* rectVerts = reinterpret_cast<SkPoint*>(target->makeVertexSpace(
+                    finishStride, kRectVertexCount, &rectVertexBuffer, &firstRectVertex));
+            if (!rectVerts) {
+                SkDebugf("Could not allocate vertices\n");
+                return;
+            }
+            rectVerts[0] = { bounds.fLeft, bounds.fTop };
+            rectVerts[1] = { bounds.fLeft, bounds.fBottom };
+            rectVerts[2] = { bounds.fRight, bounds.fBottom };
+            rectVerts[3] = { bounds.fLeft, bounds.fTop };
+            rectVerts[4] = { bounds.fRight, bounds.fTop };
+            rectVerts[5] = { bounds.fRight, bounds.fBottom };
+
+            grVertices.init(kTriangles_GrPrimitiveType, rectVertexBuffer, firstRectVertex, 
+                            kRectVertexCount);
+            target->initDraw(finishProcessor, this->pipeline());
+            target->draw(grVertices);
+        }
+    }
+
+    SkSTArray<1, Geometry, true>* geoData() { return &fGeoData; }
+
+private:
+    PLSPathBatch(const Geometry& geometry) : INHERITED(ClassID()) {
+        fGeoData.push_back(geometry);
+
+        // compute bounds
+        fBounds = geometry.fPath.getBounds();
+        geometry.fViewMatrix.mapRect(&fBounds);
+    }
+
+    bool onCombineIfPossible(GrBatch* t, const GrCaps& caps) override {
+        return false;
+    }
+
+    GrColor color() const { return fBatch.fColor; }
+    bool usesLocalCoords() const { return fBatch.fUsesLocalCoords; }
+    bool canTweakAlphaForCoverage() const { return fBatch.fCanTweakAlphaForCoverage; }
+    const SkMatrix& viewMatrix() const { return fGeoData[0].fViewMatrix; }
+    bool coverageIgnored() const { return fBatch.fCoverageIgnored; }
+
+    struct BatchTracker {
+        GrColor fColor;
+        bool fUsesLocalCoords;
+        bool fColorIgnored;
+        bool fCoverageIgnored;
+        bool fCanTweakAlphaForCoverage;
+    };
+
+    BatchTracker fBatch;
+    SkSTArray<1, Geometry, true> fGeoData;
+
+    typedef GrVertexBatch INHERITED;
+};
+
+SkDEBUGCODE(bool inPLSDraw = false;)
+bool GrPLSPathRenderer::onDrawPath(const DrawPathArgs& args) {
+    if (args.fPath->isEmpty()) {
+        return true;
+    }
+    SkASSERT(!inPLSDraw);
+    SkDEBUGCODE(inPLSDraw = true;)
+    PLSPathBatch::Geometry geometry;
+    geometry.fColor = args.fColor;
+    geometry.fViewMatrix = *args.fViewMatrix;
+    geometry.fPath = *args.fPath;
+
+    SkAutoTUnref<GrDrawBatch> batch(PLSPathBatch::Create(geometry));
+    args.fTarget->drawBatch(*args.fPipelineBuilder, batch);
+
+    SkDEBUGCODE(inPLSDraw = false;)
+    return true;
+
+}
+
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+#ifdef GR_TEST_UTILS
+
+DRAW_BATCH_TEST_DEFINE(PLSPathBatch) {
+    PLSPathBatch::Geometry geometry;
+    geometry.fColor = GrRandomColor(random);
+    geometry.fViewMatrix = GrTest::TestMatrixInvertible(random);
+    geometry.fPath = GrTest::TestPathConvex(random);
+
+    return PLSPathBatch::Create(geometry);
+}
+
+#endif