src/gpu/ops/GrLatticeOp.cpp - skia.git - Git at Google


            
            /*

            
             * 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 "GrLatticeOp.h"

            
            #include "GrDefaultGeoProcFactory.h"

            
            #include "GrDrawOpTest.h"

            
            #include "GrMeshDrawOp.h"

            
            #include "GrOpFlushState.h"

            
            #include "GrResourceProvider.h"

            
            #include "GrSimpleMeshDrawOpHelper.h"

            
            #include "SkBitmap.h"

            
            #include "SkLatticeIter.h"

            
            #include "SkMatrixPriv.h"

            
            #include "SkPointPriv.h"

            
            #include "SkRect.h"

            
            #include "glsl/GrGLSLColorSpaceXformHelper.h"

            
            #include "glsl/GrGLSLGeometryProcessor.h"

            
            #include "glsl/GrGLSLVarying.h"


            namespace {


            class LatticeGP : public GrGeometryProcessor {

            
            public:

            
                struct Vertex {

            
                    SkPoint fPosition;

            
                    SkPoint fTextureCoords;

            
                    SkRect fTextureDomain;

            
                    GrColor fColor;

            
                };


                static sk_sp<GrGeometryProcessor> Make(const GrTextureProxy* proxy,

            
                                                       sk_sp<GrColorSpaceXform> csxf,

            
                                                       GrSamplerState::Filter filter) {

            
                    return sk_sp<GrGeometryProcessor>(new LatticeGP(proxy, std::move(csxf), filter));

            
                }


                const char* name() const override { return "LatticeGP"; }


                void getGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder* b) const override {

            
                    b->add32(GrColorSpaceXform::XformKey(fColorSpaceXform.get()));

            
                }


                GrGLSLPrimitiveProcessor* createGLSLInstance(const GrShaderCaps& caps) const override {

            
                    class GLSLProcessor : public GrGLSLGeometryProcessor {

            
                    public:

            
                        void setData(const GrGLSLProgramDataManager& pdman, const GrPrimitiveProcessor& proc,

            
                                     FPCoordTransformIter&& transformIter) override {

            
                            const auto& latticeGP = proc.cast<LatticeGP>();

            
                            this->setTransformDataHelper(SkMatrix::I(), pdman, &transformIter);

            
                            fColorSpaceXformHelper.setData(pdman, latticeGP.fColorSpaceXform.get());

            
                        }


                    private:

            
                        void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override {

            
                            using Interpolation = GrGLSLVaryingHandler::Interpolation;

            
                            const auto& latticeGP = args.fGP.cast<LatticeGP>();

            
                            fColorSpaceXformHelper.emitCode(args.fUniformHandler,

            
                                                            latticeGP.fColorSpaceXform.get());


                            args.fVaryingHandler->emitAttributes(latticeGP);

            
                            this->writeOutputPosition(args.fVertBuilder, gpArgs, latticeGP.kPositions.name());

            
                            this->emitTransforms(args.fVertBuilder,

            
                                                 args.fVaryingHandler,

            
                                                 args.fUniformHandler,

            
                                                 latticeGP.kTextureCoords.asShaderVar(),

            
                                                 args.fFPCoordTransformHandler);

            
                            args.fFragBuilder->codeAppend("float2 textureCoords;");

            
                            args.fVaryingHandler->addPassThroughAttribute(latticeGP.kTextureCoords,

            
                                                                          "textureCoords");

            
                            args.fFragBuilder->codeAppend("float4 textureDomain;");

            
                            args.fVaryingHandler->addPassThroughAttribute(

            
                                    latticeGP.kTextureDomain, "textureDomain", Interpolation::kCanBeFlat);

            
                            args.fVaryingHandler->addPassThroughAttribute(latticeGP.kColors, args.fOutputColor,

            
                                                                          Interpolation::kCanBeFlat);

            
                            args.fFragBuilder->codeAppendf("%s = ", args.fOutputColor);

            
                            args.fFragBuilder->appendTextureLookupAndModulate(

            
                                    args.fOutputColor,

            
                                    args.fTexSamplers[0],

            
                                    "clamp(textureCoords, textureDomain.xy, textureDomain.zw)",

            
                                    kFloat2_GrSLType,

            
                                    &fColorSpaceXformHelper);

            
                            args.fFragBuilder->codeAppend(";");

            
                            args.fFragBuilder->codeAppendf("%s = half4(1);", args.fOutputCoverage);

            
                        }

            
                        GrGLSLColorSpaceXformHelper fColorSpaceXformHelper;

            
                    };

            
                    return new GLSLProcessor;

            
                }


            private:

            
                LatticeGP(const GrTextureProxy* proxy, sk_sp<GrColorSpaceXform> csxf,

            
                          GrSamplerState::Filter filter)

            
                        : INHERITED(kLatticeGP_ClassID), fColorSpaceXform(std::move(csxf)) {

            
                    fSampler.reset(proxy->textureType(), proxy->config(), filter);

            
                    this->setTextureSamplerCnt(1);

            
                    this->setVertexAttributeCnt(4);

            
                }


                const Attribute& onVertexAttribute(int i) const override {

            
                    return IthAttribute(i, kPositions, kTextureCoords, kTextureDomain, kColors);

            
                }


                const TextureSampler& onTextureSampler(int) const override { return fSampler; }


                static constexpr Attribute kPositions = {"position", kFloat2_GrVertexAttribType};

            
                static constexpr Attribute kTextureCoords = {"textureCoords", kFloat2_GrVertexAttribType};

            
                static constexpr Attribute kTextureDomain = {"textureDomain", kFloat4_GrVertexAttribType};

            
                static constexpr Attribute kColors = {"color", kUByte4_norm_GrVertexAttribType};


                sk_sp<GrColorSpaceXform> fColorSpaceXform;

            
                TextureSampler fSampler;


                typedef GrGeometryProcessor INHERITED;

            
            };


            constexpr GrPrimitiveProcessor::Attribute LatticeGP::kPositions;

            
            constexpr GrPrimitiveProcessor::Attribute LatticeGP::kTextureCoords;

            
            constexpr GrPrimitiveProcessor::Attribute LatticeGP::kTextureDomain;

            
            constexpr GrPrimitiveProcessor::Attribute LatticeGP::kColors;


            class NonAALatticeOp final : public GrMeshDrawOp {

            
            private:

            
                using Helper = GrSimpleMeshDrawOpHelper;


            public:

            
                DEFINE_OP_CLASS_ID


                static const int kVertsPerRect = 4;

            
                static const int kIndicesPerRect = 6;


                static std::unique_ptr<GrDrawOp> Make(GrContext* context,

            
                                                      GrPaint&& paint,

            
                                                      const SkMatrix& viewMatrix,

            
                                                      sk_sp<GrTextureProxy> proxy,

            
                                                      sk_sp<GrColorSpaceXform> colorSpaceXForm,

            
                                                      GrSamplerState::Filter filter,

            
                                                      std::unique_ptr<SkLatticeIter> iter,

            
                                                      const SkRect& dst) {

            
                    SkASSERT(proxy);

            
                    return Helper::FactoryHelper<NonAALatticeOp>(context, std::move(paint), viewMatrix,

            
                                                                 std::move(proxy),

            
                                                                 std::move(colorSpaceXForm), filter,

            
                                                                 std::move(iter), dst);

            
                }


                NonAALatticeOp(Helper::MakeArgs& helperArgs, GrColor color, const SkMatrix& viewMatrix,

            
                               sk_sp<GrTextureProxy> proxy, sk_sp<GrColorSpaceXform> colorSpaceXform,

            
                               GrSamplerState::Filter filter, std::unique_ptr<SkLatticeIter> iter,

            
                               const SkRect& dst)

            
                        : INHERITED(ClassID())

            
                        , fHelper(helperArgs, GrAAType::kNone)

            
                        , fProxy(std::move(proxy))

            
                        , fColorSpaceXform(std::move(colorSpaceXform))

            
                        , fFilter(filter) {

            
                    Patch& patch = fPatches.push_back();

            
                    patch.fViewMatrix = viewMatrix;

            
                    patch.fColor = color;

            
                    patch.fIter = std::move(iter);

            
                    patch.fDst = dst;


                    // setup bounds

            
                    this->setTransformedBounds(patch.fDst, viewMatrix, HasAABloat::kNo, IsZeroArea::kNo);

            
                }


                const char* name() const override { return "NonAALatticeOp"; }


                void visitProxies(const VisitProxyFunc& func) const override {

            
                    func(fProxy.get());

            
                    fHelper.visitProxies(func);

            
                }


                SkString dumpInfo() const override {

            
                    SkString str;


                    for (int i = 0; i < fPatches.count(); ++i) {

            
                        str.appendf("%d: Color: 0x%08x Dst [L: %.2f, T: %.2f, R: %.2f, B: %.2f]\n", i,

            
                                    fPatches[i].fColor, fPatches[i].fDst.fLeft, fPatches[i].fDst.fTop,

            
                                    fPatches[i].fDst.fRight, fPatches[i].fDst.fBottom);

            
                    }


                    str += fHelper.dumpInfo();

            
                    str += INHERITED::dumpInfo();

            
                    return str;

            
                }


                FixedFunctionFlags fixedFunctionFlags() const override { return fHelper.fixedFunctionFlags(); }


                RequiresDstTexture finalize(const GrCaps& caps, const GrAppliedClip* clip) override {

            
                    auto opaque = GrColorIsOpaque(fPatches[0].fColor) && GrPixelConfigIsOpaque(fProxy->config())

            
                                          ? GrProcessorAnalysisColor::Opaque::kYes

            
                                          : GrProcessorAnalysisColor::Opaque::kNo;

            
                    auto analysisColor = GrProcessorAnalysisColor(opaque);

            
                    auto result = fHelper.xpRequiresDstTexture(

            
                            caps, clip, GrProcessorAnalysisCoverage::kNone, &analysisColor);

            
                    analysisColor.isConstant(&fPatches[0].fColor);

            
                    return result;

            
                }


            private:

            
                void onPrepareDraws(Target* target) override {

            
                    auto gp = LatticeGP::Make(fProxy.get(), fColorSpaceXform, fFilter);

            
                    if (!gp) {

            
                        SkDebugf("Couldn't create GrGeometryProcessor\n");

            
                        return;

            
                    }


                    static constexpr size_t kVertexStide =

            
                            sizeof(SkPoint) + sizeof(SkPoint) + sizeof(SkRect) + sizeof(uint32_t);

            
                    SkASSERT(kVertexStide == gp->debugOnly_vertexStride());


                    int patchCnt = fPatches.count();

            
                    int numRects = 0;

            
                    for (int i = 0; i < patchCnt; i++) {

            
                        numRects += fPatches[i].fIter->numRectsToDraw();

            
                    }


                    if (!numRects) {

            
                        return;

            
                    }


                    sk_sp<const GrBuffer> indexBuffer = target->resourceProvider()->refQuadIndexBuffer();

            
                    PatternHelper helper(target, GrPrimitiveType::kTriangles, kVertexStide, indexBuffer.get(),

            
                                         kVertsPerRect, kIndicesPerRect, numRects);

            
                    void* vertices = helper.vertices();

            
                    if (!vertices || !indexBuffer) {

            
                        SkDebugf("Could not allocate vertices\n");

            
                        return;

            
                    }


                    intptr_t verts = reinterpret_cast<intptr_t>(vertices);

            
                    for (int i = 0; i < patchCnt; i++) {

            
                        const Patch& patch = fPatches[i];


                        // Apply the view matrix here if it is scale-translate.  Otherwise, we need to

            
                        // wait until we've created the dst rects.

            
                        bool isScaleTranslate = patch.fViewMatrix.isScaleTranslate();

            
                        if (isScaleTranslate) {

            
                            patch.fIter->mapDstScaleTranslate(patch.fViewMatrix);

            
                        }


                        SkIRect srcR;

            
                        SkRect dstR;

            
                        intptr_t patchVerts = verts;

            
                        Sk4f scales(1.f / fProxy->width(), 1.f / fProxy->height(),

            
                                    1.f / fProxy->width(), 1.f / fProxy->height());

            
                        static const Sk4f kDomainOffsets(0.5f, 0.5f, -0.5f, -0.5f);

            
                        static const Sk4f kFlipOffsets(0.f, 1, 0.f, 1.f);

            
                        static const Sk4f kFlipMuls(1.f, -1.f, 1.f, -1.f);

            
                        while (patch.fIter->next(&srcR, &dstR)) {

            
                            auto vertices = reinterpret_cast<LatticeGP::Vertex*>(verts);

            
                            SkPointPriv::SetRectTriStrip(&vertices->fPosition, dstR, kVertexStide);

            
                            Sk4f coords(SkIntToScalar(srcR.fLeft), SkIntToScalar(srcR.fTop),

            
                                        SkIntToScalar(srcR.fRight), SkIntToScalar(srcR.fBottom));

            
                            Sk4f domain = coords + kDomainOffsets;

            
                            coords *= scales;

            
                            domain *= scales;

            
                            if (fProxy->origin() == kBottomLeft_GrSurfaceOrigin) {

            
                                coords = kFlipMuls * coords + kFlipOffsets;

            
                                domain = SkNx_shuffle<0, 3, 2, 1>(kFlipMuls * domain + kFlipOffsets);

            
                            }

            
                            SkPointPriv::SetRectTriStrip(&vertices->fTextureCoords, coords[0], coords[1],

            
                                                         coords[2], coords[3], kVertexStide);

            
                            for (int j = 0; j < kVertsPerRect; ++j) {

            
                                vertices[j].fTextureDomain = {domain[0], domain[1], domain[2], domain[3]};

            
                            }


                            for (int j = 0; j < kVertsPerRect; ++j) {

            
                                vertices[j].fColor = patch.fColor;

            
                            }

            
                            verts += kVertsPerRect * kVertexStide;

            
                        }


                        // If we didn't handle it above, apply the matrix here.

            
                        if (!isScaleTranslate) {

            
                            SkPoint* positions = reinterpret_cast<SkPoint*>(patchVerts);

            
                            SkMatrixPriv::MapPointsWithStride(patch.fViewMatrix, positions, kVertexStide,

            
                                                              kVertsPerRect * patch.fIter->numRectsToDraw());

            
                        }

            
                    }

            
                    auto pipe = fHelper.makePipeline(target, 1);

            
                    pipe.fFixedDynamicState->fPrimitiveProcessorTextures[0] = fProxy.get();

            
                    helper.recordDraw(target, std::move(gp), pipe.fPipeline, pipe.fFixedDynamicState);

            
                }


                CombineResult onCombineIfPossible(GrOp* t, const GrCaps& caps) override {

            
                    NonAALatticeOp* that = t->cast<NonAALatticeOp>();

            
                    if (fProxy != that->fProxy) {

            
                        return CombineResult::kCannotCombine;

            
                    }

            
                    if (fFilter != that->fFilter) {

            
                        return CombineResult::kCannotCombine;

            
                    }

            
                    if (GrColorSpaceXform::Equals(fColorSpaceXform.get(), that->fColorSpaceXform.get())) {

            
                        return CombineResult::kCannotCombine;

            
                    }

            
                    if (!fHelper.isCompatible(that->fHelper, caps, this->bounds(), that->bounds())) {

            
                        return CombineResult::kCannotCombine;

            
                    }


                    fPatches.move_back_n(that->fPatches.count(), that->fPatches.begin());

            
                    this->joinBounds(*that);

            
                    return CombineResult::kMerged;

            
                }


                struct Patch {

            
                    SkMatrix fViewMatrix;

            
                    std::unique_ptr<SkLatticeIter> fIter;

            
                    SkRect fDst;

            
                    GrColor fColor;

            
                };


                Helper fHelper;

            
                SkSTArray<1, Patch, true> fPatches;

            
                sk_sp<GrTextureProxy> fProxy;

            
                sk_sp<GrColorSpaceXform> fColorSpaceXform;

            
                GrSamplerState::Filter fFilter;


                typedef GrMeshDrawOp INHERITED;

            
            };


            }  // anonymous namespace


            namespace GrLatticeOp {

            
            std::unique_ptr<GrDrawOp> MakeNonAA(GrContext* context,

            
                                                GrPaint&& paint,

            
                                                const SkMatrix& viewMatrix,

            
                                                sk_sp<GrTextureProxy> proxy,

            
                                                sk_sp<GrColorSpaceXform> colorSpaceXform,

            
                                                GrSamplerState::Filter filter,

            
                                                std::unique_ptr<SkLatticeIter> iter,

            
                                                const SkRect& dst) {

            
                return NonAALatticeOp::Make(context, std::move(paint), viewMatrix, std::move(proxy),

            
                                            std::move(colorSpaceXform), filter, std::move(iter), dst);

            
            }

            
            };


            #if GR_TEST_UTILS

            
            #include "GrContextPriv.h"

            
            #include "GrProxyProvider.h"


            /** Randomly divides subset into count divs. */

            
            static void init_random_divs(int divs[], int count, int subsetStart, int subsetStop,

            
                                         SkRandom* random) {

            
                // Rules for lattice divs: Must be strictly increasing and in the range

            
                // [subsetStart, subsetStop).

            
                // Not terribly efficient alg for generating random divs:

            
                // 1) Start with minimum legal pixels between each div.

            
                // 2) Randomly assign the remaining pixels of the subset to divs.

            
                // 3) Convert from pixel counts to div offsets.


                // 1) Initially each divs[i] represents the number of pixels between

            
                // div i-1 and i. The initial div is allowed to be at subsetStart. There

            
                // must be one pixel spacing between subsequent divs.

            
                divs[0] = 0;

            
                for (int i = 1; i < count; ++i) {

            
                    divs[i] = 1;

            
                }

            
                // 2) Assign the remaining subset pixels to fall

            
                int subsetLength = subsetStop - subsetStart;

            
                for (int i = 0; i < subsetLength - count; ++i) {

            
                    // +1 because count divs means count+1 intervals.

            
                    int entry = random->nextULessThan(count + 1);

            
                    // We don't have an entry to  to store the count after the last div

            
                    if (entry < count) {

            
                        divs[entry]++;

            
                    }

            
                }

            
                // 3) Now convert the counts between divs to pixel indices, incorporating the subset's offset.

            
                int offset = subsetStart;

            
                for (int i = 0; i < count; ++i) {

            
                    divs[i] += offset;

            
                    offset = divs[i];

            
                }

            
            }


            GR_DRAW_OP_TEST_DEFINE(NonAALatticeOp) {

            
                SkCanvas::Lattice lattice;

            
                // We loop because our random lattice code can produce an invalid lattice in the case where

            
                // there is a single div separator in both x and y and both are aligned with the left and top

            
                // edge of the image subset, respectively.

            
                std::unique_ptr<int[]> xdivs;

            
                std::unique_ptr<int[]> ydivs;

            
                std::unique_ptr<SkCanvas::Lattice::RectType[]> flags;

            
                std::unique_ptr<SkColor[]> colors;

            
                SkIRect subset;

            
                GrSurfaceDesc desc;

            
                desc.fConfig = kRGBA_8888_GrPixelConfig;

            
                desc.fWidth = random->nextRangeU(1, 1000);

            
                desc.fHeight = random->nextRangeU(1, 1000);

            
                GrSurfaceOrigin origin =

            
                        random->nextBool() ? kTopLeft_GrSurfaceOrigin : kBottomLeft_GrSurfaceOrigin;

            
                auto proxy = context->contextPriv().proxyProvider()->createProxy(

            
                        desc, origin, SkBackingFit::kExact, SkBudgeted::kYes);


                do {

            
                    if (random->nextBool()) {

            
                        subset.fLeft = random->nextULessThan(desc.fWidth);

            
                        subset.fRight = random->nextRangeU(subset.fLeft + 1, desc.fWidth);

            
                        subset.fTop = random->nextULessThan(desc.fHeight);

            
                        subset.fBottom = random->nextRangeU(subset.fTop + 1, desc.fHeight);

            
                    } else {

            
                        subset.setXYWH(0, 0, desc.fWidth, desc.fHeight);

            
                    }

            
                    // SkCanvas::Lattice allows bounds to be null. However, SkCanvas creates a temp Lattice with

            
                    // a non-null bounds before creating a SkLatticeIter since SkLatticeIter requires a bounds.

            
                    lattice.fBounds = &subset;

            
                    lattice.fXCount = random->nextRangeU(1, subset.width());

            
                    lattice.fYCount = random->nextRangeU(1, subset.height());

            
                    xdivs.reset(new int[lattice.fXCount]);

            
                    ydivs.reset(new int[lattice.fYCount]);

            
                    init_random_divs(xdivs.get(), lattice.fXCount, subset.fLeft, subset.fRight, random);

            
                    init_random_divs(ydivs.get(), lattice.fYCount, subset.fTop, subset.fBottom, random);

            
                    lattice.fXDivs = xdivs.get();

            
                    lattice.fYDivs = ydivs.get();

            
                    bool hasFlags = random->nextBool();

            
                    if (hasFlags) {

            
                        int n = (lattice.fXCount + 1) * (lattice.fYCount + 1);

            
                        flags.reset(new SkCanvas::Lattice::RectType[n]);

            
                        colors.reset(new SkColor[n]);

            
                        for (int i = 0; i < n; ++i) {

            
                            flags[i] = random->nextBool() ? SkCanvas::Lattice::kTransparent

            
                                                          : SkCanvas::Lattice::kDefault;

            
                        }

            
                        lattice.fRectTypes = flags.get();

            
                        lattice.fColors = colors.get();

            
                    } else {

            
                        lattice.fRectTypes = nullptr;

            
                        lattice.fColors = nullptr;

            
                    }

            
                } while (!SkLatticeIter::Valid(desc.fWidth, desc.fHeight, lattice));

            
                SkRect dst;

            
                dst.fLeft = random->nextRangeScalar(-2000.5f, 1000.f);

            
                dst.fTop = random->nextRangeScalar(-2000.5f, 1000.f);

            
                dst.fRight = dst.fLeft + random->nextRangeScalar(0.5f, 1000.f);

            
                dst.fBottom = dst.fTop + random->nextRangeScalar(0.5f, 1000.f);

            
                std::unique_ptr<SkLatticeIter> iter(new SkLatticeIter(lattice, dst));

            
                SkMatrix viewMatrix = GrTest::TestMatrixPreservesRightAngles(random);

            
                auto csxf = GrTest::TestColorXform(random);

            
                GrSamplerState::Filter filter =

            
                        random->nextBool() ? GrSamplerState::Filter::kNearest : GrSamplerState::Filter::kBilerp;

            
                return NonAALatticeOp::Make(context, std::move(paint), viewMatrix, std::move(proxy),

            
                                            std::move(csxf), filter, std::move(iter), dst);

            
            }


            #endif
	/*
	* 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 "GrLatticeOp.h"
	#include "GrDefaultGeoProcFactory.h"
	#include "GrDrawOpTest.h"
	#include "GrMeshDrawOp.h"
	#include "GrOpFlushState.h"
	#include "GrResourceProvider.h"
	#include "GrSimpleMeshDrawOpHelper.h"
	#include "SkBitmap.h"
	#include "SkLatticeIter.h"
	#include "SkMatrixPriv.h"
	#include "SkPointPriv.h"
	#include "SkRect.h"
	#include "glsl/GrGLSLColorSpaceXformHelper.h"
	#include "glsl/GrGLSLGeometryProcessor.h"
	#include "glsl/GrGLSLVarying.h"

	namespace {

	class LatticeGP : public GrGeometryProcessor {
	public:
	struct Vertex {
	SkPoint fPosition;
	SkPoint fTextureCoords;
	SkRect fTextureDomain;
	GrColor fColor;
	};

	static sk_sp<GrGeometryProcessor> Make(const GrTextureProxy* proxy,
	sk_sp<GrColorSpaceXform> csxf,
	GrSamplerState::Filter filter) {
	return sk_sp<GrGeometryProcessor>(new LatticeGP(proxy, std::move(csxf), filter));
	}

	const char* name() const override { return "LatticeGP"; }

	void getGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder* b) const override {
	b->add32(GrColorSpaceXform::XformKey(fColorSpaceXform.get()));
	}

	GrGLSLPrimitiveProcessor* createGLSLInstance(const GrShaderCaps& caps) const override {
	class GLSLProcessor : public GrGLSLGeometryProcessor {
	public:
	void setData(const GrGLSLProgramDataManager& pdman, const GrPrimitiveProcessor& proc,
	FPCoordTransformIter&& transformIter) override {
	const auto& latticeGP = proc.cast<LatticeGP>();
	this->setTransformDataHelper(SkMatrix::I(), pdman, &transformIter);
	fColorSpaceXformHelper.setData(pdman, latticeGP.fColorSpaceXform.get());
	}

	private:
	void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override {
	using Interpolation = GrGLSLVaryingHandler::Interpolation;
	const auto& latticeGP = args.fGP.cast<LatticeGP>();
	fColorSpaceXformHelper.emitCode(args.fUniformHandler,
	latticeGP.fColorSpaceXform.get());

	args.fVaryingHandler->emitAttributes(latticeGP);
	this->writeOutputPosition(args.fVertBuilder, gpArgs, latticeGP.kPositions.name());
	this->emitTransforms(args.fVertBuilder,
	args.fVaryingHandler,
	args.fUniformHandler,
	latticeGP.kTextureCoords.asShaderVar(),
	args.fFPCoordTransformHandler);
	args.fFragBuilder->codeAppend("float2 textureCoords;");
	args.fVaryingHandler->addPassThroughAttribute(latticeGP.kTextureCoords,
	"textureCoords");
	args.fFragBuilder->codeAppend("float4 textureDomain;");
	args.fVaryingHandler->addPassThroughAttribute(
	latticeGP.kTextureDomain, "textureDomain", Interpolation::kCanBeFlat);
	args.fVaryingHandler->addPassThroughAttribute(latticeGP.kColors, args.fOutputColor,
	Interpolation::kCanBeFlat);
	args.fFragBuilder->codeAppendf("%s = ", args.fOutputColor);
	args.fFragBuilder->appendTextureLookupAndModulate(
	args.fOutputColor,
	args.fTexSamplers[0],
	"clamp(textureCoords, textureDomain.xy, textureDomain.zw)",
	kFloat2_GrSLType,
	&fColorSpaceXformHelper);
	args.fFragBuilder->codeAppend(";");
	args.fFragBuilder->codeAppendf("%s = half4(1);", args.fOutputCoverage);
	}
	GrGLSLColorSpaceXformHelper fColorSpaceXformHelper;
	};
	return new GLSLProcessor;
	}

	private:
	LatticeGP(const GrTextureProxy* proxy, sk_sp<GrColorSpaceXform> csxf,
	GrSamplerState::Filter filter)
	: INHERITED(kLatticeGP_ClassID), fColorSpaceXform(std::move(csxf)) {
	fSampler.reset(proxy->textureType(), proxy->config(), filter);
	this->setTextureSamplerCnt(1);
	this->setVertexAttributeCnt(4);
	}

	const Attribute& onVertexAttribute(int i) const override {
	return IthAttribute(i, kPositions, kTextureCoords, kTextureDomain, kColors);
	}

	const TextureSampler& onTextureSampler(int) const override { return fSampler; }

	static constexpr Attribute kPositions = {"position", kFloat2_GrVertexAttribType};
	static constexpr Attribute kTextureCoords = {"textureCoords", kFloat2_GrVertexAttribType};
	static constexpr Attribute kTextureDomain = {"textureDomain", kFloat4_GrVertexAttribType};
	static constexpr Attribute kColors = {"color", kUByte4_norm_GrVertexAttribType};

	sk_sp<GrColorSpaceXform> fColorSpaceXform;
	TextureSampler fSampler;

	typedef GrGeometryProcessor INHERITED;
	};

	constexpr GrPrimitiveProcessor::Attribute LatticeGP::kPositions;
	constexpr GrPrimitiveProcessor::Attribute LatticeGP::kTextureCoords;
	constexpr GrPrimitiveProcessor::Attribute LatticeGP::kTextureDomain;
	constexpr GrPrimitiveProcessor::Attribute LatticeGP::kColors;

	class NonAALatticeOp final : public GrMeshDrawOp {
	private:
	using Helper = GrSimpleMeshDrawOpHelper;

	public:
	DEFINE_OP_CLASS_ID

	static const int kVertsPerRect = 4;
	static const int kIndicesPerRect = 6;

	static std::unique_ptr<GrDrawOp> Make(GrContext* context,
	GrPaint&& paint,
	const SkMatrix& viewMatrix,
	sk_sp<GrTextureProxy> proxy,
	sk_sp<GrColorSpaceXform> colorSpaceXForm,
	GrSamplerState::Filter filter,
	std::unique_ptr<SkLatticeIter> iter,
	const SkRect& dst) {
	SkASSERT(proxy);
	return Helper::FactoryHelper<NonAALatticeOp>(context, std::move(paint), viewMatrix,
	std::move(proxy),
	std::move(colorSpaceXForm), filter,
	std::move(iter), dst);
	}

	NonAALatticeOp(Helper::MakeArgs& helperArgs, GrColor color, const SkMatrix& viewMatrix,
	sk_sp<GrTextureProxy> proxy, sk_sp<GrColorSpaceXform> colorSpaceXform,
	GrSamplerState::Filter filter, std::unique_ptr<SkLatticeIter> iter,
	const SkRect& dst)
	: INHERITED(ClassID())
	, fHelper(helperArgs, GrAAType::kNone)
	, fProxy(std::move(proxy))
	, fColorSpaceXform(std::move(colorSpaceXform))
	, fFilter(filter) {
	Patch& patch = fPatches.push_back();
	patch.fViewMatrix = viewMatrix;
	patch.fColor = color;
	patch.fIter = std::move(iter);
	patch.fDst = dst;

	// setup bounds
	this->setTransformedBounds(patch.fDst, viewMatrix, HasAABloat::kNo, IsZeroArea::kNo);
	}

	const char* name() const override { return "NonAALatticeOp"; }

	void visitProxies(const VisitProxyFunc& func) const override {
	func(fProxy.get());
	fHelper.visitProxies(func);
	}

	SkString dumpInfo() const override {
	SkString str;

	for (int i = 0; i < fPatches.count(); ++i) {
	str.appendf("%d: Color: 0x%08x Dst [L: %.2f, T: %.2f, R: %.2f, B: %.2f]\n", i,
	fPatches[i].fColor, fPatches[i].fDst.fLeft, fPatches[i].fDst.fTop,
	fPatches[i].fDst.fRight, fPatches[i].fDst.fBottom);
	}

	str += fHelper.dumpInfo();
	str += INHERITED::dumpInfo();
	return str;
	}

	FixedFunctionFlags fixedFunctionFlags() const override { return fHelper.fixedFunctionFlags(); }

	RequiresDstTexture finalize(const GrCaps& caps, const GrAppliedClip* clip) override {
	auto opaque = GrColorIsOpaque(fPatches[0].fColor) && GrPixelConfigIsOpaque(fProxy->config())
	? GrProcessorAnalysisColor::Opaque::kYes
	: GrProcessorAnalysisColor::Opaque::kNo;
	auto analysisColor = GrProcessorAnalysisColor(opaque);
	auto result = fHelper.xpRequiresDstTexture(
	caps, clip, GrProcessorAnalysisCoverage::kNone, &analysisColor);
	analysisColor.isConstant(&fPatches[0].fColor);
	return result;
	}

	private:
	void onPrepareDraws(Target* target) override {
	auto gp = LatticeGP::Make(fProxy.get(), fColorSpaceXform, fFilter);
	if (!gp) {
	SkDebugf("Couldn't create GrGeometryProcessor\n");
	return;
	}

	static constexpr size_t kVertexStide =
	sizeof(SkPoint) + sizeof(SkPoint) + sizeof(SkRect) + sizeof(uint32_t);
	SkASSERT(kVertexStide == gp->debugOnly_vertexStride());

	int patchCnt = fPatches.count();
	int numRects = 0;
	for (int i = 0; i < patchCnt; i++) {
	numRects += fPatches[i].fIter->numRectsToDraw();
	}

	if (!numRects) {
	return;
	}

	sk_sp<const GrBuffer> indexBuffer = target->resourceProvider()->refQuadIndexBuffer();
	PatternHelper helper(target, GrPrimitiveType::kTriangles, kVertexStide, indexBuffer.get(),
	kVertsPerRect, kIndicesPerRect, numRects);
	void* vertices = helper.vertices();
	if (!vertices \|\| !indexBuffer) {
	SkDebugf("Could not allocate vertices\n");
	return;
	}

	intptr_t verts = reinterpret_cast<intptr_t>(vertices);
	for (int i = 0; i < patchCnt; i++) {
	const Patch& patch = fPatches[i];

	// Apply the view matrix here if it is scale-translate. Otherwise, we need to
	// wait until we've created the dst rects.
	bool isScaleTranslate = patch.fViewMatrix.isScaleTranslate();
	if (isScaleTranslate) {
	patch.fIter->mapDstScaleTranslate(patch.fViewMatrix);
	}

	SkIRect srcR;
	SkRect dstR;
	intptr_t patchVerts = verts;
	Sk4f scales(1.f / fProxy->width(), 1.f / fProxy->height(),
	1.f / fProxy->width(), 1.f / fProxy->height());
	static const Sk4f kDomainOffsets(0.5f, 0.5f, -0.5f, -0.5f);
	static const Sk4f kFlipOffsets(0.f, 1, 0.f, 1.f);
	static const Sk4f kFlipMuls(1.f, -1.f, 1.f, -1.f);
	while (patch.fIter->next(&srcR, &dstR)) {
	auto vertices = reinterpret_cast<LatticeGP::Vertex*>(verts);
	SkPointPriv::SetRectTriStrip(&vertices->fPosition, dstR, kVertexStide);
	Sk4f coords(SkIntToScalar(srcR.fLeft), SkIntToScalar(srcR.fTop),
	SkIntToScalar(srcR.fRight), SkIntToScalar(srcR.fBottom));
	Sk4f domain = coords + kDomainOffsets;
	coords *= scales;
	domain *= scales;
	if (fProxy->origin() == kBottomLeft_GrSurfaceOrigin) {
	coords = kFlipMuls * coords + kFlipOffsets;
	domain = SkNx_shuffle<0, 3, 2, 1>(kFlipMuls * domain + kFlipOffsets);
	}
	SkPointPriv::SetRectTriStrip(&vertices->fTextureCoords, coords[0], coords[1],
	coords[2], coords[3], kVertexStide);
	for (int j = 0; j < kVertsPerRect; ++j) {
	vertices[j].fTextureDomain = {domain[0], domain[1], domain[2], domain[3]};
	}

	for (int j = 0; j < kVertsPerRect; ++j) {
	vertices[j].fColor = patch.fColor;
	}
	verts += kVertsPerRect * kVertexStide;
	}

	// If we didn't handle it above, apply the matrix here.
	if (!isScaleTranslate) {
	SkPoint* positions = reinterpret_cast<SkPoint*>(patchVerts);
	SkMatrixPriv::MapPointsWithStride(patch.fViewMatrix, positions, kVertexStide,
	kVertsPerRect * patch.fIter->numRectsToDraw());
	}
	}
	auto pipe = fHelper.makePipeline(target, 1);
	pipe.fFixedDynamicState->fPrimitiveProcessorTextures[0] = fProxy.get();
	helper.recordDraw(target, std::move(gp), pipe.fPipeline, pipe.fFixedDynamicState);
	}

	CombineResult onCombineIfPossible(GrOp* t, const GrCaps& caps) override {
	NonAALatticeOp* that = t->cast<NonAALatticeOp>();
	if (fProxy != that->fProxy) {
	return CombineResult::kCannotCombine;
	}
	if (fFilter != that->fFilter) {
	return CombineResult::kCannotCombine;
	}
	if (GrColorSpaceXform::Equals(fColorSpaceXform.get(), that->fColorSpaceXform.get())) {
	return CombineResult::kCannotCombine;
	}
	if (!fHelper.isCompatible(that->fHelper, caps, this->bounds(), that->bounds())) {
	return CombineResult::kCannotCombine;
	}

	fPatches.move_back_n(that->fPatches.count(), that->fPatches.begin());
	this->joinBounds(*that);
	return CombineResult::kMerged;
	}

	struct Patch {
	SkMatrix fViewMatrix;
	std::unique_ptr<SkLatticeIter> fIter;
	SkRect fDst;
	GrColor fColor;
	};

	Helper fHelper;
	SkSTArray<1, Patch, true> fPatches;
	sk_sp<GrTextureProxy> fProxy;
	sk_sp<GrColorSpaceXform> fColorSpaceXform;
	GrSamplerState::Filter fFilter;

	typedef GrMeshDrawOp INHERITED;
	};

	} // anonymous namespace

	namespace GrLatticeOp {
	std::unique_ptr<GrDrawOp> MakeNonAA(GrContext* context,
	GrPaint&& paint,
	const SkMatrix& viewMatrix,
	sk_sp<GrTextureProxy> proxy,
	sk_sp<GrColorSpaceXform> colorSpaceXform,
	GrSamplerState::Filter filter,
	std::unique_ptr<SkLatticeIter> iter,
	const SkRect& dst) {
	return NonAALatticeOp::Make(context, std::move(paint), viewMatrix, std::move(proxy),
	std::move(colorSpaceXform), filter, std::move(iter), dst);
	}
	};

	#if GR_TEST_UTILS
	#include "GrContextPriv.h"
	#include "GrProxyProvider.h"

	/** Randomly divides subset into count divs. */
	static void init_random_divs(int divs[], int count, int subsetStart, int subsetStop,
	SkRandom* random) {
	// Rules for lattice divs: Must be strictly increasing and in the range
	// [subsetStart, subsetStop).
	// Not terribly efficient alg for generating random divs:
	// 1) Start with minimum legal pixels between each div.
	// 2) Randomly assign the remaining pixels of the subset to divs.
	// 3) Convert from pixel counts to div offsets.

	// 1) Initially each divs[i] represents the number of pixels between
	// div i-1 and i. The initial div is allowed to be at subsetStart. There
	// must be one pixel spacing between subsequent divs.
	divs[0] = 0;
	for (int i = 1; i < count; ++i) {
	divs[i] = 1;
	}
	// 2) Assign the remaining subset pixels to fall
	int subsetLength = subsetStop - subsetStart;
	for (int i = 0; i < subsetLength - count; ++i) {
	// +1 because count divs means count+1 intervals.
	int entry = random->nextULessThan(count + 1);
	// We don't have an entry to to store the count after the last div
	if (entry < count) {
	divs[entry]++;
	}
	}
	// 3) Now convert the counts between divs to pixel indices, incorporating the subset's offset.
	int offset = subsetStart;
	for (int i = 0; i < count; ++i) {
	divs[i] += offset;
	offset = divs[i];
	}
	}

	GR_DRAW_OP_TEST_DEFINE(NonAALatticeOp) {
	SkCanvas::Lattice lattice;
	// We loop because our random lattice code can produce an invalid lattice in the case where
	// there is a single div separator in both x and y and both are aligned with the left and top
	// edge of the image subset, respectively.
	std::unique_ptr<int[]> xdivs;
	std::unique_ptr<int[]> ydivs;
	std::unique_ptr<SkCanvas::Lattice::RectType[]> flags;
	std::unique_ptr<SkColor[]> colors;
	SkIRect subset;
	GrSurfaceDesc desc;
	desc.fConfig = kRGBA_8888_GrPixelConfig;
	desc.fWidth = random->nextRangeU(1, 1000);
	desc.fHeight = random->nextRangeU(1, 1000);
	GrSurfaceOrigin origin =
	random->nextBool() ? kTopLeft_GrSurfaceOrigin : kBottomLeft_GrSurfaceOrigin;
	auto proxy = context->contextPriv().proxyProvider()->createProxy(
	desc, origin, SkBackingFit::kExact, SkBudgeted::kYes);

	do {
	if (random->nextBool()) {
	subset.fLeft = random->nextULessThan(desc.fWidth);
	subset.fRight = random->nextRangeU(subset.fLeft + 1, desc.fWidth);
	subset.fTop = random->nextULessThan(desc.fHeight);
	subset.fBottom = random->nextRangeU(subset.fTop + 1, desc.fHeight);
	} else {
	subset.setXYWH(0, 0, desc.fWidth, desc.fHeight);
	}
	// SkCanvas::Lattice allows bounds to be null. However, SkCanvas creates a temp Lattice with
	// a non-null bounds before creating a SkLatticeIter since SkLatticeIter requires a bounds.
	lattice.fBounds = &subset;
	lattice.fXCount = random->nextRangeU(1, subset.width());
	lattice.fYCount = random->nextRangeU(1, subset.height());
	xdivs.reset(new int[lattice.fXCount]);
	ydivs.reset(new int[lattice.fYCount]);
	init_random_divs(xdivs.get(), lattice.fXCount, subset.fLeft, subset.fRight, random);
	init_random_divs(ydivs.get(), lattice.fYCount, subset.fTop, subset.fBottom, random);
	lattice.fXDivs = xdivs.get();
	lattice.fYDivs = ydivs.get();
	bool hasFlags = random->nextBool();
	if (hasFlags) {
	int n = (lattice.fXCount + 1) * (lattice.fYCount + 1);
	flags.reset(new SkCanvas::Lattice::RectType[n]);
	colors.reset(new SkColor[n]);
	for (int i = 0; i < n; ++i) {
	flags[i] = random->nextBool() ? SkCanvas::Lattice::kTransparent
	: SkCanvas::Lattice::kDefault;
	}
	lattice.fRectTypes = flags.get();
	lattice.fColors = colors.get();
	} else {
	lattice.fRectTypes = nullptr;
	lattice.fColors = nullptr;
	}
	} while (!SkLatticeIter::Valid(desc.fWidth, desc.fHeight, lattice));
	SkRect dst;
	dst.fLeft = random->nextRangeScalar(-2000.5f, 1000.f);
	dst.fTop = random->nextRangeScalar(-2000.5f, 1000.f);
	dst.fRight = dst.fLeft + random->nextRangeScalar(0.5f, 1000.f);
	dst.fBottom = dst.fTop + random->nextRangeScalar(0.5f, 1000.f);
	std::unique_ptr<SkLatticeIter> iter(new SkLatticeIter(lattice, dst));
	SkMatrix viewMatrix = GrTest::TestMatrixPreservesRightAngles(random);
	auto csxf = GrTest::TestColorXform(random);
	GrSamplerState::Filter filter =
	random->nextBool() ? GrSamplerState::Filter::kNearest : GrSamplerState::Filter::kBilerp;
	return NonAALatticeOp::Make(context, std::move(paint), viewMatrix, std::move(proxy),
	std::move(csxf), filter, std::move(iter), dst);
	}

	#endif