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289 lines
9.2 KiB
289 lines
9.2 KiB
/*
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* Copyright 2014 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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// This test only works with the GPU backend.
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#include "gm.h"
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#include "GrContext.h"
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#include "GrDefaultGeoProcFactory.h"
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#include "GrMemoryPool.h"
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#include "GrOpFlushState.h"
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#include "GrPathUtils.h"
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#include "GrRenderTargetContextPriv.h"
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#include "SkColorPriv.h"
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#include "SkGeometry.h"
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#include "SkPointPriv.h"
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#include "SkTLList.h"
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#include "effects/GrConvexPolyEffect.h"
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#include "ops/GrMeshDrawOp.h"
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/** outset rendered rect to visualize anti-aliased poly edges */
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static SkRect outset(const SkRect& unsorted) {
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SkRect r = unsorted;
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r.outset(5.f, 5.f);
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return r;
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}
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/** sorts a rect */
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static SkRect sorted_rect(const SkRect& unsorted) {
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SkRect r = unsorted;
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r.sort();
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return r;
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}
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namespace skiagm {
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class PolyBoundsOp : public GrMeshDrawOp {
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public:
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DEFINE_OP_CLASS_ID
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static std::unique_ptr<GrDrawOp> Make(GrContext* context,
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GrPaint&& paint,
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const SkRect& rect) {
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GrOpMemoryPool* pool = context->contextPriv().opMemoryPool();
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return pool->allocate<PolyBoundsOp>(std::move(paint), rect);
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}
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const char* name() const override { return "PolyBoundsOp"; }
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void visitProxies(const VisitProxyFunc& func, VisitorType) const override {
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fProcessors.visitProxies(func);
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}
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FixedFunctionFlags fixedFunctionFlags() const override { return FixedFunctionFlags::kNone; }
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GrProcessorSet::Analysis finalize(const GrCaps& caps, const GrAppliedClip* clip) override {
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return fProcessors.finalize(fColor, GrProcessorAnalysisCoverage::kNone, clip, false, caps,
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&fColor);
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}
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private:
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friend class ::GrOpMemoryPool; // for ctor
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PolyBoundsOp(GrPaint&& paint, const SkRect& rect)
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: INHERITED(ClassID())
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, fColor(paint.getColor4f())
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, fProcessors(std::move(paint))
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, fRect(outset(rect)) {
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this->setBounds(sorted_rect(fRect), HasAABloat::kNo, IsZeroArea::kNo);
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}
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void onPrepareDraws(Target* target) override {
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using namespace GrDefaultGeoProcFactory;
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Color color(fColor);
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sk_sp<GrGeometryProcessor> gp(GrDefaultGeoProcFactory::Make(
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target->caps().shaderCaps(),
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color,
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Coverage::kSolid_Type,
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LocalCoords::kUnused_Type,
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SkMatrix::I()));
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SkASSERT(gp->vertexStride() == sizeof(SkPoint));
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QuadHelper helper(target, sizeof(SkPoint), 1);
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SkPoint* verts = reinterpret_cast<SkPoint*>(helper.vertices());
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if (!verts) {
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return;
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}
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SkPointPriv::SetRectTriStrip(verts, fRect, sizeof(SkPoint));
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auto pipe = target->makePipeline(0, std::move(fProcessors), target->detachAppliedClip());
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helper.recordDraw(target, std::move(gp), pipe.fPipeline, pipe.fFixedDynamicState);
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}
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SkPMColor4f fColor;
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GrProcessorSet fProcessors;
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SkRect fRect;
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typedef GrMeshDrawOp INHERITED;
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};
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/**
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* This GM directly exercises a GrProcessor that draws convex polygons.
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*/
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class ConvexPolyEffect : public GM {
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public:
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ConvexPolyEffect() {
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this->setBGColor(0xFFFFFFFF);
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}
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protected:
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SkString onShortName() override {
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return SkString("convex_poly_effect");
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}
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SkISize onISize() override {
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return SkISize::Make(720, 800);
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}
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void onOnceBeforeDraw() override {
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SkPath tri;
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tri.moveTo(5.f, 5.f);
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tri.lineTo(100.f, 20.f);
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tri.lineTo(15.f, 100.f);
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fPaths.addToTail(tri);
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fPaths.addToTail(SkPath())->reverseAddPath(tri);
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tri.close();
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fPaths.addToTail(tri);
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SkPath ngon;
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constexpr SkScalar kRadius = 50.f;
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const SkPoint center = { kRadius, kRadius };
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for (int i = 0; i < GrConvexPolyEffect::kMaxEdges; ++i) {
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SkScalar angle = 2 * SK_ScalarPI * i / GrConvexPolyEffect::kMaxEdges;
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SkPoint point;
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point.fY = SkScalarSinCos(angle, &point.fX);
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point.scale(kRadius);
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point = center + point;
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if (0 == i) {
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ngon.moveTo(point);
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} else {
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ngon.lineTo(point);
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}
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}
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fPaths.addToTail(ngon);
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SkMatrix scaleM;
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scaleM.setScale(1.1f, 0.4f);
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ngon.transform(scaleM);
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fPaths.addToTail(ngon);
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SkPath linePath;
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linePath.moveTo(5.f, 5.f);
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linePath.lineTo(6.f, 6.f);
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fPaths.addToTail(linePath);
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// integer edges
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fRects.addToTail(SkRect::MakeLTRB(5.f, 1.f, 30.f, 25.f));
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// half-integer edges
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fRects.addToTail(SkRect::MakeLTRB(5.5f, 0.5f, 29.5f, 24.5f));
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// vertically/horizontally thin rects that cover pixel centers
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fRects.addToTail(SkRect::MakeLTRB(5.25f, 0.5f, 5.75f, 24.5f));
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fRects.addToTail(SkRect::MakeLTRB(5.5f, 0.5f, 29.5f, 0.75f));
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// vertically/horizontally thin rects that don't cover pixel centers
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fRects.addToTail(SkRect::MakeLTRB(5.55f, 0.5f, 5.75f, 24.5f));
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fRects.addToTail(SkRect::MakeLTRB(5.5f, .05f, 29.5f, .25f));
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// small in x and y
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fRects.addToTail(SkRect::MakeLTRB(5.05f, .55f, 5.45f, .85f));
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// inverted in x and y
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fRects.addToTail(SkRect::MakeLTRB(100.f, 50.5f, 5.f, 0.5f));
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}
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void onDraw(SkCanvas* canvas) override {
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GrRenderTargetContext* renderTargetContext =
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canvas->internal_private_accessTopLayerRenderTargetContext();
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if (!renderTargetContext) {
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skiagm::GM::DrawGpuOnlyMessage(canvas);
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return;
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}
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GrContext* context = canvas->getGrContext();
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if (!context) {
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return;
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}
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SkScalar y = 0;
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constexpr SkScalar kDX = 12.f;
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for (PathList::Iter iter(fPaths, PathList::Iter::kHead_IterStart);
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iter.get();
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iter.next()) {
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const SkPath* path = iter.get();
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SkScalar x = 0;
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for (int et = 0; et < kGrClipEdgeTypeCnt; ++et) {
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const SkMatrix m = SkMatrix::MakeTrans(x, y);
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SkPath p;
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path->transform(m, &p);
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GrClipEdgeType edgeType = (GrClipEdgeType) et;
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std::unique_ptr<GrFragmentProcessor> fp(GrConvexPolyEffect::Make(edgeType, p));
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if (!fp) {
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continue;
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}
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GrPaint grPaint;
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grPaint.setColor4f({ 0, 0, 0, 1.f });
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grPaint.setXPFactory(GrPorterDuffXPFactory::Get(SkBlendMode::kSrc));
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grPaint.addCoverageFragmentProcessor(std::move(fp));
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std::unique_ptr<GrDrawOp> op =
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PolyBoundsOp::Make(context, std::move(grPaint), p.getBounds());
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renderTargetContext->priv().testingOnly_addDrawOp(std::move(op));
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x += SkScalarCeilToScalar(path->getBounds().width() + kDX);
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}
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// Draw AA and non AA paths using normal API for reference.
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canvas->save();
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canvas->translate(x, y);
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SkPaint paint;
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canvas->drawPath(*path, paint);
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canvas->translate(path->getBounds().width() + 10.f, 0);
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paint.setAntiAlias(true);
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canvas->drawPath(*path, paint);
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canvas->restore();
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y += SkScalarCeilToScalar(path->getBounds().height() + 20.f);
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}
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for (RectList::Iter iter(fRects, RectList::Iter::kHead_IterStart);
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iter.get();
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iter.next()) {
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SkScalar x = 0;
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for (int et = 0; et < kGrClipEdgeTypeCnt; ++et) {
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SkRect rect = *iter.get();
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rect.offset(x, y);
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GrClipEdgeType edgeType = (GrClipEdgeType) et;
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std::unique_ptr<GrFragmentProcessor> fp(GrConvexPolyEffect::Make(edgeType, rect));
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if (!fp) {
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continue;
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}
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GrPaint grPaint;
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grPaint.setColor4f({ 0, 0, 0, 1.f });
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grPaint.setXPFactory(GrPorterDuffXPFactory::Get(SkBlendMode::kSrc));
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grPaint.addCoverageFragmentProcessor(std::move(fp));
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std::unique_ptr<GrDrawOp> op = PolyBoundsOp::Make(context, std::move(grPaint),
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rect);
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renderTargetContext->priv().testingOnly_addDrawOp(std::move(op));
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x += SkScalarCeilToScalar(rect.width() + kDX);
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}
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// Draw rect without and with AA using normal API for reference
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canvas->save();
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canvas->translate(x, y);
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SkPaint paint;
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canvas->drawRect(*iter.get(), paint);
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x += SkScalarCeilToScalar(iter.get()->width() + kDX);
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paint.setAntiAlias(true);
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canvas->drawRect(*iter.get(), paint);
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canvas->restore();
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y += SkScalarCeilToScalar(iter.get()->height() + 20.f);
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}
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}
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private:
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typedef SkTLList<SkPath, 1> PathList;
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typedef SkTLList<SkRect, 1> RectList;
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PathList fPaths;
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RectList fRects;
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typedef GM INHERITED;
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};
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DEF_GM(return new ConvexPolyEffect;)
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}
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