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474 lines
17 KiB
474 lines
17 KiB
/*
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* Copyright 2013 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 "sk_tool_utils.h"
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#include "GrContext.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 "SkPoint3.h"
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#include "SkPointPriv.h"
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#include "effects/GrBezierEffect.h"
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#include "ops/GrMeshDrawOp.h"
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namespace skiagm {
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class BezierTestOp : public GrMeshDrawOp {
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public:
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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 fProcessorSet.finalize(fColor, GrProcessorAnalysisCoverage::kSingleChannel, clip,
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false, caps, &fColor);
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}
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void visitProxies(const VisitProxyFunc& func, VisitorType) const override {
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fProcessorSet.visitProxies(func);
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}
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protected:
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BezierTestOp(sk_sp<const GrGeometryProcessor> gp, const SkRect& rect, const SkPMColor4f& color,
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int32_t classID)
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: INHERITED(classID)
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, fRect(rect)
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, fColor(color)
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, fGeometryProcessor(std::move(gp))
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, fProcessorSet(SkBlendMode::kSrc) {
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this->setBounds(rect, HasAABloat::kYes, IsZeroArea::kNo);
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}
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Target::PipelineAndFixedDynamicState makePipeline(Target* target) {
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return target->makePipeline(0, std::move(fProcessorSet), target->detachAppliedClip());
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}
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sk_sp<const GrGeometryProcessor> gp() const { return fGeometryProcessor; }
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const SkRect& rect() const { return fRect; }
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const SkPMColor4f& color() const { return fColor; }
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private:
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SkRect fRect;
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SkPMColor4f fColor;
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sk_sp<const GrGeometryProcessor> fGeometryProcessor;
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GrProcessorSet fProcessorSet;
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typedef GrMeshDrawOp INHERITED;
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};
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/**
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* This GM directly exercises effects that draw Bezier curves in the GPU backend.
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*/
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class BezierConicTestOp : public BezierTestOp {
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public:
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DEFINE_OP_CLASS_ID
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const char* name() const override { return "BezierConicTestOp"; }
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static std::unique_ptr<GrDrawOp> Make(GrContext* context,
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sk_sp<const GrGeometryProcessor> gp,
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const SkRect& rect,
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const SkPMColor4f& color,
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const SkMatrix& klm) {
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GrOpMemoryPool* pool = context->contextPriv().opMemoryPool();
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return pool->allocate<BezierConicTestOp>(std::move(gp), rect, color, klm);
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}
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private:
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friend class ::GrOpMemoryPool; // for ctor
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BezierConicTestOp(sk_sp<const GrGeometryProcessor> gp, const SkRect& rect,
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const SkPMColor4f& color, const SkMatrix& klm)
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: INHERITED(std::move(gp), rect, color, ClassID()), fKLM(klm) {}
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struct Vertex {
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SkPoint fPosition;
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float fKLM[4]; // The last value is ignored. The effect expects a vec4f.
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};
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void onPrepareDraws(Target* target) override {
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SkASSERT(this->gp()->vertexStride() == sizeof(Vertex));
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QuadHelper helper(target, sizeof(Vertex), 1);
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Vertex* verts = reinterpret_cast<Vertex*>(helper.vertices());
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if (!verts) {
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return;
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}
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SkRect rect = this->rect();
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SkPointPriv::SetRectTriStrip(&verts[0].fPosition, rect.fLeft, rect.fTop, rect.fRight,
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rect.fBottom, sizeof(Vertex));
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for (int v = 0; v < 4; ++v) {
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SkPoint3 pt3 = {verts[v].fPosition.x(), verts[v].fPosition.y(), 1.f};
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fKLM.mapHomogeneousPoints((SkPoint3* ) verts[v].fKLM, &pt3, 1);
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}
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auto pipe = this->makePipeline(target);
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helper.recordDraw(target, this->gp(), pipe.fPipeline, pipe.fFixedDynamicState);
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}
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SkMatrix fKLM;
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static constexpr int kVertsPerCubic = 4;
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static constexpr int kIndicesPerCubic = 6;
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typedef BezierTestOp INHERITED;
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};
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/**
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* This GM directly exercises effects that draw Bezier curves in the GPU backend.
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*/
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class BezierConicEffects : public GM {
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public:
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BezierConicEffects() {
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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("bezier_conic_effects");
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}
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SkISize onISize() override {
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return SkISize::Make(800, 800);
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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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struct Vertex {
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SkPoint fPosition;
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float fKLM[4]; // The last value is ignored. The effect expects a vec4f.
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};
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constexpr int kNumConics = 10;
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SkRandom rand;
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// Mult by 3 for each edge effect type
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int numCols = SkScalarCeilToInt(SkScalarSqrt(SkIntToScalar(kNumConics*3)));
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int numRows = SkScalarCeilToInt(SkIntToScalar(kNumConics*3) / numCols);
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SkScalar w = SkIntToScalar(renderTargetContext->width()) / numCols;
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SkScalar h = SkIntToScalar(renderTargetContext->height()) / numRows;
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int row = 0;
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int col = 0;
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SkPMColor4f color = SkPMColor4f::FromBytes_RGBA(0xff000000);
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for (int i = 0; i < kNumConics; ++i) {
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SkPoint baseControlPts[] = {
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{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)},
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{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)},
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{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)}
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};
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SkScalar weight = rand.nextRangeF(0.f, 2.f);
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for(int edgeType = 0; edgeType < kGrClipEdgeTypeCnt; ++edgeType) {
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sk_sp<GrGeometryProcessor> gp;
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GrClipEdgeType et = (GrClipEdgeType)edgeType;
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gp = GrConicEffect::Make(color, SkMatrix::I(), et, *context->contextPriv().caps(),
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SkMatrix::I(), false);
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if (!gp) {
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continue;
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}
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SkScalar x = col * w;
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SkScalar y = row * h;
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SkPoint controlPts[] = {
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{x + baseControlPts[0].fX, y + baseControlPts[0].fY},
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{x + baseControlPts[1].fX, y + baseControlPts[1].fY},
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{x + baseControlPts[2].fX, y + baseControlPts[2].fY}
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};
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SkConic dst[4];
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SkMatrix klm;
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int cnt = chop_conic(controlPts, dst, weight);
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GrPathUtils::getConicKLM(controlPts, weight, &klm);
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SkPaint ctrlPtPaint;
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ctrlPtPaint.setColor(rand.nextU() | 0xFF000000);
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for (int i = 0; i < 3; ++i) {
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canvas->drawCircle(controlPts[i], 6.f, ctrlPtPaint);
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}
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SkPaint polyPaint;
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polyPaint.setColor(0xffA0A0A0);
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polyPaint.setStrokeWidth(0);
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polyPaint.setStyle(SkPaint::kStroke_Style);
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canvas->drawPoints(SkCanvas::kPolygon_PointMode, 3, controlPts, polyPaint);
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SkPaint choppedPtPaint;
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choppedPtPaint.setColor(~ctrlPtPaint.getColor() | 0xFF000000);
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for (int c = 0; c < cnt; ++c) {
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SkPoint* pts = dst[c].fPts;
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for (int i = 0; i < 3; ++i) {
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canvas->drawCircle(pts[i], 3.f, choppedPtPaint);
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}
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SkRect bounds;
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//SkPoint bPts[] = {{0.f, 0.f}, {800.f, 800.f}};
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//bounds.set(bPts, 2);
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bounds.set(pts, 3);
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SkPaint boundsPaint;
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boundsPaint.setColor(0xff808080);
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boundsPaint.setStrokeWidth(0);
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boundsPaint.setStyle(SkPaint::kStroke_Style);
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canvas->drawRect(bounds, boundsPaint);
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std::unique_ptr<GrDrawOp> op = BezierConicTestOp::Make(context, gp, bounds,
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color, klm);
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renderTargetContext->priv().testingOnly_addDrawOp(std::move(op));
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}
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++col;
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if (numCols == col) {
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col = 0;
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++row;
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}
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}
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}
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}
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private:
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// Uses the max curvature function for quads to estimate
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// where to chop the conic. If the max curvature is not
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// found along the curve segment it will return 1 and
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// dst[0] is the original conic. If it returns 2 the dst[0]
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// and dst[1] are the two new conics.
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int split_conic(const SkPoint src[3], SkConic dst[2], const SkScalar weight) {
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SkScalar t = SkFindQuadMaxCurvature(src);
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if (t == 0 || t == 1) {
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if (dst) {
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dst[0].set(src, weight);
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}
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return 1;
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} else {
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if (dst) {
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SkConic conic;
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conic.set(src, weight);
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if (!conic.chopAt(t, dst)) {
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dst[0].set(src, weight);
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return 1;
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}
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}
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return 2;
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}
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}
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// Calls split_conic on the entire conic and then once more on each subsection.
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// Most cases will result in either 1 conic (chop point is not within t range)
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// or 3 points (split once and then one subsection is split again).
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int chop_conic(const SkPoint src[3], SkConic dst[4], const SkScalar weight) {
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SkConic dstTemp[2];
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int conicCnt = split_conic(src, dstTemp, weight);
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if (2 == conicCnt) {
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int conicCnt2 = split_conic(dstTemp[0].fPts, dst, dstTemp[0].fW);
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conicCnt = conicCnt2 + split_conic(dstTemp[1].fPts, &dst[conicCnt2], dstTemp[1].fW);
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} else {
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dst[0] = dstTemp[0];
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}
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return conicCnt;
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}
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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class BezierQuadTestOp : public BezierTestOp {
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public:
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DEFINE_OP_CLASS_ID
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const char* name() const override { return "BezierQuadTestOp"; }
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static std::unique_ptr<GrDrawOp> Make(GrContext* context,
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sk_sp<const GrGeometryProcessor> gp,
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const SkRect& rect,
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const SkPMColor4f& color,
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const GrPathUtils::QuadUVMatrix& devToUV) {
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GrOpMemoryPool* pool = context->contextPriv().opMemoryPool();
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return pool->allocate<BezierQuadTestOp>(std::move(gp), rect, color, devToUV);
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}
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private:
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friend class ::GrOpMemoryPool; // for ctor
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BezierQuadTestOp(sk_sp<const GrGeometryProcessor> gp, const SkRect& rect,
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const SkPMColor4f& color, const GrPathUtils::QuadUVMatrix& devToUV)
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: INHERITED(std::move(gp), rect, color, ClassID()), fDevToUV(devToUV) {}
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struct Vertex {
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SkPoint fPosition;
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float fKLM[4]; // The last value is ignored. The effect expects a vec4f.
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};
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void onPrepareDraws(Target* target) override {
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SkASSERT(this->gp()->vertexStride() == sizeof(Vertex));
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QuadHelper helper(target, sizeof(Vertex), 1);
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Vertex* verts = reinterpret_cast<Vertex*>(helper.vertices());
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if (!verts) {
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return;
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}
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SkRect rect = this->rect();
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SkPointPriv::SetRectTriStrip(&verts[0].fPosition, rect, sizeof(Vertex));
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fDevToUV.apply(verts, 4, sizeof(Vertex), sizeof(SkPoint));
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auto pipe = this->makePipeline(target);
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helper.recordDraw(target, this->gp(), pipe.fPipeline, pipe.fFixedDynamicState);
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}
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GrPathUtils::QuadUVMatrix fDevToUV;
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static constexpr int kVertsPerCubic = 4;
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static constexpr int kIndicesPerCubic = 6;
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typedef BezierTestOp INHERITED;
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};
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/**
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* This GM directly exercises effects that draw Bezier quad curves in the GPU backend.
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*/
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class BezierQuadEffects : public GM {
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public:
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BezierQuadEffects() {
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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("bezier_quad_effects");
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}
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SkISize onISize() override {
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return SkISize::Make(800, 800);
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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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struct Vertex {
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SkPoint fPosition;
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float fUV[4]; // The last two values are ignored. The effect expects a vec4f.
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};
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constexpr int kNumQuads = 5;
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SkRandom rand;
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int numCols = SkScalarCeilToInt(SkScalarSqrt(SkIntToScalar(kNumQuads*3)));
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int numRows = SkScalarCeilToInt(SkIntToScalar(kNumQuads*3) / numCols);
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SkScalar w = SkIntToScalar(renderTargetContext->width()) / numCols;
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SkScalar h = SkIntToScalar(renderTargetContext->height()) / numRows;
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int row = 0;
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int col = 0;
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SkPMColor4f color = SkPMColor4f::FromBytes_RGBA(0xff000000);
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for (int i = 0; i < kNumQuads; ++i) {
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SkPoint baseControlPts[] = {
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{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)},
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{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)},
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{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)}
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};
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for(int edgeType = 0; edgeType < kGrClipEdgeTypeCnt; ++edgeType) {
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sk_sp<GrGeometryProcessor> gp;
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GrClipEdgeType et = (GrClipEdgeType)edgeType;
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gp = GrQuadEffect::Make(color, SkMatrix::I(), et, *context->contextPriv().caps(),
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SkMatrix::I(), false);
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if (!gp) {
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continue;
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}
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SkScalar x = col * w;
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SkScalar y = row * h;
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SkPoint controlPts[] = {
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{x + baseControlPts[0].fX, y + baseControlPts[0].fY},
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{x + baseControlPts[1].fX, y + baseControlPts[1].fY},
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{x + baseControlPts[2].fX, y + baseControlPts[2].fY}
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};
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SkPoint chopped[5];
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int cnt = SkChopQuadAtMaxCurvature(controlPts, chopped);
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SkPaint ctrlPtPaint;
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ctrlPtPaint.setColor(rand.nextU() | 0xFF000000);
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for (int i = 0; i < 3; ++i) {
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canvas->drawCircle(controlPts[i], 6.f, ctrlPtPaint);
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}
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SkPaint polyPaint;
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polyPaint.setColor(0xffA0A0A0);
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polyPaint.setStrokeWidth(0);
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polyPaint.setStyle(SkPaint::kStroke_Style);
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canvas->drawPoints(SkCanvas::kPolygon_PointMode, 3, controlPts, polyPaint);
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SkPaint choppedPtPaint;
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choppedPtPaint.setColor(~ctrlPtPaint.getColor() | 0xFF000000);
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for (int c = 0; c < cnt; ++c) {
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SkPoint* pts = chopped + 2 * c;
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for (int i = 0; i < 3; ++i) {
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canvas->drawCircle(pts[i], 3.f, choppedPtPaint);
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}
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SkRect bounds;
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bounds.set(pts, 3);
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SkPaint boundsPaint;
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boundsPaint.setColor(0xff808080);
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boundsPaint.setStrokeWidth(0);
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boundsPaint.setStyle(SkPaint::kStroke_Style);
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canvas->drawRect(bounds, boundsPaint);
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GrPaint grPaint;
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grPaint.setXPFactory(GrPorterDuffXPFactory::Get(SkBlendMode::kSrc));
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GrPathUtils::QuadUVMatrix DevToUV(pts);
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std::unique_ptr<GrDrawOp> op = BezierQuadTestOp::Make(context, gp,
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bounds, color, DevToUV);
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renderTargetContext->priv().testingOnly_addDrawOp(std::move(op));
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}
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++col;
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if (numCols == col) {
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col = 0;
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++row;
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}
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}
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}
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}
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private:
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typedef GM INHERITED;
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};
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DEF_GM(return new BezierConicEffects;)
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DEF_GM(return new BezierQuadEffects;)
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}
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