154 lines
4.5 KiB
C++
154 lines
4.5 KiB
C++
/*
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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/gm.h"
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#include "include/core/SkBlendMode.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkMatrix.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkPath.h"
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#include "include/core/SkPoint.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkScalar.h"
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#include "include/core/SkSize.h"
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#include "include/core/SkString.h"
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#include "include/private/GrTypesPriv.h"
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#include "src/core/SkCanvasPriv.h"
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#include "src/gpu/GrFragmentProcessor.h"
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#include "src/gpu/GrPaint.h"
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#include "src/gpu/effects/GrConvexPolyEffect.h"
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#include "src/gpu/effects/GrPorterDuffXferProcessor.h"
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#include "src/gpu/v1/SurfaceDrawContext_v1.h"
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#include "tools/gpu/TestOps.h"
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#include <memory>
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#include <utility>
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class GrAppliedClip;
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namespace skiagm {
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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 GpuGM {
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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 { return SkISize::Make(720, 550); }
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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.push_back(tri);
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fPaths.emplace_back();
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fPaths.back().reverseAddPath(tri);
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tri.close();
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fPaths.push_back(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 = { SkScalarCos(angle), SkScalarSin(angle) };
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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.push_back(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.push_back(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.push_back(linePath);
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}
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DrawResult onDraw(GrRecordingContext* rContext, SkCanvas* canvas, SkString* errorMsg) override {
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auto sdc = SkCanvasPriv::TopDeviceSurfaceDrawContext(canvas);
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if (!sdc) {
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*errorMsg = kErrorMsg_DrawSkippedGpuOnly;
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return DrawResult::kSkip;
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}
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SkScalar y = 0;
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static constexpr SkScalar kDX = 12.f;
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static constexpr SkScalar kOutset = 5.f;
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for (const SkPath& path : fPaths) {
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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::Translate(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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auto [success, fp] = GrConvexPolyEffect::Make(/*inputFP=*/nullptr, edgeType, p);
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if (!success) {
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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.setCoverageFragmentProcessor(std::move(fp));
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auto rect = p.getBounds().makeOutset(kOutset, kOutset);
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auto op = sk_gpu_test::test_ops::MakeRect(rContext, std::move(grPaint), rect);
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sdc->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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return DrawResult::kOk;
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}
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private:
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std::vector<SkPath> fPaths;
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using INHERITED = GM;
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};
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DEF_GM(return new ConvexPolyEffect;)
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} // namespace skiagm
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