| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColorPriv.h" |
| #include "include/core/SkPath.h" |
| #include "include/core/SkPathMeasure.h" |
| #include "include/core/SkRegion.h" |
| #include "include/core/SkShader.h" |
| #include "include/effects/Sk1DPathEffect.h" |
| #include "include/effects/SkCornerPathEffect.h" |
| #include "include/effects/SkGradientShader.h" |
| #include "include/utils/SkRandom.h" |
| #include "samplecode/Sample.h" |
| #include "src/utils/SkUTF.h" |
| #include "tools/timer/TimeUtils.h" |
| |
| #define CORNER_RADIUS 12 |
| |
| static const int gXY[] = { |
| 4, 0, 0, -4, 8, -4, 12, 0, 8, 4, 0, 4 |
| }; |
| |
| static sk_sp<SkPathEffect> make_pe(int flags, SkScalar phase) { |
| if (flags == 1) { |
| return SkCornerPathEffect::Make(SkIntToScalar(CORNER_RADIUS)); |
| } |
| |
| SkPath path; |
| path.moveTo(SkIntToScalar(gXY[0]), SkIntToScalar(gXY[1])); |
| for (unsigned i = 2; i < std::size(gXY); i += 2) |
| path.lineTo(SkIntToScalar(gXY[i]), SkIntToScalar(gXY[i+1])); |
| path.close(); |
| path.offset(SkIntToScalar(-6), 0); |
| |
| auto outer = SkPath1DPathEffect::Make(path, 12, phase, SkPath1DPathEffect::kRotate_Style); |
| |
| if (flags == 2) |
| return outer; |
| |
| auto inner = SkCornerPathEffect::Make(SkIntToScalar(CORNER_RADIUS)); |
| |
| return SkPathEffect::MakeCompose(outer, inner); |
| } |
| |
| static sk_sp<SkPathEffect> make_warp_pe(SkScalar phase) { |
| SkPath path; |
| path.moveTo(SkIntToScalar(gXY[0]), SkIntToScalar(gXY[1])); |
| for (unsigned i = 2; i < std::size(gXY); i += 2) { |
| path.lineTo(SkIntToScalar(gXY[i]), SkIntToScalar(gXY[i+1])); |
| } |
| path.close(); |
| path.offset(SkIntToScalar(-6), 0); |
| |
| auto outer = SkPath1DPathEffect::Make( |
| path, 12, phase, SkPath1DPathEffect::kMorph_Style); |
| auto inner = SkCornerPathEffect::Make(SkIntToScalar(CORNER_RADIUS)); |
| |
| return SkPathEffect::MakeCompose(outer, inner); |
| } |
| |
| /////////////////////////////////////////////////////////// |
| |
| #include "include/core/SkColorFilter.h" |
| |
| class PathEffectView : public Sample { |
| SkPath fPath; |
| SkPoint fClickPt; |
| SkScalar fPhase; |
| |
| public: |
| PathEffectView() : fPhase(0) { |
| } |
| |
| protected: |
| void onOnceBeforeDraw() override { |
| SkRandom rand; |
| int steps = 20; |
| SkScalar dist = SkIntToScalar(400); |
| SkScalar x = SkIntToScalar(20); |
| SkScalar y = SkIntToScalar(50); |
| |
| fPath.moveTo(x, y); |
| for (int i = 0; i < steps; i++) { |
| x += dist/steps; |
| SkScalar tmpY = y + SkIntToScalar(rand.nextS() % 25); |
| if (i == steps/2) { |
| fPath.moveTo(x, tmpY); |
| } else { |
| fPath.lineTo(x, tmpY); |
| } |
| } |
| |
| { |
| SkRect oval; |
| oval.setLTRB(20, 30, 100, 60); |
| oval.offset(x, 0); |
| fPath.addRoundRect(oval, SkIntToScalar(8), SkIntToScalar(8)); |
| } |
| |
| fClickPt.set(SkIntToScalar(200), SkIntToScalar(200)); |
| |
| this->setBGColor(0xFFDDDDDD); |
| } |
| |
| SkString name() override { return SkString("PathEffects"); } |
| |
| void onDrawContent(SkCanvas* canvas) override { |
| SkPaint paint; |
| |
| canvas->translate(0, 50); |
| |
| paint.setColor(SK_ColorBLUE); |
| paint.setPathEffect(make_pe(2, fPhase)); |
| canvas->drawPath(fPath, paint); |
| |
| canvas->translate(0, 50); |
| |
| paint.setARGB(0xFF, 0, 0xBB, 0); |
| paint.setPathEffect(make_pe(3, fPhase)); |
| canvas->drawPath(fPath, paint); |
| |
| canvas->translate(0, 50); |
| |
| paint.setARGB(0xFF, 0, 0, 0); |
| paint.setPathEffect(make_warp_pe(fPhase)); |
| canvas->drawPath(fPath, paint); |
| } |
| |
| bool onAnimate(double nanos) override { |
| fPhase = TimeUtils::Scaled(1e-9 * nanos, 40); |
| return true; |
| } |
| |
| private: |
| using INHERITED = Sample; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_SAMPLE( return new PathEffectView(); ) |