| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm/gm.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPathBuilder.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkSize.h" |
| #include "include/core/SkString.h" |
| #include "src/base/SkRandom.h" |
| |
| #define W 400 |
| #define H 400 |
| #define N 10 |
| |
| constexpr SkScalar SH = SkIntToScalar(H); |
| |
| static SkPath rnd_quad(SkPaint* paint, SkRandom& rand) { |
| auto a = rand.nextRangeScalar(0,W), |
| b = rand.nextRangeScalar(0,H); |
| |
| SkPathBuilder builder; |
| builder.moveTo(a, b); |
| for (int x = 0; x < 2; ++x) { |
| auto c = rand.nextRangeScalar(W/4, W), |
| d = rand.nextRangeScalar( 0, H), |
| e = rand.nextRangeScalar( 0, W), |
| f = rand.nextRangeScalar(H/4, H); |
| builder.quadTo(c,d,e,f); |
| } |
| paint->setColor(rand.nextU()); |
| SkScalar width = rand.nextRangeScalar(1, 5); |
| width *= width; |
| paint->setStrokeWidth(width); |
| paint->setAlphaf(1.0f); |
| return builder.detach(); |
| } |
| |
| static SkPath rnd_cubic(SkPaint* paint, SkRandom& rand) { |
| auto a = rand.nextRangeScalar(0,W), |
| b = rand.nextRangeScalar(0,H); |
| |
| SkPathBuilder builder; |
| builder.moveTo(a, b); |
| for (int x = 0; x < 2; ++x) { |
| auto c = rand.nextRangeScalar(W/4, W), |
| d = rand.nextRangeScalar( 0, H), |
| e = rand.nextRangeScalar( 0, W), |
| f = rand.nextRangeScalar(H/4, H), |
| g = rand.nextRangeScalar(W/4, W), |
| h = rand.nextRangeScalar(H/4, H); |
| builder.cubicTo(c,d,e,f,g,h); |
| } |
| paint->setColor(rand.nextU()); |
| SkScalar width = rand.nextRangeScalar(1, 5); |
| width *= width; |
| paint->setStrokeWidth(width); |
| paint->setAlphaf(1.0f); |
| return builder.detach(); |
| } |
| |
| class BeziersGM : public skiagm::GM { |
| public: |
| BeziersGM() {} |
| |
| protected: |
| |
| SkString onShortName() override { |
| return SkString("beziers"); |
| } |
| |
| SkISize onISize() override { |
| return SkISize::Make(W, H*2); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| SkPaint paint; |
| paint.setStyle(SkPaint::kStroke_Style); |
| paint.setStrokeWidth(SkIntToScalar(9)/2); |
| paint.setAntiAlias(true); |
| |
| SkRandom rand; |
| for (int i = 0; i < N; i++) { |
| canvas->drawPath(rnd_quad(&paint, rand), paint); |
| } |
| canvas->translate(0, SH); |
| for (int i = 0; i < N; i++) { |
| canvas->drawPath(rnd_cubic(&paint, rand), paint); |
| } |
| } |
| |
| private: |
| using INHERITED = skiagm::GM; |
| }; |
| |
| DEF_GM( return new BeziersGM; ) |