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95 lines
2.4 KiB
95 lines
2.4 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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#include "gm.h"
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#include "SkPath.h"
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#include "SkRandom.h"
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#define W 400
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#define H 400
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#define N 10
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constexpr SkScalar SH = SkIntToScalar(H);
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static void rnd_quad(SkPath* p, SkPaint* paint, SkRandom& rand) {
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auto a = rand.nextRangeScalar(0,W),
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b = rand.nextRangeScalar(0,H);
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p->moveTo(a,b);
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for (int x = 0; x < 2; ++x) {
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auto c = rand.nextRangeScalar(W/4, W),
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d = rand.nextRangeScalar( 0, H),
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e = rand.nextRangeScalar( 0, W),
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f = rand.nextRangeScalar(H/4, H);
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p->quadTo(c,d,e,f);
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}
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paint->setColor(rand.nextU());
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SkScalar width = rand.nextRangeScalar(1, 5);
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width *= width;
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paint->setStrokeWidth(width);
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paint->setAlpha(0xFF);
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}
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static void rnd_cubic(SkPath* p, SkPaint* paint, SkRandom& rand) {
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auto a = rand.nextRangeScalar(0,W),
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b = rand.nextRangeScalar(0,H);
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p->moveTo(a,b);
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for (int x = 0; x < 2; ++x) {
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auto c = rand.nextRangeScalar(W/4, W),
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d = rand.nextRangeScalar( 0, H),
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e = rand.nextRangeScalar( 0, W),
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f = rand.nextRangeScalar(H/4, H),
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g = rand.nextRangeScalar(W/4, W),
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h = rand.nextRangeScalar(H/4, H);
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p->cubicTo(c,d,e,f,g,h);
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}
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paint->setColor(rand.nextU());
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SkScalar width = rand.nextRangeScalar(1, 5);
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width *= width;
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paint->setStrokeWidth(width);
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paint->setAlpha(0xFF);
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}
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class BeziersGM : public skiagm::GM {
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public:
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BeziersGM() {}
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protected:
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SkString onShortName() override {
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return SkString("beziers");
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}
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SkISize onISize() override {
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return SkISize::Make(W, H*2);
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}
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void onDraw(SkCanvas* canvas) override {
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SkPaint paint;
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paint.setStyle(SkPaint::kStroke_Style);
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paint.setStrokeWidth(SkIntToScalar(9)/2);
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paint.setAntiAlias(true);
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SkRandom rand;
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for (int i = 0; i < N; i++) {
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SkPath p;
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rnd_quad(&p, &paint, rand);
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canvas->drawPath(p, paint);
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}
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canvas->translate(0, SH);
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for (int i = 0; i < N; i++) {
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SkPath p;
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rnd_cubic(&p, &paint, rand);
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canvas->drawPath(p, paint);
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}
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}
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private:
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typedef skiagm::GM INHERITED;
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};
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DEF_GM( return new BeziersGM; )
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