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/*
* 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.h"
#include "SkPath.h"
#include "SkRandom.h"
#define W 400
#define H 400
#define N 10
constexpr SkScalar SH = SkIntToScalar(H);
static void rnd_quad(SkPath* p, SkPaint* paint, SkRandom& rand) {
auto a = rand.nextRangeScalar(0,W),
b = rand.nextRangeScalar(0,H);
p->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);
p->quadTo(c,d,e,f);
}
paint->setColor(rand.nextU());
SkScalar width = rand.nextRangeScalar(1, 5);
width *= width;
paint->setStrokeWidth(width);
paint->setAlpha(0xFF);
}
static void rnd_cubic(SkPath* p, SkPaint* paint, SkRandom& rand) {
auto a = rand.nextRangeScalar(0,W),
b = rand.nextRangeScalar(0,H);
p->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);
p->cubicTo(c,d,e,f,g,h);
}
paint->setColor(rand.nextU());
SkScalar width = rand.nextRangeScalar(1, 5);
width *= width;
paint->setStrokeWidth(width);
paint->setAlpha(0xFF);
}
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++) {
SkPath p;
rnd_quad(&p, &paint, rand);
canvas->drawPath(p, paint);
}
canvas->translate(0, SH);
for (int i = 0; i < N; i++) {
SkPath p;
rnd_cubic(&p, &paint, rand);
canvas->drawPath(p, paint);
}
}
private:
typedef skiagm::GM INHERITED;
};
DEF_GM( return new BeziersGM; )
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