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/*
* 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 < SK_ARRAY_COUNT(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 < SK_ARRAY_COUNT(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:
typedef Sample INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_SAMPLE( return new PathEffectView(); )
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