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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 "SampleCode.h"
#include "SkAnimTimer.h"
#include "SkView.h"
#include "SkCanvas.h"
#include "SkGradientShader.h"
#include "SkPath.h"
#include "SkRegion.h"
#include "SkShader.h"
#include "SkUtils.h"
#include "Sk1DPathEffect.h"
#include "SkCornerPathEffect.h"
#include "SkPathMeasure.h"
#include "SkRandom.h"
#include "SkColorPriv.h"
#include "SkPixelXorXfermode.h"
#define CORNER_RADIUS 12
static const int gXY[] = {
4, 0, 0, -4, 8, -4, 12, 0, 8, 4, 0, 4
};
static SkPathEffect* make_pe(int flags, SkScalar phase) {
if (flags == 1)
return SkCornerPathEffect::Create(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);
SkPathEffect* outer = SkPath1DPathEffect::Create(path, 12, phase,
SkPath1DPathEffect::kRotate_Style);
if (flags == 2)
return outer;
SkPathEffect* inner = SkCornerPathEffect::Create(SkIntToScalar(CORNER_RADIUS));
SkPathEffect* pe = SkComposePathEffect::Create(outer, inner);
outer->unref();
inner->unref();
return pe;
}
static 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);
SkPathEffect* outer = SkPath1DPathEffect::Create(
path, 12, phase, SkPath1DPathEffect::kMorph_Style);
SkPathEffect* inner = SkCornerPathEffect::Create(SkIntToScalar(CORNER_RADIUS));
SkPathEffect* pe = SkComposePathEffect::Create(outer, inner);
outer->unref();
inner->unref();
return pe;
}
///////////////////////////////////////////////////////////
#include "SkColorFilter.h"
#include "SkLayerRasterizer.h"
class TestRastBuilder : public SkLayerRasterizer::Builder {
public:
TestRastBuilder() {
SkPaint paint;
paint.setAntiAlias(true);
paint.setAlpha(0x66);
this->addLayer(paint, SkIntToScalar(4), SkIntToScalar(4));
paint.setAlpha(0xFF);
this->addLayer(paint);
}
};
class PathEffectView : public SampleView {
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.set(SkIntToScalar(20), SkIntToScalar(30),
SkIntToScalar(100), SkIntToScalar(60));
oval.offset(x, 0);
fPath.addRoundRect(oval, SkIntToScalar(8), SkIntToScalar(8));
}
fClickPt.set(SkIntToScalar(200), SkIntToScalar(200));
this->setBGColor(0xFFDDDDDD);
}
bool onQuery(SkEvent* evt) override {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "PathEffects");
return true;
}
return this->INHERITED::onQuery(evt);
}
void onDrawContent(SkCanvas* canvas) override {
SkPaint paint;
canvas->translate(0, 50);
paint.setColor(SK_ColorBLUE);
paint.setPathEffect(make_pe(2, fPhase))->unref();
canvas->drawPath(fPath, paint);
canvas->translate(0, 50);
paint.setARGB(0xFF, 0, 0xBB, 0);
paint.setPathEffect(make_pe(3, fPhase))->unref();
canvas->drawPath(fPath, paint);
canvas->translate(0, 50);
paint.setARGB(0xFF, 0, 0, 0);
paint.setPathEffect(make_warp_pe(fPhase))->unref();
TestRastBuilder testRastBuilder;
paint.setRasterizer(testRastBuilder.detachRasterizer())->unref();
canvas->drawPath(fPath, paint);
}
bool onAnimate(const SkAnimTimer& timer) override {
fPhase = timer.scaled(40);
return true;
}
private:
typedef SampleView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new PathEffectView; }
static SkViewRegister reg(MyFactory);
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