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#include "SampleCode.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"
static void test_grow(SkPath* path)
{
for (int i = 0; i < 100000; i++)
{
path->lineTo(i, i);
path->lineTo(i, i*2);
}
}
#define CORNER_RADIUS 12
static SkScalar gPhase;
static const int gXY[] = {
4, 0, 0, -4, 8, -4, 12, 0, 8, 4, 0, 4
};
static SkPathEffect* make_pe(int flags)
{
if (flags == 1)
return new SkCornerPathEffect(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 = new SkPath1DPathEffect(path, SkIntToScalar(12), gPhase, SkPath1DPathEffect::kRotate_Style);
if (flags == 2)
return outer;
SkPathEffect* inner = new SkCornerPathEffect(SkIntToScalar(CORNER_RADIUS));
SkPathEffect* pe = new SkComposePathEffect(outer, inner);
outer->unref();
inner->unref();
return pe;
}
static SkPathEffect* make_warp_pe()
{
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 = new SkPath1DPathEffect(path, SkIntToScalar(12), gPhase, SkPath1DPathEffect::kMorph_Style);
SkPathEffect* inner = new SkCornerPathEffect(SkIntToScalar(CORNER_RADIUS));
SkPathEffect* pe = new SkComposePathEffect(outer, inner);
outer->unref();
inner->unref();
return pe;
}
///////////////////////////////////////////////////////////
#include "SkColorFilter.h"
#include "SkPorterDuff.h"
#include "SkLayerRasterizer.h"
class testrast : public SkLayerRasterizer {
public:
testrast()
{
SkPaint paint;
paint.setAntiAlias(true);
#if 0
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(SK_Scalar1*4);
this->addLayer(paint);
paint.setStrokeWidth(SK_Scalar1*1);
paint.setPorterDuffXfermode(SkPorterDuff::kClear_Mode);
this->addLayer(paint);
#else
paint.setAlpha(0x66);
this->addLayer(paint, SkIntToScalar(4), SkIntToScalar(4));
paint.setAlpha(0xFF);
this->addLayer(paint);
#endif
}
};
class PathEffectView : public SkView {
SkPath fPath;
SkPoint fClickPt;
public:
PathEffectView()
{
SkRandom rand;
int steps = 20;
SkScalar dist = SkIntToScalar(500);
SkScalar x = SkIntToScalar(20);
SkScalar y = SkIntToScalar(50);
fPath.moveTo(x, y);
for (int i = 0; i < steps; i++)
{
x += dist/steps;
fPath.lineTo(x, y + SkIntToScalar(rand.nextS() % 25));
}
fClickPt.set(SkIntToScalar(200), SkIntToScalar(200));
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt)
{
if (SampleCode::TitleQ(*evt))
{
SampleCode::TitleR(evt, "PathEffects");
return true;
}
return this->INHERITED::onQuery(evt);
}
void drawBG(SkCanvas* canvas)
{
canvas->drawColor(0xFFDDDDDD);
#if 0
SkPath path;
test_grow(&path);
SkPaint p;
p.setAntiAlias(true);
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(SK_Scalar1);
canvas->drawPath(path, p);
path.close();
#endif
}
virtual void onDraw(SkCanvas* canvas)
{
this->drawBG(canvas);
if (true)
{
canvas->drawColor(SK_ColorWHITE);
SkPixelXorXfermode mode(SK_ColorWHITE);
SkPaint paint;
paint.setColor(SK_ColorRED);
paint.setXfermode(&mode);
paint.setStrokeWidth(SkIntToScalar(8));
canvas->drawLine(SkIntToScalar(100), SkIntToScalar(100),
SkIntToScalar(200), SkIntToScalar(200), paint);
canvas->drawLine(SkIntToScalar(100), SkIntToScalar(200),
SkIntToScalar(200), SkIntToScalar(100), paint);
// return;
}
if (false)
{
SkPath path;
SkPoint pts[] = { SkIntToScalar(100), SkIntToScalar(100),
SkIntToScalar(200), SkIntToScalar(100),
SkIntToScalar(100), SkIntToScalar(200)
};
SkPaint paint;
pts[2] = fClickPt;
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(SkIntToScalar(5));
path.moveTo(pts[0]);
path.arcTo(pts[1], pts[2], SkIntToScalar(50));
canvas->drawPath(path, paint);
paint.setStrokeWidth(0);
paint.setColor(SK_ColorRED);
canvas->drawLine(pts[0].fX, pts[0].fY, pts[1].fX, pts[1].fY, paint);
canvas->drawLine(pts[1].fX, pts[1].fY, pts[2].fX, pts[2].fY, paint);
return;
}
gPhase -= SK_Scalar1;
this->inval(NULL);
SkPaint paint;
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(SkIntToScalar(5));
canvas->drawPath(fPath, paint);
paint.setStrokeWidth(0);
paint.setColor(SK_ColorRED);
paint.setPathEffect(make_pe(1))->unref();
canvas->drawPath(fPath, paint);
canvas->translate(0, SkIntToScalar(50));
paint.setColor(SK_ColorBLUE);
paint.setPathEffect(make_pe(2))->unref();
canvas->drawPath(fPath, paint);
canvas->translate(0, SkIntToScalar(50));
paint.setARGB(0xFF, 0, 0xBB, 0);
paint.setPathEffect(make_pe(3))->unref();
canvas->drawPath(fPath, paint);
canvas->translate(0, SkIntToScalar(50));
paint.setARGB(0xFF, 0, 0, 0);
paint.setPathEffect(make_warp_pe())->unref();
paint.setRasterizer(new testrast)->unref();
canvas->drawPath(fPath, paint);
{
SkRect oval;
oval.set(SkIntToScalar(50), SkIntToScalar(100),
SkIntToScalar(150), SkIntToScalar(150));
canvas->drawRoundRect(oval, SkIntToScalar(8), SkIntToScalar(8), paint);
}
{
SkRect bounds;
SkPaint paint;
paint.setAntiAlias(true);
paint.setAlpha(0x80);
paint.setColorFilter(
SkColorFilter::CreateModeFilter(
SkColorSetARGB(0x44, 0, 0xFF, 0), SkXfermode::kSrcATop_Mode))->unref();
bounds.set(SkIntToScalar(10), SkIntToScalar(10), SkIntToScalar(150), SkIntToScalar(70));
canvas->saveLayer(&bounds, &paint,
(SkCanvas::SaveFlags)(SkCanvas::kHasAlphaLayer_SaveFlag | SkCanvas::kFullColorLayer_SaveFlag));
paint.setColorFilter(NULL);
paint.setColor(SK_ColorRED);
canvas->drawOval(bounds, paint);
paint.setColor(SK_ColorBLUE);
paint.setAlpha(0x80);
bounds.inset(SkIntToScalar(10), SkIntToScalar(10));
canvas->drawOval(bounds, paint);
canvas->restore();
}
}
private:
typedef SkView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new PathEffectView; }
static SkViewRegister reg(MyFactory);
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