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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 "SkView.h"
#include "SkCanvas.h"
#include "SkReadBuffer.h"
#include "SkWriteBuffer.h"
#include "SkGradientShader.h"
#include "SkPath.h"
#include "SkRegion.h"
#include "SkShader.h"
#include "SkUtils.h"
#include "SkColorPriv.h"
#include "SkColorFilter.h"
#include "SkStrokeRec.h"
#include "SkTypeface.h"
#include "SkGradientShader.h"
#include "SkLayerRasterizer.h"
#include "SkBlurMaskFilter.h"
#include "Sk2DPathEffect.h"
class Dot2DPathEffect : public Sk2DPathEffect {
public:
Dot2DPathEffect(SkScalar radius, const SkMatrix& matrix,
SkTDArray<SkPoint>* pts)
: Sk2DPathEffect(matrix), fRadius(radius), fPts(pts) {}
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(Dot2DPathEffect)
class Registrar {
public:
Registrar() {
SkFlattenable::Register("Dot2DPathEffect",
Dot2DPathEffect::CreateProc,
Dot2DPathEffect::GetFlattenableType());
}
};
protected:
void begin(const SkIRect& uvBounds, SkPath* dst) const override {
if (fPts) {
fPts->reset();
}
this->INHERITED::begin(uvBounds, dst);
}
virtual void next(const SkPoint& loc, int u, int v,
SkPath* dst) const override {
if (fPts) {
*fPts->append() = loc;
}
dst->addCircle(loc.fX, loc.fY, fRadius);
}
void flatten(SkWriteBuffer& buffer) const override {
buffer.writeMatrix(this->getMatrix());
buffer.writeScalar(fRadius);
}
private:
SkScalar fRadius;
SkTDArray<SkPoint>* fPts;
typedef Sk2DPathEffect INHERITED;
};
static Dot2DPathEffect::Registrar gReg0;
sk_sp<SkFlattenable> Dot2DPathEffect::CreateProc(SkReadBuffer& buffer) {
SkMatrix matrix;
buffer.readMatrix(&matrix);
return sk_make_sp<Dot2DPathEffect>(buffer.readScalar(), matrix, nullptr);
}
class InverseFillPE : public SkPathEffect {
public:
InverseFillPE() {}
virtual bool filterPath(SkPath* dst, const SkPath& src,
SkStrokeRec*, const SkRect*) const override {
*dst = src;
dst->setFillType(SkPath::kInverseWinding_FillType);
return true;
}
#ifndef SK_IGNORE_TO_STRING
void toString(SkString* str) const override {
str->appendf("InverseFillPE: ()");
}
#endif
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(InverseFillPE)
private:
typedef SkPathEffect INHERITED;
};
sk_sp<SkFlattenable> InverseFillPE::CreateProc(SkReadBuffer& buffer) {
return sk_make_sp<InverseFillPE>();
}
static sk_sp<SkPathEffect> makepe(float interp, SkTDArray<SkPoint>* pts) {
SkMatrix lattice;
SkScalar rad = 3 + SkIntToScalar(4) * (1 - interp);
lattice.setScale(rad*2, rad*2, 0, 0);
lattice.postSkew(SK_Scalar1/3, 0, 0, 0);
return sk_make_sp<Dot2DPathEffect>(rad, lattice, pts);
}
static void r7(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p, SkScalar interp) {
p.setPathEffect(makepe(SkScalarToFloat(interp), nullptr));
rastBuilder->addLayer(p);
#if 0
p.setPathEffect(new InverseFillPE())->unref();
p.setXfermodeMode(SkXfermode::kSrcIn_Mode);
p.setXfermodeMode(SkXfermode::kClear_Mode);
p.setAlpha((1 - interp) * 255);
rastBuilder->addLayer(p);
#endif
}
typedef void (*raster_proc)(SkLayerRasterizer*, SkPaint&);
static void apply_shader(SkPaint* paint, float scale) {
SkPaint p;
SkLayerRasterizer::Builder rastBuilder;
p.setAntiAlias(true);
r7(&rastBuilder, p, scale);
paint->setRasterizer(rastBuilder.detach());
paint->setColor(SK_ColorBLUE);
}
class ClockFaceView : public SkView {
sk_sp<SkTypeface> fFace;
SkScalar fInterp;
SkScalar fDx;
public:
ClockFaceView() {
fFace = SkTypeface::MakeFromFile("/Users/reed/Downloads/p052024l.pfb");
fInterp = 0;
fDx = SK_Scalar1/64;
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "Text Effects");
return true;
}
return this->INHERITED::onQuery(evt);
}
void drawBG(SkCanvas* canvas) {
// canvas->drawColor(0xFFDDDDDD);
canvas->drawColor(SK_ColorWHITE);
}
static void drawdots(SkCanvas* canvas, const SkPaint& orig) {
SkTDArray<SkPoint> pts;
auto pe = makepe(0, &pts);
SkStrokeRec rec(SkStrokeRec::kFill_InitStyle);
SkPath path, dstPath;
orig.getTextPath("9", 1, 0, 0, &path);
pe->filterPath(&dstPath, path, &rec, nullptr);
SkPaint p;
p.setAntiAlias(true);
p.setStrokeWidth(10);
p.setColor(SK_ColorRED);
canvas->drawPoints(SkCanvas::kPoints_PointMode, pts.count(), pts.begin(), p);
}
virtual void onDraw(SkCanvas* canvas) {
this->drawBG(canvas);
SkScalar x = SkIntToScalar(20);
SkScalar y = SkIntToScalar(300);
SkPaint paint;
paint.setAntiAlias(true);
paint.setTextSize(SkIntToScalar(240));
paint.setTypeface(SkTypeface::MakeFromName("sans-serif", SkFontStyle::Bold()));
SkString str("9");
paint.setTypeface(fFace);
apply_shader(&paint, SkScalarToFloat(fInterp));
canvas->drawString(str, x, y, paint);
// drawdots(canvas, paint);
if (false) {
fInterp += fDx;
if (fInterp > 1) {
fInterp = 1;
fDx = -fDx;
} else if (fInterp < 0) {
fInterp = 0;
fDx = -fDx;
}
this->inval(nullptr);
}
}
private:
typedef SkView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new ClockFaceView; }
static SkViewRegister reg(MyFactory);
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