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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/SkColorFilter.h"
#include "include/core/SkColorPriv.h"
#include "include/core/SkPath.h"
#include "include/core/SkRegion.h"
#include "include/core/SkShader.h"
#include "include/core/SkStrokeRec.h"
#include "include/core/SkTypeface.h"
#include "include/effects/SkGradientShader.h"
#include "include/utils/SkTextUtils.h"
#include "samplecode/Sample.h"
#include "src/core/SkReadBuffer.h"
#include "src/core/SkWriteBuffer.h"
#include "src/utils/SkUTF.h"
#include "include/effects/SkGradientShader.h"
#include "include/effects/Sk2DPathEffect.h"
class Dot2DPathEffect : public Sk2DPathEffect {
public:
Dot2DPathEffect(SkScalar radius, const SkMatrix& matrix,
SkTDArray<SkPoint>* pts)
: Sk2DPathEffect(matrix), fRadius(radius), fPts(pts) {}
SK_FLATTENABLE_HOOKS(Dot2DPathEffect)
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;
};
// Register this path effect as deserializable before main().
namespace {
static struct Initializer {
Initializer() {
SK_REGISTER_FLATTENABLE(Dot2DPathEffect);
}
} initializer;
}
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 onFilterPath(SkPath* dst, const SkPath& src,
SkStrokeRec*, const SkRect*) const override {
*dst = src;
dst->setFillType(SkPathFillType::kInverseWinding);
return true;
}
private:
SK_FLATTENABLE_HOOKS(InverseFillPE)
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);
}
class TextEffectsView : public Sample {
sk_sp<SkTypeface> fFace;
SkScalar fInterp;
SkScalar fDx;
public:
TextEffectsView() {
fFace = SkTypeface::MakeFromFile("/Users/reed/Downloads/p052024l.pfb");
fInterp = 0;
fDx = SK_Scalar1/64;
}
protected:
SkString name() override { return SkString("Text Effects"); }
void drawBG(SkCanvas* canvas) {
canvas->drawColor(SK_ColorWHITE);
}
void drawdots(SkCanvas* canvas, SkString s, SkScalar x, SkScalar y, const SkFont& font) {
SkTDArray<SkPoint> pts;
auto pe = makepe(fInterp, &pts);
SkStrokeRec rec(SkStrokeRec::kFill_InitStyle);
SkPath path, dstPath;
SkTextUtils::GetPath(s.c_str(), s.size(), SkTextEncoding::kUTF8, x, y, font, &path);
pe->filterPath(&dstPath, path, &rec, nullptr);
SkPaint paint;
paint.setAntiAlias(true);
paint.setStrokeWidth(10);
paint.setColor(SK_ColorRED);
canvas->drawPoints(SkCanvas::kPoints_PointMode, pts.count(), pts.begin(), paint);
}
void onDrawContent(SkCanvas* canvas) override {
this->drawBG(canvas);
SkScalar x = SkIntToScalar(20);
SkScalar y = SkIntToScalar(300);
SkFont font(SkTypeface::MakeFromName("sans-serif", SkFontStyle::Bold()), 240);
SkString str("9");
canvas->drawString(str, x, y, font, SkPaint());
drawdots(canvas, str, x, y, font);
if (false) {
fInterp += fDx;
if (fInterp > 1) {
fInterp = 1;
fDx = -fDx;
} else if (fInterp < 0) {
fInterp = 0;
fDx = -fDx;
}
}
}
private:
typedef Sample INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_SAMPLE( return new TextEffectsView(); )
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