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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/SkBlurMaskFilter.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(SkPath::kInverseWinding_FillType);
- 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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