C++ SkPath::offset方法代码示例

static void textonpath_slide(SkCanvas* canvas) {
    const char* text = "Displacement";
    size_t len =strlen(text);
    SkPath path;
    path.moveTo(100, 300);
    path.quadTo(300, 100, 500, 300);
    path.offset(0, -100);

    SkPaint paint;
    paint.setAntiAlias(true);
    paint.setTextSize(40);

    paint.setStyle(SkPaint::kStroke_Style);
    canvas->drawPath(path, paint);
    paint.setStyle(SkPaint::kFill_Style);

    SkScalar x = 50;
    paint.setColor(0xFF008800);
    canvas->drawTextOnPathHV(text, len, path,
                             x, paint.getTextSize()*2/3, paint);
    paint.setColor(SK_ColorRED);
    canvas->drawTextOnPathHV(text, len, path,
                             x + 60, 0, paint);
    paint.setColor(SK_ColorBLUE);
    canvas->drawTextOnPathHV(text, len, path,
                             x + 120, -paint.getTextSize()*2/3, paint);

    path.offset(0, 200);
    paint.setTextAlign(SkPaint::kRight_Align);

    text = "Matrices";
    len = strlen(text);
    SkScalar pathLen = getpathlen(path);
    SkMatrix matrix;

    paint.setColor(SK_ColorBLACK);
    paint.setStyle(SkPaint::kStroke_Style);
    canvas->drawPath(path, paint);
    paint.setStyle(SkPaint::kFill_Style);

    paint.setTextSize(50);
    canvas->drawTextOnPath(text, len, path, NULL, paint);

    paint.setColor(SK_ColorRED);
    matrix.setScale(-SK_Scalar1, SK_Scalar1);
    matrix.postTranslate(pathLen, 0);
    canvas->drawTextOnPath(text, len, path, &matrix, paint);

    paint.setColor(SK_ColorBLUE);
    matrix.setScale(SK_Scalar1, -SK_Scalar1);
    canvas->drawTextOnPath(text, len, path, &matrix, paint);

    paint.setColor(0xFF008800);
    matrix.setScale(-SK_Scalar1, -SK_Scalar1);
    matrix.postTranslate(pathLen, 0);
    canvas->drawTextOnPath(text, len, path, &matrix, paint);
}

    void onDrawContent(SkCanvas* canvas) override {
        test_huge_stroke(canvas); return;
        canvas->translate(SkIntToScalar(10), SkIntToScalar(10));

        SkPaint paint;
        paint.setAntiAlias(true);

        if (true) {
            canvas->drawColor(SK_ColorBLACK);

            paint.setTextSize(24);
            paint.setColor(SK_ColorWHITE);
            canvas->translate(10, 30);

            static const SkBlurStyle gStyle[] = {
                kNormal_SkBlurStyle,
                kInner_SkBlurStyle,
                kOuter_SkBlurStyle,
                kSolid_SkBlurStyle,
            };
            for (int x = 0; x < 5; x++) {
                SkScalar sigma = SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(4));
                for (int y = 0; y < 10; y++) {
                    if (x) {
                        paint.setMaskFilter(SkBlurMaskFilter::Make(gStyle[x - 1], sigma));
                    }
                    canvas->drawString("Title Bar", x*SkIntToScalar(100), y*SkIntToScalar(30), paint);
                    sigma *= 0.75f;
                }

            }
            return;
        }

        paint.setColor(SK_ColorBLUE);

#if 1
        SkPath p;
        float r = rand.nextUScalar1() + 0.5f;
        SkScalar x = 0, y = 0;
        p.moveTo(x, y);
#if 0
        p.cubicTo(x-75*r, y+75*r, x-40*r, y+125*r, x, y+85*r);
        p.cubicTo(x+40*r, y+125*r, x+75*r, y+75*r, x, y);
#else
        p.cubicTo(x+75*r, y+75*r, x+40*r, y+125*r, x, y+85*r);
        p.cubicTo(x-40*r, y+125*r, x-75*r, y+75*r, x, y);
#endif
        p.close();
        fPath = p;
        fPath.offset(100, 0);
#endif

        fPath.setFillType(SkPath::kWinding_FillType);
        drawSet(canvas, &paint);

        canvas->translate(0, fPath.getBounds().height() * 5 / 4);
        fPath.setFillType(SkPath::kEvenOdd_FillType);
        drawSet(canvas, &paint);
    }

static void lettersToBitmap2(SkBitmap* dst, const char chars[],
                            const SkPaint& original, SkBitmap::Config config) {
    SkPath path;
    SkScalar x = 0;
    SkScalar width;
    SkPath p;
    for (size_t i = 0; i < strlen(chars); i++) {
        original.getTextPath(&chars[i], 1, x, 0, &p);
        path.addPath(p);
        original.getTextWidths(&chars[i], 1, &width);
        x += width;
    }
    SkRect bounds = path.getBounds();
    SkScalar sw = -original.getStrokeWidth();
    bounds.inset(sw, sw);
    path.offset(-bounds.fLeft, -bounds.fTop);
    bounds.offset(-bounds.fLeft, -bounds.fTop);

    int w = SkScalarRound(bounds.width());
    int h = SkScalarRound(bounds.height());
    SkPaint paint(original);

    paint.setAntiAlias(true);
    paint.setXfermodeMode(SkXfermode::kDstATop_Mode);
    paint.setColor(original.getColor());
    paint.setStyle(SkPaint::kStroke_Style);

    dst->setConfig(config, w, h);
    dst->allocPixels();
    dst->eraseColor(SK_ColorWHITE);

    SkCanvas canvas(*dst);
    canvas.drawPath(path, paint);
}

    virtual void onDraw(SkCanvas* canvas) {
        if (false) test_rev(canvas); // avoid bit rot, suppress warning
        SkRect r = { 10, 10, 100, 60 };

        SkPath path;

        path.addRect(r); test_rev(canvas, path);

        canvas->translate(0, 100);
        path.offset(20, 20);
        path.addRect(r); test_rev(canvas, path);

        canvas->translate(0, 100);
        path.reset();
        path.moveTo(10, 10); path.lineTo(30, 30);
        path.addOval(r);
        r.offset(50, 20);
        path.addOval(r);
        test_rev(canvas, path);

        SkPaint paint;
        paint.setTextSize(SkIntToScalar(100));
        SkTypeface* hira = SkTypeface::CreateFromName("Hiragino Maru Gothic Pro", SkTypeface::kNormal);
        SkSafeUnref(paint.setTypeface(hira));
        path.reset();
        paint.getTextPath("e", 1, 50, 50, &path);
        canvas->translate(0, 100);
        test_rev(canvas, path);
    }

    void onDraw(SkCanvas* canvas) override {
        SkPath path;
        SkRandom rand;

        int scale = 300;
        for (int i = 0; i < 4; ++i) {
            // get the random values deterministically
            SkScalar randoms[12];
            for (int index = 0; index < (int) SK_ARRAY_COUNT(randoms); ++index) {
                randoms[index] = rand.nextUScalar1();
            }
            path.lineTo(randoms[0] * scale, randoms[1] * scale);
            path.quadTo(randoms[2] * scale, randoms[3] * scale,
                        randoms[4] * scale, randoms[5] * scale);
            path.cubicTo(randoms[6] * scale, randoms[7] * scale,
                         randoms[8] * scale, randoms[9] * scale,
                         randoms[10] * scale, randoms[11] * scale);
        }

        path.setFillType(SkPath::kEvenOdd_FillType);
        path.offset(SkIntToScalar(20), SkIntToScalar(20));

        test_hittest(canvas, path);

        canvas->translate(SkIntToScalar(scale), 0);
        path.setFillType(SkPath::kWinding_FillType);

        test_hittest(canvas, path);
    }

SkPath create_convex_path(const SkPoint& offset) {
    SkPath convexPath;
    convexPath.moveTo(kMin, kMin);
    convexPath.lineTo(kMax, kMax);
    convexPath.lineTo(kMin, kMax);
    convexPath.close();
    convexPath.offset(offset.fX, offset.fY);
    return convexPath;
}

    TextOnPathView() {
        SkRect r;
        r.set(SkIntToScalar(100), SkIntToScalar(100),
              SkIntToScalar(300), SkIntToScalar(300));
        fPath.addOval(r);
        fPath.offset(SkIntToScalar(-50), SkIntToScalar(-50));

        fHOffset = SkIntToScalar(50);
    }

static void one_d_pe(SkPaint* paint) {
    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);
    scale(&path, 1.5f);

    paint->setPathEffect(SkPath1DPathEffect::Create(path, SkIntToScalar(21), 0,
                                                    SkPath1DPathEffect::kRotate_Style))->unref();
    compose_pe(paint);
}

static sk_sp<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);

    auto outer = SkPath1DPathEffect::Make(
        path, 12, phase, SkPath1DPathEffect::kMorph_Style);
    auto inner = SkCornerPathEffect::Make(SkIntToScalar(CORNER_RADIUS));

    return SkComposePathEffect::Make(outer, inner);
}

SkPath create_concave_path(const SkPoint& offset) {
    SkPath concavePath;
    concavePath.moveTo(kMin, kMin);
    concavePath.lineTo(kMid, 105.0f);
    concavePath.lineTo(kMax, kMin);
    concavePath.lineTo(295.0f, kMid);
    concavePath.lineTo(kMax, kMax);
    concavePath.lineTo(kMid, 295.0f);
    concavePath.lineTo(kMin, kMax);
    concavePath.lineTo(105.0f, kMid);
    concavePath.close();

    concavePath.offset(offset.fX, offset.fY);
    return concavePath;
}

void draw(SkCanvas* canvas) {
    SkPaint paint;
    paint.setAntiAlias(true);
    paint.setStyle(SkPaint::kStroke_Style);
    SkPath path;
    path.moveTo(0, -10);
    for (int i = 0; i < 128; i += 16) {
        SkScalar c = i * 0.5f;
        path.cubicTo( 10 + c, -10 - i,  10 + i, -10 - c,  10 + i,       0);
        path.cubicTo( 14 + i,  14 + c,  14 + c,  14 + i,       0,  14 + i);
        path.cubicTo(-18 - c,  18 + i, -18 - i,  18 + c, -18 - i,       0);
        path.cubicTo(-22 - i, -22 - c, -22 - c, -22 - i,       0, -22 - i);
    }
    path.offset(128, 128);
    canvas->drawPath(path, paint);
}

    void onDraw(SkCanvas* canvas) override {
        canvas->translate(8.5f, 8.5f);

        const SkRect rect = { 0, 0, 80, 80 };
        const SkScalar RAD = rect.width()/8;

        int i = 0;
        for (int insetFirst = 0; insetFirst <= 1; ++insetFirst) {
            for (int doEvenOdd = 0; doEvenOdd <= 1; ++doEvenOdd) {
                for (int outerRR = 0; outerRR <= 1; ++outerRR) {
                    for (int innerRR = 0; innerRR <= 1; ++innerRR) {
                        for (int outerCW = 0; outerCW <= 1; ++outerCW) {
                            for (int innerCW = 0; innerCW <= 1; ++innerCW) {
                                SkPath path;
                                path.setFillType(doEvenOdd ? SkPath::kEvenOdd_FillType : SkPath::kWinding_FillType);
                                SkPath::Direction outerDir = outerCW ? SkPath::kCW_Direction : SkPath::kCCW_Direction;
                                SkPath::Direction innerDir = innerCW ? SkPath::kCW_Direction : SkPath::kCCW_Direction;

                                SkRect r = insetFirst ? inset(rect) : rect;
                                if (outerRR) {
                                    path.addRoundRect(r, RAD, RAD, outerDir);
                                } else {
                                    path.addRect(r, outerDir);
                                }
                                r = insetFirst ? rect : inset(rect);
                                if (innerRR) {
                                    path.addRoundRect(r, RAD, RAD, innerDir);
                                } else {
                                    path.addRect(r, innerDir);
                                }

                                SkScalar dx = (i / 8) * rect.width() * 6 / 5;
                                SkScalar dy = (i % 8) * rect.height() * 6 / 5;
                                i++;
                                path.offset(dx, dy);

                                this->show(canvas, path);
                            }
                        }
                    }
                }
            }
        }
    }

    virtual void onDrawContent(SkCanvas* canvas) {
#if 1
        SkAAClip aaclip;
        SkPath path;
        SkRect bounds;

        bounds.set(0, 0, 20, 20);
        bounds.inset(SK_ScalarHalf, SK_ScalarHalf);

//        path.addRect(bounds);
//        path.addOval(bounds);
        path.addRoundRect(bounds, 4, 4);
        aaclip.setPath(path);
        canvas->translate(30, 30);
        drawClip(canvas, aaclip);

        SkAAClip aaclip2;
        path.offset(10, 10);
        aaclip2.setPath(path);
        canvas->translate(30, 0);
        drawClip(canvas, aaclip2);

        SkAAClip aaclip3;
        aaclip3.op(aaclip, aaclip2, SkRegion::kIntersect_Op);
        canvas->translate(30, 0);
        drawClip(canvas, aaclip3);

#endif

#if 0
        SkRect r;
        r.set(0, 0, this->width(), this->height());
        r.inset(20, 20);
        canvas->clipRect(r);

        SkPath path;
        path.addRect(r);
        SkPaint paint;
        paint.setAntiAlias(true);
        paint.setColor(SK_ColorRED);
        canvas->drawPath(path, paint);
#endif
    }

	StrokePathView() {
//        test_blur();
        fWidth = SkIntToScalar(120);

#if 0
        const char str[] =
            "M 0, 3"
            "C 10, -10, 30, -10, 0, 28"
            "C -30, -10, -10, -10, 0, 3"
            "Z";
        SkParsePath::FromSVGString(str, &fPath);
#else
        fPath.addCircle(0, 0, SkIntToScalar(50), SkPath::kCW_Direction);
        fPath.addCircle(0, SkIntToScalar(-50), SkIntToScalar(30), SkPath::kCW_Direction);
#endif
        
        scale_to_width(&fPath, fWidth);
        const SkRect& bounds = fPath.getBounds();
        fPath.offset(-bounds.fLeft, -bounds.fTop);
    }

    void onOnceBeforeDraw() override {
//        test_blur();
        fWidth = SkIntToScalar(120);

#if 0
        const char str[] =
            "M 0, 3"
            "C 10, -10, 30, -10, 0, 28"
            "C -30, -10, -10, -10, 0, 3"
            "Z";
        SkParsePath::FromSVGString(str, &fPath);
#else
        fPath.addCircle(0, 0, SkIntToScalar(50), SkPath::kCW_Direction);
        fPath.addCircle(0, SkIntToScalar(-50), SkIntToScalar(30), SkPath::kCW_Direction);
#endif

        scale_to_width(&fPath, fWidth);
        const SkRect& bounds = fPath.getBounds();
        fPath.offset(-bounds.fLeft, -bounds.fTop);

        this->setBGColor(0xFFDDDDDD);
    }