C++ SkRect::inset方法代码示例

static void convolve_gaussian(GrDrawContext* drawContext,
                              GrRenderTarget* rt,
                              const GrClip& clip,
                              const SkRect& srcRect,
                              const SkRect& dstRect,
                              GrTexture* texture,
                              Gr1DKernelEffect::Direction direction,
                              int radius,
                              float sigma,
                              bool cropToSrcRect) {
    float bounds[2] = { 0.0f, 1.0f };
    if (!cropToSrcRect) {
        convolve_gaussian_1d(drawContext, rt, clip, srcRect, dstRect, texture,
                             direction, radius, sigma, false, bounds);
        return;
    }
    SkRect lowerSrcRect = srcRect, lowerDstRect = dstRect;
    SkRect middleSrcRect = srcRect, middleDstRect = dstRect;
    SkRect upperSrcRect = srcRect, upperDstRect = dstRect;
    SkScalar size;
    SkScalar rad = SkIntToScalar(radius);
    if (direction == Gr1DKernelEffect::kX_Direction) {
        bounds[0] = SkScalarToFloat(srcRect.left()) / texture->width();
        bounds[1] = SkScalarToFloat(srcRect.right()) / texture->width();
        size = srcRect.width();
        lowerSrcRect.fRight = srcRect.left() + rad;
        lowerDstRect.fRight = dstRect.left() + rad;
        upperSrcRect.fLeft = srcRect.right() - rad;
        upperDstRect.fLeft = dstRect.right() - rad;
        middleSrcRect.inset(rad, 0);
        middleDstRect.inset(rad, 0);
    } else {
        bounds[0] = SkScalarToFloat(srcRect.top()) / texture->height();
        bounds[1] = SkScalarToFloat(srcRect.bottom()) / texture->height();
        size = srcRect.height();
        lowerSrcRect.fBottom = srcRect.top() + rad;
        lowerDstRect.fBottom = dstRect.top() + rad;
        upperSrcRect.fTop = srcRect.bottom() - rad;
        upperDstRect.fTop = dstRect.bottom() - rad;
        middleSrcRect.inset(0, rad);
        middleDstRect.inset(0, rad);
    }
    if (radius >= size * SK_ScalarHalf) {
        // Blur radius covers srcRect; use bounds over entire draw
        convolve_gaussian_1d(drawContext, rt, clip, srcRect, dstRect, texture,
                            direction, radius, sigma, true, bounds);
    } else {
        // Draw upper and lower margins with bounds; middle without.
        convolve_gaussian_1d(drawContext, rt, clip, lowerSrcRect, lowerDstRect, texture,
                             direction, radius, sigma, true, bounds);
        convolve_gaussian_1d(drawContext, rt, clip, upperSrcRect, upperDstRect, texture,
                             direction, radius, sigma, true, bounds);
        convolve_gaussian_1d(drawContext, rt, clip, middleSrcRect, middleDstRect, texture,
                             direction, radius, sigma, false, bounds);
    }
}

SkRect VideoLayerAndroid::calVideoRect(const SkRect& rect)
{
    SkRect videoRect = rect;
    VideoLayerManager* manager = TilesManager::instance()->videoLayerManager();
    float aspectRatio = manager->getAspectRatio(uniqueId());
    float deltaY = rect.height() - rect.width() / aspectRatio;
    if (deltaY >= 0)
        videoRect.inset(0, deltaY / 2);
    else {
        float deltaX = rect.width() - rect.height() * aspectRatio;
        if (deltaX >= 0)
            videoRect.inset(deltaX / 2, 0);
    }
    return videoRect;
}

    virtual void onDrawContent(SkCanvas* canvas) {
        canvas->drawColor(SK_ColorWHITE);
        canvas->translate(SkIntToScalar(20), SkIntToScalar(20));

        static const CanvasProc gProc[] = {
            show_text, show_thick, show_hair, show_fill
        };
        
        SkRect r = { 0, 0, SkIntToScalar(W), SkIntToScalar(H) };
        SkPath clipPath;
        r.inset(SK_Scalar1 / 4, SK_Scalar1 / 4);
        clipPath.addRoundRect(r, SkIntToScalar(20), SkIntToScalar(20));

//        clipPath.toggleInverseFillType();

        for (int aa = 0; aa <= 1; ++aa) {
            canvas->save();
            for (size_t i = 0; i < SK_ARRAY_COUNT(gProc); ++i) {
                canvas->save();
                canvas->clipPath(clipPath, SkRegion::kIntersect_Op, true);
//                canvas->drawColor(SK_ColorWHITE);
                gProc[i](canvas, SkToBool(aa));
                canvas->restore();
                canvas->translate(W * SK_Scalar1 * 8 / 7, 0);
            }
            canvas->restore();
            canvas->translate(0, H * SK_Scalar1 * 8 / 7);
        }
    }

 virtual void onDraw(SkCanvas* canvas) {
     switch (fStyle) {
         case kRect_Style:
             canvas->drawRect(fRect, fPaint);
             break;
         case kOval_Style:
             canvas->drawOval(fRect, fPaint);
             break;
         case kRRect_Style: {
             SkScalar rx = fRect.width() / 5;
             SkScalar ry = fRect.height() / 5;
             if (rx < ry) {
                 ry = rx;
             } else {
                 rx = ry;
             }
             canvas->drawRoundRect(fRect, rx, ry, fPaint);
             break;
         }
         case kFrame_Style: {
             SkPath path;
             path.addOval(fRect, SkPath::kCW_Direction);
             SkRect r = fRect;
             r.inset(fRect.width()/6, 0);
             path.addOval(r, SkPath::kCCW_Direction);
             canvas->drawPath(path, fPaint);
             break;
         }
     }
 }

    void onDraw(SkCanvas* canvas) override {
        canvas->translate(20, 20);

        SkRect r = SkRect::MakeWH(1000, 1000);

        SkPaint paint;
        paint.setAntiAlias(true);
        paint.setStyle(SkPaint::kStroke_Style);
        paint.setStrokeWidth(15);

        const SkScalar inset = paint.getStrokeWidth() + 4;
        const SkScalar sweepAngle = 345;
        SkRandom rand;

        SkScalar sign = 1;
        while (r.width() > paint.getStrokeWidth() * 3) {
            paint.setColor(sk_tool_utils::color_to_565(rand.nextU() | (0xFF << 24)));
            SkScalar startAngle = rand.nextUScalar1() * 360;

            SkScalar speed = SkScalarSqrt(16 / r.width()) * 0.5f;
            startAngle += fRotate * 360 * speed * sign;

            SkPath path;
            path.addArc(r, startAngle, sweepAngle);
            canvas->drawPath(path, paint);

            r.inset(inset, inset);
            sign = -sign;
        }
    }

static void draw_2_bitmaps(SkCanvas* canvas, const SkBitmap& bm, bool doClip,
                           int dx, int dy, SkImageFilter* filter = NULL) {
    SkAutoCanvasRestore acr(canvas, true);
    SkPaint paint;

    SkRect clipR = SkRect::MakeXYWH(SkIntToScalar(dx),
                                    SkIntToScalar(dy),
                                    SkIntToScalar(bm.width()),
                                    SkIntToScalar(bm.height()));

    paint.setImageFilter(filter);
    clipR.inset(5, 5);

    if (doClip) {
        canvas->save();
        canvas->clipRect(clipR);
    }
    canvas->drawSprite(bm, dx, dy, &paint);
    if (doClip) {
        canvas->restore();
    }

    canvas->translate(SkIntToScalar(bm.width() + 20), 0);

    if (doClip) {
        canvas->save();
        canvas->clipRect(clipR);
    }
    canvas->drawBitmap(bm, SkIntToScalar(dx), SkIntToScalar(dy), &paint);
    if (doClip) {
        canvas->restore();
    }
}

static void patheffect_slide(SkCanvas* canvas) {
    SkPaint paint;
    paint.setAntiAlias(true);
    paint.setStyle(SkPaint::kStroke_Style);

    SkPath path;
    path.moveTo(20, 20);
    path.lineTo(70, 120);
    path.lineTo(120, 30);
    path.lineTo(170, 80);
    path.lineTo(240, 50);

    size_t i;
    canvas->save();
    for (i = 0; i < SK_ARRAY_COUNT(gPE); i++) {
        gPE[i](&paint);
        canvas->drawPath(path, paint);
        canvas->translate(0, 75);
    }
    canvas->restore();

    path.reset();
    SkRect r = { 0, 0, 250, 120 };
    path.addOval(r, SkPath::kCW_Direction);
    r.inset(50, 50);
    path.addRect(r, SkPath::kCCW_Direction);

    canvas->translate(320, 20);
    for (i = 0; i < SK_ARRAY_COUNT(gPE2); i++) {
        gPE2[i](&paint);
        canvas->drawPath(path, paint);
        canvas->translate(0, 160);
    }
}

static SkScalar drawCell(SkCanvas* canvas, SkXfermode* mode,
                         SkAlpha a0, SkAlpha a1) {

    SkPaint paint;
    paint.setAntiAlias(true);

    SkRect r = SkRect::MakeWH(W, H);
    r.inset(W/10, H/10);

    paint.setColor(SK_ColorBLUE);
    paint.setAlpha(a0);
    canvas->drawOval(r, paint);

    paint.setColor(SK_ColorRED);
    paint.setAlpha(a1);
    paint.setXfermode(mode);

    SkScalar offset = SK_Scalar1 / 3;
    SkRect rect = SkRect::MakeXYWH(W / 4 + offset,
                                   H / 4 + offset,
                                   W / 2, H / 2);
    canvas->drawRect(rect, paint);
    
    return H;
}

void FatBits::drawLine(SkCanvas* canvas, SkPoint pts[]) {
    SkPaint paint;

    fInverse.mapPoints(pts, 2);

    if (fGrid) {
        apply_grid(pts, 2);
    }

    erase(fMinSurface);
    this->setupPaint(&paint);
    paint.setColor(FAT_PIXEL_COLOR);
    if (fUseClip) {
        fMinSurface->getCanvas()->save();
        SkRect r = fClipRect;
        r.inset(SK_Scalar1/3, SK_Scalar1/3);
        fMinSurface->getCanvas()->clipRect(r, SkRegion::kIntersect_Op, true);
    }
    fMinSurface->getCanvas()->drawLine(pts[0].fX, pts[0].fY, pts[1].fX, pts[1].fY, paint);
    if (fUseClip) {
        fMinSurface->getCanvas()->restore();
    }
    this->copyMinToMax();

    SkCanvas* max = fMaxSurface->getCanvas();

    fMatrix.mapPoints(pts, 2);
    this->drawLineSkeleton(max, pts);

    fMaxSurface->draw(canvas, 0, 0, NULL);
}

static void draw_rect(SkCanvas* canvas, bool showGL, int flags) {
    SkPaint paint;
    paint.setAntiAlias(true);

    SkRect r = SkRect::MakeLTRB(50, 70, 250, 370);

    setFade(&paint, showGL);
    canvas->drawRect(r, paint);
    if (showGL) {
        show_mesh(canvas, r);
    }

    canvas->translate(320, 0);

    paint.setStyle(SkPaint::kStroke_Style);
    paint.setStrokeWidth(25);
    canvas->drawRect(r, paint);
    if (showGL) {
        SkScalar rad = paint.getStrokeWidth() / 2;
        SkPoint pts[8];
        r.outset(rad, rad);
        r.toQuad(&pts[0]);
        r.inset(rad*2, rad*2);
        r.toQuad(&pts[4]);

        const uint16_t indices[] = {
            0, 4, 1, 5, 2, 6, 3, 7, 0, 4
        };
        show_mesh(canvas, pts, indices, SK_ARRAY_COUNT(indices));
    }
}

static SkScalar drawCell(SkCanvas* canvas, SkXfermode* mode, SkAlpha a0, SkAlpha a1)
    {

    SkPaint paint;
    paint.setAntiAlias(true);

    SkRect r = SkRect::MakeWH(W, H);
    r.inset(W/10, H/10);

    paint.setColor(SK_ColorBLUE);
    paint.setAlpha(a0);
    canvas->drawOval(r, paint);

    paint.setColor(SK_ColorRED);
    paint.setAlpha(a1);
    paint.setXfermode(mode);
    for (int angle = 0; angle < 24; ++angle)
        {
        SkScalar x = SkScalarCos(SkIntToScalar(angle) * (SK_ScalarPI * 2) / 24) * gWidth;
        SkScalar y = SkScalarSin(SkIntToScalar(angle) * (SK_ScalarPI * 2) / 24) * gHeight;
        paint.setStrokeWidth(SK_Scalar1 * angle * 2 / 24);
        canvas->drawLine(W/2, H/2, W/2 + x, H/2 + y, paint);
        }

    return H;
    }

// found and fixed for webkit: mishandling when we hit recursion limit on
// mostly degenerate cubic flatness test
DEF_TEST(Paint_regression_cubic, reporter) {
    SkPath path, stroke;
    SkPaint paint;

    path.moveTo(460.2881309415525f,
                303.250847066498f);
    path.cubicTo(463.36378422175284f,
                 302.1169735073363f,
                 456.32239330810046f,
                 304.720354932878f,
                 453.15255460013304f,
                 305.788586869862f);

    SkRect fillR, strokeR;
    fillR = path.getBounds();

    paint.setStyle(SkPaint::kStroke_Style);
    paint.setStrokeWidth(SkIntToScalar(2));
    paint.getFillPath(path, &stroke);
    strokeR = stroke.getBounds();

    SkRect maxR = fillR;
    SkScalar miter = SkMaxScalar(SK_Scalar1, paint.getStrokeMiter());
    SkScalar inset = paint.getStrokeJoin() == SkPaint::kMiter_Join ?
                            SkScalarMul(paint.getStrokeWidth(), miter) :
                            paint.getStrokeWidth();
    maxR.inset(-inset, -inset);

    // test that our stroke didn't explode
    REPORTER_ASSERT(reporter, maxR.contains(strokeR));
}

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);
}

 void draw(SkCanvas* canvas,
           const SkRect& rect,
           const SkSize& deviceSize,
           SkPaint::FilterLevel filterLevel,
           SkImageFilter* input = NULL) {
     SkRect dstRect;
     canvas->getTotalMatrix().mapRect(&dstRect, rect);
     canvas->save();
     SkScalar deviceScaleX = SkScalarDiv(deviceSize.width(), dstRect.width());
     SkScalar deviceScaleY = SkScalarDiv(deviceSize.height(), dstRect.height());
     canvas->translate(rect.x(), rect.y());
     canvas->scale(deviceScaleX, deviceScaleY);
     canvas->translate(-rect.x(), -rect.y());
     SkMatrix matrix;
     matrix.setScale(SkScalarInvert(deviceScaleX),
                     SkScalarInvert(deviceScaleY));
     SkAutoTUnref<SkImageFilter> imageFilter(
         SkMatrixImageFilter::Create(matrix, filterLevel, input));
     SkPaint filteredPaint;
     filteredPaint.setImageFilter(imageFilter.get());
     canvas->saveLayer(&rect, &filteredPaint);
     SkPaint paint;
     paint.setColor(0xFF00FF00);
     SkRect ovalRect = rect;
     ovalRect.inset(SkIntToScalar(4), SkIntToScalar(4));
     canvas->drawOval(ovalRect, paint);
     canvas->restore(); // for saveLayer
     canvas->restore();
 }

static SkBitmap make_bmp(int w, int h) {
    SkBitmap bmp;
    bmp.allocN32Pixels(w, h, true);

    SkCanvas canvas(bmp);
    SkScalar wScalar = SkIntToScalar(w);
    SkScalar hScalar = SkIntToScalar(h);

    SkPoint     pt = { wScalar / 2, hScalar / 2 };

    SkScalar    radius = 3 * SkMaxScalar(wScalar, hScalar);

    SkColor colors[] = {SK_ColorDKGRAY,
                        ToolUtils::color_to_565(0xFF222255),
                        ToolUtils::color_to_565(0xFF331133),
                        ToolUtils::color_to_565(0xFF884422),
                        ToolUtils::color_to_565(0xFF000022),
                        SK_ColorWHITE,
                        ToolUtils::color_to_565(0xFFAABBCC)};

    SkScalar    pos[] = {0,
                         SK_Scalar1 / 6,
                         2 * SK_Scalar1 / 6,
                         3 * SK_Scalar1 / 6,
                         4 * SK_Scalar1 / 6,
                         5 * SK_Scalar1 / 6,
                         SK_Scalar1};

    SkPaint paint;
    SkRect rect = SkRect::MakeWH(wScalar, hScalar);
    SkMatrix mat = SkMatrix::I();
    for (int i = 0; i < 4; ++i) {
        paint.setShader(SkGradientShader::MakeRadial(
                        pt, radius,
                        colors, pos,
                        SK_ARRAY_COUNT(colors),
                        SkTileMode::kRepeat,
                        0, &mat));
        canvas.drawRect(rect, paint);
        rect.inset(wScalar / 8, hScalar / 8);
        mat.preTranslate(6 * wScalar, 6 * hScalar);
        mat.postScale(SK_Scalar1 / 3, SK_Scalar1 / 3);
    }

    SkFont font(ToolUtils::create_portable_typeface(), wScalar / 2.2f);

    paint.setShader(nullptr);
    paint.setColor(SK_ColorLTGRAY);
    constexpr char kTxt[] = "Skia";
    SkPoint texPos = { wScalar / 17, hScalar / 2 + font.getSize() / 2.5f };
    canvas.drawSimpleText(kTxt, SK_ARRAY_COUNT(kTxt)-1, SkTextEncoding::kUTF8,
                          texPos.fX, texPos.fY, font, paint);
    paint.setColor(SK_ColorBLACK);
    paint.setStyle(SkPaint::kStroke_Style);
    paint.setStrokeWidth(SK_Scalar1);
    canvas.drawSimpleText(kTxt, SK_ARRAY_COUNT(kTxt)-1, SkTextEncoding::kUTF8,
                          texPos.fX, texPos.fY, font, paint);
    return bmp;
}