C++ SkPath::addPoly方法代码示例

void SkBaseDevice::drawAtlas(const SkDraw& draw, const SkImage* atlas, const SkRSXform xform[],
                             const SkRect tex[], const SkColor colors[], int count,
                             SkXfermode::Mode mode, const SkPaint& paint) {
    SkPath path;
    path.setIsVolatile(true);

    for (int i = 0; i < count; ++i) {
        SkPoint quad[4];
        xform[i].toQuad(tex[i].width(), tex[i].height(), quad);

        SkMatrix localM;
        localM.setRSXform(xform[i]);
        localM.preTranslate(-tex[i].left(), -tex[i].top());

        SkPaint pnt(paint);
        sk_sp<SkShader> shader = atlas->makeShader(SkShader::kClamp_TileMode,
                                                   SkShader::kClamp_TileMode,
                                                   &localM);
        if (!shader) {
            break;
        }
        pnt.setShader(std::move(shader));

        if (colors) {
            pnt.setColorFilter(SkColorFilter::MakeModeFilter(colors[i], mode));
        }

        path.rewind();
        path.addPoly(quad, 4, true);
        path.setConvexity(SkPath::kConvex_Convexity);
        this->drawPath(draw, path, pnt, nullptr, true);
    }
}

// Test out the normal blur style with a wide range of sigmas
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(BlurSigmaRange, reporter, context) {
    static const int kSize = 100;

    // The geometry is offset a smidge to trigger:
    // https://code.google.com/p/chromium/issues/detail?id=282418
    SkPath rectPath;
    rectPath.addRect(0.3f, 0.3f, 100.3f, 100.3f);

    SkPoint polyPts[] = {
        { 0.3f, 0.3f },
        { 100.3f, 0.3f },
        { 100.3f, 100.3f },
        { 0.3f, 100.3f },
        { 2.3f, 50.3f }     // a little divet to throw off the rect special case
    };
    SkPath polyPath;
    polyPath.addPoly(polyPts, SK_ARRAY_COUNT(polyPts), true);

    int rectSpecialCaseResult[kSize];
    int generalCaseResult[kSize];
    int groundTruthResult[kSize];
    int bruteForce1DResult[kSize];

    SkScalar sigma = 10.0f;

    for (int i = 0; i < 4; ++i, sigma /= 10) {

        cpu_blur_path(rectPath, sigma, rectSpecialCaseResult, kSize);
        cpu_blur_path(polyPath, sigma, generalCaseResult, kSize);

        ground_truth_2d(100, 100, sigma, groundTruthResult, kSize);
        brute_force_1d(-50.0f, 50.0f, sigma, bruteForce1DResult, kSize);

        REPORTER_ASSERT(reporter, match(rectSpecialCaseResult, bruteForce1DResult, kSize, 5));
        REPORTER_ASSERT(reporter, match(generalCaseResult, bruteForce1DResult, kSize, 15));
#if SK_SUPPORT_GPU
#if 0
        int gpuResult[kSize];
        bool haveGPUResult = gpu_blur_path(context, rectPath, sigma, gpuResult, kSize);
        // Disabling this test for now -- I don't think it's a legit comparison.
        // Will continue to investigate this.
        if (haveGPUResult) {
            // 1 works everywhere but: Ubuntu13 & Nexus4
            REPORTER_ASSERT(reporter, match(gpuResult, bruteForce1DResult, kSize, 10));
        }
#endif
#endif
        REPORTER_ASSERT(reporter, match(groundTruthResult, bruteForce1DResult, kSize, 1));

#if WRITE_CSV
        write_as_csv("RectSpecialCase", sigma, rectSpecialCaseResult, kSize);
        write_as_csv("GeneralCase", sigma, generalCaseResult, kSize);
#if SK_SUPPORT_GPU
        write_as_csv("GPU", sigma, gpuResult, kSize);
#endif
        write_as_csv("GroundTruth2D", sigma, groundTruthResult, kSize);
        write_as_csv("BruteForce1D", sigma, bruteForce1DResult, kSize);
#endif
    }
}

void SkSVGDevice::drawPoints(const SkDraw& draw, SkCanvas::PointMode mode, size_t count,
                             const SkPoint pts[], const SkPaint& paint) {
    SkPath path;

    switch (mode) {
            // todo
        case SkCanvas::kPoints_PointMode:
            SkDebugf("unsupported operation: drawPoints(kPoints_PointMode)\n");
            break;
        case SkCanvas::kLines_PointMode:
            count -= 1;
            for (size_t i = 0; i < count; i += 2) {
                path.rewind();
                path.moveTo(pts[i]);
                path.lineTo(pts[i+1]);
                AutoElement elem("path", fWriter, fResourceBucket, draw, paint);
                elem.addPathAttributes(path);
            }
            break;
        case SkCanvas::kPolygon_PointMode:
            if (count > 1) {
                path.addPoly(pts, SkToInt(count), false);
                path.moveTo(pts[0]);
                AutoElement elem("path", fWriter, fResourceBucket, draw, paint);
                elem.addPathAttributes(path);
            }
            break;
    }
}

void SkBaseDevice::drawAtlas(const SkDraw& draw, const SkImage* atlas, const SkRSXform xform[],
                             const SkRect tex[], const SkColor colors[], int count,
                             SkXfermode::Mode mode, const SkPaint& paint) {
    SkPath path;
    path.setIsVolatile(true);

    for (int i = 0; i < count; ++i) {
        SkPoint quad[4];
        xform[i].toQuad(tex[i].width(), tex[i].height(), quad);
        
        SkMatrix localM;
        localM.setRSXform(xform[i]);
        localM.preTranslate(-tex[i].left(), -tex[i].top());

        SkPaint pnt(paint);
        pnt.setShader(atlas->newShader(SkShader::kClamp_TileMode, SkShader::kClamp_TileMode,
                                       &localM))->unref();
        if (colors && colors[i] != SK_ColorWHITE) {
            SkAutoTUnref<SkColorFilter> cf(SkColorFilter::CreateModeFilter(colors[i], mode));
            pnt.setColorFilter(cf);
        }
        
        path.rewind();
        path.addPoly(quad, 4, true);
        path.setConvexity(SkPath::kConvex_Convexity);
        this->drawPath(draw, path, pnt, NULL, true);
    }
}

void draw(SkCanvas* canvas) {
    SkPaint paint;
    paint.setStrokeWidth(15);
    paint.setStrokeCap(SkPaint::kRound_Cap);
    SkPath path;
    const SkPoint points[] = {{20, 20}, {70, 20}, {40, 90}};
    path.addPoly(points, SK_ARRAY_COUNT(points), false);
    for (int loop = 0; loop < 2; ++loop) {
        for (auto style : {SkPaint::kStroke_Style, SkPaint::kFill_Style,
                SkPaint::kStrokeAndFill_Style} ) {
            paint.setStyle(style);
            canvas->drawPath(path, paint);
            canvas->translate(85, 0);
        }
        path.close();
        canvas->translate(-255, 128);
    }
}

void draw(SkCanvas* canvas) {
    SkCanvas device(256, 256);
    canvas = &device;
    SkIRect bounds = canvas->getDeviceClipBounds();
    SkDebugf("left:%d  top:%d  right:%d  bottom:%d\n",
            bounds.fLeft, bounds.fTop, bounds.fRight, bounds.fBottom);
    SkPoint clipPoints[]  = {{30, 130}, {120, 130}, {120, 230} };
    SkPath clipPath;
    clipPath.addPoly(clipPoints, SK_ARRAY_COUNT(clipPoints), true);
    canvas->save();
    canvas->clipPath(clipPath);
    bounds = canvas->getDeviceClipBounds();
    SkDebugf("left:%d  top:%d  right:%d  bottom:%d\n",
            bounds.fLeft, bounds.fTop, bounds.fRight, bounds.fBottom);
    canvas->restore();
    canvas->scale(1.f/2, 1.f/2);
    canvas->clipPath(clipPath);
    bounds = canvas->getDeviceClipBounds();
    SkDebugf("left:%d  top:%d  right:%d  bottom:%d\n",
            bounds.fLeft, bounds.fTop, bounds.fRight, bounds.fBottom);
}

void SkScan::FillTriangle(const SkPoint pts[], const SkRasterClip& clip,
                          SkBlitter* blitter) {
    if (clip.isEmpty()) {
        return;
    }

    SkRect  r;
    r.set(pts, 3);
    // If r is too large (larger than can easily fit in SkFixed) then we need perform geometric
    // clipping. This is a bit of work, so we just call the general FillPath() to handle it.
    // Use FixedMax/2 as the limit so we can subtract two edges and still store that in Fixed.
    const SkScalar limit = SK_MaxS16 >> 1;
    if (!SkRect::MakeLTRB(-limit, -limit, limit, limit).contains(r)) {
        SkPath path;
        path.addPoly(pts, 3, false);
        FillPath(path, clip, blitter);
        return;
    }

    SkIRect ir = conservative_round_to_int(r);
    if (ir.isEmpty() || !SkIRect::Intersects(ir, clip.getBounds())) {
        return;
    }

    SkAAClipBlitterWrapper wrap;
    const SkRegion* clipRgn;
    if (clip.isBW()) {
        clipRgn = &clip.bwRgn();
    } else {
        wrap.init(clip, blitter);
        clipRgn = &wrap.getRgn();
        blitter = wrap.getBlitter();
    }

    SkScanClipper clipper(blitter, clipRgn, ir);
    blitter = clipper.getBlitter();
    if (blitter) {
        sk_fill_triangle(pts, clipper.getClipRect(), blitter, ir);
    }
}

SkPath makePath() {
    SkPath path;
    for (uint32_t cIndex = 0; cIndex < fPathContourCount; ++cIndex) {
        uint32_t segments = makeSegmentCount();
        for (uint32_t sIndex = 0; sIndex < segments; ++sIndex) {
            RandomAddPath addPathType = makeAddPathType();
            ++fAddCount;
            if (fPrintName) {
                SkDebugf("%.*s%s\n", fPathDepth * 3, fTab,
                        gRandomAddPathNames[addPathType]);
            }
            switch (addPathType) {
                case kAddArc: {
                    SkRect oval = makeRect();
                    SkScalar startAngle = makeAngle();
                    SkScalar sweepAngle = makeAngle();
                    path.addArc(oval, startAngle, sweepAngle);
                    validate(path);
                    } break;
                case kAddRoundRect1: {
                    SkRect rect = makeRect();
                    SkScalar rx = makeScalar(), ry = makeScalar();
                    SkPath::Direction dir = makeDirection();
                    path.addRoundRect(rect, rx, ry, dir);
                    validate(path);
                    } break;
                case kAddRoundRect2: {
                    SkRect rect = makeRect();
                    SkScalar radii[8];
                    makeScalarArray(SK_ARRAY_COUNT(radii), radii);
                    SkPath::Direction dir = makeDirection();
                    path.addRoundRect(rect, radii, dir);
                    validate(path);
                    } break;
                case kAddRRect: {
                    SkRRect rrect = makeRRect();
                    SkPath::Direction dir = makeDirection();
                    path.addRRect(rrect, dir);
                    validate(path);
                    } break;
                case kAddPoly: {
                    SkTDArray<SkPoint> points;
                    makePointArray(&points);
                    bool close = makeBool();
                    path.addPoly(&points[0], points.count(), close);
                    validate(path);
                    } break;
                case kAddPath1:
                    if (fPathDepth < fPathDepthLimit) {
                        ++fPathDepth;
                        SkPath src = makePath();
                        validate(src);
                        SkScalar dx = makeScalar();
                        SkScalar dy = makeScalar();
                        SkPath::AddPathMode mode = makeAddPathMode();
                        path.addPath(src, dx, dy, mode);
                        --fPathDepth;
                        validate(path);
                    }
                    break;
                case kAddPath2:
                    if (fPathDepth < fPathDepthLimit) {
                        ++fPathDepth;
                        SkPath src = makePath();
                        validate(src);
                        SkPath::AddPathMode mode = makeAddPathMode();
                        path.addPath(src, mode);
                        --fPathDepth;
                        validate(path);
                    }
                    break;
                case kAddPath3:
                    if (fPathDepth < fPathDepthLimit) {
                        ++fPathDepth;
                        SkPath src = makePath();
                        validate(src);
                        SkMatrix matrix = makeMatrix();
                        SkPath::AddPathMode mode = makeAddPathMode();
                        path.addPath(src, matrix, mode);
                        --fPathDepth;
                        validate(path);
                    }
                    break;
                case kReverseAddPath:
                    if (fPathDepth < fPathDepthLimit) {
                        ++fPathDepth;
                        SkPath src = makePath();
                        validate(src);
                        path.reverseAddPath(src);
                        --fPathDepth;
                        validate(path);
                    }
                    break;
                case kMoveToPath: {
                    SkScalar x = makeScalar();
                    SkScalar y = makeScalar();
                    path.moveTo(x, y);
                    validate(path);
                    } break;
                case kRMoveToPath: {
//.........这里部分代码省略.........

static void drawInBitmap(SkBitmap &bitmap)
{
    
    SkCanvas canvas(bitmap);
    canvas.clear(SK_ColorWHITE);
    
    SkPaint myPaint;
    myPaint.setAntiAlias(true);
    myPaint.setColor(SK_ColorBLACK);
    myPaint.setStrokeWidth(SkIntToScalar(1));
    
    canvas.translate(SkIntToScalar(36), SkIntToScalar(36));
    
    canvas.scale(SkIntToScalar(1), SkIntToScalar(-1));
    canvas.scale(SkDoubleToScalar(0.17), SkDoubleToScalar(0.17));
    
    {
        SkPoint linearPoints[] = {
            {SkIntToScalar(-58), SkIntToScalar(13)},
            {SkIntToScalar(-58+(116/2)), SkIntToScalar(13)}
        };
        SkColor linearColors[] = {SK_ColorBLACK, SK_ColorLTGRAY};
        SkShader* shader = SkGradientShader::CreateLinear(
                                                          linearPoints, linearColors, NULL, 2,
                                                          SkShader::kMirror_TileMode);
        SkAutoUnref shader_deleter(shader);
        myPaint.setShader(shader);
        myPaint.setFlags(SkPaint::kAntiAlias_Flag);
        
        SkRect rect0;
        rect0.setXYWH(SkIntToScalar(-58), SkIntToScalar(13), SkIntToScalar(116), SkIntToScalar(76));
        canvas.drawRect(rect0,myPaint);

        // Detach shader
        myPaint.setShader(NULL);
    }
    myPaint.setColor(SK_ColorBLACK);
    myPaint.setStyle(SkPaint::kStrokeAndFill_Style);
    
    SkRect rect;
    rect.setXYWH(SkIntToScalar(-60), SkIntToScalar(75), SkIntToScalar(120), SkIntToScalar(6));
    
    canvas.drawRect(rect, myPaint);
    
    SkRect rect1;
    rect1.setXYWH(SkIntToScalar(-60), SkIntToScalar(61), SkIntToScalar(120), SkIntToScalar(6));
    canvas.drawRect(rect1, myPaint);

    SkRect rect2;
    rect2.setXYWH(SkIntToScalar(-60), SkIntToScalar(49), SkIntToScalar(120), SkIntToScalar(6));
    canvas.drawRect(rect2, myPaint);

    SkPoint pts0[] = {
        {-60,11},
        {-42,23},
        {38,23},
        {56,11},
        {-60,11}
    };
    
    myPaint.setColor(SK_ColorBLUE);
    myPaint.setStyle(SkPaint::kStroke_Style);
    SkPath path0;
    path0.addPoly(pts0, 5, true);
    
    canvas.drawPath(path0, myPaint);
    
    path0.addPoly(pts0, 5, true);
    myPaint.setColor(SK_ColorWHITE);
    myPaint.setStyle(SkPaint::kFill_Style);
    canvas.drawPath(path0, myPaint);


    myPaint.setColor(SK_ColorBLACK);

    
    myPaint.setStyle(SkPaint::kStroke_Style);

    canvas.drawLine(SkIntToScalar(-100), SkIntToScalar(-90), SkIntToScalar(100), SkIntToScalar(-91), myPaint);
    
    canvas.drawLine(SkIntToScalar(0), SkIntToScalar(-90), SkIntToScalar(26), SkIntToScalar(-58), myPaint);
    
    canvas.drawLine(SkIntToScalar(26), SkIntToScalar(-58), SkIntToScalar(-2), SkIntToScalar(37), myPaint);
    
    myPaint.setStyle(SkPaint::kStrokeAndFill_Style);

    canvas.drawCircle(SkIntToScalar(0), SkIntToScalar(33), SkIntToScalar(4), myPaint);

    myPaint.setStyle(SkPaint::kStroke_Style);

    canvas.drawCircle(SkDoubleToScalar(0), SkDoubleToScalar(-(129+49)/2), SkIntToScalar(40), myPaint);
    
    myPaint.setColor(SK_ColorLTGRAY);
    myPaint.setStyle(SkPaint::kStrokeAndFill_Style);
    SkPoint pts[9];
    pts[0].set(-60, -50);
    pts[1].set(-60, 100);
    pts[2].set( 60, 100);
    pts[3].set(60, -52);
    pts[4].set(100, -52);
//.........这里部分代码省略.........