C++ SkPath::addRect方法代码示例

DEF_TEST(PathOpsBuilder, reporter) {
    SkOpBuilder builder;
    SkPath result;
    REPORTER_ASSERT(reporter, builder.resolve(&result));
    REPORTER_ASSERT(reporter, result.isEmpty());

    builder.add(result, kDifference_SkPathOp);
    REPORTER_ASSERT(reporter, builder.resolve(&result));
    REPORTER_ASSERT(reporter, result.isEmpty());

    builder.add(result, kUnion_SkPathOp);
    REPORTER_ASSERT(reporter, builder.resolve(&result));
    REPORTER_ASSERT(reporter, result.isEmpty());

    SkPath rectPath;
    rectPath.setFillType(SkPath::kEvenOdd_FillType);
    rectPath.addRect(0, 1, 2, 3, SkPath::kCW_Direction);
    builder.add(rectPath, kUnion_SkPathOp);
    REPORTER_ASSERT(reporter, builder.resolve(&result));
    bool closed;
    SkPath::Direction dir;
    REPORTER_ASSERT(reporter, result.isRect(nullptr, &closed, &dir));
    REPORTER_ASSERT(reporter, closed);
    REPORTER_ASSERT(reporter, dir == SkPath::kCCW_Direction);
    int pixelDiff = comparePaths(reporter, __FUNCTION__, rectPath, result);
    REPORTER_ASSERT(reporter, pixelDiff == 0);

    rectPath.reset();
    rectPath.setFillType(SkPath::kEvenOdd_FillType);
    rectPath.addRect(0, 1, 2, 3, SkPath::kCCW_Direction);
    builder.add(rectPath, kUnion_SkPathOp);
    REPORTER_ASSERT(reporter, builder.resolve(&result));
    REPORTER_ASSERT(reporter, result.isRect(nullptr, &closed, &dir));
    REPORTER_ASSERT(reporter, closed);
    REPORTER_ASSERT(reporter, dir == SkPath::kCCW_Direction);
    REPORTER_ASSERT(reporter, rectPath == result);

    builder.add(rectPath, kDifference_SkPathOp);
    REPORTER_ASSERT(reporter, builder.resolve(&result));
    REPORTER_ASSERT(reporter, result.isEmpty());

    SkPath rect2, rect3;
    rect2.addRect(2, 1, 4, 3, SkPath::kCW_Direction);
    rect3.addRect(4, 1, 5, 3, SkPath::kCCW_Direction);
    builder.add(rectPath, kUnion_SkPathOp);
    builder.add(rect2, kUnion_SkPathOp);
    builder.add(rect3, kUnion_SkPathOp);
    REPORTER_ASSERT(reporter, builder.resolve(&result));
    REPORTER_ASSERT(reporter, result.isRect(nullptr, &closed, &dir));
    REPORTER_ASSERT(reporter, closed);
    SkRect expected;
    expected.set(0, 1, 5, 3);
    REPORTER_ASSERT(reporter, result.getBounds() == expected);

    SkPath circle1, circle2, circle3;
    circle1.addCircle(5, 6, 4, SkPath::kCW_Direction);
    circle2.addCircle(7, 4, 8, SkPath::kCCW_Direction);
    circle3.addCircle(6, 5, 6, SkPath::kCW_Direction);
    SkPath opCompare;
    Op(circle1, circle2, kUnion_SkPathOp, &opCompare);
    Op(opCompare, circle3, kDifference_SkPathOp, &opCompare);
    builder.add(circle1, kUnion_SkPathOp);
    builder.add(circle2, kUnion_SkPathOp);
    builder.add(circle3, kDifference_SkPathOp);
    REPORTER_ASSERT(reporter, builder.resolve(&result));
    pixelDiff = comparePaths(reporter, __FUNCTION__, opCompare, result);
    REPORTER_ASSERT(reporter, pixelDiff == 0);
}

 static SkPath TestPath() {
     SkPath path;
     path.addRect(SkRect::MakeXYWH(SkIntToScalar(0), SkIntToScalar(0),
                                   SkIntToScalar(2), SkIntToScalar(1)));
     return path;
 }

// Test out the normal blur style with a wide range of sigmas
static void test_sigma_range(skiatest::Reporter* reporter, GrContextFactory* factory) {

    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(factory, 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
    }
}

static SkPath generate_rect_line(SkScalar cx, SkScalar cy, SkScalar l) {
    SkRect rect = SkRect::MakeXYWH(cx - l / 2, cy, l, 0);
    SkPath path;
    path.addRect(rect);
    return path;
}

DEF_TEST(Fuzz846, reporter) {
/*
<clipPath id="clip-circle">
    <circle id="circle" cx="60" cy="60" r="50" />
</clipPath>
<clipPath id="clip-rect">
    <clipPath id="clip-rect">
        <clipPath id="clip-rect">
            <clipPath id="clip-rect">
                <rect x="10" y="30" width="0" height="60" />
                <rect x="10" y="30" width="0" height="60" />
                <rect x="10" y="30" width="100" height="60" />
                <rect x="10" y="30" width="32668" />
                <rect x="10" y="30" width="100" height="18446744073709551615" />
                <rect x="10" y="255" width="100" height="60" />
                <rect width="100" height="60" />
                <rect x="10" y="30" width="100" height="60" />
                <rect x="10" y="30" width="100" height="4294967236" />
                <rect x="10" y="30" width="100" height="60" />
            </clipPath>
            <rect x="10" y="30" width="0" height="60" />
            <rect x="10" y="30" width="0" height="0.18093252719929986369568203" />
            <rect x="10" y="30" width="100" height="60" />
            <rect x="10" y="30" width="32668" height="60" />
            <rect x="10" y="30" width="100" height="18446744073709551615" />
            <rect x="10" y="255" width="100" height="60" />
            <rect x="2147483649" y="30" width="100" height="60" />
            <rect x="10" y="30" width="100" height="60" />
            <rect x="10" y="30" width="100" height="60" />
            <rect x="10" y="30" width="100" height="60" />
        </clipPath>
        <rect x="10" y="30" width="0" height="60" />
        <rect x="10" y="30" width="0" height="60" />
        <rect x="10" y="30" width="100" height="60" />
        <rect x="10" y="30" width="32668" height="60" />
        <rect x="10" y="30" width="100" height="18446744073709551615" />
        <rect x="10" y="255" width="100" height="60" />
        <rect x="2147483649" y="30" width="100" height="60" />
        <rect x="10" y="30" width="100" height="60" />
        <rect x="10" y="2879753595" width="100" height="60" />
        <rect x="10" y="30" width="100" height="60" />
    </clipPath>
    <rect x="10" y="30" width="100" height="60" />
    <rect x="10" y="30" width="0" height="60" />
    <rect x="10" y="30" width="100" height="60" />
    <rect x="10" y="30" width="32668" height="60" />
    <rect x="10" y="30" width="100" height="18446744073709551615" />
    <rect x="10" y="255" width="100" height="60" />
    <rect x="2147483649" y="30" width="100" height="60" />
    <rect x="10" y="30" width="100" height="60" />
    <rect x="10" y="30" width="100" height="4294967236" />
    <rect x="10" y="30" width="100" height="4294967236" />
    <rect x="10" y="30" width="100" height="4294967236" />
    <rect x="10" y="30" width="100" height="4294967236" />
    <rect x="10" y="30" width="100" height="60" />
    <rect x="757798030" y="30" width="100" height="60" />
*/
    SkPath clipCircle, clipRect;
    SkPath inner;
    clipCircle.addCircle(60, 60, 50);             // <circle id="circle" cx="60" cy="60" r="50" />

    inner.addRect(10, 30, 10+0, 30+60);           // <rect x="10" y="30" width="0" height="60" />
    inner.addRect(10, 30, 10+0, 30+60);           // <rect x="10" y="30" width="0" height="60" />
    inner.addRect(10, 30, 10+100, 30+60);         // <rect x="10" y="30" width="100" height="60" />
    inner.addRect(10, 30, 10+32668, 30+0);        // <rect x="10" y="30" width="32668" />
    inner.addRect(10, 30, 10+100, 30+18446744073709551615.f); // <rect x="10" y="30" width="100" height="18446744073709551615" />
    inner.addRect(10, 255, 10+100, 255+60);       // <rect x="10" y="255" width="100" height="60" />
    inner.addRect(0, 0, 0+100, 0+60);             //  <rect width="100" height="60" />
    inner.addRect(10, 30, 10+100, 30+60);         // <rect x="10" y="30" width="100" height="60" />
    inner.addRect(10, 30, 10+100, 30+4294967236.f); // <rect x="10" y="30" width="100" height="4294967236" />
    inner.addRect(10, 30, 10+100, 30+60);         // <rect x="10" y="30" width="100" height="60" />
    clipRect.addPath(inner);
    inner.reset();
    inner.addRect(10, 30, 10+0, 30+60);           // <rect x="10" y="30" width="0" height="60" />
    inner.addRect(10, 30, 10+0, 30+0.18093252719929986369568203f); // <rect x="10" y="30" width="0" height="0.18093252719929986369568203" />
    inner.addRect(10, 30, 10+100, 30+60);         // <rect x="10" y="30" width="100" height="60" />
    inner.addRect(10, 30, 10+32668, 30+60);       // <rect x="10" y="30" width="32668" height="60" />
    inner.addRect(10, 30, 10+100, 30+18446744073709551615.f); // <rect x="10" y="30" width="100" height="18446744073709551615" />
    inner.addRect(10, 255, 10+100, 255+60);       // <rect x="10" y="255" width="100" height="60" />
    inner.addRect(2147483649.f, 30, 2147483649.f+100, 30+60); // <rect x="2147483649" y="30" width="100" height="60" />
    inner.addRect(10, 30, 10+100, 30+60);         // <rect x="10" y="30" width="100" height="60" />
    inner.addRect(10, 30, 10+100, 30+60);         // <rect x="10" y="30" width="100" height="60" />
    inner.addRect(10, 30, 10+100, 30+60);         // <rect x="10" y="30" width="100" height="60" />
    clipRect.addPath(inner);
    inner.reset();
    inner.addRect(10, 30, 10+0, 30+60);           // <rect x="10" y="30" width="0" height="60" />
    inner.addRect(10, 30, 10+0, 30+60);           // <rect x="10" y="30" width="0" height="60" />
    inner.addRect(10, 30, 10+100, 30+60);         // <rect x="10" y="30" width="100" height="60" />
    inner.addRect(10, 30, 10+32668, 30+60);       // <rect x="10" y="30" width="32668" height="60" />
    inner.addRect(10, 30, 10+100, 30+18446744073709551615.f); // <rect x="10" y="30" width="100" height="18446744073709551615" />
    inner.addRect(10, 255, 10+100, 255+60);       // <rect x="10" y="255" width="100" height="60" />
    inner.addRect(2147483649.f, 30, 2147483649.f+100, 30+60); // <rect x="2147483649" y="30" width="100" height="60" />
    inner.addRect(10, 30, 10+100, 30+60);         // <rect x="10" y="30" width="100" height="60" />
    inner.addRect(10, 2879753595.f, 10+100, 30+2879753595.f); // <rect x="10" y="2879753595" width="100" height="60" />
    inner.addRect(10, 30, 10+100, 30+60);         // <rect x="10" y="30" width="100" height="60" />
    clipRect.addPath(inner);
    inner.reset();
    inner.addRect(10, 30, 10+100, 30+60);         // <rect x="10" y="30" width="100" height="60" />
    inner.addRect(10, 30, 10+0, 30+60);           // <rect x="10" y="30" width="0" height="60" />
    inner.addRect(10, 30, 10+100, 30+60);         // <rect x="10" y="30" width="100" height="60" />
//.........这里部分代码省略.........

static void test_close(skiatest::Reporter* reporter) {
    SkPath closePt;
    closePt.moveTo(0, 0);
    closePt.close();
    check_close(reporter, closePt);

    SkPath openPt;
    openPt.moveTo(0, 0);
    check_close(reporter, openPt);

    SkPath empty;
    check_close(reporter, empty);
    empty.close();
    check_close(reporter, empty);

    SkPath rect;
    rect.addRect(SK_Scalar1, SK_Scalar1, 10 * SK_Scalar1, 10*SK_Scalar1);
    check_close(reporter, rect);
    rect.close();
    check_close(reporter, rect);

    SkPath quad;
    quad.quadTo(SK_Scalar1, SK_Scalar1, 10 * SK_Scalar1, 10*SK_Scalar1);
    check_close(reporter, quad);
    quad.close();
    check_close(reporter, quad);

    SkPath cubic;
    quad.cubicTo(SK_Scalar1, SK_Scalar1, 10 * SK_Scalar1, 
                 10*SK_Scalar1, 20 * SK_Scalar1, 20*SK_Scalar1);
    check_close(reporter, cubic);
    cubic.close();
    check_close(reporter, cubic);

    SkPath line;
    line.moveTo(SK_Scalar1, SK_Scalar1);
    line.lineTo(10 * SK_Scalar1, 10*SK_Scalar1);
    check_close(reporter, line);
    line.close();
    check_close(reporter, line);

    SkPath rect2;
    rect2.addRect(SK_Scalar1, SK_Scalar1, 10 * SK_Scalar1, 10*SK_Scalar1);
    rect2.close();
    rect2.addRect(SK_Scalar1, SK_Scalar1, 10 * SK_Scalar1, 10*SK_Scalar1);
    check_close(reporter, rect2);
    rect2.close();
    check_close(reporter, rect2);

    SkPath oval3;
    oval3.addOval(SkRect::MakeWH(SK_Scalar1*100,SK_Scalar1*100));
    oval3.close();
    oval3.addOval(SkRect::MakeWH(SK_Scalar1*200,SK_Scalar1*200));
    check_close(reporter, oval3);
    oval3.close();
    check_close(reporter, oval3);

    SkPath moves;
    moves.moveTo(SK_Scalar1, SK_Scalar1);
    moves.moveTo(5 * SK_Scalar1, SK_Scalar1);
    moves.moveTo(SK_Scalar1, 10 * SK_Scalar1);
    moves.moveTo(10 *SK_Scalar1, SK_Scalar1);
    check_close(reporter, moves);

    stroke_tiny_cubic();
}

static void drawRectAsPath(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
    SkPath path;
    path.addRect(r);
    canvas->drawPath(path, p);
}

static SkPath generate_square(SkScalar cx, SkScalar cy, SkScalar w) {
    SkRect rect = SkRect::MakeXYWH(cx - w / 2, cy - w / 2, w, w);
    SkPath path;
    path.addRect(rect);
    return path;
}

SkPath Rect::onAsPath() const {
    SkPath path;
    path.addRect(fRect, this->getDirection(), this->getInitialPointIndex());
    return path;
}

//.........这里部分代码省略.........
                                          const GrClip& clip,
                                          const SkPaint& paint) {
    // Specifying the texture coords as local coordinates is an attempt to enable more GrDrawOp
    // combining by not baking anything about the srcRect, dstRect, or viewMatrix, into the texture
    // FP. In the future this should be an opaque optimization enabled by the combination of
    // GrDrawOp/GP and FP.
    const SkMaskFilter* mf = paint.getMaskFilter();
    // The shader expects proper local coords, so we can't replace local coords with texture coords
    // if the shader will be used. If we have a mask filter we will change the underlying geometry
    // that is rendered.
    bool canUseTextureCoordsAsLocalCoords = !use_shader(producer->isAlphaOnly(), paint) && !mf;

    bool doBicubic;
    GrSamplerParams::FilterMode fm =
        GrSkFilterQualityToGrFilterMode(paint.getFilterQuality(), viewMatrix, srcToDstMatrix,
                                        &doBicubic);
    const GrSamplerParams::FilterMode* filterMode = doBicubic ? nullptr : &fm;

    GrTextureProducer::FilterConstraint constraintMode;
    if (SkCanvas::kFast_SrcRectConstraint == constraint) {
        constraintMode = GrTextureAdjuster::kNo_FilterConstraint;
    } else {
        constraintMode = GrTextureAdjuster::kYes_FilterConstraint;
    }

    // If we have to outset for AA then we will generate texture coords outside the src rect. The
    // same happens for any mask filter that extends the bounds rendered in the dst.
    // This is conservative as a mask filter does not have to expand the bounds rendered.
    bool coordsAllInsideSrcRect = !paint.isAntiAlias() && !mf;

    // Check for optimization to drop the src rect constraint when on bilerp.
    if (filterMode && GrSamplerParams::kBilerp_FilterMode == *filterMode &&
        GrTextureAdjuster::kYes_FilterConstraint == constraintMode && coordsAllInsideSrcRect) {
        SkMatrix combinedMatrix;
        combinedMatrix.setConcat(viewMatrix, srcToDstMatrix);
        if (can_ignore_bilerp_constraint(*producer, clippedSrcRect, combinedMatrix,
                                         fRenderTargetContext->isUnifiedMultisampled())) {
            constraintMode = GrTextureAdjuster::kNo_FilterConstraint;
        }
    }

    const SkMatrix* textureMatrix;
    SkMatrix tempMatrix;
    if (canUseTextureCoordsAsLocalCoords) {
        textureMatrix = &SkMatrix::I();
    } else {
        if (!srcToDstMatrix.invert(&tempMatrix)) {
            return;
        }
        textureMatrix = &tempMatrix;
    }
    sk_sp<GrFragmentProcessor> fp(producer->createFragmentProcessor(
        *textureMatrix, clippedSrcRect, constraintMode, coordsAllInsideSrcRect, filterMode,
        fRenderTargetContext->getColorSpace()));
    if (!fp) {
        return;
    }

    GrPaint grPaint;
    if (!SkPaintToGrPaintWithTexture(fContext.get(), fRenderTargetContext.get(), paint, viewMatrix,
                                     fp, producer->isAlphaOnly(), &grPaint)) {
        return;
    }
    GrAA aa = GrBoolToAA(paint.isAntiAlias());
    if (canUseTextureCoordsAsLocalCoords) {
        fRenderTargetContext->fillRectToRect(clip, std::move(grPaint), aa, viewMatrix,
                                             clippedDstRect, clippedSrcRect);
        return;
    }

    if (!mf) {
        fRenderTargetContext->drawRect(clip, std::move(grPaint), aa, viewMatrix, clippedDstRect);
        return;
    }

    // First see if we can do the draw + mask filter direct to the dst.
    if (viewMatrix.isScaleTranslate()) {
        SkRect devClippedDstRect;
        viewMatrix.mapRectScaleTranslate(&devClippedDstRect, clippedDstRect);

        SkStrokeRec rec(SkStrokeRec::kFill_InitStyle);
        if (mf->directFilterRRectMaskGPU(fContext.get(),
                                         fRenderTargetContext.get(),
                                         std::move(grPaint),
                                         clip,
                                         viewMatrix,
                                         rec,
                                         SkRRect::MakeRect(clippedDstRect),
                                         SkRRect::MakeRect(devClippedDstRect))) {
            return;
        }
    }

    SkPath rectPath;
    rectPath.addRect(clippedDstRect);
    rectPath.setIsVolatile(true);
    GrBlurUtils::drawPathWithMaskFilter(this->context(), fRenderTargetContext.get(), this->clip(),
                                        rectPath, std::move(grPaint), aa, viewMatrix, mf,
                                        GrStyle::SimpleFill(), true);
}