C++ SkVector::x方法代码示例

bool SkBlurImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
                                       SkIRect* dst) const {
    SkIRect bounds = src;
    if (getInput(0) && !getInput(0)->filterBounds(src, ctm, &bounds)) {
        return false;
    }
    SkVector sigma = SkVector::Make(fSigma.width(), fSigma.height());
    ctm.mapVectors(&sigma, 1);
    bounds.outset(SkScalarCeilToInt(SkScalarMul(sigma.x(), SkIntToScalar(3))),
                  SkScalarCeilToInt(SkScalarMul(sigma.y(), SkIntToScalar(3))));
    *dst = bounds;
    return true;
}

    static sk_sp<SkImage> MakeImage(const SkVector& vec, SkColor color) {
        const SkPoint start = SkPoint::Make(vec.y() * kSegLen / 2, vec.x() * kSegLen / 2);
        const SkPoint end   = SkPoint::Make(start.x() + vec.x() * (kSegLen - 1),
                                            start.y() + vec.y() * (kSegLen - 1));

        SkAutoTUnref<SkSurface> surface(SkSurface::NewRasterN32Premul(kSegLen, kSegLen));
        surface->getCanvas()->clear(SK_ColorTRANSPARENT);

        SkPaint paint;
        paint.setAntiAlias(true);
        const SkRect border = SkRect::MakeIWH(kSegLen, kSegLen).makeInset(.5f, .5f);
        paint.setColor(SK_ColorBLUE);
        paint.setStyle(SkPaint::kStroke_Style);
        surface->getCanvas()->drawRect(border, paint);

        paint.setColor(SK_ColorBLACK);
        surface->getCanvas()->drawLine(start.x(), start.y(), end.x(), end.y(), paint);
        surface->getCanvas()->drawPoint(start.x(), start.y(), color);
        surface->getCanvas()->drawPoint(end.x(), end.y(), color);

        return surface->makeImageSnapshot();
    }

bool SkMorphologyImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
                                             SkIRect* dst) const {
    SkIRect bounds = src;
    SkVector radius = SkVector::Make(SkIntToScalar(this->radius().width()),
                                     SkIntToScalar(this->radius().height()));
    ctm.mapVectors(&radius, 1);
    bounds.outset(SkScalarCeilToInt(radius.x()), SkScalarCeilToInt(radius.y()));
    if (getInput(0) && !getInput(0)->filterBounds(bounds, ctm, &bounds)) {
        return false;
    }
    *dst = bounds;
    return true;
}

SkSpecialImage* SkOffsetImageFilter::onFilterImage(SkSpecialImage* source,
                                                   const Context& ctx,
                                                   SkIPoint* offset) const {
    SkIPoint srcOffset = SkIPoint::Make(0, 0);
    SkAutoTUnref<SkSpecialImage> input(this->filterInput(0, source, ctx, &srcOffset));
    if (!input) {
        return nullptr;
    }

    SkVector vec;
    ctx.ctm().mapVectors(&vec, &fOffset, 1);

    if (!this->cropRectIsSet()) {
        offset->fX = srcOffset.fX + SkScalarRoundToInt(vec.fX);
        offset->fY = srcOffset.fY + SkScalarRoundToInt(vec.fY);
        return input.release();
    } else {
        SkIRect bounds;
        SkIRect srcBounds = SkIRect::MakeWH(input->width(), input->height());
        srcBounds.offset(srcOffset);
        if (!this->applyCropRect(ctx, srcBounds, &bounds)) {
            return nullptr;
        }

        SkImageInfo info = SkImageInfo::MakeN32(bounds.width(), bounds.height(),
                                                kPremul_SkAlphaType);
        sk_sp<SkSpecialSurface> surf(source->makeSurface(info));
        if (!surf) {
            return nullptr;
        }

        SkCanvas* canvas = surf->getCanvas();
        SkASSERT(canvas);

        // TODO: it seems like this clear shouldn't be necessary (see skbug.com/5075)
        canvas->clear(0x0);

        SkPaint paint;
        paint.setXfermodeMode(SkXfermode::kSrc_Mode);
        canvas->translate(SkIntToScalar(srcOffset.fX - bounds.fLeft),
                          SkIntToScalar(srcOffset.fY - bounds.fTop));

        input->draw(canvas, vec.x(), vec.y(), &paint);

        offset->fX = bounds.fLeft;
        offset->fY = bounds.fTop;
        return surf->makeImageSnapshot().release();
    }
}

bool SkOffsetImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& source,
                                        const Context& ctx,
                                        SkBitmap* result,
                                        SkIPoint* offset) const {
    SkBitmap src = source;
    SkIPoint srcOffset = SkIPoint::Make(0, 0);
    if (!cropRectIsSet()) {
        if (!this->filterInput(0, proxy, source, ctx, &src, &srcOffset)) {
            return false;
        }

        SkVector vec;
        ctx.ctm().mapVectors(&vec, &fOffset, 1);

        offset->fX = srcOffset.fX + SkScalarRoundToInt(vec.fX);
        offset->fY = srcOffset.fY + SkScalarRoundToInt(vec.fY);
        *result = src;
    } else {
        if (!this->filterInput(0, proxy, source, ctx, &src, &srcOffset)) {
            return false;
        }

        SkIRect bounds;
        if (!this->applyCropRect(ctx, src, srcOffset, &bounds)) {
            return false;
        }

        SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
        if (nullptr == device.get()) {
            return false;
        }
        SkCanvas canvas(device);
        SkPaint paint;
        paint.setXfermodeMode(SkXfermode::kSrc_Mode);
        canvas.translate(SkIntToScalar(srcOffset.fX - bounds.fLeft),
                         SkIntToScalar(srcOffset.fY - bounds.fTop));
        SkVector vec;
        ctx.ctm().mapVectors(&vec, &fOffset, 1);
        canvas.drawBitmap(src, vec.x(), vec.y(), &paint);
        *result = device->accessBitmap(false);
        offset->fX = bounds.fLeft;
        offset->fY = bounds.fTop;
    }
    return true;
}

bool SkBlurImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx,
                                       SkBitmap* result, SkIPoint* offset) const {
#if SK_SUPPORT_GPU
    SkBitmap input = src;
    SkIPoint srcOffset = SkIPoint::Make(0, 0);
    if (!this->filterInputGPU(0, proxy, src, ctx, &input, &srcOffset)) {
        return false;
    }
    SkIRect srcBounds, dstBounds;
    if (!this->applyCropRect(this->mapContext(ctx), input, srcOffset, &dstBounds, &srcBounds)) {
        return false;
    }
    if (!srcBounds.intersect(dstBounds)) {
        return false;
    }
    GrTexture* source = input.getTexture();
    SkVector sigma = mapSigma(fSigma, ctx.ctm());
    offset->fX = dstBounds.fLeft;
    offset->fY = dstBounds.fTop;
    srcBounds.offset(-srcOffset);
    dstBounds.offset(-srcOffset);
    SkRect srcBoundsF(SkRect::Make(srcBounds));
    auto constraint = GrTextureProvider::FromImageFilter(ctx.sizeConstraint());
    SkAutoTUnref<GrTexture> tex(SkGpuBlurUtils::GaussianBlur(source->getContext(),
                                                             source,
                                                             false,
                                                             SkRect::Make(dstBounds),
                                                             &srcBoundsF,
                                                             sigma.x(),
                                                             sigma.y(),
                                                             constraint));
    if (!tex) {
        return false;
    }
    WrapTexture(tex, dstBounds.width(), dstBounds.height(), result);
    return true;
#else
    SkDEBUGFAIL("Should not call in GPU-less build");
    return false;
#endif
}

bool SkOffsetImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& source,
                                        const Context& ctx,
                                        SkBitmap* result,
                                        SkIPoint* offset) const {
    SkImageFilter* input = getInput(0);
    SkBitmap src = source;
    SkIPoint srcOffset = SkIPoint::Make(0, 0);
#ifdef SK_DISABLE_OFFSETIMAGEFILTER_OPTIMIZATION
    if (false) {
#else
    if (!cropRectIsSet()) {
#endif
        if (input && !input->filterImage(proxy, source, ctx, &src, &srcOffset)) {
            return false;
        }

        SkVector vec;
        ctx.ctm().mapVectors(&vec, &fOffset, 1);

        offset->fX = srcOffset.fX + SkScalarRoundToInt(vec.fX);
        offset->fY = srcOffset.fY + SkScalarRoundToInt(vec.fY);
        *result = src;
    } else {
        if (input && !input->filterImage(proxy, source, ctx, &src, &srcOffset)) {
            return false;
        }

        SkIRect bounds;
        if (!this->applyCropRect(ctx, src, srcOffset, &bounds)) {
            return false;
        }

        SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
        if (NULL == device.get()) {
            return false;
        }
        SkCanvas canvas(device);
        SkPaint paint;
        paint.setXfermodeMode(SkXfermode::kSrc_Mode);
        canvas.translate(SkIntToScalar(srcOffset.fX - bounds.fLeft),
                         SkIntToScalar(srcOffset.fY - bounds.fTop));
        SkVector vec;
        ctx.ctm().mapVectors(&vec, &fOffset, 1);
        canvas.drawBitmap(src, vec.x(), vec.y(), &paint);
        *result = device->accessBitmap(false);
        offset->fX = bounds.fLeft;
        offset->fY = bounds.fTop;
    }
    return true;
}

void SkOffsetImageFilter::computeFastBounds(const SkRect& src, SkRect* dst) const {
    if (getInput(0)) {
        getInput(0)->computeFastBounds(src, dst);
    } else {
        *dst = src;
    }
    SkRect copy = *dst;
    dst->offset(fOffset.fX, fOffset.fY);
    dst->join(copy);
}

bool SkOffsetImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
                                         SkIRect* dst) const {
    SkVector vec;
    ctm.mapVectors(&vec, &fOffset, 1);

    SkIRect bounds = src;
    bounds.offset(-SkScalarCeilToInt(vec.fX), -SkScalarCeilToInt(vec.fY));
    bounds.join(src);
    if (getInput(0)) {
        return getInput(0)->filterBounds(bounds, ctm, dst);
    }
    *dst = bounds;
    return true;
}

bool SkBlurImageFilter::onFilterImage(Proxy* proxy,
                                      const SkBitmap& source, const Context& ctx,
                                      SkBitmap* dst, SkIPoint* offset) const {
    SkBitmap src = source;
    SkIPoint srcOffset = SkIPoint::Make(0, 0);
    if (getInput(0) && !getInput(0)->filterImage(proxy, source, ctx, &src, &srcOffset)) {
        return false;
    }

    if (src.colorType() != kN32_SkColorType) {
        return false;
    }

    SkIRect srcBounds, dstBounds;
    if (!this->applyCropRect(ctx, proxy, src, &srcOffset, &srcBounds, &src)) {
        return false;
    }

    SkAutoLockPixels alp(src);
    if (!src.getPixels()) {
        return false;
    }

    if (!dst->allocPixels(src.info().makeWH(srcBounds.width(), srcBounds.height()))) {
        return false;
    }
    dst->getBounds(&dstBounds);

    SkVector sigma = SkVector::Make(fSigma.width(), fSigma.height());
    ctx.ctm().mapVectors(&sigma, 1);
    sigma.fX = SkMinScalar(sigma.fX, MAX_SIGMA);
    sigma.fY = SkMinScalar(sigma.fY, MAX_SIGMA);

    int kernelSizeX, kernelSizeX3, lowOffsetX, highOffsetX;
    int kernelSizeY, kernelSizeY3, lowOffsetY, highOffsetY;
    getBox3Params(sigma.x(), &kernelSizeX, &kernelSizeX3, &lowOffsetX, &highOffsetX);
    getBox3Params(sigma.y(), &kernelSizeY, &kernelSizeY3, &lowOffsetY, &highOffsetY);

    if (kernelSizeX < 0 || kernelSizeY < 0) {
        return false;
    }

    if (kernelSizeX == 0 && kernelSizeY == 0) {
        src.copyTo(dst, dst->colorType());
        offset->fX = srcBounds.fLeft;
        offset->fY = srcBounds.fTop;
        return true;
    }

    SkBitmap temp;
    if (!temp.allocPixels(dst->info())) {
        return false;
    }

    offset->fX = srcBounds.fLeft;
    offset->fY = srcBounds.fTop;
    srcBounds.offset(-srcOffset);
    const SkPMColor* s = src.getAddr32(srcBounds.left(), srcBounds.top());
    SkPMColor* t = temp.getAddr32(0, 0);
    SkPMColor* d = dst->getAddr32(0, 0);
    int w = dstBounds.width(), h = dstBounds.height();
    int sw = src.rowBytesAsPixels();
    SkBoxBlurProc boxBlurX, boxBlurY, boxBlurXY, boxBlurYX;
    if (!SkBoxBlurGetPlatformProcs(&boxBlurX, &boxBlurY, &boxBlurXY, &boxBlurYX)) {
        boxBlurX = boxBlur<kX, kX>;
        boxBlurY = boxBlur<kY, kY>;
        boxBlurXY = boxBlur<kX, kY>;
        boxBlurYX = boxBlur<kY, kX>;
    }

    if (kernelSizeX > 0 && kernelSizeY > 0) {
        boxBlurX(s,  sw, t, kernelSizeX,  lowOffsetX,  highOffsetX, w, h);
        boxBlurX(t,  w,  d, kernelSizeX,  highOffsetX, lowOffsetX,  w, h);
        boxBlurXY(d, w,  t, kernelSizeX3, highOffsetX, highOffsetX, w, h);
        boxBlurX(t,  h,  d, kernelSizeY,  lowOffsetY,  highOffsetY, h, w);
        boxBlurX(d,  h,  t, kernelSizeY,  highOffsetY, lowOffsetY,  h, w);
        boxBlurXY(t, h,  d, kernelSizeY3, highOffsetY, highOffsetY, h, w);
    } else if (kernelSizeX > 0) {
        boxBlurX(s,  sw, d, kernelSizeX,  lowOffsetX,  highOffsetX, w, h);
        boxBlurX(d,  w,  t, kernelSizeX,  highOffsetX, lowOffsetX,  w, h);
        boxBlurX(t,  w,  d, kernelSizeX3, highOffsetX, highOffsetX, w, h);
    } else if (kernelSizeY > 0) {
        boxBlurYX(s, sw, d, kernelSizeY,  lowOffsetY,  highOffsetY, h, w);
        boxBlurX(d,  h,  t, kernelSizeY,  highOffsetY, lowOffsetY,  h, w);
        boxBlurXY(t, h,  d, kernelSizeY3, highOffsetY, highOffsetY, h, w);
    }
    return true;
}

sk_sp<SkSpecialImage> SkBlurImageFilter::onFilterImage(SkSpecialImage* source,
                                                       const Context& ctx,
                                                       SkIPoint* offset) const {
    SkIPoint inputOffset = SkIPoint::Make(0, 0);

    sk_sp<SkSpecialImage> input(this->filterInput(0, source, ctx, &inputOffset));
    if (!input) {
        return nullptr;
    }

    SkIRect inputBounds = SkIRect::MakeXYWH(inputOffset.fX, inputOffset.fY,
                                            input->width(), input->height());

    SkIRect dstBounds;
    if (!this->applyCropRect(this->mapContext(ctx), inputBounds, &dstBounds)) {
        return nullptr;
    }
    if (!inputBounds.intersect(dstBounds)) {
        return nullptr;
    }

    const SkVector sigma = map_sigma(fSigma, ctx.ctm());

#if SK_SUPPORT_GPU
    if (input->peekTexture() && input->peekTexture()->getContext()) {
        if (0 == sigma.x() && 0 == sigma.y()) {
            offset->fX = inputBounds.x();
            offset->fY = inputBounds.y();
            return input->makeSubset(inputBounds.makeOffset(-inputOffset.x(),
                                                            -inputOffset.y()));
        }

        GrTexture* inputTexture = input->peekTexture();

        offset->fX = dstBounds.fLeft;
        offset->fY = dstBounds.fTop;
        inputBounds.offset(-inputOffset);
        dstBounds.offset(-inputOffset);
        SkRect inputBoundsF(SkRect::Make(inputBounds));
        SkAutoTUnref<GrTexture> tex(SkGpuBlurUtils::GaussianBlur(inputTexture->getContext(),
                                                                 inputTexture,
                                                                 false,
                                                                 source->props().allowSRGBInputs(),
                                                                 SkRect::Make(dstBounds),
                                                                 &inputBoundsF,
                                                                 sigma.x(),
                                                                 sigma.y()));
        if (!tex) {
            return nullptr;
        }

        return SkSpecialImage::MakeFromGpu(source->internal_getProxy(),
                                           SkIRect::MakeWH(dstBounds.width(), dstBounds.height()),
                                           kNeedNewImageUniqueID_SpecialImage,
                                           tex, &source->props());
    }
#endif

    int kernelSizeX, kernelSizeX3, lowOffsetX, highOffsetX;
    int kernelSizeY, kernelSizeY3, lowOffsetY, highOffsetY;
    get_box3_params(sigma.x(), &kernelSizeX, &kernelSizeX3, &lowOffsetX, &highOffsetX);
    get_box3_params(sigma.y(), &kernelSizeY, &kernelSizeY3, &lowOffsetY, &highOffsetY);

    if (kernelSizeX < 0 || kernelSizeY < 0) {
        return nullptr;
    }

    if (kernelSizeX == 0 && kernelSizeY == 0) {
        offset->fX = inputBounds.x();
        offset->fY = inputBounds.y();
        return input->makeSubset(inputBounds.makeOffset(-inputOffset.x(),
                                                        -inputOffset.y()));
    }

    SkPixmap inputPixmap;

    if (!input->peekPixels(&inputPixmap)) {
        return nullptr;
    }

    if (inputPixmap.colorType() != kN32_SkColorType) {
        return nullptr;
    }

    SkImageInfo info = SkImageInfo::Make(dstBounds.width(), dstBounds.height(),
                                         inputPixmap.colorType(), inputPixmap.alphaType());

    SkBitmap tmp, dst;
    if (!tmp.tryAllocPixels(info) || !dst.tryAllocPixels(info)) {
        return nullptr;
    }

    SkAutoLockPixels tmpLock(tmp), dstLock(dst);

    offset->fX = dstBounds.fLeft;
    offset->fY = dstBounds.fTop;
    SkPMColor* t = tmp.getAddr32(0, 0);
    SkPMColor* d = dst.getAddr32(0, 0);
    int w = dstBounds.width(), h = dstBounds.height();
    const SkPMColor* s = inputPixmap.addr32(inputBounds.x() - inputOffset.x(),
//.........这里部分代码省略.........

SkIRect SkBlurImageFilter::onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm,
                                              MapDirection) const {
    SkVector sigma = map_sigma(fSigma, ctm);
    return src.makeOutset(SkScalarCeilToInt(SkScalarMul(sigma.x(), SkIntToScalar(3))),
                          SkScalarCeilToInt(SkScalarMul(sigma.y(), SkIntToScalar(3))));
}

bool SkBlurImageFilter::onFilterImage(Proxy* proxy,
                                      const SkBitmap& source, const Context& ctx,
                                      SkBitmap* dst, SkIPoint* offset) const {
    SkBitmap src = source;
    SkIPoint srcOffset = SkIPoint::Make(0, 0);
    if (!this->filterInput(0, proxy, source, ctx, &src, &srcOffset)) {
        return false;
    }

    if (src.colorType() != kN32_SkColorType) {
        return false;
    }

    SkIRect srcBounds, dstBounds;
    if (!this->applyCropRect(this->mapContext(ctx), src, srcOffset, &dstBounds, &srcBounds)) {
        return false;
    }
    if (!srcBounds.intersect(dstBounds)) {
        return false;
    }

    SkAutoLockPixels alp(src);
    if (!src.getPixels()) {
        return false;
    }

    SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(dstBounds.width(), dstBounds.height()));
    if (!device) {
        return false;
    }
    *dst = device->accessBitmap(false);
    SkAutoLockPixels alp_dst(*dst);

    SkVector sigma = mapSigma(fSigma, ctx.ctm());

    int kernelSizeX, kernelSizeX3, lowOffsetX, highOffsetX;
    int kernelSizeY, kernelSizeY3, lowOffsetY, highOffsetY;
    getBox3Params(sigma.x(), &kernelSizeX, &kernelSizeX3, &lowOffsetX, &highOffsetX);
    getBox3Params(sigma.y(), &kernelSizeY, &kernelSizeY3, &lowOffsetY, &highOffsetY);

    if (kernelSizeX < 0 || kernelSizeY < 0) {
        return false;
    }

    if (kernelSizeX == 0 && kernelSizeY == 0) {
        src.copyTo(dst, dst->colorType());
        offset->fX = dstBounds.x() + srcOffset.x();
        offset->fY = dstBounds.y() + srcOffset.y();
        return true;
    }

    SkAutoTUnref<SkBaseDevice> tempDevice(proxy->createDevice(dst->width(), dst->height()));
    if (!tempDevice) {
        return false;
    }
    SkBitmap temp = tempDevice->accessBitmap(false);
    SkAutoLockPixels alpTemp(temp);

    offset->fX = dstBounds.fLeft;
    offset->fY = dstBounds.fTop;
    SkPMColor* t = temp.getAddr32(0, 0);
    SkPMColor* d = dst->getAddr32(0, 0);
    int w = dstBounds.width(), h = dstBounds.height();
    const SkPMColor* s = src.getAddr32(srcBounds.x() - srcOffset.x(), srcBounds.y() - srcOffset.y());
    srcBounds.offset(-dstBounds.x(), -dstBounds.y());
    dstBounds.offset(-dstBounds.x(), -dstBounds.y());
    SkIRect srcBoundsT = SkIRect::MakeLTRB(srcBounds.top(), srcBounds.left(), srcBounds.bottom(), srcBounds.right());
    SkIRect dstBoundsT = SkIRect::MakeWH(dstBounds.height(), dstBounds.width());
    int sw = src.rowBytesAsPixels();

    /**
     *
     * In order to make memory accesses cache-friendly, we reorder the passes to
     * use contiguous memory reads wherever possible.
     *
     * For example, the 6 passes of the X-and-Y blur case are rewritten as
     * follows. Instead of 3 passes in X and 3 passes in Y, we perform
     * 2 passes in X, 1 pass in X transposed to Y on write, 2 passes in X,
     * then 1 pass in X transposed to Y on write.
     *
     * +----+       +----+       +----+        +---+       +---+       +---+        +----+
     * + AB + ----> | AB | ----> | AB | -----> | A | ----> | A | ----> | A | -----> | AB |
     * +----+ blurX +----+ blurX +----+ blurXY | B | blurX | B | blurX | B | blurXY +----+
     *                                         +---+       +---+       +---+
     *
     * In this way, two of the y-blurs become x-blurs applied to transposed
     * images, and all memory reads are contiguous.
     */
    if (kernelSizeX > 0 && kernelSizeY > 0) {
        SkOpts::box_blur_xx(s, sw,  srcBounds,  t, kernelSizeX,  lowOffsetX,  highOffsetX, w, h);
        SkOpts::box_blur_xx(t,  w,  dstBounds,  d, kernelSizeX,  highOffsetX, lowOffsetX,  w, h);
        SkOpts::box_blur_xy(d,  w,  dstBounds,  t, kernelSizeX3, highOffsetX, highOffsetX, w, h);
        SkOpts::box_blur_xx(t,  h,  dstBoundsT, d, kernelSizeY,  lowOffsetY,  highOffsetY, h, w);
        SkOpts::box_blur_xx(d,  h,  dstBoundsT, t, kernelSizeY,  highOffsetY, lowOffsetY,  h, w);
        SkOpts::box_blur_xy(t,  h,  dstBoundsT, d, kernelSizeY3, highOffsetY, highOffsetY, h, w);
    } else if (kernelSizeX > 0) {
        SkOpts::box_blur_xx(s, sw,  srcBounds,  d, kernelSizeX,  lowOffsetX,  highOffsetX, w, h);
        SkOpts::box_blur_xx(d,  w,  dstBounds,  t, kernelSizeX,  highOffsetX, lowOffsetX,  w, h);
        SkOpts::box_blur_xx(t,  w,  dstBounds,  d, kernelSizeX3, highOffsetX, highOffsetX, w, h);
    } else if (kernelSizeY > 0) {
//.........这里部分代码省略.........

void GrTextBlob::flush(GrTextTarget* target, const SkSurfaceProps& props,
                       const GrDistanceFieldAdjustTable* distanceAdjustTable,
                       const SkPaint& paint, GrColor filteredColor, const GrClip& clip,
                       const SkMatrix& viewMatrix, SkScalar x, SkScalar y) {

    // GrTextBlob::makeOp only takes uint16_t values for run and subRun indices.
    // Encountering something larger than this is highly unlikely, so we'll just not draw it.
    int lastRun = SkTMin(fRunCount, (1 << 16)) - 1;
    // For each run in the GrTextBlob we're going to churn through all the glyphs.
    // Each run is broken into a path part and a Mask / DFT / ARGB part.
    for (int runIndex = 0; runIndex <= lastRun; runIndex++) {

        Run& run = fRuns[runIndex];

        // first flush any path glyphs
        if (run.fPathGlyphs.count()) {
            SkPaint runPaint{paint};
            runPaint.setFlags((runPaint.getFlags() & ~Run::kPaintFlagsMask) | run.fPaintFlags);

            for (int i = 0; i < run.fPathGlyphs.count(); i++) {
                GrTextBlob::Run::PathGlyph& pathGlyph = run.fPathGlyphs[i];

                SkMatrix ctm;
                const SkPath* path = &pathGlyph.fPath;

                // TmpPath must be in the same scope as GrShape shape below.
                SkTLazy<SkPath> tmpPath;

                // The glyph positions and glyph outlines are either in device space or in source
                // space based on fPreTransformed.
                if (!pathGlyph.fPreTransformed) {
                    // Positions and outlines are in source space.

                    ctm = viewMatrix;

                    SkMatrix pathMatrix = SkMatrix::MakeScale(pathGlyph.fScale, pathGlyph.fScale);

                    // The origin for the blob may have changed, so figure out the delta.
                    SkVector originShift = SkPoint{x, y} - SkPoint{fInitialX, fInitialY};

                    // Shift the original glyph location in source space to the position of the new
                    // blob.
                    pathMatrix.postTranslate(originShift.x() + pathGlyph.fX,
                                             originShift.y() + pathGlyph.fY);

                    // If there are shaders, blurs or styles, the path must be scaled into source
                    // space independently of the CTM. This allows the CTM to be correct for the
                    // different effects.
                    GrStyle style(runPaint);
                    bool scalePath = runPaint.getShader()
                                     || style.applies()
                                     || runPaint.getMaskFilter();
                    if (!scalePath) {
                        // Scale can be applied to CTM -- no effects.

                        ctm.preConcat(pathMatrix);
                    } else {
                        // Scale the outline into source space.

                        // Transform the path form the normalized outline to source space. This
                        // way the CTM will remain the same so it can be used by the effects.
                        SkPath* sourceOutline = tmpPath.init();
                        path->transform(pathMatrix, sourceOutline);
                        sourceOutline->setIsVolatile(true);
                        path = sourceOutline;
                    }


                } else {
                    // Positions and outlines are in device space.

                    SkPoint originalOrigin = {fInitialX, fInitialY};
                    fInitialViewMatrix.mapPoints(&originalOrigin, 1);

                    SkPoint newOrigin = {x, y};
                    viewMatrix.mapPoints(&newOrigin, 1);

                    // The origin shift in device space.
                    SkPoint originShift = newOrigin - originalOrigin;

                    // Shift the original glyph location in device space to the position of the
                    // new blob.
                    ctm = SkMatrix::MakeTrans(originShift.x() + pathGlyph.fX,
                                              originShift.y() + pathGlyph.fY);
                }

                // TODO: we are losing the mutability of the path here
                GrShape shape(*path, paint);

                target->drawShape(clip, runPaint, ctm, shape);
            }
        }

        // then flush each subrun, if any
        if (!run.fInitialized) {
            continue;
        }

        int lastSubRun = SkTMin(run.fSubRunInfo.count(), 1 << 16) - 1;
        for (int subRun = 0; subRun <= lastSubRun; subRun++) {
//.........这里部分代码省略.........