C++ SkRasterClip::getBounds方法代码示例

bool SkMaskFilterBase::filterPath(const SkPath& devPath, const SkMatrix& matrix,
                                  const SkRasterClip& clip, SkBlitter* blitter,
                                  SkStrokeRec::InitStyle style) const {
    SkRect rects[2];
    int rectCount = 0;
    if (SkStrokeRec::kFill_InitStyle == style) {
        rectCount = countNestedRects(devPath, rects);
    }
    if (rectCount > 0) {
        NinePatch patch;

        switch (this->filterRectsToNine(rects, rectCount, matrix, clip.getBounds(), &patch)) {
            case kFalse_FilterReturn:
                SkASSERT(nullptr == patch.fMask.fImage);
                return false;

            case kTrue_FilterReturn:
                draw_nine(patch.fMask, patch.fOuterRect, patch.fCenter, 1 == rectCount, clip,
                          blitter);
                return true;

            case kUnimplemented_FilterReturn:
                SkASSERT(nullptr == patch.fMask.fImage);
                // fall through
                break;
        }
    }

    SkMask  srcM, dstM;

    if (!SkDraw::DrawToMask(devPath, &clip.getBounds(), this, &matrix, &srcM,
                            SkMask::kComputeBoundsAndRenderImage_CreateMode,
                            style)) {
        return false;
    }
    SkAutoMaskFreeImage autoSrc(srcM.fImage);

    if (!this->filterMask(&dstM, srcM, matrix, nullptr)) {
        return false;
    }
    SkAutoMaskFreeImage autoDst(dstM.fImage);

    // if we get here, we need to (possibly) resolve the clip and blitter
    SkAAClipBlitterWrapper wrapper(clip, blitter);
    blitter = wrapper.getBlitter();

    SkRegion::Cliperator clipper(wrapper.getRgn(), dstM.fBounds);

    if (!clipper.done()) {
        const SkIRect& cr = clipper.rect();
        do {
            blitter->blitMask(dstM, cr);
            clipper.next();
        } while (!clipper.done());
    }

    return true;
}

bool SkRasterClip::setPath(const SkPath& path, const SkRasterClip& clip,
                           bool doAA) {
    if (clip.isBW()) {
        return this->setPath(path, clip.bwRgn(), doAA);
    } else {
        SkRegion tmp;
        tmp.setRect(clip.getBounds());
        if (!this->setPath(path, clip, doAA)) {
            return false;
        }
        return this->op(clip, SkRegion::kIntersect_Op);
    }
}

bool SkMaskFilterBase::filterRRect(const SkRRect& devRRect, const SkMatrix& matrix,
                                   const SkRasterClip& clip, SkBlitter* blitter) const {
    // Attempt to speed up drawing by creating a nine patch. If a nine patch
    // cannot be used, return false to allow our caller to recover and perform
    // the drawing another way.
    NinePatch patch;
    patch.fMask.fImage = nullptr;
    if (kTrue_FilterReturn != this->filterRRectToNine(devRRect, matrix,
                                                      clip.getBounds(),
                                                      &patch)) {
        SkASSERT(nullptr == patch.fMask.fImage);
        return false;
    }
    draw_nine(patch.fMask, patch.fOuterRect, patch.fCenter, true, clip, blitter);
    return true;
}

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);
    }
}