C++ geom::OptRect类代码示例

static void sp_canvas_bpath_update(SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags)
{
    SPCanvasBPath *cbp = SP_CANVAS_BPATH(item);

    item->canvas->requestRedraw((int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);

    if (reinterpret_cast<SPCanvasItemClass *>(sp_canvas_bpath_parent_class)->update) {
        reinterpret_cast<SPCanvasItemClass *>(sp_canvas_bpath_parent_class)->update(item, affine, flags);
    }

    sp_canvas_item_reset_bounds (item);

    if (!cbp->curve) return;

    cbp->affine = affine;

    Geom::OptRect bbox = bounds_exact_transformed(cbp->curve->get_pathvector(), affine);

    if (bbox) {
        item->x1 = (int)bbox->min()[Geom::X] - 1;
        item->y1 = (int)bbox->min()[Geom::Y] - 1;
        item->x2 = (int)bbox->max()[Geom::X] + 1;
        item->y2 = (int)bbox->max()[Geom::Y] + 1;
    } else {
        item->x1 = 0;
        item->y1 = 0;
        item->x2 = 0;
        item->y2 = 0;
    }
    item->canvas->requestRedraw((int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
}

Geom::OptRect SPTRef::bbox(Geom::Affine const &transform, SPItem::BBoxType type) const {
    Geom::OptRect bbox;
    // find out the ancestor text which holds our layout
    SPObject const *parent_text = this;

    while ( parent_text && !SP_IS_TEXT(parent_text) ) {
        parent_text = parent_text->parent;
    }

    if (parent_text == NULL) {
        return bbox;
    }

    // get the bbox of our portion of the layout
    bbox = SP_TEXT(parent_text)->layout.bounds(transform,
        sp_text_get_length_upto(parent_text, this), sp_text_get_length_upto(this, NULL) - 1);

    // Add stroke width
    // FIXME this code is incorrect
    if (bbox && type == SPItem::VISUAL_BBOX && !this->style->stroke.isNone()) {
        double scale = transform.descrim();
        bbox->expandBy(0.5 * this->style->stroke_width.computed * scale);
    }

    return bbox;
}

Geom::Point SPAvoidRef::getConnectionPointPos()
{
    g_assert(item);
    // the center is all we are interested in now; we used to care
    // about non-center points, but that's moot.
    Geom::OptRect bbox = item->documentVisualBounds();
    return (bbox) ? bbox->midpoint() : Geom::Point(0, 0);
}

Geom::OptRect Selection::visualBounds() const
{
    std::vector<SPItem*> const items = const_cast<Selection *>(this)->itemList();

    Geom::OptRect bbox;
    for ( std::vector<SPItem*>::const_iterator iter=items.begin();iter!=items.end(); ++iter) {
        bbox.unionWith(SP_ITEM(*iter)->desktopVisualBounds());
    }
    return bbox;
}

Geom::OptRect SPFlowtext::bbox(Geom::Affine const &transform, SPItem::BBoxType type) const {
    Geom::OptRect bbox = this->layout.bounds(transform);

    // Add stroke width
    // FIXME this code is incorrect
    if (bbox && type == SPItem::VISUAL_BBOX && !this->style->stroke.isNone()) {
        double scale = transform.descrim();
        bbox->expandBy(0.5 * this->style->stroke_width.computed * scale);
    }

    return bbox;
}

Geom::OptRect SPClipPath::geometricBounds(Geom::Affine const &transform) {
    Geom::OptRect bbox;

    for (SPObject *i = firstChild(); i; i = i->getNext()) {
        if (SP_IS_ITEM(i)) {
        	Geom::OptRect tmp = SP_ITEM(i)->geometricBounds(Geom::Affine(SP_ITEM(i)->transform) * transform);
			bbox.unionWith(tmp);
        }
    }

    return bbox;
}

// If we have a selection of multiple items, then the center of the first item
// will be returned; this is also the case in SelTrans::centerRequest()
boost::optional<Geom::Point> Selection::center() const {
    std::vector<SPItem*> const items = const_cast<Selection *>(this)->itemList();
    if (!items.empty()) {
        SPItem *first = items.back(); // from the first item in selection
        if (first->isCenterSet()) { // only if set explicitly
            return first->getCenter();
        }
    }
    Geom::OptRect bbox = preferredBounds();
    if (bbox) {
        return bbox->midpoint();
    } else {
        return boost::optional<Geom::Point>();
    }
}

static void
sp_selection_layout_widget_update(SPWidget *spw, Inkscape::Selection *sel)
{
    if (g_object_get_data(G_OBJECT(spw), "update")) {
        return;
    }

    g_object_set_data(G_OBJECT(spw), "update", GINT_TO_POINTER(TRUE));

    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
    using Geom::X;
    using Geom::Y;
    if ( sel && !sel->isEmpty() ) {
        int prefs_bbox = prefs->getInt("/tools/bounding_box", 0);
        SPItem::BBoxType bbox_type = (prefs_bbox ==0)?
            SPItem::VISUAL_BBOX : SPItem::GEOMETRIC_BBOX;
        Geom::OptRect const bbox(sel->bounds(bbox_type));
        if ( bbox ) {
            UnitTracker *tracker = reinterpret_cast<UnitTracker*>(g_object_get_data(G_OBJECT(spw), "tracker"));
            Unit const *unit = tracker->getActiveUnit();
            g_return_if_fail(unit != NULL);

            struct { char const *key; double val; } const keyval[] = {
                { "X", bbox->min()[X] },
                { "Y", bbox->min()[Y] },
                { "width", bbox->dimensions()[X] },
                { "height", bbox->dimensions()[Y] }
            };

            if (unit->type == Inkscape::Util::UNIT_TYPE_DIMENSIONLESS) {
                double const val = unit->factor * 100;
                for (unsigned i = 0; i < G_N_ELEMENTS(keyval); ++i) {
                    GtkAdjustment *a = GTK_ADJUSTMENT(g_object_get_data(G_OBJECT(spw), keyval[i].key));
                    gtk_adjustment_set_value(a, val);
                    tracker->setFullVal( a, keyval[i].val );
                }
            } else {
                for (unsigned i = 0; i < G_N_ELEMENTS(keyval); ++i) {
                    GtkAdjustment *a = GTK_ADJUSTMENT(g_object_get_data(G_OBJECT(spw), keyval[i].key));
                    gtk_adjustment_set_value(a, Quantity::convert(keyval[i].val, "px", unit));
                }
            }
        }
    }

    g_object_set_data(G_OBJECT(spw), "update", GINT_TO_POINTER(FALSE));
}

/**
Center of bbox of item
*/
static Geom::Point
unclump_center (SPItem *item)
{
    std::map<const gchar *, Geom::Point>::iterator i = c_cache.find(item->getId());
    if ( i != c_cache.end() ) {
        return i->second;
    }

    Geom::OptRect r = item->desktopVisualBounds();
    if (r) {
        Geom::Point const c = r->midpoint();
        c_cache[item->getId()] = c;
        return c;
    } else {
        // FIXME
        return Geom::Point(0, 0);
    }
}

static Geom::Point
unclump_wh (SPItem *item)
{
    Geom::Point wh;
    std::map<const gchar *, Geom::Point>::iterator i = wh_cache.find(item->getId());
    if ( i != wh_cache.end() ) {
        wh = i->second;
    } else {
        Geom::OptRect r = item->desktopVisualBounds();
        if (r) {
            wh = r->dimensions();
            wh_cache[item->getId()] = wh;
        } else {
            wh = Geom::Point(0, 0);
        }
    }

    return wh;
}

SPItem *Selection::_sizeistItem(bool sml, Selection::CompareSize compare) {
    std::vector<SPItem*> const items = const_cast<Selection *>(this)->itemList();
    gdouble max = sml ? 1e18 : 0;
    SPItem *ist = NULL;

    for ( std::vector<SPItem*>::const_iterator i=items.begin();i!=items.end(); ++i) {
        Geom::OptRect obox = SP_ITEM(*i)->desktopPreferredBounds();
        if (!obox || obox.isEmpty()) continue;
        Geom::Rect bbox = *obox;

        gdouble size = compare == 2 ? bbox.area() :
            (compare == 1 ? bbox.width() : bbox.height());
        size = sml ? size : size * -1;
        if (size < max) {
            max = size;
            ist = SP_ITEM(*i);
        }
    }
    return ist;
}

void sp_textpath_to_text(SPObject *tp)
{
    SPObject *text = tp->parent;

    Geom::OptRect bbox = SP_ITEM(text)->geometricBounds(SP_ITEM(text)->i2doc_affine());

    if (!bbox) {
    	return;
    }

    Geom::Point xy = bbox->min();
    xy *= tp->document->getDocumentScale().inverse(); // Convert to user-units.
    
    // make a list of textpath children
    GSList *tp_reprs = NULL;

    for (SPObject *o = tp->firstChild() ; o != NULL; o = o->next) {
        tp_reprs = g_slist_prepend(tp_reprs, o->getRepr());
    }

    for ( GSList *i = tp_reprs ; i ; i = i->next ) {
        // make a copy of each textpath child
        Inkscape::XML::Node *copy = ((Inkscape::XML::Node *) i->data)->duplicate(text->getRepr()->document());
        // remove the old repr from under textpath
        tp->getRepr()->removeChild((Inkscape::XML::Node *) i->data);
        // put its copy under text
        text->getRepr()->addChild(copy, NULL); // fixme: copy id
    }

    //remove textpath
    tp->deleteObject();
    g_slist_free(tp_reprs);

    // set x/y on text (to be near where it was when on path)
    /* fixme: Yuck, is this really the right test? */
    if (xy[Geom::X] != 1e18 && xy[Geom::Y] != 1e18) {
        sp_repr_set_svg_double(text->getRepr(), "x", xy[Geom::X]);
        sp_repr_set_svg_double(text->getRepr(), "y", xy[Geom::Y]);
    }
}

void Inkscape::getBBoxPoints(Geom::OptRect const bbox,
                             std::vector<SnapCandidatePoint> *points,
                             bool const /*isTarget*/,
                             bool const includeCorners,
                             bool const includeLineMidpoints,
                             bool const includeObjectMidpoints)
{
    if (bbox) {
        // collect the corners of the bounding box
        for ( unsigned k = 0 ; k < 4 ; k++ ) {
            if (includeCorners) {
                points->push_back(SnapCandidatePoint(bbox->corner(k), SNAPSOURCE_BBOX_CORNER, -1, SNAPTARGET_BBOX_CORNER, *bbox));
            }
            // optionally, collect the midpoints of the bounding box's edges too
            if (includeLineMidpoints) {
                points->push_back(SnapCandidatePoint((bbox->corner(k) + bbox->corner((k+1) % 4))/2, SNAPSOURCE_BBOX_EDGE_MIDPOINT, -1, SNAPTARGET_BBOX_EDGE_MIDPOINT, *bbox));
            }
        }
        if (includeObjectMidpoints) {
            points->push_back(SnapCandidatePoint(bbox->midpoint(), SNAPSOURCE_BBOX_MIDPOINT, -1, SNAPTARGET_BBOX_MIDPOINT, *bbox));
        }
    }
}

void
sp_gradient_pattern_common_setup(cairo_pattern_t *cp,
                                 SPGradient *gr,
                                 Geom::OptRect const &bbox,
                                 double opacity)
{
    // set spread type
    switch (gr->getSpread()) {
    case SP_GRADIENT_SPREAD_REFLECT:
        cairo_pattern_set_extend(cp, CAIRO_EXTEND_REFLECT);
        break;
    case SP_GRADIENT_SPREAD_REPEAT:
        cairo_pattern_set_extend(cp, CAIRO_EXTEND_REPEAT);
        break;
    case SP_GRADIENT_SPREAD_PAD:
    default:
        cairo_pattern_set_extend(cp, CAIRO_EXTEND_PAD);
        break;
    }

    // add stops
    for (std::vector<SPGradientStop>::iterator i = gr->vector.stops.begin();
         i != gr->vector.stops.end(); ++i)
    {
        // multiply stop opacity by paint opacity
        cairo_pattern_add_color_stop_rgba(cp, i->offset,
            i->color.v.c[0], i->color.v.c[1], i->color.v.c[2], i->opacity * opacity);
    }

    // set pattern matrix
    Geom::Affine gs2user = gr->gradientTransform;
    if (gr->getUnits() == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX && bbox) {
        Geom::Affine bbox2user(bbox->width(), 0, 0, bbox->height(), bbox->left(), bbox->top());
        gs2user *= bbox2user;
    }
    ink_cairo_pattern_set_matrix(cp, gs2user.inverse());
}

/** Feeds path-creating calls to the cairo context translating them from the Path, with the given transform and shift */
static void
feed_path_to_cairo (cairo_t *ct, Geom::Path const &path, Geom::Affine trans, Geom::OptRect area, bool optimize_stroke, double stroke_width)
{
    if (!area)
        return;
    if (path.empty())
        return;

    // Transform all coordinates to coords within "area"
    Geom::Point shift = area->min();
    Geom::Rect view = *area;
    view.expandBy (stroke_width);
    view = view * (Geom::Affine)Geom::Translate(-shift);
    //  Pass transformation to feed_curve, so that we don't need to create a whole new path.
    Geom::Affine transshift(trans * Geom::Translate(-shift));

    Geom::Point initial = path.initialPoint() * transshift;
    cairo_move_to(ct, initial[0], initial[1] );

    for(Geom::Path::const_iterator cit = path.begin(); cit != path.end_open(); ++cit) {
        feed_curve_to_cairo(ct, *cit, transshift, view, optimize_stroke);
    }

    if (path.closed()) {
        if (!optimize_stroke) {
            cairo_close_path(ct);
        } else {
            cairo_line_to(ct, initial[0], initial[1]);
            /* We cannot use cairo_close_path(ct) here because some parts of the path may have been
               clipped and not drawn (maybe the before last segment was outside view area), which 
               would result in closing the "subpath" after the last interruption, not the entire path.

               However, according to cairo documentation:
               The behavior of cairo_close_path() is distinct from simply calling cairo_line_to() with the equivalent coordinate
               in the case of stroking. When a closed sub-path is stroked, there are no caps on the ends of the sub-path. Instead,
               there is a line join connecting the final and initial segments of the sub-path. 

               The correct fix will be possible when cairo introduces methods for moving without
               ending/starting subpaths, which we will use for skipping invisible segments; then we
               will be able to use cairo_close_path here. This issue also affects ps/eps/pdf export,
               see bug 168129
            */
        }
    }
}