1 #define INKSCAPE_LPEGROUPBBOX_CPP
3 /*
4 * Copyright (C) Steren Giannini 2008 <steren.giannini@gmail.com>
5 *
6 * Released under GNU GPL, read the file 'COPYING' for more information
7 */
9 #include "live_effects/lpegroupbbox.h"
11 #include "sp-item.h"
13 namespace Inkscape {
14 namespace LivePathEffect {
16 /**
17 * \brief Updates the \c boundingbox_X and \c boundingbox_Y values from the geometric bounding box of \c lpeitem.
18 *
19 * \pre lpeitem must have an existing geometric boundingbox (usually this is guaranteed when: \code SP_SHAPE(lpeitem)->curve != NULL \endcode )
20 It's not possible to run LPEs on items without their original-d having a bbox.
21 * \param lpeitem This is not allowed to be NULL.
22 * \param absolute Determines whether the bbox should be calculated of the untransformed lpeitem (\c absolute = \c false)
23 * or of the transformed lpeitem (\c absolute = \c true) using sp_item_i2doc_affine.
24 * \post Updated values of boundingbox_X and boundingbox_Y. These intervals are set to empty intervals when the precondition is not met.
25 */
26 void
27 GroupBBoxEffect::original_bbox(SPLPEItem *lpeitem, bool absolute)
28 {
29 // Get item bounding box
30 SPItem* item = SP_ITEM(lpeitem);
32 Geom::Matrix transform;
33 if (absolute) {
34 transform = sp_item_i2doc_affine(item);
35 }
36 else {
37 transform = Geom::identity();
38 }
40 Geom::OptRect bbox = item->getBounds(transform, SPItem::GEOMETRIC_BBOX);
41 if (bbox) {
42 boundingbox_X = (*bbox)[Geom::X];
43 boundingbox_Y = (*bbox)[Geom::Y];
44 } else {
45 boundingbox_X = Geom::Interval();
46 boundingbox_Y = Geom::Interval();
47 }
48 }
50 } // namespace LivePathEffect
51 } /* namespace Inkscape */
53 /*
54 Local Variables:
55 mode:c++
56 c-file-style:"stroustrup"
57 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
58 indent-tabs-mode:nil
59 fill-column:99
60 End:
61 */
62 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :