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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Helper stuff for SPCanvas
*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
* Jon A. Cruz <jon@joncruz.org>
*
* Copyright (C) 1999-2002 authors
* Copyright (C) 2001-2002 Ximian, Inc.
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include <2geom/affine.h>
#include "sp-canvas-util.h"
#include "sp-canvas-item.h"
#include "sp-canvas.h"
void sp_canvas_update_bbox(SPCanvasItem *item, int x1, int y1, int x2, int y2)
{
item->canvas->requestRedraw((int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
item->x1 = x1;
item->y1 = y1;
item->x2 = x2;
item->y2 = y2;
item->canvas->requestRedraw((int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
}
void
sp_canvas_item_reset_bounds (SPCanvasItem *item)
{
item->x1 = 0.0;
item->y1 = 0.0;
item->x2 = 0.0;
item->y2 = 0.0;
}
void sp_canvas_prepare_buffer(SPCanvasBuf *)
{
}
Geom::Affine sp_canvas_item_i2p_affine (SPCanvasItem * item)
{
g_assert (item != nullptr); /* this may be overly zealous - it is
* plausible that this gets called
* with item == 0. */
return item->xform;
}
Geom::Affine sp_canvas_item_i2i_affine (SPCanvasItem * from, SPCanvasItem * to)
{
g_assert (from != nullptr);
g_assert (to != nullptr);
return sp_canvas_item_i2w_affine(from) * sp_canvas_item_i2w_affine(to).inverse();
}
void sp_canvas_item_set_i2w_affine (SPCanvasItem * item, Geom::Affine const &i2w)
{
g_assert (item != nullptr);
sp_canvas_item_affine_absolute(item, i2w * sp_canvas_item_i2w_affine(item->parent).inverse());
}
void sp_canvas_item_move_to_z (SPCanvasItem * item, gint z)
{
g_assert (item != nullptr);
if (z == 0)
return sp_canvas_item_lower_to_bottom(item);
gint current_z = sp_canvas_item_order (item);
if (current_z == -1) // not found in its parent
return;
if (z == current_z)
return;
if (z > current_z) {
sp_canvas_item_raise (item, z - current_z);
} else {
sp_canvas_item_lower (item, current_z - z);
}
}
gint
sp_canvas_item_compare_z (SPCanvasItem * a, SPCanvasItem * b)
{
gint const o_a = sp_canvas_item_order (a);
gint const o_b = sp_canvas_item_order (b);
if (o_a > o_b) return -1;
if (o_a < o_b) return 1;
return 0;
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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