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Diffstat (limited to '')
-rw-r--r-- | src/display/sp-canvas-util.cpp | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/src/display/sp-canvas-util.cpp b/src/display/sp-canvas-util.cpp new file mode 100644 index 0000000..dee7d8d --- /dev/null +++ b/src/display/sp-canvas-util.cpp @@ -0,0 +1,111 @@ +// 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 : |