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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Simple bezier bpath CanvasItem for inkscape
*
* Authors:
* Lauris Kaplinski <lauris@ximian.com>
* Jon A. Cruz <jon@joncruz.org>
*
* Copyright (C) 2001 Lauris Kaplinski and Ximian, Inc.
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*
*/
#include <sstream>
#include <cstring>
#include "desktop.h"
#include "color.h"
#include "display/sp-canvas-group.h"
#include "display/sp-canvas-util.h"
#include "display/canvas-bpath.h"
#include "display/curve.h"
#include "display/cairo-utils.h"
#include "helper/geom.h"
#include "display/sp-canvas.h"
static void sp_canvas_bpath_destroy(SPCanvasItem *object);
static void sp_canvas_bpath_update (SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags);
static void sp_canvas_bpath_render (SPCanvasItem *item, SPCanvasBuf *buf);
static double sp_canvas_bpath_point (SPCanvasItem *item, Geom::Point p, SPCanvasItem **actual_item);
G_DEFINE_TYPE(SPCanvasBPath, sp_canvas_bpath, SP_TYPE_CANVAS_ITEM);
static void sp_canvas_bpath_class_init(SPCanvasBPathClass *klass)
{
SPCanvasItemClass *item_class = (SPCanvasItemClass *) klass;
item_class->destroy = sp_canvas_bpath_destroy;
item_class->update = sp_canvas_bpath_update;
item_class->render = sp_canvas_bpath_render;
item_class->point = sp_canvas_bpath_point;
}
static void
sp_canvas_bpath_init (SPCanvasBPath * bpath)
{
bpath->fill_rgba = 0x00000000;
bpath->fill_rule = SP_WIND_RULE_EVENODD;
bpath->stroke_rgba = 0x00000000;
bpath->stroke_width = 1.0;
bpath->stroke_linejoin = SP_STROKE_LINEJOIN_MITER;
bpath->stroke_linecap = SP_STROKE_LINECAP_BUTT;
bpath->stroke_miterlimit = 11.0;
bpath->phantom_line = false;
}
static void sp_canvas_bpath_destroy(SPCanvasItem *object)
{
SPCanvasBPath *cbp = SP_CANVAS_BPATH (object);
if (cbp->curve) {
cbp->curve = cbp->curve->unref();
}
if (SP_CANVAS_ITEM_CLASS(sp_canvas_bpath_parent_class)->destroy)
(* SP_CANVAS_ITEM_CLASS(sp_canvas_bpath_parent_class)->destroy) (object);
}
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 - 1, (int)item->y1 - 1, (int)item->x2 + 1 , (int)item->y2 + 1);
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)floor(bbox->min()[Geom::X]) - 1;
item->y1 = (int)floor(bbox->min()[Geom::Y]) - 1;
item->x2 = (int)ceil(bbox->max()[Geom::X]) + 1;
item->y2 = (int)ceil(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);
}
static void
sp_canvas_bpath_render (SPCanvasItem *item, SPCanvasBuf *buf)
{
SPCanvasBPath *cbp = SP_CANVAS_BPATH (item);
Geom::Rect area = buf->rect;
if ( !cbp->curve ||
((cbp->stroke_rgba & 0xff) == 0 && (cbp->fill_rgba & 0xff) == 0 ) ||
cbp->curve->get_segment_count() < 1)
return;
if (!buf->ct)
return;
bool dofill = ((cbp->fill_rgba & 0xff) != 0);
bool dostroke = ((cbp->stroke_rgba & 0xff) != 0);
cairo_set_tolerance(buf->ct, 0.5);
cairo_new_path(buf->ct);
feed_pathvector_to_cairo (buf->ct, cbp->curve->get_pathvector(), cbp->affine, area,
/* optimized_stroke = */ !dofill, 1);
if (dofill) {
// RGB / BGR
ink_cairo_set_source_rgba32(buf->ct, cbp->fill_rgba);
cairo_set_fill_rule(buf->ct, cbp->fill_rule == SP_WIND_RULE_EVENODD? CAIRO_FILL_RULE_EVEN_ODD
: CAIRO_FILL_RULE_WINDING);
cairo_fill_preserve(buf->ct);
}
if (dostroke && cbp->phantom_line) {
ink_cairo_set_source_rgba32(buf->ct, 0xffffff4d);
cairo_set_line_width(buf->ct, 2);
if (cbp->dashes[0] != 0 && cbp->dashes[1] != 0) {
cairo_set_dash (buf->ct, cbp->dashes, 2, 0);
}
cairo_stroke(buf->ct);
cairo_set_tolerance(buf->ct, 0.5);
cairo_new_path(buf->ct);
feed_pathvector_to_cairo (buf->ct, cbp->curve->get_pathvector(), cbp->affine, area,
/* optimized_stroke = */ !dofill, 1);
ink_cairo_set_source_rgba32(buf->ct, cbp->stroke_rgba);
cairo_set_line_width(buf->ct, 1);
cairo_stroke(buf->ct);
} else if (dostroke) {
ink_cairo_set_source_rgba32(buf->ct, cbp->stroke_rgba);
cairo_set_line_width(buf->ct, 1);
if (cbp->dashes[0] != 0 && cbp->dashes[1] != 0) {
cairo_set_dash (buf->ct, cbp->dashes, 2, 0);
}
cairo_stroke(buf->ct);
} else {
cairo_new_path(buf->ct);
}
}
static double
sp_canvas_bpath_point (SPCanvasItem *item, Geom::Point p, SPCanvasItem **actual_item)
{
SPCanvasBPath *cbp = SP_CANVAS_BPATH (item);
if ( !cbp->curve ||
((cbp->stroke_rgba & 0xff) == 0 && (cbp->fill_rgba & 0xff) == 0 ) ||
cbp->curve->get_segment_count() < 1)
return Geom::infinity();
double width = 0.5;
Geom::Rect viewbox = item->canvas->getViewbox();
viewbox.expandBy (width);
double dist = Geom::infinity();
pathv_matrix_point_bbox_wind_distance(cbp->curve->get_pathvector(), cbp->affine, p, nullptr, nullptr, &dist, 0.5, &viewbox);
if (dist <= 1.0) {
*actual_item = item;
}
return dist;
}
SPCanvasItem *
sp_canvas_bpath_new (SPCanvasGroup *parent, SPCurve *curve, bool phantom_line)
{
g_return_val_if_fail (parent != nullptr, NULL);
g_return_val_if_fail (SP_IS_CANVAS_GROUP (parent), NULL);
SPCanvasItem *item = sp_canvas_item_new (parent, SP_TYPE_CANVAS_BPATH, nullptr);
sp_canvas_bpath_set_bpath (SP_CANVAS_BPATH (item), curve, phantom_line);
return item;
}
void
sp_canvas_bpath_set_bpath (SPCanvasBPath *cbp, SPCurve *curve, bool phantom_line)
{
g_return_if_fail (cbp != nullptr);
g_return_if_fail (SP_IS_CANVAS_BPATH (cbp));
cbp->phantom_line = phantom_line;
if (cbp->curve) {
cbp->curve = cbp->curve->unref();
}
if (curve) {
cbp->curve = curve->ref();
}
sp_canvas_item_request_update (SP_CANVAS_ITEM (cbp));
}
void
sp_canvas_bpath_set_fill (SPCanvasBPath *cbp, guint32 rgba, SPWindRule rule)
{
g_return_if_fail (cbp != nullptr);
g_return_if_fail (SP_IS_CANVAS_BPATH (cbp));
cbp->fill_rgba = rgba;
cbp->fill_rule = rule;
sp_canvas_item_request_update (SP_CANVAS_ITEM (cbp));
}
void
sp_canvas_bpath_set_stroke (SPCanvasBPath *cbp, guint32 rgba, gdouble width, SPStrokeJoinType join, SPStrokeCapType cap, double dash, double gap)
{
g_return_if_fail (cbp != nullptr);
g_return_if_fail (SP_IS_CANVAS_BPATH (cbp));
cbp->stroke_rgba = rgba;
cbp->stroke_width = MAX (width, 0.1);
cbp->stroke_linejoin = join;
cbp->stroke_linecap = cap;
cbp->dashes[0] = dash;
cbp->dashes[1] = gap;
sp_canvas_item_request_update (SP_CANVAS_ITEM (cbp));
}
/*
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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