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-rw-r--r--src/display/canvas-bpath.cpp253
1 files changed, 253 insertions, 0 deletions
diff --git a/src/display/canvas-bpath.cpp b/src/display/canvas-bpath.cpp
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index 0000000..327bb1c
--- /dev/null
+++ b/src/display/canvas-bpath.cpp
@@ -0,0 +1,253 @@
+// 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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