Adding upstream version 1.0.2.upstream/1.0.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 253 insertions, 0 deletions

diff --git a/src/display/canvas-bpath.cpp b/src/display/canvas-bpath.cpp
new file mode 100644
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 :