1 /*
2 * Simple bezier bpath CanvasItem for inkscape
3 *
4 * Authors:
5 * Lauris Kaplinski <lauris@ximian.com>
6 *
7 * Copyright (C) 2001 Lauris Kaplinski and Ximian, Inc.
8 *
9 * Released under GNU GPL
10 *
11 */
13 #ifdef HAVE_CONFIG_H
14 # include "config.h"
15 #endif
16 #include <sstream>
17 #include <string.h>
18 #include <desktop.h>
20 #include "color.h"
21 #include "sp-canvas-util.h"
22 #include "inkscape-cairo.h"
23 #include "canvas-bpath.h"
24 #include "display/sp-canvas-group.h"
25 #include "display/curve.h"
26 #include "display/inkscape-cairo.h"
27 #include "libnr/nr-pixops.h"
28 #include "helper/geom.h"
31 void nr_pixblock_render_bpath_rgba (Shape* theS,uint32_t color,NRRectL &area,char* destBuf,int stride);
33 static void sp_canvas_bpath_class_init (SPCanvasBPathClass *klass);
34 static void sp_canvas_bpath_init (SPCanvasBPath *path);
35 static void sp_canvas_bpath_destroy (GtkObject *object);
37 static void sp_canvas_bpath_update (SPCanvasItem *item, Geom::Matrix const &affine, unsigned int flags);
38 static void sp_canvas_bpath_render (SPCanvasItem *item, SPCanvasBuf *buf);
39 static double sp_canvas_bpath_point (SPCanvasItem *item, Geom::Point p, SPCanvasItem **actual_item);
41 static SPCanvasItemClass *parent_class;
43 GtkType
44 sp_canvas_bpath_get_type (void)
45 {
46 static GtkType type = 0;
47 if (!type) {
48 GtkTypeInfo info = {
49 (gchar *)"SPCanvasBPath",
50 sizeof (SPCanvasBPath),
51 sizeof (SPCanvasBPathClass),
52 (GtkClassInitFunc) sp_canvas_bpath_class_init,
53 (GtkObjectInitFunc) sp_canvas_bpath_init,
54 NULL, NULL, NULL
55 };
56 type = gtk_type_unique (SP_TYPE_CANVAS_ITEM, &info);
57 }
58 return type;
59 }
61 static void
62 sp_canvas_bpath_class_init (SPCanvasBPathClass *klass)
63 {
64 GtkObjectClass *object_class;
65 SPCanvasItemClass *item_class;
67 object_class = GTK_OBJECT_CLASS (klass);
68 item_class = (SPCanvasItemClass *) klass;
70 parent_class = (SPCanvasItemClass*)gtk_type_class (SP_TYPE_CANVAS_ITEM);
72 object_class->destroy = sp_canvas_bpath_destroy;
74 item_class->update = sp_canvas_bpath_update;
75 item_class->render = sp_canvas_bpath_render;
76 item_class->point = sp_canvas_bpath_point;
77 }
79 static void
80 sp_canvas_bpath_init (SPCanvasBPath * bpath)
81 {
82 bpath->fill_rgba = 0x00000000;
83 bpath->fill_rule = SP_WIND_RULE_EVENODD;
85 bpath->stroke_rgba = 0x00000000;
86 bpath->stroke_width = 1.0;
87 bpath->stroke_linejoin = SP_STROKE_LINEJOIN_MITER;
88 bpath->stroke_linecap = SP_STROKE_LINECAP_BUTT;
89 bpath->stroke_miterlimit = 11.0;
90 }
92 static void
93 sp_canvas_bpath_destroy (GtkObject *object)
94 {
95 SPCanvasBPath *cbp = SP_CANVAS_BPATH (object);
97 if (cbp->curve) {
98 cbp->curve = cbp->curve->unref();
99 }
101 if (GTK_OBJECT_CLASS (parent_class)->destroy)
102 (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
103 }
105 static void
106 sp_canvas_bpath_update (SPCanvasItem *item, Geom::Matrix const &affine, unsigned int flags)
107 {
108 SPCanvasBPath *cbp = SP_CANVAS_BPATH (item);
110 sp_canvas_request_redraw (item->canvas, (int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
112 if (((SPCanvasItemClass *) parent_class)->update)
113 ((SPCanvasItemClass *) parent_class)->update (item, affine, flags);
115 sp_canvas_item_reset_bounds (item);
117 if (!cbp->curve) return;
119 cbp->affine = affine;
121 Geom::OptRect bbox = bounds_exact_transformed(cbp->curve->get_pathvector(), affine);
123 if (bbox) {
124 item->x1 = (int)bbox->min()[Geom::X] - 1;
125 item->y1 = (int)bbox->min()[Geom::Y] - 1;
126 item->x2 = (int)bbox->max()[Geom::X] + 1;
127 item->y2 = (int)bbox->max()[Geom::Y] + 1;
128 } else {
129 item->x1 = 0;
130 item->y1 = 0;
131 item->x2 = 0;
132 item->y2 = 0;
133 }
134 sp_canvas_request_redraw (item->canvas, (int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
135 }
137 static void
138 sp_canvas_bpath_render (SPCanvasItem *item, SPCanvasBuf *buf)
139 {
140 SPCanvasBPath *cbp = SP_CANVAS_BPATH (item);
142 sp_canvas_prepare_buffer(buf);
144 Geom::Rect area (Geom::Point(buf->rect.x0, buf->rect.y0), Geom::Point(buf->rect.x1, buf->rect.y1));
146 if ( !cbp->curve ||
147 ((cbp->stroke_rgba & 0xff) == 0 && (cbp->fill_rgba & 0xff) == 0 ) ||
148 cbp->curve->get_segment_count() < 1)
149 return;
151 if (!buf->ct)
152 return;
154 bool dofill = ((cbp->fill_rgba & 0xff) != 0);
155 bool dostroke = ((cbp->stroke_rgba & 0xff) != 0);
157 cairo_set_tolerance(buf->ct, 1.25); // low quality, but good enough for canvas items
158 cairo_new_path(buf->ct);
160 if (!dofill)
161 feed_pathvector_to_cairo (buf->ct, cbp->curve->get_pathvector(), cbp->affine, area, true, 1);
162 else
163 feed_pathvector_to_cairo (buf->ct, cbp->curve->get_pathvector(), cbp->affine, area, false, 1);
165 if (dofill) {
166 // RGB / BGR
167 cairo_set_source_rgba(buf->ct, SP_RGBA32_B_F(cbp->fill_rgba), SP_RGBA32_G_F(cbp->fill_rgba), SP_RGBA32_R_F(cbp->fill_rgba), SP_RGBA32_A_F(cbp->fill_rgba));
168 cairo_set_fill_rule(buf->ct, cbp->fill_rule == SP_WIND_RULE_EVENODD? CAIRO_FILL_RULE_EVEN_ODD
169 : CAIRO_FILL_RULE_WINDING);
170 if (dostroke)
171 cairo_fill_preserve(buf->ct);
172 else
173 cairo_fill(buf->ct);
174 }
176 if (dostroke) {
177 // RGB / BGR
178 cairo_set_source_rgba(buf->ct, SP_RGBA32_B_F(cbp->stroke_rgba), SP_RGBA32_G_F(cbp->stroke_rgba), SP_RGBA32_R_F(cbp->stroke_rgba), SP_RGBA32_A_F(cbp->stroke_rgba));
179 cairo_set_line_width(buf->ct, 1);
180 if (cbp->dashes[0] != 0 && cbp->dashes[1] != 0) {
181 cairo_set_dash (buf->ct, cbp->dashes, 2, 0);
182 }
183 cairo_stroke(buf->ct);
184 }
185 }
187 static double
188 sp_canvas_bpath_point (SPCanvasItem *item, Geom::Point p, SPCanvasItem **actual_item)
189 {
190 SPCanvasBPath *cbp = SP_CANVAS_BPATH (item);
192 if ( !cbp->curve ||
193 ((cbp->stroke_rgba & 0xff) == 0 && (cbp->fill_rgba & 0xff) == 0 ) ||
194 cbp->curve->get_segment_count() < 1)
195 return NR_HUGE;
197 double width = 0.5;
198 Geom::Rect viewbox = item->canvas->getViewbox();
199 viewbox.expandBy (width);
200 double dist = NR_HUGE;
201 pathv_matrix_point_bbox_wind_distance(cbp->curve->get_pathvector(), cbp->affine, p, NULL, NULL, &dist, 0.5, &viewbox);
203 if (dist <= 1.0) {
204 *actual_item = item;
205 }
207 return dist;
208 }
210 SPCanvasItem *
211 sp_canvas_bpath_new (SPCanvasGroup *parent, SPCurve *curve)
212 {
213 g_return_val_if_fail (parent != NULL, NULL);
214 g_return_val_if_fail (SP_IS_CANVAS_GROUP (parent), NULL);
216 SPCanvasItem *item = sp_canvas_item_new (parent, SP_TYPE_CANVAS_BPATH, NULL);
218 sp_canvas_bpath_set_bpath (SP_CANVAS_BPATH (item), curve);
220 return item;
221 }
223 void
224 sp_canvas_bpath_set_bpath (SPCanvasBPath *cbp, SPCurve *curve)
225 {
226 g_return_if_fail (cbp != NULL);
227 g_return_if_fail (SP_IS_CANVAS_BPATH (cbp));
229 if (cbp->curve) {
230 cbp->curve = cbp->curve->unref();
231 }
233 if (curve) {
234 cbp->curve = curve->ref();
235 }
237 sp_canvas_item_request_update (SP_CANVAS_ITEM (cbp));
238 }
240 void
241 sp_canvas_bpath_set_fill (SPCanvasBPath *cbp, guint32 rgba, SPWindRule rule)
242 {
243 g_return_if_fail (cbp != NULL);
244 g_return_if_fail (SP_IS_CANVAS_BPATH (cbp));
246 cbp->fill_rgba = rgba;
247 cbp->fill_rule = rule;
249 sp_canvas_item_request_update (SP_CANVAS_ITEM (cbp));
250 }
252 void
253 sp_canvas_bpath_set_stroke (SPCanvasBPath *cbp, guint32 rgba, gdouble width, SPStrokeJoinType join, SPStrokeCapType cap, double dash, double gap)
254 {
255 g_return_if_fail (cbp != NULL);
256 g_return_if_fail (SP_IS_CANVAS_BPATH (cbp));
258 cbp->stroke_rgba = rgba;
259 cbp->stroke_width = MAX (width, 0.1);
260 cbp->stroke_linejoin = join;
261 cbp->stroke_linecap = cap;
262 cbp->dashes[0] = dash;
263 cbp->dashes[1] = gap;
265 sp_canvas_item_request_update (SP_CANVAS_ITEM (cbp));
266 }
268 /*
269 Local Variables:
270 mode:c++
271 c-file-style:"stroustrup"
272 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
273 indent-tabs-mode:nil
274 fill-column:99
275 End:
276 */
277 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :