1 #define __SP_CANVAS_BPATH_C__
3 /*
4 * Simple bezier bpath CanvasItem for inkscape
5 *
6 * Authors:
7 * Lauris Kaplinski <lauris@ximian.com>
8 *
9 * Copyright (C) 2001 Lauris Kaplinski and Ximian, Inc.
10 *
11 * Released under GNU GPL
12 *
13 */
15 #ifdef HAVE_CONFIG_H
16 # include "config.h"
17 #endif
18 #include "color.h"
19 #include "sp-canvas-util.h"
20 #include "inkscape-cairo.h"
21 #include "canvas-bpath.h"
22 #include "display/display-forward.h"
23 #include "display/curve.h"
24 #include "display/inkscape-cairo.h"
25 #include "libnr/nr-matrix-fns.h"
26 #include <libnr/nr-pixops.h>
27 #include <libnr/nr-convert2geom.h>
28 #include <libnr/nr-path.h>
30 void nr_pixblock_render_bpath_rgba (Shape* theS,uint32_t color,NRRectL &area,char* destBuf,int stride);
32 static void sp_canvas_bpath_class_init (SPCanvasBPathClass *klass);
33 static void sp_canvas_bpath_init (SPCanvasBPath *path);
34 static void sp_canvas_bpath_destroy (GtkObject *object);
36 static void sp_canvas_bpath_update (SPCanvasItem *item, NR::Matrix const &affine, unsigned int flags);
37 static void sp_canvas_bpath_render (SPCanvasItem *item, SPCanvasBuf *buf);
38 static double sp_canvas_bpath_point (SPCanvasItem *item, NR::Point p, SPCanvasItem **actual_item);
40 static SPCanvasItemClass *parent_class;
42 GtkType
43 sp_canvas_bpath_get_type (void)
44 {
45 static GtkType type = 0;
46 if (!type) {
47 GtkTypeInfo info = {
48 (gchar *)"SPCanvasBPath",
49 sizeof (SPCanvasBPath),
50 sizeof (SPCanvasBPathClass),
51 (GtkClassInitFunc) sp_canvas_bpath_class_init,
52 (GtkObjectInitFunc) sp_canvas_bpath_init,
53 NULL, NULL, NULL
54 };
55 type = gtk_type_unique (SP_TYPE_CANVAS_ITEM, &info);
56 }
57 return type;
58 }
60 static void
61 sp_canvas_bpath_class_init (SPCanvasBPathClass *klass)
62 {
63 GtkObjectClass *object_class;
64 SPCanvasItemClass *item_class;
66 object_class = GTK_OBJECT_CLASS (klass);
67 item_class = (SPCanvasItemClass *) klass;
69 parent_class = (SPCanvasItemClass*)gtk_type_class (SP_TYPE_CANVAS_ITEM);
71 object_class->destroy = sp_canvas_bpath_destroy;
73 item_class->update = sp_canvas_bpath_update;
74 item_class->render = sp_canvas_bpath_render;
75 item_class->point = sp_canvas_bpath_point;
76 }
78 static void
79 sp_canvas_bpath_init (SPCanvasBPath * bpath)
80 {
81 bpath->fill_rgba = 0x00000000;
82 bpath->fill_rule = SP_WIND_RULE_EVENODD;
84 bpath->stroke_rgba = 0x00000000;
85 bpath->stroke_width = 1.0;
86 bpath->stroke_linejoin = SP_STROKE_LINEJOIN_MITER;
87 bpath->stroke_linecap = SP_STROKE_LINECAP_BUTT;
88 bpath->stroke_miterlimit = 11.0;
89 }
91 static void
92 sp_canvas_bpath_destroy (GtkObject *object)
93 {
94 SPCanvasBPath *cbp = SP_CANVAS_BPATH (object);
96 if (cbp->curve) {
97 cbp->curve = cbp->curve->unref();
98 }
100 if (GTK_OBJECT_CLASS (parent_class)->destroy)
101 (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
102 }
104 static void
105 sp_canvas_bpath_update (SPCanvasItem *item, NR::Matrix const &affine, unsigned int flags)
106 {
107 SPCanvasBPath *cbp = SP_CANVAS_BPATH (item);
109 sp_canvas_request_redraw (item->canvas, (int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
111 if (((SPCanvasItemClass *) parent_class)->update)
112 ((SPCanvasItemClass *) parent_class)->update (item, affine, flags);
114 sp_canvas_item_reset_bounds (item);
116 if (!cbp->curve) return;
118 cbp->affine = affine;
120 const_NRBPath bp;
121 bp.path = cbp->curve->get_bpath();
122 NRRect bbox;
123 nr_path_matrix_bbox_union(&bp, affine, &bbox);
125 item->x1 = (int)bbox.x0 - 1;
126 item->y1 = (int)bbox.y0 - 1;
127 item->x2 = (int)bbox.x1 + 1;
128 item->y2 = (int)bbox.y1 + 1;
130 sp_canvas_request_redraw (item->canvas, (int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
131 }
133 static void
134 sp_canvas_bpath_render (SPCanvasItem *item, SPCanvasBuf *buf)
135 {
136 SPCanvasBPath *cbp = SP_CANVAS_BPATH (item);
138 sp_canvas_prepare_buffer(buf);
140 NR::Rect area (NR::Point(buf->rect.x0, buf->rect.y0), NR::Point(buf->rect.x1, buf->rect.y1));
142 if ( !cbp->curve ||
143 ((cbp->stroke_rgba & 0xff) == 0 && (cbp->fill_rgba & 0xff) == 0 ) ||
144 cbp->curve->get_length() <= 1)
145 return;
147 if (!buf->ct)
148 return;
150 bool dofill = ((cbp->fill_rgba & 0xff) != 0);
151 bool dostroke = ((cbp->stroke_rgba & 0xff) != 0);
153 cairo_set_tolerance(buf->ct, 1.25); // low quality, but good enough for canvas items
154 cairo_new_path(buf->ct);
156 if (!dofill)
157 feed_pathvector_to_cairo (buf->ct, cbp->curve->get_pathvector(), to_2geom(cbp->affine), area, true, 1);
158 else
159 feed_pathvector_to_cairo (buf->ct, cbp->curve->get_pathvector(), to_2geom(cbp->affine), area, false, 1);
161 if (dofill) {
162 // RGB / BGR
163 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));
164 cairo_set_fill_rule(buf->ct, cbp->fill_rule == SP_WIND_RULE_EVENODD? CAIRO_FILL_RULE_EVEN_ODD
165 : CAIRO_FILL_RULE_WINDING);
166 if (dostroke)
167 cairo_fill_preserve(buf->ct);
168 else
169 cairo_fill(buf->ct);
170 }
172 if (dostroke) {
173 // RGB / BGR
174 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));
175 cairo_set_line_width(buf->ct, 1);
176 cairo_stroke(buf->ct);
177 }
178 }
180 static double
181 sp_canvas_bpath_point (SPCanvasItem *item, NR::Point p, SPCanvasItem **actual_item)
182 {
183 SPCanvasBPath *cbp = SP_CANVAS_BPATH (item);
185 const_NRBPath bp;
186 if ( !cbp->curve ||
187 ((cbp->stroke_rgba & 0xff) == 0 && (cbp->fill_rgba & 0xff) == 0 ) ||
188 cbp->curve->get_length() <= 1)
189 return NR_HUGE;
191 bp.path = cbp->curve->get_bpath();
193 double width = 0.5;
194 NR::Rect viewbox = item->canvas->getViewbox();
195 viewbox.growBy (width);
196 double dist = NR_HUGE;
197 nr_path_matrix_point_bbox_wind_distance(&bp, cbp->affine, p, NULL, NULL, &dist, 0.5, &viewbox);
199 if (dist <= 1.0) {
200 *actual_item = item;
201 }
203 return dist;
204 }
206 SPCanvasItem *
207 sp_canvas_bpath_new (SPCanvasGroup *parent, SPCurve *curve)
208 {
209 g_return_val_if_fail (parent != NULL, NULL);
210 g_return_val_if_fail (SP_IS_CANVAS_GROUP (parent), NULL);
212 SPCanvasItem *item = sp_canvas_item_new (parent, SP_TYPE_CANVAS_BPATH, NULL);
214 sp_canvas_bpath_set_bpath (SP_CANVAS_BPATH (item), curve);
216 return item;
217 }
219 void
220 sp_canvas_bpath_set_bpath (SPCanvasBPath *cbp, SPCurve *curve)
221 {
222 g_return_if_fail (cbp != NULL);
223 g_return_if_fail (SP_IS_CANVAS_BPATH (cbp));
225 if (cbp->curve) {
226 cbp->curve = cbp->curve->unref();
227 }
229 if (curve) {
230 cbp->curve = curve->ref();
231 }
233 sp_canvas_item_request_update (SP_CANVAS_ITEM (cbp));
234 }
236 void
237 sp_canvas_bpath_set_fill (SPCanvasBPath *cbp, guint32 rgba, SPWindRule rule)
238 {
239 g_return_if_fail (cbp != NULL);
240 g_return_if_fail (SP_IS_CANVAS_BPATH (cbp));
242 cbp->fill_rgba = rgba;
243 cbp->fill_rule = rule;
245 sp_canvas_item_request_update (SP_CANVAS_ITEM (cbp));
246 }
248 void
249 sp_canvas_bpath_set_stroke (SPCanvasBPath *cbp, guint32 rgba, gdouble width, SPStrokeJoinType join, SPStrokeCapType cap)
250 {
251 g_return_if_fail (cbp != NULL);
252 g_return_if_fail (SP_IS_CANVAS_BPATH (cbp));
254 cbp->stroke_rgba = rgba;
255 cbp->stroke_width = MAX (width, 0.1);
256 cbp->stroke_linejoin = join;
257 cbp->stroke_linecap = cap;
259 sp_canvas_item_request_update (SP_CANVAS_ITEM (cbp));
260 }
265 /*
266 Local Variables:
267 mode:c++
268 c-file-style:"stroustrup"
269 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
270 indent-tabs-mode:nil
271 fill-column:99
272 End:
273 */
274 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :