1 /* ADG - Automatic Drawing Generation
2 * Copyright (C) 2007,2008,2009,2010,2011,2012,2013 Nicola Fontana <ntd at entidi.it>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
26 static void parse_args (gint
*p_argc
,
29 duplicate_and_stroke (cairo_t
*cr
);
30 static void stroke_and_destroy (cairo_t
*cr
,
33 static void browsing (GtkWidget
*widget
,
36 static void browsing_segment (GtkToggleButton
*togglebutton
,
38 static void browsing_primitive (GtkToggleButton
*togglebutton
,
40 static void browsing_reset (GtkButton
*button
,
42 static void browsing_next (GtkButton
*button
,
45 static gboolean
arcs (GtkWidget
*widget
,
48 static void arc3p (cairo_t
*cr
,
56 static gboolean
intersections (GtkWidget
*widget
,
59 static void algorithm_changed (GtkRadioButton
*button
,
61 static gboolean
offset_curves (GtkWidget
*widget
,
64 static gboolean
offset_segments (GtkWidget
*widget
,
70 browsing_gtk2(GtkWidget
*widget
, GdkEventExpose
*event
, gpointer user_data
)
72 cairo_t
*cr
= gdk_cairo_create(widget
->window
);
78 arcs_gtk2(GtkWidget
*widget
, GdkEventExpose
*event
, gpointer user_data
)
80 cairo_t
*cr
= gdk_cairo_create(widget
->window
);
86 intersections_gtk2(GtkWidget
*widget
)
88 cairo_t
*cr
= gdk_cairo_create(widget
->window
);
89 intersections(widget
, cr
);
94 offset_curves_gtk2(GtkWidget
*widget
)
96 cairo_t
*cr
= gdk_cairo_create(widget
->window
);
97 offset_curves(widget
, cr
);
102 offset_segments_gtk2(GtkWidget
*widget
)
104 cairo_t
*cr
= gdk_cairo_create(widget
->window
);
105 offset_segments(widget
, cr
);
111 static void circle_callback (cairo_t
*cr
);
112 static void piston_callback (cairo_t
*cr
);
113 static void curve1_callback (cairo_t
*cr
);
114 static void line1_callback (cairo_t
*cr
);
118 cairo_path_t
*cairo_path
;
119 gboolean use_segment
;
121 CpmlPrimitive primitive
;
126 static CpmlPair bezier_samples
[][4] = {
127 { { 0, 0 }, { 0, 40 }, { 120, 40 }, { 120, 0 } }, /* Simmetric low */
128 { { 40, 0 }, { 40, 160 }, { 80, 160 }, { 80, 0 } }, /* Simmetric high */
129 { { 0, 0 }, { 33.1371, 33.1371 }, { 86.8629, 33.1371 }, { 120, 0 } },
130 /* Arc approximation */
131 { { 0, 0 }, { 70, 120 }, { 50, 120 }, { 120, 0 } }, /* Twisted controls */
133 { { 0, 0 }, { 0, 120 }, { 60, 120 }, { 120, 0 } }, /* Vertical p1-p2 */
134 { { 0, 0 }, { 60, 120 }, { 120, 120 }, { 120, 0 } },/* Vertical p3-p4 */
135 { { 0, 120 }, { 120, 120 }, { 120, 60 }, { 0, 0 } },/* Horizontal p1-p2 */
136 { { 0, 120 }, { 120, 60 }, { 120, 0 }, { 0, 0 } }, /* Horizontal p3-p4 */
138 { { 0, 0 }, { 0, 120 }, { 120, 120 }, { 120, 0 } }, /* Down */
139 { { 0, 120 }, { 120, 120 }, { 120, 0 }, { 0, 0 } }, /* Right */
140 { { 0, 120 }, { 0, 0 }, { 120, 0 }, { 120, 120 } }, /* Up */
141 { { 120, 120 }, { 0, 120 }, { 0, 0 }, { 120, 0 } }, /* Left */
143 { { 0, 60 }, { 60, 120 }, { 120, 60 }, { 60, 0 } }, /* Down-right */
144 { { 60, 120 }, { 120, 60 }, { 60, 0 }, { 0, 60 } }, /* Up-right */
145 { { 120, 60 }, { 60, 0 }, { 0, 60 }, { 60, 120 } }, /* Up-left */
146 { { 60, 0 }, { 0, 60 }, { 60, 120 }, { 120, 60 } }, /* Down-left*/
148 { { 0, 0 }, { 60, 0 }, { 60, 120 }, { 120, 120 } }, /* Step left */
149 { { 120, 0 }, { 60, 0 }, { 60, 120 }, { 0, 120 } }, /* Step right */
150 { { 0, 0 }, { 60, 90 }, { 90, 120 }, { 120, 90 } }, /* Unbalanced opened */
151 { { 0, 0 }, { 40, 120 }, { 120, 120 }, { 60, 80 } } /* Unbalanced closed */
154 static void (*path_samples
[]) (cairo_t
*cr
) = {
162 switch_page(GtkTreeSelection
*selection
, GtkNotebook
*notebook
)
164 GList
*list
= gtk_tree_selection_get_selected_rows(selection
, NULL
);
166 GtkTreePath
*path
= g_list_first(list
)->data
;
167 gint page
= path
!= NULL
? *gtk_tree_path_get_indices(path
) : -1;
168 g_list_free_full(list
, (GDestroyNotify
) gtk_tree_path_free
);
170 gtk_notebook_set_current_page(notebook
, page
);
175 main(gint argc
, gchar
**argv
)
183 _demo_init(argc
, argv
);
184 parse_args(&argc
, &argv
);
186 /* Prepend the package icons path */
189 icons_dir
= g_build_filename(basedir
, PKGDATADIR
, "icons", NULL
);
191 icons_dir
= g_strdup(PKGDATADIR
"/icons");
194 icons_dir
= g_strdup(SRCDIR
"/icons");
197 gtk_icon_theme_append_search_path(gtk_icon_theme_get_default(), icons_dir
);
200 path
= _demo_file("cpml-demo.ui");
202 g_printerr(_("cpml-demo.ui not found!\n"));
206 builder
= gtk_builder_new();
209 gtk_builder_set_translation_domain(builder
, GETTEXT_PACKAGE
);
210 gtk_builder_add_from_file(builder
, path
, &error
);
214 g_print("%s\n", error
->message
);
218 window
= (GtkWidget
*) gtk_builder_get_object(builder
, "wndMain");
220 /* Connect signals */
221 g_signal_connect(window
, "delete-event", G_CALLBACK(gtk_main_quit
), NULL
);
222 g_signal_connect(gtk_tree_view_get_selection(GTK_TREE_VIEW(gtk_builder_get_object(builder
, "tvPages"))),
223 "changed", G_CALLBACK(switch_page
),
224 gtk_builder_get_object(builder
, "nbPages"));
225 g_signal_connect(gtk_builder_get_object(builder
, "optBrowsingSegment"),
226 "toggled", G_CALLBACK(browsing_segment
), NULL
);
227 g_signal_connect(gtk_builder_get_object(builder
, "optBrowsingPrimitive"),
228 "toggled", G_CALLBACK(browsing_primitive
), NULL
);
229 g_signal_connect(gtk_builder_get_object(builder
, "btnBrowsingReset"),
230 "clicked", G_CALLBACK(browsing_reset
), NULL
);
231 g_signal_connect(gtk_builder_get_object(builder
, "btnBrowsingNext"),
232 "clicked", G_CALLBACK(browsing_next
), NULL
);
233 g_signal_connect(gtk_builder_get_object(builder
, "optAlgorithmDefault"),
234 "toggled", G_CALLBACK(algorithm_changed
),
235 gtk_builder_get_object(builder
, "areaOffsetCurves"));
236 g_signal_connect(gtk_builder_get_object(builder
, "optAlgorithmBaioca"),
237 "toggled", G_CALLBACK(algorithm_changed
),
238 gtk_builder_get_object(builder
, "areaOffsetCurves"));
239 g_signal_connect(gtk_builder_get_object(builder
, "optAlgorithmHandcraft"),
240 "toggled", G_CALLBACK(algorithm_changed
),
241 gtk_builder_get_object(builder
, "areaOffsetCurves"));
243 g_signal_connect(gtk_builder_get_object(builder
, "areaBrowsing"),
244 "expose-event", G_CALLBACK(browsing_gtk2
), NULL
);
245 g_signal_connect(gtk_builder_get_object(builder
, "areaArcs"),
246 "expose-event", G_CALLBACK(arcs_gtk2
), NULL
);
247 g_signal_connect(gtk_builder_get_object(builder
, "areaIntersections"),
248 "expose-event", G_CALLBACK(intersections_gtk2
), NULL
);
249 g_signal_connect(gtk_builder_get_object(builder
, "areaOffsetCurves"),
250 "expose-event", G_CALLBACK(offset_curves_gtk2
), NULL
);
251 g_signal_connect(gtk_builder_get_object(builder
, "areaOffsetSegments"),
252 "expose-event", G_CALLBACK(offset_segments_gtk2
), NULL
);
253 g_signal_connect(gtk_builder_get_object(builder
, "btnQuit"),
254 "clicked", G_CALLBACK(gtk_main_quit
), NULL
);
256 g_signal_connect(gtk_builder_get_object(builder
, "areaBrowsing"),
257 "draw", G_CALLBACK(browsing
), NULL
);
258 g_signal_connect(gtk_builder_get_object(builder
, "areaArcs"),
259 "draw", G_CALLBACK(arcs
), NULL
);
260 g_signal_connect(gtk_builder_get_object(builder
, "areaIntersections"),
261 "draw", G_CALLBACK(intersections
), NULL
);
262 g_signal_connect(gtk_builder_get_object(builder
, "areaOffsetCurves"),
263 "draw", G_CALLBACK(offset_curves
), NULL
);
264 g_signal_connect(gtk_builder_get_object(builder
, "areaOffsetSegments"),
265 "draw", G_CALLBACK(offset_segments
), NULL
);
266 g_signal_connect(gtk_builder_get_object(builder
, "btnQuit"),
267 "clicked", G_CALLBACK(gtk_main_quit
), NULL
);
270 g_object_unref(builder
);
272 gtk_widget_show_all(window
);
279 /**********************************************
280 * Command line options parser
281 **********************************************/
286 g_print("cpml-demo " PACKAGE_VERSION
"\n");
291 parse_args(gint
*p_argc
, gchar
**p_argv
[])
293 GError
*error
= NULL
;
294 GOptionEntry entries
[] = {
295 {"version", 'V', G_OPTION_FLAG_NO_ARG
, G_OPTION_ARG_CALLBACK
,
296 (gpointer
) version
, _("Display version information"), NULL
},
300 gtk_init_with_args(p_argc
, p_argv
, _("- CPML demonstration program"),
301 entries
, GETTEXT_PACKAGE
, &error
);
304 gint error_code
= error
->code
;
306 g_printerr("%s\n", error
->message
);
314 static cairo_path_t
*
315 duplicate_and_stroke(cairo_t
*cr
)
317 cairo_path_t
*path
= cairo_copy_path(cr
);
319 cairo_set_line_width(cr
, 2.);
326 stroke_and_destroy(cairo_t
*cr
, cairo_path_t
*path
)
328 cairo_append_path(cr
, path
);
329 cairo_path_destroy(path
);
331 cairo_set_line_width(cr
, 1.);
337 browsing(GtkWidget
*widget
, cairo_t
*cr
)
339 if (browsing_data
.area
== NULL
) {
342 /* Initialize browsing_data */
343 browsing_data
.area
= widget
;
344 browsing_data
.use_segment
= TRUE
;
346 /* Append all the path samples to the cairo context */
348 cairo_translate(cr
, 270.5, -120.5);
349 for (n
= 0; n
< G_N_ELEMENTS(path_samples
); ++n
) {
351 cairo_translate(cr
, -270., 240.);
353 cairo_translate(cr
, 270., 0.);
356 (path_samples
[n
]) (cr
);
360 browsing_data
.cairo_path
= cairo_copy_path(cr
);
361 cpml_segment_from_cairo(&browsing_data
.segment
,
362 browsing_data
.cairo_path
);
363 cpml_primitive_from_segment(&browsing_data
.primitive
,
364 &browsing_data
.segment
);
366 cairo_append_path(cr
, browsing_data
.cairo_path
);
369 cairo_set_line_width(cr
, 2.);
372 cairo_set_source_rgb(cr
, 1., 0.4, 0.);
373 cairo_set_line_width(cr
, 5.);
375 if (browsing_data
.use_segment
)
376 cpml_segment_to_cairo(&browsing_data
.segment
, cr
);
378 cpml_primitive_to_cairo(&browsing_data
.primitive
, cr
);
384 browsing_segment(GtkToggleButton
*togglebutton
, gpointer user_data
)
386 if (!gtk_toggle_button_get_active(togglebutton
))
389 browsing_data
.use_segment
= TRUE
;
390 gtk_widget_queue_draw(browsing_data
.area
);
394 browsing_primitive(GtkToggleButton
*togglebutton
, gpointer user_data
)
396 if (!gtk_toggle_button_get_active(togglebutton
))
399 browsing_data
.use_segment
= FALSE
;
400 gtk_widget_queue_draw(browsing_data
.area
);
404 browsing_reset(GtkButton
*button
, gpointer user_data
)
406 if (browsing_data
.use_segment
) {
407 cpml_segment_reset(&browsing_data
.segment
);
408 cpml_primitive_from_segment(&browsing_data
.primitive
,
409 &browsing_data
.segment
);
411 cpml_primitive_reset(&browsing_data
.primitive
);
414 gtk_widget_queue_draw(browsing_data
.area
);
418 browsing_next(GtkButton
*button
, gpointer user_data
)
420 if (browsing_data
.use_segment
) {
421 cpml_segment_next(&browsing_data
.segment
);
422 cpml_primitive_from_segment(&browsing_data
.primitive
,
423 &browsing_data
.segment
);
425 cpml_primitive_next(&browsing_data
.primitive
);
428 gtk_widget_queue_draw(browsing_data
.area
);
433 arcs(GtkWidget
*widget
, cairo_t
*cr
)
435 cairo_translate(cr
, 100.5, 100.5);
436 arc3p(cr
, 0, 0, 0, 120, 120, 120);
438 cairo_translate(cr
, 200, 0.);
439 arc3p(cr
, 0, 0, 120, 0, 120, 120);
441 cairo_translate(cr
, 200, 0.);
442 arc3p(cr
, 60, 0, 0, 120, 120, 120);
444 cairo_translate(cr
, -400, 200);
445 arc3p(cr
, 0, 50, -2, 85, 120, 0);
447 cairo_translate(cr
, 200, 0);
448 arc3p(cr
, -2, 85, 0, 50, 120, 0);
454 arc3p(cairo_t
*cr
, double x1
, double y1
,
455 double x2
, double y2
, double x3
, double y3
)
458 cairo_path_data_t p
[4];
460 double r
, start
, end
;
466 p
[1].header
.type
= CPML_ARC
;
467 p
[1].header
.length
= 3;
476 cpml_primitive_to_cairo(&arc
, cr
);
478 cairo_set_line_width(cr
, 1.);
481 /* Add an arc generated by cairo, just for reference */
482 if (!cpml_arc_info(&arc
, ¢er
, &r
, &start
, &end
)) {
483 g_warning(_("Unable to get arc info (%lf, %lf) (%lf, %lf) (%lf, %lf)\n"),
484 x1
, y1
, x2
, y2
, x3
, y3
);
489 cairo_arc(cr
, center
.x
, center
.y
, r
-5., start
, end
);
491 cairo_arc_negative(cr
, center
.x
, center
.y
, r
-5., start
, end
);
493 /* Show the inscribed triangle */
494 cairo_move_to(cr
, x1
, y1
);
495 cairo_line_to(cr
, x2
, y2
);
496 cairo_line_to(cr
, x3
, y3
);
498 cairo_set_line_width(cr
, 0.5);
504 intersections(GtkWidget
*widget
, cairo_t
*cr
)
507 CpmlSegment segment1
, segment2
;
508 CpmlPair intersection
;
510 cairo_translate(cr
, 10.5, 120.5);
514 path
= cairo_copy_path(cr
);
516 cairo_set_line_width(cr
, 1.);
519 cpml_segment_from_cairo(&segment1
, path
);
520 cpml_segment_from_cairo(&segment2
, path
);
522 while (cpml_segment_next(&segment2
)) {
523 cpml_segment_put_intersections(&segment1
, &segment2
, 1, &intersection
);
525 cairo_arc(cr
, intersection
.x
, intersection
.y
, 2.5, 0, 2 * M_PI
);
528 cpml_segment_next(&segment1
);
531 cairo_path_destroy(path
);
537 algorithm_changed(GtkRadioButton
*button
, GtkWidget
*area
)
539 const gchar
*button_name
;
540 CpmlCurveOffsetAlgorithm new_algorithm
;
542 if (! gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(button
)))
546 button_name
= gtk_widget_get_name(GTK_WIDGET(button
));
548 if (g_strcmp0(button_name
, "DEFAULT") == 0) {
549 new_algorithm
= CPML_CURVE_OFFSET_ALGORITHM_DEFAULT
;
550 } else if (g_strcmp0(button_name
, "BAIOCA") == 0) {
551 new_algorithm
= CPML_CURVE_OFFSET_ALGORITHM_BAIOCA
;
552 } else if (g_strcmp0(button_name
, "HANDCRAFT") == 0) {
553 new_algorithm
= CPML_CURVE_OFFSET_ALGORITHM_HANDCRAFT
;
555 g_warning("Unknown offset algorithm name (%s)", button_name
);
556 new_algorithm
= CPML_CURVE_OFFSET_ALGORITHM_NONE
;
559 cpml_curve_offset_algorithm(new_algorithm
);
560 gtk_widget_queue_draw(area
);
564 offset_curves(GtkWidget
*widget
, cairo_t
*cr
)
568 cairo_path_t
*path
, *path_copy
;
570 CpmlPrimitive primitive
;
575 /* Add the Bézier curve samples */
576 for (n
= 0; n
< G_N_ELEMENTS(bezier_samples
); ++n
) {
577 bezier
= &bezier_samples
[n
][0];
579 /* The samples are arranged in a 4x? matrix of 200x150 cells */
581 cairo_translate(cr
, 25., 25.);
583 cairo_translate(cr
, -600., 150.);
585 cairo_translate(cr
, 200., 0.);
587 /* Draw the Bézier curve */
588 cairo_move_to(cr
, bezier
[0].x
, bezier
[0].y
);
589 cairo_curve_to(cr
, bezier
[1].x
, bezier
[1].y
,
590 bezier
[2].x
, bezier
[2].y
, bezier
[3].x
, bezier
[3].y
);
592 /* Create a copy, to be used after */
593 path_copy
= cairo_copy_path(cr
);
595 path
= duplicate_and_stroke(cr
);
596 cpml_segment_from_cairo(&segment
, path
);
597 cpml_segment_offset(&segment
, 20.);
598 stroke_and_destroy(cr
, path
);
600 cpml_segment_from_cairo(&segment
, path_copy
);
601 cpml_primitive_from_segment(&primitive
, &segment
);
603 /* Checking cpml_curve_put_pair_at_time and cpml_curve_put_vector_at_time */
604 cairo_set_line_width(cr
, 1.);
605 for (t
= 0; t
< 1; t
+= 0.1) {
606 cpml_curve_put_pair_at_time(&primitive
, t
, &pair
);
607 cpml_curve_put_vector_at_time(&primitive
, t
, &vector
);
608 cpml_vector_set_length(&vector
, 20.);
609 cpml_vector_normal(&vector
);
611 cairo_new_sub_path(cr
);
612 cairo_arc(cr
, pair
.x
, pair
.y
, 2.5, 0, M_PI
*2);
615 cairo_move_to(cr
, pair
.x
, pair
.y
);
616 cairo_line_to(cr
, pair
.x
+ vector
.x
, pair
.y
+ vector
.y
);
620 cairo_path_destroy(path_copy
);
628 offset_segments(GtkWidget
*widget
, cairo_t
*cr
)
634 cairo_translate(cr
, 270.5, -120.5);
636 /* Offset the path samples */
637 for (n
= 0; n
< G_N_ELEMENTS(path_samples
); ++n
) {
639 cairo_translate(cr
, -270., 240.);
641 cairo_translate(cr
, 270., 0.);
644 /* Call the path callback */
645 (path_samples
[n
]) (cr
);
647 path
= duplicate_and_stroke(cr
);
648 cpml_segment_from_cairo(&segment
, path
);
649 cpml_segment_offset(&segment
, 15.);
650 stroke_and_destroy(cr
, path
);
658 circle_callback(cairo_t
*cr
)
660 cairo_new_sub_path(cr
);
661 cairo_arc(cr
, 120., 0., 100., 0., M_PI
*2);
665 piston_callback(cairo_t
*cr
)
667 cairo_path_t
*old_path
, *path
;
668 cairo_matrix_t matrix
;
671 /* Save the previous path, if any */
672 old_path
= cairo_copy_path(cr
);
675 cairo_move_to(cr
, 0., 46.5);
676 cairo_line_to(cr
, 210., 46.5);
677 cairo_line_to(cr
, 222.5, 35.);
678 cairo_line_to(cr
, 270., 35.);
679 cairo_line_to(cr
, 270., 56.);
680 cairo_line_to(cr
, 273., 59.);
681 cairo_line_to(cr
, 302., 59.);
682 cairo_line_to(cr
, 305., 56.);
683 cairo_arc(cr
, 325., 52.5, 20., G_PI
, 3. * G_PI_2
);
684 cairo_line_to(cr
, 400., 32.5);
685 cairo_line_to(cr
, 410., 22.5);
686 cairo_line_to(cr
, 450., 22.5);
687 cairo_arc_negative(cr
,
688 452., 34., 2., G_PI
, G_PI_2
);
689 cairo_line_to(cr
, 460., 36.);
690 cairo_line_to(cr
, 470., 30.);
691 cairo_line_to(cr
, 472., 12.5);
693 /* Mirror a reversed copy of the current path on the y = 0 axis */
694 path
= cairo_copy_path(cr
);
695 cpml_segment_from_cairo(&segment
, path
);
697 cpml_segment_reverse(&segment
);
698 cairo_matrix_init_scale(&matrix
, 1., -1.);
699 cpml_segment_transform(&segment
, &matrix
);
701 /* Join the mirrored path to the old path... */
702 path
->data
[0].header
.type
= CPML_LINE
;
703 cairo_append_path(cr
, path
);
704 cairo_path_destroy(path
);
706 /* ...and close the shape */
707 cairo_close_path(cr
);
709 /* Save the resulting path and clear the path memory */
710 path
= cairo_copy_path(cr
);
713 /* Restore the previous path and reappend the new path */
714 cairo_append_path(cr
, old_path
);
715 cairo_path_destroy(old_path
);
716 cairo_append_path(cr
, path
);
717 cairo_path_destroy(path
);
721 curve1_callback(cairo_t
*cr
)
723 cairo_move_to(cr
, 30., 0.);
724 cairo_curve_to(cr
, 120., 120., 180., 100., 180., 20.);
725 cairo_curve_to(cr
, 180., -20., 50., 40., 150., 40.);
726 cairo_curve_to(cr
, 220., 40., 190., -60., 150., -60.);
727 cairo_curve_to(cr
, 100., -60., 80., -40., 60., -60.);
731 line1_callback(cairo_t
*cr
)
733 cairo_move_to(cr
, 0, -50);
734 cairo_line_to(cr
, 100, 50);
736 cairo_move_to(cr
, 100, -50);
737 cairo_line_to(cr
, 0, 50);
739 cairo_move_to(cr
, 120, -50);
740 cairo_line_to(cr
, 200, -10);
742 cairo_move_to(cr
, 120, 50);
743 cairo_line_to(cr
, 200, 10);
745 cairo_move_to(cr
, 220, 0);
746 cairo_line_to(cr
, 280, 0);
748 cairo_move_to(cr
, 270, -40);
749 cairo_line_to(cr
, 270, 20);
751 cairo_move_to(cr
, 320, 60);
752 cairo_line_to(cr
, 380, 60);
754 cairo_move_to(cr
, 300, -40);
755 cairo_line_to(cr
, 340, 0);
757 cairo_move_to(cr
, 480, 10);
758 cairo_line_to(cr
, 400, 40);
760 cairo_move_to(cr
, 400, 40);
761 cairo_line_to(cr
, 450, -40);