1 /* Pioneers - Implementation of the excellent Settlers of Catan board game.
2 * Go buy a copy.
3 *
4 * Copyright (C) 1999 Dave Cole
5 * Copyright (C) 2003 Bas Wijnen <shevek@fmf.nl>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "config.h"
23 #include <math.h>
24 #include <gdk/gdk.h>
25
26 #include "polygon.h"
27
poly_offset(Polygon * poly,gint x_offset,gint y_offset)28 void poly_offset(Polygon * poly, gint x_offset, gint y_offset)
29 {
30 int idx;
31 GdkPoint *points;
32
33 for (idx = 0, points = poly->points; idx < poly->num_points;
34 idx++, points++) {
35 points->x += x_offset;
36 points->y += y_offset;
37 }
38 }
39
poly_bound_rect(const Polygon * poly,int pad,GdkRectangle * rect)40 void poly_bound_rect(const Polygon * poly, int pad, GdkRectangle * rect)
41 {
42 int idx;
43 GdkPoint tl;
44 GdkPoint br;
45 GdkPoint *points;
46
47 points = poly->points;
48 tl = points[0];
49 br = points[0];
50 for (idx = 1, points++; idx < poly->num_points; idx++, points++) {
51 if (points->x < tl.x)
52 tl.x = points->x;
53 else if (points->x > br.x)
54 br.x = points->x;
55 if (points->y < tl.y)
56 tl.y = points->y;
57 else if (points->y > br.y)
58 br.y = points->y;
59 }
60 rect->x = tl.x - pad;
61 rect->y = tl.y - pad;
62 rect->width = br.x - tl.x + pad + 1;
63 rect->height = br.y - tl.y + pad + 1;
64 }
65
poly_draw(cairo_t * cr,gboolean filled,const Polygon * poly)66 void poly_draw(cairo_t * cr, gboolean filled, const Polygon * poly)
67 {
68 gint i;
69
70 if (poly->num_points > 0) {
71 cairo_move_to(cr, poly->points[poly->num_points - 1].x,
72 poly->points[poly->num_points - 1].y);
73 for (i = 0; i < poly->num_points; i++) {
74 cairo_line_to(cr, poly->points[i].x,
75 poly->points[i].y);
76 }
77 if (filled) {
78 cairo_fill(cr);
79 } else {
80 cairo_stroke(cr);
81 }
82 }
83 }
84
poly_draw_with_border(cairo_t * cr,const GdkRGBA * border_color,const Polygon * poly)85 void poly_draw_with_border(cairo_t * cr,
86 const GdkRGBA * border_color,
87 const Polygon * poly)
88 {
89 poly_draw(cr, TRUE, poly);
90 gdk_cairo_set_source_rgba(cr, border_color);
91 poly_draw(cr, FALSE, poly);
92 }
93