2 * Copyright (C) 2009 Carl Worth
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 3 of the License, or
7 * (at your option) any later version.
9 * This program 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
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see http://www.gnu.org/licenses/ .
17 * Author: Carl Worth <cworth@cworth.org>
20 #define _GNU_SOURCE /* for vasprintf */
27 #include "dvonn-board.h"
29 #define BOARD_X_SIZE 11
30 #define BOARD_Y_SIZE 5
40 typedef struct _dvonn_game dvonn_game_t;
53 dvonn_bool_t has_selected;
57 PangoFontDescription *font;
61 on_delete_event_quit (GtkWidget *widget,
67 /* Returning FALSE allows the default handler for delete-event
68 * to proceed to cleanup the widget. */
72 /* Something like buff */
73 #define BACKGROUND_COLOR 0.89, 0.70, 0.40
75 #define RED_RING_COLOR 0.8, 0.2, 0.2
77 /* Relative to a unit square. */
78 #define RING_OUTER_RADIUS 0.4
79 #define RING_INNER_RADIUS 0.2
80 #define FONT_SIZE (RING_INNER_RADIUS * 1.5)
82 /* XXX: This really should have an interest rectangle. */
84 dvonn_game_update_windows (dvonn_game_t *game)
88 for (i = 0; i < game->num_views; i++)
89 gtk_widget_queue_draw (game->views[i]->window);
92 /* Convert from a board index to a device-pixel coordinate pair, (at
93 * the center of the ring). */
95 layout_board_to_device (layout_t *layout, double *x_ret, double *y_ret)
97 double x = *x_ret, y = *y_ret;
99 *x_ret = layout->x_offset + layout->cell_size *
100 (x + (y - DVONN_BOARD_Y_SIZE/2)/2.0 + 0.5);
101 *y_ret = layout->y_offset + layout->cell_size * (M_SQRT1_2 * y + 0.5);
104 /* Convert from a device-pixel coordinate pair to a board index. */
106 layout_device_to_board (layout_t *layout, int *x_ret, int *y_ret)
108 int x = *x_ret, y = *y_ret;
110 double x1_dev, y1_dev, x2_dev, y2_dev;
111 double dx, dy, d1, d2;
113 /* Because the vertical spacing between adjacent rows is less than
114 * layout->cell_size, the simple calculations here give us two
115 * candidate (x,y) pairs. We then choose the correct one based on
116 * a distance calculation.
118 y1 = (y - layout->y_offset) / (layout->cell_size * M_SQRT1_2);
119 x1 = (double) (x - layout->x_offset) / layout->cell_size - (y1 - DVONN_BOARD_Y_SIZE/2)/2.0;
122 x2 = (double) (x - layout->x_offset) / layout->cell_size - (y2 - DVONN_BOARD_Y_SIZE/2)/2.0;
126 layout_board_to_device (layout, &x1_dev, &y1_dev);
130 layout_board_to_device (layout, &x2_dev, &y2_dev);
134 d1 = sqrt (dx*dx + dy*dy);
138 d2 = sqrt (dx*dx + dy*dy);
150 on_button_press_event (GtkWidget *widget,
151 GdkEventButton *event,
154 view_t *view = user_data;
155 layout_t *layout = &view->layout;
156 dvonn_game_t *game = view->game;
160 /* Ignore double and triple clicks. */
161 if (event->type >= GDK_2BUTTON_PRESS)
166 layout_device_to_board (layout, &x, &y);
168 /* Do nothing for out-of-bounds clicks */
169 if (x < 0 || x >= DVONN_BOARD_X_SIZE ||
170 y < 0 || y >= DVONN_BOARD_Y_SIZE)
175 /* Nor for cells which have array entries that are invalid. */
176 if (game->board.cells[x][y].type == DVONN_CELL_INVALID)
179 if (game->board.phase == DVONN_PHASE_PLACEMENT) {
180 if (dvonn_board_place (&game->board, x, y, &error))
181 dvonn_game_update_windows (game);
183 printf ("Illegal placement %c%d: %s\n",
191 if (! game->has_selected) {
192 if (game->board.cells[x][y].type == game->board.player &&
193 ! dvonn_board_cell_surrounded (&game->board, x, y))
195 game->has_selected = TRUE;
196 game->selected_x = x;
197 game->selected_y = y;
198 dvonn_game_update_windows (game);
203 if (x == game->selected_x && y == game->selected_y)
205 game->has_selected = FALSE;
206 dvonn_game_update_windows (game);
210 if (dvonn_board_move (&game->board,
211 game->selected_x, game->selected_y,
214 game->has_selected = FALSE;
215 dvonn_game_update_windows (game);
218 printf ("Illegal move %c%d%c%d: %s\n",
219 'a' + game->selected_x,
220 game->selected_y + 1,
229 /* Add a unit-sized DVONN-ring path to cr, from (0,0) to (1,1). */
231 ring_path (cairo_t *cr)
233 cairo_new_sub_path (cr);
234 cairo_arc (cr, 0.5, 0.5, RING_OUTER_RADIUS, 0, 2 * M_PI);
235 cairo_arc_negative (cr, 0.5, 0.5, RING_INNER_RADIUS, 2 * M_PI, 0);
238 /* Some helper functions for using pango. */
240 _create_layout (cairo_t *cr, PangoFontDescription *font, const char *text)
244 layout = pango_cairo_create_layout (cr);
245 pango_layout_set_font_description (layout, font);
246 pango_layout_set_text (layout, text, -1);
247 pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER);
252 #define PRINTF_FORMAT(fmt_index, va_index) __attribute__ ((__format__(__printf__, fmt_index, va_index)))
255 _create_layout_vprintf (cairo_t *cr, PangoFontDescription *font, const char *fmt, va_list ap)
260 vasprintf (&text, fmt, ap);
262 layout = _create_layout (cr, font, text);
270 _create_layout_printf (cairo_t *cr, PangoFontDescription *font, const char *fmt, ...)
271 PRINTF_FORMAT (3, 4);
274 _create_layout_printf (cairo_t *cr, PangoFontDescription *font, const char *fmt, ...)
281 layout = _create_layout_vprintf (cr, font, fmt, ap);
289 _destroy_layout (PangoLayout *layout)
291 g_object_unref (layout);
295 _show_layout (cairo_t *cr, PangoLayout *layout)
297 pango_cairo_show_layout (cr, layout);
299 _destroy_layout (layout);
303 on_expose_event_draw (GtkWidget *widget,
304 GdkEventExpose *event,
307 view_t *view = user_data;
308 layout_t *layout = &view->layout;
309 dvonn_game_t *game = view->game;
313 if (layout->width != widget->allocation.width ||
314 layout->height != widget->allocation.height)
318 layout->width = widget->allocation.width;
319 layout->height = widget->allocation.height;
321 x_size = layout->width;
322 if (x_size > layout->height * BOARD_X_SIZE / (1 + M_SQRT1_2 * (BOARD_Y_SIZE-1)))
323 x_size = layout->height * BOARD_X_SIZE / (1 + M_SQRT1_2 * (BOARD_Y_SIZE-1));
325 /* Size must be a multiple of the integer cell_size */
326 layout->cell_size = x_size / BOARD_X_SIZE;
327 x_size = layout->cell_size * BOARD_X_SIZE;
328 y_size = layout->cell_size * (1 + M_SQRT1_2 * (BOARD_Y_SIZE-1));
330 layout->x_offset = (layout->width - x_size) / 2;
331 layout->y_offset = (layout->height - y_size) / 2;
333 if (game->font == NULL) {
334 game->font = pango_font_description_new ();
335 pango_font_description_set_family (game->font, "sans");
337 pango_font_description_set_absolute_size (game->font,
338 FONT_SIZE * PANGO_SCALE);
341 cr = gdk_cairo_create (widget->window);
343 cairo_set_source_rgb (cr, BACKGROUND_COLOR);
346 cairo_translate (cr, layout->x_offset, layout->y_offset);
347 cairo_scale (cr, layout->cell_size, layout->cell_size);
349 for (y = 0; y < BOARD_Y_SIZE; y++) {
350 for (x = 0; x < BOARD_X_SIZE; x++) {
353 cell = game->board.cells[x][y];
354 if (cell.type == DVONN_CELL_INVALID)
359 x + (y - DVONN_BOARD_Y_SIZE/2) / 2.0,
361 if (cell.contains_red && cell.type != DVONN_CELL_RED) {
362 cairo_new_sub_path (cr);
363 cairo_arc (cr, 0.5, 0.5,
364 (RING_INNER_RADIUS + RING_OUTER_RADIUS)/2.0,
366 cairo_set_source_rgb (cr, RED_RING_COLOR);
371 case DVONN_CELL_WHITE:
372 cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
374 case DVONN_CELL_BLACK:
375 cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
378 cairo_set_source_rgb (cr, RED_RING_COLOR);
380 case DVONN_CELL_EMPTY:
382 cairo_set_source_rgba (cr, 0.0, 0.0, 0.2, 0.1);
385 if (game->has_selected &&
386 x == game->selected_x &&
387 y == game->selected_y)
389 cairo_fill_preserve (cr);
390 cairo_set_source_rgba (cr, 0.2, 0.2, 1.0, 0.4);
394 if (game->board.cells[x][y].height > 1) {
397 0.5 - 0.7 * RING_INNER_RADIUS * cos (M_PI_4),
398 0.5 - 1.2 * RING_INNER_RADIUS * sin (M_PI_4));
399 height = _create_layout_printf (cr, game->font, "%d",
400 game->board.cells[x][y].height);
401 _show_layout (cr, height);
414 dvonn_game_init (dvonn_game_t *game)
419 game->has_selected = FALSE;
421 dvonn_board_init (&game->board);
427 view_init (view_t *view, dvonn_game_t *game, GtkWidget *window)
430 view->window = window;
432 view->layout.width = 0;
433 view->layout.height = 0;
437 dvonn_game_create_view (dvonn_game_t *game)
441 GtkWidget *drawing_area;
443 window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
445 view = malloc (sizeof (view_t));
447 fprintf (stderr, "Out of memory.\n");
452 game->views = realloc (game->views,
453 game->num_views * sizeof (view_t *));
454 if (game->views == NULL) {
455 fprintf (stderr, "Out of memory.\n");
458 game->views[game->num_views - 1] = view;
460 view_init (view, game, window);
462 gtk_window_set_default_size (GTK_WINDOW (window), 780, 251);
464 g_signal_connect (window, "delete-event",
465 G_CALLBACK (on_delete_event_quit), NULL);
467 drawing_area = gtk_drawing_area_new ();
469 gtk_container_add (GTK_CONTAINER (window), drawing_area);
471 g_signal_connect (drawing_area, "expose-event",
472 G_CALLBACK (on_expose_event_draw), view);
474 gtk_widget_add_events (drawing_area, GDK_BUTTON_PRESS_MASK);
475 g_signal_connect (drawing_area, "button-press-event",
476 G_CALLBACK (on_button_press_event), view);
478 gtk_widget_show_all (window);
482 main (int argc, char *argv[])
486 dvonn_game_init (&game);
488 gtk_init (&argc, &argv);
490 /* Create two views of the game (one for each player) */
491 dvonn_game_create_view (&game);
492 dvonn_game_create_view (&game);