static void game_resize(Widget w, void *data, void *cb_data)
{
if (XtIsRealized(w))
- x11_redraw_game(data);
+ x11_redraw_game(data, -1);
}
static void goal_resize(Widget w, void *data, void *cb_data)
{
if (XtIsRealized(w))
- x11_redraw_goal(data);
+ x11_redraw_goal(data, -1);
+}
+
+static void do_input_move(struct app_state *state, int x, int y)
+{
+ uint_least32_t *gp = state->board.game, prev[4];
+
+ memcpy(prev, gp, sizeof prev);
+ if (game_do_move(&state->board, x, y) == 0) {
+ uint_least32_t mask;
+
+ if (game_check_goal(&state->board)) {
+ printf("You win!\n");
+ game_finish(&state->board);
+ }
+
+ /* Figure out which tiles changed */
+ prev[0] ^= gp[0];
+ prev[1] ^= gp[1];
+ prev[2] ^= gp[2];
+ mask = prev[0] | prev[1] | prev[2];
+
+ x11_redraw_game(state, mask);
+ }
}
static void game_input(Widget w, void *data, void *cb_data)
XmNheight, &height,
(char *)NULL);
x = click->x / (width/5);
- y = click->y / (width/5);
+ y = click->y / (height/5);
}
if (x > 4 || y > 4)
return;
- if (game_do_move(&state->board, x, y) == 0) {
- if (game_check_goal(&state->board)) {
- printf("You win!\n");
- game_finish(&state->board);
- }
+ do_input_move(state, x, y);
+}
- x11_redraw_game(state);
- }
+/* Figure out which tiles intersect a rectangle. */
+static uint_fast32_t
+expose_mask(int rect_x, int rect_y, int rect_w, int rect_h,
+ int tile_w, int tile_h)
+{
+ return board_right(rect_x / tile_w)
+ & board_below(rect_y / tile_h)
+ & board_above((rect_y + rect_h - 1) / tile_h)
+ & board_left((rect_x + rect_w - 1) / tile_w);
+}
+
+static void game_expose(Widget w, void *data, void *cb_data)
+{
+ XmDrawingAreaCallbackStruct *cbs = cb_data;
+ XExposeEvent *e = &cbs->event->xexpose;
+ Dimension width, height;
+ uint_fast32_t mask;
+
+ XtVaGetValues(w, XmNwidth, &width, XmNheight, &height, (char *)NULL);
+ if (!(width /= 5) || !(height /= 5))
+ return;
+
+ mask = expose_mask(e->x, e->y, e->width, e->height, width, height);
+ x11_redraw_game(data, mask);
+}
+
+static void goal_expose(Widget w, void *data, void *cb_data)
+{
+ XmDrawingAreaCallbackStruct *cbs = cb_data;
+ XExposeEvent *e = &cbs->event->xexpose;
+ Dimension width, height;
+ uint_fast32_t mask;
+
+ XtVaGetValues(w, XmNwidth, &width, XmNheight, &height, (char *)NULL);
+ if (!(width /= 3) || !(height /= 3))
+ return;
+
+ mask = expose_mask(e->x, e->y, e->width, e->height, width, height);
+ x11_redraw_goal(data, mask);
}
void ui_initialize(struct app_state *state, Widget shell)
state->game = XtNameToWidget(shell, "*gameCanvas");
XtAddCallback(state->game, XmNresizeCallback, game_resize, state);
- XtAddCallback(state->game, XmNexposeCallback, game_resize, state);
+ XtAddCallback(state->game, XmNexposeCallback, game_expose, state);
XtAddCallback(state->game, XmNinputCallback, game_input, state);
state->goal = XtNameToWidget(shell, "*goalCanvas");
XtAddCallback(state->goal, XmNresizeCallback, goal_resize, state);
- XtAddCallback(state->goal, XmNexposeCallback, goal_resize, state);
+ XtAddCallback(state->goal, XmNexposeCallback, goal_expose, state);
}