Reintroduced color support for ncurses version

.gitignore

@@ -1,2 +1,3 @@
-/2048*
+2048*
+*.o
 *.core

man/2048.1

@@ -51,7 +51,7 @@ Set the rate at which blocks are spawned. Default is 1.
 Set the target end condition. Default is 2048.
 
 .SH AUTHORS
-Originally written by Tiehuis.
+Originally written by Marc Tiehuis.
 All contributions can be found at \fIhttps://github.com/Tiehuis/2048-cli\fR.
 
 .SH COPYRIGHT

src/gfx_curses.c

@@ -8,6 +8,8 @@
 #define GFX_EXTRA_RIGHT case KEY_RIGHT:
 #define GFX_EXTRA_LEFT  case KEY_LEFT:
 
+#define NUMBER_OF_COLORS 7
+
 #define iterate(n, expression)\
     do {\
         int i;\
@@ -32,9 +34,32 @@ struct gfx_state* gfx_init(struct gamestate *g)
     s->window_width  = g->opts->grid_width * (g->print_width + 2) + 1;
     s->window = newwin(s->window_height, s->window_width, 1, 1);
     keypad(s->window, TRUE);
+
+    if (g->opts->enable_color && has_colors()) {
+        start_color();
+
+        int x = 0;
+        init_pair(x++, 1, 0);
+        init_pair(x++, 2, 0);
+        init_pair(x++, 3, 0);
+        init_pair(x++, 4, 0);
+        init_pair(x++, 5, 0);
+        init_pair(x++, 6, 0);
+        init_pair(x++, 7, 0);
+        char dummy[x == NUMBER_OF_COLORS ? 1 : -1];
+    }
+
     return s;
 }
 
+static int int_log2(int n)
+{
+    int k = 0;
+    while (n)
+        ++k, n /= 2;
+    return k;
+}
+
 void gfx_draw(struct gfx_state *s, struct gamestate *g)
 {
     if (g->score_last)
@@ -54,7 +79,9 @@ void gfx_draw(struct gfx_state *s, struct gamestate *g)
 
         for (x = 0; x < g->opts->grid_width; ++x) {
             if (g->grid[x][y]) {
+                wattron(s->window, COLOR_PAIR(int_log2(g->grid[x][y]) % NUMBER_OF_COLORS));
                 mvwprintw(s->window, ypos, xpos, "%*d", g->print_width, g->grid[x][y]);
+                wattroff(s->window, COLOR_PAIR(int_log2(g->grid[x][y]) % NUMBER_OF_COLORS));
                 mvwprintw(s->window, ypos, xpos + g->print_width, " |");
             }
             else {

src/main.c

@@ -47,6 +47,7 @@ get_new_key:;
 
         /* Game will only end if 0 moves available */
         if (game_running) {
+            /* Maybe change this behaviour so if we don't move, we still generate a block */
             if (gamestate_tick(s, g, direction, g->opts->animate ? draw_then_sleep : NULL))
                 gamestate_new_block(g);