From 4c4ffc1b84ada5dc47f9d36e9154564b68ff7fed Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Tue, 11 Jul 2023 23:11:21 +0100
Subject: Add gol/silver keys and door logic

---
 src/map.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 60 insertions(+), 3 deletions(-)

(limited to 'src/map.c')

diff --git a/src/map.c b/src/map.c
index 5599ae9..4aafdca 100644
--- a/src/map.c
+++ b/src/map.c
@@ -7,6 +7,7 @@
 #include "data.h"
 
 #include "entities.h"
+#include "effect.h"
 #include "player.h"
 #include "snake.h"
 #include "bat.h"
@@ -17,7 +18,7 @@
 #include "map.h"
 
 /* current map; set via map_init */
-static const uint8_t *cmap;
+static  uint8_t cmap[MAP_W * MAP_H];
 static uint8_t gold[MAP_W * MAP_H];
 static uint8_t total_gold;
 
@@ -30,14 +31,17 @@ static void (* const init[])(Entity *) =
     pickup_time_init,
     pickup_bonus_init,
     pickup_pickaxe_init,
+    pickup_goldkey_init,
+    pickup_silverkey_init,
 };
 
 void map_init(const uint8_t map[])
 {
-    cmap = map;
+    /* make a copy of the map data in RAM */
+    memcpy(cmap, map, MAP_W * MAP_H);
 
     /* make a copy of the gold data in RAM */
-    memcpy(gold, cmap + MAP_W * MAP_H, MAP_W * MAP_H);
+    memcpy(gold, map + MAP_W * MAP_H, MAP_W * MAP_H);
 
     /* count how many pieces of gold on this map */
     total_gold = 0;
@@ -154,6 +158,59 @@ uint8_t map_update_gold(uint16_t x, uint16_t y)
     return 0;
 }
 
+static void map_open_key(uint8_t top, uint8_t bottom)
+{
+    Rect src = { 0, 0, 160, 48 };
+    Rect dst = { 0, 0, 16, 8 };
+
+    blit_target(TARGET_BUFFER);
+
+    for (uint8_t y = 0; y < MAP_H; y++)
+        for (uint8_t x = 0; x < MAP_W; x++)
+        {
+            uint8_t t = cmap[x + y * MAP_W];
+
+            if (t == top || t == bottom)
+            {
+                /* not solid */
+                cmap[x + y * MAP_W] = 0;
+                cmap[x + 1 + y * MAP_W] = 0;
+
+                dst.x = x * MAP_TILE_W;
+                dst.y = y * MAP_TILE_H + MAP_OFFS_Y;
+
+                /* top */
+                if (t == top)
+                {
+                    src.x = 64;
+                    src.y = 0;
+
+                    effect_out_new(x * MAP_TILE_W, y * MAP_TILE_H);
+                }
+                else
+                {
+                    /* bottom */
+                    src.x = 32;
+                    src.y = 8;
+                }
+                blitrc(binary_tiles_start, &src, &dst);
+                continue;
+            }
+        }
+
+    blit_target(TARGET_SCREEN);
+}
+
+void map_open_goldkey()
+{
+    map_open_key(45, 65);
+}
+
+void map_open_silverkey()
+{
+    map_open_key(47, 67);
+}
+
 uint8_t map_is_complete()
 {
     return total_gold == 0;
-- 
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