From f158a79d0e8a2158f843ecfc5d7eaaa620828679 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Sun, 17 Feb 2013 20:44:32 -0500
Subject: Support collision and unknown map layers.

---
diff --git a/src/main.c b/src/main.c
index 3512535..fa7c7f6 100644
--- a/src/main.c
+++ b/src/main.c
@@ -15,7 +15,7 @@ main(void)
 
 	init();
 
-	map = map_get("data/forest1.simple.tmx");
+	map = map_get("data/forest1.tmx");
 	debug("Map dimensions: %dx%d", map->width, map->height);
 	for (ts = map->tilesets_head; ts != NULL; ts = ts->next) {
 		debug("Tileset name: %s", ts->tileset->name);
diff --git a/src/resources/map.c b/src/resources/map.c
index 67b00cb..2cc2f2a 100644
--- a/src/resources/map.c
+++ b/src/resources/map.c
@@ -155,6 +155,8 @@ map_get_layer(struct map *m, const char *name)
 		return &m->layers[LAYER_CHAR_TOP];
 	} else if (strcmp(name, "obj-high") == 0) {
 		return &m->layers[LAYER_OBJ_HIGH];
+	} else if (strcmp(name, "collision") == 0) {
+		return &m->layers[LAYER_COLLISION];
 	} else if (strcmp(name, "weather") == 0) {
 		return &m->layers[LAYER_WEATHER];
 	} else {
@@ -355,8 +357,14 @@ tmx_map_el_start(void *pv, const char *name, const char **attr)
 		xml_get_string_attr(p, attr, "name", &ly_name, 1);
 		ly = map_get_layer(m, ly_name);
 		free(ly_name);
-		ly->map = m;
-		xml_node_push(p, ly, tmx_layer_el_start, tmx_layer_end, NULL);
+		if (ly != NULL) {
+			ly->map = m;
+			xml_node_push(p, ly, tmx_layer_el_start, tmx_layer_end,
+					NULL);
+		} else {
+			xml_node_push(p, NULL, tmx_unused_start, tmx_layer_end,
+					NULL);
+		}
 	} else if (xml_check_tag(name, "objectgroup")) {
 		xml_node_push(p, m, tmx_objectgroup_el_start,
 				tmx_objectgroup_end, NULL);
diff --git a/src/resources/map.h b/src/resources/map.h
index ba264de..02733bc 100644
--- a/src/resources/map.h
+++ b/src/resources/map.h
@@ -12,6 +12,7 @@ enum layer_id {
 	LAYER_OBJ_MID,
 	LAYER_CHAR_TOP,
 	LAYER_OBJ_HIGH,
+	LAYER_COLLISION,
 	LAYER_WEATHER,
 	LAYERS_MAX
 };
--
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