From afaa1a637b8d139a556d3b1a0337f55a32d5e3b6 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Sun, 17 Feb 2013 02:31:32 -0500
Subject: Fix base paths for resources referenced in maps.

---
diff --git a/src/resources/map.c b/src/resources/map.c
index e0c48c0..67dbfd2 100644
--- a/src/resources/map.c
+++ b/src/resources/map.c
@@ -1,5 +1,6 @@
 #include <stdio.h>
 #include <string.h>
+#include <libgen.h>
 #include <ctype.h>
 #include <expat.h>
 #include "map.h"
@@ -10,7 +11,7 @@
 struct resource_table ts_res;
 struct resource_table map_res;
 
-static struct tileset *tileset_get(const char *);
+static struct tileset *tileset_get(const char *, const char *);
 static void XMLCALL tmx_map_start(void *, const char *, const char **);
 static void XMLCALL tmx_map_end(void *, const char *);
 static void XMLCALL tmx_map_el_start(void *, const char *, const char **);
@@ -44,6 +45,7 @@ map_get(const char *path)
 	if (map == NULL) {
 		return NULL;
 	}
+	map->dirname = dirname(strdup(path));
 
 	p = XML_ParserCreate(NULL);
 	if (p == NULL) {
@@ -117,7 +119,7 @@ map_add_tileset(struct map *m, struct tileset *t)
 }
 
 static struct tileset *
-tileset_get(const char *path)
+tileset_get(const char *path, const char *basedir)
 {
 	struct tileset *ts;
 	XML_Parser p;
@@ -136,6 +138,7 @@ tileset_get(const char *path)
 	if (ts == NULL) {
 		return NULL;
 	}
+	ts->dirname = strdup(basedir);
 
 	p = XML_ParserCreate(NULL);
 	if (p == NULL) {
@@ -200,7 +203,6 @@ tmx_map_start(void *pv, const char *name, const char **attr)
 		xml_get_int_attr(p, attr, "height", &m->height, 1);
 		xml_get_int_attr(p, attr, "tilewidth", &m->tilewidth, 1);
 		xml_get_int_attr(p, attr, "tileheight", &m->tileheight, 1);
-		debug("pushing node");
 		xml_node_push(p, m, tmx_map_el_start, tmx_map_end, NULL);
 	} else {
 		xml_unexpected_start_tag(p, name, "map");
@@ -225,7 +227,9 @@ static void XMLCALL
 tmx_map_el_start(void *pv, const char *name, const char **attr)
 {
 	XML_Parser p = (XML_Parser) pv;
+	char *dirname;
 	char *source;
+	char *path;
 	struct tileset *ts;
 
 	debug("<%s> (map child)", name);
@@ -234,11 +238,17 @@ tmx_map_el_start(void *pv, const char *name, const char **attr)
 		/* Not used by engine. */
 		xml_node_push(p, NULL, tmx_unused_start, tmx_unused_end, NULL);
 	} else if (xml_check_tag(name, "tileset")) {
+		dirname = ((struct map *) xml_node_peek(p))->dirname;
 		source = NULL;
 		xml_get_string_attr(p, attr, "source", &source, 0);
 		if (source != NULL) {
 			/* External tilesheet. */
-			ts = tileset_get(source);
+			path = malloc(strlen(dirname) + strlen(source) + 2);
+			if (path == NULL) {
+				return;
+			}
+			sprintf(path, "%s/%s", dirname, source);
+			ts = tileset_get(path, dirname);
 			free(source);
 			xml_node_push(p, ts, tmx_invalid_start,
 					tmx_tilesheetemb_end, NULL);
@@ -248,6 +258,7 @@ tmx_map_el_start(void *pv, const char *name, const char **attr)
 			if (ts == NULL) {
 				return;
 			}
+			ts->dirname = dirname;
 			xml_get_string_attr(p, attr, "name", &ts->name, 1);
 			xml_get_int_attr(p, attr, "tilewidth", &ts->tilewidth,
 					1);
@@ -317,14 +328,22 @@ static void XMLCALL
 tmx_tileset_el_start(void *pv, const char *name, const char **attr)
 {
 	XML_Parser p = (XML_Parser) pv;
+	char *dirname;
 	char *source;
+	char *path;
 	struct image *img;
 
 	debug("<%s> (tileset child)", name);
 
 	if (xml_check_tag(name, "image")) {
+		dirname = ((struct tileset *) xml_node_peek(p))->dirname;
 		xml_get_string_attr(p, attr, "source", &source, 0);
-		img = img_png_get(source);
+		path = malloc(strlen(dirname) + strlen(source) + 2);
+		if (path == NULL) {
+			return;
+		}
+		sprintf(path, "%s/%s", dirname, source);
+		img = img_png_get(path);
 		free(source);
 		xml_node_push(p, img, tmx_invalid_start, tmx_image_end, NULL);
 	} else {
diff --git a/src/resources/map.h b/src/resources/map.h
index 81ee0ec..673a01d 100644
--- a/src/resources/map.h
+++ b/src/resources/map.h
@@ -8,6 +8,8 @@
 
 struct tileset {
 	struct resource res;
+	char *dirname;
+	/* TODO: firstgid shouldn't apply to all uses of a tileset. */
 	int firstgid;
 	char *name;
 	int tilewidth;
@@ -17,6 +19,7 @@ struct tileset {
 };
 struct map {
 	struct resource res;
+	char *dirname;
 	int width;
 	int height;
 	int tilewidth;
--
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