Add support for tileset objectalignment

baylej · Jan 17, 2021 · d3509b6 · d3509b6
1 parent 52ebed9
commit d3509b6
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Showing 5 changed files with 71 additions and 0 deletions.
diff --git a/doc/src/datastructure.rst b/doc/src/datastructure.rst
@@ -116,6 +116,33 @@ Enumerations
    | SA_Y         | y axis.                                    |
    +--------------+--------------------------------------------+
 
+.. c:type:: enum tmx_obj_alignment
+
+   Controls the alignment of tiles.
+   When unspecified, tile objects use OA_BOTTOMLEFT in orthogonal mode and OA_BOTTOM in isometric mode (see :c:type:`tmx_map_orient`).
+
+   +----------------+----------------------------------+
+   | Object align   | Description                      |
+   +================+==================================+
+   | OA_NONE        | Object alignment is unspecified. |
+   +----------------+----------------------------------+
+   | OA_TOP         | Top.                             |
+   +----------------+----------------------------------+
+   | OA_LEFT        | Left.                            |
+   +----------------+----------------------------------+
+   | OA_BOTTOM      | Bottom.                          |
+   +----------------+----------------------------------+
+   | OA_RIGHT       | Right.                           |
+   +----------------+----------------------------------+
+   | OA_TOPLEFT     | Top-Left.                        |
+   +----------------+----------------------------------+
+   | OA_TOPRIGHT    | Top-Right.                       |
+   +----------------+----------------------------------+
+   | OA_BOTTOMLEFT  | Bottom-Left.                     |
+   +----------------+----------------------------------+
+   | OA_BOTTOMRIGHT | Bottom-Right.                    |
+   +----------------+----------------------------------+
+
 .. c:type:: enum tmx_layer_type
 
    Type of :term:`layer`.
@@ -459,6 +486,10 @@ you can access everything.
 
       Vertical offset in pixels, a positive value shifts the drawing of tiles down.
 
+   .. c:member:: enum tmx_obj_alignment
+
+      Controls the alignment of tiles, see :c:type:`tmx_obj_alignment`.
+
    .. c:member:: unsigned int tilecount
 
       The number of tiles in this tileset, length of the :c:member:`tmx_tileset.tiles` array.

diff --git a/src/tmx.h b/src/tmx.h
@@ -50,6 +50,7 @@ enum tmx_map_orient {O_NONE, O_ORT, O_ISO, O_STA, O_HEX};
 enum tmx_map_renderorder {R_NONE, R_RIGHTDOWN, R_RIGHTUP, R_LEFTDOWN, R_LEFTUP};
 enum tmx_stagger_index {SI_NONE, SI_EVEN, SI_ODD};
 enum tmx_stagger_axis {SA_NONE, SA_X, SA_Y};
+enum tmx_obj_alignment {OA_NONE, OA_TOP, OA_LEFT, OA_BOTTOM, OA_RIGHT, OA_CENTER, OA_TOPLEFT, OA_TOPRIGHT, OA_BOTTOMLEFT, OA_BOTTOMRIGHT};
 enum tmx_layer_type {L_NONE, L_LAYER, L_OBJGR, L_IMAGE, L_GROUP};
 enum tmx_objgr_draworder {G_NONE, G_INDEX, G_TOPDOWN};
 enum tmx_obj_type {OT_NONE, OT_SQUARE, OT_POLYGON, OT_POLYLINE, OT_ELLIPSE, OT_TILE, OT_TEXT, OT_POINT};
@@ -130,6 +131,7 @@ struct _tmx_ts { /* <tileset> and <tileoffset> */
 	unsigned int tile_width, tile_height;
 	unsigned int spacing, margin;
 	int x_offset, y_offset; /* tileoffset */
+	enum tmx_obj_alignment objectalignment;
 
 	unsigned int tilecount;
 	tmx_image *image;

diff --git a/src/tmx_utils.c b/src/tmx_utils.c
@@ -436,6 +436,38 @@ enum tmx_map_renderorder parse_renderorder(const char *renderorder) {
 	return R_NONE;
 }
 
+/* "topleft" -> OA_TOPLEFT */
+enum tmx_obj_alignment parse_obj_alignment(const char *objalign_str) {
+	if (!strcmp("top", objalign_str)) {
+		return OA_TOP;
+	}
+	if (!strcmp("left", objalign_str)) {
+		return OA_LEFT;
+	}
+	if (!strcmp("bottom", objalign_str)) {
+		return OA_BOTTOM;
+	}
+	if (!strcmp("right", objalign_str)) {
+		return OA_RIGHT;
+	}
+	if (!strcmp("center", objalign_str)) {
+		return OA_CENTER;
+	}
+	if (!strcmp("topleft", objalign_str)) {
+		return OA_TOPLEFT;
+	}
+	if (!strcmp("topright", objalign_str)) {
+		return OA_TOPRIGHT;
+	}
+	if (!strcmp("bottomleft", objalign_str)) {
+		return OA_BOTTOMLEFT;
+	}
+	if (!strcmp("bottomright", objalign_str)) {
+		return OA_BOTTOMRIGHT;
+	}
+	return OA_NONE;
+}
+
 /* "index" -> G_INDEX */
 enum tmx_objgr_draworder parse_objgr_draworder(const char *draworder) {
 	if (draworder == NULL || !strcmp(draworder, "topdown")) {

diff --git a/src/tmx_utils.h b/src/tmx_utils.h
@@ -96,6 +96,7 @@ int mk_map_tile_array(tmx_map *map);
 
 enum tmx_map_orient parse_orient(const char *orient_str);
 enum tmx_map_renderorder parse_renderorder(const char *renderorder);
+enum tmx_obj_alignment parse_obj_alignment(const char *objalign_str);
 enum tmx_objgr_draworder parse_objgr_draworder(const char *draworder);
 enum tmx_stagger_index parse_stagger_index(const char *staggerindex);
 enum tmx_stagger_axis parse_stagger_axis(const char *staggeraxis);

diff --git a/src/tmx_xml.c b/src/tmx_xml.c
@@ -809,6 +809,11 @@ static int parse_tileset(xmlTextReaderPtr reader, tmx_tileset *ts_addr, tmx_reso
 		tmx_free_func(value);
 	}
 
+	if ((value = (char*)xmlTextReaderGetAttribute(reader, (xmlChar*)"objectalignment"))) { /* objectalignment */
+		ts_addr->objectalignment = parse_obj_alignment(value);
+		tmx_free_func(value);
+	}
+
 	if (!(ts_addr->tiles = alloc_tiles(ts_addr->tilecount))) return 0;
 
 	/* Parse each child */