1 files changed, 11 insertions, 0 deletions

diff --git a/include/isogfx/asset.h b/include/isogfx/asset.h
index 6050500..361ffcd 100644
--- a/include/isogfx/asset.h
+++ b/include/isogfx/asset.h
@@ -43,6 +43,16 @@ typedef struct Ts_TileSet {
 // Tile map (TM) file format.
 // -----------------------------------------------------------------------------
 
+typedef enum Tm_Orientation {
+  Tm_Orthogonal = 0,
+  Tm_Isometric  = 1,
+} Tm_Orientation;
+
+typedef struct Tm_Flags {
+  Tm_Orientation orientation : 1;
+  int            unused      : 15;
+} Tm_Flags;
+
 typedef struct Tm_Layer {
   Tile tiles[1]; // Count: world_width * world_height.
 } Tm_Layer;
@@ -54,6 +64,7 @@ typedef struct Tm_Map {
   uint16_t base_tile_width;
   uint16_t base_tile_height;
   uint16_t num_layers;
+  uint16_t flags;    // Tm_flagsFlags
   Tm_Layer layers[]; // Count: num_layers.
 } Tm_Map;