1 files changed, 18 insertions, 0 deletions
diff --git a/src/types.c b/src/types.c
index fe72e13..cbd9315 100644
--- a/src/types.c
+++ b/src/types.c
@@ -4,6 +4,7 @@
 #define GRIDWIDTH 20
 #define GRIDHEIGHT 16
 #define TICK_LENGTH 200
+#define GRID_OFFSET_X 256
 
 typedef struct {
 	unsigned char r, g, b, a;
@@ -42,15 +43,32 @@ enum {
 	N_COLORS,
 };
 
+enum {
+	BUTTON_RETRY,
+	BUTTON_BACK,
+	N_BUTTONS,
+};
+
 typedef struct {
 	int width, height;
 } UI;
 
+typedef enum {
+	BUTTON_STATE_IDLE,
+	BUTTON_STATE_HOVERED,
+	BUTTON_STATE_PRESSED
+} ButtonState;
+
+typedef struct {
+	int x, y, w, h;
+} Button;
+
 typedef struct {
 	uint64_t lastTick;
 	char playing;
 	int grid[GRIDWIDTH * GRIDHEIGHT];
 	int goalx, goaly;
+	ButtonState buttonStates[N_BUTTONS];
 } State;
 
 // Mirror these in src/index.html.in