1 files changed, 24 insertions, 0 deletions

diff --git a/src/gba-buttons.c b/src/gba-buttons.c
index 0f6218a..ee6458d 100644
--- a/src/gba-buttons.c
+++ b/src/gba-buttons.c
@@ -227,3 +227,27 @@ u32 gba_btn_b_data[112][8] = {
     {0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000},
     {0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000},
 };
+
+typedef enum {GBA_BTN_STATE_IDLE, GBA_BTN_STATE_PRESSED} GbaBtnState;
+typedef struct SpriteAnimation {
+    size_t *tile_offsets;
+    size_t n_frames;
+} SpriteAnimation;
+
+static size_t gba_btn_state_idle[] = {0};
+static size_t gba_btn_state_pressed[] = {0, 16, 16, 32, 32, 48, 48, 64, 64, 80, 96};
+
+SpriteAnimation anim_idle = {
+    .tile_offsets = &gba_btn_state_idle,
+    .n_frames = sizeof(gba_btn_state_idle) / sizeof(size_t),
+};
+
+SpriteAnimation anim_pressed = {
+    .tile_offsets = &gba_btn_state_pressed,
+    .n_frames = sizeof(gba_btn_state_pressed) / sizeof(size_t),
+};
+
+SpriteAnimation *animation_states[] = {
+    &anim_idle,
+    &anim_pressed,
+};