1 files changed, 59 insertions, 0 deletions
diff --git a/src/animation.h b/src/animation.h
new file mode 100644
index 0000000..3064d1b
--- /dev/null
+++ b/src/animation.h
@@ -0,0 +1,59 @@
+/*
+ * animation.h
+ *
+ * Created by buzzert <buzzert@buzzert.net> 2019-01-20
+ */
+
+#pragma once
+#include <stdbool.h>
+#include <time.h>
+
+typedef double anim_time_interval_t;
+
+struct animation_t;
+typedef void(*AnimationCompletion)(struct animation_t *anim, void *context);
+
+typedef enum {
+    _EmptyAnimationType,
+    ACursorAnimation,
+    ALogoAnimation,
+} AnimationType;
+
+typedef struct {
+    AnimationType type;
+
+    bool   cursor_animating;
+    double cursor_fade_direction;
+} CursorAnimation;
+
+typedef struct {
+    AnimationType type;
+
+    bool                 direction; // false: in, true: out
+} LogoAnimation;
+
+typedef union {
+    AnimationType type;
+
+    CursorAnimation cursor_anim;
+    LogoAnimation   logo_anim;
+} Animation;
+
+typedef struct {
+    bool                 completed;
+    anim_time_interval_t start_time;
+
+    AnimationCompletion  completion_func;
+    void                *completion_func_context;
+
+    Animation anim;
+} animation_t;
+
+// Convenience: returns current time as anim_time_interval_t
+anim_time_interval_t anim_now();
+
+// Easing functions
+double anim_qubic_ease_out(double p);
+double anim_quad_ease_out(double p);
+
+