Added timeline

include/dawn/dawn.h

@@ -6,10 +6,9 @@
 #pragma once
 #include "libs.h"
 
-// Animation
-#include "animation/easing.h"
-
 // Display / Rendering
+#include "display/animation/easing.h"
+#include "display/animation/timeline.h"
 #include "display/debug/grid.h"
 
 #include "display/gui/bitmapfont.h"

include/dawn/display/animation/easing.h

@@ -5,7 +5,6 @@
  * https://opensource.org/licenses/MIT
  */
 #pragma once
-#include "../libs.h"
 
 /**
  * Returns the ease time for a given real time duration span.

include/dawn/display/animation/timeline.h

@@ -0,0 +1,55 @@
+/**
+ * Copyright (c) 2021 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "../../libs.h"
+
+/** Type forwarder for timeline_t */
+typedef struct _timeline_t timeline_t;
+
+/** Callback for when a timeline event occurs */
+typedef void timelinecallback_t(timeline_t*);
+
+typedef struct test_t {
+  /**
+   * The time that this action should occur within the timeline
+   * set to 0 or less to start immediately.
+   */
+  float start;
+
+  /**
+   * The duration of the action, this will decide for how long onDuration will
+   * be called for, and when onEnd should be called.
+   * Set to a negative number to have this continue forever.
+   * Set to 0 to only fire the onStart. 
+   * onStart can fire with either onDuration and onEnd on the same frame, but
+   * onEnd and onDuration cannot fire the same frame.
+   */
+  float duration;
+
+  timelinecallback_t *onStart;
+  timelinecallback_t *onDuration;
+  timelinecallback_t *onEnd;
+} timelineaction_t;
+
+typedef struct _timeline_t {
+  /** The current time as far as the timeline is concerned */
+  float current;
+  
+  /** The time of the last "frame" as far as the timeline is concerned */
+  float previous;
+
+  /** The frame time diff, essentially current = previous + diff */
+  float diff;
+
+  /** User pointer, allows you to point to some other data */
+  void *user;
+
+  /** Actions within the timeline */
+  timelineaction_t actions[128];
+  uint8_t actionCount;
+} timeline_t;