add bitmap conversion from aseprite ico, add boot animation

main/liquid/gui.c

@@ -53,11 +53,10 @@ static void __attribute__((noreturn)) gui_thread(void *arg) {
     uint32_t last_wheel_time = 0;
 
     while (1) {
+        bool want_repaint = false;
         uint32_t value = 0;
         xTaskNotifyWait(0, ULONG_MAX, &value, pdMS_TO_TICKS(10));
 
-        bool want_repaint = false;
-
         if (value & 0b10000) {
             // TICK
             want_repaint |= Liquid_handleTick(liquid);
@@ -72,6 +71,7 @@ static void __attribute__((noreturn)) gui_thread(void *arg) {
         if (value & 0b11) {
             uint32_t time = xTaskGetTickCount();
             uint32_t increment = 1;
+            // wheel delta changes with speed
             if (last_wheel_time != 0) {
                 uint32_t ela = time - last_wheel_time;
                 if (ela < pdMS_TO_TICKS(20)) {

main/liquid/liquid.c

@@ -9,6 +9,8 @@
 static const char *TAG = "Liquid";
 
 extern struct Scene *NewScene_Root(void);
+static struct SceneEvent Liquid_initTopScene(struct Liquid *container);
+static bool processReturnValue(struct Liquid *container, struct SceneEvent result);
 
 struct RunningScene {
     struct Scene *scene;
@@ -27,7 +29,6 @@ static struct SceneEvent Default_onChildReturn(struct Scene *scene, uint32_t tag
 static void addChild(struct Liquid *container, struct Scene *child) {
     struct RunningScene *elm = calloc(1, sizeof(struct RunningScene));
     if (!child->onChildReturn) child->onChildReturn = Default_onChildReturn;
-    assert(child->paint != NULL);
     elm->scene = child;
     SLIST_INSERT_HEAD(&container->stack, elm, next);
 }
@@ -36,7 +37,12 @@ struct Liquid *Liquid_start(void) {
     struct Liquid *container = calloc(1, sizeof(struct Liquid));
 
     addChild(container, NewScene_Root());
-    Liquid_paint(container);
+
+    struct SceneEvent result = Liquid_initTopScene(container);
+
+    if (processReturnValue(container, result)) {
+        Liquid_paint(container);
+    }
     return container;
 }
 
@@ -69,7 +75,7 @@ static struct SceneEvent handleSceneEvent(struct Liquid *container, struct Scene
             newScene = event.open.scene;
             newScene->tag = event.open.tag;
             addChild(container, newScene);
-            return SceneEvent_Repaint();
+            return Liquid_initTopScene(container);
 
         case SceneEventKind_RequestRepaint:
         case SceneEventKind_None:
@@ -79,6 +85,9 @@ static struct SceneEvent handleSceneEvent(struct Liquid *container, struct Scene
     }
 }
 
+/**
+ * returns true if repaint is requested
+ */
 static bool processReturnValue(struct Liquid *container, struct SceneEvent result) {
     bool repaint = false;
     while (result.kind != SceneEventKind_None) {
@@ -122,10 +131,23 @@ bool Liquid_handleTick(struct Liquid *container) {
     }
 }
 
+static struct SceneEvent Liquid_initTopScene(struct Liquid *container) {
+    struct RunningScene *topmost = SLIST_FIRST(&container->stack);
+    assert(topmost != NULL);
+    assert(topmost->scene != NULL);
+    if (topmost->scene->init) {
+        return topmost->scene->init(topmost->scene);
+    } else {
+        return SceneEvent_Repaint();
+    }
+}
+
 void Liquid_paint(struct Liquid *container) {
     struct RunningScene *topmost = SLIST_FIRST(&container->stack);
     assert(topmost != NULL);
-    topmost->scene->paint(topmost->scene);
+    if (topmost->scene->paint) {
+        topmost->scene->paint(topmost->scene);
+    }
 
     LCD_updateDisplay();
 }

main/liquid/scene_type.h

@@ -40,6 +40,14 @@ typedef struct SceneEvent (*Scene_onChildReturn_t)(struct Scene *scene, uint32_t
  */
 typedef struct SceneEvent (*Scene_onTick_t)(struct Scene *scene);
 
+/**
+ * Scene::init fp type
+ *
+ * @param scene - self
+ * @return follow-up scene event, can be SceneEvent_None() if not used.
+ */
+typedef struct SceneEvent (*Scene_init_t)(struct Scene *scene);
+
 /**
  * Scene::paint fp type
  *
@@ -65,6 +73,12 @@ struct Scene {
      */
     uint32_t tag;
 
+    /**
+     * Init function, called once after the scene has been opened.
+     * Nullable field.
+     */
+    Scene_init_t init;
+
     /**
      * Handle input event.
      * Can return a follow-up scene event, e.g. repaint request.
@@ -90,8 +104,7 @@ struct Scene {
     /**
      * Draw the scene to the LCD buffer.
      * DO NOT write to the display yet, it will be done by the GUI engine.
-     *
-     * MANDATORY FIELD
+     * Nullable field.
      */
     Scene_paint_t paint;