midground layer

docs/event-behaviors.md

@@ -69,15 +69,18 @@
 | image layer | meaning
 |--|--
 | background | below the room, events, and dialogue
+| midground | above the room, but below the events and dialogue
 | foreground | above the room and events, but below the dialogue
 | overlay | above the room, events, and dialogue
 
 | name | type | meaning
 |--|--|--
 | background | text | show named image on background layer
+| midground | text | show named image on midground layer
 | foreground | text | show named image on foreground layer
 | overlay | text | show named image on overlay layer
 | clear-background | tag | clear image on background layer
+| clear-midground | tag | clear image on midground layer
 | clear-foreground | tag | clear image on foreground layer
 | clear-overlay | tag | clear image on overlay layer
 

src/scripts/playback.js

@@ -241,6 +241,13 @@ if (backgrounds.length > 0) {
     HIDE_IMAGE("BACKGROUND");
 }
 
+let midgrounds = FIELDS_OR_LIBRARY("midground");
+if (midgrounds.length > 0) {
+    SHOW_IMAGE("MIDGROUND", midgrounds, 1, 0, 0);
+} else if (IS_TAGGED(EVENT, "clear-midground")) {
+    HIDE_IMAGE("MIDGROUND");
+}
+
 let foregrounds = FIELDS_OR_LIBRARY("foreground");
 if (foregrounds.length > 0) {
     SHOW_IMAGE("FOREGROUND", foregrounds, 2, 0, 0);