Colored floor tile

core/src/mindustry/world/Tile.java

@@ -311,6 +311,10 @@ public class Tile implements Position, QuadTreeObject, Displayable{
         if(!world.isGenerating() && prev != type){
             Events.fire(floorChange.set(this, prev, type));
         }
+
+        if(this.floor != prev){
+            this.floor.floorChanged(this);
+        }
     }
 
     public boolean isEditorTile(){
@@ -564,6 +568,10 @@ public class Tile implements Position, QuadTreeObject, Displayable{
             null : null;
     }
 
+    public boolean shouldSaveData(){
+        return floor.saveData || overlay.saveData || block.saveData;
+    }
+
     public int staticDarkness(){
         return block.solid && block.fillsTile && !block.synthetic() ? data : 0;
     }

core/src/mindustry/world/blocks/environment/ColoredFloor.java

@@ -0,0 +1,47 @@
+package mindustry.world.blocks.environment;
+
+import arc.graphics.*;
+import arc.graphics.g2d.*;
+import mindustry.world.*;
+
+public class ColoredFloor extends Floor{
+    public Color defaultColor = Color.white;
+    protected int defaultColorRgba;
+
+    public ColoredFloor(String name){
+        super(name);
+        saveData = true;
+    }
+
+    @Override
+    public void init(){
+        super.init();
+        defaultColorRgba = defaultColor.rgba();
+    }
+
+    @Override
+    public void drawBase(Tile tile){
+        //make sure to mask out the alpha channel - it's generally undesirable, and leads to invisible blocks when the data is not initialized
+        Draw.color(tile.extraData | 0xff);
+        super.drawBase(tile);
+        Draw.color();
+    }
+
+    @Override
+    public void drawOverlay(Tile tile){
+        //make sure color doesn't carry over
+        Draw.color();
+        super.drawOverlay(tile);
+    }
+
+    @Override
+    public void floorChanged(Tile tile){
+        //reset to white
+        tile.extraData = defaultColorRgba;
+    }
+
+    @Override
+    public int minimapColor(Tile tile){
+        return tile.extraData | 0xff;
+    }
+}

core/src/mindustry/world/blocks/environment/Floor.java

@@ -268,6 +268,9 @@ public class Floor extends Block{
         return new TextureRegion[]{Core.atlas.find(Core.atlas.has(name) ? name : name + "1")};
     }
 
+    /** Called when this floor is set on the specified tile. */
+    public void floorChanged(Tile tile){}
+
     /** @return whether to index this floor by flag */
     public boolean shouldIndex(Tile tile){
         return true;