[client] add linux taskbar icon

src/client/haxe/ru/m/tankz/Client.hx

@@ -32,6 +32,9 @@ class Client {
         L.d(TAG, 'Debug: ${Const.DEBUG}');
         L.i(TAG, 'Version: ${Const.VERSION}');
         L.i(TAG, 'Build: ${Const.BUILD}');
+        #if linux
+        LinuxIcon.apply();
+        #end
         Style.register();
         var view:ClientView = new ClientView();
         Root.bind(view);

src/client/haxe/ru/m/tankz/LinuxIcon.hx

@@ -0,0 +1,27 @@
+package ru.m.tankz;
+
+import flash.display.BitmapData;
+import flash.filters.ColorMatrixFilter;
+import flash.geom.Point;
+import flash.Lib;
+import openfl.Assets;
+
+class LinuxIcon {
+
+    private static function prepareIcon(bitmap:BitmapData):BitmapData {
+        var matrix:Array<Float> = [];
+        matrix = matrix.concat([0, 0, 1, 0, 0]);
+        matrix = matrix.concat([0, 1, 0, 0, 0]);
+        matrix = matrix.concat([1, 0, 0, 0, 0]);
+        matrix = matrix.concat([0, 0, 0, 1, 0]);
+        var cmf:ColorMatrixFilter = new ColorMatrixFilter(matrix);
+        var bitmap:BitmapData = bitmap.clone();
+        bitmap.applyFilter(bitmap, bitmap.rect, new Point(0, 0), cmf);
+        return bitmap;
+    }
+
+    public static function apply() {
+        var icon = Assets.getBitmapData("resources/icon.png");
+        Lib.current.stage.window.setIcon(prepareIcon(icon).image);
+    }
+}