add Fresca piece set by sadsnake - closes lichess-org#5497

COPYING.md

@@ -55,6 +55,7 @@ public/piece/shapes | [flugsio](https://github.com/flugsio/chess_shapes) | [CC B
 public/piece/pixel | [therealqtpi](https://twitter.com/therealqtpi) | AGPLv3+
 public/piece/california | [Jerry S.](https://sites.google.com/view/jerrychess/home) | [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/)
 public/piece/maestro | [sadsnake1](https://github.com/sadsnake1) | [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/)
+public/piece/fresca | [sadsnake1](https://github.com/sadsnake1) | [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/)
 public/sounds/futuristic | [Enigmahack](https://github.com/Enigmahack) | AGPLv3+
 public/sounds/nes | [Enigmahack](https://github.com/Enigmahack) | AGPLv3+
 public/sounds/piano | [Enigmahack](https://github.com/Enigmahack) | AGPLv3+

bin/gen/piece-sprite

@@ -26,7 +26,8 @@ themes = [
   ['kosal', 'svg'],
   ['pixel', 'svg'],
   ['california', 'svg'],
-  ['maestro', 'svg']
+  ['maestro', 'svg'],
+  ['fresca', 'svg']
 ]
 types = {
   'svg' => 'svg+xml;base64,',

modules/pref/src/main/PieceSet.scala

@@ -30,7 +30,8 @@ object PieceSet extends PieceSetObject {
     "reillycraig", "companion", "riohacha",
     "kosal", "leipzig", "fantasy",
     "spatial", "california", "maestro",
-    "pixel", "shapes", "letter"
+    "pixel", "fresca", "shapes",
+    "letter"
   ) map { name => new PieceSet(name) }
 }
 

public/piece-css/fresca.external.css

@@ -0,0 +1,12 @@
+.is2d .pawn.white {background-image:url('/assets/piece/fresca/wP.svg')}
+.is2d .knight.white {background-image:url('/assets/piece/fresca/wN.svg')}
+.is2d .bishop.white {background-image:url('/assets/piece/fresca/wB.svg')}
+.is2d .rook.white {background-image:url('/assets/piece/fresca/wR.svg')}
+.is2d .queen.white {background-image:url('/assets/piece/fresca/wQ.svg')}
+.is2d .king.white {background-image:url('/assets/piece/fresca/wK.svg')}
+.is2d .pawn.black {background-image:url('/assets/piece/fresca/bP.svg')}
+.is2d .knight.black {background-image:url('/assets/piece/fresca/bN.svg')}
+.is2d .bishop.black {background-image:url('/assets/piece/fresca/bB.svg')}
+.is2d .rook.black {background-image:url('/assets/piece/fresca/bR.svg')}
+.is2d .queen.black {background-image:url('/assets/piece/fresca/bQ.svg')}
+.is2d .king.black {background-image:url('/assets/piece/fresca/bK.svg')}