Add tabletop components 486-500 and ten game icons

Fifteen pieces of a games night: Dice, DiceTray, PlayingCard, CardHand,
Deck, Chessboard, GoBoard, MahjongTile, Domino, Roulette, CoinFlip,
BingoCard, TicTacToe, ScoreTrack and Meeple. Component number 500 is
a meeple, which seems right.

Dice tumble, coins turn and wheels spin on a cue, a frame at a time,
and land at once under Reduce Motion. Hands lift the card you point
at and play the one drawn on top; pieces and stones pick the lighter
of Lit and Ink for White, so they read in every palette; the computer
plays a fair O; FREE is a star in every language.

New 12x12 icons: Spade, Club, Diamond, Meeple, King, Queen, Rook,
Bishop, Knight and Pawn.

tabletop/round2_test.go

@@ -0,0 +1,49 @@
+package tabletop_test
+
+import (
+	"bytes"
+	"strings"
+	"testing"
+
+	"github.com/egoist/mygo/ui"
+
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/data"
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/tabletop"
+)
+
+func TestChessHoldsAreLoggedAndReported(t *testing.T) {
+	var board [64]tabletop.Piece
+	board[0] = tabletop.Piece{Kind: tabletop.Rook}
+	held := []int{}
+	log := logged(func() {
+		tt := view(600, 400, newWorld(), func(c *ui.Context) {
+			if r := tabletop.Chessboard(c, "B", &board, tabletop.ChessboardOptions{}); r.Changed {
+				held = append(held, r.Held)
+			}
+		})
+		cell(t, tt, "CHESSBOARD", 8, 16, 0)
+		cell(t, tt, "CHESSBOARD", 8, 16, 0)
+		// A move is a move, not a hold put down.
+		cell(t, tt, "CHESSBOARD", 8, 16, 0)
+		cell(t, tt, "CHESSBOARD", 8, 16, 8)
+	})
+	if len(held) != 3 || held[0] != 0 || held[1] != -1 || held[2] != 0 || strings.Count(log, "chess hold") != 3 {
+		t.Fatalf("holds %v; log:\n%s", held, log)
+	}
+}
+
+func TestMeepleSlotIsTheItemSlot(t *testing.T) {
+	got := view(200, 200, newWorld(), func(c *ui.Context) {
+		tabletop.Meeple(c, "M", tabletop.MeepleOptions{Empty: true})
+	}).Image().Pix
+	want := view(200, 200, newWorld(), func(c *ui.Context) {
+		k := pixel.K(c)
+		ui.Box(c).Size(k.D(data.SlotSize), k.D(data.SlotSize)).Draw(func(p *ui.Painter, r ui.Rect) {
+			data.DrawSlot(k.Canvas(p, r), 0, 0, data.Item{}, data.ItemSlotOptions{})
+		})
+	}).Image().Pix
+	if !bytes.Equal(got, want) {
+		t.Fatal("an empty meeple slot is not data's item slot")
+	}
+}