create_theme_preview.py

import os

from os import listdir
from os.path import isdir

import cairo

from pychess.Utils.const import *
from pychess.Utils.Piece import Piece
from pychess.gfx import Pieces
from pychess.System.prefix import addDataPrefix


SQUARE = 39

PIECES = (
    (Piece(WHITE, KING), Piece(WHITE, QUEEN), Piece(WHITE, ROOK), None),
    (Piece(WHITE, KNIGHT), Piece(WHITE, BISHOP), None, Piece(BLACK, PAWN)),
    (Piece(WHITE, PAWN), None, Piece(BLACK, BISHOP), Piece(BLACK, KNIGHT)),
    (None, Piece(BLACK, ROOK), Piece(BLACK, QUEEN), Piece(BLACK, KING)),
)

themes = []

pieces = addDataPrefix("pieces")
themes += [d.capitalize() for d in listdir(pieces) if isdir(os.path.join(pieces, d))]
themes.sort()

for theme in themes:
    pngfile = f"{pieces}/{theme}.png"
    print("Creating %s" % pngfile)

    Pieces.set_piece_theme(theme)

    surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, SQUARE * 4, SQUARE * 4)

    context = cairo.Context(surface)
    context.set_source_rgb(0.5, 0.5, 0.5)

    for x in range(4):
        for y in range(4):
            if (x + y) % 2 == 1:
                context.rectangle(x * SQUARE, y * SQUARE, SQUARE, SQUARE)
    context.fill()

    context.rectangle(0, 0, 4 * SQUARE, 4 * SQUARE)
    context.stroke()

    context.set_source_rgb(0, 0, 0)
    for y, row in enumerate(PIECES):
        for x, piece in enumerate(row):
            if piece is not None:
                Pieces.drawPiece(piece, context, x * SQUARE, (3 - y) * SQUARE, SQUARE)

    surface.write_to_png(pngfile)