python image

    def get_deck_image(self, deck, deck_name=None, deck_author=None):
        """Construct the deck with Pillow and return image."""
        card_w = 302
        card_h = 363
        card_x = 30
        card_y = 30
        font_size = 50
        txt_y_line1 = 430
        txt_y_line2 = 500
        txt_x_name = 50
        txt_x_cards = 503
        txt_x_elixir = 1872

        bg_image = Image.open("data/deck/img/deck-bg-b.png")
        size = bg_image.size

        font_file_regular = "data/deck/fonts/OpenSans-Regular.ttf"
        font_file_bold = "data/deck/fonts/OpenSans-Bold.ttf"

        image = Image.new("RGBA", size)
        image.paste(bg_image)

        if not deck_name:
            deck_name = "Deck"

        # cards
        for i, card in enumerate(deck):
            card_image_file = "data/deck/img/cards/{}.png".format(card)
            card_image = Image.open(card_image_file)
            # size = (card_w, card_h)
            # card_image.thumbnail(size)
            box = (card_x + card_w * i,
                   card_y,
                   card_x + card_w * (i + 1),
                   card_h + card_y)
            image.paste(card_image, box, card_image)

        # elixir
        total_elixir = 0
        # total card exclude mirror (0-elixir cards)
        card_count = 0
        for card_key, card_value in self.crdata["Cards"].items():
            if card_key in deck:
                total_elixir += card_value["elixir"]
                if card_value["elixir"]:
                    card_count += 1
        average_elixir = "{:.3f}".format(total_elixir / card_count)

        # text
        # Take out hyphnens and capitlize the name of each card
        card_names = [string.capwords(c.replace('-', ' ')) for c in deck]

        txt = Image.new("RGBA", size)
        txt_name = Image.new("RGBA", (txt_x_cards - 30, size[1]))
        font_regular = ImageFont.truetype(font_file_regular, size=font_size)
        font_bold = ImageFont.truetype(font_file_bold, size=font_size)

        d = ImageDraw.Draw(txt)
        d_name = ImageDraw.Draw(txt_name)

        line1 = ', '.join(card_names[:4])
        line2 = ', '.join(card_names[4:])
        # card_text = '\n'.join([line0, line1])

        deck_author_name = deck_author.name if deck_author else ""

        d_name.text(
            (txt_x_name, txt_y_line1), deck_name, font=font_bold,
            fill=(0xff, 0xff, 0xff, 255))
        d_name.text(
            (txt_x_name, txt_y_line2), deck_author_name, font=font_regular,
            fill=(0xff, 0xff, 0xff, 255))
        d.text(
            (txt_x_cards, txt_y_line1), line1, font=font_regular,
            fill=(0xff, 0xff, 0xff, 255))
        d.text(
            (txt_x_cards, txt_y_line2), line2, font=font_regular,
            fill=(0xff, 0xff, 0xff, 255))
        d.text(
            (txt_x_elixir, txt_y_line1), "Avg elixir", font=font_bold,
            fill=(0xff, 0xff, 0xff, 200))
        d.text(
            (txt_x_elixir, txt_y_line2), average_elixir, font=font_bold,
            fill=(0xff, 0xff, 0xff, 255))

        image.paste(txt, (0, 0), txt)
        image.paste(txt_name, (0, 0), txt_name)

        # scale down and return
        scale = 0.5
        scaled_size = tuple([x * scale for x in image.size])
        image.thumbnail(scaled_size)

        return image