喵呜机博客

最近看到mcmod百科上有个叫成就生成器的东西，于是也想用Python做一个。

大致思路：

一张成就图像，需要有底图，图标和和说明文字三个部分。
首先因为成就的底图有透明度，所以不能上传到博客园的相册里，于是我把它放在了其他图床（SM.MS）上，地址见代码（base_url）。
成就的图标比较难搞，我使用的是Minecraft Wiki上的物品栏图标，大致思路是先把Sprite全图下载下来，然后再从Wiki的Lua脚本里获取物品名和图标位置的映射关系，然后保存在一个字典里备用。
Minecraft的英文字体（minecraft.otf）在网上是比较好找的，下载后和脚本文件放在同一目录下即可。不过，现在网上还是找不到Minecraft原生的中文字体(即像素化的仿宋字体)，所以要显示中文，就只能用系统自带的simsun.ttc将就一下了。

注意图像的绘制需要用到Pillow模块，html的处理和提取需要BeautifulSoup模块，需使用pip命令安装。

代码如下：

from urllib.request import urlopen, urlretrieve
from bs4 import BeautifulSoup
from PIL import Image, ImageFont, ImageDraw
import re, string, os, requests

size = 32
listsize = 32
page_url = r'https://minecraft.gamepedia.com/Module:InvSprite'
sprite_url = r'https://static.wikia.nocookie.net/minecraft_gamepedia/images/4/44/InvSprite.png/revision/latest'
base_url = r'https://i.loli.net/2020/09/27/zwIY6nVJRmqbHaL.png' #使用SM.MS储存成就底图
catdict = {}
itemdict = {}

def init():
    #创建资源文件夹...
    if (not os.path.exists(r'./adv-maker/')):
        os.mkdir(r'./adv-maker/')
    
    #下载图标文件...
    if (not os.path.exists(r'./adv-maker/inv-sprite.png')):
        print('Downloading Sprites file...')
        urlretrieve(sprite_url, './adv-maker/inv-sprite.png')

    #下载成就底图...
    if (not os.path.exists(r'./adv-maker/advancement-base.png')):
        print('Downloading Advancement Background Image...')
        r = requests.get(base_url)
        with open(r'./adv-maker/advancement-base.png','wb') as bim:
            bim.write(r.content)
    
    #把Wiki上的Lua脚本先搞出来...
    if (not os.path.exists(r'./adv-maker/pos-info.txt')):
        resp = urlopen(page_url)
        print('Downloading HTML file...')
        cont = resp.read()
        soup = BeautifulSoup(cont,'html.parser')
        print('Extracting Lua script...')
        src = soup.select(".mw-code")[0].prettify().replace('&amp;','&amp;')
        print('Saving the script...')
        with open(r'./adv-maker/pos-info.txt','w+') as f:
            f.write(src)

    print('Reading Lua script...')
    f = open(r'./adv-maker/pos-info.txt','r')
    src = f.read()

    f.close()
    print('Getting Position Info...')
    #...然后提取物品名称、物品分类、在图中的位置等信息，存起来
    pat1 = re.compile(r'^\s*{ name = \'(.*)\', id = (.*) }',re.M)
    pat2 = re.compile(r'^\s*(.*) = { pos = (.*), section = (.*) }',re.M)

    res1 = pat1.findall(src)
    res2 = pat2.findall(src)

    for cat in res1:
        catdict[str(cat[1])] = cat[0]

    for itm in res2:
        #print('%-45s%-35s%-20s' %(itm[0][2:-2] if(itm[0][0]=='[') else itm[0], catdict[itm[2]], itm[1])) 如果要显示物品列表，把这行的注释符号去掉
        itemdict[(itm[0][2:-2] if(itm[0][0]=='[') else itm[0])] = int(itm[1])

def trans_paste(bg,fg,box=(0,0)):
    trans = Image.new("RGBA",bg.size)
    trans.paste(fg,box,mask=fg)
    nim = Image.alpha_composite(bg,trans)
    return nim

def show(tar="???",text1="Advancement Made!",color1=(255,255,0),text2="Minecraft Advancements!",color2=(255,255,255)):
    idx = 1
    if (tar in itemdict):
        idx = itemdict[tar]
    posx = int((idx - 1) // listsize)
    posy = (idx - 1 + listsize) % listsize
    
    print(idx,posx,posy)
    sprite = srci.crop((posy*size,posx*size,(posy+1)*size,(posx+1)*size))

    box = (17, 16, 17 + size, 16 + size)
    resi = trans_paste(advi,sprite,box)
    drw = ImageDraw.Draw(resi)
    drw.text((60, 12), text1, font=fnt, fill=color1)
    drw.text((60, 34), text2, font=fnt, fill=color2)
    resi.show()

def main():
    init()
    
    global srci, advi, fnt
    srci = Image.open('./adv-maker/inv-sprite.png').convert('RGBA')
    advi = Image.open('./adv-maker/advancement-base.png').convert('RGBA')
    fnt = ImageFont.truetype(r'minecraft.otf', 20)
    #fnt = ImageFont.truetype("simsun.ttc", 19) Use this to display Chinese characters
    
    #show('Wooden Pickaxe',text2='Stone Age')
    show(text1='Advancement Made!',text2='What the hell is this?')

if __name__ == '__main__':
    main()
    # print(__name__)