NES nametable mirroring diagrams generator

import PIL.Image
import PIL.ImageDraw

tex_a = "  ****  " \
        " **  ** " \
        "**    **" \
        "**    **" \
        "********" \
        "**    **" \
        "**    **" \
        "**    **"
tex_b = "******* " \
        "**    **" \
        "**    **" \
        "******* " \
        "**    **" \
        "**    **" \
        "**    **" \
        "******* "
tex_c = " ****** " \
        "**    **" \
        "**    **" \
        "**      " \
        "**      " \
        "**    **" \
        "**    **" \
        " ****** "
tex_d = "******* " \
        "**    **" \
        "**    **" \
        "**    **" \
        "**    **" \
        "**    **" \
        "**    **" \
        "******* "
tex_2 = "        " \
        "  ***** " \
        " **   **" \
        "     ** " \
        "   ***  " \
        "  **    " \
        " **     " \
        " *******"
tex_4 = "        " \
        "    *** " \
        "   **** " \
        "  ** ** " \
        " **  ** " \
        " *******" \
        "     ** " \
        "     ** "
tex_0 = "        " \
        "   ***  " \
        "  *  ** " \
        " **   **" \
        " **   **" \
        " **   **" \
        "  **  * " \
        "   ***  "
tex_Cn= "        " \
        "   **** " \
        "  **  **" \
        " **     " \
        " **     " \
        " **     " \
        "  **  **" \
        "   **** "
tex_8 = "        " \
        "  ***** " \
        " **   **" \
        " **   **" \
        "  ***** " \
        " **   **" \
        " **   **" \
        "  ***** "
tex = { "a":tex_a, "b":tex_b, "c":tex_c, "d":tex_d, "0":tex_0, "2":tex_2, "4":tex_4, "8":tex_8, "C":tex_Cn }

col_a = (  0,  0,160)
col_b = (160,  0,  0)
col_c = (  0,120,  0)
col_d = (120,120,  0)
col = { "a":col_a, "b":col_b, "c":col_c, "d":col_d }

fade = [ 130, 160, 180 ]
fade_mirror = 160

def fade_color(c,f):
    (r,g,b) = c
    r = f + int(((255-f)*r)/255)
    g = f + int(((255-f)*g)/255)
    b = f + int(((255-f)*b)/255)
    return (r,g,b)

def draw_tex(img,s,col,scale,x,y):
    pixels = img.load()
    while len(s) > 0:
        t = tex[s[0]]
        s = s[1:]
        for ty in range(0,8):
            py = y + (scale * ty)
            for tx in range(0,8):
                px = x + (scale * tx)
                if t[0] != ' ':
                    for spy in range(0,scale):
                        for spx in range(0,scale):
                            pixels[px+spx,py+spy] = col
                t = t[1:]
        x += (scale * 8)


def draw_table(img,s,x,y,addr,mirr):
    pixels = img.load()
    for ty in range(0,(30*4)+1):
        for tx in range(0,(32*4)+1):
            cb = col[s]
            if (tx % (32*4) == 0) or (ty % (30*4) == 0):
                cb = (0,0,0)
            elif (tx % 8 == 0) or (ty % 8 == 0):
                cb = fade_color(cb,fade[0])
            elif (tx % 4 == 0) or (ty % 4 == 0):
                cb = fade_color(cb,fade[2])
            else:
                cb = fade_color(cb,fade[1])
            if mirr and cb != (0,0,0):
                cb = fade_color(cb,fade_mirror)
            pixels[tx+x,ty+y] = cb
    draw_tex(img,addr,(0,0,0),1,x+8,y+8)
    draw_tex(img,s,(255,255,255),8,x+33,y+29)

dimx = (32 * 4 * 2)+1
dimy = (30 * 4 * 2)+1

def mirroring_img(seq):
    subx = (32 * 4)
    suby = (30 * 4)
    img = PIL.Image.new("RGB",(dimx,dimy))
    draw_table(img,seq[0],   0,   0,"2000",False)
    draw_table(img,seq[1],subx,   0,"2400",seq[1] in seq[0:1])
    draw_table(img,seq[2],   0,suby,"2800",seq[2] in seq[0:2])
    draw_table(img,seq[3],subx,suby,"2C00",seq[3] in seq[0:3])
    img.save("mirroring_"+seq+".png")

mirroring_img("aabb")
mirroring_img("abab")
mirroring_img("aaaa")
mirroring_img("bbbb")
mirroring_img("abcd")
mirroring_img("abba")
mirroring_img("abbb")
mirroring_img("acbc")
mirroring_img("abcc")
mirroring_img("abbc")

img0 = PIL.Image.open("mirroring_aaaa.png")
img1 = PIL.Image.open("mirroring_bbbb.png")
img = PIL.Image.new("RGB",(dimx,(dimy*2)+8),(255,255,255))
img.paste(img0,(0,0))
img.paste(img1,(0,dimy+8))
img.save("mirroring_aaaa_bbbb.png")