#! /usr/bin/env python
#
# Human.py is a Captcha type generator for Linux / Win32 systems with PIL
# Version 1.0.1 - 30 March 2010 - T800
 
import sys 
import Image
import ImageFile
import random
import ImageFilter
import ImageChops
import ImageFont
import ImageDraw
 
# User definable variables
#
random_fonts = True             # True or False
random_rotate = True            # True or False
random_fonts_colour = True      # True or False
sizer = 48                      # Set font size
text = 'Google'                 # Test test to created in a  CAPTCHA style
 
 
def chr_bitmap( txts, sze, typn, ang):
    textlen = len(text)
    if random_fonts == True:    # Selects a randon font to use
        typn = random.randint(0, len(fonts)-1)
    else:
        typn = 0
    if random_rotate == True:   # Choose a random slant on chr
        ang = random.choice([-25, 0, 25, 45, 0])
    else:
        ang = 0
 
    # Please note that the colours will be inverted as the merge is image.subtract
    #    
    if random_fonts_colour == True:       
        fcol = random.choice( ['#ff0000', '#00ff00', '#0000ff', '#00ffff', '#ff00ff', '#ffff00', '#7f7f7f'])
    else:
        fcol = '#ffffff'
    font = ImageFont.truetype( fonts[typn], sze )
 
    # Returns the width and height of the given text, as a 2-tuple.
    #
    sizer = font.getsize(txts)                          
 
    im = Image.new('RGBA', sizer, (0, 0, 0, 0))         # Create a blank image with the given size
    draw = ImageDraw.Draw(im)
    draw.text((0, 0), txts, font=font, fill = fcol )    #Draw text
    im = im.rotate(ang, expand=True)
    return im, im.size
 
def make_phrase():
    maxy = 0                                            # Default x, y to assemble chr on canvas
    maxx = 0
    textlen = len(text)
    img = []
    for txt in range(textlen):
        typen = 0
        angle = 0
        im, (dimx, dimy) = chr_bitmap( text[txt], sizer, typen, angle)
        img.append(im)
        if dimy > maxy:
            maxy=dimy
        maxx = maxx + dimx
 
    spacer = 0
    imgf = Image.open("zat.jpg").convert("RGBA")    # Background image
    sz2 = ( maxx, maxy+2*spacer)
    imgc = imgf.resize( sz2 )
    posx = 0
    posy = 0
 
    for tile in range(len(text)):
        (tx, ty) = img[tile].size                   # get dimentions of chr
        rect = (0, 0, tx, ty)                       # calc rectangle to cut
        clip = img[tile].crop(rect)                 # Cut chr
        sz = ( posx, posy, posx + tx, posy + ty)    # calc canvas paste
        imc = imgc.crop(sz)                         # cut chr sized lump out of canvas
        imd = ImageChops.subtract( imc, clip )      # Merge clip and chr by subtraction
        imgc.paste(imd, sz)                         # Paste it
        posx = posx + tx +1
    return imgc
 
if __name__=='__main__':
 
    br, bg, bb =  255, 255, 255                     # Canvas colour
 
    fonts = ['fonts/1942.ttf', 'fonts/01 DigiGraphics.ttf', 'fonts/AARDC___.TTF', 
             'fonts/abaddon.TTF', 'fonts/Acens.ttf', 'fonts/advent_bold.ttf', 'fonts/BOGSTAND.TTF' ]
 
    imgc = make_phrase()                            # Main Call
 
    imgc.save("human.jpg", "JPEG")