#!/usr/bin/env python
# -*- coding: utf-8 -*-
# -*- mode: python;Encoding: utf8n -*-
# Last updated: <2015/01/01 14:59:37 +0900>

'''
1ドットずつ加工した画像を生成するPythonスクリプト

usage: conv_img.py INPUT_IMAGE OUTPUT_IMAGE
'''

import sys
from PIL import Image

SCALEX, SCALEY = 8, 8

def get_color(c, v):
    ''' 色を与えられた係数で明るくしたり暗くしたり '''
    
    r, g, b = c
    return (int(r * v), int(g * v), int(b * v))

def write_img(im, sx, sy, cc):
    ''' 1ドット分の色を数倍にして描き込む '''
    
    nx = sx * SCALEX
    ny = sy * SCALEY
    r, g, b = cc
    
    for y in range(SCALEY):
        for x in range(SCALEX):
            im.putpixel((nx + x, ny + y), (r, g, b))
            
    for x in range(SCALEX):
        x0 = nx + x
        y0 = ny
        im.putpixel((x0, y0), get_color(im.getpixel((x0, y0)), 1.3))
        # y0 = ny + 1
        # im.putpixel((x0, y0), get_color(im.getpixel((x0, y0)), 1.2))
        # y0 = ny + SCALEY - 2
        # im.putpixel((x0, y0), get_color(im.getpixel((x0, y0)), 0.7))
        y0 = ny + SCALEY - 1
        im.putpixel((x0, y0), get_color(im.getpixel((x0, y0)), 0.7))
        
    for y in range(SCALEY):
        x0 = nx
        y0 = ny + y
        im.putpixel((x0, y0), get_color(im.getpixel((x0, y0)), 1.2))
        # x0 = nx + 1
        # im.putpixel((x0, y0), get_color(im.getpixel((x0, y0)), 1.1))
        # x0 = nx + SCALEX - 2
        # im.putpixel((x0, y0), get_color(im.getpixel((x0, y0)), 0.8))
        x0 = nx + SCALEX - 1
        im.putpixel((x0, y0), get_color(im.getpixel((x0, y0)), 0.8))
        
def conv_img(infile, outfile):
    im = Image.open(infile, 'r')
    srcim = im.convert("RGB")
    w, h = im.size
    nim = Image.new("RGB", (w * SCALEX, h * SCALEY))
    for y in range(h):
        for x in range(w):
            write_img(nim, x, y, srcim.getpixel((x, y)))
    nim.save(outfile, 'PNG')
    nim.show()
    
def main():
    argvs = sys.argv
    if len(argvs) != 3:
        print "usage: python conv_img.py INPUT_IMAGE OUTPUT_IMAGE"
        sys.exit()
    
    infile = argvs[1]
    outfile = argvs[2]
    conv_img(infile, outfile)

if __name__ == '__main__':
    main()