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#! /usr/bin/env python
"""
KansasFest 2015
HackFest Entry: Disk Images Images
By Charles Mangin
@RetroConnector
requires ImageMagick: http://www.imagemagick.org/
and python PNG module: https://pypi.python.org/pypi/pypng
"""
import os,sys # filesystem functions
import subprocess
try:
import png # PNG image library
except:
print("\n\n" + sys.argv[0] + " requires the Python PNG module\n\n Download from https://pypi.python.org/pypi/pypng \n Or type in shell: pip install pypng\n\n")
sys.exit(1) # exit on exception - no library installed
try:
INPUTFILE = sys.argv[1] # what DSK file to parse
DSK = open(INPUTFILE, "rb") # open the DSK file for reading
except:
print("\n\nUsage: python "+ sys.argv[0] +" [filename]\n\n [filename] should be a .DSK file of 143kb.\n")
sys.exit(1) # exit on exception - no file chosen
print("Checking " + INPUTFILE + "...\n")
# to do: check for 140k 5.25'' disks vs 400k/800k 3.5'' and adjust accordingly
if (os.path.getsize(INPUTFILE)) != 143360: # check file size. for 5.25'', it needs to be 143k
print("\n\nOops. Is " + INPUTFILE + " a DSK file of 143kb?\n\n")
sys.exit(1) # exit on exception - file is empty, etc
# The point: Make a PNG image from the data on a floppy disk image.
# 5.15'' disks have 35 tracks, each with 16 sectors of 256 bytes each, for a total of 143,360 bytes
# so 35 lines of 4096 px.
TRACKS = 35
SECTORS = 16
BYTESPERSECTOR = 256
TEMPFILENAME = "DiskImageTEMP.png"
PNG = open("DiskImageTEMP.png", "wb") # open a PNG for writing
# new, empty arrays
BYTES = []
PIXELS = []
try:
byte = DSK.read(1) # read a byte
<<<<<<< HEAD
while byte != "": # while the file still has bytes in it
byte = DSK.read(1)
if len(byte) > 0: # the last byte, for whatever reason, is length 0. Bah.
BYTES.append(ord(byte)) # append the number representing the byte (0-255) to the BYTES array
=======
while byte !="": # while the file still has bytes in it
BYTES.append(ord(byte)) # append the number representing the byte (0-255) to the BYTES array
byte = DSK.read(1)
>>>>>>> master
except:
print("\n\nOops. Is " + INPUTFILE + " a DSK file of 143kb?\n\n")
sys.exit(1) # exit on exception - file is empty, etc
print("\n Starting.\n")
<<<<<<< HEAD
for TRACK in range(0,TRACKS,1): # for each of the 35 tracks
LINE=[] # start a new line of pixels
for SECTOR in range(0,SECTORS*BYTESPERSECTOR,1): # write the bytes for the sectors in that track to the line array
offset = (SECTOR * TRACK) + SECTOR
LINE.append(BYTES[(SECTOR * TRACK) + SECTOR])
=======
for TRACK in range(TRACKS): # for each of the 35 tracks
LINE=[] # start a new line of pixels
for SECTOR in range(SECTORS*BYTESPERSECTOR): # write the bytes for the sectors in that track to the line array
LINE.append(BYTES[(SECTORS*BYTESPERSECTOR * TRACK) + SECTOR])
>>>>>>> master
print(" Track: " + str(TRACK))
PIXELS.append(LINE) # add the array of pixels to the array of arrays
print("\n Done.\n")
# write to the PNG file
w = png.Writer(SECTORS*BYTESPERSECTOR,TRACKS, greyscale=True, bitdepth=8)
w.write(PNG, PIXELS) # each number in the array becomes a pixel in the image. each array becomes a line.
sys.stdout.write("\n\n\r Writing bytes to disk. Chunka-chunka-chunk. Whirr.\n\n")
sys.stdout.flush()
DSK.close() # done with these files. close them.
PNG.close()
OUTPUTFILE = os.path.join(INPUTFILE + ".png")
# set a destination file same as DSK, but with PNG extension
try:
subprocess.call(['convert', 'DiskImageTEMP.png', '-scale', '100%x300%', '-resize', '3072x!', '(', '-size', '3072x115', 'pattern:horizontal3', '-negate', '-alpha', 'copy', '-fx', '#000', ')', '-composite', '-virtual-pixel', 'HorizontalTile', '-flip', '+distort', 'Polar', '1024 220', '-resize', '50%x50%', OUTPUTFILE])
# convert the 4096x35px image to a square, rotate, then rotate around an axis.
except OSError:
print("\n\nOops. This script requires ImageMagick: http://www.imagemagick.org/")
sys.exit(1) # exit on exception - needs imagemagick installed
if 'win32' in sys.platform:
# Because the Windows "start" commandline command cannot take an enquoted file or pathname,
# which is necessary if the path has spaces, we have to obtain the "short" version of
# the file/path in the 8.3 format. There is no Python library to do this for us.
# Said another way: Windows is broken in that enquoting a file argument after their start
# command causes it to open a blank terminal. Boo!
# But we do this *after* the ImageMagick convert process above, because that will take an
# enquoted file just fine.
from ctypes import windll, create_unicode_buffer, sizeof
buf = create_unicode_buffer( 512 )
if windll.kernel32.GetShortPathNameW( unicode(OUTPUTFILE), buf, sizeof(buf) ):
OUTPUTFILE = buf.value
else:
# Otherwise we enquote the output file becuase it may have spaces
OUTPUTFILE = '"' + OUTPUTFILE + '"'
platform_commands = {
'darwin' : 'open', # opens the resulting image in the default Mac image viewer (Preview.app)
'linux' : 'xdg-open', # opens the resulting image in the default Linux image viewer (mime-determined); Python 2: 'linux2', Python 3: 'linux'
'win32' : 'start' # opens the resulting image in the default Windows image viewer (Windows Photo Viewer, or...?)
}
# Open the .PNG in the default image viewer
for platform,command in platform_commands.items():
if platform in sys.platform:
os.system(command + ' ' + OUTPUTFILE)
break
else:
print(" Your file is ready to view: " + OUTPUTFILE)