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added subprocess calls

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more error checking, changed sys to subprocess
This commit is contained in:
Charles Mangin 2015-08-13 12:57:46 -04:00
parent c0f6bbea83
commit 5bebbcfbc6
1 changed files with 36 additions and 12 deletions
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42
DSK Image/DSK-Image.py
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@ -8,7 +8,15 @@
import os,sys # filesystem functions import os,sys # filesystem functions
import subprocess
try:
import png # PNG image library import png # PNG image library
except:
print("This script requires the python PNG module: https://pypi.python.org/pypi/pypng (or: pip install pypng)\n\n")
sys.exit(0)
try: try:
INPUTFILE = sys.argv[1] # what DSK file to parse INPUTFILE = sys.argv[1] # what DSK file to parse
@ -17,12 +25,23 @@ except:
print("\n\nUsage: python [filename]\n\n [filename] should be a DSK file of 143kb.\n\n") print("\n\nUsage: python [filename]\n\n [filename] should be a DSK file of 143kb.\n\n")
sys.exit(0) # exit on exception - no file chosen sys.exit(0) # exit on exception - no file chosen
finally: finally:
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(0) # 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
PNG = open("DiskImageTEMP.png", "wb") # open a PNG for writing PNG = open("DiskImageTEMP.png", "wb") # open a PNG for writing
# The point: Make a PNG image from the data on a floppy disk image.
# 35 tracks, each with 16 sectors of 256 bytes each, for a total of 143,360 bytes
# so 35 lines of 4096 px.
# new, empty arrays # new, empty arrays
BYTES = [] BYTES = []
@ -43,9 +62,9 @@ finally:
sys.stdout.write("\r Starting.\n\n") sys.stdout.write("\r Starting.\n\n")
for TRACK in range(0,35,1): # for each of the 35 tracks for TRACK in range(0,TRACKS,1): # for each of the 35 tracks
LINE=[] # start a new line of pixels LINE=[] # start a new line of pixels
for SECTOR in range(0,4096,1): # write the bytes for the sectors in that track to the line array 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 offset = (SECTOR * TRACK) + SECTOR
LINE.append(BYTES[(SECTOR * TRACK) + SECTOR]) LINE.append(BYTES[(SECTOR * TRACK) + SECTOR])
@ -57,10 +76,10 @@ finally:
sys.stdout.flush() sys.stdout.flush()
# write to the PNG file # write to the PNG file
w = png.Writer(4096,35, greyscale=True, bitdepth=8) 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. 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 to disk. Chunka-chunk-cka. Whirr.\n\n") sys.stdout.write("\n\n\r Writing bytes to disk. Chunka-chunka-chunk. Whirr.\n\n")
sys.stdout.flush() sys.stdout.flush()
@ -71,8 +90,13 @@ PNG.close()
OUTPUTFILE = os.path.join(INPUTFILE + ".png") OUTPUTFILE = os.path.join(INPUTFILE + ".png")
# set a destination file same as DSK, but with PNG extension # set a destination file same as DSK, but with PNG extension
os.system('convert DiskImageTEMP.png -matte -virtual-pixel transparent -resize 1024x1024! -rotate 90 -distort Polar \'512 110 512,512 -180,180\' ' + OUTPUTFILE)
try:
subprocess.call(['convert', 'DiskImageTEMP.png', '-matte', '-virtual-pixel', 'transparent', '-resize', '1024x1024!', '-rotate', '90', '-distort', 'Polar', '512 110 512,512 -180,180', OUTPUTFILE])
# convert the 4096x35px image to a square, rotate, then rotate around an axis. # 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(0) # exit on exception - needs imagemagick installed
os.system('open ' + OUTPUTFILE) # opens the resulting image in the default image viewer (Preview.app) subprocess.call(['open', OUTPUTFILE]) # opens the resulting image in the default image viewer (Preview.app)