amr/mspconvert
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Wrapped entire code block in try to catch exceptions

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Added a few different exceptions that are likely to happen
when trying to use this tool. It then offers useful feedback
and quits.
This commit is contained in:
A.M. Rowsell 2021-03-30 08:25:07 -04:00
commit 487f6ffb46
Signed by: amr
GPG key ID: 0B6E2D8375CF79A9
1 changed files with 72 additions and 62 deletions
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134
mspconvert.py
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@ -23,72 +23,82 @@ static unsigned char {0}_bits [] =
outputData = b'' outputData = b''
with open(filename + ".MSP", 'rb') as f: try:
versionString = f.read(4) with open(filename + ".MSP", 'rb') as f:
if versionString == b'\x4c\x69\x6e\x53': versionString = f.read(4)
version = 2 if versionString == b'\x4c\x69\x6e\x53':
elif versionString == b'\x44\x61\x6e\x4d': version = 2
version = 1 elif versionString == b'\x44\x61\x6e\x4d':
else: version = 1
print("The given file {0}.MSP is not a valid Microsoft Paint file!".format(filename)) else:
sys.exit(255) print("The given file {0}.MSP is not a valid Microsoft Paint file!".format(filename))
sys.exit(255)
if version == 2: if version == 2:
print("Version 2 Paint file detected...") print("Version 2 Paint file detected...")
width = int.from_bytes(f.read(2), "little") width = int.from_bytes(f.read(2), "little")
height = int.from_bytes(f.read(2), "little") height = int.from_bytes(f.read(2), "little")
size = int((width * height) / 8) size = int((width * height) / 8)
f.seek((height * 2) + 32) # seek to the start of image data f.seek((height * 2) + 32) # seek to the start of image data
while(byte := f.read(1)): while(byte := f.read(1)):
if(int.from_bytes(byte, "little") == 0): # RLL-encoded if(int.from_bytes(byte, "little") == 0): # RLL-encoded
rllLen = int.from_bytes(f.read(1), "little") rllLen = int.from_bytes(f.read(1), "little")
rllValue = f.read(1) rllValue = f.read(1)
for i in range(0,rllLen): for i in range(0,rllLen):
outputData += rllValue outputData += rllValue
size -= 1 size -= 1
else: else:
rllLen = int.from_bytes(byte, "little") rllLen = int.from_bytes(byte, "little")
for i in range(0,rllLen): for i in range(0,rllLen):
outputData += f.read(1) outputData += f.read(1)
size -= 1 size -= 1
print("Remaining size: {0}".format(size)) print("Remaining size: {0}".format(size))
for i in range(0, size): for i in range(0, size):
outputData += b'\xff' outputData += b'\xff'
with open(filename + "_converted.xbm", 'w') as f: with open(filename + "_converted.xbm", 'w') as f:
print("Writing output file...") print("Writing output file...")
f.write(outputString.format(filename, width, height)) f.write(outputString.format(filename, width, height))
f.write(" {") f.write(" {")
q = 0
for byte in outputData:
result = int('{:08b}'.format(byte)[::-1], 2)
f.write("0x" + '{:x}'.format(result) + ", ")
q += 1
if q >= 16:
f.write("\n")
q = 0
f.write(" };")
print("Done!")
sys.exit(0)
elif version == 1:
print("Version 1 Paint detected...")
width = int.from_bytes(f.read(2), "little")
height = int.from_bytes(f.read(2), "little")
f.seek(28)
q = 0 q = 0
for byte in outputData: outputString = outputString.format(filename, width, height)
result = int('{:08b}'.format(byte)[::-1], 2) outputString += " {\n"
f.write("0x" + '{:x}'.format(result) + ", ") while(byte := f.read(1)):
result = int('{:08b}'.format(int.from_bytes(byte, "big"))[::-1], 2)
outputString += "0x" + '{:x}'.format(result) + ", "
q += 1 q += 1
if q >= 16: if q >= 16:
f.write("\n") outputString += "\n"
q = 0 q = 0
f.write(" };") outputString += " };"
print("Done!")
sys.exit(0)
elif version == 1:
print("Version 1 Paint detected...")
width = int.from_bytes(f.read(2), "little")
height = int.from_bytes(f.read(2), "little")
f.seek(28)
q = 0
outputString = outputString.format(filename, width, height)
outputString += " {\n"
while(byte := f.read(1)):
result = int('{:08b}'.format(int.from_bytes(byte, "big"))[::-1], 2)
outputString += "0x" + '{:x}'.format(result) + ", "
q += 1
if q >= 16:
outputString += "\n"
q = 0
outputString += " };"
with open(filename + "_converted.xbm", 'w') as f: with open(filename + "_converted.xbm", 'w') as f:
print("Writing output file...") print("Writing output file...")
f.write(outputString) f.write(outputString)
print("Done!") print("Done!")
sys.exit(0) sys.exit(0)
except FileNotFoundError:
print("{0}.MSP does not exist! Quitting...".format(filename))
sys.exit(255)
except PermissionError:
print("Unable to open {0}.MSP -- insufficient permissions! Quitting...".format(filename))
sys.exit(255)
except Exception:
print("Something went wrong! Quitting...")
sys.exit(255)