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This commit is contained in:
Elliot Nunn 2018-12-11 15:48:41 +08:00
parent 3e2f151b6e
commit 408ff20637
3 changed files with 56 additions and 40 deletions
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1
bin/SimpleDeRez
View File

@ -25,6 +25,7 @@ with open(args.resourceFile, 'rb') as f:
resources = macresources.parse_file(f.read(), fake_header_rsrc=args.fakehdr)
try:
rez = macresources.make_rez_code(resources, ascii_clean=args.ascii, extract=args.extract)
sys.stdout.buffer.write(rez)
except BrokenPipeError:
pass # like we get when we pipe into head

26
macresources/FakeResDecompress.py
View File

@ -1,17 +1,25 @@
def GetEncoding(inf):
if not inf.startswith(b'\xA8\x9F\x65\x72'):
encoding = 'unknown'
elif inf[6] == 8:
encoding = 'DonnBits'
elif inf[6] == 9:
defprocID = int.from_bytes(len[8:10], byteorder='big', signed=True)
encoding = 'GreggyBits%d' % defprocID
return encoding
try:
if inf[6] == 8:
encoding = 'DonnBits'
elif inf[6] == 9:
defprocID = int.from_bytes(inf[8:10], byteorder='big', signed=True)
encoding = 'GreggyBits%d' % defprocID
else:
raise ValueError
# print('GetEncoding', encoding)
return encoding
except:
return 'UnknownCompression'
def DecompressResource(inf):
return inf
# print('DecompressResource', GetEncoding(inf))
GetEncoding(inf) # this will need to be called, of course
return b'decompressed ' + inf
def CompressResource(inf, encoding):
# print('CompressResource', encoding)
if inf.startswith(b'decompressed '): inf = inf[16:]
return inf

69
macresources/main.py
View File

@ -1,7 +1,7 @@
import collections
import struct
import enum
from FakeResDecompress import DecompressResource, CompressResource
from .FakeResDecompress import DecompressResource, CompressResource, GetEncoding
FAKE_HEADER_RSRC_TYPE = b'header' # obviously invalid
@ -99,12 +99,10 @@ class ResourceAttrs(enum.IntFlag):
_changed = 0x02 # marks a resource that has been changes since loading from file (should not be seen on disk)
_compressed = 0x01 # "indicates that the resource data is compressed" (only documented in https://github.com/kreativekorp/ksfl/wiki/Macintosh-Resource-File-Format)
def _for_derez(self, cmt_unsupported=True):
def _for_derez(self, strict=True):
mylist = [p.name for p in self.__class__ if self & p]
if any(p.startswith('_') for p in mylist):
arg = '$%02X' % self
if cmt_unsupported: arg += ' /*%s*/' % ', '.join(mylist)
mylist = [arg]
if strict and any(p.startswith('_') for p in mylist):
mylist = ['$%02X' % self]
return mylist
@ -136,6 +134,7 @@ class Resource:
self._cache = None
self._cache_hash = None
if self.attribs & ResourceAttrs._compressed: # may need to fudge this attribute??
self.attribs = ResourceAttrs(self.attribs & ~1)
self.compression_format = GetEncoding(data)
del self.data # so that we can defer decompressing the data, see __getattr__
self._cache = data
@ -147,6 +146,9 @@ class Resource:
def __getattr__(self, attrname): # fear not, this is only for evil System 7 resource compression
if attrname == 'data':
if GetEncoding(self._cache) == 'UnknownCompression':
print('Warning: accessing %r %r, which is compressed in an unknown format' % (self.type, self.id))
self.data = DecompressResource(self._cache)
self._cache_hash = hash_mutable(self.data)
return self.data
@ -172,28 +174,33 @@ class Resource:
# decide now: what raw data will we slap down?
if self.compression_format:
if extract:
attribs = self.attribs - ResourceAttrs._compressed # will this work??
data = self.data
compression_cmt = self.compression_format
if self.compression_format == 'UnknownCompression':
attribs = ResourceAttrs(self.attribs | 1) # at lease Rez will produce the right file
data = self.data # will throw a warning
compression_format = None # no comment
else:
attribs = ResourceAttrs(self.attribs & ~1)
data = self.data
compression_format = self.compression_format
else:
attribs = self.attribs | ResourceAttrs._compressed
attribs = ResourceAttrs(self.attribs | 1)
self._update_cache() # ensures that self._cache is valid
data = self._cache
compression_cmt = None
compression_format = None
else:
attribs = self.attribs - ResourceAttrs._compressed
attribs = ResourceAttrs(self.attribs & ~1)
data = self.data
compression_cmt = None
compression_format = None
return data, attribs, compression_cmt
return data, attribs, compression_format
def _file_repr(self):
if self.compression_format:
attribs = self.attribs | ResourceAttrs._compressed
attribs = ResourceAttrs(self.attribs | 1)
self._update_cache() # ensures that self._cache is valid
data = self._cache
else:
attribs = self.attribs - ResourceAttrs._compressed
attribs = ResourceAttrs(self.attribs & ~1)
data = self.data
return data, attribs
@ -257,12 +264,6 @@ def parse_rez_code(from_rezcode):
for line in from_rezcode.split(b'\n'):
line = line.lstrip()
while b'/*' in line:
a, b, c = line.partition(b'/*')
d, e, f = c.partition(b'*/')
line = a + f
if line.startswith(b'data '):
try:
yield cur_resource
@ -287,6 +288,12 @@ def parse_rez_code(from_rezcode):
line = line[1:]
args.append(('nonstring', arg))
compression_format = None
line = line[1:].lstrip() # clip off the closing paren
if line.startswith(b'/* Compress: '):
line = line[13:]
compression_format = line.split()[0].decode('ascii')
rsrcname = None
rsrcattrs = ResourceAttrs(0)
@ -307,6 +314,7 @@ def parse_rez_code(from_rezcode):
rsrcattrs |= newattr
cur_resource = Resource(type=rsrctype, id=rsrcid, name=rsrcname, attribs=rsrcattrs)
cur_resource.compression_format = compression_format
elif line.startswith(b'$"'):
hexdat = line[2:].partition(b'"')[0]
@ -338,13 +346,14 @@ def make_file(from_iter, align=1):
continue
wrapped = wrap(r)
data, wrapped.attribs = r._file_repr()
while len(accum) % align:
accum.extend(b'\x00')
wrapped.data_offset = len(accum)
accum.extend(struct.pack('>L', len(r.data)))
accum.extend(r.data)
accum.extend(struct.pack('>L', len(data)))
accum.extend(data)
if r.type not in bigdict:
bigdict[r.type] = []
@ -378,9 +387,8 @@ def make_file(from_iter, align=1):
this_name_offset = 0xFFFF
else:
this_name_offset = res.name_offset - namelist_offset
attribs = int(res.obj.attribs)
this_data_offset = res.data_offset - data_offset
mixedfield = (attribs << 24) | this_data_offset
mixedfield = (int(attribs) << 24) | this_data_offset
struct.pack_into('>hHL', accum, counter, res.obj.id, this_name_offset, mixedfield)
counter += 12
@ -421,7 +429,7 @@ def make_rez_code(from_iter, ascii_clean=False, extract=False):
lines = []
for resource in from_iter:
data, attribs, compression_cmt = resource._rez_repr(extract=extract)
data, attribs, compression_format = resource._rez_repr(extract=extract)
args = []
args.append(str(resource.id).encode('ascii'))
@ -432,11 +440,10 @@ def make_rez_code(from_iter, ascii_clean=False, extract=False):
fourcc = _rez_escape(resource.type, singlequote=True, ascii_clean=ascii_clean)
if compression_cmt: lines.append(b'/* Compression: %s */' % compression_cmt.encode('mac_roman'))
if resource.type == FAKE_HEADER_RSRC_TYPE:
lines.append(b'#if 0')
lines.append(b'data %s (%s) {' % (fourcc, args))
if compression_format: lines[-1] += b' /* Compress: %s */' % compression_format.encode('mac_roman')
step = 16
@ -454,8 +461,8 @@ def make_rez_code(from_iter, ascii_clean=False, extract=False):
mode = False
whole_preview[i] = themap[thisone]
for ofs in range(0, len(resource.data), step):
linedat = resource.data[ofs:ofs+step]
for ofs in range(0, len(data), step):
linedat = data[ofs:ofs+step]
line = ' '.join(linedat[i:i+2].hex() for i in range(0, len(linedat), 2)).encode('ascii')
line = line.upper()
line = b'\t$"%s"' % line