def save(self, filepath):
names_writer = BinaryStream()
data_writer = BinaryStream()
# shader name is at 0
names_writer.write_zstring(self.shader_name)
# attribs are written first
for attrib in self.attributes:
attrib.offset = names_writer.tell()
names_writer.write_zstring(attrib.name)
attrib.first_value_offset = data_writer.tell()
fmt = dtypes[attrib.dtype]
b = struct.pack("<" + fmt, *attrib.value)
data_writer.write(b)
for texture in self.textures:
if texture.textured:
for i in range(len(texture.indices)):
# uint - hashes
texture.indices[i] = max(0, texture.value[i])
tex_ind = texture.indices[0]
self.texture_names[tex_ind] = texture.name
texture.offset = names_writer.tell()
names_writer.write_zstring(texture.type)
# write the output stream
with self.writer(filepath) as stream:
self.write(stream)
stream.write(b"\x00" * self.zeros_size)
stream.write(data_writer.getvalue())
stream.write(names_writer.getvalue())
def save(self, filepath):
names_writer = BinaryStream()
data_writer = BinaryStream()
# shader name is at 0
names_writer.write_zstring(self.shader_name)
names_writer.write(b"\x00")
# attribs are written first
for attrib in self.attributes:
attrib.offset = names_writer.tell()
names_writer.write_zstring(attrib.name)
attrib.value_offset = data_writer.tell()
b = struct.pack(f"<{dtypes[attrib.dtype]}", *attrib.value)
data_writer.write(b)
self.texture_files.clear()
for texture in self.textures:
# if the texture has a file, store its index
if texture.textured:
texture.indices[0] = len(self.texture_files)
self.texture_files.append(texture.file)
texture.offset = names_writer.tell()
names_writer.write_zstring(texture.name)
# update counts
data_bytes = data_writer.getvalue()
self.data_lib_size = len(data_bytes)
self.dependency_count = len(self.texture_files)
self.fgm_info.texture_count = len(self.textures)
self.fgm_info.attribute_count = len(self.attributes)
# write the output stream
with self.writer(filepath) as stream:
self.write(stream)
stream.write(data_bytes)
stream.write(names_writer.getvalue())
def flush_pointers(self, ignore_unaccounted_bytes=False):
"""Pre-writing step to convert all edits that were done on individual pointers back into the consolidated header
data io block"""
logging.debug(f"Flushing ptrs")
# first, get all ptrs that have data to write
sorted_ptrs_map = sorted(self.pointer_map.items())
stack = []
last_offset = -1
for i, (offset, pointers) in enumerate(sorted_ptrs_map):
for ptr in pointers:
if ptr._data is not None:
if last_offset == offset:
logging.warning(
f"last offset is same as offset {offset}, skipping ptr for update"
)
continue
stack.append((ptr, i, offset))
last_offset = offset
# check if rewriting is needed
if not stack:
return
# create new data writer
data = BinaryStream()
last_offset = 0
logging.debug(f"Stack size = {len(stack)}")
# now go sequentially over all ptrs in the stack
for ptr, i, offset in stack:
from_end_of_last_to_start_of_this = self.get_at(last_offset,
size=offset -
last_offset)
# write old data before this chunk and new data
data.write(from_end_of_last_to_start_of_this)
logging.debug(
f"Flushing stack member {i} at original offset {offset} to {data.tell()}"
)
data.write(ptr._data)
# update offset to end of the original ptr
last_offset = offset + ptr.data_size
# check delta
# todo - padding
ptr._padding_size = ptr.padding_size
delta = (len(ptr._data) + ptr._padding_size) - (ptr.data_size +
ptr.padding_size)
# update new data size on ptr
ptr.data_size = len(ptr._data)
if delta:
# logging.debug(f"data size of stack [len: {len(sorted_ptrs_map)}] member {i} has changed")
# get all ptrs that point into this pool, but after this ptr
if i < len(sorted_ptrs_map):
for offset_later, pointers in sorted_ptrs_map[i + 1:]:
# logging.debug(f"Moving {offset_later} to {offset_later+delta}")
# update their data offsets
for p in pointers:
p.data_offset += delta
# remove from ptr map, so pool can be deleted if it's empty
if not ptr._data:
if offset in self.pointer_map:
logging.debug(f"Removed offset {offset} from pool")
self.pointer_map.pop(offset)
# write the rest of the data
data.write(self.get_at(last_offset))
# clear ptr data and stack
for ptr, i, offset in stack:
ptr._data = None
# overwrite internal data
self.data = data