def save_as_RDC(self, filename):
raw_author_name = self.metadata["author.name-short"]
author = raw_author_name.encode(
'utf-8') if raw_author_name else bytes()
HEADER_STRING = b"RETRODATACONTAINER"
VERSION = 0x01
blocks_with_type = self.get_rdc_meta_data_block(
) + self.get_rdc_export_blocks()
number_of_blocks = len(blocks_with_type)
preample_length = len(HEADER_STRING) + 1
block_list_length = 4 + number_of_blocks * 8
author_field_length = len(author) + 1
block_offset = preample_length + block_list_length + author_field_length
with open(filename, "wb") as rdc_file:
rdc_file.write(HEADER_STRING)
rdc_file.write(common.as_u8(VERSION))
rdc_file.write(common.as_u32(number_of_blocks))
for block_type, block in blocks_with_type:
rdc_file.write(common.as_u32(block_type))
rdc_file.write(common.as_u32(block_offset))
block_offset += len(block)
rdc_file.write(author)
rdc_file.write(common.as_u8(0))
for _, block in blocks_with_type:
rdc_file.write(block)
rdc_file.close()
return True #indicate success to caller
def save_as_ZSPR(self, filename):
#check to see if the functions exist (e.g. crashes hard if used on Samus)
if hasattr(self, "get_binary_sprite_sheet") and hasattr(
self, "get_binary_palettes"):
sprite_sheet = self.get_binary_sprite_sheet()
palettes = self.get_binary_palettes()
HEADER_STRING = b"ZSPR"
VERSION = 0x01
SPRITE_TYPE = 0x01 #this format has "1" for the player sprite
RESERVED_BYTES = b'\x00\x00\x00\x00\x00\x00'
QUAD_BYTE_NULL_CHAR = b'\x00\x00\x00\x00'
DOUBLE_BYTE_NULL_CHAR = b'\x00\x00'
SINGLE_BYTE_NULL_CHAR = b'\x00'
write_buffer = bytearray()
write_buffer.extend(HEADER_STRING)
write_buffer.extend(common.as_u8(VERSION))
checksum_start = len(write_buffer)
write_buffer.extend(QUAD_BYTE_NULL_CHAR)
sprite_sheet_pointer = len(write_buffer)
write_buffer.extend(QUAD_BYTE_NULL_CHAR)
write_buffer.extend(common.as_u16(len(sprite_sheet)))
palettes_pointer = len(write_buffer)
write_buffer.extend(QUAD_BYTE_NULL_CHAR)
write_buffer.extend(common.as_u16(len(palettes)))
write_buffer.extend(common.as_u16(SPRITE_TYPE))
write_buffer.extend(RESERVED_BYTES)
write_buffer.extend(
self.metadata["sprite.name"].encode('utf-16-le'))
write_buffer.extend(DOUBLE_BYTE_NULL_CHAR)
write_buffer.extend(
self.metadata["author.name"].encode('utf-16-le'))
write_buffer.extend(DOUBLE_BYTE_NULL_CHAR)
write_buffer.extend(
self.metadata["author.name-short"].encode('ascii'))
write_buffer.extend(SINGLE_BYTE_NULL_CHAR)
write_buffer[sprite_sheet_pointer:sprite_sheet_pointer +
4] = common.as_u32(len(write_buffer))
write_buffer.extend(sprite_sheet)
write_buffer[palettes_pointer:palettes_pointer +
4] = common.as_u32(len(write_buffer))
write_buffer.extend(palettes)
checksum = (sum(write_buffer) + 0xFF + 0xFF) % 0x10000
checksum_complement = 0xFFFF - checksum
write_buffer[checksum_start:checksum_start +
2] = common.as_u16(checksum)
write_buffer[checksum_start + 2:checksum_start +
4] = common.as_u16(checksum_complement)
with open(filename, "wb") as zspr_file:
zspr_file.write(write_buffer)
zspr_file.close()
return True #report success to caller
else:
return False #report failure to caller
def get_rdc_meta_data_block(self):
title_name = self.metadata["sprite.name"]
author_name = self.metadata["author.name"]
data = json.dumps({
"title": title_name,
"author": author_name
},
separators=(',', ':')).encode('utf-8')
META_DATA_BLOCK_TYPE = 0
return [(META_DATA_BLOCK_TYPE,
bytearray(common.as_u32(len(data))) + data)]