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98 lines
3.1 KiB
Python
98 lines
3.1 KiB
Python
"""
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LucasArts Font parser.
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Author: Cyril Zorin
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Creation date: 1 January 2007
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"""
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from hachoir.parser import Parser
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from hachoir.field import (FieldSet,
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UInt8, UInt16, UInt32, GenericVector)
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from hachoir.core.endian import LITTLE_ENDIAN
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class CharData(FieldSet):
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def __init__(self, chars, *args):
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FieldSet.__init__(self, *args)
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self.chars = chars
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def createFields(self):
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for char in self.chars:
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yield CharBitmap(char, self, "char_bitmap[]")
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class CharBitmap(FieldSet):
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def __init__(self, char, *args):
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FieldSet.__init__(self, *args)
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self.char = char
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def createFields(self):
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width = self.char["width_pixels"].value
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for line in range(self.char["height_pixels"].value):
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yield GenericVector(self, "line[]", width,
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UInt8, "pixel")
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class CharInfo(FieldSet):
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static_size = 16 * 8
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def createFields(self):
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yield UInt32(self, "data_offset")
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yield UInt8(self, "logical_width")
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yield UInt8(self, "unknown[]")
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yield UInt8(self, "unknown[]")
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yield UInt8(self, "unknown[]")
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yield UInt32(self, "width_pixels")
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yield UInt32(self, "height_pixels")
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class LafFile(Parser):
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PARSER_TAGS = {
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"id": "lucasarts_font",
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"category": "game",
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"file_ext": ("laf",),
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"min_size": 32 * 8,
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"description": "LucasArts Font"
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}
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endian = LITTLE_ENDIAN
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def validate(self):
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if self["num_chars"].value != 256:
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return "Invalid number of characters (%u)" % self["num_chars"].value
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if self["first_char_code"].value != 0:
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return "Invalid of code of first character code (%u)" % self["first_char_code"].value
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if self["last_char_code"].value != 255:
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return "Invalid of code of last character code (%u)" % self["last_char_code"].value
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if self["char_codes/char[0]"].value != 0:
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return "Invalid character code #0 (%u)" % self["char_codes/char[0]"].value
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if self["chars/char[0]/data_offset"].value != 0:
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return "Invalid character #0 offset"
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return True
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def createFields(self):
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yield UInt32(self, "num_chars")
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yield UInt32(self, "raw_font_data_size")
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yield UInt32(self, "max_char_width")
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yield UInt32(self, "min_char_width")
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yield UInt32(self, "unknown[]", 4)
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yield UInt32(self, "unknown[]", 4)
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yield UInt32(self, "first_char_code")
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yield UInt32(self, "last_char_code")
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yield GenericVector(self, "char_codes", self["num_chars"].value,
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UInt16, "char")
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yield GenericVector(self, "chars", self["num_chars"].value,
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CharInfo, "char")
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# character data. we make an effort to provide
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# something more meaningful than "RawBytes:
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# character bitmap data"
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yield CharData(self["chars"], self, "char_data")
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# read to the end
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if self.current_size < self._size:
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yield self.seekBit(self._size, "unknown[]")
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