Difference between revisions of "Talk:Project Gotham Racing 2"

From xboxdevwiki
Jump to: navigation, search
(Added more chunk types and some basic info)
(→‎Hacky python script to extract PAK textures: new section)
Line 202: Line 202:
  
 
The ''00000004.dat'' file contain the '''start address offset''' of the vertices and UV section in the '''GPUD'''. If the 3D mesh have multiples groups/sections, the VB file will store each address.
 
The ''00000004.dat'' file contain the '''start address offset''' of the vertices and UV section in the '''GPUD'''. If the 3D mesh have multiples groups/sections, the VB file will store each address.
 +
 +
== Hacky python script to extract PAK textures ==
 +
 +
<pre>
 +
#!/usr/bin/env python3
 +
 +
# Project Gotham Racing 2 (.pak)
 +
# Originally a script for QuickBMS http://quickbms.aluigi.org
 +
 +
# comtype unzip_dynamic
 +
 +
import sys
 +
import struct
 +
import zlib
 +
from PIL import Image
 +
 +
def readLong(f):
 +
  return struct.unpack('<I', f.read(4))[0]
 +
 +
def clog(f, NAME, OFFSET, ZSIZE, SIZE):
 +
  print('Exporting ' + NAME + ' (Compressed) from ' + str(OFFSET)) #FIXME: Export
 +
  f.seek(OFFSET)
 +
  compressed = f.read(ZSIZE)
 +
  #print(compressed)
 +
  data = bytes()
 +
  try:
 +
    decompress = zlib.decompressobj(15)
 +
    for b in compressed:
 +
      data += decompress.decompress(compressed)
 +
  except:
 +
    print("Decompression failed after " + str(len(data)) + ' / ' + str(SIZE) + ' bytes')
 +
    with open(NAME, 'wb') as e:
 +
      e.write(data)
 +
    #print(data)
 +
  return data
 +
 +
def log(f, NAME, OFFSET, ZSIZE):
 +
  f.seek(OFFSET)
 +
  data = f.read(ZSIZE)
 +
  print('Exporting ' + NAME) #FIXME: Export
 +
  with open(NAME, 'wb') as e:
 +
    e.write(data)
 +
  return data
 +
 +
textures = []
 +
gpud = bytes([])
 +
 
 +
def readChunk(f, indexed = False): 
 +
    global gpud
 +
    global textures
 +
 +
    print("At " + str(f.tell()))
 +
 +
    chunkType = f.read(4)
 +
    NAME = chunkType.decode('ascii').rstrip('\0') # FIXME: Remove?!
 +
    print("Found chunk " + NAME)
 +
 +
    DUMMY = readLong(f)
 +
    SIZE = readLong(f)
 +
 +
    print("Dummy " + str(DUMMY))
 +
    print("Size " + str(SIZE))
 +
 +
    if indexed == True:
 +
      OFFSET = readLong(f) + 0xC
 +
    else:
 +
      OFFSET = f.tell()
 +
 +
    TMP = f.tell()
 +
 +
    if chunkType == b'INDX':
 +
      print("Reading index?!")
 +
      FILES = readLong(f)
 +
 +
      for i in range(0, FILES):
 +
        readChunk(f, True)
 +
     
 +
      f.read(SIZE - FILES * 16 - 4)
 +
 +
      return
 +
 +
    elif chunkType == b'WMSH':
 +
      pass
 +
    elif chunkType == b'SKY\0':
 +
      pass
 +
    elif chunkType == b'WRAP':
 +
      pass
 +
    elif chunkType == b'INST':
 +
      pass
 +
    elif chunkType == b'MAT\0':
 +
      pass
 +
    elif chunkType == b'TIME':
 +
      pass
 +
    elif chunkType == b'RCAM':
 +
      pass
 +
    elif chunkType == b'ANIC':
 +
      pass
 +
    elif chunkType == b'ROUT':
 +
      pass
 +
    elif chunkType == b'RPRM':
 +
      pass
 +
    elif chunkType == b'RTMP':
 +
      pass
 +
    elif chunkType == b'GPUD':
 +
      pass
 +
    elif chunkType == b'GPUS':
 +
      pass
 +
    elif chunkType == b'TEX\0':
 +
      pass
 +
    elif chunkType == b'LGHT':
 +
      pass
 +
    elif chunkType == b'ACT\0':
 +
      pass
 +
    elif chunkType == b'VB\0\0':
 +
      offset = readLong(f) #FIXME: Don't read here!
 +
      print("VB at " + str(offset))
 +
    elif chunkType == b'INFO':
 +
      pass
 +
    elif chunkType == b'DRVP':
 +
      pass
 +
    elif chunkType == b'TVC\0':
 +
      pass
 +
    elif chunkType == b'MESH':
 +
      pass
 +
    elif chunkType == b'TEXT':
 +
      pass
 +
    elif chunkType == b'AUDI':
 +
      pass
 +
    elif chunkType == b'END\0':
 +
      assert(SIZE == 0)
 +
      return
 +
 +
    else:
 +
      print("Unknown chunk type: " + NAME)
 +
      print(chunkType)
 +
      assert(False)
 +
 +
    f.seek(TMP)
 +
 +
    if indexed == True:
 +
      f.seek(OFFSET)
 +
 +
    if SIZE & 0xC0000000: #FIXME: Figure out actual use of these 2 bits
 +
      ZSIZE = SIZE & 0x3FFFFFFF
 +
      SIZE = readLong(f)
 +
      print("c-zSize is " + str(ZSIZE))
 +
      print("c-Size is " + str(SIZE))
 +
      OFFSET = f.tell()
 +
      data = clog(f, NAME, OFFSET, ZSIZE - 4, SIZE)
 +
    else:
 +
      TMP_SIGN = f.read(4)
 +
      if TMP_SIGN == b'COLR':
 +
 +
        ZERO = readLong(f)
 +
        ZSIZE = readLong(f)
 +
        SIZE = readLong(f)
 +
        print("zSize is " + str(ZSIZE))
 +
        print("Size is " + str(SIZE))
 +
        OFFSET = f.tell()
 +
        if ZSIZE & 0xC0000000: #FIXME: Figure out actual use of these 2 bits
 +
          ZSIZE = ZSIZE & 0x3FFFFFFF
 +
          print("c-zSize is " + str(ZSIZE))
 +
          data = clog(f, NAME, OFFSET, ZSIZE, SIZE)
 +
        else:
 +
          data = log(f, NAME, OFFSET, ZSIZE)
 +
      else:
 +
        data = log(f, NAME, OFFSET, SIZE)
 +
 +
    if chunkType == b'WMSH':
 +
      offset = 52
 +
      for i in range(0, 1000):
 +
        print(struct.unpack('<H', data[offset:offset+2])[0])
 +
        offset += 2
 +
    elif chunkType == b'GPUD':
 +
 +
      gpud = data
 +
 +
      offset = 87424
 +
      for i in range(0, 1000):
 +
        if False:
 +
          x = struct.unpack('<f', data[offset:offset+4])[0]
 +
          offset += 4
 +
          y = struct.unpack('<f', data[offset:offset+4])[0]
 +
          offset += 4
 +
          z = struct.unpack('<f', data[offset:offset+4])[0]
 +
          offset += 4
 +
          color = 0
 +
          print("v %f, %f, %f, 0x%08X" % (x, y, z, color))
 +
 +
        # The start of the file is closer to this
 +
        if False:
 +
          x = struct.unpack('<f', data[offset:offset+4])[0]
 +
          offset += 4
 +
          y = struct.unpack('<f', data[offset:offset+4])[0]
 +
          offset += 4
 +
          z = struct.unpack('<f', data[offset:offset+4])[0]
 +
          offset += 4
 +
          color = struct.unpack('<I', data[offset:offset+4])[0]
 +
          offset += 4
 +
          print("v %f, %f, %f, 0x%08X" % (x, y, z, color))
 +
    elif chunkType == b'TEXT':
 +
      offset = 0
 +
      count = struct.unpack('<I', data[offset:offset+4])[0]
 +
      offset += 4
 +
      print(str(count) + " car texture(s):")
 +
      for i in range(count):
 +
        name = data[offset:offset+32]
 +
        offset += 32
 +
        dataOffset = struct.unpack('<I', data[offset:offset+4])[0]
 +
        offset += 4
 +
        print("  Texture name: " + name.decode('ascii').rstrip('\0') + " @ " + str(dataOffset))
 +
 +
      #FIXME: There is more data here, at least 4 byte!
 +
      #count = struct.unpack('<I', data[offset:offset+4])[0]
 +
      #print(str(count) + " Unknown(s):")
 +
    elif chunkType == b'TEX\0':
 +
      offset = 0
 +
      count = struct.unpack('<I', data[offset:offset+4])[0]
 +
      offset += 4
 +
      print(str(count) + " world texture(s):")
 +
      for i in range(count):
 +
        name = data[offset:offset+32]
 +
        offset += 32
 +
        a1 = struct.unpack('<H', data[offset:offset+2])[0]
 +
        offset += 2
 +
        a2 = struct.unpack('<H', data[offset:offset+2])[0]
 +
        offset += 2
 +
        b = struct.unpack('<I', data[offset:offset+4])[0]
 +
        offset += 4
 +
        c = struct.unpack('<I', data[offset:offset+4])[0]
 +
        offset += 4
 +
        d = struct.unpack('<I', data[offset:offset+4])[0]
 +
        offset += 4
 +
 +
        h = 1 << (a2 & 0xF)
 +
        w = 1 << ((a2 >> 4) & 0xF)
 +
        print("Size: " + str(w) + "x" + str(h) + " (End: 0x%08X)" % (b + (w * h * 4)//3))
 +
 +
        someH = 1 << (d & 0xF)
 +
        someW = 1 << ((d >> 4) & 0xF)
 +
        print("Max. Size (?): " + str(someW) + "x" + str(someH))
 +
 +
        #FIXME: a?
 +
        gpudOffset = b
 +
        #FIXME: c?
 +
        #FIXME: d?
 +
 +
        texture = {}
 +
        texture['name'] = name.decode('ascii').rstrip('\0')
 +
        texture['offset'] = gpudOffset
 +
        texture['width'] = w
 +
        texture['height'] = h
 +
        texture['format'] = a1
 +
        textures += [texture]
 +
 +
        print("  Texture name: " + texture['name'] + "\n @ 0x%04X 0x%04X 0x%08X 0x%08X 0x%08X " % (a1,a2,b,c,d))
 +
 +
 +
        print("\n")
 +
      #FIXME: There is more data here, at least 4 byte!
 +
      #count = struct.unpack('<I', data[offset:offset+4])[0]
 +
      #print(str(count) + " Unknown(s):")
 +
    elif chunkType == b'AUDI':
 +
      offset = 0
 +
      count = struct.unpack('<I', data[offset:offset+4])[0]
 +
      offset += 4
 +
      print(str(count) + " audio sample(s) (???):")
 +
      for i in range(count):
 +
        name = data[offset:offset+4]
 +
        offset += 4
 +
        print("  Name: " + str(name))
 +
        #FIXME: Read rest of data
 +
        offset += 12
 +
    elif chunkType == b'MAT\0':
 +
      offset = 0
 +
      count = struct.unpack('<I', data[offset:offset+4])[0]
 +
      offset += 4
 +
      print(str(count) + " material(s):")
 +
      for i in range(count):
 +
        a = struct.unpack('<H', data[offset:offset+2])[0]
 +
        offset += 2
 +
        b = struct.unpack('<H', data[offset:offset+2])[0]
 +
        offset += 2
 +
        c = struct.unpack('<H', data[offset:offset+2])[0]
 +
        offset += 2
 +
        d = struct.unpack('<H', data[offset:offset+2])[0]
 +
        offset += 2
 +
        print("  Material: 0x%04X, 0x%04X, 0x%04X, 0x%04X" % (a, b, c, d))
 +
      #FIXME: Read rest of data
 +
 +
    if indexed == True:
 +
      f.seek(TMP)
 +
 +
with open(sys.argv[1], 'rb') as f:
 +
  while True:
 +
    tmp = f.tell()
 +
    try:
 +
      if f.read(1) == b'':
 +
        raise
 +
    except:
 +
      print("EOF?!")
 +
      break
 +
    f.seek(tmp)
 +
    readChunk(f)
 +
 
 +
  for texture in textures:
 +
    #with open(str(texture['name']) + ".raw",'wb') as e:
 +
      # DXT3 = 1 byte per pixel
 +
      print("Exporting " + texture['name'] + " (%d x %d)" % (texture['width'], texture['height']))
 +
      size = texture['width'] * texture['height']
 +
      if texture['width'] < 4:
 +
        print("Texture too small!") # FIXME!!!
 +
        continue
 +
      data = gpud[texture['offset']:texture['offset']+size]
 +
      if texture['format'] == 0x0414:
 +
        image = Image.frombytes('RGBA', (texture['width'], texture['height']), data, 'bcn', 3)
 +
      elif texture['format'] == 0x041C:
 +
        image = Image.frombytes('RGBA', (texture['width'], texture['height']), data, 'bcn', 3)
 +
      elif texture['format'] == 0x021C:
 +
        image = Image.frombytes('RGBA', (texture['width'], texture['height']), data, 'bcn', 1)
 +
      else:
 +
        print("Unknown format! 0x%04X" %  texture['format'])
 +
        image = None
 +
      if image:
 +
        image.save(texture['name'] + "-0x%04X" % texture['format'] + ".png")
 +
      #e.write()
 +
</pre>
 +
 +
--[[User:JayFoxRox|JayFoxRox]] ([[User talk:JayFoxRox|talk]]) 09:38, 23 September 2017 (PDT)

Revision as of 16:38, 23 September 2017

Reverse engineering notes for file formats

--Zaykho (talk) 10:34, 22 September 2017 (PDT)


Project Gotham Racing 2 use a .PAK container for storing 3D elements, textures and 3D configurations files.

Multiple types of .PAK name can be seen in PGR2, their names are related to their functions and indicate what type of elements are stored:


.PAK for objects ( Cache\Objects & Cache\Cars )

.pak


.PAK for cars ( Cache\Cars )

.pak_cth

.pak_hrd

.pak_opn ( only for roadster : open mode)

.pak_sft ( only for roadster : closed mode for rain)


.PAK for maps ( Game\Areas )

.pak_common

.pak_day

.pak_night

.pak_overcast

.pak_stream (This uses a non-standard PAK format)


To extract those .PAK files, a tool called quickbms and a PGR2 bms script ( both made by Luigi Auriemma ) can be used to get most of the contents stored in the archive.

When extracted, the content stored in the archive is sliced in sections, creating a folder for each of them and joining a file with the actual contents in it, mostly with a .dat suffix.

Here an example for objects:


.PAK for object : red_cone.pak

WMSH \ 00000000.dat

MAT \ 00000001.dat

GPUD \ 00000002.dat

TEXT \ 00000003.nfc

VB \ 00000004.dat

END ( nothing, no folder, no files )

PAK File format

The PAK format is a chunked format. Each chunk starts with:

  • u32 chunk-type (can be interpreted as 4 byte ASCII magic)
  • u32 unknown
  • u32 size of chunk (excluding this field?)

The chunk can contain compressed or uncompressed data. Compression is probably indicated by the upper bits of the size (0xC0000000) being set. Compression seems to be with a zlib header (0x78, 0xDA).

Data can be inline, directly following the header. However, in INDX chunks, the data is pointed to by an extra u32 field after each header.


INDX

  • u32: number of chunks
  • array of chunk headers, each with additional u32 field pointing to the data
  • array of chunk data

WMSH

The 00000000.dat file contain the faces indices, and supposedly, the strip and the how the vertices are read ( float, word ? ).

MESH

Same as WMSH?

MAT

Material properties

The 00000001.dat file contain the material properties : diffuse, specular, ambient etc... of each material applied to the 3D file.

SKY

WRAP

INST

Header has some field set to != 0. Seems to contain subchunks which end with "END" chunk?

TIME

RCAM

ANIC

ROUT

RPRM

RTMP

GPUD

GPUS

TEX

LGHT

ACT

INFO

DRVP

AUDI

TVC

END

Marks the end of the file. Can also be inside a file and might mark the end of a subchunk there?

GPUD

GPU Data?

The 00000002.dat file contain all the textures, each of them followed by a small part of data ( texture configuration ? mipmaps ? ). Finally, after all the textures, the vertices and UV position are stored in one chunk of data.

TEXT

Texture information

The 00000003.dat file contain all the text and name related to the texture, it also indicate where each textures are located inside GPUD.

VB

Vertex buffer information

The 00000004.dat file contain the start address offset of the vertices and UV section in the GPUD. If the 3D mesh have multiples groups/sections, the VB file will store each address.

Hacky python script to extract PAK textures

#!/usr/bin/env python3

# Project Gotham Racing 2 (.pak)
# Originally a script for QuickBMS http://quickbms.aluigi.org

# comtype unzip_dynamic

import sys
import struct
import zlib
from PIL import Image

def readLong(f):
  return struct.unpack('<I', f.read(4))[0]

def clog(f, NAME, OFFSET, ZSIZE, SIZE):
  print('Exporting ' + NAME + ' (Compressed) from ' + str(OFFSET)) #FIXME: Export
  f.seek(OFFSET)
  compressed = f.read(ZSIZE)
  #print(compressed)
  data = bytes()
  try:
    decompress = zlib.decompressobj(15)
    for b in compressed:
      data += decompress.decompress(compressed)
  except:
    print("Decompression failed after " + str(len(data)) + ' / ' + str(SIZE) + ' bytes')
    with open(NAME, 'wb') as e:
      e.write(data)
    #print(data)
  return data

def log(f, NAME, OFFSET, ZSIZE):
  f.seek(OFFSET)
  data = f.read(ZSIZE)
  print('Exporting ' + NAME) #FIXME: Export
  with open(NAME, 'wb') as e:
    e.write(data)
  return data

textures = []
gpud = bytes([])
  
def readChunk(f, indexed = False):  
    global gpud
    global textures

    print("At " + str(f.tell()))

    chunkType = f.read(4)
    NAME = chunkType.decode('ascii').rstrip('\0') # FIXME: Remove?!
    print("Found chunk " + NAME)

    DUMMY = readLong(f)
    SIZE = readLong(f)

    print("Dummy " + str(DUMMY))
    print("Size " + str(SIZE))

    if indexed == True:
      OFFSET = readLong(f) + 0xC
    else:
      OFFSET = f.tell()

    TMP = f.tell()

    if chunkType == b'INDX':
      print("Reading index?!")
      FILES = readLong(f)

      for i in range(0, FILES):
        readChunk(f, True)
      
      f.read(SIZE - FILES * 16 - 4)

      return

    elif chunkType == b'WMSH':
      pass
    elif chunkType == b'SKY\0':
      pass
    elif chunkType == b'WRAP':
      pass
    elif chunkType == b'INST':
      pass
    elif chunkType == b'MAT\0':
      pass
    elif chunkType == b'TIME':
      pass
    elif chunkType == b'RCAM':
      pass
    elif chunkType == b'ANIC':
      pass
    elif chunkType == b'ROUT':
      pass
    elif chunkType == b'RPRM':
      pass
    elif chunkType == b'RTMP':
      pass
    elif chunkType == b'GPUD':
      pass
    elif chunkType == b'GPUS':
      pass
    elif chunkType == b'TEX\0':
      pass
    elif chunkType == b'LGHT':
      pass
    elif chunkType == b'ACT\0':
      pass
    elif chunkType == b'VB\0\0':
      offset = readLong(f) #FIXME: Don't read here!
      print("VB at " + str(offset))
    elif chunkType == b'INFO':
      pass
    elif chunkType == b'DRVP':
      pass
    elif chunkType == b'TVC\0':
      pass
    elif chunkType == b'MESH':
      pass
    elif chunkType == b'TEXT':
      pass
    elif chunkType == b'AUDI':
      pass
    elif chunkType == b'END\0':
      assert(SIZE == 0)
      return

    else:
      print("Unknown chunk type: " + NAME)
      print(chunkType)
      assert(False)

    f.seek(TMP)

    if indexed == True:
      f.seek(OFFSET)

    if SIZE & 0xC0000000: #FIXME: Figure out actual use of these 2 bits
      ZSIZE = SIZE & 0x3FFFFFFF
      SIZE = readLong(f)
      print("c-zSize is " + str(ZSIZE))
      print("c-Size is " + str(SIZE))
      OFFSET = f.tell()
      data = clog(f, NAME, OFFSET, ZSIZE - 4, SIZE)
    else:
      TMP_SIGN = f.read(4)
      if TMP_SIGN == b'COLR':

        ZERO = readLong(f)
        ZSIZE = readLong(f)
        SIZE = readLong(f)
        print("zSize is " + str(ZSIZE))
        print("Size is " + str(SIZE))
        OFFSET = f.tell()
        if ZSIZE & 0xC0000000: #FIXME: Figure out actual use of these 2 bits
          ZSIZE = ZSIZE & 0x3FFFFFFF
          print("c-zSize is " + str(ZSIZE))
          data = clog(f, NAME, OFFSET, ZSIZE, SIZE)
        else:
          data = log(f, NAME, OFFSET, ZSIZE)
      else:
        data = log(f, NAME, OFFSET, SIZE)

    if chunkType == b'WMSH':
      offset = 52
      for i in range(0, 1000):
        print(struct.unpack('<H', data[offset:offset+2])[0])
        offset += 2
    elif chunkType == b'GPUD':

      gpud = data

      offset = 87424
      for i in range(0, 1000):
        if False:
          x = struct.unpack('<f', data[offset:offset+4])[0]
          offset += 4
          y = struct.unpack('<f', data[offset:offset+4])[0]
          offset += 4
          z = struct.unpack('<f', data[offset:offset+4])[0]
          offset += 4
          color = 0
          print("v %f, %f, %f, 0x%08X" % (x, y, z, color))

        # The start of the file is closer to this
        if False:
          x = struct.unpack('<f', data[offset:offset+4])[0]
          offset += 4
          y = struct.unpack('<f', data[offset:offset+4])[0]
          offset += 4
          z = struct.unpack('<f', data[offset:offset+4])[0]
          offset += 4
          color = struct.unpack('<I', data[offset:offset+4])[0]
          offset += 4
          print("v %f, %f, %f, 0x%08X" % (x, y, z, color))
    elif chunkType == b'TEXT':
      offset = 0
      count = struct.unpack('<I', data[offset:offset+4])[0]
      offset += 4
      print(str(count) + " car texture(s):")
      for i in range(count):
        name = data[offset:offset+32]
        offset += 32
        dataOffset = struct.unpack('<I', data[offset:offset+4])[0]
        offset += 4
        print("  Texture name: " + name.decode('ascii').rstrip('\0') + " @ " + str(dataOffset))

      #FIXME: There is more data here, at least 4 byte!
      #count = struct.unpack('<I', data[offset:offset+4])[0]
      #print(str(count) + " Unknown(s):")
    elif chunkType == b'TEX\0':
      offset = 0
      count = struct.unpack('<I', data[offset:offset+4])[0]
      offset += 4
      print(str(count) + " world texture(s):")
      for i in range(count):
        name = data[offset:offset+32]
        offset += 32
        a1 = struct.unpack('<H', data[offset:offset+2])[0]
        offset += 2
        a2 = struct.unpack('<H', data[offset:offset+2])[0]
        offset += 2
        b = struct.unpack('<I', data[offset:offset+4])[0]
        offset += 4
        c = struct.unpack('<I', data[offset:offset+4])[0]
        offset += 4
        d = struct.unpack('<I', data[offset:offset+4])[0]
        offset += 4

        h = 1 << (a2 & 0xF)
        w = 1 << ((a2 >> 4) & 0xF)
        print("Size: " + str(w) + "x" + str(h) + " (End: 0x%08X)" % (b + (w * h * 4)//3))

        someH = 1 << (d & 0xF)
        someW = 1 << ((d >> 4) & 0xF)
        print("Max. Size (?): " + str(someW) + "x" + str(someH))

        #FIXME: a?
        gpudOffset = b
        #FIXME: c?
        #FIXME: d?

        texture = {}
        texture['name'] = name.decode('ascii').rstrip('\0')
        texture['offset'] = gpudOffset
        texture['width'] = w
        texture['height'] = h
        texture['format'] = a1
        textures += [texture]

        print("  Texture name: " + texture['name'] + "\n @ 0x%04X 0x%04X 0x%08X 0x%08X 0x%08X " % (a1,a2,b,c,d))


        print("\n")
      #FIXME: There is more data here, at least 4 byte!
      #count = struct.unpack('<I', data[offset:offset+4])[0]
      #print(str(count) + " Unknown(s):")
    elif chunkType == b'AUDI':
      offset = 0
      count = struct.unpack('<I', data[offset:offset+4])[0]
      offset += 4
      print(str(count) + " audio sample(s) (???):")
      for i in range(count):
        name = data[offset:offset+4]
        offset += 4
        print("  Name: " + str(name))
        #FIXME: Read rest of data
        offset += 12
    elif chunkType == b'MAT\0':
      offset = 0
      count = struct.unpack('<I', data[offset:offset+4])[0]
      offset += 4
      print(str(count) + " material(s):")
      for i in range(count):
        a = struct.unpack('<H', data[offset:offset+2])[0]
        offset += 2
        b = struct.unpack('<H', data[offset:offset+2])[0]
        offset += 2
        c = struct.unpack('<H', data[offset:offset+2])[0]
        offset += 2
        d = struct.unpack('<H', data[offset:offset+2])[0]
        offset += 2
        print("  Material: 0x%04X, 0x%04X, 0x%04X, 0x%04X" % (a, b, c, d))
      #FIXME: Read rest of data

    if indexed == True:
      f.seek(TMP)

with open(sys.argv[1], 'rb') as f:
  while True:
    tmp = f.tell()
    try:
      if f.read(1) == b'':
        raise
    except:
      print("EOF?!")
      break
    f.seek(tmp)
    readChunk(f)
  
  for texture in textures:
    #with open(str(texture['name']) + ".raw",'wb') as e:
      # DXT3 = 1 byte per pixel
      print("Exporting " + texture['name'] + " (%d x %d)" % (texture['width'], texture['height']))
      size = texture['width'] * texture['height']
      if texture['width'] < 4:
        print("Texture too small!") # FIXME!!!
        continue
      data = gpud[texture['offset']:texture['offset']+size]
      if texture['format'] == 0x0414:
        image = Image.frombytes('RGBA', (texture['width'], texture['height']), data, 'bcn', 3)
      elif texture['format'] == 0x041C:
        image = Image.frombytes('RGBA', (texture['width'], texture['height']), data, 'bcn', 3)
      elif texture['format'] == 0x021C:
        image = Image.frombytes('RGBA', (texture['width'], texture['height']), data, 'bcn', 1)
      else:
        print("Unknown format! 0x%04X" %  texture['format'])
        image = None
      if image:
        image.save(texture['name'] + "-0x%04X" % texture['format'] + ".png")
      #e.write()

--JayFoxRox (talk) 09:38, 23 September 2017 (PDT)

Retrieved from "https://xboxdevwiki.net/index.php?title=Talk:Project_Gotham_Racing_2&oldid=6244"