Class: Bayonetta::SCRFile

Inherits:
Object
  • Object
show all
Includes:
Alignment, Endianness
Defined in:
lib/bayonetta/scr.rb

Constant Summary collapse

ALIGNMENTS = 
{
  'wmb' => 0x20,
  'wtb' => 0x1000,
}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(f = nil, big = false) ⇒ SCRFile

Returns a new instance of SCRFile.



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# File 'lib/bayonetta/scr.rb', line 246

def initialize(f = nil, big = false)
  @big = big
  if f
    file_name_input = false
    unless f.respond_to?(:read) && f.respond_to?(:seek)
      file_name_input = true
      f = File::new(f, "rb")
    end
    @big = SCRFile.is_big?(f)

    f.rewind
    uint = get_uint

    @id = f.read(4)
    raise "Invalid id #{id.inspect}!" if @id != "SCR\0".b
    @num_models = f.read(4).unpack(uint).first
    @offset_texture = f.read(4).unpack(uint).first
    @unknown = f.read(4)
    flt = get_float
    sh = get_short
    @offsets_models = []
    @sizes_models = []
    @models_metadata = @num_models.times.collect {
      pos = f.tell
      name = f.read(16)
      offset = f.read(4).unpack(uint).first
      transform = f.read(4*9).unpack("#{flt}9")
      u_a = f.read(42*2).unpack("#{sh}42")
      @offsets_models.push(pos + offset)
      {
        name: name,
        transform: transform,
        u_a: u_a
      }
    }
    @num_models.times { |i|
      if i == ( @num_models - 1 )
        @sizes_models.push( @offset_texture - @offsets_models[i] )
      else
        @sizes_models.push( @offsets_models[i+1] - @offsets_models[i] )
      end
    }
    @size_textures = f.size - @offset_texture
    @models = @num_models.times.collect { |i|
      f.seek(@offsets_models[i])
      StringIO::new( f.read(@sizes_models[i]), "rb")
    }
    f.seek(@offset_texture)
    @textures = StringIO::new( f.read(@size_textures), "rb")
    @total_size = f.size
    f.close if file_name_input
  else
    @id = "SCR\0".b
    @num_models = 0
    @offset_texture = 0
    @size_textures = 0
    @unknown = "\1\0\0\0".b
    @offsets_models = []
    @sizes_models = []
    @models_metadata = []
    @models = []
    @textures = nil
    @total_size = 0
  end
end

Instance Attribute Details

#big ⇒ Object (readonly)

Returns the value of attribute big.



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# File 'lib/bayonetta/scr.rb', line 192

def big
  @big
end

#models_metadata ⇒ Object

Returns the value of attribute models_metadata.



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# File 'lib/bayonetta/scr.rb', line 194

def models_metadata
  @models_metadata
end

#unknown ⇒ Object

Returns the value of attribute unknown.



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# File 'lib/bayonetta/scr.rb', line 193

def unknown
  @unknown
end

Class Method Details

.is_bayo2?(f) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/bayonetta/scr.rb', line 222

def self.is_bayo2?(f)
  f.rewind
  id = f.read(4)
  raise "Invalid id #{id.inspect}!" if id != "SCR\0".b
  a, b = f.read(4).unpack("S2")
  f.rewind
  a > 0 && b > 0
end

.is_big?(f) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/bayonetta/scr.rb', line 205

def self.is_big?(f)
  f.rewind
  block = lambda { |int|
    id = f.read(4)
    raise "Invalid id #{id.inspect}!" if id != "SCR\0".b
    model_number = f.read(4).unpack(int).first
    offset_texture = f.read(4).unpack(int).first
    ( model_number >= 0 ) && ( (model_number * 0x8c + 0x10) < f.size  ) && ( offset_texture >= 0 ) && ( offset_texture < f.size )
  }
  big = block.call("l>")
  f.rewind
  small = block.call("l<")
  f.rewind
  raise "Invalid data!" unless big ^ small
  return big
end

.load(f) ⇒ Object 



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# File 'lib/bayonetta/scr.rb', line 231

def self.load(f)
  file_name_input = false
  unless f.respond_to?(:read) && f.respond_to?(:seek)
    f = File::new(f, "rb")
    file_name_input = true
  end
  if is_bayo2?(f)
    scr = SCR2File::new(f)
  else
    scr = SCRFile::new(f)
  end
  f.close if file_name_input
  scr
end

Instance Method Details

#[](i) ⇒ Object 



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# File 'lib/bayonetta/scr.rb', line 322

def [](i)
  return @models[i]
end

#bayo2? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/bayonetta/scr.rb', line 201

def bayo2?
  false
end

#compute_layout ⇒ Object 



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# File 'lib/bayonetta/scr.rb', line 333

def compute_layout
  current_offset = 0x10 + 0x8c * @num_models
  @offsets_models = @num_models.times.collect { |i|
     tmp = align(current_offset, ALIGNMENTS["wmb"])
     current_offset = tmp + @sizes_models[i]
     tmp
  }
  @offset_texture = align(current_offset, ALIGNMENTS["wtb"])
  @total_size = @offset_texture + @size_textures
  self
end

#dump(name) ⇒ Object 



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# File 'lib/bayonetta/scr.rb', line 364

def dump(name)
  compute_layout
  uint = get_uint
  File.open(name,"wb") { |f|
    f.write("\0"*@total_size)
    f.rewind
    f.write([@id].pack("a4"))
    f.write([@num_models].pack(uint))
    f.write([@offset_texture].pack(uint))
    f.write([@unknown].pack("a4"))
    @num_models.times { |i|
      pos = f.tell
      f.write([@models_metadata[i][:name]].pack("a16"))
      f.write([@offsets_models[i] - pos].pack(uint))
      f.write(@models_metadata[i][:transform].pack("#{get_float}9"))
      f.write(@models_metadata[i][:u_a].pack("#{get_short}42"))
    }
    @offsets_models.each_with_index { |off, i|
      f.seek(off)
      @models[i].rewind
      f.write(@models[i].read)
    }
    f.seek(@offset_texture)
    @textures.rewind
    f.write(@textures.read)
  }
  self
end

#each_model ⇒ Object 



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# File 'lib/bayonetta/scr.rb', line 312

def each_model
  if block_given? then
    @num_models.times { |i|
      yield @models[i]
    }
  else
    to_enum(:each_model)
  end
end

#invalidate_layout ⇒ Object 



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# File 'lib/bayonetta/scr.rb', line 326

def invalidate_layout
  @offsets_models = []
  @offset_texture = 0
  @total_size = 0
  self
end

#push_model(file) ⇒ Object 



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# File 'lib/bayonetta/scr.rb', line 345

def push_model(file)
  invalidate_layout
  @models.push file
  @sizes_models.push file.size
  @num_models += 1
  self
end

#textures ⇒ Object 



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# File 'lib/bayonetta/scr.rb', line 360

def textures
  @textures
end

#textures=(file) ⇒ Object 



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# File 'lib/bayonetta/scr.rb', line 353

def textures=(file)
  invalidate_layout
  @textures = file
  @size_textures = file.size
  self
end