Class: SwfRuby::Swf::Tag

Inherits:
Object
  • Object
show all
Defined in:
lib/swf_ruby/swf/tag.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(swf) ⇒ Tag

Returns a new instance of Tag.



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# File 'lib/swf_ruby/swf/tag.rb', line 17

def initialize(swf)
  swf.force_encoding("ASCII-8BIT") if swf.respond_to? :force_encoding
  record_header = swf[0, 2].unpack("v").first
  # tag type
  @code = (record_header >> 6) & 1023
  # tag length (including record header)
  @length = record_header & 63
  @long_header = false
  @data = nil
  if @length == 63
    len = swf[2, 4].unpack("i").first
    @data = swf[6, len]
    @length = len + 6
    @long_header = true
  else
    @data = swf[2, @length]
    @length += 2
  end
  @character_id = nil
  if self.define_tag?
    @character_id = @data[0, 2].unpack("v").first
  end
  @refer_character_id = nil
  @refer_character_id_offset = nil
  @refer_character_inst_name = nil
  data_offset = @long_header ? 6 : 2
  case Swf::TAG_TYPE[@code]
  when "PlaceObject"
    @refer_character_id_offset = data_offset
    @refer_character_id = @data[0, 2].unpack("v").first
  when "PlaceObject2"
    flags = @data[0, 1].unpack("C").first
    offset = 3
    if flags & 2 == 2
      @refer_character_id_offset = data_offset + offset
      @refer_character_id = @data[offset, 2].unpack("v").first
      offset += 2
    end
    if flags & 32 == 32
      if flags & 4 == 4
        matrix = SwfRuby::Swf::Matrix.new(@data[offset..-1])
        offset += matrix.length
      end
      if flags & 8 == 8
        cxtfm = SwfRuby::Swf::Cxformwithalpha.new(@data[offset..-1])
        offset += cxtfm.length
      end
      offset += 2 if flags & 16 == 16
      @refer_character_inst_name = SwfRuby::Swf::SwfString.new(@data[offset..-1]).string
    end
  when "PlaceObject3"
    flags = @data[0, 2].unpack("n").first
    offset = 4
    if flags & 8 == 8
      class_name = SwfRuby::Swf::SwfString.new(@data[offset..-1])
      offset += class_name.length
    end
    if flags & 512 == 512
      @refer_character_id_offset = data_offset + offset
      @refer_character_id = @data[offset, 2].unpack("v").first
    end
    if flags & 8192 == 8192
      if flags & 1024 == 1024
        matrix = SwfRuby::Swf::Matrix.new(@data[offset..-1])
        offset += matrix.length
      end
      if flags & 2048 == 2048
        cxtfm = SwfRuby::Swf::Cxformwithalpha.new(@data[offset..-1])
        offset += cxtfm.length
      end
      offset += 2 if flags & 4096 == 4096
      @refer_character_inst_name = SwfRuby::Swf::SwfString.new(@data[offset..-1]).string
    end
  when "RemoveObject"
    @refer_character_id_offset = data_offset
    @refer_character_id = @data[0, 2].unpack("v").first
  when "DefineShape"
  when "DefineShape2"
  when "DefineShape3"
    version = Swf::TAG_TYPE[@code][-1].to_i
    version = 1 if version == 0
    @refer_bitmap_offsets_to_ids = {}
    rect = SwfRuby::Swf::Rectangle.new(@data[2..-1])
    offset = 2+rect.length
    shapewithstyle = SwfRuby::Swf::Shapewithstyle.new(@data[offset..-1], version)
    shapewithstyle.fill_styles_with_offset.each do |fs_offset, fs|
      if fs.bitmap_id
        o = offset + fs_offset + fs.bitmap_id_offset
        o += @long_header ? 6 : 2
        @refer_bitmap_offsets_to_ids[o] = fs.bitmap_id
      end
    end
  when "DefineShape4"
    version = 4
    @refer_bitmap_offsets_to_ids = {}
    shape_rect = SwfRuby::Swf::Rectangle.new(@data[2..-1])
    offset = 2+shape_rect.length
    edge_rect = SwfRuby::Swf::Rectangle.new(@data[offset..-1])
    offset += edge_rect.length
    offset += 1
    shapewithstyle = SwfRuby::Swf::Shapewithstyle.new(@data[offset..-1], version)
    shapewithstyle.fill_styles_with_offset.each do |fs_offset, fs|
      if fs.bitmap_id
        o = offset + fs_offset + fs.bitmap_id_offset
        o += @long_header ? 6 : 2
        @refer_bitmap_offsets_to_ids[o] = fs.bitmap_id
      end
    end
  else 
    # do nothing.
  end
  @rawdata = swf[0, @length]
  self
end

Instance Attribute Details

#character_id ⇒ Object (readonly)

Returns the value of attribute character_id.



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# File 'lib/swf_ruby/swf/tag.rb', line 11

def character_id
  @character_id
end

#code ⇒ Object (readonly)

Returns the value of attribute code.



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# File 'lib/swf_ruby/swf/tag.rb', line 7

def code
  @code
end

#data ⇒ Object (readonly)

Returns the value of attribute data.



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# File 'lib/swf_ruby/swf/tag.rb', line 10

def data
  @data
end

#length ⇒ Object (readonly)

Returns the value of attribute length.



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# File 'lib/swf_ruby/swf/tag.rb', line 8

def length
  @length
end

#long_header ⇒ Object (readonly)

Returns the value of attribute long_header.



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# File 'lib/swf_ruby/swf/tag.rb', line 9

def long_header
  @long_header
end

#rawdata ⇒ Object (readonly)

Returns the value of attribute rawdata.



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# File 'lib/swf_ruby/swf/tag.rb', line 6

def rawdata
  @rawdata
end

#refer_bitmap_offsets_to_ids ⇒ Object (readonly)

Returns the value of attribute refer_bitmap_offsets_to_ids.



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# File 'lib/swf_ruby/swf/tag.rb', line 15

def refer_bitmap_offsets_to_ids
  @refer_bitmap_offsets_to_ids
end

#refer_character_id ⇒ Object (readonly)

Returns the value of attribute refer_character_id.



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# File 'lib/swf_ruby/swf/tag.rb', line 12

def refer_character_id
  @refer_character_id
end

#refer_character_id_offset ⇒ Object (readonly)

Returns the value of attribute refer_character_id_offset.



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# File 'lib/swf_ruby/swf/tag.rb', line 13

def refer_character_id_offset
  @refer_character_id_offset
end

#refer_character_inst_name ⇒ Object (readonly)

Returns the value of attribute refer_character_inst_name.



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# File 'lib/swf_ruby/swf/tag.rb', line 14

def refer_character_inst_name
  @refer_character_inst_name
end

Instance Method Details

#define_tag? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/swf_ruby/swf/tag.rb', line 150

def define_tag?
  Swf::TAG_TYPE[@code] =~ /^Define/
end

#rawdata_with_define_character_id(idmap, character_id) ⇒ Object

Define系タグの冒頭のcharacter_id参照を指定のIDに書き換える. 内部にBitmapIDの参照を含む場合、渡されたidmapから読み替える値を参照し、書き換える.



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# File 'lib/swf_ruby/swf/tag.rb', line 134

def rawdata_with_define_character_id(idmap, character_id)
  if self.define_tag?
    offset = @long_header ? 6 : 2
    @rawdata[offset, 2] = [character_id].pack("v")
    @refer_bitmap_offsets_to_ids.each do |bitmap_id_offset, bitmap_id|
      @rawdata[bitmap_id_offset, 2] = [idmap[bitmap_id]].pack("v")
    end if @refer_bitmap_offsets_to_ids
  end
  @rawdata
end

#rawdata_with_refer_character_id(character_id) ⇒ Object 



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# File 'lib/swf_ruby/swf/tag.rb', line 145

def rawdata_with_refer_character_id(character_id)
  @rawdata[@refer_character_id_offset, 2] = [character_id].pack("v") if @refer_character_id_offset
  @rawdata
end