Class: GBTiles::GBR::TileSet::Objects::TileData

Inherits:
GBTiles::GBR::TileSet::Object show all
Defined in:
lib/gbtiles/gbr/tile_set/objects/tile_data.rb

Instance Attribute Summary collapse

Attributes inherited from GBTiles::GBR::TileSet::Object

#object_id, #object_type

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ TileData

Returns a new instance of TileData.



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# File 'lib/gbtiles/gbr/tile_set/objects/tile_data.rb', line 14

def initialize
  super GBTiles::GBR::TileSet::OBJECT_TYPE[:tile_data]
end

Instance Attribute Details

#color_set ⇒ Object

Returns the value of attribute color_set.



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# File 'lib/gbtiles/gbr/tile_set/objects/tile_data.rb', line 11

def color_set
  @color_set
end

#count ⇒ Object

Returns the value of attribute count.



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# File 'lib/gbtiles/gbr/tile_set/objects/tile_data.rb', line 10

def count
  @count
end

#data ⇒ Object

Returns the value of attribute data.



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# File 'lib/gbtiles/gbr/tile_set/objects/tile_data.rb', line 12

def data
  @data
end

#height ⇒ Object

Returns the value of attribute height.



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# File 'lib/gbtiles/gbr/tile_set/objects/tile_data.rb', line 9

def height
  @height
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/gbtiles/gbr/tile_set/objects/tile_data.rb', line 7

def name
  @name
end

#width ⇒ Object

Returns the value of attribute width.



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# File 'lib/gbtiles/gbr/tile_set/objects/tile_data.rb', line 8

def width
  @width
end

Class Method Details

.initFromBitString(src) ⇒ Object 



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# File 'lib/gbtiles/gbr/tile_set/objects/tile_data.rb', line 18

def self.initFromBitString src
  object = GBTiles::GBR::TileSet::Objects::TileData.new

  object.name       = GBTiles::DataType.string!(src, 30)
  object.width      = GBTiles::DataType.word!(src)
  object.height     = GBTiles::DataType.word!(src)
  object.count      = GBTiles::DataType.word!(src)
  object.color_set  = src.slice!(0, 4)
  object.data       = src

  object
end

Instance Method Details

#render_tile(tile_index) ⇒ Object 



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# File 'lib/gbtiles/gbr/tile_set/objects/tile_data.rb', line 31

def render_tile tile_index
  tile = []

  tile_data = @data.slice(
    tile_index * @width * @height,
    @width * @height
  )

  (1..@height).each do |row|
    byte_0 = 0x00
    byte_1 = 0x00

    bitmask = 0x80

    (1..@width).each do |col|
      pixel = tile_data[(row - 1) * @height + col - 1]

      case pixel.unpack("C")[0]
      when 0 # Black
      when 1 # Dark Grey
        byte_0 |= bitmask
      when 2 # Light Grey
        byte_1 |= bitmask
      when 3 # White
        byte_0 |= bitmask
        byte_1 |= bitmask
      end

      bitmask >>= 1
    end

    tile << sprintf("0x%02x,0x%02x", byte_0, byte_1)
  end

  tile.join(",")
end