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require_relative 'lookup_canvas'
module UnicodePlot
class AsciiCanvas < LookupCanvas
Canvas::CANVAS_CLASS_MAP[:ascii] = self
ASCII_SIGNS = [
[ 0b100_000_000, 0b000_100_000, 0b000_000_100 ].freeze,
[ 0b010_000_000, 0b000_010_000, 0b000_000_010 ].freeze,
[ 0b001_000_000, 0b000_001_000, 0b000_000_001 ].freeze
].freeze
ASCII_LOOKUP = {
0b101_000_000 => '"',
0b111_111_111 => '@',
#0b011_110_011 => '$',
0b010_000_000 => '\'',
0b010_100_010 => '(',
0b010_001_010 => ')',
0b000_010_000 => '*',
0b010_111_010 => '+',
0b000_010_010 => ',',
0b000_100_100 => ',',
0b000_001_001 => ',',
0b000_111_000 => '-',
0b000_000_010 => '.',
0b000_000_100 => '.',
0b000_000_001 => '.',
0b001_010_100 => '/',
0b010_100_000 => '/',
0b001_010_110 => '/',
0b011_010_010 => '/',
0b001_010_010 => '/',
0b110_010_111 => '1',
#0b111_010_100 => '7',
0b010_000_010 => ':',
0b111_000_111 => '=',
#0b010_111_101 => 'A',
#0b011_100_011 => 'C',
#0b110_101_110 => 'D',
#0b111_110_100 => 'F',
#0b011_101_011 => 'G',
#0b101_111_101 => 'H',
0b111_010_111 => 'I',
#0b011_001_111 => 'J',
#0b101_110_101 => 'K',
0b100_100_111 => 'L',
#0b111_111_101 => 'M',
#0b101_101_101 => 'N',
#0b111_101_111 => 'O',
#0b111_111_100 => 'P',
0b111_010_010 => 'T',
#0b101_101_111 => 'U',
0b101_101_010 => 'V',
#0b101_111_111 => 'W',
0b101_010_101 => 'X',
0b101_010_010 => 'Y',
0b110_100_110 => '[',
0b010_001_000 => '\\',
0b100_010_001 => '\\',
0b110_010_010 => '\\',
0b100_010_011 => '\\',
0b100_010_010 => '\\',
0b011_001_011 => ']',
0b010_101_000 => '^',
0b000_000_111 => '_',
0b100_000_000 => '`',
#0b000_111_111 => 'a',
#0b100_111_111 => 'b',
#0b001_111_111 => 'd',
#0b001_111_010 => 'f',
#0b100_111_101 => 'h',
#0b100_101_101 => 'k',
0b110_010_011 => 'l',
#0b000_111_101 => 'n',
0b000_111_100 => 'r',
#0b000_101_111 => 'u',
0b000_101_010 => 'v',
0b011_110_011 => '{',
0b010_010_010 => '|',
0b100_100_100 => '|',
0b001_001_001 => '|',
0b110_011_110 => '}',
}.freeze
ascii_lookup_key_order = [
0x0002, 0x00d2, 0x0113, 0x00a0, 0x0088,
0x002a, 0x0100, 0x0197, 0x0012, 0x0193,
0x0092, 0x0082, 0x008a, 0x0054, 0x0004,
0x01d2, 0x01ff, 0x0124, 0x00a8, 0x0056,
0x0001, 0x01c7, 0x0052, 0x0080, 0x0009,
0x00cb, 0x0007, 0x003c, 0x0111, 0x0140,
0x0024, 0x0127, 0x0192, 0x0010, 0x019e,
0x01a6, 0x01d7, 0x0155, 0x00a2, 0x00ba,
0x0112, 0x0049, 0x00f3, 0x0152, 0x0038,
0x016a
]
ASCII_DECODE = [' ']
1.upto(0b111_111_111) do |i|
min_key = ascii_lookup_key_order.min_by {|k| (i ^ k).digits(2).sum }
ASCII_DECODE[i] = ASCII_LOOKUP[min_key]
end
ASCII_DECODE.freeze
PIXEL_PER_CHAR = 3
def initialize(width, height, **kw)
super(width, height,
PIXEL_PER_CHAR, PIXEL_PER_CHAR,
**kw)
end
def lookup_encode(x, y)
ASCII_SIGNS[x][y]
end
def lookup_decode(code)
ASCII_DECODE[code]
end
end
end
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