Class: UnicodePlot::AsciiCanvas

Inherits:
Canvas
  • Object
show all
Defined in:
lib/unicode_plot/ascii_canvas.rb

Constant Summary collapse

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_DECODE = 
[' ']
PIXEL_PER_CHAR = 
3

Constants included from StyledPrinter

StyledPrinter::COLOR_DECODE, StyledPrinter::COLOR_ENCODE, StyledPrinter::DISABLE_TEXT_STYLE, StyledPrinter::TEXT_COLORS

Instance Attribute Summary

Attributes inherited from Canvas

#height, #origin_x, #origin_y, #pixel_height, #pixel_width, #plot_height, #plot_width, #width, #x_pixel_per_char, #y_pixel_per_char

Instance Method Summary collapse

Methods inherited from Canvas

#char_at, #color_at, create, #index_at, #line!, #lines!, #point!, #points!, #print, #show

Methods included from BorderPrinter

#print_border_bottom, #print_border_top

Methods included from StyledPrinter

#color?, #print_color, #print_styled

Constructor Details

#initialize(width, height, **kw) ⇒ AsciiCanvas

Returns a new instance of AsciiCanvas.



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# File 'lib/unicode_plot/ascii_canvas.rb', line 106

def initialize(width, height, **kw)
  super(width, height,
        width * PIXEL_PER_CHAR,
        height * PIXEL_PER_CHAR,
        0,
        x_pixel_per_char: PIXEL_PER_CHAR,
        y_pixel_per_char: PIXEL_PER_CHAR,
        **kw)
end

Instance Method Details

#lookup_decode(code) ⇒ Object 



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# File 'lib/unicode_plot/ascii_canvas.rb', line 153

def lookup_decode(code)
  ASCII_DECODE[code]
end

#lookup_encode(x, y) ⇒ Object 



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# File 'lib/unicode_plot/ascii_canvas.rb', line 149

def lookup_encode(x, y)
  ASCII_SIGNS[x][y]
end

#pixel!(pixel_x, pixel_y, color) ⇒ Object 



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# File 'lib/unicode_plot/ascii_canvas.rb', line 116

def pixel!(pixel_x, pixel_y, color)
  unless 0 <= pixel_x && pixel_x <= pixel_width &&
         0 <= pixel_y && pixel_y <= pixel_height
    return color
  end
  pixel_x -= 1 unless pixel_x < pixel_width
  pixel_y -= 1 unless pixel_y < pixel_height

  tx = pixel_x.fdiv(pixel_width) * width
  char_x = tx.floor + 1
  char_x_off = pixel_x % PIXEL_PER_CHAR + 1
  char_x += 1 if char_x < tx.round + 1 && char_x_off == 1

  char_y = (pixel_y.fdiv(pixel_height) * height).floor + 1
  char_y_off = pixel_y % PIXEL_PER_CHAR + 1

  index = index_at(char_x - 1, char_y - 1)
  if index
    @grid[index] |= lookup_encode(char_x_off - 1, char_y_off - 1)
    @colors[index] |= COLOR_ENCODE[color]
  end
end

#print_row(out, row_index) ⇒ Object 



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# File 'lib/unicode_plot/ascii_canvas.rb', line 139

def print_row(out, row_index)
  unless 0 <= row_index && row_index < height
    raise ArgumentError, "row_index out of bounds"
  end
  y = row_index
  (0 ... width).each do |x|
    print_color(out, color_at(x, y), lookup_decode(char_at(x, y)))
  end
end