class UnicodePlot::LookupCanvas
Public Class Methods
new(width, height, x_pixel_per_char, y_pixel_per_char, fill_char=0, **kw)
click to toggle source
Calls superclass method
UnicodePlot::Canvas::new
# File lib/unicode_plot/canvas/lookup_canvas.rb, line 3 def initialize(width, height, x_pixel_per_char, y_pixel_per_char, fill_char=0, **kw) super(width, height, width * x_pixel_per_char, height * y_pixel_per_char, fill_char, x_pixel_per_char: x_pixel_per_char, y_pixel_per_char: y_pixel_per_char, **kw) end
Public Instance Methods
pixel!(pixel_x, pixel_y, color)
click to toggle source
# File lib/unicode_plot/canvas/lookup_canvas.rb, line 13 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 % x_pixel_per_char + 1 char_x += 1 if char_x < tx.round + 1 && char_x_off == 1 char_y_off = pixel_y % y_pixel_per_char + 1 char_y = ((pixel_y - (char_y_off - 1)) / 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)
click to toggle source
# File lib/unicode_plot/canvas/lookup_canvas.rb, line 36 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