Class: RubyMarks::ImageUtils

Inherits:
Object
  • Object
show all
Defined in:
lib/ruby_marks/image_utils.rb

Class Method Summary collapse

Class Method Details

.calc_height(y1, y2) ⇒ Object 



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# File 'lib/ruby_marks/image_utils.rb', line 11

def self.calc_height(y1, y2)
  y2.to_i - y1.to_i + 1
end

.calc_middle_horizontal(x, width) ⇒ Object 



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# File 'lib/ruby_marks/image_utils.rb', line 16

def self.calc_middle_horizontal(x, width)
  x.to_i + width.to_i / 2
end

.calc_middle_vertical(y, height) ⇒ Object 



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# File 'lib/ruby_marks/image_utils.rb', line 21

def self.calc_middle_vertical(y, height)
  y.to_i + height.to_i / 2
end

.calc_width(x1, x2) ⇒ Object 



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# File 'lib/ruby_marks/image_utils.rb', line 6

def self.calc_width(x1, x2)
  x2.to_i - x1.to_i + 1
end

.export_file_to_str(file) ⇒ Object 



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# File 'lib/ruby_marks/image_utils.rb', line 129

def self.export_file_to_str(file)
  image = file.export_pixels_to_str
  image = image.gsub!(Regexp.new('\xFF\xFF\xFF', nil, 'n'), " ,") if image
  image = image.gsub!(Regexp.new('\x00\x00\x00', nil, 'n'), ".,") if image
  image = image.split(',') if image
  image = image.each_slice(file.page.width).to_a  if image 
end

.flood_scan(image, x, y, character = " ", coordinates = {}) ⇒ Object 



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# File 'lib/ruby_marks/image_utils.rb', line 36

def self.flood_scan(image, x, y, character=" ", coordinates={})
  coordinates = {x1: 0, y1: 0, x2: image[0].size, y2: image.size} unless coordinates.any?
  result_mask =  Hash.new { |hash, key| hash[key] = [] }
  result_mask.tap do |result_mask|
    process_queue =  Hash.new { |hash, key| hash[key] = [] }
    process_line = true
    
    loop do

      break if y > coordinates[:y2] - 1 || y < coordinates[:y1]
      reset_process = false

      if process_line
        current_x = x
        loop do
          position = image[y][current_x]
          
          break if position != character || current_x - 1 <= coordinates[:x1]         
          process_queue[y] << current_x unless process_queue[y].include?(current_x) || result_mask[y].include?(current_x) 
          result_mask[y] << current_x unless result_mask[y].include?(current_x)            
          current_x = current_x - 1
        end

        current_x = x.to_i
        loop do
          position = image[y][current_x]

          break if position != character || current_x + 1 >= coordinates[:x2]       
          process_queue[y] << current_x unless process_queue[y].include?(current_x) || result_mask[y].include?(current_x)              
          result_mask[y] << current_x unless result_mask[y].include?(current_x)
          current_x = current_x + 1
        end

        result_mask[y] = result_mask[y].sort
        process_queue[y] = process_queue[y].sort
      end

      process_line = true

      process_queue[y].each do |element|
        if y - 1 >= coordinates[:y1]
          position = image[y-1][element]

          if position == character && !result_mask[y-1].include?(element)
            x = element
            y = y - 1
            reset_process = true
            break
          end
        end
      end

      next if reset_process

      process_queue[y].each do |element|         
        if y + 1 <= coordinates[:y2]
          position = image[y+1] && image[y+1][element]

          if position && position == character && !result_mask[y+1].include?(element)
            x = element
            y = y + 1
            reset_process = true
            break
          else
            process_queue[y].delete(element)
          end
                
        end
      end

      next if reset_process

      process_queue.each do |k,v|
        process_queue.delete(k) if v.empty?
      end

      break if process_queue.empty?

      process_line = false
      y = process_queue.first[0] if process_queue.first.is_a?(Array)
    end
  end
end

.image_center(coordinates) ⇒ Object 



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# File 'lib/ruby_marks/image_utils.rb', line 26

def self.image_center(coordinates)
  width  = self.calc_width(coordinates[:x1], coordinates[:x2])
  height = self.calc_height(coordinates[:y1], coordinates[:y2])
  
  x = self.calc_middle_horizontal(coordinates[:x1], width)
  y = self.calc_middle_vertical(coordinates[:y1], height)
  return {x: x, y: y}
end

.to_hex(red, green, blue) ⇒ Object 



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# File 'lib/ruby_marks/image_utils.rb', line 121

def self.to_hex(red, green, blue)
  red = get_hex_from_color(red)
  green = get_hex_from_color(green)
  blue = get_hex_from_color(blue)
  "##{red}#{green}#{blue}".upcase
end