Class: OnlyofficePdfParser::BmpImage

Inherits:
Object
  • Object
show all
Defined in:
lib/onlyoffice_pdf_parser/bmp_image.rb

Overview

class for storing bmp image pixels data

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(param = nil, width: nil, height: nil) ⇒ BmpImage

Returns a new instance of BmpImage.



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# File 'lib/onlyoffice_pdf_parser/bmp_image.rb', line 15

def initialize(param = nil, width: nil, height: nil)
  @width = width
  @height = height
  return unless param

  init_data(param)
  image_size = ImageSize.new(data).size

  @width = image_size.first
  @height = image_size.last
  fetch_pixels
end

Instance Attribute Details

#data ⇒ String (readonly)

Returns binary dat of file.

Returns:

  • (String) —

    binary dat of file



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# File 'lib/onlyoffice_pdf_parser/bmp_image.rb', line 13

def data
  @data
end

#height ⇒ Object

Returns the value of attribute height.



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# File 'lib/onlyoffice_pdf_parser/bmp_image.rb', line 11

def height
  @height
end

#path_to_image ⇒ Object

Returns the value of attribute path_to_image.



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# File 'lib/onlyoffice_pdf_parser/bmp_image.rb', line 11

def path_to_image
  @path_to_image
end

#pixels ⇒ Object

Returns the value of attribute pixels.



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# File 'lib/onlyoffice_pdf_parser/bmp_image.rb', line 11

def pixels
  @pixels
end

#width ⇒ Object

Returns the value of attribute width.



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# File 'lib/onlyoffice_pdf_parser/bmp_image.rb', line 11

def width
  @width
end

Instance Method Details

#==(other) ⇒ True, False

Compare object with other

Parameters:

  • other (Object) —

    object to compare

Returns:

  • (True, False) —

    result of comparison



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# File 'lib/onlyoffice_pdf_parser/bmp_image.rb', line 36

def ==(other)
  return false unless other.width == width && other.height == height

  pixels.each_with_index do |row, row_index|
    row.each_with_index do |pixel, pixel_index|
      other_pixel = other.pixels[row_index][pixel_index]
      result = (pixel == other_pixel)
      return false unless result
    end
  end
  true
end

#get_sub_image(start_point = CursorPoint.new(0, 0), width = 0, height = 0) ⇒ BmpImage

Get sub image from coordinates

Parameters:

  • start_point (CursorPoint) (defaults to: CursorPoint.new(0, 0)) —

    top left coordinates to get

  • width (Integer) (defaults to: 0) —

    width to get

  • height (Integer) (defaults to: 0) —

    height to get

Returns:



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# File 'lib/onlyoffice_pdf_parser/bmp_image.rb', line 54

def get_sub_image(start_point = CursorPoint.new(0, 0), width = 0, height = 0)
  sub_image = BmpImage.new(nil, width: width, height: height)
  pixels_array = []
  height.times do |current_height|
    line_array = []
    width.times do |current_width|
      pixel_line = pixels[start_point.top + current_height]
      # If pixels match to near to the edge of right border of image, then end
      return nil unless pixel_line

      line_array << pixel_line[start_point.left + current_width]
    end
    pixels_array << line_array
  end
  sub_image.pixels = pixels_array
  sub_image
end

#get_sub_image_array(path_to_sub_image) ⇒ Array<CursorPoint>

Get sub image from file pattern coordinates

Parameters:

  • path_to_sub_image (String) —

    path to pattern to find

Returns:



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# File 'lib/onlyoffice_pdf_parser/bmp_image.rb', line 75

def get_sub_image_array(path_to_sub_image)
  coordinates_array = []
  sub_image = BmpImage.new(path_to_sub_image)
  first_sub_image_line = sub_image.pixels.first
  pixels.each_with_index do |current_line, image_line_index|
    included_indexes = ArrayHelper.get_array_inclusion_indexes(current_line, first_sub_image_line)
    included_indexes.each do |current_included_index|
      coordinates = image_location_start_find(current_included_index, image_line_index)
      got_sub_image = get_sub_image(coordinates,
                                    sub_image.width,
                                    sub_image.height)
      coordinates_array << coordinates if got_sub_image == sub_image
    end
  end
  coordinates_array
end

#to_s ⇒ String

Returns convert object to string.

Returns:

  • (String) —

    convert object to string



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# File 'lib/onlyoffice_pdf_parser/bmp_image.rb', line 29

def to_s
  path_to_image
end