This program simulates a basic editor of bitmap images using capital letters to represent pixels.
Pixel co-ordinates are a pair of integers: a column number between 1 and 250, and a row number between 1 and 250.
Bitmaps starts at coordinates 1,1.
Colours are specified by capital letters.
To run the main program:
$ cd /path/to/bitmap_editor
$ ruby Main.rb
To run the specification tests using RSpec:
$ cd /path/to/bitmap_editor
$ rspec spec/*
To see the results of the unit tests:
$ cd /path/to/bitmap_editor
$ ruby Test.rb
There are 8 supported commands:
- I M N - Create a new M x N image with all pixels coloured white (O).
- C - Clears the table, setting all pixels to white (O).
- L X Y C - Colours the pixel (X,Y) with colour C.
- V X Y1 Y2 C - Draw a vertical segment of colour C in column X between rows Y1 and Y2 (inclusive).
- H X1 X2 Y C - Draw a horizontal segment of colour C in row Y between columns X1 and X2 (inclusive).
- S - Show the contents of the current image
- ? - Displays help text
- X - Terminate the session
In the example below, > represents input
> I 5 6
> L 2 3 A
> S
OOOOO
OOOOO
OAOOO
OOOOO
OOOOO
OOOOO
> V 2 3 6 W
> H 3 5 2 Z
> S
OOOOO
OOZZZ
OWOOO
OWOOO
OWOOO
OWOOO