sarslanoglu/sarslan-bitmap

🖼️ Simple bitmap editor written in Ruby

Install

Clone the repository

git clone git@github.com:sarslanoglu/sarslan-bitmap.git
cd sarslan-bitmap

Check your Ruby version

ruby -v

The ouput should be ruby 3.0.0

If not, install the right ruby version using rvm (it could take a while):

rvm install 3.0.0

Install dependencies

Using Bundler:

bundle install

To run script

ruby execute.rb

Testing

For rubocop to run

rubocop

For rspec to run

Rake

After running rspec coverage file will be created locally. To open coverage file just type

open coverage/index.html

to the terminal and hit enter. New browser tab will be open.

Instructions

Produce a Ruby program that simulates a basic interactive bitmap editor. Bitmaps are represented as an M x N matrix of pixels with each element representing a colour.

Program input

The input consists of a file containing a sequence of commands, where a command is represented by a single capital letter at the beginning of the line. Parameters of the command are separated by white spaces and they follow the command character. Pixel coordinates 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.

Commands

There are 6 supported commands: ● I N M - 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

Example

To run the application you must supply a command file like so bin/bitmap_editor examples/show.txt Input File:

I 5 6 L 1 3 A V 2 3 6 W H 3 5 2 Z S

Expected Output: OOOOO OOZZZ AWOOO OWOOO OWOOO OWOOO