https://github.com/emancu/ruby-bitmap-editor

https://github.com/emancu/ruby-bitmap-editor

Last synced: 24 days ago
JSON representation

• Host: GitHub
• URL: https://github.com/emancu/ruby-bitmap-editor
• Owner: emancu
• Created: 2017-11-28T18:45:56.000Z (about 7 years ago)
• Default Branch: master
• Last Pushed: 2017-12-06T14:44:11.000Z (about 7 years ago)
• Last Synced: 2024-10-25T01:43:42.283Z (2 months ago)
• Language: Ruby
• Size: 17.6 KB
• Stars: 0
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

        
# Bitmap editor

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 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.

## Commands

There are 7 supported commands:

1. I M N - Create a new M x N image with all pixels coloured white (O).

2. C - Clears the table, setting all pixels to white (O).

3. L X Y C - Colours the pixel (X,Y) with colour C.

4. V X Y1 Y2 C - Draw a vertical segment of colour C in column X between rows Y1 and Y2 (inclusive).

5. H X1 X2 Y C - Draw a horizontal segment of colour C in row Y between columns X1 and X2 (inclusive).

6. S - Show the contents of the current image

7. F X Y C - Fill an area adjacent to the pixel (X,Y) with colour C.

## 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