Chessboard

In this activity you need to complete the function drawChessboard in the provided program.

Download chessboard.c, or copy it into your current directory on a CSE system by running

$ cp /web/cs1511/17s2/week06/files/chessboard.c .

You are provided with the following representation of a pixel:

typedef struct _pixel {
    unsigned char red;
    unsigned char green;
    unsigned char blue;
} pixel;

You need to complete the drawChessboard function so that it fills in its given 2-dimensional pixel buffer with a chessboard image of 8 columns and 8 rows with alternating white and black squares and a white square in the top left corner.

Your image should look identical to this one

Remember, the pixel buffer is used pixels[y][x], with rows first. The bottom-left corner of the image is the start of the pixels and corresponds with pixels[0][0].

The program will send the data for the image to the screen output. To send it into a file instead run it using the following commands:

$ dcc -o chessboard chessboard.c
$ ./chessboard > chessboard.bmp
$ eog chessboard.bmp

To run some simple automated tests:

$ 1511 autotest chessboard

To run Styl-o-matic:

$ 1511 stylomatic chessboard.c
Looks good!

You’ll get advice if you need to make changes to your code.

Submit your work with the give command, like so:

$ give cs1511 wk06_chessboard

Or, if you are working from home, upload the relevant file(s) to the wk06_chessboard activity on Give Online.