CSC151 2007S, Class 38: Storing Images as Simple Pixel Maps

Admin:
* Reading for Monday: Pixmaps, Revisited.
* Assignment for Tuesday: Assignment 13: Storing Object-Based Drawings.
* EMAIL ME WHEN THE DAMN LINKS DON'T WORK
* Our favorite activity: Ask Prospies stupid questions and hear stupid
  answers
  * Why are you visiting Grinnell?
    * See what the College is like
    * Is Iowa really as scary as it sounds?
    * 
  * Why might you worry about visiting Iowa?
    * It can be *very* cold
    * The dogs are really smart, and will shoot you if necessary
    * There's open space not filled by people
  * Why come to Grinnell or Iowa vs.
    * It's not only cold, it's cool
    * Everyone is nice in Iowa
    * Because they have really good donuts
    * Faculty wear giant Tigger suits WITH academic regalia
      * Disclaimer: Tigger is probably a registered trademark of
        a company represented by three circles.
    * Meet presidential candidates
    * Awesomely good sciences
    * And you can take stuff that's not science
    * Professors are accesible
Overview:
* Storing images.
* Storing colors.
* Storing images, revisited.

* Make sure you get through problem 4 on the files lab
* Lab

/Question/

* You have an image
* You want to write the code to save it to a file
* What might that code look like?
* What would help you write that code?
  * File operations:
    open-output-file
    write
    newline   
    close-output-port
  * Pixel operations
* Write each pixel to the file one by one

/Reflection/