Jump to content
  • Advertisement
  • entries
    1277
  • comments
    1746
  • views
    1149701

USE A MASK, GO TO JAIL

Sign in to follow this  
johnhattan

390 views

Aww crap, I surrender.

According to Slashdot, Apple owns U.S. Patent No. 5,379,129, which patents composting a source image to a destination using a mask image. This is an obvious and well-known technique, but Apple seems to think they invented it in 1992. Here's an example. This is the masked bitmap I use in Black Box Chess that shows up in the main game browser.You can clearly see that I'm violating all kinds of patents here.



Funny, I don't recall stealing it from Apple. IIRC, it was covered in one of Microsoft's old programming manuals on how to make a transparent blit.

Interestingly, the PNG folks are looking for examples of pre-existing mask/bitmap code to kill the patent. I honestly wish I had some of my old source code, because I had games from around 1991 that did this.
Sign in to follow this  


0 Comments


Recommended Comments

There are no comments to display.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Advertisement
×

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

GameDev.net is your game development community. Create an account for your GameDev Portfolio and participate in the largest developer community in the games industry.

Sign me up!