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November 2009 - Posts

Wednesday, November 11, 2009 8:10 AM

Premultiplied alpha content processor

As mentioned in my previous post , a Content Processor that converts textures into premultiplied alpha format: using Microsoft.Xna.Framework; using Microsoft.Xna.Framework.Content.Pipeline; using Microsoft.Xna.Framework.Content.Pipeline.Graphics; using
Posted by ShawnHargreaves | 2 Comments
Tuesday, November 10, 2009 7:24 PM

Premultiplied alpha in XNA Game Studio

It is possible to use premultiplied alpha with XNA Game Studio, but the bad news is we don't do much to help you with it. Why not? Yeah .  Our bad.  In fact one of my biggest regrets about the design of the XNA Framework is that we didn't do
Posted by ShawnHargreaves | 3 Comments
Saturday, November 07, 2009 12:34 PM

Premultiplied alpha and image composition

From Wikipedia : "Alpha compositing is the process of combining an image with a background to create the appearance of partial transparency. It is often useful to render image elements in separate passes, and then combine the resulting multiple 2D
Posted by ShawnHargreaves | 3 Comments
Friday, November 06, 2009 11:39 AM

Premultiplied alpha

Remember when you first figured out Santa Claus wasn't real? The growing doubt, tempered by the fact that all your friends believed in him, and surely they can't ALL be wrong, then the gradual realization that everybody was in fact wrong... Well, I've
Posted by ShawnHargreaves | 4 Comments
Monday, November 02, 2009 7:21 AM

Texture filtering: alpha cutouts

Consider a cutout texture that contains a solid shape surrounded by transparency. Let's say this is a tree, although it could equally well be a cat or an overweight Italian plumber. Our tree is opaque and colored green: tree  =  (0, 255, 0,
Posted by ShawnHargreaves | 0 Comments
 
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