Re: [Mesa3d-users] Problem with partial transparency and tga image

[Brian P. <br...@tu...>]

Kevin Vaughan wrote:
> I am have a problem with the transparency of my
> texture. In my program, I am mapping a background
> texture(bmp), then placing icons (tga) on top of this
> background. The tga icon images have transparent
> backgrounds (RGBA), however, when they are placed on
> top of the background texture, what ever color is
> selected fills the background. Therefore, insted of
> the underlying texture, I am seeing the selected
> color. I have attempted alpha tests, glblend,
> popattributes, and much more. The furthest I have
> gotten is when I change the color to
> color4f(0.0,0.0,0.0,0.1) after the glblend. This gives
> me complete transparency of my background, however,
> also enables some transparency of my actual icon as
> well. If any one has run into this situation before, I
> would greatly appreciate the help.

Hard to say what the problem is.  If you look at the
demos/fire.c program, it uses RGBA textures with alpha
testing to draw the trees.

If you've got code, I could take a quick look at it.

-Brian