Hi guys!
I started using glut (with VS 2008) mainly for 2D applications.
I only draw sprites and even experienced with buffer swapping.
Now I want to add some sprites with transparency, how can I convert an image to a file with 4 values (R,G,B and A)?
printscreen
paste in photoshop or other software
manage r g b a channels in photoshop
save as 32bit TGA file
Or you can try graphicsmagick/imagemagick for some quick command line work.
by manage you mean to add the alpha channel and then save it as a tga?