32 bit integer single channel color buffer & FBO

OpenGL OpenGL: Advanced Coding
1

Hi

Is there a real chance that I would get a RenderBuffer of 32 bit integers? I use this as a ID buffer. A single channel buffer would simplify my code. 24 bit would be also ok but 16 bit is a little bit to few.

thanks and regards

Marco

2

Nope. The trend goes to floats.
For pixel IDs in a color buffer the usual method is to use an RGBA8 32 bit buffer and encode the number in the RGBA channels.
Make sure everything which could change the input color (lighting, blending, texturing, etc.) is off when rendering the IDs.

3

Originally posted by Relic:
Nope. The trend goes to floats.
For pixel IDs in a color buffer the usual method is to use an RGBA8 32 bit buffer and encode the number in the RGBA channels.
Make sure everything which could change the input color (lighting, blending, texturing, etc.) is off when rendering the IDs.
Thats what I now do. But how can I sure its robust?