Howdy.
I’m working on getting Pbuffer support in my application. Basically I just need multiple render targets to do things like bloom, heat shimmer, etc…
As a first step, I was messing around with PbufferTest. However I noticed that when using render-to-texture mode, it seems to be kind of borked up. It is just rendering a white rectangle. Is this a known problem?
(please see attached screenshots)
Thanks!
[quote=“anarchotron,post:1,topic:24244”]
Don’t forget to try EXT_framebuffer_object.
[quote=“anarchotron,post:1,topic:24244”]
No, you should be seeing the same thing. Works fine here, so it must be something with your setup. LWJGL version, card model, driver version please?
You think that EXT_framebuffer_object is better to use than Pbuffer?
The versions I am using are
LWJGL 0.97.1
JDK 1.5.0_04
Radeon 9800 XT
driver CATALYST 5.7
Thanks!
Ok I see that EXT_framebuffer_object is intended as a complete replacement for pbuffer, so my question about it vs. pbuffer is answered.
Now to find some good sample code 
Although it uses PBuffers, you might find this useful anarchotron: http://www.funkapotamus.org/crssource.zip (Uses LWJGL .97)
This is a demo I made using PBuffers that does exactly what you want. The demo effect is more like a “watergun”, however, heat shimmers and bloom effects is right along the same line.
That looks awesome, thank you!
I did end up hooking up FBOs… it was pretty easy to write a wrapper class around the setup/bind/unbind/copy functionality of the FBO. I’ve got bloom working (still a bit of ugly banding I’m working on getting rid of), and I’m starting on the adaptive gamma technique mentioned in the Shader X3 book!
Biggest problem I had was finding out the hard way that my FBO textures were required to be power-of-two. Violating this requirement generates no error, but instead generated strange, and very slow, behavior that I spent quite a while trying to figure out
Can you post some sample code of your EXT_framebuffer_object LWJGL implementation ?