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View Full Version : FBO Bug ? (fragment discarded)



divide
05-29-2005, 06:25 AM
FBO purely discard fragment shaders under some conditions... download this test:
http://www.divideconcept.net/misc/fbo-bug.zip
And read "FBO BUG README.txt" inside the zip.. the problem comes from the shader file "frontfrag.txt".

Any tip ? What's happening ?

This bug is happening with all the latest Nvidia drivers I've tested (76.44,76.50,76.91) and my graphic card is a geforce fx 5200

Relic
05-30-2005, 05:03 AM
Tip: Add glGetError calls!
The program throws multiple errors due to glUniform called while no program is current and as a consequence all texture samplers point to unit 0 and throw some more errors.

divide
05-30-2005, 06:47 AM
Man I love you !
You're right my uniform calls were placed before programs were actually selected, forgot this could be a problem. Now everything works as planned.
But tell me, how have you detected theses calls ?

Java Cool Dude
05-30-2005, 09:22 AM
GLIntercept perhaps? :D

divide
05-30-2005, 11:31 AM
Wow, just discovered that GLIntercept, powerful !