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[d3d9] can you read/write to the same RTT in single shader pass?

Graphics and GPU Programming Programming

Started by AverageJoeSSU January 09, 2012 06:05 PM

1 comment, last by MJP 12 years, 3 months ago

564

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January 09, 2012 06:05 PM

i always thought this was forbidden, but a simple test i saw suggested otherwise....

get texture reference from RTT

set the texture and bind RTT to render.

I would think that this would totally blow up. no?

thoughts?

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887

January 09, 2012 06:21 PM

I'd assume you just get undefined behavior. It can fail horribly and very likely doesn't what you want to do. Just because it doesn't crash hard doesn't mean it's ok to do it.

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January 09, 2012 10:22 PM

No, it's not valid. If you turn on the debug output it will yell at you about it.

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