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MohammadAhmed

high dynamic range rendering

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MohammadAhmed    279

hello , I am design game using XNA , I work on apply HDR rendering for my images , but the problem is I don't understand well the 

The LogLuv Encoding for Full Gamut  !! I take alot of math courses , but still bit confused ! so any prerequisite books for this title so that I can understand HDR for games !! 

I took digital image processing course :)

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Hodgman    51234

LogLuv encoding was popular many years ago, when support for floating-point textures on GPUs was rare and/or slow.

 

These days, it's better to not bother with fancy encodings like that, and instead just use a floating-point texture format, such as HalfVector4 (a.k.a. D3DFMT_A16B16G16R16F).

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swiftcoder    18432

[quote name='jeffkingdev' timestamp='1358523771' post='5022914']
Do most video cards these days support the floating point textures? Do the onboard cards do this now too?[/quote]

Even those god-awful Intel integrated chipsets have had floating point textures for a couple of generations now.

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CC Ricers    1491

As you're working with XNA, it's advisable to use the HdrBlendable surface format. It's a floating point format specifically made for HDR use, which uses 4 Half Vectors for GPUs on the PC. Just keep in mind its limitations, like not being able to use a linear texture filter for it.

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