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8 bit render target

Started by Guoshima Apr 20, 2006 at 3:26 AM 1 replies 900+ views

Original Post

Apr 20, 2006 at 3:26 AM

Hello, I have a noob question, but can I create a 8 bit render target in DirectX. I tried to give D3DFMT_L8, but for some reason he can't create a render target from this. I presume it's because it's an unsigned format or something, but the great error reporting system of DirectX doesn't say anything interesting ... again. So is it possible, and what format do I need to use then ? (less than 8 bit is also oké, but this will be rather hard I suppose) Regards, Kenzo

Nik02

Apr 20, 2006 at 3:30 AM

You can't create a 8-bit render target, as today's hardware doesn't support those.

You can check for supported rt formats at runtime, by using the various device validation functions that D3D supports. This is a good practice in any case, even if you just run test programs on your own computer.

In practice, the hardware today doesn't like palettes at all, and 16-bit RGB (either 565 or 555x) is the lowest weight render target that you can create.

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