Indigo Renderer Forum

it seems that copyHDRBuffer(float *buffer) will only work if copyBuffer(indUChar8 *buffer) was called before. otherwise it will result in an access violation.

can someone confirm, or is it even intended?

edit: also, this function is not documented

is there a special reason why the values are clamped to 1.0?

Crashing is never intended

what i actually meant is if its not intended to be used without copyBuffer().
feel free to answer my other question, too, ono

It should be able to be used independently of copyBuffer.

It shouldn't be clamped to 1.0.

I have a question about the image buffer too. Don't want to make a new thread about it so i ask it here (i hope you don't mind).
What are the max and min values of the pixel color channel when I use:

copyBuffer(buffer);
r = (float)((const char*)buffer)[(y*w + x)*3];

I mean what's the possible lowest and what's the highest value of r?
I'm experimenting with some image filters here and I'm offten geting very funky colors. So i'm thinking i have to clamp my color values, but i'm not sure what are the legal max and min for r,g,b inside the buffer. Cause it seems, that they are not 0-255. Or are they?

Yes, they're 0-255.
char can be signed, use unsigned char instead.

Thanks a million !
Unsigned char did the trick.