Re: [Openexr-devel] OpenEXR single scanline read

[Florian Kainz]

Charles Henrich wrote:
> 
> Im having a devil of a time reading a float exr that has a databox and display
> box aligned at -98,-98,2147,1652.
> 
> It dumps core in readPixels no matter what I try and do.
> 
> Something like this should work for reading a single scanline (exrY) out of
> the file yeah?
> 
>         float pixels[datawin.max.x-datawin.min.x+1];
> 
>         fbuf.insert(channelname,
>                     Imf::Slice(Imf::FLOAT, (char *)pixels-datawin.min.x,
>                           sizeof(float), 0));
> 
>         inputfile->setFrameBuffer(fbuf);
>         inputfile->readPixels(exrY);
> 
> The only thing I can figure is somehow the calculation is wrong for the buffer
> space?  Are there any other tools available that will read float images?

Try this:

        Imf::Slice(Imf::FLOAT, (char *)(pixels-datawin.min.x),

or this:

        Imf::Slice(Imf::FLOAT, (char *)pixels-datawin.min.x*sizeof(float),