Re: [Openexr-devel] Saving an all black image

[John Cooper]

This doesn't appear to be a single-black-pixel problem because even if I
increase the data window to be 10 x 10 pixels or 100 x 100 pixels, it still
seems to produce an EXR file that our other in-house EXR reader can't read
in. If I set the data window to be the same as the display window, it seems
to be fine. It's only when they are different and the image data is all
zeros.

John Cooper
Commercials TD
Digital Domain

----- Original Message -----
From: "Florian Kainz" <address@hidden>
To: "John Cooper" <address@hidden>
Cc: <address@hidden>
Sent: Friday, May 28, 2004 2:57 PM
Subject: Re: [Openexr-devel] Saving an all black image


> John Cooper wrote:
> > Are there any known bugs with the EXR library when saving an image in
> > which all pixels are zero (black) and the data window is set to less
> > than the display window? I keep getting files with no scanline data even
> > though the header looks kosher (examined via exrheader). This is with
> > version 1.0.6 of the library, btw. I can't use any other version right
> > now because I do not have VC++ 7.1 installed on my machine (I am using
> > Intel's compiler which compiles my own code, but doesn't compile the EXR
> > library itself without errors) and so I am dependent on the precompiled
> > binaries that I have for 1.0.6.
> >
> > Thanks!
> > John Cooper
> > Commercials TD
> > Digital Domain
> >
>
> A while ago, someone reported a bug that caused problems saving
> a file that contained only a single black pixel.  The bug was fixed
> a while ago, but I can't remember in which version.
>
> Can you send me self-contained sample code that reproduces the problem?