Thanks for your answers.
Here is the export code i'm using. Almost a copy of the code
available in the documentation:
ImageOutput *out = ImageOutput::create (filename);
if (! out)
return false;
ImageSpec spec (width, height, nbchannels, TypeDesc::FLOAT);
out->open (filename, spec);
bool success = out->write_image (TypeDesc::FLOAT, buffer);
if( !success){
LOG_ERROR ("Could not write " << filename << ", error = " <<
out->geterror().c_str() << "\n");
}
out->close ();
delete out;
The buffer variable is a float buffer with RGBA data interlaced.
I've done more tests, with disturbing results. The file i've
attached can be read by imagemagick or read back by my application.
*Gimp says: " Sorry, can not handle image with 32 bits samples.
Unsupported layout, no RGBA loader".
*Gnome document viewer displays a black image with bits of color on
the top rows.
*Gnome image viewer shows nothing the first time, but when switch
back and forth it displays, randomly:
- nothing
- the correct image
- a part of the image
- a tiled version of the image in which the tiles position are random
( i can get half the cube on the left border, the other half on the
middle top for example.) As if data was not read sequencially.
So it seems the export is correct after all, but the application I
used to read the file were not. I need to check one last thing:
The tests i've performed today are on a Debian Wheezy. Yesterday I
worked on a CentOS 6.2, using the same binaries. (compiled on a
CentOS 5). Tried Gimp and gnome viewer, but not ImageMagick nor my
application. I need to check that to know if there is differences
between systems.
I'll check iconvert as you advised on monday, i don't have it here.
Thanks !
2012/10/12 Larry Gritz <[email protected] <mailto:[email protected]>>
Needless to say, if iconvert works, please feel free to post the
code surrounding the write_image call, maybe we can spot an error.
-- lg
On Oct 12, 2012, at 9:59 AM, Larry Gritz wrote:
> Are you able to write TIFF files with the utilities that come
with OIIO?
>
> iconvert foo.png foo.tif
>
> Does that give you a valid TIFF file? If so, the problem is
probably in the way you are calling write_image or somewhere else
in your program.
>
> -- lg
>
>
> On Oct 12, 2012, at 9:35 AM, Michel Lerenard wrote:
>
>> Hi everyone,
>>
>> Sorry to bother you with this issue but i don't find any
reason why it happens:
>> I can't write files in TIFF format. The same data is correctly
exported in several format (png, jpg, exr, etc...).
>> In TIFF, i get a blank (transparent) image.
>>
>> I only have this problem with linux. Windows version works
fine. I've tried using different version of the lib, it does not
work.
>> (i've tried 3.8.2, 3.9.4, 4.0.2)
>>
>> I can't find any reason why it doesn't work, i use a simple
ImageOutput::write_image() call.
>>
>> Do anyone have a clue about this kind of problem ?
>>
>> Thanks in advance.
>>
>>
>> Michel
>>
>> _______________________________________________
>> Oiio-dev mailing list
>> [email protected]
<mailto:[email protected]>
>> http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org
>
> --
> Larry Gritz
> [email protected] <mailto:[email protected]>
>
>
> _______________________________________________
> Oiio-dev mailing list
> [email protected]
<mailto:[email protected]>
> http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org
--
Larry Gritz
[email protected] <mailto:[email protected]>
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