Bob Friesenhahn bfrie...@simple.dallas.tx.us schrieb:
Likewise, GraphicsMagick includes work by Richard Nolde which knows
how to handle 16 and 24 bit floats. He actually wrote a full
conversion suite between 16, 24, 32, and 64-bit floats. I only
incorporated the specific functions that
mm == marti maria marti.ma...@littlecms.com writes:
mm Thanks everybody for your contribution. I'm right now working with
mm Bob's approach because:
I don't have time right now for anything lengthy, but having been
reminded that lcms and gm are both mit, I agree that the code used
in gm is the
The ieeehalfprecision.c file from the matlab package covers all possible
half values quickly and efficiently, using only type punning to integers,
bit comparisons ( and the like) and bit shifts. The licence is BSD and
the api is super simple:
int singles2halfp(void *target, void *source, int
Likewise, GraphicsMagick includes work by Richard Nolde which knows
how to handle 16 and 24 bit floats. He actually wrote a full
conversion suite between 16, 24, 32, and 64-bit floats. I only
incorporated the specific functions that GraphicsMagick needs. This
code has been in GraphicsMagick
On Sunday 15 August 2010 Aug, marti.ma...@littlecms.com wrote:
Quoting Kai-Uwe Behrmann k...@gmx.de:
Grepping the sources did not show a cmsFloat16Number type. Am I right in
that Half is currently not supported by lcms?
Right, still not supported but there are plans to provide formatters
Am 31.05.12, 12:16 +0200 schrieb Boudewijn Rempt:
On Sunday 15 August 2010 Aug, marti.ma...@littlecms.com wrote:
Quoting Kai-Uwe Behrmann k...@gmx.de:
Grepping the sources did not show a cmsFloat16Number type. Am I right in
that Half is currently not supported by lcms?
Right, still not
Hi Boudewijn,
It would be certainly easy to support that by writting a plug-in.
Regards
Marti
Boudewijn Rempt b...@valdyas.org escribió:
On Sunday 15 August 2010 Aug, marti.ma...@littlecms.com wrote:
Quoting Kai-Uwe Behrmann k...@gmx.de:
Grepping the sources did not show a
On 31/05/2012 15:02, Bob Friesenhahn wrote:
The challenge with Half is finding portable C code to convert to and
from Half. There is contributed code in GraphicsMagick for this (and
also 24-bit floats) but it may not be entirely error-free or suitably
fast.
I forwarded this link to Marti
Thanks Robin,
I have an implementation based on tables I did time ago. It is based
on a paper from a conference I attendend time ago...I don't remember
exactly. Sorry, I have to double check the origin.
But the file you suggest seems also very good. In fact the conversion
seems simple if
Am 31.05.12, 21:24 +0200 schrieb marti.ma...@littlecms.com:
Ok, the table-based implementation is neat but takes some memory, 2048
32bit words for mantissa table and there are other additional tables
as well.
I can include that in the lcms foundation, or pack it as a plug-in.
The plug-in
On Thursday 31 May 2012 May, marti.ma...@littlecms.com wrote:
Thanks Robin,
I have an implementation based on tables I did time ago. It is based
on a paper from a conference I attendend time ago...I don't remember
exactly. Sorry, I have to double check the origin.
But the file you
On Thu, 31 May 2012, Boudewijn Rempt wrote:
As an application developer, I'm totally fine with the packaged
plugin approach, if distributions will package it. I can live both
with the extra call and the extra memory requirement -- and I
totally understand not wanting to burden every user
On Sun, 15 Aug 2010, Kai-Uwe Behrmann wrote:
Grepping the sources did not show a cmsFloat16Number type. Am I right in
that Half is currently not supported by lcms?
Half support is quite challenging since there very little free sofware
which supports converting to and from Half. OpenEXR is
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