On Wed, 2006-10-18 at 12:29 +0100, Andy Little wrote:
"Timothy M. Shead" <tshead@k-3d.com> wrote in message news:1161054851.13317.27.camel@joe.k-3d.com...
I am trying to use GIL with the OpenEXR library, which uses half-precision floating-point channels:
I'm not sure if the following fits the bill , but it might provide some ideas.
(quan arithmetic_promote header is :
http://quan.cvs.sourceforge.net/quan/quan-trunk/quan/meta/arithmetic_promote...
Actually, you may have missed Lubomir's response to my message, which - in a nutshell - is to provide a specialization for conversion between the new and existing types: namespace gil { /// Defines conversion from 16-bit-floats to 8-bit-integers template<> inline bits8 _channel_convert<bits8>(half Value) { return bits8(Value * 255); } /// Defines conversion from 8-bit-integers to 16-bit-floats template<> inline half _channel_convert<half>(bits8 Value) { return half(Value) / 255.0; } } // namespace gil Cheers, Tim