Eloi, maybe you have to create new channel type which represents a fixed point value. A good starting point might be scoped_channel_value in channel.hpp. I'm thinking something like this: template< typename BaseChannelValue > class fixed_point { typedef fixed_point value_type; typedef value_type& reference; typedef value_type* pointer; typedef const value_type& const_reference; typedef const value_type* const_pointer; BOOST_STATIC_CONSTANT(bool, is_mutable=channel_traits<BaseChannelValue>::is_mutable); static value_type min_value() { return ; } static value_type max_value() { return ; } fixed_point() {} fixed_point(const fixed_point& c) : _value(c._value) {} fixed_point(BaseChannelValue val) : _value(val) {} fixed_point& operator++() { /*todo*/; return *this; } fixed_point& operator--() { /*todo*/; return *this; } fixed_point operator++(int) { fixed_point tmp=*this; this->operator++(); return tmp; } fixed_point operator--(int) { fixed_point tmp=*this; this->operator--(); return tmp; } template <typename Scalar2> fixed_point& operator+=(Scalar2 v) { /*todo*/; return *this; } template <typename Scalar2> fixed_point& operator-=(Scalar2 v) { /*todo*/; return *this; } template <typename Scalar2> fixed_point& operator*=(Scalar2 v) { /*todo*/; return *this; } template <typename Scalar2> fixed_point& operator/=(Scalar2 v) { /*todo*/; return *this; } fixed_point& operator=(BaseChannelValue v) { _value=v; return *this; } operator BaseChannelValue() const { return _value; } private: BaseChannelValue _value; }; Does that goes in your direction? Regards, Christian On Thu, Nov 26, 2009 at 5:24 AM, Eloi Du Bois wrote:

Hi,

I have a stream with 8.8 (16b) channels encoded with fixed point arithmetics (http://knol.google.com/k/anonymous/fixed-point-arithmetic/1b19ktdbl6g9q/2#) and I need to create a rgb16 view that can hold my image... I tried with interleaved_view but this makes wrong values. I don't know how to manage with this... How must be encoded the shorts in a rgb16_image_t ?

If anyone could help me, that would be great.

Thanks, Eloi.

_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users