[Olena-patches] 2856: Add saving routine for floating-point value 2-complex images.

* mln/io/off/save.hh (io::off::save(const float_2complex_image3df&, const std::string&)): New function. (io::off::internal::float_off_saver): New functor. --- milena/ChangeLog | 9 ++++++++ milena/mln/io/off/save.hh | 51 +++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 60 insertions(+), 0 deletions(-) diff --git a/milena/ChangeLog b/milena/ChangeLog index 1a0b0a0..3706c51 100644 --- a/milena/ChangeLog +++ b/milena/ChangeLog @@ -1,5 +1,14 @@ 2008-11-12 Roland Levillain &lt;roland(a)lrde.epita.fr&gt; + Add a saving routine for floating-point value 2-complex images. + + * mln/io/off/save.hh + (io::off::save(const float_2complex_image3df&, const std::string&)): + New function. + (io::off::internal::float_off_saver): New functor. + +2008-11-12 Roland Levillain &lt;roland(a)lrde.epita.fr&gt; + Add a saving routine for int_u8 2-complex images. * mln/io/off/save.hh diff --git a/milena/mln/io/off/save.hh b/milena/mln/io/off/save.hh index 604281e..e6582cc 100644 --- a/milena/mln/io/off/save.hh +++ b/milena/mln/io/off/save.hh @@ -76,6 +76,17 @@ namespace mln void save(const int_u8_2complex_image3df& ima, const std::string& filename); + /** \brief Save a floating-point value grey-level OFF image into + a complex image. + + \param[in] ima The image to save. + \param[in] filename The name of the file where to save the image. + + Only data is attached to 2-faces is saved; the OFF file + cannot store data attached to faces of other dimensions. */ + void save(const float_2complex_image3df& ima, + const std::string& filename); + namespace internal { @@ -114,6 +125,17 @@ namespace mln void write_face_data(std::ostream& ostr, const value& v) const; }; + + /* FIXME: We should turn float_off_saver into a + float01_off_saver (see FIXME/comment in implementation + below). */ + struct float_off_saver + : public off_saver< float_2complex_image3df, float_off_saver > + { + /// \brief Save face data. + void write_face_data(std::ostream& ostr, const value& v) const; + }; + } // end of namespace mln::io::off::internal @@ -140,6 +162,14 @@ namespace mln trace::exiting("mln::io::off::save"); } + void + save(const float_2complex_image3df& ima, const std::string& filename) + { + trace::entering("mln::io::off::save"); + internal::float_off_saver()(ima, filename); + trace::exiting("mln::io::off::save"); + } + /*-------------------------. | Actual implementations. | @@ -348,6 +378,27 @@ namespace mln ostr << ' ' << v << ' ' << v << ' ' << v << ' ' << 1.0f << std::endl; } + + /* FIXME: We should turn float_off_saver into a + float01_off_saver to avoid the assertions below. */ + void + float_off_saver::write_face_data(std::ostream& ostr, + const value& v) const + { + /* Using RGBA colors to represent a floating-point value. + + Each channel (R, G, B) of the color V is a floating-point + number in the range 0..1. A fourth channel, A, controls + the transparency. + + We just set the same value for each channel, as the OFF + file format does not support gray-level values as + such. */ + mln_assertion(0.0f <= v); + mln_assertion(v <= 1.0f); + ostr << ' ' << v << ' ' << v << ' ' << v + << ' ' << 1.0f << std::endl; + } /* \} */ } // end of namespace mln::io::off::internal -- 1.6.0.1