[Olena-patches] [PATCH 01/10] Add a load routine for color (RGB) OFF (surface mesh) files.

* mln/io/off/load.hh (mln::io::off::load(rgb8_2complex_image3df, const std::string&)): New function. (mln::io::off::internal::rgb8_off_loader): New class. --- milena/ChangeLog | 9 +++++ milena/mln/io/off/load.hh | 84 ++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 92 insertions(+), 1 deletions(-) diff --git a/milena/ChangeLog b/milena/ChangeLog index 3fc4587..423ebb4 100644 --- a/milena/ChangeLog +++ b/milena/ChangeLog @@ -1,3 +1,12 @@ +2009-04-06 Roland Levillain &lt;roland(a)lrde.epita.fr&gt; + + Add a load routine for color (RGB) OFF (surface mesh) files. + + * mln/io/off/load.hh + (mln::io::off::load(rgb8_2complex_image3df, const std::string&)): + New function. + (mln::io::off::internal::rgb8_off_loader): New class. + 2009-04-03 Fabien Freling &lt;fabien.freling(a)lrde.epita.fr&gt; Add optional paramater for plot::save(). diff --git a/milena/mln/io/off/load.hh b/milena/mln/io/off/load.hh index 03fc3f3..1f8fefe 100644 --- a/milena/mln/io/off/load.hh +++ b/milena/mln/io/off/load.hh @@ -1,4 +1,4 @@ -// Copyright (C) 2008 EPITA Research and Development Laboratory (LRDE) +// Copyright (C) 2008, 2009 EPITA Research and Development Laboratory (LRDE) // // This file is part of the Olena Library. This library is free // software; you can redistribute it and/or modify it under the terms @@ -41,6 +41,8 @@ # include <string> +# include <mln/literal/black.hh> + # include <mln/core/concept/object.hh> # include <mln/core/alias/complex_image.hh> @@ -63,6 +65,9 @@ namespace mln existence of faces. */ void load(bin_2complex_image3df& ima, const std::string& filename); + // FIXME: Implement a load routine for for + // int_u8_2complex_image3df. + /** Load a floating-point OFF image into a complex image. \param[out] ima A reference to the image to construct. @@ -72,6 +77,15 @@ namespace mln 1-faces and 0-faces are set to 0.0f. */ void load(float_2complex_image3df& ima, const std::string& filename); + /** Load a 3x8-bit RGB (color) OFF image into a complex image. + + \param[out] ima A reference to the image to construct. + \param[in] filename The name of the file to load. + + Read floating-point data is attached to 2-faces only; + 1-faces and 0-faces are set to 0.0f. */ + void load(rgb8_2complex_image3df& ima, const std::string& filename); + namespace internal { @@ -118,6 +132,10 @@ namespace mln }; + /* Factor float_off_loader::reserve and rgb8_off_loader::reserve + and float_off_loader::assign and rgb8_off_loader::assign + by introducing an intermediate class. */ + struct float_off_loader : public off_loader< float_2complex_image3df, float_off_loader > { @@ -134,6 +152,23 @@ namespace mln std::vector<float> face_value; }; + + struct rgb8_off_loader + : public off_loader< rgb8_2complex_image3df, rgb8_off_loader > + { + /// Read face data. + void read_face_data(std::istream& istr); + + /// Pre-allocate data. + void reserve(unsigned nvertices, unsigned nedges, unsigned nfaces); + + /// Assign values to image. + void assign(values& vs, const domain& s); + + /// 2-face floating-point values. + std::vector<value::rgb8> face_value; + }; + } // end of namespace mln::io::off::internal @@ -160,6 +195,15 @@ namespace mln trace::exiting("mln::io::off::load"); } + void + load(rgb8_2complex_image3df& ima, const std::string& filename) + { + trace::entering("mln::io::off::load"); + internal::rgb8_off_loader()(ima, filename); + trace::exiting("mln::io::off::load"); + } + + /*-------------------------. | Actual implementations. | @@ -485,6 +529,25 @@ namespace mln mln_assertion(0.0f <= a); mln_assertion(a <= 1.0f); face_value.push_back(r); } + + void + rgb8_off_loader::read_face_data(std::istream& istr) + { + /* We just use R, G, and B and ignore A (transparency) when + considering the value (``color'') associated to a face. + + R must (and G, B and A should) be floating-point values + between 0 and 1, according to the OFF file format + definition. */ + // FIXME: `A' should be optional. + float r, g, b, a; + istr >> r >> g >> b >> a; + mln_assertion(0.0f <= r); mln_assertion(r <= 1.0f); + mln_assertion(0.0f <= g); mln_assertion(g <= 1.0f); + mln_assertion(0.0f <= b); mln_assertion(b <= 1.0f); + mln_assertion(0.0f <= a); mln_assertion(a <= 1.0f); + face_value.push_back(value::rgb8(r, g, b)); + } /* \} */ @@ -506,6 +569,15 @@ namespace mln void + rgb8_off_loader::reserve(unsigned /* nvertices */, + unsigned /* nedges */, + unsigned nfaces) + { + face_value.reserve(nfaces); + } + + + void bin_off_loader::assign(values& vs, const domain& s) { // Default values. @@ -523,6 +595,16 @@ namespace mln vs[D] = face_value; } + void + rgb8_off_loader::assign(values& vs, const domain& s) + { + // Default values for n-face with n in [0, D[. + for (unsigned i = 0; i < D; ++i) + vs[i].insert(vs[i].begin(), s.cplx().nfaces(i), literal::black); + // Values for D-faces. + vs[D] = face_value; + } + // --------- // // Helpers. // -- 1.6.1.2