[Olena-patches] last-svn-commit-13-g9d8c549 Add a routine to convert to a QImage.

* mln/convert/to_qimage.hh: New. --- milena/ChangeLog | 6 + milena/mln/convert/to_qimage.hh | 411 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 417 insertions(+), 0 deletions(-) create mode 100644 milena/mln/convert/to_qimage.hh diff --git a/milena/ChangeLog b/milena/ChangeLog index d94e481..4164689 100644 --- a/milena/ChangeLog +++ b/milena/ChangeLog @@ -1,5 +1,11 @@ 2010-02-16 Guillaume Lazzara &lt;z(a)lrde.epita.fr&gt; + Add a routine to convert to a QImage. + + * mln/convert/to_qimage.hh: New. + +2010-02-16 Guillaume Lazzara &lt;z(a)lrde.epita.fr&gt; + Add box<>::merge. * mln/core/site_set/box.hh: New member 'merge()'. diff --git a/milena/mln/convert/to_qimage.hh b/milena/mln/convert/to_qimage.hh new file mode 100644 index 0000000..9b2f31c --- /dev/null +++ b/milena/mln/convert/to_qimage.hh @@ -0,0 +1,411 @@ +// Copyright (C) 2009 EPITA Research and Development Laboratory (LRDE) +// +// This file is part of Olena. +// +// Olena is free software: you can redistribute it and/or modify it under +// the terms of the GNU General Public License as published by the Free +// Software Foundation, version 2 of the License. +// +// Olena is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with Olena. If not, see <http://www.gnu.org/licenses/>. +// +// As a special exception, you may use this file as part of a free +// software project without restriction. Specifically, if other files +// instantiate templates or use macros or inline functions from this +// file, or you compile this file and link it with other files to produce +// an executable, this file does not by itself cause the resulting +// executable to be covered by the GNU General Public License. This +// exception does not however invalidate any other reasons why the +// executable file might be covered by the GNU General Public License. + +/// \file +/// +/// Convert a Milena image to a Qimage. + +#ifndef MLN_CONVERT_TO_QIMAGE_HH +# define MLN_CONVERT_TO_QIMAGE_HH + +# include <QtGui/QImage> + +# include <mln/core/concept/image.hh> +# include <mln/geom/nrows.hh> +# include <mln/geom/ncols.hh> +# include <mln/border/resize.hh> + + +# include <mln/value/qt/rgb32.hh> +# include <mln/value/rgb8.hh> + + + +// # undef QT_VERSION +// # define QT_VERSION 0x040000 + + +# if QT_VERSION < 0x040000 +# error "Your version of Qt is too old and is not supported." +# endif + + +namespace mln +{ + + namespace convert + { + + // Implementation + + namespace implementation + { + + + template <typename I> + inline + QImage to_qimage_scalar(const Image<I>& ima_) + { + const I& ima = exact(ima_); + mln_precondition(ima.is_valid()); + + const int + nrows = geom::nrows(ima), + ncols = geom::ncols(ima); + +# if QT_VERSION >= 0x040000 && QT_VERSION < 0x040400 + QImage qima(ncols, nrows, QImage::Format_RGB32); + uchar * ptr_qima = qima.scanLine(0); +# if Q_BYTE_ORDER == Q_LITTLE_ENDIAN + ++ptr_qima; +# endif // ! Q_BYTE_ORDER +# else + QImage qima(ncols, nrows, QImage::Format_RGB888); + uchar * ptr_qima = qima.scanLine(0); +# endif // ! QT_VERSION + + const mln_value(I)* ptr_ima = &ima(ima.domain().pmin()); + unsigned row_offset = ima.delta_index(dpoint2d(+1, - ncols)); + + // Data is stored as ABGR so we skip the first value which is ignored. + for (unsigned row = 0; row < nrows; ++row, ptr_ima += row_offset) + for (unsigned col = 0; col < ncols; ++col) + { + const mln_value(I)& v = *ptr_ima++; + std::memset(ptr_qima, v, sizeof(mln_value(I)) * 3); + +# if QT_VERSION >= 0x040000 && QT_VERSION < 0x040400 + ptr_qima += 4; +# else + ptr_qima += 3; +# endif // ! QT_VERSION + } + + return qima; + } + + + + +// template <typename I> +// inline +// QImage to_qimage_scalar(const Image<I>& ima_) +// { +// const I& ima = exact(ima_); +// mln_precondition(ima.is_valid()); + +// const int +// nrows = geom::nrows(ima), +// ncols = geom::ncols(ima); + +// // Required by a one-shot data copy: +// mln::border::resize(ima, 0); + +// QImage qima(ncols, nrows, QImage::Format_RGB888); +// uchar * ptr_qima = qima.scanLine(0); +// const mln_value(I)* ptr_ima = &ima(ima.domain().pmin()); +// unsigned row_offset = ima.delta_index(dpoint2d(+1, - ncols)); + +// for (unsigned row = 0; row < nrows; ++row, ptr_ima += row_offset) +// for (unsigned col = 0; col < ncols; ++col) +// { +// const mln_value(I)& v = *ptr_ima++; + + + +// std::memcpy(qima.scanLine(0), +// ima.buffer(), +// ima.nelements() * sizeof(mln_value(I))); + +// return qima; +// } + +// # endif // ! QT_VERSION + + + + +# if QT_VERSION >= 0x040000 && QT_VERSION < 0x040400 + + template <typename I> + inline + QImage to_qimage_rgb8(const Image<I>& ima_) + { + const I& ima = exact(ima_); + mln_precondition(ima.is_valid()); + + const int + nrows = geom::nrows(ima), + ncols = geom::ncols(ima); + + QImage qima(ncols, nrows, QImage::Format_RGB32); + uchar * ptr_qima = qima.scanLine(0); + const mln_value(I)* ptr_ima = &ima(ima.domain().pmin()); + unsigned row_offset = ima.delta_index(dpoint2d(+1, - ncols)); + + for (unsigned row = 0; row < nrows; ++row, ptr_ima += row_offset) + for (unsigned col = 0; col < ncols; ++col) + { + const mln::value::rgb8& v = *ptr_ima++; +# if Q_BYTE_ORDER == Q_LITTLE_ENDIAN + // Memory representation : BBGGRRFF + *ptr_qima++ = v.blue(); + *ptr_qima++ = v.green(); + *ptr_qima = v.red(); + ptr_qima += 2; +# else /* Q_BIG_ENDIAN */ + // Memory representation : FFRRGGBB + ++ptr_qima; + *ptr_qima++ = v.red(); + *ptr_qima++ = v.green(); + *ptr_qima = v.blue(); +# endif // ! Q_BYTE_ORDER + } + + return qima; + } + +# else + template <typename I> + inline + QImage to_qimage_rgb8(const Image<I>& ima_) + { + const I& ima = exact(ima_); + mln_precondition(ima.is_valid()); + + const int + nrows = geom::nrows(ima), + ncols = geom::ncols(ima); + + + // Required by a one-shot data copy: + mln::border::resize(ima, 0); + + QImage qima(ncols, nrows, QImage::Format_RGB888); + std::memcpy(qima.scanLine(0), + ima.buffer(), + ima.nelements() * 3); + + return qima; + } +# endif // ! QT_VERSION + + + template <typename I> + inline + QImage to_qimage_qt_rgb32(const Image<I>& ima_) + { + const I& ima = exact(ima_); + mln_precondition(ima.is_valid()); + + const int + nrows = geom::nrows(ima), + ncols = geom::ncols(ima); + + + // Required by a one-shot data copy: + mln::border::resize(ima, 0); + + QImage qima(ncols, nrows, QImage::Format_RGB32); + std::memcpy(qima.scanLine(0), + ima.buffer(), + ima.nelements() * 4); + + return qima; + } + + + // Not used by default since it does not create a deep copy. + template <typename I> + inline + QImage to_qimage_qt_rgb32_nocopy(const Image<I>& ima_) + { + const I& ima = exact(ima_); + mln_precondition(ima.is_valid()); + + const int + nrows = geom::nrows(ima), + ncols = geom::ncols(ima); + + + // Required by a one-shot data copy: + mln::border::resize(ima, 0); + + QImage qima((uchar *)(ima.buffer()), ncols, nrows, + QImage::Format_RGB32); + + return qima; + } + + +// template <typename I> +// inline +// QImage to_qimage_rgb8_3(const Image<I>& ima_) +// { +// const I& ima = exact(ima_); +// mln_precondition(ima.is_valid()); + +// const int +// nrows = geom::nrows(ima), +// ncols = geom::ncols(ima); + +// QImage qima(ncols, nrows, QImage::Format_RGB888); +// uchar * ptr_qima = qima.scanLine(0); +// const mln_value(I)* ptr_ima = &ima(ima.domain().pmin()); +// unsigned row_offset = ima.delta_index(dpoint2d(+1, - ncols)); + +// for (unsigned row = 0; row < nrows; ++row, ptr_ima += row_offset) +// for (unsigned col = 0; col < ncols; ++col) +// { +// const value::rgb8& v = *ptr_ima++; +// *ptr_qima++ = v.red(); +// *ptr_qima++ = v.green(); +// *ptr_qima++ = v.blue(); +// } + +// return qima; +// } + + +// template <typename I> +// inline +// QImage to_qimage_rgb8_4(const Image<I>& ima_) +// { +// const I& ima = exact(ima_); +// mln_precondition(ima.is_valid()); + +// const int +// nrows = geom::nrows(ima), +// ncols = geom::ncols(ima); + + +// // Required by a one-shot data copy: +// mln::border::resize(ima, 0); + +// QImage qima(ncols, nrows, QImage::Format_RGB32); +// std::memcpy(qima.scanLine(0), +// ima.buffer(), +// ima.nelements() * 4); + +// return qima; +// } + + +// template <typename I> +// inline +// QImage to_qimage_rgb8_5(const Image<I>& ima_) +// { +// const I& ima = exact(ima_); +// mln_precondition(ima.is_valid()); + +// const int +// nrows = geom::nrows(ima), +// ncols = geom::ncols(ima); + +// QImage qima(ncols + 2 * ima.border(), +// nrows + 2 * ima.border(), +// QImage::Format_RGB32); +// std::memcpy(qima.scanLine(0), +// ima.buffer(), +// ima.nelements() * 3); + +// return qima; +// } + + + + } // end of namespace mln::convert::implementation + + + + // Dispatch + + namespace internal + { + + template <typename I, typename S> + inline + QImage to_qimage_dispatch(const Image<I>& ima, const value::Scalar<S>&) + { + return implementation::to_qimage_scalar(ima); + } + + template <typename I> + inline + QImage to_qimage_dispatch(const Image<I>& ima, const value::rgb8&) + { + return implementation::to_qimage_rgb8(ima); + } + + template <typename I> + inline + QImage to_qimage_dispatch(const Image<I>& ima, const value::qt::rgb32&) + { + return implementation::to_qimage_qt_rgb32(ima); + } + + + template <typename I, typename V> + inline + QImage to_qimage_dispatch(const Image<I>& ima, V&) + { + // Not supported yet! + mlc_abort(I)::check(); + return QImage(); + } + + + template <typename I> + inline + QImage to_qimage_dispatch(const Image<I>& ima) + { + typedef mln_value(I) V; + return to_qimage_dispatch(ima, V()); + } + + } // end of namespace mln::convert::internal + + + + // Facade + + template <typename I> + inline + QImage to_qimage(const Image<I>& ima_) + { + const I& ima = exact(ima_); + mln_precondition(ima.is_valid()); + + QImage output = internal::to_qimage_dispatch(ima); + + return output; + } + + + } // end of namespace mln::convert + +} // end of namespace mln + +#endif // ! MLN_CONVERT_TO_QIMAGE_HH -- 1.5.6.5