[Olena-patches] last-svn-commit-858-gbc3f2b6 Make use of opacity in PDF output.

* demo/xml2doc/image_crop.cc: Create opacity mask. * scribo/io/xml/internal/extended_page_xml_visitor.hh: Add bbox information in region tag. --- scribo/ChangeLog | 9 +++ scribo/demo/xml2doc/image_crop.cc | 60 +++++++++++++------- .../io/xml/internal/extended_page_xml_visitor.hh | 21 ++++++- 3 files changed, 67 insertions(+), 23 deletions(-) diff --git a/scribo/ChangeLog b/scribo/ChangeLog index a213078..efc42cf 100644 --- a/scribo/ChangeLog +++ b/scribo/ChangeLog @@ -1,3 +1,12 @@ +2011-05-05 Guillaume Lazzara &lt;lazzara(a)fidji.lrde.epita.fr&gt; + + Make use of opacity in PDF output. + + * demo/xml2doc/image_crop.cc: Create opacity mask. + + * scribo/io/xml/internal/extended_page_xml_visitor.hh: Add bbox + information in region tag. + 2011-05-04 Guillaume Lazzara &lt;lazzara(a)fidji.lrde.epita.fr&gt; Small fixes in Scribo. diff --git a/scribo/demo/xml2doc/image_crop.cc b/scribo/demo/xml2doc/image_crop.cc index ba30d8a..7d61f75 100644 --- a/scribo/demo/xml2doc/image_crop.cc +++ b/scribo/demo/xml2doc/image_crop.cc @@ -1,4 +1,5 @@ -// Copyright (C) 2010 EPITA Research and Development Laboratory (LRDE) +// Copyright (C) 2010, 2011 EPITA Research and Development Laboratory +// (LRDE) // // This file is part of Olena. // @@ -16,10 +17,13 @@ #include <limits.h> +#include <scribo/core/macros.hh> #include <scribo/preprocessing/crop.hh> #include <mln/value/rgb8.hh> #include <mln/core/alias/box2d.hh> #include <mln/core/image/image2d.hh> +#include <mln/util/couple.hh> +#include <mln/draw/line.hh> #include <mln/io/magick/save.hh> #include <mln/io/magick/load.hh> #include <mln/io/ppm/all.hh> @@ -28,6 +32,7 @@ #include "loader.hh" #include "common.hh" +#include <mln/io/pbm/save.hh> ImageCrop::ImageCrop(const QString& xml, const QString& img, const QString& output) @@ -270,7 +275,14 @@ bool ImageCrop::crop_regions(bool temp) QDomNode coords = region.firstChild(); QString id = region.toElement().attribute("id", "none"); - // qDebug() << region.toElement().tagName(); + // Retrieve region bbox. + using namespace mln; + def::coord + x_min = region.toElement().attribute("x_min").toInt(), + y_min = region.toElement().attribute("y_min").toInt(), + x_max = region.toElement().attribute("x_max").toInt(), + y_max = region.toElement().attribute("y_max").toInt(); + box2d box = make::box2d(y_min, x_min, y_max, x_max); while (!coords.isNull() && !coords.toElement().tagName().contains("coords")) coords = coords.nextSibling(); @@ -279,44 +291,52 @@ bool ImageCrop::crop_regions(bool temp) break; QDomNode point = coords.firstChild(); - int x_max = 0; - int y_max = 0; - int x_min = INT_MAX; - int y_min = INT_MAX; + // For each row, store first and last column of the line + // to be set as object. The rest will be considered as + // transparent. + util::array<util::couple<def::coord, def::coord> > + p_mask(box.nrows(), + util::couple<def::coord, def::coord>(x_max + 1, x_min - 1)); + + // Compute opacity mask for image region. while (!point.isNull()) { int x = point.toElement().attribute("x", "none").toInt(); int y = point.toElement().attribute("y", "none").toInt(); - if (x < x_min) - x_min = x; - if (x > x_max) - x_max = x; - - if (y < y_min) - y_min = y; - if (y > y_max) - y_max = y; + if (p_mask(y - y_min).first() > x) + p_mask(y - y_min).first() = x; + if (p_mask(y - y_min).second() < x) + p_mask(y - y_min).second() = x; point = point.nextSibling(); } - using namespace mln; - box2d box = make::box2d(y_min, x_min, y_max, x_max); - + // Crop image in input. image2d<value::rgb8> crop = scribo::preprocessing::crop(ima_, box); + // Build image mask. + image2d<bool> opacity_mask(box); + { + data::fill(opacity_mask, true); + for_all_elements(e, p_mask) + draw::line(opacity_mask, + point2d(e + y_min, p_mask(e).first()), + point2d(e + y_min, p_mask(e).second()), + false); + } + if (temp) { QTemporaryFile tmp(output_dir_ + id + ".XXXXXX.png"); tmp.open(); region_map_[id] = tmp.fileName(); tmp.setAutoRemove(false); - io::magick::save(crop, tmp.fileName().toStdString()); + io::magick::save(crop, opacity_mask, tmp.fileName().toStdString()); } else - io::magick::save(crop, QString(output_dir_ + id + ".png").toStdString()); + io::magick::save(crop, opacity_mask, QString(output_dir_ + id + ".png").toStdString()); } region = region.nextSibling(); } diff --git a/scribo/scribo/io/xml/internal/extended_page_xml_visitor.hh b/scribo/scribo/io/xml/internal/extended_page_xml_visitor.hh index b463677..eaf08ac 100644 --- a/scribo/scribo/io/xml/internal/extended_page_xml_visitor.hh +++ b/scribo/scribo/io/xml/internal/extended_page_xml_visitor.hh @@ -166,7 +166,12 @@ namespace scribo { output << " <whitespace_separator_region id=\"wss" << info.id() - << "\">" << std::endl; + << "\"" + << " x_min=\"" << info.bbox().pmin().col() << "\"" + << " y_min=\"" << info.bbox().pmin().row() << "\"" + << " x_max=\"" << info.bbox().pmax().col() << "\"" + << " y_max=\"" << info.bbox().pmax().row() << "\"" + << ">" << std::endl; internal::print_box_coords(output, info.bbox(), " "); @@ -179,7 +184,12 @@ namespace scribo output << " <separator_region id=\"sr" << info.id() << "\" sep_orientation=\"0.000000\" " << " sep_colour=\"Black\" " - << " sep_bgcolour=\"White\">" << std::endl; + << " sep_bgcolour=\"White\"" + << " x_min=\"" << info.bbox().pmin().col() << "\"" + << " y_min=\"" << info.bbox().pmin().row() << "\"" + << " x_max=\"" << info.bbox().pmax().col() << "\"" + << " y_max=\"" << info.bbox().pmax().row() << "\"" + << ">" << std::endl; internal::print_box_coords(output, info.bbox(), " "); @@ -195,7 +205,12 @@ namespace scribo << "\" img_colour_type=\"24_Bit_Colour\"" << " img_orientation=\"0.000000\" " << " img_emb_text=\"No\" " - << " img_bgcolour=\"White\">" << std::endl; + << " img_bgcolour=\"White\"" + << " x_min=\"" << info.bbox().pmin().col() << "\"" + << " y_min=\"" << info.bbox().pmin().row() << "\"" + << " x_max=\"" << info.bbox().pmax().col() << "\"" + << " y_max=\"" << info.bbox().pmax().row() << "\"" + << ">" << std::endl; internal::print_image_coords(output, ((elt_edge | info.bbox()) -- 1.5.6.5