Mercurial > octave
view libinterp/corefcn/text-renderer.cc @ 29470:2ae4764180c6
Initial implementation of a LaTeX interpreter (bug #59546).
* NEWS: Announce basic support for "latex" interpreter.
* plot.txi: Restructure the "Use of the interpreter Property" section to include
3 subsections, one for each interpreter type. In "Printing and Saving Plots"
describe the new behavior.
* print.m: Document new behavior.
* contributors.in: Add Andrej Lojdl, a former GSoC student that worked on this
subject. Even though there is not much left of his original work, it served
as a very useful starting point.
* base-text-renderer.h, base-text-renderer.cc: New enum to store symbolic
constants for rotation angles.
(base_text_renderer::rotate_pixels): New utility method. Code extracted
from ft_text_renderer::render.
(base_text_renderer::rotation_to_mode): Moved from ft_text_renderer class.
(base_text_renderer::fix_bbox_anchor): New utility method. Code extracted
from ft_text_renderer::text_to_pixels.
* ft_text_renderer.cc (ft_text_renderer::render,
ft_text_renderer::text_to_pixels): Make use of base class utility functions.
* gl2ps-print.cc: New counter variable m_svg_def_index for safe inclusion of
defs coming from dvisvgm.
(gl2ps_renderer::format_svg_element): New function to manipulate svg elements
obtained from dvisvgm so as to position them properly on the figure and
change their color.
(gl2ps_renderer::strlist_to_svg): If the str_list object returned from
text_to_strlist contains an svg element, use format_svg_element to handle
position and color and then return it. Otherwise, use <g> and <text> elements
rather than <text> and <tspan> elements which are not supported by Qt's svg
renderer (svg-tiny implementation).
(gl2ps_renderer::strlist_to_ps): If the str_list object returned from
text_to_strlist contains an svg element, raise a warning about the
necessity of using -svgconvert.
* latex-text-renderer.h, latex-text-renderer.cc: New files to hold the
latex_interpreter class.
* libinterp/corefcn/module.mk: Add new files to the build system.
* text-renderer.h, text-renderer.cc (text_renderer): New data member latex_rep
to hold a pointer to an instance of a latex_renderer.
(text_renderer::~text_renderer, get_extent, set_anti_aliasing, set_font,
set_color, text_to_pixels, text_to_strlist): Duplicate action of the
latex_rep.
(text_renderer::latex_ok): New method to test the usability of the
latex_renderer.
(text_renderer::string::svg_element, text_renderer::string::set_svg_element,
text_renderer::string::get_svg_element): New string data member to hold
preformated svg element. Provide accessor methods.
* acinclude.m4: Add QtSvg to the list of imported QT_MODULES.
* octave-svgconvert.cc: Overhaul program to make use of Qt's QSvgRenderer
when rendering to PDF.
author | Pantxo Diribarne <pantxo.diribarne@gmail.com> |
---|---|
date | Mon, 22 Mar 2021 21:32:54 +0100 |
parents | 0a5b15007766 |
children | af41ebf3d1b3 |
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//////////////////////////////////////////////////////////////////////// // // Copyright (C) 2009-2021 The Octave Project Developers // // See the file COPYRIGHT.md in the top-level directory of this // distribution or <https://octave.org/copyright/>. // // This file is part of Octave. // // Octave 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, either version 3 of the License, or // (at your option) any later version. // // Octave 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 Octave; see the file COPYING. If not, see // <https://www.gnu.org/licenses/>. // //////////////////////////////////////////////////////////////////////// #if defined (HAVE_CONFIG_H) # include "config.h" #endif #include "base-text-renderer.h" #include "error.h" #include "errwarn.h" #include "ft-text-renderer.h" #include "latex-text-renderer.h" #include "oct-env.h" #include "text-renderer.h" namespace octave { text_renderer::text_renderer (void) : rep (make_ft_text_renderer ()), latex_rep (make_latex_text_renderer ()) { } text_renderer::~text_renderer (void) { delete rep; delete latex_rep; } bool text_renderer::ok (void) const { static bool warned = false; if (! rep) { if (! warned) { warn_disabled_feature ("opengl_renderer::render_text", "rendering text (FreeType)"); warned = true; } } return rep != nullptr; } bool text_renderer::latex_ok (void) const { static bool warned = false; if (! sys::env::getenv ("OCTAVE_LATEX_DEBUG_FLAG").empty () && ! latex_rep && ! warned) { warning_with_id ("Octave:LaTeX:internal-error", "latex_renderer: unusable latex tool-chain"); warned = true; } return latex_rep != nullptr; } Matrix text_renderer::get_extent (text_element *elt, double rotation) { static Matrix empty_extent (1, 4, 0.0); return ok () ? rep->get_extent (elt, rotation) : empty_extent; } Matrix text_renderer::get_extent (const std::string& txt, double rotation, const caseless_str& interpreter) { static Matrix retval (1, 4, 0.0); if (interpreter == "latex" && latex_ok ()) retval = latex_rep->get_extent (txt, rotation, interpreter); else if (ok ()) retval = rep->get_extent (txt, rotation, interpreter); return retval; } void text_renderer::set_anti_aliasing (bool val) { if (ok ()) rep->set_anti_aliasing (val); if (latex_ok ()) latex_rep->set_anti_aliasing (val); } octave_map text_renderer::get_system_fonts (void) { octave_map retval; if (ok ()) retval = rep->get_system_fonts (); return retval; } void text_renderer::set_font (const std::string& name, const std::string& weight, const std::string& angle, double size) { if (ok ()) rep->set_font (name, weight, angle, size); if (latex_ok ()) latex_rep->set_font (name, weight, angle, size); } void text_renderer::set_color (const Matrix& c) { if (ok ()) rep->set_color (c); if (latex_ok ()) latex_rep->set_color (c); } void text_renderer::text_to_pixels (const std::string& txt, uint8NDArray& pxls, Matrix& bbox, int halign, int valign, double rotation, const caseless_str& interpreter, bool handle_rotation) { static Matrix empty_bbox (1, 4, 0.0); static uint8NDArray empty_pxls; if (interpreter == "latex" && latex_ok ()) latex_rep->text_to_pixels (txt, pxls, bbox, halign, valign, rotation, interpreter, handle_rotation); else if (ok ()) rep->text_to_pixels (txt, pxls, bbox, halign, valign, rotation, interpreter, handle_rotation); else { bbox = empty_bbox; pxls = empty_pxls; } } void text_renderer::text_to_strlist (const std::string& txt, std::list<text_renderer::string>& lst, Matrix& bbox, int halign, int valign, double rotation, const caseless_str& interpreter) { static Matrix empty_bbox (1, 4, 0.0); static std::list<text_renderer::string> empty_lst; if (interpreter == "latex" && latex_ok ()) latex_rep->text_to_strlist (txt, lst, bbox, halign, valign, rotation, interpreter); else if (ok ()) rep->text_to_strlist (txt, lst, bbox, halign, valign, rotation, interpreter); else { bbox = empty_bbox; lst = empty_lst; } } }