/*

Copyright (C) 2016 John W. Eaton
Copyright (C) 2009-2015 Michael Goffioul

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
<http://www.gnu.org/licenses/>.

*/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "base-text-renderer.h"
#include "errwarn.h"
#include "ft-text-renderer.h"
#include "text-renderer.h"

static base_text_renderer *
make_text_renderer (void)
{
  // Allow the possibility of choosing different text rendering
  // implementations.

  return make_ft_text_renderer ();
}

text_renderer::text_renderer (void)
  : rep (make_text_renderer ())
{ }

text_renderer::~text_renderer (void)
{
  delete 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 != 0;
}

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 empty_extent (1, 4, 0.0);

  return ok () ? rep->get_extent (txt, rotation, interpreter) : empty_extent;
}

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);
}

void
text_renderer::set_color (const Matrix& c)
{
  if (ok ())
    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 (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 (ok ())
    rep->text_to_strlist (txt, lst, bbox, halign, valign, rotation,
                          interpreter);
  else
    {
      bbox = empty_bbox;
      lst = empty_lst;
    }
}