CTextMessageCapable.cpp

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/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          https://www.mrpt.org/                         |
   |                                                                        |
   | Copyright (c) 2005-2020, Individual contributors, see AUTHORS file     |
   | See: https://www.mrpt.org/Authors - All rights reserved.               |
   | Released under BSD License. See: https://www.mrpt.org/License          |
   +------------------------------------------------------------------------+ */

#include "opengl-precomp.h"  // Precompiled header

#include <mrpt/opengl/CTextMessageCapable.h>

#include <mrpt/opengl/opengl_api.h>

using namespace std;
using namespace mrpt;
using namespace mrpt::opengl;

void CTextMessageCapable::TListTextMessages::regenerateGLobjects() const
{
    // (re)generate the opengl CText objects for each label:
    for (auto& kv : messages)
    {
        const DataPerText& labelData = kv.second;
        if (labelData.gl_text && labelData.gl_text_outdated) continue;

        if (!labelData.gl_text)
        {
            labelData.gl_text = mrpt::opengl::CText::Create();
        }
        if (labelData.draw_shadow && !labelData.gl_text_shadow)
            labelData.gl_text_shadow = mrpt::opengl::CText::Create();

        if (!labelData.draw_shadow && labelData.gl_text_shadow)
            labelData.gl_text_shadow.reset();

        kv.second.gl_text_outdated = false;
    }
}

void CTextMessageCapable::clearTextMessages() { m_2D_texts.messages.clear(); }

/** Just updates the text of a given text message, without touching the other
 * parameters.
 * \return false if given ID doesn't exist.
 */
bool CTextMessageCapable::updateTextMessage(
    const size_t unique_index, const std::string& text)
{
    auto it = m_2D_texts.messages.find(unique_index);
    if (it == m_2D_texts.messages.end())
        return false;
    else
    {
        it->second.text = text;
        it->second.gl_text_outdated = true;
        return true;
    }
}

/// overload with more font parameters - refer to
/// mrpt::opengl::gl_utils::glDrawText()
void CTextMessageCapable::addTextMessage(
    const double x_frac, const double y_frac, const std::string& text,
    const size_t unique_index, const TFontParams& fontParams)
{
    DataPerText d;
    static_cast<TFontParams&>(d) = fontParams;
    d.text = text;
    d.x = x_frac;
    d.y = y_frac;

    m_2D_texts.messages[unique_index] = std::move(d);
}