floatingtextrenderer.cpp

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/***************************************************************************
 *   Copyright (C) 2005-2019 by the FIFE team                              *
 *   http://www.fifengine.net                                              *
 *   This file is part of FIFE.                                            *
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 *   FIFE is free software; you can redistribute it and/or                 *
 *   modify it under the terms of the GNU Lesser General Public            *
 *   License as published by the Free Software Foundation; either          *
 *   version 2.1 of the License, or (at your option) any later version.    *
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 *   This library 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     *
 *   Lesser General Public License for more details.                       *
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 *   You should have received a copy of the GNU Lesser General Public      *
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 *   Free Software Foundation, Inc.,                                       *
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// Standard C++ library includes

// 3rd party library includes

// FIFE includes
// These includes are split up in two parts, separated by one empty line
// First block: files included from the FIFE root src directory
// Second block: files included from the same folder
#include "video/renderbackend.h"
#include "util/math/fife_math.h"
#include "util/log/logger.h"
#include "video/fonts/ifont.h"
#include "video/image.h"
#include "model/structures/instance.h"
#include "model/structures/layer.h"
#include "model/structures/location.h"

#include "view/visual.h"
#include "view/camera.h"
#include "floatingtextrenderer.h"


namespace FIFE {
    static Logger _log(LM_VIEWVIEW);

    FloatingTextRenderer::FloatingTextRenderer(RenderBackend* renderbackend, int32_t position):
        RendererBase(renderbackend, position),
        m_renderbackend(renderbackend),
        m_font(0),
        m_font_color(false),
        m_background(false),
        m_backborder(false) {
        setEnabled(false);
    }

    FloatingTextRenderer::FloatingTextRenderer(const FloatingTextRenderer& old):
        RendererBase(old),
        m_renderbackend(old.m_renderbackend),
        m_font(old.m_font),
        m_font_color(old.m_font_color),
        m_color(old.m_color),
        m_background(old.m_background),
        m_backborder(old.m_backborder) {
        setEnabled(false);
    }

    RendererBase* FloatingTextRenderer::clone() {
        return new FloatingTextRenderer(*this);
    }

    FloatingTextRenderer::~FloatingTextRenderer() {
    }

    void FloatingTextRenderer::render(Camera* cam, Layer* layer, RenderList& instances) {
        if (!m_font) {
            //no font selected.. nothing to render
            return;
        }

        RenderList::const_iterator instance_it = instances.begin();
        uint32_t lm = m_renderbackend->getLightingModel();
        SDL_Color old_color = m_font->getColor();
        if(m_font_color) {
            m_font->setColor(m_color.r, m_color.g, m_color.b, m_color.a);
        }
        for (;instance_it != instances.end(); ++instance_it) {
            Instance* instance = (*instance_it)->instance;
            const std::string* saytext = instance->getSayText();
            if (saytext) {
                const Rect& ir = (*instance_it)->dimensions;
                Image* img = m_font->getAsImageMultiline(*saytext);
                Rect r;
                r.x = (ir.x + ir.w/2) - img->getWidth()/2; 
                r.y = ir.y- img->getHeight(); 
                r.w = img->getWidth();
                r.h = img->getHeight();
                // Without this check it can happen that changeRenderInfos() call produces an out_of_range error
                // because the image rendering can be skipped, if it's not on the screen.
                // The result is that it tried to modify more objects as exist.
                if (r.right() < 0 || r.x > static_cast<int32_t>(m_renderbackend->getWidth()) || 
                    r.bottom() < 0 || r.y > static_cast<int32_t>(m_renderbackend->getHeight())) {
                    continue;
                }
                if(m_background || m_backborder) {
                    const int32_t overdraw = 5;

                    Point p = Point(r.x-overdraw, r.y-overdraw);

                    if(m_background) {
                        m_renderbackend->fillRectangle(p, r.w+2*overdraw, r.h+2*overdraw, m_backcolor.r, m_backcolor.g, m_backcolor.b, m_backcolor.a);
                    }

                    if(m_backborder) {
                        m_renderbackend->drawRectangle(p, r.w+2*overdraw, r.h+2*overdraw, m_backbordercolor.r, m_backbordercolor.g, m_backbordercolor.b, m_backbordercolor.a);
                    }
                }
                img->render(r);
                if(lm > 0) {
                    uint16_t elements = 1;
                    if (m_background) {
                        ++elements;
                    }
                    if (m_backborder) {
                        ++elements;
                    }
                    m_renderbackend->changeRenderInfos(RENDER_DATA_WITHOUT_Z, elements, 4, 5, false, true, 255, REPLACE, ALWAYS);
                }
            }
        }
        if(m_font_color) {
            m_font->setColor(old_color.r, old_color.g, old_color.b, old_color.a);
        }
    }

    void FloatingTextRenderer::setColor(uint8_t r, uint8_t g, uint8_t b, uint8_t a) {
        m_color.r = r;
        m_color.g = g;
        m_color.b = b;
        m_color.a = a;

        m_font_color = true;
    }

    void FloatingTextRenderer::setBackground(uint8_t br, uint8_t bg, uint8_t bb, uint8_t ba) {
        m_backcolor.r = br;
        m_backcolor.g = bg;
        m_backcolor.b = bb;
        m_backcolor.a = ba;

        m_background = true;
    }

    void FloatingTextRenderer::setBorder(uint8_t bbr, uint8_t bbg, uint8_t bbb, uint8_t bba) {
        m_backbordercolor.r = bbr;
        m_backbordercolor.g = bbg;
        m_backbordercolor.b = bbb;
        m_backbordercolor.a = bba;

        m_backborder = true;
    }

    void FloatingTextRenderer::resetBackground() {
        m_background = false;
    }

    void FloatingTextRenderer::resetBorder() {
        m_backborder = false;
    }

    FloatingTextRenderer* FloatingTextRenderer::getInstance(IRendererContainer* cnt) {
        return dynamic_cast<FloatingTextRenderer*>(cnt->getRenderer("FloatingTextRenderer"));
    }
}