coordinaterenderer.cpp

/***************************************************************************
 *   Copyright (C) 2005-2008 by the FIFE team                              *
 *   http://www.fifengine.de                                               *
 *   This file is part of FIFE.                                            *
 *                                                                         *
 *   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.    *
 *                                                                         *
 *   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.                       *
 *                                                                         *
 *   You should have received a copy of the GNU Lesser General Public      *
 *   License along with this library; if not, write to the                 *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
 ***************************************************************************/

// 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 "video/image.h"
#include "video/fonts/ifont.h"
#include "util/math/fife_math.h"
#include "util/log/logger.h"
#include "model/metamodel/grids/cellgrid.h"
#include "model/metamodel/action.h"
#include "model/structures/instance.h"
#include "model/structures/layer.h"
#include "model/structures/location.h"

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


namespace FIFE {
    static Logger _log(LM_VIEWVIEW);

    CoordinateRenderer::CoordinateRenderer(RenderBackend* renderbackend, int32_t position):
        RendererBase(renderbackend, position),
        m_layer_area(),
        m_tmploc(),
        m_c(),
        m_font(0),
        m_font_color(false),
        m_zoom(true) {
        setEnabled(false);
    }

    CoordinateRenderer::CoordinateRenderer(const CoordinateRenderer& old):
        RendererBase(old),
        m_layer_area(),
        m_tmploc(),
        m_c(),
        m_font(old.m_font),
        m_font_color(false),
        m_color(old.m_color),
        m_zoom(old.m_zoom) {
        setEnabled(false);
    }

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

    CoordinateRenderer::~CoordinateRenderer() {
    }

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

    void CoordinateRenderer::adjustLayerArea() {
        m_tmploc.setMapCoordinates(m_c);
        ModelCoordinate c = m_tmploc.getLayerCoordinates();
        m_layer_area.x = std::min(c.x, m_layer_area.x);
        m_layer_area.w = std::max(c.x, m_layer_area.w);
        m_layer_area.y = std::min(c.y, m_layer_area.y);
        m_layer_area.h = std::max(c.y, m_layer_area.h);
    }

    const int32_t MIN_COORD = -9999999;
    const int32_t MAX_COORD = 9999999;
    void CoordinateRenderer::render(Camera* cam, Layer* layer, RenderList& instances) {
        if (!m_font) {
            //no font selected.. nothing to render
            return;
        }
        Rect r = Rect();
        const bool zoomed = (!Mathd::Equal(1.0, cam->getZoom()) && m_zoom);
        Rect cv = cam->getViewPort();

        m_tmploc.setLayer(layer);
        m_layer_area.x = MAX_COORD;
        m_layer_area.y = MAX_COORD;
        m_layer_area.w = MIN_COORD;
        m_layer_area.h = MIN_COORD;

        m_c = cam->toMapCoordinates(ScreenPoint(cv.x, cv.y), false);
        adjustLayerArea();
        m_c = cam->toMapCoordinates(ScreenPoint(cv.x+cv.w, cv.y), false);
        adjustLayerArea();
        m_c = cam->toMapCoordinates(ScreenPoint(cv.x, cv.y+cv.h), false);
        adjustLayerArea();
        m_c = cam->toMapCoordinates(ScreenPoint(cv.x+cv.w, cv.y+cv.h), false);
        adjustLayerArea();

        SDL_Color old_color = m_font->getColor();
        if(old_color.r != m_color.r || old_color.g != m_color.g || old_color.b != m_color.b) {
            m_font->setColor(m_color.r, m_color.g, m_color.b);
            m_font_color = true;
        }
        for (int32_t x = m_layer_area.x-1; x < m_layer_area.w+1; x++) {
            for (int32_t y = m_layer_area.y-1; y < m_layer_area.h+1; y++) {
                ModelCoordinate mc(x, y);
                m_tmploc.setLayerCoordinates(mc);
                ScreenPoint drawpt = cam->toScreenCoordinates(m_tmploc.getMapCoordinates());
                if (drawpt.x < cv.x || drawpt.x > cv.x + cv.w ||
                    drawpt.y < cv.y || drawpt.y > cv.y + cv.h) {
                    continue;
                }

                // we split the stringstream in three images, because so the TextRenderPool can reuse the most images.
                // more to render but less images to generate
                std::stringstream sts;
                sts << mc.x;
                Image* imgx = m_font->getAsImage(sts.str());
                sts.str(",");
                Image* imgc = m_font->getAsImage(sts.str());
                sts.str("");
                sts << mc.y;
                Image* imgy = m_font->getAsImage(sts.str());

                if (zoomed) {
                    double zoom = cam->getZoom();
                    r.x = drawpt.x - ((imgx->getWidth() + imgc->getWidth() + imgy->getWidth())/2) * zoom;
                    r.y = drawpt.y - (imgx->getHeight()/2) * zoom;
                    r.w = imgx->getWidth() * zoom;
                    r.h = imgx->getHeight() * zoom;
                    imgx->render(r);
                    r.x += r.w;
                    r.w = imgc->getWidth() * zoom;
                    imgc->render(r);
                    r.x += r.w;
                    r.w = imgy->getWidth() * zoom;
                    imgy->render(r);
                } else {
                    r.x = drawpt.x - (imgx->getWidth() + imgc->getWidth() + imgy->getWidth())/2;
                    r.y = drawpt.y - imgx->getHeight()/2;
                    r.w = imgx->getWidth();
                    r.h = imgx->getHeight();
                    imgx->render(r);
                    r.x += r.w;
                    r.w = imgc->getWidth();
                    imgc->render(r);
                    r.x += r.w;
                    r.w = imgy->getWidth();
                    imgy->render(r);
                }
            }
        }
        if(m_font_color) {
            m_font->setColor(old_color.r, old_color.g, old_color.b);
            m_font_color = false;
        }
    }

    void CoordinateRenderer::setColor(uint8_t r, uint8_t g, uint8_t b) {
        m_color.r = r;
        m_color.g = g;
        m_color.b = b;
    }
}