Hover Tile

//Mapview.cpp
void MapView::draw(const Rect& rect)
{
    // update visible tiles cache when needed
    if(m_mustUpdateVisibleTilesCache || m_updateTilesPos > 0)
        updateVisibleTilesCache(m_mustUpdateVisibleTilesCache ? 0 : m_updateTilesPos);

    float scaleFactor = m_tileSize/(float)Otc::TILE_PIXELS;
    Position cameraPosition = getCameraPosition();

    int drawFlags = 0;
    // First branch:
    // This is unlikely to be false because a lot of us
    // don't wanna hear their GPU fan while playing a
    // 2D game.
    //
    // Second & Third branch:
    // This is likely to be true since not many people have
    // low-end graphics cards.
    if(unlikely(g_map.isForcingAnimations()) || (likely(g_map.isShowingAnimations()) && m_viewMode == NEAR_VIEW))
        drawFlags = Otc::DrawAnimations;

    if(m_viewMode == NEAR_VIEW)
        drawFlags |= Otc::DrawGround | Otc::DrawGroundBorders | Otc::DrawWalls |
                    Otc::DrawItems | Otc::DrawCreatures | Otc::DrawEffects | Otc::DrawMissiles;
    else
        drawFlags |= Otc::DrawGround | Otc::DrawGroundBorders | Otc::DrawWalls | Otc::DrawItems;

    if(m_mustDrawVisibleTilesCache || (drawFlags & Otc::DrawAnimations)) {
        m_framebuffer->bind();

        if(m_mustCleanFramebuffer) {
            Rect clearRect = Rect(0, 0, m_drawDimension * m_tileSize);
            g_painter->setColor(Color::black);
            g_painter->drawFilledRect(clearRect);

            if(m_drawLights) {
                m_lightView->reset();
                m_lightView->resize(m_framebuffer->getSize());

                Light ambientLight;
                if(cameraPosition.z <= Otc::SEA_FLOOR) {
                    ambientLight = g_map.getLight();
                } else {
                    ambientLight.color = 215;
                    ambientLight.intensity = 0;
                }
                ambientLight.intensity = std::max<int>(m_minimumAmbientLight*255, ambientLight.intensity);
                m_lightView->setGlobalLight(ambientLight);
            }
        }
        g_painter->setColor(Color::white);

        auto it = m_cachedVisibleTiles.begin();
        auto end = m_cachedVisibleTiles.end();

        Position hoverPos = g_map.getHoveredPosition();
        Point hoverDest;
        bool isHovered = false;

        for(int z=m_cachedLastVisibleFloor;z>=m_cachedFirstVisibleFloor;--z) {
            clearFloorEffect();
            while(it != end) {
                const TilePtr& tile = *it;
                Position tilePos = tile->getPosition();
                if(tilePos.z != z)
                    break;
                else
                    ++it;
                Point dest = transformPositionTo2D(tilePos, cameraPosition);

                if(tilePos.x == hoverPos.x && tilePos.y == hoverPos.y && tilePos.z == hoverPos.z){
                    isHovered = true;
                    hoverDest = dest;
                }

                if (g_map.isCovered(tilePos, m_cachedFirstVisibleFloor))
                    tile->draw(dest, scaleFactor, drawFlags, this);
                else
                    tile->draw(dest, scaleFactor, drawFlags, this, m_lightView.get());
            }

            //draw spells
            Position centralPosition = g_map.getCentralPosition();
            bool animate = drawFlags & Otc::DrawAnimations;
            if(drawFlags & Otc::DrawEffects) {
                for(const TilePtr& tile : m_tileWithEffect){
                    Point dest = transformPositionTo2D(tile->getPosition(), cameraPosition);
                    tile->drawTileEffect(dest, scaleFactor, drawFlags, centralPosition, animate, m_lightView.get());
                }
            }

            if(drawFlags & Otc::DrawMissiles) {
                for(const MissilePtr& missile : g_map.getFloorMissiles(z)) {
                    missile->draw(transformPositionTo2D(missile->getPosition(), cameraPosition), scaleFactor, drawFlags & Otc::DrawAnimations, m_lightView.get());
                }
            }
        }


        TexturePtr hoverTexture = g_map.getHoverTerxutre();

        if(isHovered && hoverTexture && g_map.canDrawTileAnimation()){
            int frames = 21;
            int ticksPerFrame = 400 / frames;
            int animationPhase = ((g_clock.millis() % (ticksPerFrame * frames)) / ticksPerFrame);
            Rect destRect(hoverDest, 32, 32);
            Rect textureRect(0, animationPhase*32, 32, 32);
            g_painter->drawTexturedRect(destRect, hoverTexture, textureRect);
        }

        m_framebuffer->release();

        // generating mipmaps each frame can be slow in older cards
        //m_framebuffer->getTexture()->buildHardwareMipmaps();

        m_mustDrawVisibleTilesCache = false;
    }


    float fadeOpacity = 1.0f;
    if(!m_shaderSwitchDone && m_fadeOutTime > 0) {
        fadeOpacity = 1.0f - (m_fadeTimer.timeElapsed() / m_fadeOutTime);
        if(fadeOpacity < 0.0f) {
            m_shader = m_nextShader;
            m_nextShader = nullptr;
            m_shaderSwitchDone = true;
            m_fadeTimer.restart();
        }
    }

    if(m_shaderSwitchDone && m_shader && m_fadeInTime > 0)
        fadeOpacity = std::min<float>(m_fadeTimer.timeElapsed() / m_fadeInTime, 1.0f);

    Rect srcRect = calcFramebufferSource(rect.size());
    Point drawOffset = srcRect.topLeft();

    if(m_shader && g_painter->hasShaders() && g_graphics.shouldUseShaders() && m_viewMode == NEAR_VIEW) {
        Rect framebufferRect = Rect(0,0, m_drawDimension * m_tileSize);
        Point center = srcRect.center();
        Point globalCoord = Point(cameraPosition.x - m_drawDimension.width()/2, -(cameraPosition.y - m_drawDimension.height()/2)) * m_tileSize;
        m_shader->bind();
        m_shader->setUniformValue(ShaderManager::MAP_CENTER_COORD, center.x / (float)framebufferRect.width(), 1.0f - center.y / (float)framebufferRect.height());
        m_shader->setUniformValue(ShaderManager::MAP_GLOBAL_COORD, globalCoord.x / (float)framebufferRect.height(), globalCoord.y / (float)framebufferRect.height());
        m_shader->setUniformValue(ShaderManager::MAP_ZOOM, scaleFactor);
        g_painter->setShaderProgram(m_shader);
    }

    g_painter->setColor(Color::white);
    g_painter->setOpacity(fadeOpacity);
    glDisable(GL_BLEND);
#if 0
    // debug source area
    g_painter->saveAndResetState();
    m_framebuffer->bind();
    g_painter->setColor(Color::green);
    g_painter->drawBoundingRect(srcRect, 2);
    m_framebuffer->release();
    g_painter->restoreSavedState();
    m_framebuffer->draw(rect);
#else
    m_framebuffer->draw(rect, srcRect);
#endif
    g_painter->resetShaderProgram();
    g_painter->resetOpacity();
    glEnable(GL_BLEND);


    // this could happen if the player position is not known yet
    if(!cameraPosition.isValid())
        return;

    float horizontalStretchFactor = rect.width() / (float)srcRect.width();
    float verticalStretchFactor = rect.height() / (float)srcRect.height();

    // avoid drawing texts on map in far zoom outs
    if(m_viewMode == NEAR_VIEW) {
        for(const CreaturePtr& creature : m_cachedFloorVisibleCreatures) {
            if(!creature->canBeSeen())
                continue;

            PointF jumpOffset = creature->getJumpOffset() * scaleFactor;
            Point creatureOffset = Point(16 - creature->getDisplacementX(), - creature->getDisplacementY() - 2);
            Position pos = creature->getPosition();
            Point p = transformPositionTo2D(pos, cameraPosition) - drawOffset;
            p += (creature->getDrawOffset() + creatureOffset) * scaleFactor - Point(stdext::round(jumpOffset.x), stdext::round(jumpOffset.y));
            p.x = p.x * horizontalStretchFactor;
            p.y = p.y * verticalStretchFactor;
            p += rect.topLeft();

            int flags = 0;
            if(m_drawNames){ flags = Otc::DrawNames; }
            if(m_drawHealthBars) { flags |= Otc::DrawBars; }
            creature->drawInformation(p, g_map.isCovered(pos, m_cachedFirstVisibleFloor), rect, flags);
        }
    }

    // lights are drawn after names and before texts
    if(m_drawLights)
        m_lightView->draw(rect, srcRect);

    if(m_viewMode == NEAR_VIEW && m_drawTexts) {
        for(const StaticTextPtr& staticText : g_map.getStaticTexts()) {
            Position pos = staticText->getPosition();

            // ony draw static texts from current camera floor, unless yells
            //if(pos.z != cameraPosition.z && !staticText->isYell())
            //    continue;

            if(pos.z != cameraPosition.z && staticText->getMessageMode() == Otc::MessageNone)
                continue;

            Point p = transformPositionTo2D(pos, cameraPosition) - drawOffset;
            p.x = p.x * horizontalStretchFactor;
            p.y = p.y * verticalStretchFactor;
            p += rect.topLeft();
            staticText->drawText(p, rect);
        }

        for(const AnimatedTextPtr& animatedText : g_map.getAnimatedTexts()) {
            Position pos = animatedText->getPosition();

            /*
            // only draw animated texts from visible floors
            if(pos.z < m_cachedFirstVisibleFloor || pos.z > m_cachedLastVisibleFloor)
                continue;

            // dont draw animated texts from covered tiles
            if(pos.z != cameraPosition.z && g_map.isCovered(pos, m_cachedFirstVisibleFloor))
                continue;
            */
            if(pos.z != cameraPosition.z)
                continue;

            Point p = transformPositionTo2D(pos, cameraPosition) - drawOffset;
            p.x = p.x * horizontalStretchFactor;
            p.y = p.y * verticalStretchFactor;
            p += rect.topLeft();
            animatedText->drawText(p, rect);
        }
    }
}
//map.h
    Position getHoveredPosition();
    bool installSqmTexture(const std::string &path){
        m_hoverTexture = g_textures.getTexture(path);
        return m_hoverTexture == nullptr ? false : true;
    }
    TexturePtr getHoverTerxutre() { return m_hoverTexture;}
    void registerUiMapPtr(const UIMapPtr& ptr){m_uiMapPtr = ptr;};
    void unregisterUiMapPtr(){m_uiMapPtr = nullptr;}
    bool canDrawTileAnimation(){ return m_drawTileAnimation;}
    void drawTileAnimation(bool v){ m_drawTileAnimation = v;}

//map.cpp
Position Map::getHoveredPosition(){
    Position hoveredPosition;
    if (!m_uiMapPtr){
        return hoveredPosition;
    }

    TilePtr tile = m_uiMapPtr->getTile(g_window.getMousePosition());
    if (!tile){
        return hoveredPosition;
    }

    hoveredPosition = tile->getPosition();

    return hoveredPosition;
}

//modules/game_interface/uigamemap.lua
function UIGameMap.create()
  local gameMap = UIGameMap.internalCreate()
  gameMap:setKeepAspectRatio(true)
  gameMap:setVisibleDimension({width = 15, height = 11})
  gameMap:setDrawLights(true)
  g_map.registerUiMapPtr(gameMap)
  return gameMap
end

//gameinterface.lua
function terminate()
  hide()

  hookedMenuOptions = {}

  stopSmartWalk()

  disconnect(g_game, {
    onGameStart = onGameStart,
    onGameEnd = onGameEnd,
    onLoginAdvice = onLoginAdvice
  })

  disconnect(gameLeftPanel, { onVisibilityChange = onLeftPanelVisibilityChange })

  logoutButton:destroy()
  gameRootPanel:destroy()
  g_map.unregisterUiMapPtr()
end