TilemapLoader.cpp

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/*
 * =====================================================================================
 *
 *       Filename:  TilemapLoader.cpp
 *
 *    Description:
 *
 *        Created:  15/02/2019 19:32:33
 *
 *         Author:  Quentin Bazin, <quent42340@gmail.com>
 *
 * =====================================================================================
 */
#include "gk/graphics/Tilemap.hpp"
#include "gk/resource/TilemapLoader.hpp"

namespace gk {

void TilemapLoader::load(const char *xmlFilename, ResourceHandler &handler) {
    XMLFile doc(xmlFilename);

    tinyxml2::XMLElement *mapElement = doc.FirstChildElement("maps").FirstChildElement("map").ToElement();
    while(mapElement) {
        std::string name = mapElement->Attribute("name");
        std::string tilesetName = mapElement->Attribute("tileset");

        Tileset &tileset = handler.get<Tileset>(tilesetName);

        loadMap(name, tileset, handler);

        mapElement = mapElement->NextSiblingElement("map");
    }
}

void TilemapLoader::loadMap(const std::string &name, Tileset &tileset, ResourceHandler &handler) {
    XMLFile doc("resources/maps/" + name + ".tmx");

    tinyxml2::XMLElement *mapElement = doc.FirstChildElement("map").ToElement();

    u16 width = mapElement->IntAttribute("width");
    u16 height = mapElement->IntAttribute("height");

    std::vector<std::vector<u16>> data;
    tinyxml2::XMLElement *layerElement = mapElement->FirstChildElement("layer");
    while (layerElement) {
        tinyxml2::XMLElement *tileElement = layerElement->FirstChildElement("data")->FirstChildElement("tile");

        std::vector<u16> layer;
        while(tileElement) {
            s16 tileID = tileElement->IntAttribute("gid") - 1;

            layer.push_back((tileID >= 0) ? tileID : 0);

            tileElement = tileElement->NextSiblingElement("tile");
        }

        data.emplace_back(std::move(layer));

        layerElement = layerElement->NextSiblingElement("layer");
    }

    handler.add<Tilemap>("map-" + name, width, height, tileset, data);
}

} // namespace gk