feat(editor): Tilemap editable amb setTileAt/save (Debug-only)

source/game/map/tilemap.cpp

@@ -13,6 +13,10 @@
 #include "core/resources/resource_helper.hpp"
 #include "external/fkyaml_node.hpp"
 
+#ifdef _DEBUG
+#include "game/map/tilemap_writer.hpp"
+#endif
+
 namespace {
 
     // Copia un tile (col, fila) del tileset al buffer ARGB a la posició de
@@ -45,8 +49,8 @@ Tilemap::Tilemap(const std::string& yaml_path) {
     const auto* end = begin + bytes.size();
     auto yaml = fkyaml::node::deserialize(begin, end);
 
-    const auto TILESET_PATH = yaml["tileset"].get_value<std::string>();
-    const auto TILE_SIZE = yaml["tile_size"].get_value<int>();
+    tileset_path_ = yaml["tileset"].get_value<std::string>();
+    tile_size_ = yaml["tile_size"].get_value<int>();
     if (yaml.contains("origin")) {
         origin_x_ = yaml["origin"][0].get_value<int>();
         origin_y_ = yaml["origin"][1].get_value<int>();
@@ -55,10 +59,9 @@ Tilemap::Tilemap(const std::string& yaml_path) {
     // Carreguem el tileset al cache (idempotent) i el pillem per accedir
     // als seus píxels i paleta. La paleta del tileset ve del GIF mateix.
     // Ens cal abans de llegir `data` per saber quants tiles per fila té.
-    const auto& cache_name = TILESET_PATH;
-    Resource::Cache::get().loadSurface(cache_name, TILESET_PATH);
-    const auto TILESET = Resource::Cache::get().getSurface(cache_name);
-    const int TILESET_COLS = TILESET->getWidth() / TILE_SIZE;
+    Resource::Cache::get().loadSurface(tileset_path_, tileset_path_);
+    const auto TILESET = Resource::Cache::get().getSurface(tileset_path_);
+    tileset_cols_ = TILESET->getWidth() / tile_size_;
 
     // `data` és una seqüència de seqüències d'enters: cada fila és una
     // llista d'índexs lineals al tileset (esq→dre, dalt→baix). Un valor
@@ -67,30 +70,65 @@ Tilemap::Tilemap(const std::string& yaml_path) {
     if (!data.is_sequence() || data.empty()) {
         throw std::runtime_error("Tilemap: `data` buit o amb format incorrecte a " + yaml_path);
     }
-    const int ROWS = static_cast<int>(data.size());
-    const int COLS = static_cast<int>(data[0].size());
-    width_px_ = COLS * TILE_SIZE;
-    height_px_ = ROWS * TILE_SIZE;
+    rows_ = static_cast<int>(data.size());
+    cols_ = static_cast<int>(data[0].size());
+    width_px_ = cols_ * tile_size_;
+    height_px_ = rows_ * tile_size_;
     pixels_.assign(
         static_cast<std::size_t>(width_px_) * static_cast<std::size_t>(height_px_),
         0U);
 
-    for (int row = 0; row < ROWS; ++row) {
+#ifdef _DEBUG
+    data_.assign(static_cast<std::size_t>(rows_), std::vector<int>(static_cast<std::size_t>(cols_), -1));
+#endif
+
+    for (int row = 0; row < rows_; ++row) {
         const auto& line = data[row];
         const int LINE_COLS = static_cast<int>(line.size());
-        for (int col = 0; col < COLS && col < LINE_COLS; ++col) {
+        for (int col = 0; col < cols_ && col < LINE_COLS; ++col) {
             const int INDEX = line[col].get_value<int>();
+#ifdef _DEBUG
+            data_[static_cast<std::size_t>(row)][static_cast<std::size_t>(col)] = INDEX;
+#endif
             if (INDEX < 0) { continue; }
-            const int SRC_COL = INDEX % TILESET_COLS;
-            const int SRC_ROW = INDEX / TILESET_COLS;
-            blitTile(*TILESET, TILE_SIZE, SRC_COL, SRC_ROW, pixels_, width_px_, col * TILE_SIZE, row * TILE_SIZE);
+            const int SRC_COL = INDEX % tileset_cols_;
+            const int SRC_ROW = INDEX / tileset_cols_;
+            blitTile(*TILESET, tile_size_, SRC_COL, SRC_ROW, pixels_, width_px_, col * tile_size_, row * tile_size_);
         }
     }
 
-    std::cout << "Tilemap: " << COLS << "x" << ROWS << " tiles ("
+    std::cout << "Tilemap: " << cols_ << "x" << rows_ << " tiles ("
               << width_px_ << "x" << height_px_ << " px) des de " << yaml_path << '\n';
 }
 
+#ifdef _DEBUG
+void Tilemap::setTileAt(int col, int row, int index) {
+    if (col < 0 || col >= cols_ || row < 0 || row >= rows_) { return; }
+    if (index < 0) { return; }  // El mapa no admet cel·les buides (política de projecte).
+    // No validem l'índex contra el total de tiles del tileset: la
+    // invariant la garanteix el TilePicker, que només ofereix índexs en
+    // rang.
+
+    data_[static_cast<std::size_t>(row)][static_cast<std::size_t>(col)] = index;
+
+    // Netegem el rectangle del tile al buffer de píxels i re-blitegem.
+    const int DX = col * tile_size_;
+    const int DY = row * tile_size_;
+    for (int y = 0; y < tile_size_; ++y) {
+        auto* dst = &pixels_[(static_cast<std::size_t>(DY + y) * static_cast<std::size_t>(width_px_)) + static_cast<std::size_t>(DX)];
+        for (int x = 0; x < tile_size_; ++x) { dst[x] = 0U; }
+    }
+    const auto TILESET = Resource::Cache::get().getSurface(tileset_path_);
+    const int SRC_COL = index % tileset_cols_;
+    const int SRC_ROW = index / tileset_cols_;
+    blitTile(*TILESET, tile_size_, SRC_COL, SRC_ROW, pixels_, width_px_, DX, DY);
+}
+
+auto Tilemap::save(const std::string& yaml_path) const -> bool {
+    return TilemapWriter::saveDataBlock(yaml_path, data_);
+}
+#endif
+
 void Tilemap::render() const {
     auto& screen = Screen::get();
     auto* canvas = screen.getCanvasArgb();