fix async issues with minimap rendering

src/noggit/AsyncLoader.cpp

@@ -8,6 +8,26 @@
 #include <algorithm>
 #include <list>
 
+bool AsyncLoader::is_loading()
+{
+  std::lock_guard<std::mutex> const lock (_guard);
+  if (_currently_loading.empty())
+  {
+    return false;
+  }
+  else
+  {
+    for (auto async_obj : _currently_loading)
+    {
+      if (!async_obj->loading_failed() && async_obj->filename.length()) // the filename check is a hack
+      {
+        return true;
+      }
+    }
+  }
+  return false;
+}
+
 void AsyncLoader::process()
 {
   AsyncObject* object = nullptr;

src/noggit/AsyncLoader.h

@@ -26,6 +26,8 @@ public:
   
   void ensure_deletable (AsyncObject*);
 
+  bool is_loading();
+
   AsyncLoader(int numThreads);
   ~AsyncLoader();
 

src/noggit/MapView.cpp

@@ -1534,17 +1534,46 @@ void MapView::paintGL()
 
   if (Saving)
   {
-    // std::this_thread::sleep_for(std::chrono::seconds {10});
-    _world->saveMinimap(512, 512, tile_index (_camera.position));
-    Saving = false;
-    return;
+    // increment tile indices here
+    if (mmap_render_success)
+    {
+      mmap_render_index++;
+    }
+
+    tile_index tile = tile_index(mmap_render_index / 64, mmap_render_index % 64);
+
+    if (_world->mapIndex.hasTile(tile))
+    {
+      mmap_render_success = _world->saveMinimap(512, 512, tile);
+    }
+    else
+    {
+      do
+      {
+        mmap_render_index++;
+        tile.x = mmap_render_index / 64;
+        tile.z = mmap_render_index % 64;
+
+      } while (!_world->mapIndex.hasTile(tile) && mmap_render_index != 4095);
+    }
+
+    if (mmap_render_success && mmap_render_index == 4095)
+    {
+      Saving = false;
+      mmap_render_index = 0;
+      mmap_render_success = false;
+    }
   }
 
   const qreal now(_startup_time.elapsed() / 1000.0);
 
   _last_frame_durations.emplace_back (now - _last_update);
 
-  tick (now - _last_update);
+  if (!Saving)
+  {
+    tick (now - _last_update);
+  }
+
   _last_update = now;
 
   gl.clear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
@@ -1556,12 +1585,13 @@ void MapView::paintGL()
     _uid_duplicate_warning_shown = true;
 
     QMessageBox::critical( this
-                          , "UID ALREADY IN USE"
-                          , "Please enable 'Always check for max UID', mysql uid store or synchronize your "
-                            "uid.ini file if you're sharing the map between several mappers.\n\n"
-                            "Use 'Editor > Force uid check on next opening' to fix the issue."
-                          );
+        , "UID ALREADY IN USE"
+        , "Please enable 'Always check for max UID', mysql uid store or synchronize your "
+          "uid.ini file if you're sharing the map between several mappers.\n\n"
+          "Use 'Editor > Force uid check on next opening' to fix the issue."
+    );
   }
+
 }
 
 void MapView::resizeGL (int width, int height)

src/noggit/MapView.h

@@ -140,6 +140,9 @@ private:
   bool  leftClicked = false;
   bool  rightMouse = false;
 
+  bool mmap_render_success = false;
+  int mmap_render_index = 0;
+
   // Vars for the ground editing toggle mode store the status of some
   // view settings when the ground editing mode is switched on to
   // restore them if switch back again

src/noggit/World.cpp

@@ -1861,11 +1861,6 @@ void World::drawMinimap ( MapTile *tile
     mcnk_shader.uniform("wireframe_color", wireframe_color);
 
     mcnk_shader.uniform("draw_fog", 0);
-    mcnk_shader.uniform("fog_color", math::vector_4d(skies->color_set[FOG_COLOR], 1));
-    // !\ todo use light dbcs values
-    mcnk_shader.uniform("fog_end", fogdistance);
-    mcnk_shader.uniform("fog_start", 0.5f);
-    mcnk_shader.uniform("camera", camera_pos);
 
     mcnk_shader.uniform("light_dir", terrain_light_dir);
     mcnk_shader.uniform("diffuse_color", diffuse_color);
@@ -1895,7 +1890,7 @@ void World::drawMinimap ( MapTile *tile
     tile_index m_tile = tile_index (camera_pos);
     m_tile.z -= 1;
 
-    bool unload = !mapIndex.tileLoaded(m_tile) && !mapIndex.tileAwaitingLoading(m_tile);
+    bool unload = !mapIndex.has_unsaved_changes(m_tile);
     MapTile* mTile = mapIndex.loadTile(m_tile);
 
     if (mTile)
@@ -1908,6 +1903,11 @@ void World::drawMinimap ( MapTile *tile
       );
     }
 
+    if (unload)
+    {
+      mapIndex.unloadTile(m_tile);
+    }
+
     gl.bindVertexArray(0);
     gl.bindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
   }
@@ -2049,7 +2049,7 @@ void World::saveMinimap (int width, int height)
 
 }
 
-void World::saveMinimap(int width, int height, tile_index const& tile_idx)
+bool World::saveMinimap(int width, int height, tile_index const& tile_idx)
 {
   // Setup framebuffer
   QOpenGLFramebufferObjectFormat fmt;
@@ -2065,7 +2065,7 @@ void World::saveMinimap(int width, int height, tile_index const& tile_idx)
   gl.clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
   // Load tile
-  bool unload = !mapIndex.tileLoaded(tile_idx) && !mapIndex.tileAwaitingLoading(tile_idx);
+  bool unload = !mapIndex.has_unsaved_changes(tile_idx);
   MapTile* mTile = mapIndex.loadTile(tile_idx);
 
   if (mTile)
@@ -2073,6 +2073,11 @@ void World::saveMinimap(int width, int height, tile_index const& tile_idx)
     mTile->wait_until_loaded();
     wait_for_all_tile_updates();
 
+    if (AsyncLoader::instance().is_loading())
+    {
+     return false;
+    }
+
     float max_height = getMaxTileHeight(tile_idx);
 
     // setup view matrices
@@ -2092,7 +2097,7 @@ void World::saveMinimap(int width, int height, tile_index const& tile_idx)
     drawMinimap(mTile, look_at.transposed(), projection.transposed(), math::vector_3d(TILESIZE * tile_idx.x + TILESIZE / 2.0f, max_height + 15.0f, TILESIZE * tile_idx.z + TILESIZE / 2.0f));
 
     QImage image = pixel_buffer.toImage();
-    image.save("/Users/sshumakov/Desktop/test_minimap.png");
+    image.save(("/Users/sshumakov/Desktop/MinimapGenTest/test_" + std::to_string(tile_idx.x) + "_" + std::to_string(tile_idx.z) + ".png").c_str());
 
     if (unload)
     {
@@ -2101,6 +2106,8 @@ void World::saveMinimap(int width, int height, tile_index const& tile_idx)
   }
 
   pixel_buffer.release();
+
+  return true;
 }
 
 void World::deleteModelInstance(int pUniqueID)

src/noggit/World.h

@@ -49,6 +49,8 @@ private:
   std::unordered_map<std::string, std::vector<ModelInstance*>> _models_by_filename;
   noggit::world_model_instances_storage _model_instance_storage;
   noggit::world_tile_update_queue _tile_update_queue;
+  std::mutex _guard;
+
 public:
   MapIndex mapIndex;
   noggit::map_horizon horizon;
@@ -261,7 +263,7 @@ public:
   void wait_for_all_tile_updates();
 
   void saveMinimap (int width, int height);
-  void saveMinimap (int width, int height, tile_index const& tile_idx);
+  bool saveMinimap (int width, int height, tile_index const& tile_idx);
   void drawMinimap ( MapTile *tile
       , math::matrix_4x4 const& model_view
       , math::matrix_4x4 const& projection