sprite items + tetragons format update

src/frontend/hud.cpp

@@ -184,7 +184,7 @@ HudRenderer::HudRenderer(Engine* engine, LevelFrontend* frontend)
     auto content = level->content;
     auto indices = content->indices;
     std::vector<itemid_t> items;
-    for (itemid_t id = 0; id < indices->countItemDefs(); id++) {
+    for (itemid_t id = 1; id < indices->countItemDefs(); id++) {
         items.push_back(id);
     }
     contentAccess.reset(new InventoryView(8, content, frontend, items));
@@ -275,8 +275,7 @@ void HudRenderer::draw(const GfxContext& ctx){
 	batch->color = vec4(1.0f);
 	batch->render();
 
-    auto blocksPreview = frontend->getBlocksPreview();
-	blocksPreview->begin(&ctx.getViewport());
+
 	{
 		Window::clearDepth();
 		GfxContext subctx = ctx.sub();
@@ -285,13 +284,34 @@ void HudRenderer::draw(const GfxContext& ctx){
         
         ItemDef* item = contentIds->getItemDef(player->chosenItem);
         switch (item->iconType) {
+            case item_icon_type::none:
+                break;
             case item_icon_type::block: {
                 Block* cblock = content->findBlock(item->icon);
                 assert(cblock != nullptr);
+                
+                auto blocksPreview = frontend->getBlocksPreview();
+	            blocksPreview->begin(&ctx.getViewport());
 		        blocksPreview->draw(cblock, width - 56, uicamera->getFov() - 56, 48, vec4(1.0f));
                 break;
             }
-            // TODO: handle other types
+            case item_icon_type::sprite: {
+                size_t index = item->icon.find(':');
+                std::string name = item->icon.substr(index+1);
+                UVRegion region(0.0f, 0.0, 1.0f, 1.0f);
+                if (index == std::string::npos) {
+                    batch->texture(assets->getTexture(name));
+                } else {
+                    std::string atlasname = item->icon.substr(0, index);
+                    Atlas* atlas = assets->getAtlas(atlasname);
+                    if (atlas && atlas->has(name)) {
+                        region = atlas->get(name);
+                        batch->texture(atlas->getTexture());
+                    }
+                }
+                batch->rect(width - 56, uicamera->getFov() - 56, 48, 48, 0, 0, 0, region, false, true, glm::vec4(1.0f));
+                batch->render();
+            }
         }
 	}
 	uishader->use();