Add inventory crafting.

assets/cubyz/recipes/wood_recipes

@@ -1,33 +1,20 @@
 L = cubyz:oak_log
 T = cubyz:oak_top
 P = cubyz:oak_planks
-S = cubyz:stick
 C = cubyz:coal
 
-shapeless
 L
 result 4*P
 
-shapeless
 T
 result 3*P
 
-shaped
-P P
-P P
+4*P
 result cubyz:workbench
 
-shaped
-P
-P
-result 4*S
-
-shaped
 C
-S
+P
 result 8*cubyz:torch
 
-shaped
-S P S
-S P S
-result 6*cubyz:oak_fence
+P
+result 2*cubyz:oak_fence

src/assets.zig

@@ -42,8 +42,30 @@ pub fn readAllJsonFilesInAddons(externalAllocator: Allocator, addons: std.ArrayL
 		}
 	}
 }
+/// Reads text files recursively from all subfolders.
+pub fn readAllFilesInAddons(externalAllocator: Allocator, addons: std.ArrayList(std.fs.Dir), subPath: []const u8, output: *std.ArrayList([]const u8)) !void {
+	for(addons.items) |addon| {
+		var dir: std.fs.IterableDir = addon.openIterableDir(subPath, .{}) catch |err| {
+			if(err == error.FileNotFound) continue;
+			return err;
+		};
+		defer dir.close();
 
-pub fn readAssets(externalAllocator: Allocator, assetPath: []const u8, blocks: *std.StringHashMap(JsonElement), items: *std.StringHashMap(JsonElement), biomes: *std.StringHashMap(JsonElement)) !void {
+		var walker = try dir.walk(main.threadAllocator);
+		defer walker.deinit();
+
+		while(try walker.next()) |entry| {
+			if(entry.kind == .File) {
+				var file = try dir.dir.openFile(entry.path, .{});
+				defer file.close();
+				const string = try file.readToEndAlloc(externalAllocator, std.math.maxInt(usize));
+				try output.append(string);
+			}
+		}
+	}
+}
+
+pub fn readAssets(externalAllocator: Allocator, assetPath: []const u8, blocks: *std.StringHashMap(JsonElement), items: *std.StringHashMap(JsonElement), biomes: *std.StringHashMap(JsonElement), recipes: *std.ArrayList([]const u8)) !void {
 	var addons = std.ArrayList(std.fs.Dir).init(main.threadAllocator);
 	defer addons.deinit();
 	var addonNames = std.ArrayList([]const u8).init(main.threadAllocator);
@@ -68,6 +90,7 @@ pub fn readAssets(externalAllocator: Allocator, assetPath: []const u8, blocks: *
 	try readAllJsonFilesInAddons(externalAllocator, addons, addonNames, "blocks", blocks);
 	try readAllJsonFilesInAddons(externalAllocator, addons, addonNames, "items", items);
 	try readAllJsonFilesInAddons(externalAllocator, addons, addonNames, "biomes", biomes);
+	try readAllFilesInAddons(externalAllocator, addons, "recipes", recipes);
 }
 
 pub fn init() !void {
@@ -78,7 +101,7 @@ pub fn init() !void {
 	commonBiomes = std.StringHashMap(JsonElement).init(arenaAllocator);
 	commonRecipes = std.ArrayList([]const u8).init(arenaAllocator);
 
-	try readAssets(arenaAllocator, "assets/", &commonBlocks, &commonItems, &commonBiomes);
+	try readAssets(arenaAllocator, "assets/", &commonBlocks, &commonItems, &commonBiomes, &commonRecipes);
 }
 
 fn registerItem(assetFolder: []const u8, id: []const u8, json: JsonElement) !*items_zig.BaseItem {
@@ -120,6 +143,10 @@ fn registerBlock(assetFolder: []const u8, id: []const u8, json: JsonElement) !vo
 //		}
 }
 
+fn registerRecipesFromFile(file: []const u8) !void {
+	try items_zig.registerRecipes(file);
+}
+
 pub const BlockPalette = struct {
 	palette: std.ArrayList([]const u8),
 	pub fn init(allocator: Allocator, json: JsonElement) !*BlockPalette {
@@ -181,8 +208,11 @@ pub fn loadWorldAssets(assetFolder: []const u8, palette: *BlockPalette) !void {
 	defer items.clearAndFree();
 	var biomes = try commonBiomes.cloneWithAllocator(main.threadAllocator);
 	defer biomes.clearAndFree();
+	var recipes = std.ArrayList([]const u8).init(main.threadAllocator);
+	try recipes.appendSlice(commonRecipes.items);
+	defer recipes.clearAndFree();
 
-	try readAssets(arenaAllocator, assetFolder, &blocks, &items, &biomes);
+	try readAssets(arenaAllocator, assetFolder, &blocks, &items, &biomes, &recipes);
 
 	// blocks:
 	var block: u32 = 0;
@@ -218,6 +248,10 @@ pub fn loadWorldAssets(assetFolder: []const u8, palette: *BlockPalette) !void {
 	// block drops:
 	try blocks_zig.registerBlockDrops(blocks);
 
+	for(recipes.items) |recipe| {
+		try registerRecipesFromFile(recipe);
+	}
+
 //	public void registerBlocks(Registry<DataOrientedRegistry> registries, NoIDRegistry<Ore> oreRegistry, BlockPalette palette) {
 //		HashMap<Resource, JsonObject> perWorldBlocks = new HashMap<>(commonBlocks);
 //		readAllJsonObjects("blocks", (json, id) -> {
@@ -406,129 +440,4 @@ pub fn deinit() void {
 //		missingDropsItem.clear();
 //		missingDropsAmount.clear();
 //	}
-//
-//	public void readRecipes(ArrayList<String[]> recipesList) {
-//		SimpleList<String> lines = new SimpleList<>(new String[1024]);
-//		for (File addon : addons) {
-//			File recipes = new File(addon, "recipes");
-//			if (recipes.exists()) {
-//				for (File file : recipes.listFiles()) {
-//					if (file.isDirectory()) continue;
-//					lines.clear();
-//					try {
-//						BufferedReader buf = new BufferedReader(new FileReader(file, StandardCharsets.UTF_8));
-//						String line;
-//						while ((line = buf.readLine())!= null) {
-//							line = line.replaceAll("//.*", ""); // Ignore comments with "//".
-//							line = line.trim(); // Remove whitespaces before and after the word starts.
-//							if (line.isEmpty()) continue;
-//							lines.add(line);
-//						}
-//						buf.close();
-//					} catch(IOException e) {
-//						Logger.error(e);
-//					}
-//					recipesList.add(lines.toArray());
-//				}
-//			}
-//		}
-//	}
-//
-//	private void registerRecipe(String[] recipe, NoIDRegistry<Recipe> recipeRegistry, Registry<Item> itemRegistry) {
-//		HashMap<String, Item> shortCuts = new HashMap<>();
-//		ArrayList<Item> items = new ArrayList<>();
-//		IntSimpleList itemsPerRow = new IntSimpleList(8);
-//		boolean shaped = false;
-//		boolean startedRecipe = false;
-//		for(int i = 0; i < recipe.length; i++) {
-//			String line = recipe[i];
-//			// shortcuts:
-//			if (line.contains("=")) {
-//				String[] parts = line.split("=");
-//				Item item = itemRegistry.getByID(parts[1].replaceAll("\\s", ""));
-//				if (item == null) {
-//					Logger.warning("Skipping unknown item \"" + parts[1].replaceAll("\\s", "") + "\" in recipe parsing.");
-//				} else {
-//					shortCuts.put(parts[0].replaceAll("\\s", ""), itemRegistry.getByID(parts[1].replaceAll("\\s", ""))); // Remove all whitespaces, wherever they might be. Not necessarily the most robust way, but it should work.
-//				}
-//			} else if (line.startsWith("shaped")) {
-//				// Start of a shaped pattern
-//				shaped = true;
-//				startedRecipe = true;
-//				items.clear();
-//				itemsPerRow.clear();
-//			} else if (line.startsWith("shapeless")) {
-//				// Start of a shapeless pattern
-//				shaped = false;
-//				startedRecipe = true;
-//				items.clear();
-//				itemsPerRow.clear();
-//			} else if (line.startsWith("result") && startedRecipe && !itemsPerRow.isEmpty()) {
-//				// Parse the result, which is made up of `amount*shortcut`.
-//				startedRecipe = false;
-//				String result = line.substring(6).replaceAll("\\s", ""); // Remove "result" and all space-likes.
-//				int number = 1;
-//				if (result.contains("*")) {
-//					String[] parts = result.split("\\*");
-//					result = parts[1];
-//					number = Integer.parseInt(parts[0]);
-//				}
-//				Item item;
-//				if (shortCuts.containsKey(result)) {
-//					item = shortCuts.get(result);
-//				} else {
-//					item = itemRegistry.getByID(result);
-//				}
-//				if (item == null) {
-//					Logger.warning("Skipping recipe with unknown item \"" + result + "\" in recipe parsing.");
-//				} else {
-//					if (shaped) {
-//						int x = CubyzMath.max(itemsPerRow);
-//						int y = itemsPerRow.size;
-//						Item[] array = new Item[x*y];
-//						int index = 0;
-//						for(int iy = 0; iy < itemsPerRow.size; iy++) {
-//							for(int ix = 0; ix < itemsPerRow.array[iy]; ix++) {
-//								array[iy*x + ix] = items.get(index);
-//								index++;
-//							}
-//						}
-//						recipeRegistry.register(new Recipe(x, y, array, number, item));
-//					} else {
-//						recipeRegistry.register(new Recipe(items.toArray(new Item[0]), number, item));
-//					}
-//				}
-//			} else if (startedRecipe) {
-//				// Parse the actual recipe:
-//				String[] words = line.split("\\s+"); // Split into sections that are divided by any number of whitespace characters.
-//				itemsPerRow.add(words.length);
-//				for(int j = 0; j < words.length; j++) {
-//					Item item;
-//					if (words[j].equals("0")) {
-//						item = null;
-//					} else if (shortCuts.containsKey(words[j])) {
-//						item = shortCuts.get(words[j]);
-//					} else {
-//						item = itemRegistry.getByID(words[j]);
-//						if (item == null) {
-//							startedRecipe = false; // Skip unknown recipes.
-//							Logger.warning("Skipping recipe with unknown item \"" + words[j] + "\" in recipe parsing.");
-//						}
-//					}
-//					items.add(item);
-//				}
-//			}
-//		}
-//	}
-//	
-//	public void registerRecipes(NoIDRegistry<Recipe> recipeRegistry, Registry<Item> itemRegistry) {
-//		for(String[] recipe : commonRecipes) {
-//			registerRecipe(recipe, recipeRegistry, itemRegistry);
-//		}
-//		ArrayList<String[]> worldSpecificRecipes = new ArrayList<>();
-//		readRecipes(worldSpecificRecipes);
-//		for(String[] recipe : worldSpecificRecipes) {
-//			registerRecipe(recipe, recipeRegistry, itemRegistry);
-//		}
-//	}
 //}

src/gui/components/CraftingResultSlot.zig

@@ -0,0 +1,110 @@
+const std = @import("std");
+const Allocator = std.mem.Allocator;
+
+const main = @import("root");
+const ItemStack = main.items.ItemStack;
+const graphics = main.graphics;
+const draw = graphics.draw;
+const Texture = graphics.Texture;
+const TextBuffer = graphics.TextBuffer;
+const vec = main.vec;
+const Vec2f = vec.Vec2f;
+
+const gui = @import("../gui.zig");
+const GuiComponent = gui.GuiComponent;
+
+const CraftingResultSlot = @This();
+
+var texture: Texture = undefined;
+const border: f32 = 3;
+
+pos: Vec2f,
+size: Vec2f = .{32 + 2*border, 32 + 2*border},
+itemStack: ItemStack,
+text: TextBuffer,
+textSize: Vec2f = .{0, 0},
+onTake: *const fn(usize) bool,
+userData: usize,
+hovered: bool = false,
+pressed: bool = false,
+
+pub fn __init() !void {
+	texture = try Texture.initFromFile("assets/cubyz/ui/inventory/crafting_result_slot.png");
+}
+
+pub fn __deinit() void {
+	texture.deinit();
+}
+
+pub fn init(pos: Vec2f, itemStack: ItemStack, onTake: *const fn(usize) bool, userData: usize) Allocator.Error!*CraftingResultSlot {
+	std.debug.assert(itemStack.item != null);
+	const self = try gui.allocator.create(CraftingResultSlot);
+	var buf: [16]u8 = undefined;
+	self.* = CraftingResultSlot {
+		.itemStack = itemStack,
+		.pos = pos,
+		.text = try TextBuffer.init(gui.allocator, std.fmt.bufPrint(&buf, "{}", .{self.itemStack.amount}) catch "∞", .{}, false, .right),
+		.onTake = onTake,
+		.userData = userData,
+	};
+	self.textSize = try self.text.calculateLineBreaks(8, self.size[0] - 2*border);
+	return self;
+}
+
+pub fn deinit(self: *const CraftingResultSlot) void {
+	self.text.deinit();
+	gui.allocator.destroy(self);
+}
+
+pub fn toComponent(self: *CraftingResultSlot) GuiComponent {
+	return GuiComponent{
+		.craftingResultSlot = self
+	};
+}
+
+pub fn updateHovered(self: *CraftingResultSlot, _: Vec2f) void {
+	self.hovered = true;
+	gui.hoveredCraftingSlot = self;
+}
+
+pub fn mainButtonPressed(self: *CraftingResultSlot, _: Vec2f) void {
+	self.pressed = true;
+}
+
+pub fn mainButtonReleased(self: *CraftingResultSlot, mousePosition: Vec2f) void {
+	if(self.pressed) {
+		self.pressed = false;
+		if(GuiComponent.contains(self.pos, self.size, mousePosition)) {
+			if(gui.inventory.carriedItemStack.item == null or std.meta.eql(self.itemStack.item, gui.inventory.carriedItemStack.item)) {
+				if(std.math.add(u16, gui.inventory.carriedItemStack.amount, self.itemStack.amount) catch null) |nextAmount| if(nextAmount <= self.itemStack.item.?.stackSize()) {
+					if(self.onTake(self.userData)) {
+						gui.inventory.carriedItemStack.item = self.itemStack.item;
+						gui.inventory.carriedItemStack.amount += self.itemStack.amount;
+					}
+				};
+			}
+		}
+	}
+}
+
+pub fn render(self: *CraftingResultSlot, _: Vec2f) !void {
+	draw.setColor(0xffffffff);
+	texture.bindTo(0);
+	draw.boundImage(self.pos, self.size);
+	if(self.itemStack.item) |item| {
+		const itemTexture = try item.getTexture();
+		itemTexture.bindTo(0);
+		draw.boundImage(self.pos + @splat(2, border), self.size - @splat(2, 2*border));
+		if(self.itemStack.amount != 1) {
+			try self.text.render(self.pos[0] + self.size[0] - self.textSize[0] - border, self.pos[1] + self.size[1] - self.textSize[1] - border, 8);
+		}
+	}
+	if(self.pressed) {
+		draw.setColor(0x80808080);
+		draw.rect(self.pos, self.size);
+	} else if(self.hovered) {
+		self.hovered = false;
+		draw.setColor(0x300000ff);
+		draw.rect(self.pos, self.size);
+	}
+}

src/gui/components/Icon.zig

@@ -0,0 +1,48 @@
+const std = @import("std");
+const Allocator = std.mem.Allocator;
+
+const main = @import("root");
+const graphics = main.graphics;
+const draw = graphics.draw;
+const Texture = graphics.Texture;
+const vec = main.vec;
+const Vec2f = vec.Vec2f;
+
+const gui = @import("../gui.zig");
+const GuiComponent = gui.GuiComponent;
+
+const Icon = @This();
+
+const fontSize: f32 = 16;
+
+pos: Vec2f,
+size: Vec2f,
+texture: Texture,
+
+pub fn init(pos: Vec2f, size: Vec2f, texture: Texture) Allocator.Error!*Icon {
+	const self = try gui.allocator.create(Icon);
+	self.* = Icon {
+		.texture = texture,
+		.pos = pos,
+		.size = size,
+	};
+	return self;
+}
+
+pub fn deinit(self: *const Icon) void {
+	gui.allocator.destroy(self);
+}
+
+pub fn toComponent(self: *Icon) GuiComponent {
+	return GuiComponent {
+		.icon = self
+	};
+}
+
+pub fn updateTexture(self: *Icon, newTexture: Texture) !void {
+	self.texture = newTexture;
+}
+
+pub fn render(self: *Icon, _: Vec2f) !void {
+	self.texture.render(self.pos, self.size);
+}

src/gui/components/ImmutableItemSlot.zig

@@ -0,0 +1,70 @@
+const std = @import("std");
+const Allocator = std.mem.Allocator;
+
+const main = @import("root");
+const BaseItem = main.items.BaseItem;
+const graphics = main.graphics;
+const draw = graphics.draw;
+const Texture = graphics.Texture;
+const TextBuffer = graphics.TextBuffer;
+const vec = main.vec;
+const Vec2f = vec.Vec2f;
+
+const gui = @import("../gui.zig");
+const GuiComponent = gui.GuiComponent;
+
+const ImmutableItemSlot = @This();
+
+var texture: Texture = undefined;
+const border: f32 = 3;
+
+pos: Vec2f,
+size: Vec2f = .{32 + 2*border, 32 + 2*border},
+item: *BaseItem,
+amount: u32,
+text: TextBuffer,
+textSize: Vec2f = .{0, 0},
+
+pub fn __init() !void {
+	texture = try Texture.initFromFile("assets/cubyz/ui/inventory/immutable_slot.png");
+}
+
+pub fn __deinit() void {
+	texture.deinit();
+}
+
+pub fn init(pos: Vec2f, item: *BaseItem, amount: u32) Allocator.Error!*ImmutableItemSlot {
+	const self = try gui.allocator.create(ImmutableItemSlot);
+	var buf: [16]u8 = undefined;
+	self.* = ImmutableItemSlot {
+		.item = item,
+		.amount = amount,
+		.pos = pos,
+		.text = try TextBuffer.init(gui.allocator, std.fmt.bufPrint(&buf, "{}", .{amount}) catch "∞", .{}, false, .right),
+	};
+	self.textSize = try self.text.calculateLineBreaks(8, self.size[0] - 2*border);
+	return self;
+}
+
+pub fn deinit(self: *const ImmutableItemSlot) void {
+	self.text.deinit();
+	gui.allocator.destroy(self);
+}
+
+pub fn toComponent(self: *ImmutableItemSlot) GuiComponent {
+	return GuiComponent{
+		.immutableItemSlot = self
+	};
+}
+
+pub fn render(self: *ImmutableItemSlot, _: Vec2f) !void {
+	draw.setColor(0xffffffff);
+	texture.bindTo(0);
+	draw.boundImage(self.pos, self.size);
+	const itemTexture = try self.item.getTexture();
+	itemTexture.bindTo(0);
+	draw.boundImage(self.pos + @splat(2, border), self.size - @splat(2, 2*border));
+	if(self.amount != 1) {
+		try self.text.render(self.pos[0] + self.size[0] - self.textSize[0] - border, self.pos[1] + self.size[1] - self.textSize[1] - border, 8);
+	}
+}

src/gui/gui.zig

@@ -11,6 +11,8 @@ const Vec2f = vec.Vec2f;
 
 const Button = @import("components/Button.zig");
 const CheckBox = @import("components/CheckBox.zig");
+const CraftingResultSlot = @import("components/CraftingResultSlot.zig");
+const ImmutableItemSlot = @import("components/ImmutableItemSlot.zig");
 const ItemSlot = @import("components/ItemSlot.zig");
 const ScrollBar = @import("components/ScrollBar.zig");
 const Slider = @import("components/Slider.zig");
@@ -25,12 +27,14 @@ var hudWindows: std.ArrayList(*GuiWindow) = undefined;
 pub var openWindows: std.ArrayList(*GuiWindow) = undefined;
 pub var selectedWindow: ?*GuiWindow = null; // TODO: Make private.
 pub var selectedTextInput: ?*TextInput = null;
+var hoveredAWindow: bool = false;
 
 pub var allocator: Allocator = undefined;
 
 pub var scale: f32 = undefined;
 
 pub var hoveredItemSlot: ?*ItemSlot = null;
+pub var hoveredCraftingSlot: ?*CraftingResultSlot = null;
 
 pub fn init(_allocator: Allocator) !void {
 	allocator = _allocator;
@@ -53,6 +57,8 @@ pub fn init(_allocator: Allocator) !void {
 	try GuiWindow.__init();
 	try Button.__init();
 	try CheckBox.__init();
+	try CraftingResultSlot.__init();
+	try ImmutableItemSlot.__init();
 	try ItemSlot.__init();
 	try ScrollBar.__init();
 	try Slider.__init();
@@ -74,6 +80,8 @@ pub fn deinit() void {
 	GuiWindow.__deinit();
 	Button.__deinit();
 	CheckBox.__deinit();
+	CraftingResultSlot.__deinit();
+	ImmutableItemSlot.__deinit();
 	ItemSlot.__deinit();
 	ScrollBar.__deinit();
 	Slider.__deinit();
@@ -352,7 +360,12 @@ pub fn mainButtonPressed() void {
 	inventory.update() catch |err| {
 		std.log.err("Encountered error while updating inventory: {s}", .{@errorName(err)});
 	};
-	if(inventory.carriedItemStack.amount != 0) return;
+	if(inventory.carriedItemStack.amount != 0) {
+		if(hoveredCraftingSlot) |hovered| {
+			hovered.mainButtonPressed(undefined);
+		}
+		return;
+	}
 	selectedWindow = null;
 	selectedTextInput = null;
 	var selectedI: usize = 0;
@@ -423,17 +436,20 @@ pub fn updateWindowPositions() void {
 
 pub fn updateAndRenderGui() !void {
 	const mousePos = main.Window.getMousePosition()/@splat(2, scale);
+	hoveredAWindow = false;
 	if(!main.Window.grabbed) {
 		if(selectedWindow) |selected| {
 			try selected.updateSelected(mousePos);
 		}
 		hoveredItemSlot = null;
+		hoveredCraftingSlot = null;
 		var i: usize = openWindows.items.len;
 		while(i != 0) {
 			i -= 1;
 			const window: *GuiWindow = openWindows.items[i];
 			if(GuiComponent.contains(window.pos, window.size, mousePos)) {
 				try window.updateHovered(mousePos);
+				hoveredAWindow = true;
 				break;
 			}
 		}
@@ -450,9 +466,9 @@ pub fn updateAndRenderGui() !void {
 	try inventory.render(mousePos);
 }
 
-const inventory = struct {
+pub const inventory = struct {
 	const ItemStack = main.items.ItemStack;
-	var carriedItemStack: ItemStack = .{.item = null, .amount = 0};
+	pub var carriedItemStack: ItemStack = .{.item = null, .amount = 0};
 	var carriedItemSlot: *ItemSlot = undefined;
 	var deliveredItemStacks: std.ArrayList(*ItemStack) = undefined;
 	var deliveredItemStacksOldAmount: std.ArrayList(u16) = undefined;
@@ -547,7 +563,7 @@ const inventory = struct {
 					}
 				}
 			}
-		} else {
+		} else if(!hoveredAWindow) {
 			if(leftClick or carriedItemStack.amount == 1) {
 				main.network.Protocols.genericUpdate.itemStackDrop(main.game.world.?.conn, carriedItemStack, vec.floatCast(f32, main.game.Player.getPosBlocking()), main.game.camera.direction, 20) catch |err| {
 					std.log.err("Error while dropping itemStack: {s}", .{@errorName(err)});

src/gui/gui_component.zig

@@ -8,19 +8,25 @@ pub const GuiComponent = union(enum) {
 
 	pub const Button = @import("components/Button.zig");
 	pub const CheckBox = @import("components/CheckBox.zig");
+	pub const CraftingResultSlot = @import("components/CraftingResultSlot.zig");
 	pub const HorizontalList = @import("components/HorizontalList.zig");
+	pub const Icon = @import("components/Icon.zig");
+	pub const ImmutableItemSlot = @import("components/ImmutableItemSlot.zig");
 	pub const ItemSlot = @import("components/ItemSlot.zig");
 	pub const Label = @import("components/Label.zig");
 	pub const MutexComponent = @import("components/MutexComponent.zig");
-	pub const Slider = @import("components/Slider.zig");
 	pub const ScrollBar = @import("components/ScrollBar.zig");
+	pub const Slider = @import("components/Slider.zig");
 	pub const TextInput = @import("components/TextInput.zig");
 	pub const VerticalList = @import("components/VerticalList.zig");
 
 
 	button: *Button,
 	checkBox: *CheckBox,
+	craftingResultSlot: *CraftingResultSlot,
 	horizontalList: *HorizontalList,
+	icon: *Icon,
+	immutableItemSlot: *ImmutableItemSlot,
 	itemSlot: *ItemSlot,
 	label: *Label,
 	mutexComponent: *MutexComponent,

src/gui/windows/_windowlist.zig

@@ -8,6 +8,7 @@ pub const graphics = @import("graphics.zig");
 pub const healthbar = @import("healthbar.zig");
 pub const hotbar = @import("hotbar.zig");
 pub const inventory = @import("inventory.zig");
+pub const inventory_crafting = @import("inventory_crafting.zig");
 pub const main = @import("main.zig");
 pub const multiplayer = @import("multiplayer.zig");
 pub const settings = @import("settings.zig");

src/gui/windows/inventory.zig

@@ -8,6 +8,7 @@ const Vec2f = main.vec.Vec2f;
 const gui = @import("../gui.zig");
 const GuiComponent = gui.GuiComponent;
 const GuiWindow = gui.GuiWindow;
+const Button = GuiComponent.Button;
 const HorizontalList = GuiComponent.HorizontalList;
 const VerticalList = GuiComponent.VerticalList;
 const ItemSlot = GuiComponent.ItemSlot;
@@ -19,15 +20,20 @@ pub var window = GuiWindow {
 };
 
 const padding: f32 = 8;
-
 pub fn onOpen() Allocator.Error!void {
 	var list = try VerticalList.init(.{padding, padding + 16}, 300, 0);
-	// TODO: Crafting.
+	// Some miscellanious slots and buttons:
+	// TODO: armor slots, backpack slot + stack-based backpack inventory, other items maybe?
+	{
+		var row = try HorizontalList.init();
+		try row.add(try Button.init(.{0, 0}, 64, "Crafting", gui.openWindowFunction("cubyz:inventory_crafting"))); // TODO: Replace the text with an icon
+		try list.add(row);
+	}
 	// Inventory:
 	for(1..4) |y| {
 		var row = try HorizontalList.init();
 		for(0..8) |x| {
-			try row.add(try ItemSlot.init(.{0, 0}, &Player.inventory__SEND_CHANGES_TO_SERVER.items[y*8 + x]));
+			try row.add(try ItemSlot.init(.{0, 0}, &Player.inventory__SEND_CHANGES_TO_SERVER.items[y*8 + x])); // TODO: Update server
 		}
 		try list.add(row);
 	}

src/gui/windows/inventory_crafting.zig

@@ -0,0 +1,173 @@
+const std = @import("std");
+const Allocator = std.mem.Allocator;
+
+const main = @import("root");
+const items = main.items;
+const BaseItem = items.BaseItem;
+const ItemStack = items.ItemStack;
+const Player = main.game.Player;
+const Texture = main.graphics.Texture;
+const Vec2f = main.vec.Vec2f;
+
+const gui = @import("../gui.zig");
+const GuiComponent = gui.GuiComponent;
+const GuiWindow = gui.GuiWindow;
+const Button = GuiComponent.Button;
+const HorizontalList = GuiComponent.HorizontalList;
+const VerticalList = GuiComponent.VerticalList;
+const Icon = GuiComponent.Icon;
+const CraftingResultSlot = GuiComponent.CraftingResultSlot;
+const ImmutableItemSlot = GuiComponent.ImmutableItemSlot;
+
+pub var window = GuiWindow {
+	.contentSize = Vec2f{64*8, 64*4},
+	.title = "Crafting",
+	.id = "cubyz:inventory_crafting",
+};
+
+const padding: f32 = 8;
+
+var availableItems: std.ArrayList(*BaseItem) = undefined;
+var itemAmount: std.ArrayList(u32) = undefined;
+
+var arrowTexture: Texture = undefined;
+var recipeResult: ItemStack = undefined;
+
+pub fn init() !void {
+	arrowTexture = try Texture.initFromFile("assets/cubyz/ui/inventory/crafting_arrow.png");
+}
+
+pub fn deinit() void {
+	arrowTexture.deinit();
+}
+
+fn addItemStackToAvailable(itemStack: ItemStack) Allocator.Error!void {
+	if(itemStack.item) |item| {
+		if(item == .baseItem) {
+			const baseItem = item.baseItem;
+			for(availableItems.items, 0..) |alreadyPresent, i| {
+				if(baseItem == alreadyPresent) {
+					itemAmount.items[i] += itemStack.amount;
+					return;
+				}
+			}
+			try availableItems.append(baseItem);
+			try itemAmount.append(itemStack.amount);
+		}
+	}
+}
+
+fn onTake(recipeIndex: usize) bool {
+	const recipe = items.recipes()[recipeIndex];
+	for(recipe.sourceItems, recipe.sourceAmounts) |item, _amount| {
+		var amount: u32 = _amount;
+		for(main.game.Player.inventory__SEND_CHANGES_TO_SERVER.items) |*itemStack| {
+			if(itemStack.item) |invItem| {
+				if(invItem == .baseItem and invItem.baseItem == item) {
+					if(amount >= itemStack.amount) {
+						amount -= itemStack.amount;
+						itemStack.clear();
+					} else {
+						itemStack.amount -= @intCast(u16, amount);
+						amount = 0;
+					}
+					if(amount == 0) break;
+				}
+			}
+		}
+		if(amount != 0) {
+			std.log.warn("Congratulations, you just managed to cheat {}*{s}, thanks to my lazy coding. Have fun with that :D", .{amount, item.id});
+		}
+	}
+	return true;
+}
+
+fn findAvailableRecipes(list: *VerticalList) Allocator.Error!bool {
+	const oldAmounts = try main.threadAllocator.dupe(u32, itemAmount.items);
+	defer main.threadAllocator.free(oldAmounts);
+	for(itemAmount.items) |*amount| {
+		amount.* = 0;
+	}
+	// Figure out what items are available in the inventory:
+	for(main.game.Player.inventory__SEND_CHANGES_TO_SERVER.items) |itemStack| {
+		try addItemStackToAvailable(itemStack);
+	}
+	try addItemStackToAvailable(gui.inventory.carriedItemStack);
+	if(std.mem.eql(u32, oldAmounts, itemAmount.items)) return false;
+	// Remove no longer present items:
+	var i: u32 = 0;
+	while(i < availableItems.items.len) : (i += 1) {
+		if(itemAmount.items[i] == 0) {
+			_ = itemAmount.swapRemove(i);
+			_ = availableItems.swapRemove(i);
+		}
+	}
+	// Find all recipes the player can make:
+	outer: for(items.recipes(), 0..) |*recipe, recipeIndex| {
+		middle: for(recipe.sourceItems, recipe.sourceAmounts) |sourceItem, sourceAmount| {
+			for(availableItems.items, itemAmount.items) |availableItem, availableAmount| {
+				if(availableItem == sourceItem and availableAmount >= sourceAmount) {
+					continue :middle;
+				}
+			}
+			continue :outer; // Ingredient not found.
+		}
+		// All ingredients found: Add it to the list.
+		var rowList = try HorizontalList.init();
+		const maxColumns: u32 = 4;
+		const itemsPerColumn = recipe.sourceItems.len/maxColumns;
+		const remainder = recipe.sourceItems.len%maxColumns;
+		i = 0;
+		for(0..maxColumns) |col| {
+			var itemsThisColumn = itemsPerColumn;
+			if(col < remainder) itemsThisColumn += 1;
+			var columnList = try VerticalList.init(.{0, 0}, std.math.inf(f32), 0);
+			for(0..itemsThisColumn) |_| {
+				try columnList.add(try ImmutableItemSlot.init(.{0, 0}, recipe.sourceItems[i], recipe.sourceAmounts[i]));
+				i += 1;
+			}
+			columnList.finish(.center);
+			try rowList.add(columnList);
+		}
+		try rowList.add(try Icon.init(.{8, 0}, .{32, 32}, arrowTexture));
+		const itemSlot = try CraftingResultSlot.init(.{8, 0}, recipe.resultItem, &onTake, recipeIndex);
+		try rowList.add(itemSlot);
+		rowList.finish(.{0, 0}, .center);
+		try list.add(rowList);
+	}
+	return true;
+}
+
+fn refresh() Allocator.Error!void {
+	var list = try VerticalList.init(.{padding, padding + 16}, 300, 8);
+	if(!try findAvailableRecipes(list)) {
+		list.deinit();
+		return;
+	}
+	if(window.rootComponent) |*comp| {
+		comp.deinit();
+	}
+	list.finish(.center);
+	window.rootComponent = list.toComponent();
+	window.contentSize = window.rootComponent.?.pos() + window.rootComponent.?.size() + @splat(2, padding);
+	gui.updateWindowPositions();
+}
+
+pub fn onOpen() Allocator.Error!void {
+	availableItems = std.ArrayList(*BaseItem).init(main.globalAllocator);
+	itemAmount = std.ArrayList(u32).init(main.globalAllocator);
+	try refresh();
+}
+
+pub fn onClose() void {
+	if(window.rootComponent) |*comp| {
+		comp.deinit();
+		window.rootComponent = null;
+	}
+	availableItems.deinit();
+	itemAmount.deinit();
+}
+
+pub fn update() Allocator.Error!void {
+	try refresh();
+}

src/items.zig

@@ -79,6 +79,17 @@ pub const BaseItem = struct {
 	block: ?u16,
 	foodValue: f32, // TODO: Effects.
 
+	var unobtainable = BaseItem {
+		.image = graphics.Image.defaultImage,
+		.texture = null,
+		.id = "unobtainable",
+		.name = "unobtainable",
+		.stackSize = 0,
+		.material = null,
+		.block = null,
+		.foodValue = 0,
+	};
+
 	fn init(self: *BaseItem, allocator: Allocator, texturePath: []const u8, replacementTexturePath: []const u8, id: []const u8, json: JsonElement) !void {
 		self.id = try allocator.dupe(u8, id);
 		if(texturePath.len == 0) {
@@ -113,7 +124,7 @@ pub const BaseItem = struct {
 		return hash;
 	}
 
-	fn getTexture(self: *BaseItem) !graphics.Texture {
+	pub fn getTexture(self: *BaseItem) !graphics.Texture {
 		if(self.texture == null) {
 			if(self.block) |blockType| {
 				const c = graphics.c;
@@ -1344,18 +1355,31 @@ pub const Inventory = struct {
 	}
 };
 
+const Recipe = struct {
+	sourceItems: []*BaseItem,
+	sourceAmounts: []u32,
+	resultItem: ItemStack,
+};
+
 var arena: std.heap.ArenaAllocator = undefined;
 var reverseIndices: std.StringHashMap(*BaseItem) = undefined;
 var itemList: [65536]BaseItem = undefined;
 var itemListSize: u16 = 0;
 
+var recipeList: std.ArrayList(Recipe) = undefined;
+
 pub fn iterator() std.StringHashMap(*BaseItem).ValueIterator {
 	return reverseIndices.valueIterator();
 }
 
+pub fn recipes() []Recipe {
+	return recipeList.items;
+}
+
 pub fn globalInit() void {
 	arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
 	reverseIndices = std.StringHashMap(*BaseItem).init(arena.allocator());
+	recipeList = std.ArrayList(Recipe).init(arena.allocator());
 	itemListSize = 0;
 }
 
@@ -1371,8 +1395,83 @@ pub fn register(_: []const u8, texturePath: []const u8, replacementTexturePath:
 	return newItem;
 }
 
+pub fn registerRecipes(file: []const u8) !void {
+	var shortcuts = std.StringHashMap(*BaseItem).init(main.threadAllocator);
+	defer shortcuts.deinit();
+	defer {
+		var keyIterator = shortcuts.keyIterator();
+		while(keyIterator.next()) |key| {
+			main.threadAllocator.free(key.*);
+		}
+	}
+	var items = std.ArrayList(*BaseItem).init(main.threadAllocator);
+	defer items.deinit();
+	var itemAmounts = std.ArrayList(u32).init(main.threadAllocator);
+	defer itemAmounts.deinit();
+	var string = std.ArrayList(u8).init(main.threadAllocator);
+	defer string.deinit();
+	var lines = std.mem.split(u8, file, "\n");
+	while(lines.next()) |line| {
+		// shortcuts:
+		if(std.mem.containsAtLeast(u8, line, 1, "=")) {
+			var parts = std.mem.split(u8, line, "=");
+			for(parts.first()) |char| {
+				if(std.ascii.isWhitespace(char)) continue; // TODO: Unicode whitespaces
+				try string.append(char);
+			}
+			const shortcut = try string.toOwnedSlice();
+			const id = std.mem.trim(u8, parts.rest(), &std.ascii.whitespace); // TODO: Unicode whitespaces
+			const item = getByID(id) orelse shortcuts.get(id) orelse &BaseItem.unobtainable;
+			try shortcuts.put(shortcut, item);
+		} else if(std.mem.startsWith(u8, line, "result") and items.items.len != 0) {
+			defer items.clearAndFree();
+			defer itemAmounts.clearAndFree();
+			var id = line["result".len..];
+			var amount: u16 = 1;
+			if(std.mem.containsAtLeast(u8, id, 1, "*")) {
+				var parts = std.mem.split(u8, id, "*");
+				const amountString = std.mem.trim(u8, parts.first(), &std.ascii.whitespace); // TODO: Unicode whitespaces
+				amount = std.fmt.parseInt(u16, amountString, 0) catch 1;
+				id = parts.rest();
+			}
+			id = std.mem.trim(u8, id, &std.ascii.whitespace); // TODO: Unicode whitespaces
+			const item = getByID(id) orelse shortcuts.get(id) orelse continue;
+			const recipe = Recipe {
+				.sourceItems = try arena.allocator().dupe(*BaseItem, items.items),
+				.sourceAmounts = try arena.allocator().dupe(u32, itemAmounts.items),
+				.resultItem = ItemStack{.item = Item{.baseItem = item}, .amount = amount},
+			};
+			try recipeList.append(recipe);
+		} else {
+			var ingredients = std.mem.split(u8, line, ",");
+			outer: while(ingredients.next()) |ingredient| {
+				var id = ingredient;
+				var amount: u16 = 1;
+				if(std.mem.containsAtLeast(u8, id, 1, "*")) {
+					var parts = std.mem.split(u8, id, "*");
+					const amountString = std.mem.trim(u8, parts.first(), &std.ascii.whitespace); // TODO: Unicode whitespaces
+					amount = std.fmt.parseInt(u16, amountString, 0) catch 1;
+					id = parts.rest();
+				}
+				id = std.mem.trim(u8, id, &std.ascii.whitespace); // TODO: Unicode whitespaces
+				const item = getByID(id) orelse shortcuts.get(id) orelse continue;
+				// Resolve duplicates:
+				for(items.items, 0..) |presentItem, i| {
+					if(presentItem == item) {
+						itemAmounts.items[i] += amount;
+						continue :outer;
+					}
+				}
+				try items.append(item);
+				try itemAmounts.append(amount);
+			}
+		}
+	}
+}
+
 pub fn reset() void {
 	reverseIndices.clearAndFree();
+	recipeList.clearAndFree();
 	itemListSize = 0;
 	// TODO: Use arena.reset() instead.
 	arena.deinit();
@@ -1381,6 +1480,7 @@ pub fn reset() void {
 
 pub fn deinit() void {
 	reverseIndices.clearAndFree();
+	recipeList.clearAndFree();
 	arena.deinit();
 }