mirror of
https://github.com/Astatin3/MC-server-icon.git
synced 2026-06-09 00:28:05 -06:00
Make the mod work
This commit is contained in:
Michael Mikovsky
@@ -0,0 +1,333 @@
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package dev.astatin3.favicon;
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import com.mojang.brigadier.arguments.StringArgumentType;
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import net.fabricmc.api.ModInitializer;
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import net.fabricmc.fabric.api.command.v2.CommandRegistrationCallback;
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import net.minecraft.command.argument.TextArgumentType;
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import net.minecraft.component.DataComponentTypes;
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import net.minecraft.component.type.MapIdComponent;
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import net.minecraft.item.Item;
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import net.minecraft.item.ItemStack;
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import net.minecraft.item.map.MapState;
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import net.minecraft.server.MinecraftServer;
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import net.minecraft.server.ServerMetadata;
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import net.minecraft.server.command.CommandManager;
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import net.minecraft.server.network.ServerPlayerEntity;
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import net.minecraft.text.Text;
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import org.apache.commons.io.FileUtils;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import javax.imageio.ImageIO;
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import java.awt.*;
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import java.awt.image.BufferedImage;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.nio.file.Path;
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import java.util.Objects;
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import java.util.Optional;
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import static net.minecraft.server.command.CommandManager.literal;
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public class ExampleMod implements ModInitializer {
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public static final String MOD_ID = "favicon";
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// This logger is used to write text to the console and the log file.
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// It is considered best practice to use your mod id as the logger's name.
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// That way, it's clear which mod wrote info, warnings, and errors.
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public static final Logger LOGGER = LoggerFactory.getLogger(MOD_ID);
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@Override
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public void onInitialize() {
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// This code runs as soon as Minecraft is in a mod-load-ready state.
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// However, some things (like resources) may still be uninitialized.
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// Proceed with mild caution.
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// LOGGER.info("Hello Fabric world!");
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CommandRegistrationCallback.EVENT.register((dispatcher, registryAccess, environment) -> dispatcher.register(literal("favicon")
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.executes(context -> {
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// For versions below 1.19, replace "Text.literal" with "new LiteralText".
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// For versions below 1.20, remode "() ->" directly.
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ServerPlayerEntity player = context.getSource().getPlayer();
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ItemStack mainHandStack = player.getMainHandStack();
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if(mainHandStack == null) {
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context.getSource().sendFeedback(() -> Text.literal("Error getting held item"), false);
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return 1;
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}
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Item item = mainHandStack.getItem();
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if(!Objects.equals(item.toString(), "minecraft:filled_map")) {
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context.getSource().sendFeedback(() -> Text.literal("Invalid held item. You must be holding a Filled Map"), false);
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return 1;
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}
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MapIdComponent mapIdComponent = mainHandStack.get(DataComponentTypes.MAP_ID);
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MapState mapState = player.getWorld().getMapState(mapIdComponent);
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if(mapState == null) {
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context.getSource().sendFeedback(() -> Text.literal("Error getting map data"), false);
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return 1;
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}
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MinecraftServer server = player.getServer();
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ServerMetadata metadata = server.getServerMetadata();
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if(metadata == null) {
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context.getSource().sendFeedback(() -> Text.literal("Error getting server metadata"), false);
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return 1;
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}
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context.getSource().sendFeedback(() -> Text.literal("Encoding icon data..."), false);
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// for (int y = 0; y < 64; y++) {
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// String text = "";
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// for (int x = 0; x < 64; x++) {
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// text += mapState.colors[y * 128 + x] + ", ";
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// }
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// String finalText = text;
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// context.getSource().sendFeedback(() -> Text.literal(finalText), false);
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// }
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BufferedImage bufImg = convertImage(mapState.colors);
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byte[] favicon = toBytes(bufImg);
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if(favicon == null) {
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context.getSource().sendFeedback(() -> Text.literal("Error encoding icon"), false);
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return 1;
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}
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context.getSource().sendFeedback(() -> Text.literal("Setting current server icon..."), false);
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ServerMetadata newMetadata = new ServerMetadata(
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metadata.description(),
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metadata.players(),
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metadata.version(),
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Optional.of(new ServerMetadata.Favicon(favicon)),
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metadata.secureChatEnforced()
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);
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((MetadataAccessor) server).setServerMetadata(newMetadata);
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context.getSource().sendFeedback(() -> Text.literal("Saving new icon file..."), false);
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Path iconpath = server.getPath("server-icon.png");
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try {
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FileUtils.writeByteArrayToFile(iconpath.toFile(), favicon);
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} catch (IOException e) {
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throw new RuntimeException(e);
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}
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context.getSource().sendFeedback(() -> Text.literal("Done!"), false);
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context.getSource().sendFeedback(() -> Text.literal("Current icon: " + server.getServerMetadata().favicon().get().iconBytes().length + " bytes"), false);
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return 1;
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})));
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// CommandRegistrationCallback.EVENT.register((dispatcher, registryAccess, environment) -> dispatcher.register(literal("motd")
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// .then(CommandManager.argument("MOTD", StringArgumentType.greedyString())
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// .executes(context -> {
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//
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// ServerPlayerEntity player = context.getSource().getPlayer();
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// MinecraftServer server = player.getServer();
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// ServerMetadata metadata = server.getServerMetadata();
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//
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// if(metadata == null) {
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// context.getSource().sendFeedback(() -> Text.literal("Error getting server metadata"), false);
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// return 1;
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// }
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//
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// context.getSource().sendFeedback(() -> Text.literal("Setting server metadata..."), false);
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// context.getSource().sendFeedback(() -> Text.literal("Preview:"), false);
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//
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// String motdText = StringArgumentType.getString(context, "MOTD");
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// Text motd = Text.of(motdText);
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//
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// context.getSource().sendFeedback(() -> motd, false);
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//
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// ServerMetadata newMetadata = new ServerMetadata(
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// motd,
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// metadata.players(),
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// metadata.version(),
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// metadata.favicon(),
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// metadata.secureChatEnforced()
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// );
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//
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// ((MetadataAccessor) server).setServerMetadata(newMetadata);
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//
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//
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// return 1;
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// }))));
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}
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private BufferedImage convertImage(byte[] mapBytes) {
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if (mapBytes.length != 16384) {
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throw new IllegalArgumentException("Image data must be exactly 16384 bytes (128x128)");
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}
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// Create cropped image data (64x64 = 4096 bytes)
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// byte[] croppedData = new byte[64 * 64];
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BufferedImage bufferedImage = new BufferedImage(64, 64, BufferedImage.TYPE_INT_RGB);
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// Copy top-left 64x64 quadrant
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for (int y = 0; y < 64; y++) {
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for (int x = 0; x < 64; x++) {
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bufferedImage.setRGB(x, y, mapByteToColor(mapBytes[y * 128 + x]));
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}
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}
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return bufferedImage;
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}
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private byte[] toBytes(BufferedImage bufferedImage) {
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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try {
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ImageIO.write(bufferedImage, "PNG", baos);
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} catch (Exception e) {
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return null;
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}
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return baos.toByteArray();
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}
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// https://minecraft.wiki/w/Map_item_format
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private static final int[][] BASE_COLORS = {
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{0, 0, 0}, // 0: None/Transparent
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{127, 178, 56}, // 1: Grass
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{247, 233, 163}, // 2: Sand
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{199, 199, 199}, // 3: Wool
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{255, 0, 0}, // 4: Fire
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{160, 160, 255}, // 5: Ice
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{167, 167, 167}, // 6: Metal
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{0, 124, 0}, // 7: Plant
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{255, 255, 255}, // 8: Snow
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{164, 168, 184}, // 9: Clay
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{151, 109, 77}, // 10: Dirt
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{112, 112, 112}, // 11: Stone
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{64, 64, 255}, // 12: Water
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{143, 119, 72}, // 13: Wood
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{255, 252, 245}, // 14: Quartz
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{216, 127, 51}, // 15: Color Orange
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{178, 76, 216}, // 16: Color Magenta
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{102, 153, 216}, // 17: Color Light Blue
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{229, 229, 51}, // 18: Color Yellow
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{127, 204, 25}, // 19: Color Light Green
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{242, 127, 165}, // 20: Color Pink
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{76, 76, 76}, // 21: Color Gray
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{153, 153, 153}, // 22: Color Light Gray
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{76, 127, 153}, // 23: Color Cyan
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{127, 63, 178}, // 24: Color Purple
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{51, 76, 178}, // 25: Color Blue
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{102, 76, 51}, // 26: Color Brown
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{102, 127, 51}, // 27: Color Green
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{153, 51, 51}, // 28: Color Red
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{25, 25, 25}, // 29: Color Black
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{250, 238, 77}, // 30: Gold
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{92, 219, 213}, // 31: Diamond
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{74, 128, 255}, // 32: Lapis
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{0, 217, 58}, // 33: Emerald
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{129, 86, 49}, // 34: Podzol
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{112, 2, 0}, // 35: Nether
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{209, 177, 161}, // 36: Terracotta White
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{159, 82, 36}, // 37: Terracotta Orange
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{149, 87, 108}, // 38: Terracotta Magenta
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{112, 108, 138}, // 39: Terracotta Light Blue
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{186, 133, 36}, // 40: Terracotta Yellow
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{103, 117, 53}, // 41: Terracotta Light Green
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{160, 77, 78}, // 42: Terracotta Pink
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{57, 41, 35}, // 43: Terracotta Gray
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{135, 107, 98}, // 44: Terracotta Light Gray
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{87, 92, 92}, // 45: Terracotta Cyan
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{122, 73, 88}, // 46: Terracotta Purple
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{76, 62, 92}, // 47: Terracotta Blue
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{76, 50, 35}, // 48: Terracotta Brown
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{76, 82, 42}, // 49: Terracotta Green
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{142, 60, 46}, // 50: Terracotta Red
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{37, 22, 16}, // 51: Terracotta Black
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{189, 48, 49}, // 52: Crimson Nylium
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{148, 63, 97}, // 53: Crimson Stem
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{92, 25, 29}, // 54: Crimson Hyphae
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{22, 126, 134}, // 55: Warped Nylium
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{58, 142, 140}, // 56: Warped Stem
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{86, 44, 62}, // 57: Warped Hyphae
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{20, 180, 133}, // 58: Warped Wart Block
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{100, 100, 100}, // 59: Deepslate
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{216, 175, 147}, // 60: Raw Iron
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{127, 167, 150} // 61: Glow Lichen
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};
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// Brightness multipliers for each shade level
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private static final double[] BRIGHTNESS_MULTIPLIERS = {
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180.0 / 255.0, // 0: Darkest
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220.0 / 255.0, // 1: Dark
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255.0 / 255.0, // 2: Normal (brightest)
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135.0 / 255.0 // 3: Very dark
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};
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public static int mapByteToColor(byte mapByte) {
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int unsignedByte = mapByte & 0xFF;
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// Color ID 0 is transparent
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if (unsignedByte == 0) {
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return 0;
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}
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// Decode base color and brightness level
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int baseColorIndex = (unsignedByte - 1) / 4;
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int brightnessLevel = (unsignedByte - 1) % 4;
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// Validate base color index
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if (baseColorIndex < 0 || baseColorIndex >= BASE_COLORS.length) {
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return 0; // Return transparent for invalid colors
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}
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// Get base color RGB values
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int[] baseRgb = BASE_COLORS[baseColorIndex];
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double multiplier = BRIGHTNESS_MULTIPLIERS[brightnessLevel];
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// Apply brightness multiplier
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int r = (int) Math.round(baseRgb[0] * multiplier);
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int g = (int) Math.round(baseRgb[1] * multiplier);
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int b = (int) Math.round(baseRgb[2] * multiplier);
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// Clamp values to 0-255 range
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r = Math.max(0, Math.min(255, r));
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g = Math.max(0, Math.min(255, g));
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b = Math.max(0, Math.min(255, b));
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// Combine into single RGB integer
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return (r << 16) | (g << 8) | b;
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}
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// public static int convertRgbByteToInt(byte rgbByte) {
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// // Convert byte to unsigned int (0-255 range)
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// int unsignedByte = rgbByte & 0xFF;
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//
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// // Extract the color components using bit masks and shifts
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// int r = (unsignedByte >> 5) & 0x07; // Get top 3 bits (RRR)
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// int g = (unsignedByte >> 2) & 0x07; // Get middle 3 bits (GGG)
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// int b = unsignedByte & 0x03; // Get bottom 2 bits (BB)
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//
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// // Scale the values to full 8-bit range (0-255)
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// // 3 bits (0-7) -> 8 bits (0-255): multiply by 255/7 ≈ 36.43
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// // 2 bits (0-3) -> 8 bits (0-255): multiply by 255/3 = 85
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// r = (r * 255) / 7; // Scale 3-bit to 8-bit
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// g = (g * 255) / 7; // Scale 3-bit to 8-bit
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// b = (b * 255) / 3; // Scale 2-bit to 8-bit
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//
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// // Combine into ARGB format: 0xAARRGGBB
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// // Alpha = 255 (0xFF), fully opaque
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// int argb = (255 << 24) | (r << 16) | (g << 8) | b;
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//
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// return argb;
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// }
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}
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