Fix players not showing up

Skins still need some work as it applies to every player online rather than a specific player; however, players are now visible regardless.

connector/src/main/java/org/geysermc/connector/utils/ProvidedSkin.java

@@ -3,6 +3,7 @@ package org.geysermc.connector.utils;
 import lombok.Getter;
 
 import javax.imageio.ImageIO;
+import java.awt.Color;
 import java.awt.image.BufferedImage;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
@@ -18,11 +19,11 @@ public class ProvidedSkin {
             try {
                 for (int y = 0; y < image.getHeight(); y++) {
                     for (int x = 0; x < image.getWidth(); x++) {
-                        int rgba = image.getRGB(x, y);
-                        outputStream.write((rgba >> 16) & 0xFF);
-                        outputStream.write((rgba >> 8) & 0xFF);
-                        outputStream.write(rgba & 0xFF);
-                        outputStream.write((rgba >> 24) & 0xFF);
+                        Color color = new Color(image.getRGB(x, y), true);
+                        outputStream.write(color.getRed());
+                        outputStream.write(color.getGreen());
+                        outputStream.write(color.getBlue());
+                        outputStream.write(color.getAlpha());
                     }
                 }
                 image.flush();

connector/src/main/java/org/geysermc/connector/utils/SkinUtils.java

@@ -13,6 +13,7 @@ import org.geysermc.connector.entity.PlayerEntity;
 import org.geysermc.connector.network.session.GeyserSession;
 
 import java.util.Base64;
+import java.util.Collections;
 import java.util.UUID;
 import java.util.function.Consumer;
 
@@ -48,7 +49,16 @@ public class SkinUtils {
     public static PlayerListPacket.Entry buildEntryManually(UUID uuid, String username, long geyserId,
                                                             String skinId, byte[] skinData, byte[] capeData,
                                                             String geometryName, String geometryData) {
-        SerializedSkin serializedSkin = SerializedSkin.of(skinId, ImageData.of(64, 64, skinData), ImageData.of(64, 32, capeData), geometryName, geometryData, true);
+        if (skinData == null || skinData.length == 0) {
+            skinData = SkinProvider.EMPTY_SKIN.getSkinData();
+        }
+
+        if (capeData == null || capeData.length == 0) {
+            capeData = SkinProvider.EMPTY_CAPE.getCapeData();
+        }
+
+        SerializedSkin serializedSkin = SerializedSkin.of(skinId, geometryName, ImageData.of(64, 64, skinData),
+                Collections.emptyList(), ImageData.of(64, 32, capeData), geometryData, "", true, false, false, "", "");
 
         PlayerListPacket.Entry entry = new PlayerListPacket.Entry(uuid);
         entry.setName(username);