Add configurable custom window icon

src/main/java/meteordevelopment/meteorclient/systems/config/Config.java

@@ -12,6 +12,7 @@
 import meteordevelopment.meteorclient.systems.System;
 import meteordevelopment.meteorclient.systems.Systems;
 import meteordevelopment.meteorclient.systems.modules.Module;
+import meteordevelopment.meteorclient.utils.misc.IconChanger;
 import meteordevelopment.meteorclient.utils.render.color.SettingColor;
 import net.minecraft.nbt.NbtCompound;
 import net.minecraft.nbt.NbtElement;
@@ -71,6 +72,15 @@ public class Config extends System<Config> {
         .build()
     );
 
+    @SuppressWarnings("unused")
+    public final Setting<IconChanger.WindowIcons> customWindowIcon = sgVisual.add(new EnumSetting.Builder<IconChanger.WindowIcons>()
+        .name("custom-window-icon")
+        .description("The icon to use for the window.")
+        .defaultValue(IconChanger.WindowIcons.Default)
+        .onChanged(IconChanger::setIcon)
+        .build()
+    );
+
     public final Setting<Boolean> customWindowTitle = sgVisual.add(new BoolSetting.Builder()
         .name("custom-window-title")
         .description("Show custom text in the window title.")

src/main/java/meteordevelopment/meteorclient/utils/misc/IconChanger.java

@@ -0,0 +1,113 @@
+/*
+ * This file is part of the Meteor Client distribution (https://github.com/MeteorDevelopment/meteor-client).
+ * Copyright (c) Meteor Development.
+ */
+
+package meteordevelopment.meteorclient.utils.misc;
+
+import meteordevelopment.meteorclient.MeteorClient;
+import net.minecraft.SharedConstants;
+import net.minecraft.client.texture.NativeImage;
+import net.minecraft.client.util.Icons;
+import net.minecraft.resource.Resource;
+import net.minecraft.util.Identifier;
+import org.lwjgl.glfw.GLFW;
+import org.lwjgl.glfw.GLFWImage;
+import org.lwjgl.system.MemoryStack;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+
+import static meteordevelopment.meteorclient.MeteorClient.mc;
+
+public class IconChanger {
+    private IconChanger() {
+    }
+
+    public enum WindowIcons {
+        Meteor(
+            MeteorClient.identifier("textures/icons/windowicon/meteor_16.png"),
+            MeteorClient.identifier("textures/icons/windowicon/meteor_32.png")
+        ),
+        Christmas(
+            MeteorClient.identifier("textures/icons/windowicon/christmas_16.png"),
+            MeteorClient.identifier("textures/icons/windowicon/christmas_32.png")
+        ),
+        Halloween(
+            MeteorClient.identifier("textures/icons/windowicon/halloween_16.png"),
+            MeteorClient.identifier("textures/icons/windowicon/halloween_32.png")
+        ),
+        Default(null, null);
+
+        public final Identifier icon16;
+        public final Identifier icon32;
+
+        WindowIcons(Identifier icon16, Identifier icon32) {
+            this.icon16 = icon16;
+            this.icon32 = icon32;
+        }
+    }
+
+    public static void setIcon(WindowIcons icon) {
+        if (icon == WindowIcons.Default) {
+            resetToDefault();
+        } else if (icon.icon16 == null || icon.icon32 == null) {
+            MeteorClient.LOG.warn("Icon paths cannot be null for custom icons");
+        } else {
+            setCustomIcon(icon);
+        }
+    }
+
+    private static void resetToDefault() {
+        try {
+            mc.getWindow().setIcon(
+                mc.getDefaultResourcePack(),
+                SharedConstants.getGameVersion().stable() ? Icons.RELEASE : Icons.SNAPSHOT
+            );
+        } catch (IOException e) {
+            MeteorClient.LOG.warn("Failed to reset icon: {}", e.getMessage());
+        }
+    }
+
+    private static void setCustomIcon(WindowIcons windowIcons) {
+        try (MemoryStack stack = MemoryStack.stackPush()) {
+            GLFWImage.Buffer icons = GLFWImage.malloc(2, stack);
+
+            loadIconSize(windowIcons.icon16, icons, 0, stack);
+            loadIconSize(windowIcons.icon32, icons, 1, stack);
+
+            GLFW.glfwSetWindowIcon(mc.getWindow().getHandle(), icons);
+        } catch (Exception e) {
+            MeteorClient.LOG.warn("Failed to set icon: {}", e.getMessage());
+        }
+    }
+
+    private static void loadIconSize(Identifier iconPath, GLFWImage.Buffer icons, int index, MemoryStack stack) throws IOException {
+        Resource resource = mc.getResourceManager()
+            .getResource(iconPath)
+            .orElseThrow(() -> new IOException("Icon not found: " + iconPath));
+
+        try (NativeImage image = NativeImage.read(resource.getInputStream())) {
+            ByteBuffer pixelBuffer = imageToByteBuffer(image);
+
+            GLFWImage glfwImage = GLFWImage.malloc(stack);
+            glfwImage.set(image.getWidth(), image.getHeight(), pixelBuffer);
+            icons.put(index, glfwImage);
+        }
+    }
+
+    private static ByteBuffer imageToByteBuffer(NativeImage image) {
+        ByteBuffer buffer = ByteBuffer.allocateDirect(image.getWidth() * image.getHeight() * 4);
+        for (int y = 0; y < image.getHeight(); y++) {
+            for (int x = 0; x < image.getWidth(); x++) {
+                int pixel = image.getColorArgb(x, y);
+                buffer.put((byte) ((pixel >> 16) & 0xFF)); // Red
+                buffer.put((byte) ((pixel >> 8) & 0xFF));  // Green
+                buffer.put((byte) (pixel & 0xFF));         // Blue
+                buffer.put((byte) ((pixel >> 24) & 0xFF)); // Alpha
+            }
+        }
+        buffer.flip();
+        return buffer;
+    }
+}