Unity 透明窗口

最新推荐文章于 2025-05-07 16:11:44 发布

原创最新推荐文章于 2025-05-07 16:11:44 发布 · 1.4k 阅读

2 ·

CC 4.0 BY-SA版权

文章标签：

#unity

unity 专栏收录该内容

187 篇文章

订阅专栏

这篇博客介绍了一个Unity脚本，通过C#调用Windows API实现了窗口透明化和点击穿透功能。用户按下Q键可以使窗口变为全透明，E键则取消透明效果。脚本使用了DllImport特性导入user32.dll和Dwmapi.dll库，设置窗口样式和扩展帧区域来达到效果。


using System;
using System.Runtime.InteropServices;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class TransparentWindow : MonoBehaviour {

    [DllImport("user32.dll")]
    public static extern int MessageBox(IntPtr hWnd, string text, string caption, uint type);

    [DllImport("user32.dll")]
    private static extern IntPtr GetActiveWindow();

    [DllImport("user32.dll")]
    private static extern int SetWindowLong(IntPtr hWnd, int nIndex, uint dwNewLong);

    [DllImport("user32.dll", SetLastError = true)]
    static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags);

    [DllImport("user32.dll")]
    static extern int SetLayeredWindowAttributes(IntPtr hwnd, uint crKey, byte bAlpha, uint dwFlags);

    private struct MARGINS {
        public int cxLeftWidth;
        public int cxRightWidth;
        public int cyTopHeight;
        public int cyBottomHeight;
    }

    [DllImport("Dwmapi.dll")]
    private static extern uint DwmExtendFrameIntoClientArea(IntPtr hWnd, ref MARGINS margins);

    const int GWL_EXSTYLE = -20;

    const uint WS_EX_LAYERED = 0x00080000;
    const uint WS_EX_TRANSPARENT = 0x00000020;

    static readonly IntPtr HWND_TOPMOST = new IntPtr(-1);

    const uint LWA_COLORKEY = 0x00000001;

    private IntPtr hWnd;

    private void Start() {

#if !UNITY_EDITOR
        hWnd = GetActiveWindow();

        MARGINS margins = new MARGINS { cxLeftWidth = -1 };
        DwmExtendFrameIntoClientArea(hWnd, ref margins);

        SetWindowLong(hWnd, GWL_EXSTYLE, WS_EX_LAYERED | WS_EX_TRANSPARENT);
        //SetLayeredWindowAttributes(hWnd, 0, 0, LWA_COLORKEY);

        SetWindowPos(hWnd, HWND_TOPMOST, 0, 0, 0, 0, 0);
#endif

    }

    private void Update() {

        if (Input.GetKeyDown(KeyCode.Q))
        {
            hWnd = GetActiveWindow();

            MARGINS margins = new MARGINS { cxLeftWidth = -1 };
            DwmExtendFrameIntoClientArea(hWnd, ref margins);
        }
        if (Input.GetKeyDown(KeyCode.E))
        {
            hWnd = GetActiveWindow();

            MARGINS margins = new MARGINS { cxLeftWidth = 0 };
            DwmExtendFrameIntoClientArea(hWnd, ref margins);
        }
        SetClickthrough(true);
    }

    private void SetClickthrough(bool clickthrough) {
        if (clickthrough) {
            SetWindowLong(hWnd, GWL_EXSTYLE, WS_EX_LAYERED | WS_EX_TRANSPARENT);
        } else {
            SetWindowLong(hWnd, GWL_EXSTYLE, WS_EX_LAYERED);
        }
    }
}

https://forum.unity.com/threads/solved-windows-transparent-window-with-opaque-contents-lwa_colorkey.323057/