koobas.hobune.stream
How to get a player's desktop background and use it in the game?
So I'm working on trying to make a computer in my game similar to that of the player's desktop. I'm trying to get the player's background image and turn it into an image I can use. Does anyone know how to do that? For reference to what I am doing it is similar to that in PC Building Simulator or When the Darkness comes.
Based on this forum thread to know how to retrieve the path to the current desktop image + the documentation, I wrote the following code
Note that this code I've been tested on Windows only, in the editor.
For testing purpose, I've just put the wallpaper into a raw image, but you can do whatever you want with the resulting Texture2D.
using System;
using System.Runtime.InteropServices;
using UnityEngine;
using UnityEngine.UI;
public class Wallpaper : MonoBehaviour
{
public RawImage RawImage;
private const UInt32 SPI_GETDESKWALLPAPER = 0x73;
private const int MAX_PATH = 260;
[DllImport( "user32.dll", CharSet = CharSet.Auto )]
private static extern int SystemParametersInfo( UInt32 uAction, int uParam, string lpvParam, int fuWinIni );
void Start()
{
RawImage.texture = LoadTextureFromPath( GetCurrentDesktopWallpaperPath() );
}
private Texture2D LoadTextureFromPath( string path )
{
Texture2D texture = new Texture2D(2,2);
texture.LoadImage( System.IO.File.ReadAllBytes( path ) );
return texture;
}
private string GetCurrentDesktopWallpaperPath()
{
string currentWallpaper = new string('\0', MAX_PATH);
SystemParametersInfo( SPI_GETDESKWALLPAPER, currentWallpaper.Length, currentWallpaper, 0 );
return currentWallpaper.Substring( 0, currentWallpaper.IndexOf( '\0' ) );
}
}
Another way to get the path to the wallpaper is to retrieve it from the Windows registry, I don't know which way is better. (Credits to NICK RUSSLER )
using UnityEngine;
using UnityEngine.UI;
public class Wallpaper : MonoBehaviour
{
public RawImage RawImage;
void Start()
{
RawImage.texture = LoadTextureFromPath( GetCurrentDesktopWallpaperPath() );
}
private Texture2D LoadTextureFromPath( string path )
{
Debug.Log( path );
Texture2D texture = new Texture2D(2,2);
texture.LoadImage( System.IO.File.ReadAllBytes( path ) );
return texture;
}
private string GetCurrentDesktopWallpaperPath()
{
byte[] path = Microsoft.Win32.Registry.CurrentUser.OpenSubKey(@"Control Panel\Desktop").GetValue( "TranscodedImageCache" ) as byte[];
return System.Text.Encoding.Unicode.GetString(SliceByteArray(path, 24)).TrimEnd("\0".ToCharArray());
}
private static byte[] SliceByteArray( byte[] input, int index )
{
byte[] output = new byte[input.Length - index];
System.Array.Copy( input, index, output, 0, output.Length );
return output;
}
}
