Converting between Texture2D and Image in XNA 4.0

In xna 4.0 we lost the FromFile property of the Texture2D and we gained FromStream, a more general method of input.

In this post I will present 2 little methods used on converting from a System.Drawing.Image to a Microsoft.Xna.Graphics.Texture2D and back again.

To convert a Texture2D to an Image :  

public static System.Drawing.Image Texture2Image(Texture2D texture)
{

  if (texture == null)

  {

      return null;

  }

 

  if (texture.IsDisposed)

  {

      return null;

  }

  //Memory stream to store the bitmap data.

  MemoryStream ms = new MemoryStream();

  //Save the texture to the stream.

  texture.SaveAsPng(ms, texture.Width, texture.Height);

  //Seek the beginning of the stream.

  ms.Seek(0, SeekOrigin.Begin);

  //Create an image from a stream.

  System.Drawing.Image bmp2 = System.Drawing.Bitmap.FromStream(ms);

  //Close the stream, we nolonger need it.

  ms.Close();

  ms = null;

  return bmp2;

}

To convert an Image to a Texture2D: 

public static void Image2Texture(System.Drawing.Image image, 
                                 GraphicsDevice graphics,
                                 ref Texture2D texture)
{

  if (image == null)

  {

      return;

  }

  if (texture == null || texture.IsDisposed ||

      texture.Width != image.Width ||

      texture.Height != image.Height ||

      texture.Format != SurfaceFormat.Color)

  {

   if (texture != null && !texture.IsDisposed)

   {

          texture.Dispose();

   }

   texture = new Texture2D(graphics,image.Width,image.Height,false,SurfaceFormat.Color);

  }

  else

  {

      for (int i = 0; i < 16; i++)

      {

          if (graphics.Textures[i] == texture)

          {

              graphics.Textures[i] = null;

              break;

          }

      }

  }

  //Memory stream to store the bitmap data.

  MemoryStream ms = new MemoryStream();

  //Save to that memory stream.

  image.Save(ms, System.Drawing.Imaging.ImageFormat.Png);

  //Go to the beginning of the memory stream.

  ms.Seek(0, SeekOrigin.Begin);

 

  //Fill the texture.

  texture = Texture2D.FromStream(graphics, ms, image.Width, image.Height, false);

  //Close the stream.

  ms.Close(); 

  ms = null;

}

This methods can be handy when you are building an editor that is using both XNA and WindowsForms(GDI+)

Here is a link, it's on SkyDrive so if you have an account and you are not logged in you might not see it :

Image2Texture2D