Colors erroneous when using RenderTarget2D in XNA

Question

I started creating a 2D sprite game for Windows using XNA. I'm not very experienced yet, but I'm learning. Let me start by using XNA game studio 3.1, I have not upgraded to 4.0 (yet).

What I'm trying to accomplish is to be able to draw all my sprites in a fixed-size buffer, which then, at the end of the rendering pass, scales to the size of the actual buffer, and then pulls on it. I'm not sure how multiple resolutions are usually supported, but this seemed like the right solution for me.

I tried to achieve this using the RenderTarget2D object to paint all my stuff, then pull out Texture2D and draw it for the buffer.

My code is as follows:

private RenderTarget2D RenderTarget;
private DepthStencilBuffer DepthStencilBufferRenderTarget;
private DepthStencilBuffer DepthStencilBufferOriginal;
private SpriteBatch SpriteBatch;

protected override void Initialize()
{
  base.Initialize();
  RenderTarget = new RenderTarget2D(GraphicsDevice, 1920, 1080, 1, SurfaceFormat.Single);

  DepthStencilBufferRenderTarget = new DepthStencilBuffer(GraphicsDevice, 
  1920, 1080, GraphicsDevice.DepthStencilBuffer.Format);

  DepthStencilBufferOriginal = GraphicsDevice.DepthStencilBuffer;
  SpriteBatch = new SpriteBatch(GraphicsDevice);
}

protected override void Draw(GameTime gameTime)
{
  GraphicsDevice.DepthStencilBuffer = DepthStencilBufferRenderTarget;
  GraphicsDevice.SetRenderTarget(0, RenderTarget);
  GraphicsDevice.Clear(Color.Black);

  SpriteBatch.Begin();
  //drawing all stuff here
  SpriteBatch.End();

  GraphicsDevice.DepthStencilBuffer = DepthStencilBufferOriginal;
  GraphicsDevice.SetRenderTarget(0, null);
  GraphicsDevice.Clear(Color.Black);
  Texture2D output = RenderTarget.GetTexture();

  SpriteBatch.Begin();
  Rectangle backbuffer = new Rectangle(0, 0, m_Options.DisplayWidth, m_Options.DisplayHeight);
  SpriteBatch.Draw(output, backbuffer, Color.White);
  SpriteBatch.End();

  base.Draw(gameTime);
}

, , , . , : - , ( , ) , RenderTarget2D.

- , ?

Answer 1

, , (). , SurfaceFormat RenderTarget2D. SurfaceFormat.Single, SurfaceFormat.Color.

, PresentationParameters GraphicsDevice RenderTarget:

GraphicsDevice.PresentationParameters.BackBufferFormat

, SurfaceFormat.Color. SurfaceFormat.Single SurfaceFormat.Color, , .