/Graphics/Basics/RenderToTexture.cs

using Delta.Engine.Dynamic;

using Delta.Utilities.Datatypes;



namespace Delta.Graphics.Basics

{

	/// <summary>

	/// Render To Texture class for rendering into textures. This is needed

	/// mostly for shadow mapping and post screen shader techniques.

	/// <para />

	/// You can use this class to extend render to texture functionality for all

	/// platforms. If you just change OpenTKRenderToTexture, your game will not

	/// be able to use that changes on any other graphic platform.

	/// </summary>

	public abstract class RenderToTexture : BaseRenderToTexture

	{

		#region Create (Static)

		/// <summary>

		/// Create render to texture instance dynamically.

		/// </summary>

		/// <param name="setPixelSize">Pixel size of the target texture</param>

		/// <param name="setIsDepthTexture">Should this be a depth texture?</param>

		/// <param name="setIsShadowProjected">

		/// Should this be used for projected shadow map texture techniques?

		/// </param>

		/// <param name="setUseStencilBuffer">

		/// Use the stencil flag for this RenderToTexture instance?

		/// </param>

		/// <returns>Created RenderToTexture instance</returns>

		public static RenderToTexture Create(Size setPixelSize,

			bool setIsDepthTexture = false, bool setIsShadowProjected = false,

			bool setUseStencilBuffer = false)

		{

			// Here we construct a string that will be send as parameter on 

			// RenderTexture implementation.

			RenderToTexture renderToTexture = Factory.Create<RenderToTexture>(

				new object[]

				{

					"RenderToTexture_" + (instanceNumber++),

					setPixelSize,

					setIsDepthTexture,

					setIsShadowProjected,

					setUseStencilBuffer

				});



			return renderToTexture;

		}

		#endregion



		#region Private



		#region instanceNumber (Private)

		/// <summary>

		/// Static integer value for generating unique name of every created

		/// RenderToTexure.

		/// </summary>

		private static int instanceNumber;

		#endregion



		#endregion



		#region Constructors

		/// <summary>

		/// Creates an instance of render to texture. Please note that calling

		/// Render will initialize this instance (with the

		/// MakeSureRenderTargetIsInitialized helper method), this constructor

		/// does nothing here yet.

		/// </summary>

		/// <param name="setTextureName">Name for the RenderToTexture</param>

		/// <param name="setPixelSize">Pixel size of the target texture</param>

		/// <param name="setIsDepthTexture">If set to <c>true</c> the texture

		/// target is a depth texture</param>

		/// <param name="setIsShadowProjected">If set to <c>true</c> the texture

		/// target is projected shadow texture to be used in shadow mapping.

		/// </param>

		/// <param name="setUseStencilBuffer">

		/// Use the stencil flag for this RenderToTexture instance?

		/// </param>

		public RenderToTexture(string setTextureName, Size setPixelSize,

			bool setIsDepthTexture, bool setIsShadowProjected,

			bool setUseStencilBuffer)

			: base(setTextureName, setPixelSize, setIsDepthTexture,

				setIsShadowProjected, setUseStencilBuffer)

		{

		}

		#endregion

	}

}