96 lines
No EOL
3.8 KiB
C#
96 lines
No EOL
3.8 KiB
C#
#region usings
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using System;
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using OpenTK.Graphics.OpenGL4;
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using SM.OGL.Texture;
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#endregion
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namespace SM.OGL.Framebuffer
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{
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/// <summary>
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/// Represents a Framebuffer-Color Attachment.
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/// <para>Can be use like a texture.</para>
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/// </summary>
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public class ColorAttachment : TextureBase
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{
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private int _multisamples;
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/// <summary>
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/// The ID the attachment was given.
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/// </summary>
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public int AttachmentID { get; }
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/// <summary>
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/// Returns the <see cref="OpenTK.Graphics.OpenGL4.FramebufferAttachment"/> of this ColorAttachment.
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/// </summary>
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public FramebufferAttachment FramebufferAttachment => FramebufferAttachment.ColorAttachment0 + AttachmentID;
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/// <summary>
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/// Returns the <see cref="OpenTK.Graphics.OpenGL4.DrawBufferMode"/> of this ColorAttachment.
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/// </summary>
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public DrawBufferMode DrawBufferMode => DrawBufferMode.ColorAttachment0 + AttachmentID;
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/// <summary>
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/// Returns the <see cref="OpenTK.Graphics.OpenGL4.ReadBufferMode"/> of this ColorAttachment.
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/// </summary>
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public ReadBufferMode ReadBufferMode => ReadBufferMode.ColorAttachment0 + AttachmentID;
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/// <summary>
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/// Returns the <see cref="OpenTK.Graphics.OpenGL4.DrawBuffersEnum"/> of this ColorAttachment.
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/// </summary>
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public DrawBuffersEnum DrawBuffersEnum => DrawBuffersEnum.ColorAttachment0 + AttachmentID;
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public bool IsMultisampled => _multisamples > 0;
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/// <summary>
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/// Creates a attachment with a specific id.
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/// </summary>
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/// <param name="attachmentId"></param>
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public ColorAttachment(int attachmentId) : this(attachmentId, PixelInformation.RGBA_LDR)
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{ }
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public ColorAttachment(int attachmentID, PixelInformation pixelInformation, int multisamples = 0)
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{
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AttachmentID = attachmentID;
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PixelInformation = pixelInformation;
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_multisamples = multisamples;
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Target = IsMultisampled ? TextureTarget.Texture2DMultisample : TextureTarget.Texture2D;
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}
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/// <summary>
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/// Generates the attachment.
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/// </summary>
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/// <param name="f"></param>
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public void Generate(Framebuffer f)
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{
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_id = GL.GenTexture();
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if (IsMultisampled) GenerateMultisampledTexture(f);
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else GenerateTexture(f);
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}
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private void GenerateTexture(Framebuffer f)
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{
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GL.BindTexture(TextureTarget.Texture2D, _id);
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GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInformation.InternalFormat,
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(int)f.Size.X, (int)f.Size.Y,
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0, PixelInformation.Format, PixelInformation.DataType, IntPtr.Zero);
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GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter,
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(int)TextureMinFilter.Linear);
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GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter,
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(int)TextureMinFilter.Linear);
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GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS,
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(int)TextureParameterName.ClampToEdge);
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GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT,
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(int)TextureParameterName.ClampToEdge);
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GL.BindTexture(TextureTarget.Texture2D, 0);
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}
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private void GenerateMultisampledTexture(Framebuffer f)
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{
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GL.BindTexture(TextureTarget.Texture2DMultisample, _id);
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GL.TexImage2DMultisample(TextureTargetMultisample.Texture2DMultisample, _multisamples, PixelInformation.InternalFormat, (int)f.Size.X, (int)f.Size.Y, true);
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GL.BindTexture(TextureTarget.Texture2DMultisample, 0);
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}
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}
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} |