private Framebuffer CreateFramebuffer(int width, int height)
{
var framebuffer = new Framebuffer(width, height);
framebuffer.Bind();
{
var texture = new Texture(new TexImageBitmap(width, height),
new TexParameteri(TexParameter.PropertyName.TextureWrapS, (int)GL.GL_REPEAT),
new TexParameteri(TexParameter.PropertyName.TextureWrapT, (int)GL.GL_REPEAT),
new TexParameteri(TexParameter.PropertyName.TextureWrapR, (int)GL.GL_REPEAT),
new TexParameteri(TexParameter.PropertyName.TextureMinFilter, (int)GL.GL_LINEAR),
new TexParameteri(TexParameter.PropertyName.TextureMagFilter, (int)GL.GL_LINEAR));
texture.Initialize();
framebuffer.Attach(FramebufferTarget.Framebuffer, texture, 0u);// 1
this.BindingTexture = texture;
}
{
var renderbuffer = new Renderbuffer(width, height, GL.GL_DEPTH_COMPONENT24);
framebuffer.Attach(FramebufferTarget.Framebuffer, renderbuffer, AttachmentLocation.Depth);// special
}
//framebuffer.SetDrawBuffer(GL.GL_COLOR_ATTACHMENT0 + 1);// as in 1 in framebuffer.Attach(FramebufferTarget.Framebuffer, texture, 1u);// 1
framebuffer.CheckCompleteness();
framebuffer.Unbind();
return(framebuffer);
}
private Framebuffer CreateFramebuffer(int width, int height)
{
var texture = new Texture(TextureTarget.Texture2D,
new NullImageFiller(width, height, GL.GL_RGBA, GL.GL_RGBA, GL.GL_UNSIGNED_BYTE),
new SamplerParameters(
TextureWrapping.Repeat,
TextureWrapping.Repeat,
TextureWrapping.Repeat,
TextureFilter.Linear,
TextureFilter.Linear));
texture.Initialize();
this.BindingTexture = texture;
Renderbuffer colorBuffer = Renderbuffer.CreateColorbuffer(width, height, GL.GL_RGBA);
Renderbuffer depthBuffer = Renderbuffer.CreateDepthbuffer(width, height, DepthComponentType.DepthComponent24);
var framebuffer = new Framebuffer();
framebuffer.Bind();
framebuffer.Attach(colorBuffer); //0
framebuffer.Attach(texture); //1
framebuffer.Attach(depthBuffer); // special
framebuffer.SetDrawBuffers(GL.GL_COLOR_ATTACHMENT0 + 1); // as in 1 in framebuffer.Attach(texture);//1
framebuffer.CheckCompleteness();
framebuffer.Unbind();
return(framebuffer);
}
private void Dispose(bool disposing)
{
if (this.disposedValue == false)
{
if (disposing)
{
// Dispose managed resources.
}
// Dispose unmanaged resources.
{
Renderbuffer depthBuffer = this.depthBuffer;
if (depthBuffer != null)
{
depthBuffer.Dispose();
}
}
{
Renderbuffer[] array = this.colorBufferList.ToArray();
foreach (var item in array)
{
item.Dispose();
}
}
{
IntPtr context = GL.Instance.GetCurrentContext();
if (context != IntPtr.Zero)
{
glDeleteFramebuffers(this.frameBuffer.Length, this.frameBuffer);
}
}
}
this.disposedValue = true;
}
private void Dispose(bool disposing)
{
if (this.disposedValue == false)
{
if (disposing)
{
// Dispose managed resources.
}
// Dispose unmanaged resources.
{
Renderbuffer depthBuffer = this.depthBuffer;
if (depthBuffer != null)
{
depthBuffer.Dispose();
}
}
{
Renderbuffer[] array = this.colorBufferList.ToArray();
foreach (var item in array)
{
item.Dispose();
}
}
{
glDeleteFramebuffers(this.frameBuffer.Length, this.frameBuffer);
}
}
this.disposedValue = true;
}
private void AttachDepthbuffer(Renderbuffer renderbuffer, FramebufferTarget target)
{
if (this.depthBuffer != null)
{
throw new Exception("Depth buffer already exists!");
}
glFramebufferRenderbuffer((uint)target, (uint)RenderbufferAttachment.DepthAttachment, OpenGL.GL_RENDERBUFFER, renderbuffer.Id);
this.depthBuffer = renderbuffer;
}
/// <summary>
/// Attach a <see cref="Renderbuffer"/> object as a color attachment to the currently bound framebuffer object.
/// </summary>
/// <param name="target"></param>
/// <param name="renderbuffer"></param>
/// <param name="colorAttachmentLocation">ranges from 0 to <see cref="Framebuffer.maxColorAttachmentCount"/> - 1.</param>
public void Attach(FramebufferTarget target, Renderbuffer renderbuffer, uint colorAttachmentLocation)
{
if (colorAttachmentLocation >= Framebuffer.maxColorAttachmentCount)
{
throw new IndexOutOfRangeException("Not enough attach points!");
}
glFramebufferRenderbuffer((uint)target, GL.GL_COLOR_ATTACHMENT0 + colorAttachmentLocation, GL.GL_RENDERBUFFER, renderbuffer.Id);
this.colorBuffers[colorAttachmentLocation] = renderbuffer;
}
/// <summary>
/// Attach a <see cref="Renderbuffer"/> object to the currently bound framebuffer object.
/// </summary>
/// <param name="target"></param>
/// <param name="renderbuffer"></param>
/// <param name="location"></param>
public void Attach(FramebufferTarget target, Renderbuffer renderbuffer, AttachmentLocation location)
{
switch (location)
{
case AttachmentLocation.Depth:
{
if (this.depthBuffer != null)
{
throw new Exception("Depth buffer already exists!");
}
glFramebufferRenderbuffer((uint)target, GL.GL_DEPTH_ATTACHMENT, GL.GL_RENDERBUFFER, renderbuffer.Id);
this.depthBuffer = renderbuffer;
}
break;
case AttachmentLocation.Stencil:
{
if (this.stencilBuffer != null)
{
throw new Exception("Stencil buffer already exists!");
}
glFramebufferRenderbuffer((uint)target, GL.GL_STENCIL_ATTACHMENT, GL.GL_RENDERBUFFER, renderbuffer.Id);
this.stencilBuffer = renderbuffer;
}
break;
case AttachmentLocation.DepthStencil:
{
if (this.depthBuffer != null)
{
throw new Exception("Depth buffer already exists!");
}
if (this.stencilBuffer != null)
{
throw new Exception("Stencil buffer already exists!");
}
glFramebufferRenderbuffer((uint)target, GL.GL_DEPTH_STENCIL_ATTACHMENT, GL.GL_RENDERBUFFER, renderbuffer.Id);
this.depthBuffer = renderbuffer;
this.stencilBuffer = renderbuffer;
}
break;
default:
throw new NotDealWithNewEnumItemException(typeof(AttachmentLocation));
}
}
private Framebuffer CreatePickFramebuffer(int width, int height)
{
Renderbuffer colorBuffer = Renderbuffer.CreateColorbuffer(width, height, GL.GL_RGBA);
Renderbuffer depthBuffer = Renderbuffer.CreateDepthbuffer(width, height, DepthComponentType.DepthComponent24);
var framebuffer = new Framebuffer();
framebuffer.Bind();
framebuffer.Attach(colorBuffer);
framebuffer.Attach(depthBuffer);
framebuffer.CheckCompleteness();
framebuffer.Unbind();
return(framebuffer);
}
private Renderbuffer AttachDepthbuffer(FramebufferTarget target)
{
if (this.depthBuffer != null)
{
throw new Exception("Depth buffer already exists!");
}
Renderbuffer depthBuffer = Renderbuffer.CreateDepthbuffer(this.Width, this.Height, DepthComponentType.DepthComponent24);
glFramebufferRenderbuffer((uint)target, (uint)RenderbufferAttachment.DepthAttachment, GL.GL_RENDERBUFFER, depthBuffer.Id);
this.depthBuffer = depthBuffer;
return(depthBuffer);
}
private Renderbuffer AttachColorbuffer(FramebufferTarget target)
{
if (nextColorAttachmentIndex >= attachment_id.Length)
{
throw new IndexOutOfRangeException("Not enough attach points!");
}
Renderbuffer colorBuffer = Renderbuffer.CreateColorbuffer(this.Width, this.Height, GL.GL_RGBA);
glFramebufferRenderbuffer((uint)target, attachment_id[nextColorAttachmentIndex++], GL.GL_RENDERBUFFER, colorBuffer.Id);
this.colorBufferList.Add(colorBuffer);
return(colorBuffer);
}
/// <summary>
/// Attach a render buffer.
/// <para>Bind() this framebuffer before invoking this method.</para>
/// </summary>
/// <param name="renderbuffer"></param>
/// <param name="target"></param>
/// <returns></returns>
public void Attach(Renderbuffer renderbuffer, FramebufferTarget target = FramebufferTarget.Framebuffer)
{
switch (renderbuffer.BufferType)
{
case RenderbufferType.DepthBuffer:
AttachDepthbuffer(renderbuffer, target);
break;
case RenderbufferType.ColorBuffer:
AttachColorbuffer(renderbuffer, target);
break;
default:
throw new NotImplementedException();
}
}
/// <summary>
/// Attach a render buffer.
/// <para>Bind() this framebuffer before invoking this method.</para>
/// </summary>
/// <param name="renderbuffer"></param>
/// <param name="target"></param>
/// <returns></returns>
public void Attach(Renderbuffer renderbuffer, FramebufferTarget target = FramebufferTarget.Framebuffer)
{
switch (renderbuffer.BufferType)
{
case RenderbufferType.DepthBuffer:
AttachDepthbuffer(renderbuffer, target);
break;
case RenderbufferType.ColorBuffer:
AttachColorbuffer(renderbuffer, target);
break;
default:
throw new Exception("Unexpected Renderbuffer type!");
}
}
private static Framebuffer CreateFramebuffer(int width, int height)
{
var framebuffer = new Framebuffer(width, height);
framebuffer.Bind();
{
var renderbuffer = new Renderbuffer(width, height, GL.GL_RGBA, RenderbufferType.ColorBuffer);
framebuffer.Attach(FramebufferTarget.Framebuffer, renderbuffer, 0u);// 0
}
{
var renderbuffer = new Renderbuffer(width, height, GL.GL_DEPTH_COMPONENT24, RenderbufferType.DepthBuffer);
framebuffer.Attach(FramebufferTarget.Framebuffer, renderbuffer, AttachmentLocation.Depth);// special
}
framebuffer.CheckCompleteness();
framebuffer.Unbind();
return framebuffer;
}
private Framebuffer CreateFramebuffer(int width, int height)
{
var framebuffer = new Framebuffer(width, height);
framebuffer.Bind();
Renderbuffer colorbuffer = framebuffer.Attach(RenderbufferType.ColorBuffer); //0
Texture texture = framebuffer.Attach(TextureAttachment.ColorAttachment); //1
Renderbuffer depthbuffer = framebuffer.Attach(RenderbufferType.DepthBuffer); // special
framebuffer.SetDrawBuffer(GL.GL_COLOR_ATTACHMENT0 + 1); // as in 1 in framebuffer.Attach(TextureAttachment.ColorAttachment);//1
framebuffer.CheckCompleteness();
framebuffer.Unbind();
this.BindingTexture = texture;
return(framebuffer);
}
/// <summary>
/// Attach a renderbuffer.
/// </summary>
/// <param name="renderbuffer"></param>
/// <param name="target"></param>
/// <returns></returns>
public Renderbuffer Attach(RenderbufferType renderbuffer, FramebufferTarget target = FramebufferTarget.Framebuffer)
{
Renderbuffer result = null;
switch (renderbuffer)
{
case RenderbufferType.DepthBuffer:
result = AttachDepthbuffer(target);
break;
case RenderbufferType.ColorBuffer:
result = AttachColorbuffer(target);
break;
default:
throw new Exception("Unexpected RenderbufferType!");
}
return(result);
}
private Framebuffer CreatePickFramebuffer(int width, int height)
{
var framebuffer = new Framebuffer(width, height);
framebuffer.Bind();
{
var renderbuffer = new Renderbuffer(width, height, GL.GL_RGBA);
// attach the renderbufer as first color buffer attachment.
const uint colorAttachmentLocation = 0;
framebuffer.Attach(FramebufferTarget.Framebuffer, renderbuffer, colorAttachmentLocation);
}
{
var renderbuffer = new Renderbuffer(width, height, GL.GL_DEPTH_COMPONENT24);
framebuffer.Attach(FramebufferTarget.Framebuffer, renderbuffer, AttachmentLocation.Depth);// special
}
framebuffer.CheckCompleteness();
framebuffer.Unbind();
return(framebuffer);
}
private void AttachColorbuffer(Renderbuffer renderbuffer, FramebufferTarget target)
{
if (nextColorAttachmentIndex >= attachment_id.Length)
{
throw new IndexOutOfRangeException("Not enough attach points!");
}
if (this.colorBufferList.Count > 0)
{
if (this.Width != renderbuffer.Width ||
this.Height != renderbuffer.Height)
{
throw new Exception("Size not match!");
}
}
glFramebufferRenderbuffer((uint)target, attachment_id[nextColorAttachmentIndex++], OpenGL.GL_RENDERBUFFER, renderbuffer.Id);
this.colorBufferList.Add(renderbuffer);
this.Width = renderbuffer.Width;
this.Height = renderbuffer.Height;
}
private static Framebuffer CreateFramebuffer(int width, int height, ContextGenerationParams parameters)
{
var framebuffer = new Framebuffer(width, height);
framebuffer.Bind();
{
var renderbuffer = new Renderbuffer(width, height, GL.GL_RGBA);
uint colorAttachmentLocation = 0;
framebuffer.Attach(FramebufferTarget.Framebuffer, renderbuffer, colorAttachmentLocation);// 0
}
{
var renderbuffer = new Renderbuffer(width, height, GL.GL_DEPTH_COMPONENT24);
framebuffer.Attach(FramebufferTarget.Framebuffer, renderbuffer, AttachmentLocation.Depth);// special
}
if (parameters.StencilBits > 0)
{
var renderbuffer = new Renderbuffer(width, height, GL.GL_STENCIL_INDEX8);
framebuffer.Attach(FramebufferTarget.Framebuffer, renderbuffer, AttachmentLocation.Stencil);
}
framebuffer.CheckCompleteness();
framebuffer.Unbind();
return(framebuffer);
}
