private void Attach(FrameBufferDescription description)
{
if (!description.HasAttachments)
{
throw new ArgumentException("Can't create a framebuffer object without attachments.", "description");
}
Description = description;
if (graphicsDevice.OpenGLCapabilities.DirectStateAccess == DirectStateAccess.None)
{
graphicsDevice.BindManager.Fbo = this;
if (description.ColorAttachmentIDs != null)
{
DrawBuffersEnum[] buffers = new DrawBuffersEnum[description.ColorAttachmentIDs.Length];
for (int i = 0; i < description.ColorAttachmentIDs.Length; i++)
{
GL.FramebufferTexture(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0 + i, description.ColorAttachmentIDs[i], 0);
buffers[i] = DrawBuffersEnum.ColorAttachment0 + i;
}
if (description.ColorAttachmentIDs.Length == 0)
{
GL.DrawBuffer(DrawBufferMode.None);
}
else
{
GL.DrawBuffers(buffers.Length, buffers);
}
}
else
{
GL.DrawBuffer(DrawBufferMode.None);
}
if (description.DepthAttachmentID != -1)
{
GL.FramebufferTexture(FramebufferTarget.Framebuffer, FramebufferAttachment.DepthAttachment, description.DepthAttachmentID, 0);
}
}
else if (graphicsDevice.OpenGLCapabilities.DirectStateAccess == DirectStateAccess.Extension)
{
if (description.ColorAttachmentIDs != null)
{
OpenTK.Graphics.OpenGL.DrawBufferMode[] buffers = new OpenTK.Graphics.OpenGL.DrawBufferMode[description.ColorAttachmentIDs.Length];
for (int i = 0; i < description.ColorAttachmentIDs.Length; i++)
{
Ext.NamedFramebufferTexture(FboID, OpenTK.Graphics.OpenGL.FramebufferAttachment.ColorAttachment0 + i, description.ColorAttachmentIDs[i], 0);
buffers[i] = OpenTK.Graphics.OpenGL.DrawBufferMode.ColorAttachment0 + i;
}
if (description.ColorAttachmentIDs.Length == 0)
{
Ext.FramebufferDrawBuffer(FboID, OpenTK.Graphics.OpenGL.DrawBufferMode.None);
}
else
{
Ext.FramebufferDrawBuffers(FboID, buffers.Length, buffers);
}
}
else
{
GL.DrawBuffer(DrawBufferMode.None);
}
if (description.DepthAttachmentID != -1)
{
Ext.NamedFramebufferTexture(FboID, OpenTK.Graphics.OpenGL.FramebufferAttachment.DepthAttachment, description.DepthAttachmentID, 0);
}
}
}