/// <summary>
/// Applies the geometry stream to the graphics device.
/// </summary>
public void Apply()
{
Contract.EnsureNotDisposed(this, Disposed);
if (IsUsingVertexArrayObject)
{
OpenGLState.BindVertexArrayObject(vao, glElementArrayBufferBinding ?? 0);
}
else
{
if (ibuffer != null)
{
OpenGLState.BindElementArrayBuffer(ibuffer.OpenGLName);
}
}
}
/// <inheritdoc/>
public override void Attach(IndexBuffer ibuffer)
{
Contract.Require(ibuffer, nameof(ibuffer));
Contract.EnsureNot(HasIndices, UltravioletStrings.GeometryStreamAlreadyHasIndices);
Contract.EnsureNotDisposed(this, Disposed);
Ultraviolet.ValidateResource(ibuffer);
var oglIndexBuffer = (OpenGLIndexBuffer)ibuffer;
var oglIndexBufferName = oglIndexBuffer.OpenGLName;
this.ibuffer = oglIndexBuffer;
if (IsUsingVertexArrayObject)
{
using (OpenGLState.ScopedBindVertexArrayObject(vao, 0, force: true))
{
OpenGLState.BindElementArrayBuffer(oglIndexBufferName);
}
}
this.glElementArrayBufferBinding = oglIndexBufferName;
this.indexBufferElementType = ibuffer.IndexElementType;
}