/// <summary>
/// Adds an attachment to the renderer description.
/// </summary>
/// <param name="attachment">The attachment description to add.</param>
/// <returns>The same object, to faciliate chaining.</returns>
public RendererDescription AddAttachment(AttachmentDescription attachment)
{
// Self-validation
if (!attachment.TryValidate(out var error))
{
throw new ArgumentException($"Bad attachment description - {error}");
}
// Validate against other attachments
if (_attachments.Count > 0)
{
if (attachment.SubpassCount != _attachments[^ 1].SubpassCount)
{
throw new ArgumentException("Bad attachment description - wrong subpass count");
}
int aidx = 0;
foreach (var att in _attachments)
{
if (attachment.IsDepth && att.IsDepth)
{
var dupOut = att.Uses.Where((use, idx) => (use == AttachmentUse.Output) && (use == attachment.Uses[idx]));
if (dupOut.Any())
{
throw new ArgumentException("Bad attachment description - duplicate depth/stencil output");
}
}
++aidx;
}
}
// Add description and return
_attachments.Add(attachment);
return(this);
}
/// <summary>
/// Starts a new renderer description with the given attachments.
/// </summary>
/// <param name="attachment">The first attachment of the description, which sets the subpass count.</param>
/// <param name="otherAttachments">The additional attachment descriptions.</param>
public RendererDescription(AttachmentDescription attachment, params AttachmentDescription[] otherAttachments)
{
_attachments = new(otherAttachments.Length + 1);
AddAttachment(attachment);
foreach (var att in otherAttachments)
{
AddAttachment(att);
}
}