internal Framebuffer(
FramebufferAttachmentDescription?depthTargetDesc,
IReadOnlyList <FramebufferAttachmentDescription> colorTargetDescs)
{
if (depthTargetDesc != null)
{
FramebufferAttachmentDescription depthAttachment = depthTargetDesc.Value;
DepthTarget = new FramebufferAttachment(depthAttachment.Target, depthAttachment.ArrayLayer);
}
FramebufferAttachment[] colorTargets = new FramebufferAttachment[colorTargetDescs.Count];
for (int i = 0; i < colorTargets.Length; i++)
{
colorTargets[i] = new FramebufferAttachment(colorTargetDescs[i].Target, colorTargetDescs[i].ArrayLayer);
}
ColorTargets = colorTargets;
if (ColorTargets.Count > 0)
{
Width = ColorTargets[0].Target.Width;
Height = ColorTargets[0].Target.Height;
}
else if (DepthTarget != null)
{
Width = DepthTarget.Value.Target.Width;
Height = DepthTarget.Value.Target.Height;
}
OutputDescription = OutputDescription.CreateFromFramebuffer(this);
}
/// <summary>
/// Constructs a new <see cref="FramebufferDescription"/>.
/// </summary>
/// <param name="depthTarget">The depth texture, which must have been created with
/// <see cref="TextureUsage.DepthStencil"/> usage flags. May be null.</param>
/// <param name="colorTargets">An array of color textures, all of which must have been created with
/// <see cref="TextureUsage.RenderTarget"/> usage flags. May be null or empty.</param>
public FramebufferDescription(Texture depthTarget, params Texture[] colorTargets)
{
if (depthTarget != null)
{
DepthTarget = new FramebufferAttachmentDescription(depthTarget, 0);
}
else
{
DepthTarget = null;
}
ColorTargets = new FramebufferAttachmentDescription[colorTargets.Length];
for (int i = 0; i < colorTargets.Length; i++)
{
ColorTargets[i] = new FramebufferAttachmentDescription(colorTargets[i], 0);
}
}