private unsafe void CreateRenderPass(PipelineStateDescription pipelineStateDescription)
{
bool hasDepthStencilAttachment = pipelineStateDescription.Output.DepthStencilFormat != PixelFormat.None;
var renderTargetCount = pipelineStateDescription.Output.RenderTargetCount;
var attachmentCount = renderTargetCount;
if (hasDepthStencilAttachment)
{
attachmentCount++;
}
var attachments = new AttachmentDescription[attachmentCount];
var colorAttachmentReferences = new AttachmentReference[renderTargetCount];
fixed(PixelFormat *renderTargetFormat = &pipelineStateDescription.Output.RenderTargetFormat0)
fixed(BlendStateRenderTargetDescription * blendDescription = &pipelineStateDescription.BlendState.RenderTarget0)
{
for (int i = 0; i < renderTargetCount; i++)
{
var currentBlendDesc = pipelineStateDescription.BlendState.IndependentBlendEnable ? (blendDescription + i) : blendDescription;
attachments[i] = new AttachmentDescription
{
Format = VulkanConvertExtensions.ConvertPixelFormat(*(renderTargetFormat + i)),
Samples = SampleCountFlags.Sample1,
LoadOperation = currentBlendDesc->BlendEnable ? AttachmentLoadOperation.Load : AttachmentLoadOperation.DontCare, // TODO VULKAN: Only if any destination blend?
StoreOperation = AttachmentStoreOperation.Store,
StencilLoadOperation = AttachmentLoadOperation.DontCare,
StencilStoreOperation = AttachmentStoreOperation.DontCare,
InitialLayout = ImageLayout.ColorAttachmentOptimal,
FinalLayout = ImageLayout.ColorAttachmentOptimal,
};
colorAttachmentReferences[i] = new AttachmentReference
{
Attachment = (uint)i,
Layout = ImageLayout.ColorAttachmentOptimal,
};
}
}
if (hasDepthStencilAttachment)
{
attachments[attachmentCount - 1] = new AttachmentDescription
{
Format = Texture.GetFallbackDepthStencilFormat(GraphicsDevice, VulkanConvertExtensions.ConvertPixelFormat(pipelineStateDescription.Output.DepthStencilFormat)),
Samples = SampleCountFlags.Sample1,
LoadOperation = AttachmentLoadOperation.Load, // TODO VULKAN: Only if depth read enabled?
StoreOperation = AttachmentStoreOperation.Store, // TODO VULKAN: Only if depth write enabled?
StencilLoadOperation = AttachmentLoadOperation.DontCare, // TODO VULKAN: Handle stencil
StencilStoreOperation = AttachmentStoreOperation.DontCare,
InitialLayout = ImageLayout.DepthStencilAttachmentOptimal,
FinalLayout = ImageLayout.DepthStencilAttachmentOptimal,
};
}
var depthAttachmentReference = new AttachmentReference
{
Attachment = (uint)attachments.Length - 1,
Layout = ImageLayout.DepthStencilAttachmentOptimal,
};
var subpass = new SubpassDescription
{
PipelineBindPoint = PipelineBindPoint.Graphics,
ColorAttachmentCount = (uint)renderTargetCount,
ColorAttachments = colorAttachmentReferences.Length > 0 ? new IntPtr(Interop.Fixed(colorAttachmentReferences)) : IntPtr.Zero,
DepthStencilAttachment = hasDepthStencilAttachment ? new IntPtr(&depthAttachmentReference) : IntPtr.Zero,
};
var renderPassCreateInfo = new RenderPassCreateInfo
{
StructureType = StructureType.RenderPassCreateInfo,
AttachmentCount = (uint)attachmentCount,
Attachments = attachments.Length > 0 ? new IntPtr(Interop.Fixed(attachments)) : IntPtr.Zero,
SubpassCount = 1,
Subpasses = new IntPtr(&subpass)
};
NativeRenderPass = GraphicsDevice.NativeDevice.CreateRenderPass(ref renderPassCreateInfo);
}