internal static VkPipeline CreatePipeline(PipelineDescription desc, Renderer renderer, uint subpass,
out BuildStates buildState)
{
// Validate
var rlayout = (renderer.MSAA != MSAA.X1) ? renderer.MSAALayout ! : renderer.Layout;
if (!desc.IsComplete)
{
throw new InvalidOperationException("Cannot create a pipeline from an incomplete description");
}
if (desc.Shader !.IsDisposed)
{
throw new ObjectDisposedException("desc.Shader", "Cannot build a pipeline with a disposed shader");
}
var cacnt = rlayout.Subpasses[subpass].ColorCount;
if (desc.AllColorBlends !.Length != 1 && (cacnt != desc.AllColorBlends.Length))
{
throw new InvalidOperationException("Invalid color blend count for pipeline");
}
var hasds = rlayout.Subpasses[subpass].DepthOffset.HasValue;
if (!hasds && (desc.DepthStencil !.Value.DepthMode != DepthMode.None))
{
throw new InvalidOperationException(
"Cannot perform depth/stencil operations on non-depth/stencil subpass");
}
if (desc.Shader !.CheckCompatiblity(desc, renderer, subpass) is string shaderErr)
{
throw new InvalidOperationException($"Invalid shader for pipeline - {shaderErr}");
}
// Describe the color blends
var cblends = (desc.AllColorBlends.Length != 1)
? desc.AllColorBlends !
: Enumerable.Repeat((ColorBlendState)desc.SharedColorBlend !, (int)cacnt).ToArray();
// Vertex info
CalculateVertexInfo(desc.VertexDescriptions !, out var vertexAttrs, out var vertexBinds);
// Create the build states
buildState = new(
cblends,
desc.BlendConstants,
(DepthStencilState)desc.DepthStencil !,
(VertexInput)desc.VertexInput !,
vertexBinds,
vertexAttrs,
(RasterizerState)desc.Rasterizer !
);
// Create the initial pipeline
return(CreatePipeline(buildState, renderer, subpass, desc.Shader !.Layout, desc.Shader.Program));
}
/// <summary>
/// Create a new pipeline with the given description, for use in the given renderer and subpass.
/// </summary>
/// <param name="description">The description of the pipeline states to build into the pipeline.</param>
/// <param name="renderer">The renderer to use the pipeline in.</param>
/// <param name="subpass">The subpass index within the renderer to use the pipeline in.</param>
public Pipeline(PipelineDescription description, Renderer renderer, uint subpass)
: base(ResourceType.Pipeline)
{
// Create the pipeline handle
Handle = CreatePipeline(description, renderer, subpass, out var cache);
if (renderer.MSAALayout is not null)
{
BuildCache = cache; // Only save cache if we might rebuild from MSAA change
}
// Assign fields
Layout = description.Shader !.Layout;
Layout.IncRefCount();
ShaderProgram = description.Shader.Program;
ShaderProgram.IncRefCount();
Renderer = renderer;
Subpass = subpass;
// Assign values
VertexBindingCount = (uint)cache.VertexBindings.Length;
// Register to the renderer
renderer.AddPipeline(this);
}
