metalVertexBufferLayout.h

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// SPDX-License-Identifier: Apache-2.0
// Copyright 2025-2026 Arnis Lektauers
//
// Created by Arnis Lektauers on 14.11.2025.
//
#pragma once
 
#include <memory>
#include <unordered_map>
#include <vector>
 
#include "platform/graphics/vertexFormat.h"
 
namespace visutwin::canvas
{
    class MetalVertexBufferLayout
    {
    public:
        std::vector<void*> get(const std::shared_ptr<VertexFormat>& vertexFormat0,
            const std::shared_ptr<VertexFormat>& vertexFormat1 = nullptr);
 
    private:
        std::string getKey(const std::shared_ptr<VertexFormat>& vertexFormat0,
            const  std::shared_ptr<VertexFormat>& vertexFormat1) const;

        std::vector<void*> create(const std::shared_ptr<VertexFormat>& vertexFormat0,
            const std::shared_ptr<VertexFormat>& vertexFormat1 = nullptr);
 
        // Cache of vertex buffer layouts keyed by a format combination
        std::unordered_map<std::string, std::vector<void*>> _cache;
    };
}