indexBuffer.h

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// SPDX-License-Identifier: Apache-2.0
// Copyright 2025-2026 Arnis Lektauers
//
// Created by Arnis Lektauers on 13.09.2025.
//
#pragma once
 
#include <cstdint>
#include <vector>
 
namespace visutwin::canvas
{
    enum IndexFormat {
        INDEXFORMAT_UINT8 = 0,
        INDEXFORMAT_UINT16 = 1,
        INDEXFORMAT_UINT32 = 2
    };
 
    class GraphicsDevice;

    class IndexBuffer
    {
    public:
        IndexBuffer(GraphicsDevice* graphicsDevice, IndexFormat format, int numIndices);
        virtual ~IndexBuffer() = default;
 
        IndexFormat format() const { return _format; }
 
        int numIndices() const { return _numIndices; }
 
        virtual void* nativeBuffer() const { return nullptr; }
 
        virtual bool setData(const std::vector<uint8_t>& data) { (void)data; return false; }

        const std::vector<uint8_t>& storage() const { return _storage; }
 
    private:
        static int _nextId;
 
    protected:
        GraphicsDevice* _device = nullptr;
        std::vector<uint8_t> _storage;
 
    private:
        IndexFormat _format;
 
        int _numIndices;
    };
}