metalTexture.h

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// SPDX-License-Identifier: Apache-2.0
// Copyright 2025-2026 Arnis Lektauers
//
// Created by Arnis Lektauers on 08.08.2025.
//
#pragma once
 
#include "metalGraphicsDevice.h"
#include "Metal/Metal.hpp"
#include "platform/graphics/texture.h"
 
namespace visutwin::canvas::gpu
{
    class MetalTexture : public HardwareTexture {
    public:
        explicit MetalTexture(Texture* texture);
 
        ~MetalTexture();
 
        void create(MetalGraphicsDevice* device);
 
        [[nodiscard]] MTL::Texture* raw() const { return _metalTexture; }

        void setExternalTexture(MTL::Texture* externalTexture);
 
        void uploadImmediate(GraphicsDevice* device) override;
 
        void propertyChanged(uint32_t flag) override;
 
        // Upload texture data to GPU
        void uploadData(GraphicsDevice* device);
 
    private:
        void uploadRawImage(void* imageData, size_t imageDataSize, uint32_t mipLevel, uint32_t index) const;
        void uploadVolumeData(void* imageData, size_t imageDataSize, uint32_t mipLevel) const;
 
        Texture* _texture = nullptr;
 
        MTL::Texture* _metalTexture = nullptr;
        bool _ownsTexture = true;  
 
        MTL::TextureDescriptor* _descriptor = nullptr;
 
        // Array of samplers addressed by sample type
        std::vector<MTL::SamplerState*> _samplers;
    };
}