GPUTexture.h

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#pragma once
 
#include "Texture.h"
#include <Vector.h>
#include <Array/Array2D.h>
 
#ifdef CUDA_BACKEND
struct cudaGraphicsResource;
#endif
 
#ifdef VK_BACKEND
#include <VkDeviceArray.h>
#endif
 
namespace dyno {
 
    // texture for loading data from cuda/vulkan api
    template<typename T>
    class XTexture2D : public Texture2D
    {
    public:
        XTexture2D() {}
        ~XTexture2D() {}
 
        virtual void create() override;
        bool isValid() const;
 
        // update OpenGL texture within GL context
        void updateGL();
 
        // load data to into an intermediate buffer
        void load(dyno::DArray2D<T> data);
 
    private:
        int width  = -1;
        int height = -1;
 
#ifdef CUDA_BACKEND
        dyno::DArray2D<T>      buffer;
        cudaGraphicsResource*   resource = 0;
#endif
 
#ifdef VK_BACKEND
        dyno::CArray2D<T> temp;
 
        VkBuffer        buffer = VK_NULL_HANDLE;
        VkDeviceMemory  memory = VK_NULL_HANDLE;
        bool resized        = false;
#ifdef WIN32
        HANDLE handle = nullptr;  // The Win32 handle
#else
        int fd = -1;
#endif
        // command for copy buffer
        VkCommandBuffer copyCmd = VK_NULL_HANDLE;
        // OpenGL memory object
        unsigned int    memoryObject = 0;
#endif
    };
 
    template class XTexture2D<dyno::Vec4f>;
    template class XTexture2D<dyno::Vec3f>;
    template class XTexture2D<dyno::Vec3u>;
}