Buffer.hpp

#pragma once
 
#include <stdint.h>
 
#include <Common/Containers/Bitset.hpp>
 
#include "Formats.hpp"
 
namespace Grindstone::GraphicsAPI {
    enum class BufferUsage : uint8_t {
        Vertex = 1,
        Index = 1 << 1,
        Uniform = 1 << 2,
        Storage = 1 << 3,
        Indirect = 1 << 4,
        TransferSrc = 1 << 5,
        TransferDst = 1 << 6
    };
}
 
template <>
struct EnumFlagsTraits<Grindstone::GraphicsAPI::BufferUsage> {
    static constexpr const char* names[] = {
        "Vertex",
        "Index",
        "Uniform",
        "Storage",
        "Indirect",
        "TransferSrc",
        "TransferDst"
    };
    static constexpr size_t size = 7;
};
 
inline Grindstone::GraphicsAPI::BufferUsage operator|(Grindstone::GraphicsAPI::BufferUsage a, const Grindstone::GraphicsAPI::BufferUsage b) {
    using Underlying = uint8_t;
    return static_cast<Grindstone::GraphicsAPI::BufferUsage>(static_cast<Underlying>(a) | static_cast<Underlying>(b));
}
 
inline Grindstone::GraphicsAPI::BufferUsage operator&(Grindstone::GraphicsAPI::BufferUsage a, const Grindstone::GraphicsAPI::BufferUsage b) {
    using Underlying = uint8_t;
    return static_cast<Grindstone::GraphicsAPI::BufferUsage>(static_cast<Underlying>(a) & static_cast<Underlying>(b));
}
 
namespace Grindstone::GraphicsAPI {
    class Buffer {
    public:
        struct CreateInfo {
            const char* debugName;
            const void* content;
            size_t bufferSize;
            Grindstone::Containers::BitsetFlags<BufferUsage> bufferUsage;
            MemoryUsage memoryUsage;
        };
 
        Buffer(const Grindstone::GraphicsAPI::Buffer::CreateInfo& createInfo) :
            debugName(createInfo.debugName),
            bufferUsage(createInfo.bufferUsage),
            memoryUsage(createInfo.memoryUsage),
            bufferSize(createInfo.bufferSize) {};
 
        virtual ~Buffer() {}
        virtual void* Map() = 0;
        virtual void Unmap() = 0;
        virtual void UploadData(const void* data, size_t size, size_t offset = 0) = 0;
 
        void UploadData(const void* data) {
            UploadData(data, bufferSize, 0);
        }
 
        BufferUsage GetBufferUsage() const {
            return bufferUsage.GetValueEnum();
        }
 
        MemoryUsage GetMemoryUsage() const {
            return memoryUsage;
        }
 
        size_t GetSize() const {
            return bufferSize;
        }
 
    protected:
        const char* debugName;
        Grindstone::Containers::BitsetFlags<BufferUsage> bufferUsage;
        MemoryUsage memoryUsage;
        size_t bufferSize;
        void* mappedMemoryPtr = nullptr;
    };
};