Texture.h

// Copyright(c) 2019 - 2020, #Momo
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#pragma once

#include "Utilities/STL/MxString.h"
#include "Utilities/STL/MxVector.h"
#include "Utilities/Math/Math.h"
#include "Utilities/Image/Image.h"

namespace MxEngine
{
    enum class TextureFormat : uint8_t
    {
        RGB,
        RGBA,
        RGB16,
        RGB16F,
        RGBA16,
        RGBA16F,
        RGB32F,
        RGBA32F,
        DEPTH,
    };

    enum class TextureWrap : uint8_t
    {
        CLAMP_TO_EDGE,
        CLAMP_TO_BORDER,
        MIRRORED_REPEAT,
        REPEAT,
    };

    const char* EnumToString(TextureFormat format);
    const char* EnumToString(TextureWrap wrap);

    class ImageData
    {
        uint8_t* data;
    };

    class Texture
    {
        using BindableId = unsigned int;

        MxString filepath;
        size_t width = 0, height = 0, channels = 0;
        BindableId id = 0;
        mutable BindableId activeId = 0;
        unsigned int textureType = 0;
        TextureFormat format = TextureFormat::RGB;
        TextureWrap wrapType = TextureWrap::REPEAT;
        uint8_t samples = 0;

        void FreeTexture();
    public:
        using RawData = uint8_t;
        using RawDataPointer = RawData*;
        using TextureBindId = BindableId;

        Texture();
        Texture(const Texture&) = delete;
        Texture(Texture&& texture) noexcept;
        Texture& operator=(const Texture& texture) = delete;
        Texture& operator=(Texture&& texture) noexcept;
        Texture(const MxString& filepath, TextureWrap wrap = TextureWrap::REPEAT, bool genMipmaps = true, bool flipImage = true);
        ~Texture();

        void Bind() const;
        void Unbind() const;
        BindableId GetNativeHandle() const;
        void Load(const MxString& filepath, TextureWrap wrap = TextureWrap::REPEAT, bool genMipmaps = true, bool flipImage = true);
        void Load(RawDataPointer data, int width, int height, TextureFormat format = TextureFormat::RGB, TextureWrap wrap = TextureWrap::REPEAT, bool genMipmaps = true);
        void LoadMipmaps(RawDataPointer* data, size_t mipmaps, int biggestWidth, int biggestHeight, TextureWrap wrap = TextureWrap::REPEAT);
        void LoadDepth(int width, int height, TextureWrap wrap = TextureWrap::CLAMP_TO_BORDER);
        void LoadMultisample(int width, int height, TextureFormat format, int samples, TextureWrap wrap = TextureWrap::REPEAT);
        Image GetRawTextureData() const;
        void GenerateMipmaps();
        void SetBorderColor(const Vector3& color);
        bool IsMultisampled() const;
        bool IsFloatingPoint() const;
        bool IsDepthOnly() const;
        int GetSampleCount() const;
        size_t GetPixelSize() const;
        TextureFormat GetFormat() const;
        TextureWrap GetWrapType() const;
        void Bind(TextureBindId id) const;
        const MxString& GetPath() const;
        unsigned int GetTextureType() const;
        size_t GetWidth() const;
        size_t GetHeight() const;
        size_t GetChannelCount() const;
    };
}