using RefreshCS;

namespace MoonWorks.Graphics
{
    public struct SamplerState
    {
        public Filter MinFilter;
        public Filter MagFilter;
        public SamplerMipmapMode MipmapMode;
        public SamplerAddressMode AddressModeU;
        public SamplerAddressMode AddressModeV;
        public SamplerAddressMode AddressModeW;
        public float MipLodBias;
        public bool AnisotropyEnable;
        public float MaxAnisotropy;
        public bool CompareEnable;
        public CompareOp CompareOp;
        public float MinLod;
        public float MaxLod;
        public BorderColor BorderColor;

        public static readonly SamplerState AnisotropicClamp = new SamplerState
        {
            MinFilter = Filter.Linear,
            MagFilter = Filter.Linear,
            MipmapMode = SamplerMipmapMode.Linear,
            AddressModeU = SamplerAddressMode.ClampToEdge,
            AddressModeV = SamplerAddressMode.ClampToEdge,
            AddressModeW = SamplerAddressMode.ClampToEdge,
            CompareEnable = false,
            AnisotropyEnable = true,
            MaxAnisotropy = 4,
            MipLodBias = 0f,
            MinLod = 0,
            MaxLod = 1000 /* VK_LOD_CLAMP_NONE */
        };

        public static readonly SamplerState AnisotropicWrap = new SamplerState
        {
            MinFilter = Filter.Linear,
            MagFilter = Filter.Linear,
            MipmapMode = SamplerMipmapMode.Linear,
            AddressModeU = SamplerAddressMode.Repeat,
            AddressModeV = SamplerAddressMode.Repeat,
            AddressModeW = SamplerAddressMode.Repeat,
            CompareEnable = false,
            AnisotropyEnable = true,
            MaxAnisotropy = 4,
            MipLodBias = 0f,
            MinLod = 0,
            MaxLod = 1000 /* VK_LOD_CLAMP_NONE */
        };

        public static readonly SamplerState LinearClamp = new SamplerState
        {
            MinFilter = Filter.Linear,
            MagFilter = Filter.Linear,
            MipmapMode = SamplerMipmapMode.Linear,
            AddressModeU = SamplerAddressMode.ClampToEdge,
            AddressModeV = SamplerAddressMode.ClampToEdge,
            AddressModeW = SamplerAddressMode.ClampToEdge,
            CompareEnable = false,
            AnisotropyEnable = false,
            MipLodBias = 0f,
            MinLod = 0,
            MaxLod = 1000
        };

        public static readonly SamplerState LinearWrap = new SamplerState
        {
            MinFilter = Filter.Linear,
            MagFilter = Filter.Linear,
            MipmapMode = SamplerMipmapMode.Linear,
            AddressModeU = SamplerAddressMode.Repeat,
            AddressModeV = SamplerAddressMode.Repeat,
            AddressModeW = SamplerAddressMode.Repeat,
            CompareEnable = false,
            AnisotropyEnable = false,
            MipLodBias = 0f,
            MinLod = 0,
            MaxLod = 1000
        };

        public static readonly SamplerState PointClamp = new SamplerState
        {
            MinFilter = Filter.Nearest,
            MagFilter = Filter.Nearest,
            MipmapMode = SamplerMipmapMode.Nearest,
            AddressModeU = SamplerAddressMode.ClampToEdge,
            AddressModeV = SamplerAddressMode.ClampToEdge,
            AddressModeW = SamplerAddressMode.ClampToEdge,
            CompareEnable = false,
            AnisotropyEnable = false,
            MipLodBias = 0f,
            MinLod = 0,
            MaxLod = 1000
        };

        public static readonly SamplerState PointWrap = new SamplerState
        {
            MinFilter = Filter.Nearest,
            MagFilter = Filter.Nearest,
            MipmapMode = SamplerMipmapMode.Nearest,
            AddressModeU = SamplerAddressMode.Repeat,
            AddressModeV = SamplerAddressMode.Repeat,
            AddressModeW = SamplerAddressMode.Repeat,
            CompareEnable = false,
            AnisotropyEnable = false,
            MipLodBias = 0f,
            MinLod = 0,
            MaxLod = 1000
        };

        public Refresh.SamplerStateCreateInfo ToRefreshSamplerStateCreateInfo()
        {
            return new Refresh.SamplerStateCreateInfo
            {
                minFilter = (Refresh.Filter)MinFilter,
                magFilter = (Refresh.Filter)MagFilter,
                mipmapMode = (Refresh.SamplerMipmapMode)MipmapMode,
                addressModeU = (Refresh.SamplerAddressMode)AddressModeU,
                addressModeV = (Refresh.SamplerAddressMode)AddressModeV,
                addressModeW = (Refresh.SamplerAddressMode)AddressModeW,
                mipLodBias = MipLodBias,
                anisotropyEnable = Conversions.BoolToByte(AnisotropyEnable),
                maxAnisotropy = MaxAnisotropy,
                compareEnable = Conversions.BoolToByte(CompareEnable),
                compareOp = (Refresh.CompareOp)CompareOp,
                minLod = MinLod,
                maxLod = MaxLod,
                borderColor = (Refresh.BorderColor)BorderColor
            };
        }
    }
}