const std = @import("std");
const ChainedStruct = @import("types.zig").ChainedStruct;
const TextureView = @import("texture_view.zig").TextureView;

pub const Texture = enum(usize) {
    _,

    // TODO: verify there is a use case for nullable value of this type.
    pub const none: Texture = @intToEnum(Texture, 0);

    pub const Aspect = enum(u32) {
        all = 0x00000000,
        stencil_only = 0x00000001,
        depth_only = 0x00000002,
        plane0_only = 0x00000003,
        plane1_only = 0x00000004,
    };

    pub const ComponentType = enum(u32) {
        float = 0x00000000,
        sint = 0x00000001,
        uint = 0x00000002,
        depth_comparison = 0x00000003,
    };

    pub const Dimension = enum(u32) {
        dimension_1d = 0x00000000,
        dimension_2d = 0x00000001,
        dimension_3d = 0x00000002,
    };

    pub const Format = enum(u32) {
        undef = 0x00000000,
        r8_unorm = 0x00000001,
        r8_snorm = 0x00000002,
        r8_uint = 0x00000003,
        r8_sint = 0x00000004,
        r16_uint = 0x00000005,
        r16_sint = 0x00000006,
        r16_float = 0x00000007,
        rg8_unorm = 0x00000008,
        rg8_snorm = 0x00000009,
        rg8_uint = 0x0000000a,
        rg8_sint = 0x0000000b,
        r32_float = 0x0000000c,
        r32_uint = 0x0000000d,
        r32_sint = 0x0000000e,
        rg16_uint = 0x0000000f,
        rg16_sint = 0x00000010,
        rg16_float = 0x00000011,
        rgba8_unorm = 0x00000012,
        rgba8_unorm_srgb = 0x00000013,
        rgba8_snorm = 0x00000014,
        rgba8_uint = 0x00000015,
        rgba8_sint = 0x00000016,
        bgra8_unorm = 0x00000017,
        bgra8_unorm_srgb = 0x00000018,
        rgb10_a2_unorm = 0x00000019,
        rg11_b10_ufloat = 0x0000001a,
        rgb9_e5_ufloat = 0x0000001b,
        rg32_float = 0x0000001c,
        rg32_uint = 0x0000001d,
        rg32_sint = 0x0000001e,
        rgba16_uint = 0x0000001f,
        rgba16_sint = 0x00000020,
        rgba16_float = 0x00000021,
        rgba32_float = 0x00000022,
        rgba32_uint = 0x00000023,
        rgba32_sint = 0x00000024,
        stencil8 = 0x00000025,
        depth16_unorm = 0x00000026,
        depth24_plus = 0x00000027,
        depth24_plus_stencil8 = 0x00000028,
        depth32_float = 0x00000029,
        depth32_float_stencil8 = 0x0000002a,
        bc1_rgba_unorm = 0x0000002b,
        bc1_rgba_unorm_srgb = 0x0000002c,
        bc2_rgba_unorm = 0x0000002d,
        bc2_rgba_unorm_srgb = 0x0000002e,
        bc3_rgba_unorm = 0x0000002f,
        bc3_rgba_unorm_srgb = 0x00000030,
        bc4_runorm = 0x00000031,
        bc4_rsnorm = 0x00000032,
        bc5_rg_unorm = 0x00000033,
        bc5_rg_snorm = 0x00000034,
        bc6_hrgb_ufloat = 0x00000035,
        bc6_hrgb_float = 0x00000036,
        bc7_rgba_unorm = 0x00000037,
        bc7_rgba_unorm_srgb = 0x00000038,
        etc2_rgb8_unorm = 0x00000039,
        etc2_rgb8_unorm_srgb = 0x0000003a,
        etc2_rgb8_a1_unorm = 0x0000003b,
        etc2_rgb8_a1_unorm_srgb = 0x0000003c,
        etc2_rgba8_unorm = 0x0000003d,
        etc2_rgba8_unorm_srgb = 0x0000003e,
        eacr11_unorm = 0x0000003f,
        eacr11_snorm = 0x00000040,
        eacrg11_unorm = 0x00000041,
        eacrg11_snorm = 0x00000042,
        astc4x4_unorm = 0x00000043,
        astc4x4_unorm_srgb = 0x00000044,
        astc5x4_unorm = 0x00000045,
        astc5x4_unorm_srgb = 0x00000046,
        astc5x5_unorm = 0x00000047,
        astc5x5_unorm_srgb = 0x00000048,
        astc6x5_unorm = 0x00000049,
        astc6x5_unorm_srgb = 0x0000004a,
        astc6x6_unorm = 0x0000004b,
        astc6x6_unorm_srgb = 0x0000004c,
        astc8x5_unorm = 0x0000004d,
        astc8x5_unorm_srgb = 0x0000004e,
        astc8x6_unorm = 0x0000004f,
        astc8x6_unorm_srgb = 0x00000050,
        astc8x8_unorm = 0x00000051,
        astc8x8_unorm_srgb = 0x00000052,
        astc10x5_unorm = 0x00000053,
        astc10x5_unorm_srgb = 0x00000054,
        astc10x6_unorm = 0x00000055,
        astc10x6_unorm_srgb = 0x00000056,
        astc10x8_unorm = 0x00000057,
        astc10x8_unorm_srgb = 0x00000058,
        astc10x10_unorm = 0x00000059,
        astc10x10_unorm_srgb = 0x0000005a,
        astc12x10_unorm = 0x0000005b,
        astc12x10_unorm_srgb = 0x0000005c,
        astc12x12_unorm = 0x0000005d,
        astc12x12_unorm_srgb = 0x0000005e,
        r8_bg8_biplanar420_unorm = 0x0000005f,
    };

    pub const SampleType = enum(u32) {
        undef = 0x00000000,
        float = 0x00000001,
        unfilterable_float = 0x00000002,
        depth = 0x00000003,
        sint = 0x00000004,
        uint = 0x00000005,
    };

    pub const UsageFlags = packed struct {
        copy_src: bool = false,
        copy_dst: bool = false,
        texture_binding: bool = false,
        storage_binding: bool = false,
        render_attachment: bool = false,
        present: bool = false,

        _padding: u26 = 0,

        comptime {
            std.debug.assert(
                @sizeOf(@This()) == @sizeOf(u32) and
                    @bitSizeOf(@This()) == @bitSizeOf(u32),
            );
        }

        pub const none = UsageFlags{};

        pub fn equal(a: UsageFlags, b: UsageFlags) bool {
            return @truncate(u6, @bitCast(u32, a)) == @truncate(u6, @bitCast(u32, b));
        }
    };

    pub const BindingLayout = extern struct {
        next_in_chain: *const ChainedStruct,
        sample_type: SampleType,
        view_dimension: TextureView.Dimension,
        multisampled: bool,
    };

    pub const DataLayout = extern struct {
        next_in_chain: *const ChainedStruct,
        offset: u64,
        bytes_per_row: u32,
        rows_per_image: u32,
    };
};