const std = @import("std");
const ChainedStruct = @import("types.zig").ChainedStruct;
const TextureView = @import("texture_view.zig").TextureView;
const TextureViewDimension = @import("texture_view.zig").TextureViewDimension;
const TextureViewDescriptor = @import("texture_view.zig").TextureViewDescriptor;
const Extent3D = @import("types.zig").Extent3D;
const Impl = @import("interface.zig").Impl;
const copy_stride_undefined = @import("main.zig").copy_stride_undefined;

pub const Texture = *opaque {
    pub inline fn createView(texture: Texture, descriptor: ?*const TextureViewDescriptor) *TextureView {
        return Impl.textureCreateView(texture, descriptor);
    }

    pub inline fn destroy(texture: Texture) void {
        Impl.textureDestroy(texture);
    }

    pub inline fn getDepthOrArrayLayers(texture: Texture) u32 {
        return Impl.textureGetDepthOrArrayLayers(texture);
    }

    pub inline fn getDimension(texture: Texture) TextureDimension {
        return Impl.textureGetDimension(texture);
    }

    pub inline fn getFormat(texture: Texture) TextureFormat {
        return Impl.textureGetFormat(texture);
    }

    pub inline fn getHeight(texture: Texture) u32 {
        return Impl.textureGetHeight(texture);
    }

    pub inline fn getMipLevelCount(texture: Texture) u32 {
        return Impl.textureGetMipLevelCount(texture);
    }

    pub inline fn getSampleCount(texture: Texture) u32 {
        return Impl.textureGetSampleCount(texture);
    }

    pub inline fn getUsage(texture: Texture) TextureUsageFlags {
        return Impl.textureGetUsage(texture);
    }

    pub inline fn getWidth(texture: Texture) u32 {
        return Impl.textureGetWidth(texture);
    }

    pub inline fn setLabel(texture: Texture, label: [*:0]const u8) void {
        Impl.textureSetLabel(texture, label);
    }

    pub inline fn reference(texture: Texture) void {
        Impl.textureReference(texture);
    }

    pub inline fn release(texture: Texture) void {
        Impl.textureRelease(texture);
    }
};

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

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

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

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

pub const TextureUsageFlags = 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 = TextureUsageFlags{};

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

pub const TextureBindingLayout = extern struct {
    next_in_chain: ?*const ChainedStruct = null,
    sample_type: TextureSampleType = .undef,
    view_dimension: TextureViewDimension = .dimension_undef,
    multisampled: bool = false,
};

pub const TextureDataLayout = extern struct {
    next_in_chain: ?*const ChainedStruct = null,
    offset: u64 = 0,
    bytes_per_row: u32 = copy_stride_undefined,
    rows_per_image: u32 = copy_stride_undefined,
};

pub const TextureDescriptor = extern struct {
    next_in_chain: ?*const ChainedStruct = null,
    label: ?[*:0]const u8 = null,
    usage: TextureUsageFlags,
    dimension: TextureDimension = .dimension_2d,
    size: Extent3D,
    format: TextureFormat,
    mip_level_count: u32 = 1,
    sample_count: u32 = 1,
    view_format_count: u32 = 0,
    // TODO: file a bug on Dawn, this is not marked as nullable but in fact is.
    view_formats: ?[*]const TextureFormat,
};