feat: finish ghostty pane backend integration

1 files changed, 452 insertions, 0 deletions

diff --git a/vendor/libghostty-vt/src/renderer/metal/api.zig b/vendor/libghostty-vt/src/renderer/metal/api.zig
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@@ -0,0 +1,452 @@
+//! This file contains the definitions of the Metal API that we use.
+//!
+//! Because the online Apple developer docs have recently (as of January 2025)
+//! been changed to hide enum values, `Metal-cpp` has been used as a reference
+//! source instead.
+//!
+//! Ref: https://developer.apple.com/metal/cpp/
+
+/// https://developer.apple.com/documentation/metal/mtlcommandbufferstatus?language=objc
+pub const MTLCommandBufferStatus = enum(c_ulong) {
+    not_enqueued = 0,
+    enqueued = 1,
+    committed = 2,
+    scheduled = 3,
+    completed = 4,
+    @"error" = 5,
+    _,
+};
+
+/// https://developer.apple.com/documentation/metal/mtlloadaction?language=objc
+pub const MTLLoadAction = enum(c_ulong) {
+    dont_care = 0,
+    load = 1,
+    clear = 2,
+};
+
+/// https://developer.apple.com/documentation/metal/mtlstoreaction?language=objc
+pub const MTLStoreAction = enum(c_ulong) {
+    dont_care = 0,
+    store = 1,
+    multisample_resolve = 2,
+    store_and_multisample_resolve = 3,
+    unknown = 4,
+    custom_sample_depth_store = 5,
+};
+
+/// https://developer.apple.com/documentation/metal/mtlresourceoptions?language=objc
+pub const MTLResourceOptions = packed struct(c_ulong) {
+    /// https://developer.apple.com/documentation/metal/mtlcpucachemode?language=objc
+    cpu_cache_mode: CPUCacheMode = .default,
+    /// https://developer.apple.com/documentation/metal/mtlstoragemode?language=objc
+    storage_mode: StorageMode,
+    /// https://developer.apple.com/documentation/metal/mtlhazardtrackingmode?language=objc
+    hazard_tracking_mode: HazardTrackingMode = .default,
+
+    _pad: @Type(.{
+        .int = .{ .signedness = .unsigned, .bits = @bitSizeOf(c_ulong) - 10 },
+    }) = 0,
+
+    pub const CPUCacheMode = enum(u4) {
+        default = 0,
+        write_combined = 1,
+    };
+
+    pub const StorageMode = enum(u4) {
+        shared = 0,
+        managed = 1,
+        private = 2,
+        memoryless = 3,
+    };
+
+    pub const HazardTrackingMode = enum(u2) {
+        default = 0,
+        untracked = 1,
+        tracked = 2,
+    };
+};
+
+/// https://developer.apple.com/documentation/metal/mtlprimitivetype?language=objc
+pub const MTLPrimitiveType = enum(c_ulong) {
+    point = 0,
+    line = 1,
+    line_strip = 2,
+    triangle = 3,
+    triangle_strip = 4,
+};
+
+/// https://developer.apple.com/documentation/metal/mtlindextype?language=objc
+pub const MTLIndexType = enum(c_ulong) {
+    uint16 = 0,
+    uint32 = 1,
+};
+
+/// https://developer.apple.com/documentation/metal/mtlvertexformat?language=objc
+pub const MTLVertexFormat = enum(c_ulong) {
+    invalid = 0,
+    uchar2 = 1,
+    uchar3 = 2,
+    uchar4 = 3,
+    char2 = 4,
+    char3 = 5,
+    char4 = 6,
+    uchar2normalized = 7,
+    uchar3normalized = 8,
+    uchar4normalized = 9,
+    char2normalized = 10,
+    char3normalized = 11,
+    char4normalized = 12,
+    ushort2 = 13,
+    ushort3 = 14,
+    ushort4 = 15,
+    short2 = 16,
+    short3 = 17,
+    short4 = 18,
+    ushort2normalized = 19,
+    ushort3normalized = 20,
+    ushort4normalized = 21,
+    short2normalized = 22,
+    short3normalized = 23,
+    short4normalized = 24,
+    half2 = 25,
+    half3 = 26,
+    half4 = 27,
+    float = 28,
+    float2 = 29,
+    float3 = 30,
+    float4 = 31,
+    int = 32,
+    int2 = 33,
+    int3 = 34,
+    int4 = 35,
+    uint = 36,
+    uint2 = 37,
+    uint3 = 38,
+    uint4 = 39,
+    int1010102normalized = 40,
+    uint1010102normalized = 41,
+    uchar4normalized_bgra = 42,
+    uchar = 45,
+    char = 46,
+    ucharnormalized = 47,
+    charnormalized = 48,
+    ushort = 49,
+    short = 50,
+    ushortnormalized = 51,
+    shortnormalized = 52,
+    half = 53,
+    floatrg11b10 = 54,
+    floatrgb9e5 = 55,
+};
+
+/// https://developer.apple.com/documentation/metal/mtlvertexstepfunction?language=objc
+pub const MTLVertexStepFunction = enum(c_ulong) {
+    constant = 0,
+    per_vertex = 1,
+    per_instance = 2,
+    per_patch = 3,
+    per_patch_control_point = 4,
+};
+
+/// https://developer.apple.com/documentation/metal/mtlpixelformat?language=objc
+pub const MTLPixelFormat = enum(c_ulong) {
+    invalid = 0,
+    a8unorm = 1,
+    r8unorm = 10,
+    r8unorm_srgb = 11,
+    r8snorm = 12,
+    r8uint = 13,
+    r8sint = 14,
+    r16unorm = 20,
+    r16snorm = 22,
+    r16uint = 23,
+    r16sint = 24,
+    r16float = 25,
+    rg8unorm = 30,
+    rg8unorm_srgb = 31,
+    rg8snorm = 32,
+    rg8uint = 33,
+    rg8sint = 34,
+    b5g6r5unorm = 40,
+    a1bgr5unorm = 41,
+    abgr4unorm = 42,
+    bgr5a1unorm = 43,
+    r32uint = 53,
+    r32sint = 54,
+    r32float = 55,
+    rg16unorm = 60,
+    rg16snorm = 62,
+    rg16uint = 63,
+    rg16sint = 64,
+    rg16float = 65,
+    rgba8unorm = 70,
+    rgba8unorm_srgb = 71,
+    rgba8snorm = 72,
+    rgba8uint = 73,
+    rgba8sint = 74,
+    bgra8unorm = 80,
+    bgra8unorm_srgb = 81,
+    rgb10a2unorm = 90,
+    rgb10a2uint = 91,
+    rg11b10float = 92,
+    rgb9e5float = 93,
+    bgr10a2unorm = 94,
+    bgr10_xr = 554,
+    bgr10_xr_srgb = 555,
+    rg32uint = 103,
+    rg32sint = 104,
+    rg32float = 105,
+    rgba16unorm = 110,
+    rgba16snorm = 112,
+    rgba16uint = 113,
+    rgba16sint = 114,
+    rgba16float = 115,
+    bgra10_xr = 552,
+    bgra10_xr_srgb = 553,
+    rgba32uint = 123,
+    rgba32sint = 124,
+    rgba32float = 125,
+    bc1_rgba = 130,
+    bc1_rgba_srgb = 131,
+    bc2_rgba = 132,
+    bc2_rgba_srgb = 133,
+    bc3_rgba = 134,
+    bc3_rgba_srgb = 135,
+    bc4_runorm = 140,
+    bc4_rsnorm = 141,
+    bc5_rgunorm = 142,
+    bc5_rgsnorm = 143,
+    bc6h_rgbfloat = 150,
+    bc6h_rgbufloat = 151,
+    bc7_rgbaunorm = 152,
+    bc7_rgbaunorm_srgb = 153,
+    pvrtc_rgb_2bpp = 160,
+    pvrtc_rgb_2bpp_srgb = 161,
+    pvrtc_rgb_4bpp = 162,
+    pvrtc_rgb_4bpp_srgb = 163,
+    pvrtc_rgba_2bpp = 164,
+    pvrtc_rgba_2bpp_srgb = 165,
+    pvrtc_rgba_4bpp = 166,
+    pvrtc_rgba_4bpp_srgb = 167,
+    eac_r11unorm = 170,
+    eac_r11snorm = 172,
+    eac_rg11unorm = 174,
+    eac_rg11snorm = 176,
+    eac_rgba8 = 178,
+    eac_rgba8_srgb = 179,
+    etc2_rgb8 = 180,
+    etc2_rgb8_srgb = 181,
+    etc2_rgb8a1 = 182,
+    etc2_rgb8a1_srgb = 183,
+    astc_4x4_srgb = 186,
+    astc_5x4_srgb = 187,
+    astc_5x5_srgb = 188,
+    astc_6x5_srgb = 189,
+    astc_6x6_srgb = 190,
+    astc_8x5_srgb = 192,
+    astc_8x6_srgb = 193,
+    astc_8x8_srgb = 194,
+    astc_10x5_srgb = 195,
+    astc_10x6_srgb = 196,
+    astc_10x8_srgb = 197,
+    astc_10x10_srgb = 198,
+    astc_12x10_srgb = 199,
+    astc_12x12_srgb = 200,
+    astc_4x4_ldr = 204,
+    astc_5x4_ldr = 205,
+    astc_5x5_ldr = 206,
+    astc_6x5_ldr = 207,
+    astc_6x6_ldr = 208,
+    astc_8x5_ldr = 210,
+    astc_8x6_ldr = 211,
+    astc_8x8_ldr = 212,
+    astc_10x5_ldr = 213,
+    astc_10x6_ldr = 214,
+    astc_10x8_ldr = 215,
+    astc_10x10_ldr = 216,
+    astc_12x10_ldr = 217,
+    astc_12x12_ldr = 218,
+    astc_4x4_hdr = 222,
+    astc_5x4_hdr = 223,
+    astc_5x5_hdr = 224,
+    astc_6x5_hdr = 225,
+    astc_6x6_hdr = 226,
+    astc_8x5_hdr = 228,
+    astc_8x6_hdr = 229,
+    astc_8x8_hdr = 230,
+    astc_10x5_hdr = 231,
+    astc_10x6_hdr = 232,
+    astc_10x8_hdr = 233,
+    astc_10x10_hdr = 234,
+    astc_12x10_hdr = 235,
+    astc_12x12_hdr = 236,
+    gbgr422 = 240,
+    bgrg422 = 241,
+    depth16unorm = 250,
+    depth32float = 252,
+    stencil8 = 253,
+    depth24unorm_stencil8 = 255,
+    depth32float_stencil8 = 260,
+    x32_stencil8 = 261,
+    x24_stencil8 = 262,
+};
+
+/// https://developer.apple.com/documentation/metal/mtlpurgeablestate?language=objc
+pub const MTLPurgeableState = enum(c_ulong) {
+    keep_current = 1,
+    non_volatile = 2,
+    @"volatile" = 3,
+    empty = 4,
+};
+
+/// https://developer.apple.com/documentation/metal/mtlsamplerminmagfilter?language=objc
+pub const MTLSamplerMinMagFilter = enum(c_ulong) {
+    nearest = 0,
+    linear = 1,
+};
+
+/// https://developer.apple.com/documentation/metal/mtlsampleraddressmode?language=objc
+pub const MTLSamplerAddressMode = enum(c_ulong) {
+    clamp_to_edge = 0,
+    mirror_clamp_to_edge = 1,
+    repeat = 2,
+    mirror_repeat = 3,
+    clamp_to_zero = 4,
+    clamp_to_border_color = 5,
+};
+
+/// https://developer.apple.com/documentation/metal/mtlblendfactor?language=objc
+pub const MTLBlendFactor = enum(c_ulong) {
+    zero = 0,
+    one = 1,
+    source_color = 2,
+    one_minus_source_color = 3,
+    source_alpha = 4,
+    one_minus_source_alpha = 5,
+    dest_color = 6,
+    one_minus_dest_color = 7,
+    dest_alpha = 8,
+    one_minus_dest_alpha = 9,
+    source_alpha_saturated = 10,
+    blend_color = 11,
+    one_minus_blend_color = 12,
+    blend_alpha = 13,
+    one_minus_blend_alpha = 14,
+    source_1_color = 15,
+    one_minus_source_1_color = 16,
+    source_1_alpha = 17,
+    one_minus_source_1_alpha = 18,
+};
+
+/// https://developer.apple.com/documentation/metal/mtlblendoperation?language=objc
+pub const MTLBlendOperation = enum(c_ulong) {
+    add = 0,
+    subtract = 1,
+    reverse_subtract = 2,
+    min = 3,
+    max = 4,
+};
+
+/// https://developer.apple.com/documentation/metal/mtltextureusage?language=objc
+pub const MTLTextureUsage = packed struct(c_ulong) {
+    /// https://developer.apple.com/documentation/metal/mtltextureusage/shaderread?language=objc
+    shader_read: bool = false, // TextureUsageShaderRead = 1,
+
+    /// https://developer.apple.com/documentation/metal/mtltextureusage/shaderwrite?language=objc
+    shader_write: bool = false, // TextureUsageShaderWrite = 2,
+
+    /// https://developer.apple.com/documentation/metal/mtltextureusage/rendertarget?language=objc
+    render_target: bool = false, // TextureUsageRenderTarget = 4,
+
+    _reserved: u1 = 0, // The enum skips from 4 to 16, 8 has no documented use.
+
+    /// https://developer.apple.com/documentation/metal/mtltextureusage/pixelformatview?language=objc
+    pixel_format_view: bool = false, // TextureUsagePixelFormatView = 16,
+
+    /// https://developer.apple.com/documentation/metal/mtltextureusage/shaderatomic?language=objc
+    shader_atomic: bool = false, // TextureUsageShaderAtomic = 32,
+
+    __reserved: @Type(.{ .int = .{
+        .signedness = .unsigned,
+        .bits = @bitSizeOf(c_ulong) - 6,
+    } }) = 0,
+
+    /// https://developer.apple.com/documentation/metal/mtltextureusage/unknown?language=objc
+    const unknown: MTLTextureUsage = @bitCast(0); // TextureUsageUnknown = 0,
+};
+
+/// https://developer.apple.com/documentation/metal/mtlbarrierscope?language=objc
+pub const MTLBarrierScope = enum(c_ulong) {
+    buffers = 1,
+    textures = 2,
+    render_targets = 4,
+};
+
+/// https://developer.apple.com/documentation/metal/mtlrenderstages?language=objc
+pub const MTLRenderStage = enum(c_ulong) {
+    vertex = 1,
+    fragment = 2,
+    tile = 4,
+    object = 8,
+    mesh = 16,
+};
+
+/// https://developer.apple.com/documentation/metal/mtlgpufamily?language=objc
+pub const MTLGPUFamily = enum(c_long) {
+    apple1 = 1001,
+    apple2 = 1002,
+    apple3 = 1003,
+    apple4 = 1004,
+    apple5 = 1005,
+    apple6 = 1006,
+    apple7 = 1007,
+    apple8 = 1008,
+    apple9 = 1009,
+    apple10 = 1010,
+
+    common1 = 3001,
+    common2 = 3002,
+    common3 = 3003,
+
+    metal3 = 5001,
+    metal4 = 5002,
+};
+
+pub const MTLClearColor = extern struct {
+    red: f64,
+    green: f64,
+    blue: f64,
+    alpha: f64,
+};
+
+pub const MTLViewport = extern struct {
+    x: f64,
+    y: f64,
+    width: f64,
+    height: f64,
+    znear: f64,
+    zfar: f64,
+};
+
+pub const MTLRegion = extern struct {
+    origin: MTLOrigin,
+    size: MTLSize,
+};
+
+pub const MTLOrigin = extern struct {
+    x: c_ulong,
+    y: c_ulong,
+    z: c_ulong,
+};
+
+pub const MTLSize = extern struct {
+    width: c_ulong,
+    height: c_ulong,
+    depth: c_ulong,
+};
+
+/// https://developer.apple.com/documentation/metal/1433367-mtlcopyalldevices
+pub extern "c" fn MTLCopyAllDevices() ?*anyopaque;
+
+/// https://developer.apple.com/documentation/metal/1433401-mtlcreatesystemdefaultdevice
+pub extern "c" fn MTLCreateSystemDefaultDevice() ?*anyopaque;