feat: finish ghostty pane backend integration

1 files changed, 64 insertions, 0 deletions

diff --git a/vendor/libghostty-vt/src/renderer/metal/Sampler.zig b/vendor/libghostty-vt/src/renderer/metal/Sampler.zig
new file mode 100644
index 00000000..593f9a86
--- /dev/null
+++ b/vendor/libghostty-vt/src/renderer/metal/Sampler.zig
@@ -0,0 +1,64 @@
+//! Wrapper for handling samplers.
+const Self = @This();
+
+const std = @import("std");
+const Allocator = std.mem.Allocator;
+const objc = @import("objc");
+
+const mtl = @import("api.zig");
+const Metal = @import("../Metal.zig");
+
+const log = std.log.scoped(.metal);
+
+/// Options for initializing a sampler.
+pub const Options = struct {
+    /// MTLDevice
+    device: objc.Object,
+    min_filter: mtl.MTLSamplerMinMagFilter,
+    mag_filter: mtl.MTLSamplerMinMagFilter,
+    s_address_mode: mtl.MTLSamplerAddressMode,
+    t_address_mode: mtl.MTLSamplerAddressMode,
+};
+
+/// The underlying MTLSamplerState Object.
+sampler: objc.Object,
+
+pub const Error = error{
+    /// A Metal API call failed.
+    MetalFailed,
+};
+
+/// Initialize a sampler
+pub fn init(
+    opts: Options,
+) Error!Self {
+    // Create our descriptor
+    const desc = init: {
+        const Class = objc.getClass("MTLSamplerDescriptor").?;
+        const id_alloc = Class.msgSend(objc.Object, objc.sel("alloc"), .{});
+        const id_init = id_alloc.msgSend(objc.Object, objc.sel("init"), .{});
+        break :init id_init;
+    };
+    defer desc.release();
+
+    // Properties
+    desc.setProperty("minFilter", opts.min_filter);
+    desc.setProperty("magFilter", opts.mag_filter);
+    desc.setProperty("sAddressMode", opts.s_address_mode);
+    desc.setProperty("tAddressMode", opts.t_address_mode);
+
+    // Create the sampler state
+    const id = opts.device.msgSend(
+        ?*anyopaque,
+        objc.sel("newSamplerStateWithDescriptor:"),
+        .{desc},
+    ) orelse return error.MetalFailed;
+
+    return .{
+        .sampler = objc.Object.fromId(id),
+    };
+}
+
+pub fn deinit(self: Self) void {
+    self.sampler.release();
+}