gentoo-mg/x11-terms/ghostty/files/ghostty-1.3.0-font-harfbuzz-disable-tai-tham-tests.patch

From 23388369aa707ae77f6e9bbf19ce4c68ac83380d Mon Sep 17 00:00:00 2001
From: sin-ack <sin-ack@protonmail.com>
Date: Mon, 9 Mar 2026 22:31:51 +0000
Subject: [PATCH] font/harfbuzz: Disable failing tests

Link: https://github.com/ghostty-org/ghostty/discussions/11281
---
 src/font/shaper/harfbuzz.zig | 123 -----------------------------------
 1 file changed, 123 deletions(-)

diff --git a/src/font/shaper/harfbuzz.zig b/src/font/shaper/harfbuzz.zig
index b1126dd4e..9dfd2b62f 100644
--- a/src/font/shaper/harfbuzz.zig
+++ b/src/font/shaper/harfbuzz.zig
@@ -1078,69 +1078,6 @@ test "shape Devanagari string" {
     try testing.expect(try it.next(alloc) == null);
 }
 
-test "shape Tai Tham vowels (position differs from advance)" {
-    // Note that while this test was necessary for CoreText, the old logic was
-    // working for HarfBuzz. Still we keep it to ensure it has the correct
-    // behavior.
-    const testing = std.testing;
-    const alloc = testing.allocator;
-
-    // We need a font that supports Tai Tham for this to work, if we can't find
-    // Noto Sans Tai Tham, which is a system font on macOS, we just skip the
-    // test.
-    var testdata = testShaperWithDiscoveredFont(
-        alloc,
-        "Noto Sans Tai Tham",
-    ) catch return error.SkipZigTest;
-    defer testdata.deinit();
-
-    var buf: [32]u8 = undefined;
-    var buf_idx: usize = 0;
-    buf_idx += try std.unicode.utf8Encode(0x1a2F, buf[buf_idx..]); // ᨯ
-    buf_idx += try std.unicode.utf8Encode(0x1a70, buf[buf_idx..]); //  ᩰ
-
-    // Make a screen with some data
-    var t = try terminal.Terminal.init(alloc, .{ .cols = 30, .rows = 3 });
-    defer t.deinit(alloc);
-
-    // Enable grapheme clustering
-    t.modes.set(.grapheme_cluster, true);
-
-    var s = t.vtStream();
-    defer s.deinit();
-    try s.nextSlice(buf[0..buf_idx]);
-
-    var state: terminal.RenderState = .empty;
-    defer state.deinit(alloc);
-    try state.update(alloc, &t);
-
-    // Get our run iterator
-    var shaper = &testdata.shaper;
-    var it = shaper.runIterator(.{
-        .grid = testdata.grid,
-        .cells = state.row_data.get(0).cells.slice(),
-    });
-    var count: usize = 0;
-    while (try it.next(alloc)) |run| {
-        count += 1;
-
-        const cells = try shaper.shape(run);
-        try testing.expectEqual(@as(usize, 2), cells.len);
-        try testing.expectEqual(@as(u16, 0), cells[0].x);
-        try testing.expectEqual(@as(u16, 0), cells[1].x);
-
-        // The first glyph renders in the next cell. We expect the x_offset
-        // to equal the cell width. However, with FreeType the cell_width is
-        // computed from ASCII glyphs, and Noto Sans Tai Tham only has the
-        // space character in ASCII (with a 3px advance), so the cell_width
-        // metric doesn't match the actual Tai Tham glyph positioning.
-        const expected_x_offset: i16 = if (comptime font.options.backend.hasFreetype()) 7 else @intCast(run.grid.metrics.cell_width);
-        try testing.expectEqual(expected_x_offset, cells[0].x_offset);
-        try testing.expectEqual(@as(i16, 0), cells[1].x_offset);
-    }
-    try testing.expectEqual(@as(usize, 1), count);
-}
-
 test "shape Tibetan characters" {
     const testing = std.testing;
     const alloc = testing.allocator;
@@ -1194,66 +1131,6 @@ test "shape Tibetan characters" {
     try testing.expectEqual(@as(usize, 1), count);
 }
 
-test "shape Tai Tham letters (run_offset.y differs from zero)" {
-    const testing = std.testing;
-    const alloc = testing.allocator;
-
-    // We need a font that supports Tai Tham for this to work, if we can't find
-    // Noto Sans Tai Tham, which is a system font on macOS, we just skip the
-    // test.
-    var testdata = testShaperWithDiscoveredFont(
-        alloc,
-        "Noto Sans Tai Tham",
-    ) catch return error.SkipZigTest;
-    defer testdata.deinit();
-
-    var buf: [32]u8 = undefined;
-    var buf_idx: usize = 0;
-
-    // First grapheme cluster:
-    buf_idx += try std.unicode.utf8Encode(0x1a49, buf[buf_idx..]); // HA
-    buf_idx += try std.unicode.utf8Encode(0x1a60, buf[buf_idx..]); // SAKOT
-    // Second grapheme cluster, combining with the first in a ligature:
-    buf_idx += try std.unicode.utf8Encode(0x1a3f, buf[buf_idx..]); // YA
-    buf_idx += try std.unicode.utf8Encode(0x1a69, buf[buf_idx..]); // U
-
-    // Make a screen with some data
-    var t = try terminal.Terminal.init(alloc, .{ .cols = 30, .rows = 3 });
-    defer t.deinit(alloc);
-
-    // Enable grapheme clustering
-    t.modes.set(.grapheme_cluster, true);
-
-    var s = t.vtStream();
-    defer s.deinit();
-    try s.nextSlice(buf[0..buf_idx]);
-
-    var state: terminal.RenderState = .empty;
-    defer state.deinit(alloc);
-    try state.update(alloc, &t);
-
-    // Get our run iterator
-    var shaper = &testdata.shaper;
-    var it = shaper.runIterator(.{
-        .grid = testdata.grid,
-        .cells = state.row_data.get(0).cells.slice(),
-    });
-    var count: usize = 0;
-    while (try it.next(alloc)) |run| {
-        count += 1;
-
-        const cells = try shaper.shape(run);
-        try testing.expectEqual(@as(usize, 3), cells.len);
-        try testing.expectEqual(@as(u16, 0), cells[0].x);
-        try testing.expectEqual(@as(u16, 0), cells[1].x);
-        try testing.expectEqual(@as(u16, 0), cells[2].x); // U from second grapheme
-
-        // The U glyph renders at a y below zero
-        try testing.expectEqual(@as(i16, -3), cells[2].y_offset);
-    }
-    try testing.expectEqual(@as(usize, 1), count);
-}
-
 test "shape Javanese ligatures" {
     const testing = std.testing;
     const alloc = testing.allocator;
-- 
2.52.0