feat: finish ghostty pane backend integration

1 files changed, 32 insertions, 0 deletions

diff --git a/vendor/libghostty-vt/pkg/opengl/extensions.zig b/vendor/libghostty-vt/pkg/opengl/extensions.zig
new file mode 100644
index 00000000..5fdbada9
--- /dev/null
+++ b/vendor/libghostty-vt/pkg/opengl/extensions.zig
@@ -0,0 +1,32 @@
+const std = @import("std");
+const c = @import("c.zig").c;
+const errors = @import("errors.zig");
+const glad = @import("glad.zig");
+
+/// Returns the number of extensions.
+pub fn len() !u32 {
+    var n: c.GLint = undefined;
+    glad.context.GetIntegerv.?(c.GL_NUM_EXTENSIONS, &n);
+    try errors.getError();
+    return @intCast(n);
+}
+
+/// Returns an iterator for the extensions.
+pub fn iterator() !Iterator {
+    return Iterator{ .len = try len() };
+}
+
+/// Iterator for the available extensions.
+pub const Iterator = struct {
+    /// The total number of extensions.
+    len: c.GLuint = 0,
+    i: c.GLuint = 0,
+
+    pub fn next(self: *Iterator) !?[]const u8 {
+        if (self.i >= self.len) return null;
+        const res = glad.context.GetStringi.?(c.GL_EXTENSIONS, self.i);
+        try errors.getError();
+        self.i += 1;
+        return std.mem.sliceTo(res, 0);
+    }
+};