font: move codepoint into a public API

src/font/FallbackSet.zig

@@ -12,6 +12,7 @@ const Atlas = @import("../Atlas.zig");
 const Family = @import("main.zig").Family;
 const Glyph = @import("main.zig").Glyph;
 const Style = @import("main.zig").Style;
+const codepoint = @import("main.zig").codepoint;
 
 const ftok = ftc.FT_Err_Ok;
 const log = std.log.scoped(.font_fallback);
@@ -54,7 +55,7 @@ pub fn getOrAddGlyph(
     assert(self.families.items.len > 0);
 
     // We need a UTF32 codepoint
-    const utf32 = Family.codepoint(v);
+    const utf32 = codepoint(v);
 
     // If we have this already, load it directly
     const glyphKey: GlyphKey = .{ .style = style, .codepoint = utf32 };

src/font/Family.zig

@@ -11,6 +11,7 @@ const Face = @import("main.zig").Face;
 const Glyph = @import("main.zig").Glyph;
 const Style = @import("main.zig").Style;
 const testFont = @import("test.zig").fontRegular;
+const codepoint = @import("main.zig").codepoint;
 
 const log = std.log.scoped(.font_family);
 
@@ -141,17 +142,6 @@ pub fn addGlyph(self: *Family, alloc: Allocator, v: anytype, style: Style) !*Gly
     return gop.value_ptr;
 }
 
-/// Returns the UTF-32 codepoint for the given value.
-pub fn codepoint(v: anytype) u32 {
-    // We need a UTF32 codepoint for freetype
-    return switch (@TypeOf(v)) {
-        u32 => v,
-        comptime_int, u8 => @intCast(u32, v),
-        []const u8 => @intCast(u32, try std.unicode.utfDecode(v)),
-        else => @compileError("invalid codepoint type"),
-    };
-}
-
 test {
     const testing = std.testing;
     const alloc = testing.allocator;

src/font/main.zig

@@ -1,3 +1,5 @@
+const std = @import("std");
+
 pub const Face = @import("Face.zig");
 pub const Family = @import("Family.zig");
 pub const Glyph = @import("Glyph.zig");
@@ -15,6 +17,17 @@ pub const Style = enum {
     bold_italic,
 };
 
+/// Returns the UTF-32 codepoint for the given value.
+pub fn codepoint(v: anytype) u32 {
+    // We need a UTF32 codepoint for freetype
+    return switch (@TypeOf(v)) {
+        u32 => v,
+        comptime_int, u8 => @intCast(u32, v),
+        []const u8 => @intCast(u32, try std.unicode.utfDecode(v)),
+        else => @compileError("invalid codepoint type"),
+    };
+}
+
 test {
     _ = Face;
     _ = Family;