Applied-Software/ghostty
5
0
Fork 0
mirror of https://github.com/ghostty-org/ghostty.git synced 2025-07-24 20:56:08 +03:00
Code Issues Packages Projects Releases Wiki Activity

font: discovery descriptor can be hashed

Browse Source
This commit is contained in:
Mitchell Hashimoto
2023-09-24 11:17:07 -07:00
parent 4e54c5389e
commit 6b640c2d9f
1 changed files with 39 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
src/font/discovery.zig
View File

@ -56,6 +56,30 @@ pub const Descriptor = struct {
/// will be preferred, but not guaranteed.
variations: []const Variation = &.{},
/// Returns a hash code that can be used to uniquely identify this
/// action.
pub fn hash(self: Descriptor) u64 {
const autoHash = std.hash.autoHash;
var hasher = std.hash.Wyhash.init(0);
autoHash(&hasher, self.family);
autoHash(&hasher, self.style);
autoHash(&hasher, self.codepoint);
autoHash(&hasher, self.size);
autoHash(&hasher, self.bold);
autoHash(&hasher, self.italic);
autoHash(&hasher, self.monospace);
autoHash(&hasher, self.variations.len);
for (self.variations) |variation| {
autoHash(&hasher, variation.id);
// This is not correct, but we don't currently depend on the
// hash value being different based on decimal values of variations.
autoHash(&hasher, @as(u64, @intFromFloat(variation.value)));
}
return hasher.final();
}
/// Convert to Fontconfig pattern to use for lookup. The pattern does
/// not have defaults filled/substituted (Fontconfig thing) so callers
/// must still do this.
@ -350,6 +374,21 @@ pub const CoreText = struct {
};
};
test "descriptor hash" {
const testing = std.testing;
var d: Descriptor = .{};
try testing.expect(d.hash() != 0);
}
test "descriptor hash familiy names" {
const testing = std.testing;
var d1: Descriptor = .{ .family = "A" };
var d2: Descriptor = .{ .family = "B" };
try testing.expect(d1.hash() != d2.hash());
}
test "fontconfig" {
if (options.backend != .fontconfig_freetype) return error.SkipZigTest;