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font/coretext: log the variation axes in debug mode

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This commit is contained in:
Mitchell Hashimoto
2023-08-27 10:54:31 -07:00
parent 9d0729f17c
commit 16808f2b35
1 changed files with 47 additions and 16 deletions
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63
src/font/face/coretext.zig
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@ -1,4 +1,5 @@
const std = @import("std");
const builtin = @import("builtin");
const assert = std.debug.assert;
const Allocator = std.mem.Allocator;
const macos = @import("macos");
@ -75,22 +76,6 @@ pub const Face = struct {
const traits = ct_font.getSymbolicTraits();
// Get variation axes
// if (ct_font.copyAttribute(.variation_axes)) |axes| {
// defer axes.release();
// const len = axes.getCount();
// for (0..len) |i| {
// const dict = axes.getValueAtIndex(macos.foundation.Dictionary, i);
// const Key = macos.text.FontVariationAxisKey;
// const name_ = dict.getValue(Key.name.Value(), Key.name.key());
// if (name_) |name_val| {
// var buf: [1024]u8 = undefined;
// const namestr = name_val.cstring(&buf, .utf8) orelse "";
// log.warn("AXES: {s}", .{namestr});
// }
// }
// }
var result: Face = .{
.font = ct_font,
.hb_font = hb_font,
@ -98,6 +83,52 @@ pub const Face = struct {
.metrics = try calcMetrics(ct_font),
};
result.quirks_disable_default_font_features = quirks.disableDefaultFontFeatures(&result);
// In debug mode, we output information about available variation axes,
// if they exist.
if (comptime builtin.mode == .Debug) {
if (ct_font.copyAttribute(.variation_axes)) |axes| {
defer axes.release();
var buf: [1024]u8 = undefined;
log.debug("variation axes font={s}", .{try result.name(&buf)});
const len = axes.getCount();
for (0..len) |i| {
const dict = axes.getValueAtIndex(macos.foundation.Dictionary, i);
const Key = macos.text.FontVariationAxisKey;
const cf_name = dict.getValue(Key.name.Value(), Key.name.key()).?;
const cf_id = dict.getValue(Key.identifier.Value(), Key.identifier.key()).?;
const cf_min = dict.getValue(Key.minimum_value.Value(), Key.minimum_value.key()).?;
const cf_max = dict.getValue(Key.maximum_value.Value(), Key.maximum_value.key()).?;
const cf_def = dict.getValue(Key.default_value.Value(), Key.default_value.key()).?;
const namestr = cf_name.cstring(&buf, .utf8) orelse "";
var id_raw: c_int = 0;
_ = cf_id.getValue(.int, &id_raw);
const id: font.face.Variation.Id = @bitCast(id_raw);
var min: f64 = 0;
_ = cf_min.getValue(.double, &min);
var max: f64 = 0;
_ = cf_max.getValue(.double, &max);
var def: f64 = 0;
_ = cf_def.getValue(.double, &def);
log.debug("variation axis: name={s} id={s} min={} max={} def={}", .{
namestr,
id.str(),
min,
max,
def,
});
}
}
}
return result;
}