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LibGfx/OpenType: Extract read_tag() function

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Nico Weber 2024-02-28 08:16:41 -05:00 • committed by Tim Flynn
parent 93038f6f24
commit 86203974f5
1 changed files with 7 additions and 3 deletions
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10
Userland/Libraries/LibGfx/Font/OpenType/Font.cpp
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@ -156,14 +156,18 @@ ErrorOr<NonnullRefPtr<Font>> Font::try_load_from_resource(Core::Resource const&
return font;
}
ErrorOr<NonnullRefPtr<Font>> Font::try_load_from_externally_owned_memory(ReadonlyBytes buffer, Options options)
static ErrorOr<Tag> read_tag(ReadonlyBytes buffer)
{
FixedMemoryStream stream { buffer };
return stream.read_value<Tag>();
}
auto tag = TRY(stream.read_value<Tag>());
ErrorOr<NonnullRefPtr<Font>> Font::try_load_from_externally_owned_memory(ReadonlyBytes buffer, Options options)
{
auto tag = TRY(read_tag(buffer));
if (tag == Tag("ttcf")) {
// It's a font collection
TRY(stream.seek(0, SeekMode::SetPosition));
FixedMemoryStream stream { buffer };
auto ttc_header_v1 = TRY(stream.read_in_place<TTCHeaderV1>());
// FIXME: Check for major_version == 2.