LibGfx: Add `Core::File` variant of `BitmapFont::write_to_file`

Userland/Libraries/LibGfx/Font/BitmapFont.cpp

@@ -245,6 +245,14 @@ ErrorOr<NonnullRefPtr<BitmapFont>> BitmapFont::try_load_from_mapped_file(RefPtr<
 }
 
 ErrorOr<void> BitmapFont::write_to_file(DeprecatedString const& path)
+{
+    auto stream = TRY(Core::File::open(path, Core::File::OpenMode::Write));
+    TRY(write_to_file(move(stream)));
+
+    return {};
+}
+
+ErrorOr<void> BitmapFont::write_to_file(NonnullOwnPtr<Core::File> file)
 {
     FontFileHeader header;
     memset(&header, 0, sizeof(FontFileHeader));
@@ -262,12 +270,11 @@ ErrorOr<void> BitmapFont::write_to_file(DeprecatedString const& path)
     memcpy(header.name, m_name.characters(), min(m_name.length(), sizeof(header.name) - 1));
     memcpy(header.family, m_family.characters(), min(m_family.length(), sizeof(header.family) - 1));
 
-    auto stream = TRY(Core::File::open(path, Core::File::OpenMode::Write));
     size_t bytes_per_glyph = sizeof(u32) * m_glyph_height;
-    TRY(stream->write_until_depleted({ &header, sizeof(header) }));
-    TRY(stream->write_until_depleted({ m_range_mask, m_range_mask_size }));
-    TRY(stream->write_until_depleted({ m_rows, m_glyph_count * bytes_per_glyph }));
-    TRY(stream->write_until_depleted({ m_glyph_widths, m_glyph_count }));
+    TRY(file->write_until_depleted({ &header, sizeof(header) }));
+    TRY(file->write_until_depleted({ m_range_mask, m_range_mask_size }));
+    TRY(file->write_until_depleted({ m_rows, m_glyph_count * bytes_per_glyph }));
+    TRY(file->write_until_depleted({ m_glyph_widths, m_glyph_count }));
 
     return {};
 }

Userland/Libraries/LibGfx/Font/BitmapFont.h

@@ -33,7 +33,9 @@ public:
     static RefPtr<BitmapFont> load_from_file(DeprecatedString const& path);
     static ErrorOr<NonnullRefPtr<BitmapFont>> try_load_from_file(DeprecatedString const& path);
     static ErrorOr<NonnullRefPtr<BitmapFont>> try_load_from_mapped_file(RefPtr<Core::MappedFile> const&);
+
     ErrorOr<void> write_to_file(DeprecatedString const& path);
+    ErrorOr<void> write_to_file(NonnullOwnPtr<Core::File> file);
 
     ~BitmapFont();