Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: 93712b24bf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibGfx/Font/WOFF2/Loader.cpp

@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2024, Andreas Kling <andreas@ladybird.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibGfx/Font/Typeface.h>
+#include <LibGfx/Font/WOFF2/Loader.h>
+#include <woff2/decode.h>
+
+namespace WOFF2 {
+
+class WOFF2ByteBufferOut final : public woff2::WOFF2Out {
+public:
+    explicit WOFF2ByteBufferOut(ByteBuffer& buffer)
+        : m_buffer(buffer)
+    {
+    }
+
+    // Append n bytes of data from buf.
+    // Return true if all written, false otherwise.
+    virtual bool Write(void const* data, size_t size) override
+    {
+        auto result = m_buffer.try_append(static_cast<u8 const*>(data), size);
+        if (result.is_error()) {
+            VERIFY_NOT_REACHED();
+        }
+        return true;
+    }
+
+    // Write n bytes of data from buf at offset.
+    // Return true if all written, false otherwise.
+    virtual bool Write(void const* data, size_t offset, size_t n) override
+    {
+        if (Checked<size_t>::addition_would_overflow(offset, n)) {
+            return false;
+        }
+        if (offset + n > m_buffer.size()) {
+            if (m_buffer.try_resize(offset + n).is_error()) {
+                return false;
+            }
+        }
+        memcpy(m_buffer.offset_pointer(offset), data, n);
+        return true;
+    }
+
+    virtual size_t Size() override
+    {
+        return m_buffer.size();
+    }
+
+private:
+    ByteBuffer& m_buffer;
+};
+
+ErrorOr<NonnullRefPtr<Gfx::Typeface>> try_load_from_externally_owned_memory(ReadonlyBytes bytes)
+{
+    auto ttf_buffer = TRY(ByteBuffer::create_uninitialized(0));
+    auto output = WOFF2ByteBufferOut { ttf_buffer };
+    auto result = woff2::ConvertWOFF2ToTTF(bytes.data(), bytes.size(), &output);
+    if (!result) {
+        return Error::from_string_literal("Failed to convert the WOFF2 font to TTF");
+    }
+
+    auto font_data = Gfx::FontData::create_from_byte_buffer(move(ttf_buffer));
+    auto input_font = TRY(Gfx::Typeface::try_load_from_font_data(move(font_data)));
+    return input_font;
+}
+
+}