From f07793aa0f7e3248d66f26b326245890ffb7747b Mon Sep 17 00:00:00 2001
From: Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
Date: Wed, 20 May 2026 23:52:16 +0200
Subject: [PATCH] LibGfx: Add IPC serialization for Path

The compositor IPC path needs to move vector paths without teaching Web
code about the path wire format. Declare the Path specialization on the
owning LibGfx type, then reuse the existing path byte serialization for
IPC encode and decode.

This is preparatory work required to add IPC between the main and
compositor threads.
---
 Libraries/LibGfx/Path.cpp | 19 +++++++++++++++++++
 Libraries/LibGfx/Path.h   | 11 +++++++++++
 2 files changed, 30 insertions(+)

diff --git a/Libraries/LibGfx/Path.cpp b/Libraries/LibGfx/Path.cpp
index 67474d8901..8758bd0274 100644
--- a/Libraries/LibGfx/Path.cpp
+++ b/Libraries/LibGfx/Path.cpp
@@ -6,6 +6,8 @@
 
 #include <LibGfx/Path.h>
 #include <LibGfx/PathSkia.h>
+#include <LibIPC/Decoder.h>
+#include <LibIPC/Encoder.h>
 
 namespace Gfx {
 
@@ -24,3 +26,20 @@ NonnullOwnPtr<Gfx::PathImpl> PathImpl::create()
 PathImpl::~PathImpl() = default;
 
 }
+
+namespace IPC {
+
+template<>
+ErrorOr<void> encode(Encoder& encoder, Gfx::Path const& path)
+{
+    return encoder.encode(path.serialize_to_bytes());
+}
+
+template<>
+ErrorOr<Gfx::Path> decode(Decoder& decoder)
+{
+    auto path_data = TRY(decoder.decode<Vector<u8>>());
+    return Gfx::Path::from_serialized_bytes(path_data);
+}
+
+}
diff --git a/Libraries/LibGfx/Path.h b/Libraries/LibGfx/Path.h
index 3ef00104b1..1526e01c8f 100644
--- a/Libraries/LibGfx/Path.h
+++ b/Libraries/LibGfx/Path.h
@@ -15,6 +15,7 @@
 #include <LibGfx/Point.h>
 #include <LibGfx/Rect.h>
 #include <LibGfx/WindingRule.h>
+#include <LibIPC/Forward.h>
 
 namespace Gfx {
 
@@ -140,3 +141,13 @@ private:
 };
 
 }
+
+namespace IPC {
+
+template<>
+ErrorOr<void> encode(Encoder&, Gfx::Path const&);
+
+template<>
+ErrorOr<Gfx::Path> decode(Decoder&);
+
+}