mirror of
https://github.com/LadybirdBrowser/ladybird
synced 2026-04-26 01:35:08 +02:00
3cb644500e
Now that LibIPC uses Mach ports for transport on macOS, IOSurface port rights can be sent as regular IPC message attachments instead of through a separate ad-hoc Mach message side-channel. Introduce Web::SharedBackingStore that wraps either a MachPort (macOS) or ShareableBitmap (other platforms) with IPC encode/decode support, unifying backing store allocation into the existing did_allocate_backing_stores IPC message.
65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
/*
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* Copyright (c) 2026, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibIPC/Attachment.h>
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#include <LibIPC/Decoder.h>
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#include <LibIPC/Encoder.h>
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#include <LibWeb/Page/SharedBackingStore.h>
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#if defined(AK_OS_MACOS)
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static Core::MachPort copy_send_right(Core::MachPort const& port)
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{
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auto result = mach_port_mod_refs(mach_task_self(), port.port(), MACH_PORT_RIGHT_SEND, +1);
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VERIFY(result == KERN_SUCCESS);
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return Core::MachPort::adopt_right(port.port(), Core::MachPort::PortRight::Send);
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}
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#endif
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namespace Web {
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#if defined(AK_OS_MACOS)
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SharedBackingStore::SharedBackingStore(Core::MachPort&& port)
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: m_port(move(port))
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{
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}
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#else
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SharedBackingStore::SharedBackingStore(Gfx::ShareableBitmap bitmap)
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: m_bitmap(move(bitmap))
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{
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}
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#endif
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}
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namespace IPC {
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template<>
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ErrorOr<void> encode(Encoder& encoder, Web::SharedBackingStore const& backing_store)
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{
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#if defined(AK_OS_MACOS)
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auto port = copy_send_right(backing_store.m_port);
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TRY(encoder.append_attachment(Attachment::from_mach_port(move(port), Core::MachPort::MessageRight::MoveSend)));
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#else
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TRY(encoder.encode(backing_store.m_bitmap));
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#endif
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return {};
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}
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template<>
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ErrorOr<Web::SharedBackingStore> decode(Decoder& decoder)
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{
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#if defined(AK_OS_MACOS)
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auto attachment = decoder.attachments().dequeue();
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VERIFY(attachment.message_right() == Core::MachPort::MessageRight::MoveSend);
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return Web::SharedBackingStore { attachment.release_mach_port() };
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#else
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auto bitmap = TRY(decoder.decode<Gfx::ShareableBitmap>());
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return Web::SharedBackingStore { move(bitmap) };
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#endif
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}
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}
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