f68d6d2636
The compositor IPC path needs to send display-list resources across a process boundary without losing the resource IDs referenced by display-list commands. The previous transaction shape carried font and image-frame objects whose IDs are process-local and would be regenerated after decoding. Store explicit IDs with font and image-frame transaction entries and add IPC serializers that rebuild the resource objects while preserving those IDs. Fonts now serialize through Gfx::Typeface IPC, image frames use shareable bitmaps, and video frames keep their existing ID-bearing transaction entry. This lets the receiver apply the regular transaction directly. This is preparatory work required to add IPC between the main and compositor threads.
50 lines
1.4 KiB
C++
50 lines
1.4 KiB
C++
/*
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* Copyright (c) 2025, 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 <AK/Vector.h>
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#include <LibIPC/Decoder.h>
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#include <LibIPC/Encoder.h>
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#include <LibWeb/Painting/ScrollState.h>
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namespace Web::Painting {
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ScrollStateSnapshot ScrollStateSnapshot::create(Vector<ScrollFrame> const& scroll_frames, double device_pixels_per_css_pixel)
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{
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ScrollStateSnapshot snapshot;
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auto scale = static_cast<float>(device_pixels_per_css_pixel);
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snapshot.m_device_offsets.ensure_capacity(scroll_frames.size());
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for (auto const& scroll_frame : scroll_frames) {
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auto const& offset = scroll_frame.own_offset();
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snapshot.m_device_offsets.unchecked_append(offset.to_type<float>() * scale);
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}
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return snapshot;
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}
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ScrollStateSnapshot ScrollStateSnapshot::create_from_device_offsets(Vector<Gfx::FloatPoint>&& device_offsets)
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{
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ScrollStateSnapshot snapshot;
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snapshot.m_device_offsets = move(device_offsets);
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return snapshot;
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}
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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::Painting::ScrollStateSnapshot const& snapshot)
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{
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TRY(encoder.encode(snapshot.device_offsets()));
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return {};
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}
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template<>
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ErrorOr<Web::Painting::ScrollStateSnapshot> decode(Decoder& decoder)
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{
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return Web::Painting::ScrollStateSnapshot::create_from_device_offsets(TRY(decoder.decode<Vector<Gfx::FloatPoint>>()));
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}
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}
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