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Phase 2: Present-hook video path (shared-texture mirror)

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Add an injected IDXGISwapChain::Present / Present1 hook as a lower-latency,
border-free alternative to WGC. The hook copies the swapchain backbuffer into a
shared keyed-mutex texture (coop_video_<pid>); the host opens it by name and
samples it. New opt-in HookSubsys_Video (protocol v6 -> v7); the Video mirror
panel gains a WGC vs Hooked source toggle that installs/removes the subsystem.

Verified by present_hook_test (drives a real D3D11 swapchain end-to-end and reads
the rendered pixels back through the shared texture) and against Phantom Brave
(D3D9: hook installs cleanly and stays idle, WGC fallback). All 5 tests pass.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
BlackMark
2026-06-20 11:34:12 +02:00
parent 9557b9ca69
commit 36b861d167
21 changed files with 1160 additions and 36 deletions
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16
host/src/ipc/ipc_server.cpp
View File

@@ -88,6 +88,22 @@ HookStatusView IpcServer::hook_status() const
return view;
}
VideoShareView IpcServer::video_share() const
{
VideoShareView v;
if (block_ == nullptr)
{
return v;
}
const VideoShare& s = block_->video;
v.generation = s.generation.load(std::memory_order_acquire);
v.width = s.width;
v.height = s.height;
v.format = s.format;
v.present_calls = s.present_calls;
return v;
}
void IpcServer::set_subsystem_enabled(std::uint32_t subsystem, bool enabled)
{
if (block_ != nullptr && subsystem < HookSubsys_Count)