BlackMark
36b861d167
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>
36 lines
1.5 KiB
C++
36 lines
1.5 KiB
C++
// Injected Present-hook video path: hooks IDXGISwapChain::Present in the target
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// game, copies the swapchain backbuffer into a shared keyed-mutex texture
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// (coop_video_<pid>), and publishes its dimensions/format to the host over IPC.
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// The host opens that texture by name and samples it -- a lower-latency, more
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// stable alternative to Windows Graphics Capture (which composites off the
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// desktop and can stutter / show a capture border).
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//
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// Only DXGI swapchains (D3D10/11/12-backed games) are caught; the backbuffer
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// must be an ID3D11Texture2D (the common D3D11 case). Games on D3D9 or a pure
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// D3D12 resource path won't engage this hook -- WGC stays as the fallback.
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#pragma once
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#include "ipc_client.hpp"
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namespace coop::hook
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{
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// Installs the Present hook. Grabs IDXGISwapChain::Present from a throwaway
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// swapchain and inline-hooks it, so every swapchain in the process is caught.
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// `ipc` must outlive the hook (used to publish the shared-texture descriptor).
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// Returns true once the hook is in place; safe to call repeatedly.
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bool install_present_hooks(IpcClient& ipc);
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// Removes the Present hook and releases the shared texture (best effort).
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void remove_present_hooks();
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// --- Diagnostics (used by the self-test) -----------------------------------
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// Cumulative Present() detours observed.
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std::uint64_t present_calls();
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// Frames actually copied into the shared texture (a backbuffer we could share).
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std::uint64_t present_frames_shared();
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} // namespace coop::hook
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