BlackMark
67c1940d52
New d3d9_hook.cpp (own file like opengl_hook): inline-hooks IDirect3DDevice9::Present (vtable index 17, discovered from a throwaway device; clean prologue so inline is safe, stdcall() on x86) and read-backs the backbuffer with GetRenderTargetData into a D3DPOOL_SYSTEMMEM surface, swizzles BGRA->RGBA, and uploads it into the shared keyed-mutex texture on a hook-owned D3D11 device (a D3D9 surface isn't D3D11-shareable). Both plain D3D9 and D3D9Ex call this same Present, so one read-back path serves both -- the GPU shared-surface fast path the plan sketched for D3D9Ex wasn't worth it. Wired into the video subsystem (install/remove in dllmain); hook links d3d9. mock_game_test decodes DX9 + DX9Ex frames through the hook; 15/15 ctest (incl. the x86 sub-build). Roadmap: DX9 milestone done and removed (remaining renumbered); architecture + lessons updated. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
31 lines
1.4 KiB
C++
31 lines
1.4 KiB
C++
// Injected D3D9 capture path: inline-hooks IDirect3DDevice9::Present (discovered from a
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// throwaway device's vtable, so it catches the game's existing device regardless of when we
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// injected) in Direct3D 9 / 9Ex games, which don't present via IDXGISwapChain. It reads the
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// backbuffer back with GetRenderTargetData, swizzles BGRA->RGBA, and uploads it into the same
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// shared keyed-mutex texture (coop_video_<pid>) the host samples. Part of the video subsystem,
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// alongside present_hook and opengl_hook.
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//
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// A D3D9 backbuffer isn't directly shareable with D3D11, so this is a CPU read-back
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// (GetRenderTargetData -> system memory -> upload via a hook-owned D3D11 device), like the
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// OpenGL path. Works for both plain D3D9 and D3D9Ex (both call Present here).
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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 D3D9 Present hook. `ipc` must outlive the hook. Returns true if Present was
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// hooked (i.e. d3d9.dll is present and a probe device came up). Safe to call repeatedly.
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bool install_d3d9_hooks(IpcClient& ipc);
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// Removes the D3D9 hook and releases the shared texture (best effort).
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void remove_d3d9_hooks();
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// --- Diagnostics -----------------------------------------------------------
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std::uint64_t d3d9_presents(); // cumulative IDirect3DDevice9::Present detours
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std::uint64_t d3d9_frames_shared(); // frames uploaded into the shared texture
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} // namespace coop::hook
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