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M2(Vulkan): capture hook via GPA interception + vkCmdCopyImageToBuffer read-back

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New vk_hook.cpp inline-hooks the vulkan-1.dll vkGetInstanceProcAddr export and
hands back our wrappers for vkCreateInstance / vkCreateDevice / vkGetDeviceProcAddr
/ vkCreateSwapchainKHR / vkQueuePresentKHR, so a volk-using (loader-bypass) app
resolves our hooks. On present it reads the swap-chain image back with
vkCmdCopyImageToBuffer into a host-visible buffer (same read-back model as
D3D10/D3D9/OpenGL), swizzles BGRA->RGBA, and uploads it into the shared
keyed-mutex texture on a hook-owned D3D11 device. The read-back submit re-chains
the present's wait semaphores (consume the originals, signal our own that the
real present waits on) so capture orders after rendering without double-waiting.

Wired into the video subsystem with a lazy retry (vulkan-1.dll loads late). Hook
links the official Vulkan-Headers (headers only, VK_NO_PROTOTYPES) via the
include dir so the x86 sub-build builds too.

Because Vulkan caches its present pointer at init, late injection can't hook it:
mock_game_test launches the mock **suspended**, injects, resumes, and under
COOP_MOCK_VK_EARLY the mock loads Vulkan and waits so the hook arms first -- then
decodes frames through the hook like the other backends. 15/15 ctest (x64 +
x86); skips cleanly without a Vulkan driver.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
BlackMark
2026-06-22 12:39:07 +02:00
parent d4a83e75bb
commit dd976979a1
6 changed files with 875 additions and 26 deletions
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7
hook/CMakeLists.txt
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@@ -6,6 +6,7 @@ add_library(coop_hook SHARED
src/present_hook.cpp
src/opengl_hook.cpp
src/d3d9_hook.cpp
src/vk_hook.cpp
src/mkb_hook.cpp
src/debug_log.cpp
src/hook_registry.cpp)
@@ -16,6 +17,12 @@ target_include_directories(coop_hook PRIVATE src)
# the Windows 10 20H1 (NTDDI_WIN10_CO) headers.
target_compile_definitions(coop_hook PRIVATE NTDDI_VERSION=0x0A00000B)
# Vulkan headers only (the hook resolves entry points itself, VK_NO_PROTOTYPES). Use the include
# dir directly rather than the third_party `vulkan_headers` target, so the x86 sub-build -- which
# doesn't add third_party/ -- still builds the hook.
coop_require_submodule("Vulkan-Headers" "third_party/Vulkan-Headers/include/vulkan/vulkan.h")
target_include_directories(coop_hook PRIVATE ${CMAKE_SOURCE_DIR}/third_party/Vulkan-Headers/include)
target_link_libraries(coop_hook PRIVATE
coop_common
safetyhook::safetyhook