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added opengl hook

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Orange
2026-05-06 20:05:45 +03:00
parent 29255cbb0e
commit d90164cab8
8 changed files with 257 additions and 7 deletions
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1
.idea/editor.xml generated
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@@ -139,6 +139,7 @@
<option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppNotAllPathsReturnValue/@EntryIndexedValue" value="WARNING" type="string" />
<option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppObjectMemberMightNotBeInitialized/@EntryIndexedValue" value="WARNING" type="string" />
<option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppOutParameterMustBeWritten/@EntryIndexedValue" value="WARNING" type="string" />
<option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppOverrideWithDifferentVisibility/@EntryIndexedValue" value="WARNING" type="string" />
<option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppParameterMayBeConst/@EntryIndexedValue" value="HINT" type="string" />
<option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppParameterMayBeConstPtrOrRef/@EntryIndexedValue" value="SUGGESTION" type="string" />
<option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppParameterNamesMismatch/@EntryIndexedValue" value="HINT" type="string" />

2
.idea/omath.iml generated
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@@ -1,2 +0,0 @@
<?xml version="1.0" encoding="UTF-8"?>
<module classpath="CIDR" type="CPP_MODULE" version="4" />

4
CMakeLists.txt
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@@ -32,7 +32,7 @@ option(OMATH_ENABLE_FORCE_INLINE
"Will for compiler to make some functions to be force inlined no matter what" ON)
option(OMATH_ENABLE_LUA
"omath bindings for lua" OFF)
option(OMATH_ENABLE_HOOKING "omath will HooksManager that can hook DirectX automatically" OFF)
option(OMATH_ENABLE_HOOKING "omath will HooksManager that can hook DirectX/OpenGL automatically" OFF)
if(VCPKG_MANIFEST_FEATURES)
foreach(omath_feature IN LISTS VCPKG_MANIFEST_FEATURES)
@@ -113,7 +113,7 @@ if (OMATH_ENABLE_HOOKING)
target_link_libraries(${PROJECT_NAME} PRIVATE safetyhook::safetyhook)
if (WIN32)
target_link_libraries(${PROJECT_NAME} PRIVATE d3d9 d3d11 d3d12 dxgi)
target_link_libraries(${PROJECT_NAME} PRIVATE d3d9 d3d11 d3d12 dxgi opengl32 gdi32)
endif ()
endif ()

7
examples/CMakeLists.txt
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@@ -5,15 +5,16 @@ add_subdirectory(example_signature_scan)
add_subdirectory(example_hud)
if(OMATH_ENABLE_HOOKING AND WIN32)
# Requires imgui with dx9-binding, dx11-binding, dx12-binding, win32-binding.
# Install via: vcpkg install imgui[dx9-binding,dx11-binding,dx12-binding,win32-binding]
# Requires imgui with dx9-binding, dx11-binding, dx12-binding, opengl3-binding, win32-binding.
# Install via: vcpkg install imgui[dx9-binding,dx11-binding,dx12-binding,opengl3-binding,win32-binding]
find_package(imgui CONFIG QUIET)
if(imgui_FOUND)
add_subdirectory(example_dx9_hook)
add_subdirectory(example_dx11_hook)
add_subdirectory(example_dx12_hook)
add_subdirectory(example_opengl_hook)
else()
message(STATUS "[omath] imgui not found — DX hook examples skipped")
message(STATUS "[omath] imgui not found - hook examples skipped")
endif()
endif()

13
examples/example_opengl_hook/CMakeLists.txt Normal file
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@@ -0,0 +1,13 @@
project(example_opengl_hook)
add_library(${PROJECT_NAME} MODULE dllmain.cpp)
set_target_properties(${PROJECT_NAME} PROPERTIES
CXX_STANDARD 23
MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>"
ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/out/${CMAKE_BUILD_TYPE}"
LIBRARY_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/out/${CMAKE_BUILD_TYPE}"
RUNTIME_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/out/${CMAKE_BUILD_TYPE}")
find_package(imgui CONFIG REQUIRED)
target_link_libraries(${PROJECT_NAME} PRIVATE omath::omath imgui::imgui opengl32 gdi32)

116
examples/example_opengl_hook/dllmain.cpp Normal file
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@@ -0,0 +1,116 @@
#include "omath/hooks/hooks_manager.hpp"
#include <Windows.h>
#include <chrono>
#include <imgui.h>
#include <imgui_impl_opengl3.h>
#include <imgui_impl_win32.h>
#include <optional>
#include <thread>
extern IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND, UINT, WPARAM, LPARAM);
namespace
{
bool g_initialized = false;
bool g_init_attempted = false;
bool g_show_menu = true;
constexpr auto g_module_wait_delay = std::chrono::milliseconds{100};
void init(HDC hdc)
{
g_init_attempted = true;
const HWND hwnd = WindowFromDC(hdc);
if (!hwnd)
return;
ImGui::CreateContext();
ImGui::StyleColorsDark();
ImGui::GetIO().IniFilename = nullptr;
ImGui::GetIO().LogFilename = nullptr;
ImGui::GetIO().ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange;
ImGui_ImplWin32_Init(hwnd);
ImGui_ImplOpenGL3_Init();
auto& mgr = omath::hooks::HooksManager::get();
mgr.set_on_wnd_proc(
[](HWND h, UINT msg, WPARAM wp, LPARAM lp) -> std::optional<LRESULT>
{
if (!g_show_menu)
return std::nullopt;
if (ImGui_ImplWin32_WndProcHandler(h, msg, wp, lp))
return 0;
return std::nullopt;
});
(void)mgr.hook_wnd_proc(hwnd);
g_initialized = true;
}
void on_swap_buffers(HDC hdc)
{
if (!g_initialized)
{
if (!g_init_attempted)
init(hdc);
return;
}
if (GetAsyncKeyState(VK_INSERT) & 1)
g_show_menu = !g_show_menu;
ImGui_ImplOpenGL3_NewFrame();
ImGui_ImplWin32_NewFrame();
ImGui::NewFrame();
if (g_show_menu)
{
ImGui::SetNextWindowSize({300.f, 100.f}, ImGuiCond_Once);
ImGui::SetNextWindowPos({10.f, 10.f}, ImGuiCond_Once);
ImGui::Begin("omath | OpenGL hook");
ImGui::Text("Hook active");
ImGui::Text("FPS: %.1f", ImGui::GetIO().Framerate);
ImGui::Text("INSERT toggles this window");
ImGui::End();
}
ImGui::Render();
ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
}
void hook_when_opengl_is_loaded()
{
while (!GetModuleHandle("opengl32.dll"))
std::this_thread::sleep_for(g_module_wait_delay);
auto& mgr = omath::hooks::HooksManager::get();
mgr.set_on_opengl_swap_buffers(on_swap_buffers);
(void)mgr.hook_opengl();
}
} // namespace
BOOL WINAPI DllMain(HINSTANCE h_instance, DWORD reason, LPVOID)
{
if (reason == DLL_PROCESS_ATTACH)
{
DisableThreadLibraryCalls(h_instance);
std::thread{hook_when_opengl_is_loaded}.detach();
}
else if (reason == DLL_PROCESS_DETACH)
{
auto& mgr = omath::hooks::HooksManager::get();
mgr.unhook_wnd_proc();
mgr.unhook_opengl();
if (g_initialized)
{
ImGui_ImplOpenGL3_Shutdown();
ImGui_ImplWin32_Shutdown();
ImGui::DestroyContext();
}
}
return true;
}

18
include/omath/hooks/hooks_manager.hpp
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@@ -37,6 +37,9 @@ namespace omath::hooks
using dx9_reset_callback = std::function<void(IDirect3DDevice9*, D3DPRESENT_PARAMETERS*)>;
using dx9_end_scene_callback = std::function<void(IDirect3DDevice9*)>;
// OpenGL callbacks. Fires before the hooked buffer swap function calls the original.
using opengl_swap_buffers_callback = std::function<void(HDC)>;
// Return nullopt to pass the message to the original WndProc; return a value to intercept it.
using wnd_proc_callback = std::function<std::optional<LRESULT>(HWND, UINT, WPARAM, LPARAM)>;
@@ -57,6 +60,10 @@ namespace omath::hooks
[[nodiscard]] bool hook_dx12();
void unhook_dx12();
[[nodiscard]] bool hook_opengl();
void unhook_opengl();
void set_on_opengl_swap_buffers(opengl_swap_buffers_callback callback);
// Present and ResizeBuffers callbacks fire for whichever of DX11/DX12 is hooked.
void set_on_present(present_callback callback);
void set_on_resize_buffers(resize_buffers_callback callback);
@@ -91,6 +98,11 @@ namespace omath::hooks
UINT num_command_lists,
ID3D12CommandList* const* pp_command_lists);
[[nodiscard]]
static BOOL __stdcall opengl_wgl_swap_buffers_detour(HDC hdc);
[[nodiscard]]
static BOOL __stdcall opengl_swap_buffers_detour(HDC hdc);
[[nodiscard]]
static LRESULT __stdcall wnd_proc_detour(HWND hwnd, UINT msg, WPARAM w_param, LPARAM l_param);
@@ -104,11 +116,13 @@ namespace omath::hooks
mutable std::shared_mutex m_resize_buffers_mutex;
mutable std::shared_mutex m_execute_command_lists_mutex;
mutable std::shared_mutex m_opengl_swap_buffers_mutex;
mutable std::shared_mutex m_wnd_proc_mutex;
bool m_is_dx9_hooked = false;
bool m_is_dx11_hooked = false;
bool m_is_dx12_hooked = false;
bool m_is_opengl_hooked = false;
bool m_is_wnd_proc_hooked = false;
HWND m_hooked_hwnd = nullptr;
@@ -125,6 +139,9 @@ namespace omath::hooks
safetyhook::InlineHook m_dx12_resize_buffers_hook;
safetyhook::InlineHook m_dx12_execute_command_lists_hook;
safetyhook::InlineHook m_opengl_wgl_swap_buffers_hook;
safetyhook::InlineHook m_opengl_swap_buffers_hook;
dx9_present_callback m_dx9_present_cb;
dx9_reset_callback m_dx9_reset_cb;
dx9_end_scene_callback m_dx9_end_scene_cb;
@@ -132,6 +149,7 @@ namespace omath::hooks
present_callback m_present_cb;
resize_buffers_callback m_resize_buffers_cb;
execute_command_lists_callback m_execute_command_lists_cb;
opengl_swap_buffers_callback m_opengl_swap_buffers_cb;
wnd_proc_callback m_wnd_proc_cb;
};
} // namespace omath::hooks

103
source/hooks/hooks_manager.cpp
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@@ -5,6 +5,8 @@
namespace
{
thread_local bool g_is_inside_opengl_swap_buffers = false;
class DummyWindow final
{
WNDCLASSEX m_window_class{};
@@ -43,6 +45,15 @@ namespace
return (*reinterpret_cast<void***>(com_obj))[index];
}
void* module_proc(const char* module_name, const char* proc_name)
{
const HMODULE module = GetModuleHandle(module_name);
if (!module)
return nullptr;
return reinterpret_cast<void*>(GetProcAddress(module, proc_name));
}
struct dx12_vtable_fns
{
void* present;
@@ -169,6 +180,7 @@ namespace omath::hooks
unhook_dx9();
unhook_dx11();
unhook_dx12();
unhook_opengl();
}
bool HooksManager::hook_dx9()
@@ -381,6 +393,49 @@ namespace omath::hooks
m_is_dx12_hooked = false;
}
bool HooksManager::hook_opengl()
{
std::unique_lock lock(m_hook_state_mutex);
if (m_is_opengl_hooked)
return true;
if (void* wgl_swap_buffers = module_proc("opengl32.dll", "wglSwapBuffers"))
{
m_opengl_wgl_swap_buffers_hook = safetyhook::create_inline(
wgl_swap_buffers, reinterpret_cast<void*>(&opengl_wgl_swap_buffers_detour));
}
if (void* swap_buffers = module_proc("gdi32.dll", "SwapBuffers"))
{
m_opengl_swap_buffers_hook =
safetyhook::create_inline(swap_buffers, reinterpret_cast<void*>(&opengl_swap_buffers_detour));
}
if (!m_opengl_wgl_swap_buffers_hook && !m_opengl_swap_buffers_hook)
{
m_opengl_wgl_swap_buffers_hook = {};
m_opengl_swap_buffers_hook = {};
return false;
}
m_is_opengl_hooked = true;
return true;
}
void HooksManager::unhook_opengl()
{
std::unique_lock lock(m_hook_state_mutex);
m_opengl_wgl_swap_buffers_hook = {};
m_opengl_swap_buffers_hook = {};
m_is_opengl_hooked = false;
}
void HooksManager::set_on_opengl_swap_buffers(opengl_swap_buffers_callback callback)
{
std::unique_lock lock(m_opengl_swap_buffers_mutex);
m_opengl_swap_buffers_cb = std::move(callback);
}
void HooksManager::set_on_present(present_callback callback)
{
std::unique_lock lock(m_present_mutex);
@@ -553,6 +608,54 @@ namespace omath::hooks
mgr.m_dx12_execute_command_lists_hook.call<void>(p_command_queue, num_command_lists, pp_command_lists);
}
BOOL __stdcall HooksManager::opengl_wgl_swap_buffers_detour(HDC hdc)
{
auto& mgr = get();
if (!g_is_inside_opengl_swap_buffers)
{
g_is_inside_opengl_swap_buffers = true;
opengl_swap_buffers_callback cb;
{
std::shared_lock lock(mgr.m_opengl_swap_buffers_mutex);
cb = mgr.m_opengl_swap_buffers_cb;
}
if (cb)
cb(hdc);
const BOOL result = mgr.m_opengl_wgl_swap_buffers_hook.call<BOOL>(hdc);
g_is_inside_opengl_swap_buffers = false;
return result;
}
return mgr.m_opengl_wgl_swap_buffers_hook.call<BOOL>(hdc);
}
BOOL __stdcall HooksManager::opengl_swap_buffers_detour(HDC hdc)
{
auto& mgr = get();
if (!g_is_inside_opengl_swap_buffers)
{
g_is_inside_opengl_swap_buffers = true;
opengl_swap_buffers_callback cb;
{
std::shared_lock lock(mgr.m_opengl_swap_buffers_mutex);
cb = mgr.m_opengl_swap_buffers_cb;
}
if (cb)
cb(hdc);
const BOOL result = mgr.m_opengl_swap_buffers_hook.call<BOOL>(hdc);
g_is_inside_opengl_swap_buffers = false;
return result;
}
return mgr.m_opengl_swap_buffers_hook.call<BOOL>(hdc);
}
LRESULT __stdcall HooksManager::wnd_proc_detour(HWND hwnd, UINT msg, WPARAM w_param, LPARAM l_param)
{
auto& mgr = get();