segatools/gfxhook/dxgi.c

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#include <windows.h>
#include <dxgi.h>
#include <dxgi1_3.h>
#include <assert.h>
#include <stdlib.h>
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#include "gfxhook/dxgi.h"
#include "gfxhook/gfx.h"
#include "hook/com-proxy.h"
#include "hook/table.h"
#include "hooklib/dll.h"
#include "util/dprintf.h"
typedef HRESULT (WINAPI *CreateDXGIFactory_t)(REFIID riid, void **factory);
typedef HRESULT (WINAPI *CreateDXGIFactory1_t)(REFIID riid, void **factory);
typedef HRESULT (WINAPI *CreateDXGIFactory2_t)(
UINT flags,
REFIID riid,
void **factory);
static HRESULT hook_factory(REFIID riid, void **factory);
static HRESULT STDMETHODCALLTYPE my_IDXGIFactory_CreateSwapChain(
IDXGIFactory *self,
IUnknown *device,
DXGI_SWAP_CHAIN_DESC *desc,
IDXGISwapChain **swapchain);
static HRESULT STDMETHODCALLTYPE my_IDXGIFactory1_CreateSwapChain(
IDXGIFactory1 *self,
IUnknown *device,
DXGI_SWAP_CHAIN_DESC *desc,
IDXGISwapChain **swapchain);
static HRESULT STDMETHODCALLTYPE my_IDXGIFactory2_CreateSwapChain(
IDXGIFactory2 *self,
IUnknown *device,
DXGI_SWAP_CHAIN_DESC *desc,
IDXGISwapChain **swapchain);
static struct gfx_config gfx_config;
static CreateDXGIFactory_t next_CreateDXGIFactory;
static CreateDXGIFactory1_t next_CreateDXGIFactory1;
static CreateDXGIFactory2_t next_CreateDXGIFactory2;
static const struct hook_symbol dxgi_hooks[] = {
{
.name = "CreateDXGIFactory",
.patch = CreateDXGIFactory,
.link = (void **) &next_CreateDXGIFactory,
}, {
.name = "CreateDXGIFactory1",
.patch = CreateDXGIFactory1,
.link = (void **) &next_CreateDXGIFactory1,
}, {
.name = "CreateDXGIFactory2",
.patch = CreateDXGIFactory2,
.link = (void **) &next_CreateDXGIFactory2,
},
};
void gfx_dxgi_hook_init(const struct gfx_config *cfg, HINSTANCE self)
{
HMODULE dxgi;
assert(cfg != NULL);
if (!cfg->enable) {
return;
}
memcpy(&gfx_config, cfg, sizeof(*cfg));
hook_table_apply(NULL, "dxgi.dll", dxgi_hooks, _countof(dxgi_hooks));
if (next_CreateDXGIFactory == NULL || next_CreateDXGIFactory1 == NULL) {
dxgi = LoadLibraryW(L"dxgi.dll");
if (dxgi == NULL) {
dprintf("DXGI: dxgi.dll not found or failed initialization\n");
goto fail;
}
if (next_CreateDXGIFactory == NULL) {
next_CreateDXGIFactory = (CreateDXGIFactory_t) GetProcAddress(
dxgi,
"CreateDXGIFactory");
}
if (next_CreateDXGIFactory1 == NULL) {
next_CreateDXGIFactory1 = (CreateDXGIFactory1_t) GetProcAddress(
dxgi,
"CreateDXGIFactory1");
}
if (next_CreateDXGIFactory2 == NULL) {
next_CreateDXGIFactory2 = (CreateDXGIFactory2_t) GetProcAddress(
dxgi,
"CreateDXGIFactory2");
}
if (next_CreateDXGIFactory == NULL) {
dprintf("DXGI: CreateDXGIFactory not found in loaded dxgi.dll\n");
goto fail;
}
if (next_CreateDXGIFactory1 == NULL) {
dprintf("DXGI: CreateDXGIFactory1 not found in loaded dxgi.dll\n");
goto fail;
}
/* `CreateDXGIFactory2` was introduced in Windows 8.1 and the original
* Nu runs Windows 8, so do not require it to exist */
}
if (self != NULL) {
dll_hook_push(self, L"dxgi.dll");
}
return;
fail:
if (dxgi != NULL) {
FreeLibrary(dxgi);
}
}
HRESULT WINAPI CreateDXGIFactory(REFIID riid, void **factory)
{
HRESULT hr;
dprintf("DXGI: CreateDXGIFactory hook hit\n");
hr = next_CreateDXGIFactory(riid, factory);
if (FAILED(hr)) {
dprintf("DXGI: CreateDXGIFactory returned %x\n", (int) hr);
return hr;
}
hr = hook_factory(riid, factory);
if (FAILED(hr)) {
return hr;
}
return hr;
}
HRESULT WINAPI CreateDXGIFactory1(REFIID riid, void **factory)
{
HRESULT hr;
dprintf("DXGI: CreateDXGIFactory1 hook hit\n");
hr = next_CreateDXGIFactory1(riid, factory);
if (FAILED(hr)) {
dprintf("DXGI: CreateDXGIFactory1 returned %x\n", (int) hr);
return hr;
}
hr = hook_factory(riid, factory);
if (FAILED(hr)) {
return hr;
}
return hr;
}
HRESULT WINAPI CreateDXGIFactory2(UINT flags, REFIID riid, void **factory)
{
HRESULT hr;
dprintf("DXGI: CreateDXGIFactory2 hook hit\n");
if (next_CreateDXGIFactory2 == NULL) {
dprintf("DXGI: CreateDXGIFactory2 not available, forwarding to CreateDXGIFactory1\n");
return CreateDXGIFactory1(riid, factory);
}
hr = next_CreateDXGIFactory2(flags, riid, factory);
if (FAILED(hr)) {
dprintf("DXGI: CreateDXGIFactory2 returned %x\n", (int) hr);
return hr;
}
hr = hook_factory(riid, factory);
if (FAILED(hr)) {
return hr;
}
return hr;
}
static HRESULT hook_factory(REFIID riid, void **factory)
{
struct com_proxy *proxy;
IDXGIFactory *api_0;
IDXGIFactory1 *api_1;
IDXGIFactory2 *api_2;
IDXGIFactoryVtbl *vtbl_0;
IDXGIFactory1Vtbl *vtbl_1;
IDXGIFactory2Vtbl *vtbl_2;
HRESULT hr;
api_0 = NULL;
api_1 = NULL;
api_2 = NULL;
if (memcmp(riid, &IID_IDXGIFactory, sizeof(*riid)) == 0) {
api_0 = *factory;
hr = com_proxy_wrap(&proxy, api_0, sizeof(*api_0->lpVtbl));
if (FAILED(hr)) {
dprintf("DXGI: com_proxy_wrap returned %x\n", (int) hr);
goto fail;
}
vtbl_0 = proxy->vptr;
vtbl_0->CreateSwapChain = my_IDXGIFactory_CreateSwapChain;
*factory = proxy;
} else if (memcmp(riid, &IID_IDXGIFactory1, sizeof(*riid)) == 0) {
api_1 = *factory;
hr = com_proxy_wrap(&proxy, api_1, sizeof(*api_1->lpVtbl));
if (FAILED(hr)) {
dprintf("DXGI: com_proxy_wrap returned %x\n", (int) hr);
goto fail;
}
vtbl_1 = proxy->vptr;
vtbl_1->CreateSwapChain = my_IDXGIFactory1_CreateSwapChain;
*factory = proxy;
} else if (memcmp(riid, &IID_IDXGIFactory2, sizeof(*riid)) == 0) {
api_2 = *factory;
hr = com_proxy_wrap(&proxy, api_2, sizeof(*api_2->lpVtbl));
if (FAILED(hr)) {
dprintf("DXGI: com_proxy_wrap returned %x\n", (int) hr);
goto fail;
}
vtbl_2 = proxy->vptr;
vtbl_2->CreateSwapChain = my_IDXGIFactory2_CreateSwapChain;
*factory = proxy;
}
return S_OK;
fail:
if (api_0 != NULL) {
IDXGIFactory_Release(api_0);
}
if (api_1 != NULL) {
IDXGIFactory1_Release(api_1);
}
if (api_2 != NULL) {
IDXGIFactory2_Release(api_2);
}
return hr;
}
static HRESULT STDMETHODCALLTYPE my_IDXGIFactory_CreateSwapChain(
IDXGIFactory *self,
IUnknown *device,
DXGI_SWAP_CHAIN_DESC *desc,
IDXGISwapChain **swapchain)
{
struct com_proxy *proxy;
IDXGIFactory *real;
HWND hwnd;
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UINT width;
UINT height;
dprintf("DXGI: IDXGIFactory::CreateSwapChain hook hit\n");
proxy = com_proxy_downcast(self);
real = proxy->real;
if (desc != NULL) {
desc->Windowed = gfx_config.windowed;
hwnd = desc->OutputWindow;
width = desc->BufferDesc.Width;
height = desc->BufferDesc.Height;
} else {
hwnd = NULL;
}
if (hwnd != NULL) {
/*
* Ensure window is maximized to avoid a Windows 10 issue where a
* fullscreen swap chain is not created because the window is minimized
* at the time of creation.
*/
ShowWindow(hwnd, SW_RESTORE);
if (!gfx_config.framed && width > 0 && height > 0) {
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dprintf("DXGI: Resizing window to %ux%u\n", width, height);
SetWindowLongPtrW(hwnd, GWL_STYLE, WS_POPUP);
SetWindowLongPtrW(hwnd, GWL_EXSTYLE, WS_EX_TOPMOST);
SetWindowPos(
hwnd,
HWND_TOP,
0,
0,
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(int) width,
(int) height,
SWP_FRAMECHANGED | SWP_NOSENDCHANGING);
ShowWindow(hwnd, SW_SHOWMAXIMIZED);
}
}
return IDXGIFactory_CreateSwapChain(real, device, desc, swapchain);
}
static HRESULT STDMETHODCALLTYPE my_IDXGIFactory1_CreateSwapChain(
IDXGIFactory1 *self,
IUnknown *device,
DXGI_SWAP_CHAIN_DESC *desc,
IDXGISwapChain **swapchain)
{
dprintf("DXGI: IDXGIFactory1::CreateSwapChain hook forwarding to my_IDXGIFactory_CreateSwapChain\n");
return my_IDXGIFactory_CreateSwapChain(
(IDXGIFactory *) self,
device,
desc,
swapchain);
}
static HRESULT STDMETHODCALLTYPE my_IDXGIFactory2_CreateSwapChain(
IDXGIFactory2 *self,
IUnknown *device,
DXGI_SWAP_CHAIN_DESC *desc,
IDXGISwapChain **swapchain)
{
dprintf("DXGI: IDXGIFactory2::CreateSwapChain hook forwarding to my_IDXGIFactory_CreateSwapChain\n");
return my_IDXGIFactory_CreateSwapChain(
(IDXGIFactory *) self,
device,
desc,
swapchain);
}