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Draft: hooklib/gfx/dxgi.c: Add CreateDXGIFactory2 hook

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This commit is contained in:
Felix Anderson 2021-10-25 21:52:35 +00:00
parent b072f2d82a
commit 636ed0f41b
Signed by untrusted user: felix
GPG Key ID: 69ADF8AEB6C8B5D1
1 changed files with 88 additions and 0 deletions
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88
hooklib/gfx/dxgi.c
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@ -1,5 +1,6 @@
#include <windows.h>
#include <dxgi.h>
#include <dxgi1_3.h>
#include <assert.h>
#include <stdlib.h>
@ -15,6 +16,10 @@
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 STDMETHODCALLTYPE my_IDXGIFactory_CreateSwapChain(
IDXGIFactory *self,
@ -26,10 +31,16 @@ static HRESULT STDMETHODCALLTYPE my_IDXGIFactory1_CreateSwapChain(
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[] = {
{
@ -40,6 +51,10 @@ static const struct hook_symbol dxgi_hooks[] = {
.name = "CreateDXGIFactory1",
.patch = CreateDXGIFactory1,
.link = (void **) &next_CreateDXGIFactory1,
}, {
.name = "CreateDXGIFactory2",
.patch = CreateDXGIFactory2,
.link = (void **) &next_CreateDXGIFactory2,
},
};
@ -75,6 +90,11 @@ void gfx_dxgi_hook_init(const struct gfx_config *cfg, HINSTANCE self)
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");
@ -86,6 +106,9 @@ void gfx_dxgi_hook_init(const struct gfx_config *cfg, HINSTANCE self)
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) {
@ -188,6 +211,56 @@ fail:
return hr;
}
HRESULT WINAPI CreateDXGIFactory2(UINT flags, REFIID riid, void **factory)
{
struct com_proxy *proxy;
IDXGIFactory2 *api;
IDXGIFactory2Vtbl *vtbl;
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);
}
api = NULL;
hr = next_CreateDXGIFactory2(flags, riid, factory);
if (FAILED(hr)) {
dprintf("DXGI: CreateDXGIFactory2 returned %x\n", (int) hr);
goto fail;
}
if (memcmp(riid, &IID_IDXGIFactory2, sizeof(*riid)) == 0) {
api = *factory;
hr = com_proxy_wrap(&proxy, api, sizeof(*api->lpVtbl));
if (FAILED(hr)) {
dprintf("DXGI: com_proxy_wrap returned %x\n", (int) hr);
goto fail;
}
vtbl = proxy->vptr;
vtbl->CreateSwapChain = my_IDXGIFactory2_CreateSwapChain;
*factory = proxy;
}
return hr;
fail:
if (api != NULL) {
IDXGIFactory2_Release(api);
}
return hr;
}
static HRESULT STDMETHODCALLTYPE my_IDXGIFactory_CreateSwapChain(
IDXGIFactory *self,
IUnknown *device,
@ -261,3 +334,18 @@ static HRESULT STDMETHODCALLTYPE my_IDXGIFactory1_CreateSwapChain(
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);
}