From b550efd4a99c5e7b0135a704459e89990d86a0b7 Mon Sep 17 00:00:00 2001
From: Tau <tau@nowhere>
Date: Tue, 5 Mar 2019 13:29:56 -0500
Subject: [PATCH] zinput: Add stub DirectInput implementation

Initial D Zero has some incomplete built-in PC input support, we
need to disable it so that it does not interfere with our JVS
emulation.
---
 meson.build        |   1 +
 precompiled.h      |   1 +
 zinput/dllmain.c   | 146 +++++++++++++++++++++++++++++++++++++++++++++
 zinput/meson.build |  17 ++++++
 zinput/zinput.def  |   4 ++
 5 files changed, 169 insertions(+)
 create mode 100644 zinput/dllmain.c
 create mode 100644 zinput/meson.build
 create mode 100644 zinput/zinput.def

diff --git a/meson.build b/meson.build
index 9a2a757..d74e52e 100644
--- a/meson.build
+++ b/meson.build
@@ -40,3 +40,4 @@ subdir('aimeio')
 subdir('cardhook')
 subdir('chunihook')
 subdir('minihook')
+subdir('zinput')
diff --git a/precompiled.h b/precompiled.h
index 24058e9..149b5ac 100644
--- a/precompiled.h
+++ b/precompiled.h
@@ -10,6 +10,7 @@
 #include <winternl.h>
 #include <setupapi.h>
 #include <unknwn.h>
+#include <dinput.h>
 #include <xinput.h>
 #include <d3d9.h>
 
diff --git a/zinput/dllmain.c b/zinput/dllmain.c
new file mode 100644
index 0000000..5ed8ad5
--- /dev/null
+++ b/zinput/dllmain.c
@@ -0,0 +1,146 @@
+#include <windows.h>
+#include <dinput.h>
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "hook/process.h"
+#include "hook/table.h"
+
+#include "util/dprintf.h"
+
+static unsigned long WINAPI my_AddRef(IUnknown *self);
+
+static unsigned long WINAPI my_Release(IUnknown *self);
+
+static HRESULT WINAPI my_CreateDevice(
+        IDirectInput8W *self,
+        REFGUID rguid,
+        LPDIRECTINPUTDEVICE8W * lplpDirectInputDevice,
+        LPUNKNOWN pUnkOuter);
+
+static HRESULT WINAPI my_EnumDevices(
+        IDirectInput8W *self,
+        DWORD dwDevType,
+        LPDIENUMDEVICESCALLBACKW lpCallback,
+        LPVOID pvRef,
+        DWORD dwFlags);
+
+static HRESULT WINAPI my_SetDataFormat(
+        IDirectInputDevice8W *self,
+        LPCDIDATAFORMAT lpdf);
+
+static HRESULT WINAPI my_SetCooperativeLevel(
+        IDirectInputDevice8W *self,
+        HWND hwnd,
+        DWORD flags);
+
+static HRESULT WINAPI my_Acquire(IDirectInputDevice8W *self);
+
+static HRESULT WINAPI my_GetDeviceState(
+        IDirectInputDevice8W *self,
+        DWORD cbData,
+        LPVOID lpvData);
+
+static const IDirectInput8WVtbl api_vtbl = {
+    .AddRef             = (void *) my_AddRef,
+    .Release            = (void *) my_Release,
+    .CreateDevice       = my_CreateDevice,
+    .EnumDevices        = my_EnumDevices,
+};
+
+static const IDirectInput8W api = { (void *) &api_vtbl };
+
+static const IDirectInputDevice8WVtbl dev_vtbl = {
+    .AddRef             = (void *) my_AddRef,
+    .Release            = (void *) my_Release,
+    .SetDataFormat      = my_SetDataFormat,
+    .SetCooperativeLevel= my_SetCooperativeLevel,
+    .Acquire            = my_Acquire,
+    .Unacquire          = my_Acquire, // not a c&p error
+    .GetDeviceState     = my_GetDeviceState,
+};
+
+static const IDirectInputDevice8W dev = { (void *) &dev_vtbl };
+
+HRESULT WINAPI DirectInput8Create(
+         HINSTANCE hinst,
+         DWORD dwVersion,
+         REFIID riidltf,
+         LPVOID *ppvOut,
+         LPUNKNOWN punkOuter)
+{
+    dprintf("%s\n", __func__);
+    *ppvOut = (void *) &api;
+
+    return S_OK;
+}
+
+static unsigned long WINAPI my_AddRef(IUnknown *self)
+{
+    return 1;
+}
+
+static unsigned long WINAPI my_Release(IUnknown *self)
+{
+    return 1;
+}
+
+static HRESULT WINAPI my_CreateDevice(
+        IDirectInput8W *self,
+        REFGUID rguid,
+        LPDIRECTINPUTDEVICE8W *lplpDirectInputDevice,
+        LPUNKNOWN pUnkOuter)
+{
+    dprintf("%s\n", __func__);
+    *lplpDirectInputDevice = (void *) &dev;
+
+    return S_OK;
+}
+
+static HRESULT WINAPI my_EnumDevices(
+        IDirectInput8W *self,
+        DWORD dwDevType,
+        LPDIENUMDEVICESCALLBACKW lpCallback,
+        LPVOID pvRef,
+        DWORD dwFlags)
+{
+    dprintf("%s\n", __func__);
+
+    return S_OK;
+}
+
+static HRESULT WINAPI my_SetDataFormat(
+        IDirectInputDevice8W *self,
+        LPCDIDATAFORMAT lpdf)
+{
+    dprintf("%s\n", __func__);
+
+    return S_OK;
+}
+
+static HRESULT WINAPI my_SetCooperativeLevel(
+        IDirectInputDevice8W *self,
+        HWND hwnd,
+        DWORD flags)
+{
+    dprintf("%s\n", __func__);
+
+    return S_OK;
+}
+
+static HRESULT WINAPI my_Acquire(IDirectInputDevice8W *self)
+{
+    return S_OK;
+}
+
+static HRESULT WINAPI my_GetDeviceState(
+        IDirectInputDevice8W *self,
+        DWORD cbData,
+        LPVOID lpvData)
+{
+    memset(lpvData, 0, cbData);
+
+    return S_OK;
+}
diff --git a/zinput/meson.build b/zinput/meson.build
new file mode 100644
index 0000000..24de1c7
--- /dev/null
+++ b/zinput/meson.build
@@ -0,0 +1,17 @@
+shared_library(
+    'zinput',
+    name_prefix : '',
+    include_directories : inc,
+    implicit_include_directories : false,
+    vs_module_defs : 'zinput.def',
+    c_pch : '../precompiled.h',
+    dependencies : [
+        capnhook.get_variable('hook_dep'),
+    ],
+    link_with : [
+        util_lib,
+    ],
+    sources : [
+        'dllmain.c',
+    ],
+)
diff --git a/zinput/zinput.def b/zinput/zinput.def
new file mode 100644
index 0000000..09c60cb
--- /dev/null
+++ b/zinput/zinput.def
@@ -0,0 +1,4 @@
+LIBRARY zinput
+
+EXPORTS
+    DirectInput8Create