d3d9ex: add cursor confining (ported from sdvxhook1)

dist/sdvx5/sdvxhook2.conf

@@ -16,6 +16,9 @@ gfx.framed=true
 # Run the game windowed
 gfx.windowed=false
 
+# Confine mouse coursor to window
+gfx.confined=false
+
 # Windowed width, -1 for default size
 gfx.window_width=1080
 

src/main/d3d9exhook/config-gfx.c

@@ -10,6 +10,7 @@
 
 #define D3D9EXHOOK_CONFIG_GFX_FRAMED_KEY "gfx.framed"
 #define D3D9EXHOOK_CONFIG_GFX_WINDOWED_KEY "gfx.windowed"
+#define D3D9EXHOOK_CONFIG_GFX_CONFINED_KEY "gfx.confined"
 #define D3D9EXHOOK_CONFIG_GFX_WINDOW_WIDTH_KEY "gfx.window_width"
 #define D3D9EXHOOK_CONFIG_GFX_WINDOW_HEIGHT_KEY "gfx.window_height"
 #define D3D9EXHOOK_CONFIG_GFX_FORCED_REFRESHRATE_KEY "gfx.forced_refresh_rate"
@@ -18,6 +19,7 @@
 
 #define D3D9EXHOOK_CONFIG_GFX_DEFAULT_FRAMED_VALUE false
 #define D3D9EXHOOK_CONFIG_GFX_DEFAULT_WINDOWED_VALUE false
+#define D3D9EXHOOK_CONFIG_GFX_DEFAULT_CONFINED_VALUE false
 #define D3D9EXHOOK_CONFIG_GFX_DEFAULT_WINDOW_WIDTH_VALUE -1
 #define D3D9EXHOOK_CONFIG_GFX_DEFAULT_WINDOW_HEIGHT_VALUE -1
 #define D3D9EXHOOK_CONFIG_GFX_DEFAULT_FORCED_RR_VALUE -1
@@ -38,6 +40,12 @@ void d3d9exhook_config_gfx_init(struct cconfig *config)
         D3D9EXHOOK_CONFIG_GFX_DEFAULT_WINDOWED_VALUE,
         "Run the game windowed");
 
+    cconfig_util_set_bool(
+        config,
+        D3D9EXHOOK_CONFIG_GFX_CONFINED_KEY,
+        D3D9EXHOOK_CONFIG_GFX_DEFAULT_CONFINED_VALUE,
+        "Confine mouse coursor to window");
+
     cconfig_util_set_int(
         config,
         D3D9EXHOOK_CONFIG_GFX_WINDOW_WIDTH_KEY,
@@ -99,6 +107,18 @@ void d3d9exhook_config_gfx_get(
             D3D9EXHOOK_CONFIG_GFX_DEFAULT_WINDOWED_VALUE);
     }
 
+    if (!cconfig_util_get_bool(
+            config,
+            D3D9EXHOOK_CONFIG_GFX_CONFINED_KEY,
+            &config_gfx->confined,
+            D3D9EXHOOK_CONFIG_GFX_DEFAULT_CONFINED_VALUE)) {
+        log_warning(
+            "Invalid value for key '%s' specified, fallback "
+            "to default '%d'",
+            D3D9EXHOOK_CONFIG_GFX_CONFINED_KEY,
+            D3D9EXHOOK_CONFIG_GFX_DEFAULT_CONFINED_VALUE);
+    }
+
     if (!cconfig_util_get_int(
             config,
             D3D9EXHOOK_CONFIG_GFX_WINDOW_WIDTH_KEY,

src/main/d3d9exhook/config-gfx.h

@@ -12,6 +12,7 @@
 struct d3d9exhook_config_gfx {
     bool framed;
     bool windowed;
+    bool confined;
     int32_t window_width;
     int32_t window_height;
     int32_t forced_refresh_rate;

src/main/d3d9exhook/d3d9ex.c

@@ -47,6 +47,8 @@ static HRESULT STDCALL my_CreateDeviceEx(
 
 static HRESULT STDCALL my_Direct3DCreate9Ex(UINT sdk_ver, IDirect3D9Ex **api);
 
+static WNDPROC real_WndProc;
+
 static BOOL STDCALL my_EnumDisplayDevicesA(
     const char *dev_name, DWORD dev_num, DISPLAY_DEVICEA *info, DWORD flags);
 
@@ -82,6 +84,7 @@ static BOOL(STDCALL *real_MoveWindow)(
 /* ------------------------------------------------------------------------- */
 
 static bool d3d9ex_windowed;
+static bool d3d9ex_confined;
 static int32_t d3d9ex_force_refresh_rate = -1;
 static int32_t d3d9ex_window_width = -1;
 static int32_t d3d9ex_window_height = -1;
@@ -183,6 +186,52 @@ my_MoveWindow(HWND hWnd, int X, int Y, int nWidth, int nHeight, BOOL bRepaint)
     return result;
 }
 
+static LRESULT gfx_confine(HWND hwnd)
+{
+    POINT p;
+    RECT r;
+
+    log_misc("Confining mouse (ALT-TAB to release)");
+
+    p.x = 0;
+    p.y = 0;
+
+    ClientToScreen(hwnd, &p);
+
+    r.left = p.x;
+    r.top = p.y;
+    r.right = p.x + 100;
+    r.bottom = p.y + 100;
+
+    ClipCursor(&r);
+
+    return TRUE;
+}
+
+static LRESULT gfx_unconfine(HWND hwnd)
+{
+    log_misc("Un-confining mouse");
+
+    ClipCursor(NULL);
+
+    return TRUE;
+}
+
+static LRESULT CALLBACK
+my_WndProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
+{
+    switch (msg) {
+        case WM_SETFOCUS:
+            return gfx_confine(hwnd);
+
+        case WM_KILLFOCUS:
+            return gfx_unconfine(hwnd);
+
+        default:
+            return CallWindowProc(real_WndProc, hwnd, msg, wparam, lparam);
+    }
+}
+
 static HRESULT STDCALL my_CreateDeviceEx(
     IDirect3D9Ex *self,
     UINT adapter,
@@ -268,6 +317,12 @@ static HRESULT STDCALL my_CreateDeviceEx(
     hr = IDirect3D9Ex_CreateDeviceEx(
         real, adapter, type, hwnd, flags, pp, fdm, pdev);
 
+    if (SUCCEEDED(hr) && d3d9ex_confined) {
+        real_WndProc = (void *) GetWindowLongPtr(hwnd, GWLP_WNDPROC);
+
+        SetWindowLongPtr(hwnd, GWLP_WNDPROC, (uintptr_t) my_WndProc);
+    }
+
     return hr;
 }
 
@@ -319,6 +374,7 @@ void d3d9ex_hook_init(void)
 void d3d9ex_configure(struct d3d9exhook_config_gfx *gfx_config)
 {
     d3d9ex_windowed = gfx_config->windowed;
+    d3d9ex_confined = gfx_config->confined;
     d3d9ex_window_framed = gfx_config->framed;
     d3d9ex_window_width = gfx_config->window_width;
     d3d9ex_window_height = gfx_config->window_height;