From: Gijs Vermeulen <gijsvrm@gmail.com>
Subject: [PATCH v2] avicap32: Partially implement capCreateCaptureWindowW.
Message-Id: <20210831181745.186552-1-gijsvrm@gmail.com>
Date: Tue, 31 Aug 2021 20:17:45 +0200

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=38011
Signed-off-by: Gijs Vermeulen <gijsvrm@gmail.com>
---
 dlls/avicap32/Makefile.in     |  1 +
 dlls/avicap32/avicap32_main.c | 91 ++++++++++++++++++++++++++++-------
 2 files changed, 75 insertions(+), 17 deletions(-)

diff --git a/dlls/avicap32/Makefile.in b/dlls/avicap32/Makefile.in
index 8f5a1089d5c..f320a58f04b 100644
--- a/dlls/avicap32/Makefile.in
+++ b/dlls/avicap32/Makefile.in
@@ -1,4 +1,5 @@
 MODULE    = avicap32.dll
 IMPORTLIB = avicap32
+IMPORTS   = user32
 
 C_SRCS = avicap32_main.c
diff --git a/dlls/avicap32/avicap32_main.c b/dlls/avicap32/avicap32_main.c
index 9e2a99d4c7c..3a421f330f4 100644
--- a/dlls/avicap32/avicap32_main.c
+++ b/dlls/avicap32/avicap32_main.c
@@ -56,36 +56,75 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(avicap);
 
+static WCHAR class_nameW[] = {'W','i','n','e','A','v','i','C','a','p','C','l','a','s','s',0};
+
+static LRESULT CALLBACK avicap_wndproc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
+{
+    switch(msg)
+    {
+        default:
+            if (msg >= WM_CAP_START && msg <= WM_CAP_END)
+                FIXME("Unhandled message %#x\n", msg);
+            return DefWindowProcW(hwnd, msg, wparam, lparam);
+    }
+}
+
+static void register_class(void)
+{
+    WNDCLASSEXW class;
+
+    class.cbSize = sizeof(WNDCLASSEXW);
+    class.style = 0;
+    class.lpfnWndProc = avicap_wndproc;
+    class.cbClsExtra = 0;
+    class.cbWndExtra = 0;
+    class.hInstance = GetModuleHandleW(NULL);
+    class.hIcon = NULL;
+    class.hCursor = LoadCursorW(NULL, (LPWSTR)IDC_ARROW);
+    class.hbrBackground = (HBRUSH)(COLOR_BTNFACE+1);
+    class.lpszMenuName = NULL;
+    class.lpszClassName = class_nameW;
+    class.hIconSm = NULL;
+
+    if (!RegisterClassExW(&class) && GetLastError() != ERROR_CLASS_ALREADY_EXISTS)
+        ERR("Failed to register class!\n");
+}
+
+static void unregister_class(HINSTANCE instance)
+{
+    if (!UnregisterClassW(class_nameW, instance) && GetLastError() != ERROR_CLASS_DOES_NOT_EXIST)
+        ERR("Failed to unregister class!\n");
+}
 
 /***********************************************************************
  *             capCreateCaptureWindowW   (AVICAP32.@)
  */
-HWND VFWAPI capCreateCaptureWindowW(LPCWSTR lpszWindowName, DWORD dwStyle, INT x,
-                                    INT y, INT nWidth, INT nHeight, HWND hWnd,
-                                    INT nID)
+HWND VFWAPI capCreateCaptureWindowW(const WCHAR *window_name, DWORD style, INT x,
+                                    INT y, INT width, INT height, HWND hWnd, INT id)
 {
-    FIXME("(%s, %08x, %08x, %08x, %08x, %08x, %p, %08x): stub\n",
-           debugstr_w(lpszWindowName), dwStyle, x, y, nWidth, nHeight, hWnd, nID);
-    return 0;
+    FIXME("(%s, %08x, %08x, %08x, %08x, %08x, %p, %08x): semi-stub\n",
+            debugstr_w(window_name), style, x, y, width, height, hWnd, id);
+
+    return CreateWindowExW(style, class_nameW, window_name, style, x, y, width, height,
+                            hWnd, NULL, GetModuleHandleW(NULL), NULL);
 }
 
 /***********************************************************************
  *             capCreateCaptureWindowA   (AVICAP32.@)
  */
-HWND VFWAPI capCreateCaptureWindowA(LPCSTR lpszWindowName, DWORD dwStyle, INT x,
-                                    INT y, INT nWidth, INT nHeight, HWND hWnd,
-                                    INT nID)
-{   UNICODE_STRING nameW;
-    HWND retW;
+HWND VFWAPI capCreateCaptureWindowA(const char *window_name, DWORD style, INT x,
+                                    INT y, INT width, INT height, HWND hWnd, INT id)
+{   UNICODE_STRING window_nameW;
+    HWND ret;
 
-    if (lpszWindowName) RtlCreateUnicodeStringFromAsciiz(&nameW, lpszWindowName);
-    else nameW.Buffer = NULL;
+    if (window_name) RtlCreateUnicodeStringFromAsciiz(&window_nameW, window_name);
+    else window_nameW.Buffer = NULL;
 
-    retW = capCreateCaptureWindowW(nameW.Buffer, dwStyle, x, y, nWidth, nHeight,
-                                   hWnd, nID);
-    RtlFreeUnicodeString(&nameW);
+    ret = capCreateCaptureWindowW(window_nameW.Buffer, style, x, y, width, height,
+                                   hWnd, id);
+    RtlFreeUnicodeString(&window_nameW);
 
-    return retW;
+    return ret;
 }
 
 #ifdef HAVE_LINUX_VIDEODEV2_H
@@ -195,3 +234,21 @@ BOOL VFWAPI capGetDriverDescriptionW(WORD wDriverIndex, LPWSTR lpszName,
    TRACE("Version: %s - Name: %s\n", debugstr_w(lpszVer), debugstr_w(lpszName));
    return TRUE;
 }
+
+BOOL WINAPI DllMain(HINSTANCE instance, DWORD reason, void *reserved)
+{
+    TRACE("(%p %d %p)\n", instance, reason, reserved);
+
+    switch(reason)
+    {
+    case DLL_PROCESS_ATTACH:
+        DisableThreadLibraryCalls(instance);
+        register_class();
+        break;
+    case DLL_PROCESS_DETACH:
+        if (reserved) break;
+        unregister_class(instance);
+    }
+
+    return TRUE;
+}

-- 
2.33.0