1 files changed, 375 insertions, 0 deletions

diff --git a/SDL-3.2.8/src/core/windows/SDL_windows.c b/SDL-3.2.8/src/core/windows/SDL_windows.c
new file mode 100644
index 0000000..286e8e6
--- /dev/null
+++ b/SDL-3.2.8/src/core/windows/SDL_windows.c
@@ -0,0 +1,375 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#if defined(SDL_PLATFORM_WINDOWS)
+
+#include "SDL_windows.h"
+
+#include <objbase.h> // for CoInitialize/CoUninitialize (Win32 only)
+#ifdef HAVE_ROAPI_H
+#include <roapi.h> // For RoInitialize/RoUninitialize (Win32 only)
+#else
+typedef enum RO_INIT_TYPE
+{
+    RO_INIT_SINGLETHREADED = 0,
+    RO_INIT_MULTITHREADED = 1
+} RO_INIT_TYPE;
+#endif
+
+#ifndef _WIN32_WINNT_VISTA
+#define _WIN32_WINNT_VISTA 0x0600
+#endif
+#ifndef _WIN32_WINNT_WIN7
+#define _WIN32_WINNT_WIN7 0x0601
+#endif
+#ifndef _WIN32_WINNT_WIN8
+#define _WIN32_WINNT_WIN8 0x0602
+#endif
+
+#ifndef LOAD_LIBRARY_SEARCH_SYSTEM32
+#define LOAD_LIBRARY_SEARCH_SYSTEM32 0x00000800
+#endif
+
+#ifndef WC_ERR_INVALID_CHARS
+#define WC_ERR_INVALID_CHARS 0x00000080
+#endif
+
+// Sets an error message based on an HRESULT
+bool WIN_SetErrorFromHRESULT(const char *prefix, HRESULT hr)
+{
+    TCHAR buffer[1024];
+    char *message;
+    TCHAR *p = buffer;
+    DWORD c = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, hr, 0,
+                            buffer, SDL_arraysize(buffer), NULL);
+    buffer[c] = 0;
+    // kill CR/LF that FormatMessage() sticks at the end
+    while (*p) {
+        if (*p == '\r') {
+            *p = 0;
+            break;
+        }
+        ++p;
+    }
+    message = WIN_StringToUTF8(buffer);
+    SDL_SetError("%s%s%s", prefix ? prefix : "", prefix ? ": " : "", message);
+    SDL_free(message);
+    return false;
+}
+
+// Sets an error message based on GetLastError()
+bool WIN_SetError(const char *prefix)
+{
+    return WIN_SetErrorFromHRESULT(prefix, GetLastError());
+}
+
+HRESULT
+WIN_CoInitialize(void)
+{
+    /* SDL handles any threading model, so initialize with the default, which
+       is compatible with OLE and if that doesn't work, try multi-threaded mode.
+
+       If you need multi-threaded mode, call CoInitializeEx() before SDL_Init()
+    */
+#if defined(SDL_PLATFORM_XBOXONE) || defined(SDL_PLATFORM_XBOXSERIES)
+    // On Xbox, there's no need to call CoInitializeEx (and it's not implemented)
+    return S_OK;
+#else
+    HRESULT hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
+    if (hr == RPC_E_CHANGED_MODE) {
+        hr = CoInitializeEx(NULL, COINIT_MULTITHREADED);
+    }
+
+    // S_FALSE means success, but someone else already initialized.
+    // You still need to call CoUninitialize in this case!
+    if (hr == S_FALSE) {
+        return S_OK;
+    }
+
+    return hr;
+#endif
+}
+
+void WIN_CoUninitialize(void)
+{
+    CoUninitialize();
+}
+
+FARPROC WIN_LoadComBaseFunction(const char *name)
+{
+    static bool s_bLoaded;
+    static HMODULE s_hComBase;
+
+    if (!s_bLoaded) {
+        s_hComBase = LoadLibraryEx(TEXT("combase.dll"), NULL, LOAD_LIBRARY_SEARCH_SYSTEM32);
+        s_bLoaded = true;
+    }
+    if (s_hComBase) {
+        return GetProcAddress(s_hComBase, name);
+    } else {
+        return NULL;
+    }
+}
+
+HRESULT
+WIN_RoInitialize(void)
+{
+    typedef HRESULT(WINAPI * RoInitialize_t)(RO_INIT_TYPE initType);
+    RoInitialize_t RoInitializeFunc = (RoInitialize_t)WIN_LoadComBaseFunction("RoInitialize");
+    if (RoInitializeFunc) {
+        // RO_INIT_SINGLETHREADED is equivalent to COINIT_APARTMENTTHREADED
+        HRESULT hr = RoInitializeFunc(RO_INIT_SINGLETHREADED);
+        if (hr == RPC_E_CHANGED_MODE) {
+            hr = RoInitializeFunc(RO_INIT_MULTITHREADED);
+        }
+
+        // S_FALSE means success, but someone else already initialized.
+        // You still need to call RoUninitialize in this case!
+        if (hr == S_FALSE) {
+            return S_OK;
+        }
+
+        return hr;
+    } else {
+        return E_NOINTERFACE;
+    }
+}
+
+void WIN_RoUninitialize(void)
+{
+    typedef void(WINAPI * RoUninitialize_t)(void);
+    RoUninitialize_t RoUninitializeFunc = (RoUninitialize_t)WIN_LoadComBaseFunction("RoUninitialize");
+    if (RoUninitializeFunc) {
+        RoUninitializeFunc();
+    }
+}
+
+#if !defined(SDL_PLATFORM_XBOXONE) && !defined(SDL_PLATFORM_XBOXSERIES)
+static BOOL IsWindowsVersionOrGreater(WORD wMajorVersion, WORD wMinorVersion, WORD wServicePackMajor)
+{
+    OSVERSIONINFOEXW osvi;
+    DWORDLONG const dwlConditionMask = VerSetConditionMask(
+        VerSetConditionMask(
+            VerSetConditionMask(
+                0, VER_MAJORVERSION, VER_GREATER_EQUAL),
+            VER_MINORVERSION, VER_GREATER_EQUAL),
+        VER_SERVICEPACKMAJOR, VER_GREATER_EQUAL);
+
+    SDL_zero(osvi);
+    osvi.dwOSVersionInfoSize = sizeof(osvi);
+    osvi.dwMajorVersion = wMajorVersion;
+    osvi.dwMinorVersion = wMinorVersion;
+    osvi.wServicePackMajor = wServicePackMajor;
+
+    return VerifyVersionInfoW(&osvi, VER_MAJORVERSION | VER_MINORVERSION | VER_SERVICEPACKMAJOR, dwlConditionMask) != FALSE;
+}
+#endif
+
+// apply some static variables so we only call into the Win32 API once per process for each check.
+#if defined(SDL_PLATFORM_XBOXONE) || defined(SDL_PLATFORM_XBOXSERIES)
+    #define CHECKWINVER(notdesktop_platform_result, test) return (notdesktop_platform_result);
+#else
+    #define CHECKWINVER(notdesktop_platform_result, test) \
+        static bool checked = false; \
+        static BOOL result = FALSE; \
+        if (!checked) { \
+            result = (test); \
+            checked = true; \
+        } \
+        return result;
+#endif
+
+// this is the oldest thing we run on (and we may lose support for this in SDL3 at any time!),
+//  so there's no "OrGreater" as that would always be TRUE. The other functions are here to
+//  ask "can we support a specific feature?" but this function is here to ask "do we need to do
+//  something different for an OS version we probably should abandon?"  :)
+BOOL WIN_IsWindowsXP(void)
+{
+    CHECKWINVER(FALSE, !WIN_IsWindowsVistaOrGreater() && IsWindowsVersionOrGreater(HIBYTE(_WIN32_WINNT_WINXP), LOBYTE(_WIN32_WINNT_WINXP), 0));
+}
+
+BOOL WIN_IsWindowsVistaOrGreater(void)
+{
+    CHECKWINVER(TRUE, IsWindowsVersionOrGreater(HIBYTE(_WIN32_WINNT_VISTA), LOBYTE(_WIN32_WINNT_VISTA), 0));
+}
+
+BOOL WIN_IsWindows7OrGreater(void)
+{
+    CHECKWINVER(TRUE, IsWindowsVersionOrGreater(HIBYTE(_WIN32_WINNT_WIN7), LOBYTE(_WIN32_WINNT_WIN7), 0));
+}
+
+BOOL WIN_IsWindows8OrGreater(void)
+{
+    CHECKWINVER(TRUE, IsWindowsVersionOrGreater(HIBYTE(_WIN32_WINNT_WIN8), LOBYTE(_WIN32_WINNT_WIN8), 0));
+}
+
+#undef CHECKWINVER
+
+
+/*
+WAVExxxCAPS gives you 31 bytes for the device name, and just truncates if it's
+longer. However, since WinXP, you can use the WAVExxxCAPS2 structure, which
+will give you a name GUID. The full name is in the Windows Registry under
+that GUID, located here: HKLM\System\CurrentControlSet\Control\MediaCategories
+
+Note that drivers can report GUID_NULL for the name GUID, in which case,
+Windows makes a best effort to fill in those 31 bytes in the usual place.
+This info summarized from MSDN:
+
+http://web.archive.org/web/20131027093034/http://msdn.microsoft.com/en-us/library/windows/hardware/ff536382(v=vs.85).aspx
+
+Always look this up in the registry if possible, because the strings are
+different! At least on Win10, I see "Yeti Stereo Microphone" in the
+Registry, and a unhelpful "Microphone(Yeti Stereo Microph" in winmm. Sigh.
+
+(Also, DirectSound shouldn't be limited to 32 chars, but its device enum
+has the same problem.)
+
+WASAPI doesn't need this. This is just for DirectSound/WinMM.
+*/
+char *WIN_LookupAudioDeviceName(const WCHAR *name, const GUID *guid)
+{
+#if defined(SDL_PLATFORM_XBOXONE) || defined(SDL_PLATFORM_XBOXSERIES)
+    return WIN_StringToUTF8W(name); // No registry access on Xbox, go with what we've got.
+#else
+    static const GUID nullguid = { 0 };
+    const unsigned char *ptr;
+    char keystr[128];
+    WCHAR *strw = NULL;
+    bool rc;
+    HKEY hkey;
+    DWORD len = 0;
+    char *result = NULL;
+
+    if (WIN_IsEqualGUID(guid, &nullguid)) {
+        return WIN_StringToUTF8(name); // No GUID, go with what we've got.
+    }
+
+    ptr = (const unsigned char *)guid;
+    (void)SDL_snprintf(keystr, sizeof(keystr),
+                       "System\\CurrentControlSet\\Control\\MediaCategories\\{%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X}",
+                       ptr[3], ptr[2], ptr[1], ptr[0], ptr[5], ptr[4], ptr[7], ptr[6],
+                       ptr[8], ptr[9], ptr[10], ptr[11], ptr[12], ptr[13], ptr[14], ptr[15]);
+
+    strw = WIN_UTF8ToString(keystr);
+    rc = (RegOpenKeyExW(HKEY_LOCAL_MACHINE, strw, 0, KEY_QUERY_VALUE, &hkey) == ERROR_SUCCESS);
+    SDL_free(strw);
+    if (!rc) {
+        return WIN_StringToUTF8(name); // oh well.
+    }
+
+    rc = (RegQueryValueExW(hkey, L"Name", NULL, NULL, NULL, &len) == ERROR_SUCCESS);
+    if (!rc) {
+        RegCloseKey(hkey);
+        return WIN_StringToUTF8(name); // oh well.
+    }
+
+    strw = (WCHAR *)SDL_malloc(len + sizeof(WCHAR));
+    if (!strw) {
+        RegCloseKey(hkey);
+        return WIN_StringToUTF8(name); // oh well.
+    }
+
+    rc = (RegQueryValueExW(hkey, L"Name", NULL, NULL, (LPBYTE)strw, &len) == ERROR_SUCCESS);
+    RegCloseKey(hkey);
+    if (!rc) {
+        SDL_free(strw);
+        return WIN_StringToUTF8(name); // oh well.
+    }
+
+    strw[len / 2] = 0; // make sure it's null-terminated.
+
+    result = WIN_StringToUTF8(strw);
+    SDL_free(strw);
+    return result ? result : WIN_StringToUTF8(name);
+#endif
+}
+
+BOOL WIN_IsEqualGUID(const GUID *a, const GUID *b)
+{
+    return (SDL_memcmp(a, b, sizeof(*a)) == 0);
+}
+
+BOOL WIN_IsEqualIID(REFIID a, REFIID b)
+{
+    return (SDL_memcmp(a, b, sizeof(*a)) == 0);
+}
+
+void WIN_RECTToRect(const RECT *winrect, SDL_Rect *sdlrect)
+{
+    sdlrect->x = winrect->left;
+    sdlrect->w = (winrect->right - winrect->left) + 1;
+    sdlrect->y = winrect->top;
+    sdlrect->h = (winrect->bottom - winrect->top) + 1;
+}
+
+void WIN_RectToRECT(const SDL_Rect *sdlrect, RECT *winrect)
+{
+    winrect->left = sdlrect->x;
+    winrect->right = sdlrect->x + sdlrect->w - 1;
+    winrect->top = sdlrect->y;
+    winrect->bottom = sdlrect->y + sdlrect->h - 1;
+}
+
+BOOL WIN_IsRectEmpty(const RECT *rect)
+{
+    // Calculating this manually because Xbox does not support Win32 IsRectEmpty.
+    return (rect->right <= rect->left) || (rect->bottom <= rect->top);
+}
+
+// Some GUIDs we need to know without linking to libraries that aren't available before Vista.
+/* *INDENT-OFF* */ // clang-format off
+static const GUID SDL_KSDATAFORMAT_SUBTYPE_PCM = { 0x00000001, 0x0000, 0x0010,{ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 } };
+static const GUID SDL_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT = { 0x00000003, 0x0000, 0x0010,{ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 } };
+/* *INDENT-ON* */ // clang-format on
+
+SDL_AudioFormat SDL_WaveFormatExToSDLFormat(WAVEFORMATEX *waveformat)
+{
+    if ((waveformat->wFormatTag == WAVE_FORMAT_IEEE_FLOAT) && (waveformat->wBitsPerSample == 32)) {
+        return SDL_AUDIO_F32;
+    } else if ((waveformat->wFormatTag == WAVE_FORMAT_PCM) && (waveformat->wBitsPerSample == 16)) {
+        return SDL_AUDIO_S16;
+    } else if ((waveformat->wFormatTag == WAVE_FORMAT_PCM) && (waveformat->wBitsPerSample == 32)) {
+        return SDL_AUDIO_S32;
+    } else if (waveformat->wFormatTag == WAVE_FORMAT_EXTENSIBLE) {
+        const WAVEFORMATEXTENSIBLE *ext = (const WAVEFORMATEXTENSIBLE *)waveformat;
+        if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, sizeof(GUID)) == 0) && (waveformat->wBitsPerSample == 32)) {
+            return SDL_AUDIO_F32;
+        } else if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_PCM, sizeof(GUID)) == 0) && (waveformat->wBitsPerSample == 16)) {
+            return SDL_AUDIO_S16;
+        } else if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_PCM, sizeof(GUID)) == 0) && (waveformat->wBitsPerSample == 32)) {
+            return SDL_AUDIO_S32;
+        }
+    }
+    return SDL_AUDIO_UNKNOWN;
+}
+
+
+int WIN_WideCharToMultiByte(UINT CodePage, DWORD dwFlags, LPCWCH lpWideCharStr, int cchWideChar, LPSTR lpMultiByteStr, int cbMultiByte, LPCCH lpDefaultChar, LPBOOL lpUsedDefaultChar)
+{
+    if (WIN_IsWindowsXP()) {
+        dwFlags &= ~WC_ERR_INVALID_CHARS;  // not supported before Vista. Without this flag, it will just replace bogus chars with U+FFFD. You're on your own, WinXP.
+    }
+    return WideCharToMultiByte(CodePage, dwFlags, lpWideCharStr, cchWideChar, lpMultiByteStr, cbMultiByte, lpDefaultChar, lpUsedDefaultChar);
+}
+
+#endif // defined(SDL_PLATFORM_WINDOWS)