From 2a5e594909b30dbb32419d914b8a3d3fd6f20fb4 Mon Sep 17 00:00:00 2001
From: pagefault <>
Date: Sun, 17 Jun 2001 23:53:57 +0000
Subject: [PATCH] DirectX library loading now done dynamically

---
 zsnes/src/win/winlink.cpp | 18 ++++++--
 zsnes/src/win/zloaderw.c  | 89 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 104 insertions(+), 3 deletions(-)

diff --git a/zsnes/src/win/winlink.cpp b/zsnes/src/win/winlink.cpp
index 09a595da..9b542722 100644
--- a/zsnes/src/win/winlink.cpp
+++ b/zsnes/src/win/winlink.cpp
@@ -127,6 +127,18 @@ extern "C" {
 DWORD                   MouseButton;
 }
 
+extern "C" {
+extern HMODULE hM_dinput8, hM_ddraw, hM_dsound;
+
+typedef HRESULT (WINAPI* lpDirectInput8Create)(HINSTANCE hinst, DWORD dwVersion, REFIID riidltf, LPVOID *ppvOut, LPUNKNOWN punkOuter);
+extern lpDirectInput8Create pDirectInput8Create;
+
+typedef HRESULT (WINAPI* lpDirectDrawCreateEx)(GUID FAR * lpGuid, LPVOID  *lplpDD, REFIID  iid,IUnknown FAR *pUnkOuter);
+extern lpDirectDrawCreateEx pDirectDrawCreateEx;
+
+typedef HRESULT (WINAPI* lpDirectSoundCreate8)(LPCGUID pcGuidDevice, LPDIRECTSOUND8 *ppDS8, LPUNKNOWN pUnkOuter);
+extern lpDirectSoundCreate8 pDirectSoundCreate8;
+}
 
 #define UPDATE_TICKS_GAME 1000.855001760297741789468390082/60      // milliseconds per world update
 #define UPDATE_TICKS_GAMEPAL 1000/50   // milliseconds per world update
@@ -506,7 +518,7 @@ InitSound()
    PrevSoundQuality=SoundQuality;
    PrevStereoSound=StereoSound;
 
-      if (DS_OK == DirectSoundCreate8(NULL, &lpDirectSound,NULL))
+      if (DS_OK == pDirectSoundCreate8(NULL, &lpDirectSound,NULL))
       {
           if (ExclusiveSound == 0)
           {
@@ -937,7 +949,7 @@ bool InitInput()
    char message1[256];
    HRESULT hr;
 
-   if (FAILED(hr=DirectInput8Create(hInst,DIRECTINPUT_VERSION,IID_IDirectInput8A,(void **) &DInput,NULL)))
+   if (FAILED(hr=pDirectInput8Create(hInst,DIRECTINPUT_VERSION,IID_IDirectInput8A,(void **) &DInput,NULL)))
    {
       sprintf(message1,"Error initializing DirectInput\nYou may need to install DirectX 8.0a or higher located at www.microsoft.com/directx \0");
       MessageBox (NULL, message1, "DirectInput Error" , MB_ICONERROR );
@@ -1122,7 +1134,7 @@ int InitDirectDraw()
    ClientToScreen(hMainWindow, ( LPPOINT )&rcWindow);
    ClientToScreen(hMainWindow, ( LPPOINT )&rcWindow + 1);
 
-   if (DirectDrawCreateEx(NULL, (void **)&lpDD, IID_IDirectDraw7, NULL) != DD_OK)
+   if (pDirectDrawCreateEx(NULL, (void **)&lpDD, IID_IDirectDraw7, NULL) != DD_OK)
    {
       MessageBox(NULL, "DirectDrawCreateEx failed.", "DirectDraw Error", MB_ICONERROR);
    }
diff --git a/zsnes/src/win/zloaderw.c b/zsnes/src/win/zloaderw.c
index 3217ed11..9abd1df4 100644
--- a/zsnes/src/win/zloaderw.c
+++ b/zsnes/src/win/zloaderw.c
@@ -22,6 +22,30 @@
 #include <direct.h>
 #include <winuser.h>
 
+
+#include <dinput.h>
+#include <dsound.h>
+
+static char dinput8_dll[] = {"dinput8.dll\0"};
+static char dinput8_imp[] = {"DirectInput8Create\0"};
+
+static char ddraw_dll[] = {"ddraw.dll\0"};
+static char ddraw_imp[] = {"DirectDrawCreateEx\0"};
+
+static char dsound_dll[] = {"dsound.dll\0"};
+static char dsound_imp[] = {"DirectSoundCreate8\0"};
+
+HMODULE hM_ddraw = NULL, hM_dsound = NULL,hM_dinput8 = NULL;
+
+typedef HRESULT (WINAPI* lpDirectInput8Create)(HINSTANCE hinst, DWORD dwVersion, REFIID riidltf, LPVOID *ppvOut, LPUNKNOWN punkOuter);
+lpDirectInput8Create pDirectInput8Create;
+
+typedef HRESULT (WINAPI* lpDirectDrawCreateEx)( GUID FAR * lpGuid, LPVOID  *lplpDD, REFIID  iid,IUnknown FAR *pUnkOuter );
+lpDirectDrawCreateEx pDirectDrawCreateEx;
+
+typedef HRESULT (WINAPI* lpDirectSoundCreate8)(LPCGUID pcGuidDevice, LPDIRECTSOUND8 *ppDS8, LPUNKNOWN pUnkOuter);
+lpDirectSoundCreate8 pDirectSoundCreate8;
+
 extern void zstart(void);
 extern void DosExit(void);
 extern void ConvertJoyMap1(void);
@@ -81,6 +105,71 @@ WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdSh
 
    hInst=hInstance;
 
+   hM_dinput8 = LoadLibrary(dinput8_dll);
+
+   if (hM_dinput8 == NULL)
+   {
+      if (MessageBox(NULL, "Sorry, you need DirectX v8.0 or higher to use\nZSNESW. Would you like to go to the DirectX homepage?", "Error", MB_ICONINFORMATION | MB_YESNO) == IDYES)
+         ShellExecute(NULL, NULL, "http://www.microsoft.com/directx/", NULL, NULL, 0);
+      goto startup_error_exit;
+   }
+
+   pDirectInput8Create = (lpDirectInput8Create) GetProcAddress(hM_dinput8, dinput8_imp);
+
+   if (pDirectInput8Create == NULL)
+   {
+      char err[256];
+      wsprintf(err,"Failed to import %s:%s", dinput8_dll, dinput8_imp);
+      MessageBox(NULL, err, "Error", MB_ICONERROR);
+      goto startup_dinput8_error;
+   }
+
+   hM_ddraw = LoadLibrary(ddraw_dll);
+
+   if (hM_ddraw == NULL)
+   {
+      char err[256];
+      wsprintf(err,"Failed to import %s",ddraw_dll);
+      MessageBox(NULL, err,"Error",MB_ICONERROR);
+      goto startup_dinput8_error;
+   }
+
+   pDirectDrawCreateEx = (lpDirectDrawCreateEx) GetProcAddress(hM_ddraw, ddraw_imp);
+
+   if (pDirectDrawCreateEx == NULL)
+   {
+      char err[256];
+      wsprintf(err,"Failed to import %s:%s", ddraw_dll, ddraw_imp);
+      MessageBox(NULL, err, "Error", MB_ICONERROR);
+      goto startup_ddraw_error;
+   }
+
+   hM_dsound = LoadLibrary(dsound_dll);
+
+   if (hM_dsound == NULL)
+   {
+      char err[256];
+      wsprintf(err,"Failed to import %s",dsound_dll);
+      MessageBox(NULL, err,"Error",MB_ICONERROR);
+      goto startup_ddraw_error;
+   }
+
+   pDirectSoundCreate8 = (lpDirectSoundCreate8) GetProcAddress(hM_dsound, dsound_imp);
+
+   if (pDirectSoundCreate8 == NULL)
+   {
+      char err[256];
+      wsprintf(err,"Failed to import %s:%s", dsound_dll, dsound_imp);
+      MessageBox(NULL, err, "Error", MB_ICONERROR);
+      FreeLibrary(hM_dsound);
+startup_ddraw_error:
+      FreeLibrary(hM_ddraw);
+startup_dinput8_error:
+      FreeLibrary(hM_dinput8);
+startup_error_exit:
+      exit(0);
+   }
+
    // Commandline: /ABCDE <nickname> <fname> <IP Addy>
    //   nickname = user nickname
    //   fname = filename w/ full path (if L) or path name (if C)