SDL_DXGIGetOutputInfo() checks input parameters and returns a boolean value whether or not it succeeded.

include/SDL_system.h

@@ -59,7 +59,7 @@ extern DECLSPEC IDirect3DDevice9* SDLCALL SDL_RenderGetD3D9Device(SDL_Renderer *
    These can be passed to EnumAdapters and EnumOutputs respectively to get the objects
    required to create a DX10 or DX11 device and swap chain.
  */
-extern DECLSPEC void SDLCALL SDL_DXGIGetOutputInfo( int displayIndex, int *adapterIndex, int *outputIndex );
+extern DECLSPEC SDL_bool SDLCALL SDL_DXGIGetOutputInfo( int displayIndex, int *adapterIndex, int *outputIndex );
 
 #endif /* __WIN32__ */
 

src/dynapi/SDL_dynapi_procs.h

@@ -604,5 +604,5 @@ SDL_DYNAPI_PROC(SDL_bool,SDL_HasAVX,(void),(),return)
 SDL_DYNAPI_PROC(SDL_AssertionHandler,SDL_GetDefaultAssertionHandler,(void),(),return)
 SDL_DYNAPI_PROC(SDL_AssertionHandler,SDL_GetAssertionHandler,(void **a),(a),return)
 #ifdef __WIN32__
-SDL_DYNAPI_PROC(void,SDL_DXGIGetOutputInfo,(int a,int *b, int *c),(a,b,c),)
+SDL_DYNAPI_PROC(SDL_bool,SDL_DXGIGetOutputInfo,(int a,int *b, int *c),(a,b,c),return)
 #endif

src/video/windows/SDL_windowsvideo.c

@@ -182,67 +182,67 @@ WIN_VideoQuit(_THIS)
 SDL_bool 
 D3D_LoadDLL( void **pD3DDLL, IDirect3D9 **pDirect3D9Interface )
 {
-	*pD3DDLL = SDL_LoadObject("D3D9.DLL");
-	if (*pD3DDLL) {
-		IDirect3D9 *(WINAPI * D3DCreate) (UINT SDKVersion);
-
-		D3DCreate =
-			(IDirect3D9 * (WINAPI *) (UINT)) SDL_LoadFunction(*pD3DDLL,
-			"Direct3DCreate9");
-		if (D3DCreate) {
-			*pDirect3D9Interface = D3DCreate(D3D_SDK_VERSION);
-		}
-		if (!*pDirect3D9Interface) {
-			SDL_UnloadObject(*pD3DDLL);
-			*pD3DDLL = NULL;
-			return SDL_FALSE;
-		}
-
-		return SDL_TRUE;
-	} else {
-		*pDirect3D9Interface = NULL;
-		return SDL_FALSE;
-	}
+    *pD3DDLL = SDL_LoadObject("D3D9.DLL");
+    if (*pD3DDLL) {
+        IDirect3D9 *(WINAPI * D3DCreate) (UINT SDKVersion);
+
+        D3DCreate =
+            (IDirect3D9 * (WINAPI *) (UINT)) SDL_LoadFunction(*pD3DDLL,
+            "Direct3DCreate9");
+        if (D3DCreate) {
+            *pDirect3D9Interface = D3DCreate(D3D_SDK_VERSION);
+        }
+        if (!*pDirect3D9Interface) {
+            SDL_UnloadObject(*pD3DDLL);
+            *pD3DDLL = NULL;
+            return SDL_FALSE;
+        }
+
+        return SDL_TRUE;
+    } else {
+        *pDirect3D9Interface = NULL;
+        return SDL_FALSE;
+    }
 }
 
 
 int
 SDL_Direct3D9GetAdapterIndex( int displayIndex )
 {
-	void *pD3DDLL;
-	IDirect3D9 *pD3D;
-	if (!D3D_LoadDLL(&pD3DDLL, &pD3D)) {
-		SDL_SetError("Unable to create Direct3D interface");
-		return D3DADAPTER_DEFAULT;
-	} else {
-		SDL_DisplayData *pData = (SDL_DisplayData *)SDL_GetDisplayDriverData(displayIndex);
-		int adapterIndex = D3DADAPTER_DEFAULT;
-
-		if (!pData) {
-			SDL_SetError("Invalid display index");
-			adapterIndex = -1; /* make sure we return something invalid */
-		} else {
-			char *displayName = WIN_StringToUTF8(pData->DeviceName);
-			unsigned int count = IDirect3D9_GetAdapterCount(pD3D);
-			unsigned int i;
-			for (i=0; i<count; i++) {
-				D3DADAPTER_IDENTIFIER9 id;
-				IDirect3D9_GetAdapterIdentifier(pD3D, i, 0, &id);
-
-				if (SDL_strcmp(id.DeviceName, displayName) == 0) {
-					adapterIndex = i;
-					break;
-				}
-			}
-			SDL_free(displayName);
-		}
-
-		/* free up the D3D stuff we inited */
-		IDirect3D9_Release(pD3D);
-		SDL_UnloadObject(pD3DDLL);
-
-		return adapterIndex;
-	}
+    void *pD3DDLL;
+    IDirect3D9 *pD3D;
+    if (!D3D_LoadDLL(&pD3DDLL, &pD3D)) {
+        SDL_SetError("Unable to create Direct3D interface");
+        return D3DADAPTER_DEFAULT;
+    } else {
+        SDL_DisplayData *pData = (SDL_DisplayData *)SDL_GetDisplayDriverData(displayIndex);
+        int adapterIndex = D3DADAPTER_DEFAULT;
+
+        if (!pData) {
+            SDL_SetError("Invalid display index");
+            adapterIndex = -1; /* make sure we return something invalid */
+        } else {
+            char *displayName = WIN_StringToUTF8(pData->DeviceName);
+            unsigned int count = IDirect3D9_GetAdapterCount(pD3D);
+            unsigned int i;
+            for (i=0; i<count; i++) {
+                D3DADAPTER_IDENTIFIER9 id;
+                IDirect3D9_GetAdapterIdentifier(pD3D, i, 0, &id);
+
+                if (SDL_strcmp(id.DeviceName, displayName) == 0) {
+                    adapterIndex = i;
+                    break;
+                }
+            }
+            SDL_free(displayName);
+        }
+
+        /* free up the D3D stuff we inited */
+        IDirect3D9_Release(pD3D);
+        SDL_UnloadObject(pD3DDLL);
+
+        return adapterIndex;
+    }
 }
 
 #define CINTERFACE
@@ -250,84 +250,98 @@ SDL_Direct3D9GetAdapterIndex( int displayIndex )
 #include <dxgi.h>
 
 SDL_bool 
-DXGI_LoadDLL( void **pDXGIDLL , IDXGIFactory **pDXGIFactory )
+DXGI_LoadDLL(void **pDXGIDLL, IDXGIFactory **pDXGIFactory)
 {
-	*pDXGIDLL = SDL_LoadObject("DXGI.DLL");
-	if (*pDXGIDLL ) {
-		HRESULT (WINAPI *CreateDXGI)( REFIID riid, void **ppFactory );
-
-		CreateDXGI =
-			(HRESULT (WINAPI *) (REFIID, void**)) SDL_LoadFunction(*pDXGIDLL,
-			"CreateDXGIFactory");
-		if (CreateDXGI) {
-			GUID dxgiGUID = {0x7b7166ec,0x21c7,0x44ae,{0xb2,0x1a,0xc9,0xae,0x32,0x1a,0xe3,0x69}};
-			if( !SUCCEEDED( CreateDXGI( &dxgiGUID, (void**)pDXGIFactory ))) {
-				*pDXGIFactory = NULL;
-			}
-		}
-		if (!*pDXGIFactory) {
-			SDL_UnloadObject(*pDXGIDLL);
-			*pDXGIDLL = NULL;
-			return SDL_FALSE;
-		}
-
-		return SDL_TRUE;
-	} else {
-		*pDXGIFactory = NULL;
-		return SDL_FALSE;
-	}
+    *pDXGIDLL = SDL_LoadObject("DXGI.DLL");
+    if (!*pDXGIDLL) {
+        HRESULT (WINAPI *CreateDXGI)( REFIID riid, void **ppFactory );
+
+        CreateDXGI =
+            (HRESULT (WINAPI *) (REFIID, void**)) SDL_LoadFunction(*pDXGIDLL,
+            "CreateDXGIFactory");
+        if (CreateDXGI) {
+            GUID dxgiGUID = {0x7b7166ec,0x21c7,0x44ae,{0xb2,0x1a,0xc9,0xae,0x32,0x1a,0xe3,0x69}};
+            if (!SUCCEEDED(CreateDXGI(&dxgiGUID, (void**)pDXGIFactory))) {
+                *pDXGIFactory = NULL;
+            }
+        }
+        if (!*pDXGIFactory) {
+            SDL_UnloadObject(*pDXGIDLL);
+            *pDXGIDLL = NULL;
+            return SDL_FALSE;
+        }
+
+        return SDL_TRUE;
+    } else {
+        *pDXGIFactory = NULL;
+        return SDL_FALSE;
+    }
 }
 
 
-void
-SDL_DXGIGetOutputInfo( int displayIndex, int *adapterIndex, int *outputIndex )
+SDL_bool
+SDL_DXGIGetOutputInfo(int displayIndex, int *adapterIndex, int *outputIndex)
 {
-	void *pDXGIDLL;
-	IDXGIFactory *pDXGIFactory;
-
-	*adapterIndex = -1;
-	*outputIndex = -1;
-
-	if (!DXGI_LoadDLL(&pDXGIDLL, &pDXGIFactory)) {
-		SDL_SetError("Unable to create DXGI interface");
-	} else {
-		SDL_DisplayData *pData = (SDL_DisplayData *)SDL_GetDisplayDriverData(displayIndex);
-
-		if (!pData) {
-			SDL_SetError("Invalid display index");
-		} else {
-			char *displayName = WIN_StringToUTF8(pData->DeviceName);
-			int nAdapter = 0, nOutput = 0;
-			IDXGIAdapter* pDXGIAdapter;
-			while ( *adapterIndex == -1 && IDXGIFactory_EnumAdapters(pDXGIFactory, nAdapter, &pDXGIAdapter) != DXGI_ERROR_NOT_FOUND ) {
-				IDXGIOutput* pDXGIOutput;
-				while ( *adapterIndex == -1 && IDXGIAdapter_EnumOutputs(pDXGIAdapter, nOutput, &pDXGIOutput) != DXGI_ERROR_NOT_FOUND ) {
-					DXGI_OUTPUT_DESC outputDesc;
-					if (SUCCEEDED(IDXGIOutput_GetDesc(pDXGIOutput, &outputDesc))) {
-						char *outputName = WIN_StringToUTF8(outputDesc.DeviceName);
-
-						if(!SDL_strcmp(outputName, displayName)) {
-							*adapterIndex = nAdapter;
-							*outputIndex = nOutput;
-						}
-
-						SDL_free( outputName );
-					}
-
-					IDXGIOutput_Release( pDXGIOutput );
-					nOutput++;
-				}
-
-				IDXGIAdapter_Release( pDXGIAdapter );
-				nAdapter++;
-			}
-			SDL_free(displayName);
-		}
-
-		/* free up the D3D stuff we inited */
-		IDXGIFactory_AddRef( pDXGIFactory );
-		SDL_UnloadObject(pDXGIDLL);
-	}
+    SDL_DisplayData *pData = (SDL_DisplayData *)SDL_GetDisplayDriverData(displayIndex);
+    void *pDXGIDLL;
+    IDXGIFactory *pDXGIFactory;
+    IDXGIAdapter *pDXGIAdapter;
+    IDXGIOutput* pDXGIOutput;
+    int nAdapter = 0, nOutput = 0;
+    char *displayName;
+
+    if (!adapterIndex) {
+        SDL_InvalidParamError("adapterIndex");
+        return SDL_FALSE;
+    }
+
+    if (!outputIndex) {
+        SDL_InvalidParamError("outputIndex");
+        return SDL_FALSE;
+    }
+
+    *adapterIndex = -1;
+    *outputIndex = -1;
+
+    if (!pData) {
+        SDL_SetError("Invalid display index");
+        return SDL_FALSE;
+    }
+
+    if (!DXGI_LoadDLL(&pDXGIDLL, &pDXGIFactory)) {
+        SDL_SetError("Unable to create DXGI interface");
+        return SDL_FALSE;
+    }
+
+    displayName = WIN_StringToUTF8(pData->DeviceName);
+    while (*adapterIndex == -1 && SUCCEEDED(IDXGIFactory_EnumAdapters(pDXGIFactory, nAdapter, &pDXGIAdapter))) {
+        while (*adapterIndex == -1 && SUCCEEDED(IDXGIAdapter_EnumOutputs(pDXGIAdapter, nOutput, &pDXGIOutput))) {
+            DXGI_OUTPUT_DESC outputDesc;
+            if (SUCCEEDED(IDXGIOutput_GetDesc(pDXGIOutput, &outputDesc))) {
+                char *outputName = WIN_StringToUTF8(outputDesc.DeviceName);
+                if (SDL_strcmp(outputName, displayName) == 0) {
+                    *adapterIndex = nAdapter;
+                    *outputIndex = nOutput;
+                }
+                SDL_free( outputName );
+            }
+            IDXGIOutput_Release(pDXGIOutput);
+            nOutput++;
+        }
+        IDXGIAdapter_Release(pDXGIAdapter);
+        nAdapter++;
+    }
+    SDL_free(displayName);
+
+    /* free up the DXGI factory */
+    IDXGIFactory_Release(pDXGIFactory);
+    SDL_UnloadObject(pDXGIDLL);
+
+    if (*adapterIndex == -1) {
+        return SDL_FALSE;
+    } else {
+        return SDL_TRUE;
+    }
 }
 
 #endif /* SDL_VIDEO_DRIVER_WINDOWS */