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Added SDL_DXGIGetOutputInfo which returns the adapter and output indices that are used to create DX10 and DX11 devices and swap chains on a particular display.

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CR: SamL
This commit is contained in:
Sam Lantinga
2014-02-13 11:05:30 -08:00
parent e34da6801f
commit c52c91056b
5 changed files with 100 additions and 2 deletions
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85
src/video/windows/SDL_windowsvideo.c
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@@ -245,6 +245,91 @@ SDL_Direct3D9GetAdapterIndex( int displayIndex )
}
}
#define CINTERFACE
#define COBJMACROS
#include <DXGI.h>
SDL_bool
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, 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 )
{
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);
}
}
#endif /* SDL_VIDEO_DRIVER_WINDOWS */
/* vim: set ts=4 sw=4 expandtab: */