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Load QueryDisplayConfig symbols on-demand.

This commit is contained in:
Brandon Wright 2018-05-27 17:56:53 -05:00
parent 0208dfc980
commit eb82a9f706
1 changed files with 20 additions and 2 deletions
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22
win32/win32_display.cpp
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@ -685,7 +685,25 @@ void WinEnumDisplayModes(std::vector<dMode> *modeVector)
double WinGetRefreshRate(void) double WinGetRefreshRate(void)
{ {
typedef LONG(WINAPI *PGDCBS) (UINT32, UINT32 *, UINT32 *);
typedef LONG(WINAPI *PQDC) (UINT32, UINT32*, DISPLAYCONFIG_PATH_INFO *, UINT32*, DISPLAYCONFIG_MODE_INFO *, DISPLAYCONFIG_TOPOLOGY_ID *);
static PGDCBS pGDCBS = NULL;
static PQDC pQDC = NULL;
static int firstrun = 1;
if (firstrun)
{
HMODULE user32 = GetModuleHandleA("user32.dll");
pQDC = (PQDC) GetProcAddress(user32, "QueryDisplayConfig");
pGDCBS = (PGDCBS) GetProcAddress(user32, "GetDisplayConfigBufferSizes");
firstrun = 0;
}
double refreshRate = 0.0; double refreshRate = 0.0;
if (!pGDCBS || !pQDC)
return refreshRate;
OSVERSIONINFO ovi; OSVERSIONINFO ovi;
DISPLAYCONFIG_TOPOLOGY_ID topologyID; DISPLAYCONFIG_TOPOLOGY_ID topologyID;
unsigned int numPathArrayElements = 0; unsigned int numPathArrayElements = 0;
@ -701,7 +719,7 @@ double WinGetRefreshRate(void)
if (ovi.dwMajorVersion < 6 || (ovi.dwMajorVersion == 6 && ovi.dwMinorVersion < 1)) if (ovi.dwMajorVersion < 6 || (ovi.dwMajorVersion == 6 && ovi.dwMinorVersion < 1))
return refreshRate; return refreshRate;
result = GetDisplayConfigBufferSizes(QDC_DATABASE_CURRENT, result = pGDCBS(QDC_DATABASE_CURRENT,
&numPathArrayElements, &numPathArrayElements,
&numModeInfoArrayElements); &numModeInfoArrayElements);
@ -713,7 +731,7 @@ double WinGetRefreshRate(void)
modeInfoArray = (DISPLAYCONFIG_MODE_INFO *) modeInfoArray = (DISPLAYCONFIG_MODE_INFO *)
malloc(sizeof(DISPLAYCONFIG_MODE_INFO) * numModeInfoArrayElements); malloc(sizeof(DISPLAYCONFIG_MODE_INFO) * numModeInfoArrayElements);
result = QueryDisplayConfig(QDC_DATABASE_CURRENT, result = pQDC(QDC_DATABASE_CURRENT,
&numPathArrayElements, &numPathArrayElements,
pathInfoArray, pathInfoArray,
&numModeInfoArrayElements, &numModeInfoArrayElements,