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[WIN32SS] Change LDEVOBJ_bProbeAndCaptureDevmode to account for not provided fields when searching an exact mode

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This fixes mode change if an application requests (for example) 640x480x32, without providing display frequency.
This commit is contained in:
Hervé Poussineau
2022-09-28 18:26:44 +02:00
parent 29d1938258
commit 7278ed2015
1 changed files with 25 additions and 2 deletions
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27
win32ss/gdi/eng/ldevobj.c
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@@ -804,9 +804,9 @@ LDEVOBJ_bProbeAndCaptureDevmode(
if (!bResult)
return FALSE;
if (bSearchClosestMode)
if (LDEVOBJ_bGetClosestMode(pGraphicsDevice, &dmSearch, &pdmSelected))
{
if (LDEVOBJ_bGetClosestMode(pGraphicsDevice, &dmSearch, &pdmSelected))
if (bSearchClosestMode)
{
/* Ok, found a closest mode. Update search */
dmSearch.dmBitsPerPel = pdmSelected->dmBitsPerPel;
@@ -814,6 +814,29 @@ LDEVOBJ_bProbeAndCaptureDevmode(
dmSearch.dmPelsHeight = pdmSelected->dmPelsHeight;
dmSearch.dmDisplayFrequency = pdmSelected->dmDisplayFrequency;
}
else
{
/* Only update not provided fields */
_SEH2_TRY
{
if (!(RequestedMode->dmFields & DM_BITSPERPEL) || RequestedMode->dmBitsPerPel == 0)
dmSearch.dmBitsPerPel = pdmSelected->dmBitsPerPel;
if (!(RequestedMode->dmFields & DM_PELSWIDTH) || RequestedMode->dmPelsWidth == 0)
dmSearch.dmPelsWidth = pdmSelected->dmPelsWidth;
if (!(RequestedMode->dmFields & DM_PELSHEIGHT) || RequestedMode->dmPelsHeight == 0)
dmSearch.dmPelsHeight = pdmSelected->dmPelsHeight;
if (!(RequestedMode->dmFields & DM_DISPLAYFREQUENCY) || RequestedMode->dmDisplayFrequency == 0)
dmSearch.dmDisplayFrequency = pdmSelected->dmDisplayFrequency;
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
bResult = FALSE;
}
_SEH2_END;
if (!bResult)
return FALSE;
}
}
/* Now, search the exact mode to return to caller */