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IDXGIOutput1::FindClosestMatchingMode1 method (dxgi1_2.h)

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Finds the display mode that most closely matches the requested display mode.

Syntax

HRESULT FindClosestMatchingMode1(
  [in]           const DXGI_MODE_DESC1 *pModeToMatch,
  [out]          DXGI_MODE_DESC1       *pClosestMatch,
  [in, optional] IUnknown              *pConcernedDevice
);

Parameters

[in] pModeToMatch

A pointer to the DXGI_MODE_DESC1 structure that describes the display mode to match. Members of DXGI_MODE_DESC1 can be unspecified, which indicates no preference for that member. A value of 0 for Width or Height indicates that the value is unspecified. If either Width or Height is 0, both must be 0. A numerator and denominator of 0 in RefreshRate indicate it is unspecified. Other members of DXGI_MODE_DESC1 have enumeration values that indicate that the member is unspecified. If pConcernedDevice is NULL, the Format member of DXGI_MODE_DESC1 cannot be DXGI_FORMAT_UNKNOWN.

[out] pClosestMatch

A pointer to the DXGI_MODE_DESC1 structure that receives a description of the display mode that most closely matches the display mode described at pModeToMatch.

[in, optional] pConcernedDevice

A pointer to the Direct3D device interface. If this parameter is NULL, FindClosestMatchingMode1 returns only modes whose format matches that of pModeToMatch; otherwise, FindClosestMatchingMode1 returns only those formats that are supported for scan-out by the device. For info about the formats that are supported for scan-out by the device at each feature level:

Return value

Returns one of the error codes described in the DXGI_ERROR topic.

Remarks

Direct3D devices require UNORM formats.

FindClosestMatchingMode1 finds the closest matching available display mode to the mode that you specify in pModeToMatch.

If you set the Stereo member in the DXGI_MODE_DESC1 structure to which pModeToMatch points to specify a stereo mode as input, FindClosestMatchingMode1 considers only stereo modes. FindClosestMatchingMode1 considers only mono modes if Stereo is not set.

FindClosestMatchingMode1 resolves similarly ranked members of display modes (that is, all specified, or all unspecified, and so on) in the following order:

  1. ScanlineOrdering
  2. Scaling
  3. Format
  4. Resolution
  5. RefreshRate
When FindClosestMatchingMode1 determines the closest value for a particular member, it uses previously matched members to filter the display mode list choices, and ignores other members. For example, when FindClosestMatchingMode1 matches Resolution, it already filtered the display mode list by a certain ScanlineOrdering, Scaling, and Format, while it ignores RefreshRate. This ordering doesn't define the absolute ordering for every usage scenario of FindClosestMatchingMode1, because the application can choose some values initially, which effectively changes the order of resolving members.

FindClosestMatchingMode1 matches members of the display mode one at a time, generally in a specified order.

If a member is unspecified, FindClosestMatchingMode1 gravitates toward the values for the desktop related to this output. If this output is not part of the desktop, FindClosestMatchingMode1 uses the default desktop output to find values. If an application uses a fully unspecified display mode, FindClosestMatchingMode1 typically returns a display mode that matches the desktop settings for this output.
Because unspecified members are lower priority than specified members, FindClosestMatchingMode1 resolves unspecified members later than specified members.

Requirements

Requirement Value
Minimum supported client Windows 8 and Platform Update for Windows 7 [desktop apps | UWP apps]
Minimum supported server Windows Server 2012 and Platform Update for Windows Server 2008 R2 [desktop apps | UWP apps]
Target Platform Windows
Header dxgi1_2.h
Library DXGI.lib

See also

IDXGIOutput1