DXGI_DDI_PRIMARY_DESC - NtDoc
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// dxgiddi.h
typedef struct DXGI_DDI_PRIMARY_DESC {
[in] UINT Flags;
[in] D3DDDI_VIDEO_PRESENT_SOURCE_ID VidPnSourceId;
[in] DXGI_DDI_MODE_DESC ModeDesc;
[out] UINT DriverFlags;
} DXGI_DDI_PRIMARY_DESC;
View the official Windows Driver Kit DDI referenceNo description available.
Describes a resource that is used as a primary (that is, a resource that is scanned out to the display).
Flags [in]A valid bitwise OR of any of the following values that indicates how the resource is displayed.
| Value | Meaning |
|---|---|
| DXGI_DDI_PRIMARY_OPTIONAL (0x1) | The user-mode display driver can prevent the resource from ever being a primary. The driver can prevent the actual flip (from optional primary to regular primary) and can use a copy-style present operation. Therefore, in this way, the driver might be able to prevent the resource from being actually used as a primary. |
| DXGI_DDI_PRIMARY_NONPREROTATED (0x2) | The primary really represents the DXGI_DDI_MODE_ROTATION_IDENTITY-type rotation, even though it is used with non-DXGI_DDI_MODE_ROTATION_IDENTITY-type display modes, because applications will handle the output orientation by rotating, for example, the viewport and projection matrix. |
| DXGI_DDI_PRIMARY_STEREO (0x4) | Supported in Windows 8 and later versions. The primary represents a stereo back buffer. |
| DXGI_DDI_PRIMARY_INDIRECT (0x8) | Supported in Windows 10 and later versions. The primary will be used for presenting to an indirect display device. |
VidPnSourceId [in]The zero-based identification number of the video present source in a path of a video present network (VidPN) topology that the primary surface is created on.
ModeDesc [in]A DXGI_DDI_MODE_DESC structure that describes the display mode.
DriverFlags [out]A valid bitwise OR of values that indicate how the driver can display the resource.
The DXGI_DDI_PRIMARY_DRIVER_FLAG_NO_SCANOUT (0x1) value is currently the only supported value. This bit indicates that the driver cannot support the runtime setting any subresource of the specified resource as a primary. The user-mode display driver should set this bit if it implements presentation from this surface through a copy operation. Therefore, the runtime will not use flip-style presentation if this bit is set.