D3DKMDT_WIRE_FORMAT_AND_PREFERENCE - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// d3dkmdt.h

typedef union _D3DKMDT_WIRE_FORMAT_AND_PREFERENCE {
  struct {
    D3DKMDT_MODE_PREFERENCE Preference : 2;
    UINT                    Rgb : 6;
    UINT                    YCbCr444 : 6;
    UINT                    YCbCr422 : 6;
    UINT                    YCbCr420 : 6;
    UINT                    Intensity : 6;
  };
  UINT   Value;
} D3DKMDT_WIRE_FORMAT_AND_PREFERENCE, *PD3DKMDT_WIRE_FORMAT_AND_PREFERENCE;
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (ns-d3dkmdt-_d3dkmdt_wire_format_and_preference)

_D3DKMDT_WIRE_FORMAT_AND_PREFERENCE structure

Description

Holds information about the preferred pixel encoding format.

Members

Preference

Functions as it has in previous releases, but using only 2 bits.

Rgb

UINT describing supported/requested pixel encoding using RGB sample format.

YCbCr444

UINT describing supported/requested pixel encoding using YcbCr 4:4:4 sample format.

YCbCr422

UINT describing supported/requested pixel encoding using YcbCr 4:2:2 sample format.

YCbCr420

UINT describing supported/requested pixel encoding using YcbCr 4:2:0 sample format.

Intensity

UINT describing supported/requested pixel encoding using intensity only.

Value

UINT used to operate on the combined bit-fields.

Remarks

The five standard color sample formats for pixel transmission are exposed separately to allow the driver to report capabilities individually but it is expected that the vast majority of display devices will not support all sample formats as input, in particular support of intensity only signals is likely restricted to monochrome displays which should therefore not support color sample formats.

During mode enumeration via EnumVidPnCofuncModality, the driver should set values into all five fields to indicate the pixel encodings that are supported as inputs to the display device in the current configuration.

When SetTimingsFromVidPn is called, one of these fields will indicate the pixel encoding and sample format to be applied.

View the official Windows Driver Kit DDI reference

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