DDKERNELCAPS structure

The DDKERNELCAPS structure notifies the client what support, if any, exists in the miniport driver for the kernel-mode video transport.

Syntax


typedef struct _DDKERNELCAPS {
  DWORD dwSize;
  DWORD dwCaps;
  DWORD dwIRQCaps;
} DDKERNELCAPS, *LPDDKERNELCAPS;

Members

dwSize

Specifies the size, in bytes, of this structure. This member must be initialized before the structure is used.

dwCaps

Specifies a set of flags indicating the device's capabilities. This member can be any combination of the following capabilities:

FlagMeaning

DDKERNELCAPS_AUTOFLIP

The driver supports the DxFlipVideoPort and the DxFlipOverlay callbacks, and that these callbacks can be used for autoflipping.

DDKERNELCAPS_CAPTURE_INVERTED

The device supports inverting the DIBs while capturing the data.

DDKERNELCAPS_CAPTURE_NONLOCALVIDMEM

The device supports a video port extensions (VPE) capture interface capable of transferring data to nonlocal display memory.

DDKERNELCAPS_CAPTURE_SYSMEM

The device supports a VPE capture interface capable of transferring data to system memory.

DDKERNELCAPS_FIELDPOLARITY

The device can report the polarity (even/odd) of the current VPE object field.

DDKERNELCAPS_FLIPOVERLAY

The driver supports the DxFlipOverlay callback.

DDKERNELCAPS_FLIPVIDEOPORT

The driver supports the DxFlipVideoPort callback.

DDKERNELCAPS_LOCK

The device supports accessing the frame buffer without causing contention with blitters, and so on, and that the driver supports the DxLock callback.

DDKERNELCAPS_SETSTATE

The driver supports the DxSetState callback, allowing a client to switch between bob and weave display modes.

DDKERNELCAPS_SKIPFIELDS

The device supports field skipping, either using hardware or by supporting the DxSkipNextField callback.

 

dwIRQCaps

Can be a combination of the following flags:

FlagMeaning

DDIRQ_DISPLAY_VSYNC

The device can generate IRQs based on the display VSYNC.

DDIRQ_VPORT0_LINE

The device can generate IRQs based on a programmable line for hardware video port number 0.

DDIRQ_VPORT0_VSYNC

The device can generate VSYNC IRQs for hardware video port number 0.

DDIRQ_VPORT1_LINE

The device can generate IRQs based on a programmable line for hardware video port number 1.

DDIRQ_VPORT1_VSYNC

The device can generate V-sync IRQs for hardware video port number 1

DDIRQ_VPORT2_LINE

The device can generate IRQs based on a programmable line for hardware video port number 2.

DDIRQ_VPORT2_VSYNC

The device can generate V-sync IRQs for hardware video port number 2.

DDIRQ_VPORT3_LINE

The device can generate IRQs based on a programmable line for hardware video port number 3.

DDIRQ_VPORT3_VSYNC

The device can generate V-sync IRQs for hardware video port number 3.

DDIRQ_VPORT4_LINE

The device can generate IRQs based on a programmable line for hardware video port number 4.

DDIRQ_VPORT4_VSYNC

The device can generate V-sync IRQs for hardware video port number 4.

DDIRQ_VPORT5_LINE

The device can generate IRQs based on a programmable line for hardware video port number 5.

DDIRQ_VPORT5_VSYNC

The device can generate V-sync IRQs for hardware video port number 5.

DDIRQ_VPORT6_LINE

The device can generate IRQs based on a programmable line for hardware video port number 6.

DDIRQ_VPORT6_VSYNC

The device can generate V-sync IRQs for hardware video port number 6.

DDIRQ_VPORT7_LINE

The device can generate IRQs based on a programmable line for hardware video port number 7.

DDIRQ_VPORT7_VSYNC

The device can generate V-sync IRQs for hardware video port number 7.

DDIRQ_VPORT8_LINE

The device can generate IRQs based on a programmable line for hardware video port number 8.

DDIRQ_VPORT8_VSYNC

The device can generate V-sync IRQs for hardware video port number 8.

DDIRQ_VPORT9_LINE

he device can generate IRQs based on a programmable line for hardware video port number 9.

DDIRQ_VPORT9_VSYNC

he device can generate V-sync IRQs for hardware video port number 9.

 

Requirements

Header

Ddkernel.h (include Ddkernel.h)

See also

DxFlipOverlay
DxFlipVideoPort
DxLock
DxSetState
DxSkipNextField

 

 

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