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DDKERNELCAPS structure (ddkernel.h)

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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;
} *LPDDKERNELCAPS, DDKERNELCAPS;

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:

Flag Meaning
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:

Flag Meaning
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

Requirement Value
Header ddkernel.h (include Ddkernel.h)

See also

DxFlipOverlay

DxFlipVideoPort

DxLock

DxSetState

DxSkipNextField