video.h header

This header is used by display. For more information, see:

• Display

video.h contains the following programming interfaces:

Functions

VideoPortAcquireDeviceLock The VideoPortAcquireDeviceLock function acquires the device lock maintained by the video port driver.
VideoPortAcquireSpinLock The VideoPortAcquireSpinLock function obtains the specified spin lock.
VideoPortAcquireSpinLockAtDpcLevel The VideoPortAcquireSpinLockAtDpcLevel function acquires a spin lock when the caller is already running at IRQL = DISPATCH_LEVEL.
VideoPortAllocateBuffer The VideoPortAllocateBuffer function is obsolete in Windows 2000 and later. In its place, video miniport drivers should instead use VideoPortAllocatePool. VideoPortAllocateBuffer allocates a buffer of paged pool memory.
VideoPortAllocateCommonBuffer The VideoPortAllocateCommonBuffer function allocates and maps system memory so that it is simultaneously accessible from both the processor and a device for common-buffer DMA operations.
VideoPortAllocateContiguousMemory The VideoPortAllocateContiguousMemory function is obsolete in Windows 2000 and later.
VideoPortAllocatePool The VideoPortAllocatePool function allocates a block of pool memory, inserting a caller-supplied tag at the beginning of the memory.
VideoPortAssociateEventsWithDmaHandle The VideoPortAssociateEventsWithDmaHandle function is obsolete in Windows 2000 and later.VideoPortAssociateEventsWithDmaHandle associates an event, which is shared by the video display driver and the video miniport driver, with a DMA handle.
VideoPortCheckForDeviceExistence The VideoPortCheckForDeviceExistence function determines whether the specified PCI device exists in the system.
VideoPortClearEvent The VideoPortClearEvent function sets a given event object to the nonsignaled state.
VideoPortCompareMemory The VideoPortCompareMemory function compares two blocks of system memory, byte-by-byte, and returns the number of compared bytes that are equivalent.
VideoPortCompleteDma The VideoPortCompleteDma function flushes any data remaining in a bus-master adapter's internal cache at the end of a DMA transfer operation, and then frees the previously allocated map registers and scatter/gather list used in scatter/gather DMA operations.
VideoPortCreateEvent The VideoPortCreateEvent function creates an event object.
VideoPortCreateSecondaryDisplay The VideoPortCreateSecondaryDisplay function enables dual-view support by creating a secondary device object for the given device.
VideoPortCreateSpinLock The VideoPortCreateSpinLock function creates a spin lock.
VideoPortDDCMonitorHelper Queries a monitor for EDID information using the DDC protocol.
VideoPortDebugPrint Video miniport drivers should not call the VideoPortDebugPrint function. Instead, they should call the VideoDebugPrint macro.
VideoPortDeleteEvent The VideoPortDeleteEvent function deletes the specified event object.
VideoPortDeleteSpinLock The VideoPortDeleteSpinLock function deletes a given spin lock.
VideoPortDisableInterrupt The VideoPortDisableInterrupt function is obsolete and should not be called.The VideoPortDisableInterrupt function disables interrupts from a video adapter.
VideoPortDoDma The VideoPortDoDma function is obsolete in Windows 2000 and later. VideoPortDoDma causes the miniport driver's HwVidStartDma function to be called.
VideoPortEnableInterrupt The VideoPortEnableInterrupt function is obsolete and should not be called.The VideoPortEnableInterrupt function reenables interrupts from a video adapter after a call to VideoPortDisableInterrupt.
VideoPortEnumerateChildren The VideoPortEnumerateChildren function allows a video miniport driver to force a reenumeration of its child devices.
VideoPortFlushRegistry The VideoPortFlushRegistry function flushes registry keys and values associated with the video miniport driver.
VideoPortFreeCommonBuffer The VideoPortFreeCommonBuffer function is obsolete and is supported only for backward compatibility with existing drivers.
VideoPortFreeDeviceBase The VideoPortFreeDeviceBase function frees a range of bus-relative device I/O ports or memory addresses previously mapped into the system address space. It does this by calling VideoPortGetDeviceBase.
VideoPortFreePool The VideoPortFreePool function deallocates a block of pool memory previously allocated by VideoPortAllocatePool.
VideoPortGetAccessRanges The VideoPortGetAccessRanges function retrieves bus-relative configuration information and, if possible, claims these hardware resources in the registry for the caller.
VideoPortGetAssociatedDeviceExtension The VideoPortGetAssociatedDeviceExtension function returns the device extension for the parent of the specified device object.
VideoPortGetAssociatedDeviceID The VideoPortGetAssociatedDeviceID function obtains the child ID for a specified device object.
VideoPortGetBusData The VideoPortGetBusData function returns bus-type-specific configuration information.
VideoPortGetBytesUsed The VideoPortGetBytesUsed function is obsolete in Windows 2000 and later.VideoPortGetBytesUsed determines the size, in bytes, of the buffer associated with a DMA handle.
VideoPortGetCommonBuffer The VideoPortGetCommonBuffer function is obsolete in Windows XP and later, and is supported only for backward compatibility with existing drivers.
VideoPortGetCurrentIrql The VideoPortGetCurrentIrql function gets the current IRQL.
VideoPortGetDeviceBase The VideoPortGetDeviceBase function maps a range of bus-relative device memory or I/O addresses into system space.
VideoPortGetDeviceData The VideoPortGetDeviceData function retrieves system-detected configuration information from the ..\Machine\Hardware\Description tree in the registry.
VideoPortGetDmaAdapter The VideoPortGetDmaAdapter function returns a pointer to a VP_DMA_ADAPTER structure, which is used in subsequent calls to other DMA-related functions.
VideoPortGetDmaContext The VideoPortGetDmaContext function is obsolete in Windows 2000 and later.VideoPortGetDmaContext gets the context previously associated with the specified DMA handle.
VideoPortGetMdl The VideoPortGetMdl function is obsolete in Windows 2000 and later.VideoPortGetMdl retrieves the memory descriptor list (MDL) that represents the page table of the locked buffer.
VideoPortGetRegistryParameters The VideoPortGetRegistryParameters function retrieves device-specific configuration information under the adapter key in the registry at startup.
VideoPortGetRomImage The VideoPortGetRomImage function (video.h) reads the device's read-only memory (ROM) and returns a pointer to a buffer containing the device's ROM (BIOS) data.
VideoPortGetVersion The VideoPortGetVersion function gets version information about the currently running operating system.
VideoPortGetVgaStatus The VideoPortGetVgaStatus function detects whether the calling device is decoding a VGA I/O address.
VideoPortInitialize The VideoPortInitialize function performs part of the miniport driver initialization, allocating system resources for the miniport driver.
VideoPortInt10 The VideoPortInt10 function performs the equivalent of an MS-DOS INT10 operation, such as setting the video mode. VideoPortInt10 runs the BIOS ROM code on the device.
VideoPortInterlockedDecrement The VideoPortInterlockedDecrement function decrements a caller-supplied variable as an atomic operation.
VideoPortInterlockedExchange The VideoPortInterlockedExchange function locks or unlocks a block of memory by setting a user-defined lock variable to TRUE or FALSE, respectively. It returns the previously-held value of the lock variable.
VideoPortInterlockedIncrement The VideoPortInterlockedIncrement function increments a caller-supplied variable as an atomic operation.
VideoPortIsNoVesa The VideoPortIsNoVesa function determines whether a video miniport driver that does not support Plug and Play (PnP) is restricted to legacy VGA resources.
VideoPortLockBuffer The VideoPortLockBuffer function probes the specified buffer, makes the buffer's memory pages resident in memory, and locks the physical pages mapped by the virtual address range.
VideoPortLockPages The VideoPortLockPages function is obsolete in Windows 2000 and later. Use VideoPortLockBuffer in place of this function.VideoPortLockPages locks the specified virtual memory and possibly performs part or all of a DMA transfer.
VideoPortLogError The VideoPortLogError function logs errors to the system event log when a miniport driver detects a hardware error condition during I/O operations.
VideoPortMapBankedMemory The VideoPortMapBankedMemory function is obsolete, and is supported only for Windows NT 4.0 and previous drivers.
VideoPortMapDmaMemory The VideoPortMapDmaMemory function is obsolete in Windows 2000 and later.VideoPortMapDmaMemory maps a range of memory for use in DMA transfers.
VideoPortMapMemory The VideoPortMapMemory function maps a range of bus-relative physical addresses of video memory into system space or into the virtual address space of a user-mode process.
VideoPortMoveMemory The VideoPortMoveMemory function copies data from the source location to the destination location in system memory.
VideoPortPutDmaAdapter The VideoPortPutDmaAdapter function frees a VP_DMA_ADAPTER structure that was previously allocated by a call to VideoPortGetDmaAdapter.
VideoPortQueryPerformanceCounter The VideoPortQueryPerformanceCounter function provides the finest-grained running count available in the system.
VideoPortQueryServices The VideoPortQueryServices function exposes a specified interface that is implemented by the video port driver.
VideoPortQuerySystemTime The VideoPortQuerySystemTime function obtains the current system time.
VideoPortQueueDpc The VideoPortQueueDpc function allows a miniport driver to queue a DPC.
VideoPortReadPortBufferUchar The VideoPortReadPortBufferUchar function reads a number of bytes from a mapped I/O port and writes them into a buffer.
VideoPortReadPortBufferUlong The VideoPortReadPortBufferUlong function reads a number of ULONG values from a mapped I/O port and writes them into a buffer.
VideoPortReadPortBufferUshort The VideoPortReadPortBufferUshort function reads a number of USHORT values from a mapped I/O port and writes them into a buffer.
VideoPortReadPortUchar The VideoPortReadPortUchar function reads a byte from a mapped I/O port.
VideoPortReadPortUlong The VideoPortReadPortUlong function reads a ULONG value from a mapped I/O port.
VideoPortReadPortUshort The VideoPortReadPortUshort function reads a USHORT value from a mapped I/O port.
VideoPortReadRegisterBufferUchar The VideoPortReadRegisterBufferUchar function reads a number of bytes from a mapped device memory range and writes them into a buffer.
VideoPortReadRegisterBufferUlong The VideoPortReadRegisterBufferUlong function reads a number of ULONG values from a mapped device memory range and writes them into a buffer.
VideoPortReadRegisterBufferUshort The VideoPortReadRegisterBufferUshort function reads a number of USHORT values from a mapped device memory range and writes them into a buffer.
VideoPortReadRegisterUchar The VideoPortReadRegisterUchar function reads a byte from a mapped register.
VideoPortReadRegisterUlong The VideoPortReadRegisterUlong function reads a ULONG value from a mapped register range.
VideoPortReadRegisterUshort The VideoPortReadRegisterUshort function reads a USHORT value from a mapped register range.
VideoPortReadStateEvent The VideoPortReadStateEvent function returns the current state of a given event object:_signaled or nonsignaled.
VideoPortRegisterBugcheckCallback The VideoPortRegisterBugcheckCallback function allows a video miniport driver to register for, or hook, a callback that is invoked when a specified bug check occurs.
VideoPortReleaseBuffer The VideoPortReleaseBuffer function is obsolete in Windows 2000 and later. In its place, video miniport drivers should instead use VideoPortFreePool. VideoPortReleaseBuffer deallocates a block of paged pool memory.
VideoPortReleaseCommonBuffer The VideoPortReleaseCommonBuffer function frees a common buffer that was previously allocated by VideoPortAllocateCommonBuffer.
VideoPortReleaseDeviceLock The VideoPortReleaseDeviceLock function releases the device lock acquired in a prior call to VideoPortAcquireDeviceLock.
VideoPortReleaseSpinLock The VideoPortReleaseSpinLock function releases ownership of a given spin lock and restores the original IRQL at which the caller was running.
VideoPortReleaseSpinLockFromDpcLevel The VideoPortReleaseSpinLockFromDpcLevel function releases the spin lock obtained by a previous call to VideoPortAcquireSpinLockAtDpcLevel.
VideoPortScanRom The VideoPortScanRom function is obsolete in Windows XP and later versions. It is supported only for backward compatibility. VideoPortScanRom performs a case-sensitive search for a specified string in ROM.
VideoPortSetBusData The VideoPortSetBusData function sets bus-configuration data for an adapter on a dynamically configurable I/O bus with a published, standard interface.
VideoPortSetBytesUsed The VideoPortSetBytesUsed function is obsolete in Windows 2000 and later.
VideoPortSetDmaContext The VideoPortSetDmaContext function is obsolete in Windows 2000 and later.
VideoPortSetEvent The VideoPortSetEvent function sets an event object to the signaled state if it was not already in that state, and returns the event object's previous state.
VideoPortSetRegistryParameters The VideoPortSetRegistryParameters function writes information under the adapter key in the registry.
VideoPortSetTrappedEmulatorPorts VGA-compatible (SVGA) miniport drivers call the VideoPortSetTrappedEmulatorPorts function to dynamically change the list of I/O ports that are trapped when a VDM runs in full-screen mode on an x86-based machine.
VideoPortSignalDmaComplete The VideoPortSignalDmaComplete function is obsolete in Windows 2000 and later.VideoPortSignalDmaComplete indicates to the video miniport driver whether the current DMA transfer is complete.
VideoPortStallExecution The VideoPortStallExecution function retains control of the processor for the specified number of microseconds and returns to the caller.
VideoPortStartDma The VideoPortStartDma function prepares the system for a DMA operation.
VideoPortStartTimer The VideoPortStartTimer function enables calls to a miniport driver's HwVidTimer function.
VideoPortStopTimer The VideoPortStopTimer function disables calls to a miniport driver's HwVidTimer function.
VideoPortSynchronizeExecution The VideoPortSynchronizeExecution function synchronizes the execution of a miniport driver-supplied HwVidSynchronizeExecutionCallback function with the miniport driver's HwVidInterrupt function, if any.
VideoPortUnlockBuffer The VideoPortUnLockBuffer function unlocks physical pages described by the specified memory descriptor list (MDL).
VideoPortUnlockPages The VideoPortUnlockPages function is obsolete in Windows 2000 and later. Use VideoPortUnlockBuffer in place of this function.VideoPortUnlockPages releases memory used for packet-based DMA.
VideoPortUnmapDmaMemory The VideoPortUnmapDmaMemory function is obsolete in Windows 2000 and later.VideoPortUnmapDmaMemory unmaps a range of memory previously mapped by VideoPortMapDmaMemory.
VideoPortUnmapMemory The VideoPortUnmapMemory function releases a mapping between a logical address range for the adapter and a virtual address range in the user-mode address space of a particular thread. This function is the complement of VideoPortMapMemory.
VideoPortVerifyAccessRanges The VideoPortVerifyAccessRanges function checks the registry for whether another driver has already claimed ownership of the specified bus-relative access ranges and any other hardware resources specified in the VIDEO_PORT_CONFIG_INFO structure.
VideoPortWaitForSingleObject The VideoPortWaitForSingleObject function puts the current thread into a wait state until the given dispatch object is set to the signaled state, or (optionally) until the wait times out.
VideoPortWritePortBufferUchar The VideoPortWritePortBufferUchar function writes a number of bytes to a mapped I/O port.
VideoPortWritePortBufferUlong The VideoPortWritePortBufferUlong function writes a number of ULONG values to a mapped I/O port.
VideoPortWritePortBufferUshort The VideoPortWritePortBufferUshort function writes a number of USHORT values to a mapped I/O port.
VideoPortWritePortUchar The VideoPortWritePortUchar function writes a byte to a mapped I/O port.
VideoPortWritePortUlong The VideoPortWritePortUlong function writes a ULONG value to a mapped I/O port.
VideoPortWritePortUshort The VideoPortWritePortUshort function writes a USHORT value to a mapped I/O port.
VideoPortWriteRegisterBufferUchar The VideoPortWriteRegisterBufferUchar function writes a number of unsigned bytes to a mapped register.
VideoPortWriteRegisterBufferUlong The VideoPortWriteRegisterBufferUlong function writes a number of ULONG values to a mapped register.
VideoPortWriteRegisterBufferUshort The VideoPortWriteRegisterBufferUshort function writes a number of USHORT values to a mapped register.
VideoPortWriteRegisterUchar The VideoPortWriteRegisterUchar function writes a byte to a mapped register.
VideoPortWriteRegisterUlong The VideoPortWriteRegisterUlong function writes a ULONG value to a mapped register.
VideoPortWriteRegisterUshort The VideoPortWriteRegisterUshort function writes a USHORT value to a mapped register.
VideoPortZeroDeviceMemory The VideoPortZeroDeviceMemory function fills an adapter frame buffer or other device memory with zeros.
VideoPortZeroMemory The VideoPortZeroMemory function fills a block of system memory with zeros.

Callback functions

PDRIVER_IO_PORT_UCHAR SvgaHwIoPortUchar traps an I/O port to which a full-screen MS-DOS application in an x86-based machine is sending UCHAR-sized data.
PDRIVER_IO_PORT_UCHAR_STRING SvgaHwIoPortUcharString traps an I/O port to which a full-screen MS-DOS application in an x86-based machine is sending a sequence of UCHAR-sized data.
PDRIVER_IO_PORT_ULONG SvgaHwIoPortUlong traps an I/O port range to which a full-screen MS-DOS application in an x86-based machine is sending a sequence of ULONG-sized data.
PDRIVER_IO_PORT_ULONG_STRING SvgaHwIoPortUlongString traps an I/O port range to which a full-screen MS-DOS application in an x86-based machine is sending a sequence of ULONG-sized data.
PDRIVER_IO_PORT_USHORT SvgaHwIoPortUshort traps an I/O port range to which a full-screen MS-DOS application in an x86-based machine is sending a sequence of USHORT-sized data.
PDRIVER_IO_PORT_USHORT_STRING SvgaHwIoPortUshortString traps an I/O port range to which a full-screen MS-DOS application in an x86-based machine is sending a sequence of USHORT-sized data.
PEXECUTE_DMA HwVidExecuteDma is a miniport driver-implemented callback routine that is responsible for retrieving physical address/length pairs from a scatter/gather list, and for programming the hardware to start the actual DMA transfer.
PI2C_READ The I2CRead function reads data over the I2C channel.
PI2C_START The I2CStart function starts I2C communication.
PI2C_STOP The I2CStop function ends I2C communication.
PI2C_WRITE The I2CWrite function writes data over the I2C channel.
PINT10_ALLOCATE_BUFFER The Int10AllocateBuffer function can be used to allocate a single 4 KB block of memory in the context of another thread. After the block of memory has been allocated, it must be freed before another block of memory can be allocated.
PINT10_CALL_BIOS The Int10CallBios function allows a miniport driver to call the kernel to perform an INT 10h operation, causing the BIOS ROM code on the device to execute natively.
PINT10_FREE_BUFFER The Int10FreeBuffer function frees a buffer previously allocated by Int10AllocateBuffer.
PINT10_READ_MEMORY The Int10ReadMemory function reads a block of memory in the context of another thread and stores it in an output buffer.
PINT10_WRITE_MEMORY The Int10WriteMemory function writes the contents of an input buffer to memory in the context of another thread.
PMINIPORT_DPC_ROUTINE The HwVidDpcRoutine function is a miniport driver-implemented callback that is called when a queued DPC gets scheduled.
PMINIPORT_GET_REGISTRY_ROUTINE HwVidQueryNamedValueCallback processes the specified data retrieved from the registry.
PMINIPORT_QUERY_DEVICE_ROUTINE HwVidQueryDeviceCallback uses the specified configuration data to configure its adapter, and, possibly, to fill in missing configuration information in the VIDEO_PORT_CONFIG_INFO structure.
PMINIPORT_SYNCHRONIZE_ROUTINE HwVidSynchronizeExecutionCallback is an optional miniport driver function, passed in calls to VideoPortSynchronizeExecution.
PROTECT_WC_MEMORY The VideoPortProtectWCMemory callback routine protects Write Combined (WC) video memory from being accessed by the CPU.
PVIDEO_BUGCHECK_CALLBACK The HwVidBugcheckCallback function enables the miniport driver to append data to a dump file when a bug check occurs.
PVIDEO_HW_FIND_ADAPTER HwVidFindAdapter performs initialization of data specific to the miniport driver and devices supported by the miniport driver.
PVIDEO_HW_GET_CHILD_DESCRIPTOR HwVidGetVideoChildDescriptor returns a descriptor, a type, and an identification number for a particular child device of the display adapter.
PVIDEO_HW_INITIALIZE HwVidInitialize performs the first initialization of the adapter, after the HAL has given up control of the video hardware to the video port driver.
PVIDEO_HW_INTERRUPT HwVidInterrupt detects and dismisses interrupts generated by the associated video adapter.
PVIDEO_HW_LEGACYRESOURCES HwVidLegacyResources returns a list of resources that are not listed in a device's PCI configuration space but that are decoded by the device.
PVIDEO_HW_POWER_GET HwVidGetPowerState queries whether the device can support the requested power state.
PVIDEO_HW_POWER_SET HwVidSetPowerState sets the power state of the specified device.
PVIDEO_HW_QUERY_INTERFACE HwVidQueryInterface returns a miniport driver-implemented functional interface that a child device can call.
PVIDEO_HW_RESET_HW HwVidResetHw resets the adapter to character mode.
PVIDEO_HW_START_IO HwVidStartIO processes the specified VRP.
PVIDEO_HW_TIMER HwVidTimer is a video miniport driver routine called at timed intervals by the video port driver.
PVIDEO_PORT_GET_PROC_ADDRESS The VideoPortGetProcAddress callback routine retrieves the address of a Windows 2000 or later video port driver function.
PVIDEO_READ_CLOCK_LINE ReadClockLine reads a single data bit from the I2C serial clock line.
PVIDEO_READ_DATA_LINE ReadDataLine reads a single data bit from the I2C serial data line.
PVIDEO_WRITE_CLOCK_LINE WriteClockLine sets the I2C serial clock line to high or low.
PVIDEO_WRITE_DATA_LINE WriteDataLine sets the I2C serial data line to high or low.
RESTORE_WC_MEMORY The VideoPortRestoreWCMemory callback routine restores Write Combined video memory from a protected state after the VideoPortProtectWCMemory callback routine was called.

Structures

DDC_CONTROL The DDC_CONTROL structure holds function pointers and EDID segment information needed by the VideoPortDDCMonitorHelper function, which is exported by the video port driver.
I2C_CALLBACKS The I2C_CALLBACKS structure contains pointers to functions, implemented by the video miniport driver, that read from and write to the serial data and serial clock lines of the I2C bus.
INT10_BIOS_ARGUMENTS The INT10_BIOS_ARGUMENTS structure is used to support full-screen MS-DOS application INT10 calls. It contains nine of the high-end x86 microprocessor registers.
QUERY_INTERFACE The QUERY_INTERFACE structure describes the interface being requested.
STATUS_BLOCK The STATUS_BLOCK structure is a substructure within the VIDEO_REQUEST_PACKET structure. A miniport driver's HwVidStartIO function must set the status block of each VRP that it gets.
VIDEO_ACCESS_RANGE The VIDEO_ACCESS_RANGE structure defines a device I/O port or memory range for the video adapter.
VIDEO_CHILD_ENUM_INFO Describes the child device to be enumerated by the miniport driver. All members are set by the video port driver.
VIDEO_CHILD_STATE The VIDEO_CHILD_STATE structure contains information about a child device and the state into which it should be placed.
VIDEO_CHILD_STATE_CONFIGURATION The VIDEO_CHILD_STATE_CONFIGURATION structure contains an array of VIDEO_CHILD_STATE structures, each holding the state of a particular child device.
VIDEO_HW_INITIALIZATION_DATA The VIDEO_HW_INITIALIZATION_DATA structure specifies the entry points and storage requirements for the miniport driver. This structure is created on the stack and initialized by the miniport driver's DriverEntry function.
VIDEO_PORT_AGP_INTERFACE The VIDEO_PORT_AGP_INTERFACE structure describes the AGP service routines provided by the video port driver.
VIDEO_PORT_AGP_INTERFACE_2 The VIDEO_PORT_AGP_INTERFACE_2 structure describes the AGP service routines provided by the video port driver.
VIDEO_PORT_CONFIG_INFO The VIDEO_PORT_CONFIG_INFO structure contains bus-specific adapter configuration information.
VIDEO_PORT_DEBUG_REPORT_INTERFACE The VIDEO_PORT_DEBUG_REPORT_INTERFACE structure holds pointers to the Debug Report functions, which are implemented by the video port driver.
VIDEO_PORT_I2C_INTERFACE The VIDEO_PORT_I2C_INTERFACE structure describes the I2C service routines provided by the video port driver.
VIDEO_PORT_INT10_INTERFACE The VIDEO_PORT_INT10_INTERFACE structure provides a way to allocate and deallocate memory in another thread's context, read from and write to that memory, and make INT10 BIOS calls.
VIDEO_PORT_WCMEMORYPROTECTION_INTERFACE The VIDEO_PORT_WCMEMORYPROTECTION_INTERFACE structure describes the Write Combined video memory protection service routines implemented by the video port driver. The protected video memory cannot be accessed by the CPU.
VIDEO_REQUEST_PACKET A pointer to a VIDEO_REQUEST_PACKET structure is passed to the miniport driver's HwVidStartIO function by the video port driver.
VIDEO_X86_BIOS_ARGUMENTS The VIDEO_x86_BIOS_ARGUMENTS structure is used to support full-screen MS-DOS application INT10 calls. It contains seven of the high-end x86 microprocessor registers.
VP_DEVICE_DESCRIPTION The VP_DEVICE_DESCRIPTION structure describes the attributes of the physical device for which a driver is requesting a DMA object.
VP_SCATTER_GATHER_ELEMENT The VP_SCATTER_GATHER_ELEMENT structure is used to store information about a single scatter/gather element.
VP_SCATTER_GATHER_LIST The VP_SCATTER_GATHER_LIST structure is a collection of one or more scatter/gather elements.
VPOSVERSIONINFO The VPOSVERSIONINFO structure contains version information about the currently running operating system.

Enumerations

VIDEO_PORT_SERVICES The VIDEO_PORT_SERVICES enumerated type lists the interfaces that the video miniport driver can request from the video port driver by calling VideoPortQueryServices.