VIDEO_PUBLIC_ACCESS_RANGES - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// ntddvdeo.h
typedef struct _VIDEO_PUBLIC_ACCESS_RANGES {
ULONG InIoSpace;
ULONG MappedInIoSpace;
PVOID VirtualAddress;
} VIDEO_PUBLIC_ACCESS_RANGES, *PVIDEO_PUBLIC_ACCESS_RANGES;
View the official Windows Driver Kit DDI referenceNo description available.
The VIDEO_PUBLIC_ACCESS_RANGES structure contains information about video resources other than frame buffers and video RAM, such as memory-mapped I/O registers or ports.
InIoSpaceIndicates the location of the range. This parameter can be one of the following values, or certain bitwise combinations of these values:
| Value | Meaning |
|---|---|
| VIDEO_MEMORY_SPACE_DENSE | Obsolete. |
| VIDEO_MEMORY_SPACE_IO | The indicated address ranges are in system I/O space rather than in memory space. |
| VIDEO_MEMORY_SPACE_MEMORY | The indicated address ranges are in memory space rather than in system I/O space. |
| VIDEO_MEMORY_SPACE_P6CACHE | The processor aggregates a sequence of write operations and sends them to a given cache line. The processor then flushes the cache. This flag is meaningful only when VIDEO_MEMORY_SPACE_IO is not set. |
| VIDEO_MEMORY_SPACE_USER_MODE | Indicates that the address range specified should be mapped into user mode rather than kernel mode. This flag is meaningful only when VIDEO_MEMORY_SPACE_IO is not set. |
MappedInIoSpaceIndicates, on the current platform, whether the registers or ports are mapped in I/O space or in memory space. A value of TRUE (1) indicates that the registers or ports are mapped in I/O space; a value of FALSE (0) indicates that the registers or ports are mapped in memory space.
VirtualAddressPointer to the location of the registers or I/O ports as mapped under the current architecture.
VIDEO_PUBLIC_ACCESS_RANGES is similar to VIDEO_ACCESS_RANGE in that both are used by miniport drivers to obtain information about display resources. The principal difference is that VIDEO_PUBLIC_ACCESS_RANGES contains information about control and accelerator registers for an adapter, while VIDEO_ACCESS_RANGE is used to hold frame buffer and video RAM addresses.
VIDEO_PUBLIC_ACCESS_RANGES is used as an input buffer with the IOCTL_VIDEO_QUERY_PUBLIC_ACCESS_RANGES request.
IOCTL_VIDEO_QUERY_PUBLIC_ACCESS_RANGES