Class Dxgi

java.lang.Object

oshi.jna.platform.windows.Dxgi

public final class Dxgi
extends Object

Minimal JNA binding to dxgi.dll for enumerating display adapters and reading DXGI_ADAPTER_DESC.DedicatedVideoMemory.

DXGI is the authoritative Windows API for dedicated GPU memory. It is not subject to the 2 GiB cap that affects the 32-bit registry value HardwareInformation.MemorySize.

COM vtable layout used here:

IUnknown   (vtable slots 0-2):  QueryInterface, AddRef, Release
IDXGIObject (slots 3-6):        SetPrivateData, SetPrivateDataInterface, GetPrivateData, GetParent
IDXGIFactory (slots 7-13):      EnumAdapters, MakeWindowAssociation, GetWindowAssociation,
                                 CreateSwapChain, CreateSoftwareAdapter, (IDXGIFactory1 adds 2 more)
IDXGIAdapter (slots 3-5 on adapter): EnumOutputs, GetDesc, CheckInterfaceSupport

This class should be considered non-API as it may be removed if/when its code is incorporated into the JNA project.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Dxgi.DXGI_ADAPTER_DESC	Maps to the Windows DXGI_ADAPTER_DESC structure.

Method Summary

Modifier and Type	Method	Description
static List<oshi.driver.common.windows.gpu.DxgiAdapterInfo>	queryAdapters()	Enumerates all DXGI display adapters and returns their identity and dedicated video memory.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

queryAdapters

public static List<oshi.driver.common.windows.gpu.DxgiAdapterInfo> queryAdapters()

Enumerates all DXGI display adapters and returns their identity and dedicated video memory.

Fails gracefully: if dxgi.dll is unavailable or any COM call fails, returns an empty list so callers can fall back to registry-based detection.

Returns:

list of DxgiAdapterInfo, one per adapter; empty if DXGI is unavailable