D3DKMTCreateAllocation2 函式 (d3dkmthk.h)

D3DKMTCreateAllocation2 函式會建立或新增系統或視訊記憶體的配置。

語法

NTSTATUS D3DKMTCreateAllocation2(
  D3DKMT_CREATEALLOCATION *unnamedParam1
);

參數

unnamedParam1

[in， out] pData：包含建立配置資訊 之D3DKMT_CREATEALLOCATION 結構的指標。

傳回值

如果作業成功，D3DKMTCreateAllocation2 會傳回STATUS_SUCCESS。 否則，它可能會傳回 NTSTATUS 程式代碼，例如下列其中一個值：

備註

使用者模式圖形用戶端可以呼叫 D3DKMTCreateAllocation2 來建立配置和資源。 配置可以與資源相關聯，也可以獨立配置。

您也可以呼叫 D3DKMTCreateAllocation2 ，隨時將額外的配置新增至資源。 唯一的限制是所有共用配置都必須與資源相關聯，而且無法將其他配置新增至現有的共享資源。

範例

在未與資源相關聯的視訊記憶體中建立獨立配置

下列程式代碼範例示範使用者模式圖形用戶端如何使用 D3DKMTCreateAllocation2 在未與資源相關聯的視訊記憶體中建立獨立配置。

D3DKMT_HANDLE CreateStandAloneAllocation(D3DKMT_HANDLE hDevice, VOID* pPrivateAllocationInfo, UINT Size)
{
    D3DKMT_CREATEALLOCATION CreateAllocation;
    D3DDDI_ALLOCATIONINFO2 AllocationInfo;

    memset(&CreateAllocation, 0, sizeof(CreateAllocation));
    CreateAllocation.hDevice = hDevice;
    CreateAllocation.NumAllocations = 1;
    CreateAllocation.pAllocationInfo2 = &AllocationInfo;

    AllocationInfo.hAllocation = NULL;
    AllocationInfo.pSystemMem = NULL;  // Vidmem allocation
    AllocationInfo.pPrivateDriverData = pPrivateAllocationInfo;  // Contains format, size, and so on.
    AllocationInfo.PrivateDriverDataSize = Size;

    if (NT_SUCCESS((*pfnKTCreateAllocation)(&CreateAllocation))) {
        return AllocationInfo.hAllocation;
    }
    return 0;
}

使用單一系統記憶體配置建立資源

下列程式代碼範例示範使用者模式圖形用戶端如何使用 D3DKMTCreateAllocation2 來建立具有單一系統記憶體配置的資源。

HRESULT CreateSysmemResource(D3DKMT_HANDLE hDevice, 
                             UINT AllocationSize, 
                             VOID* pResourceData, 
                             UINT ResourceDataSize,
                             VOID* pAllocationData, 
                             UINT AllocationDataSize,
                             D3DKMT_HANDLE* phResource,
                             D3DKMT_HANDLE* phAllocation)
{
    D3DKMT_CREATEALLOCATION CreateAllocation;
    D3DDDI_ALLOCATIONINFO2 AllocationInfo;
    VOID* pSysMem;

    *phResource = NULL;
    *phAllocation = NULL;

    // For a sysmem allocation, preallocate the memory.
    pSysMem = MemAlloc(AllocationSize);
    if (pSysMem == NULL) {
        return E_OUTOFMEMORY;
    }
 
    memset(&CreateAllocation, 0, sizeof(CreateAllocation));
    CreateAllocation.hDevice = hDevice;
    CreateAllocation.Flags.CreateResource = TRUE;
    CreateAllocation.pPrivateDriverData = pResourceData;
    CreateAllocation.PrivateDriverDataSize = ResourceDataSize;
    CreateAllocation.NumAllocations = 1;
    CreateAllocation.pAllocationInfo = &AllocationInfo;

    AllocationInfo.hAllocation = NULL;
    AllocationInfo.pSystemMem = pSysMem;
    AllocationInfo.pPrivateDriverData = pAllocationData;
    AllocationInfo.PrivateDriverDataSize = AllocationDataSize;

    if (NT_SUCCESS((*pfnKTCreateAllocation)(&CreateAllocation))) {
        *phResource = CreateAllocation.hResource;
        *phAllocation = AllocationInfo.hAllocation;
        return S_OK;
    }
    MemFree(pSysMem);
    return E_FAIL;
}

規格需求

另請參閱

D3DKMT_CREATEALLOCATION