PFND3D10DDI_RESOURCEMAP callback function (d3d10umddi.h)
The ResourceMap function maps a subresource of a resource.
Syntax
PFND3D10DDI_RESOURCEMAP Pfnd3d10ddiResourcemap;
void Pfnd3d10ddiResourcemap(
D3D10DDI_HDEVICE unnamedParam1,
D3D10DDI_HRESOURCE unnamedParam2,
UINT unnamedParam3,
D3D10_DDI_MAP unnamedParam4,
UINT unnamedParam5,
D3D10DDI_MAPPED_SUBRESOURCE *unnamedParam6
)
{...}
Parameters
unnamedParam1
hDevice [in]
A handle to the display device (graphics context).
unnamedParam2
hResource [in]
A handle to the resource to map.
unnamedParam3
Subresource [in]
An index that indicates the subresource to map.
unnamedParam4
DDIMap [in]
A D3D10_DDI_MAP-typed value that indicates the access level to map the subresource to.
unnamedParam5
Flags [in]
A D3D10_DDI_MAP_FLAG-typed value that indicates how to map the subresource.
unnamedParam6
pMappedSubResource [out]
A pointer to a D3D10DDI_MAPPED_SUBRESOURCE structure that receives the information about the mapped subresource.
Return value
None
Remarks
The driver can use the pfnSetErrorCb callback function to set an error code.
The driver can call pfnSetErrorCb to set the D3DDDIERR_DEVICEREMOVED error code.
Typically, immediately after the runtime receives the D3DDDIERR_DEVICEREMOVED error code, the runtime will no longer call into the user-mode display driver for much (other than for unbinding, destruction, and other cleanup operations).
Typically, each call to the user-mode display driver's ResourceMap function is accompanied with a call to the driver's ResourceUnmap function; however, after the runtime receives the D3DDDIERR_DEVICEREMOVED error code, it will not call ResourceUnmap.
If the runtime passed the D3D10_DDI_MAP_FLAG_DONOTWAIT flag in the Flags parameter, the driver can call pfnSetErrorCb to set the DXGI_DDI_ERR_WASSTILLDRAWING error code.
The driver can implement one pair of ResourceMap and ResourceUnmap functions that can contain switch statements to process various functionalities. That is, the driver can implement one ResourceMap-ResourceUnmap pair and can set the following members of the D3D10DDI_DEVICEFUNCS structure to point to this implementation pair:
pfnDynamicIABufferMapDiscard-pfnDynamicIABufferUnmap
pfnDynamicIABufferMapNoOverwrite-pfnDynamicIABufferUnmap
pfnDynamicConstantBufferMapDiscard-pfnDynamicConstantBufferUnmap
pfnDynamicResourceMapDiscard-pfnDynamicResourceUnmap
pfnStagingResourceMap-pfnStagingResourceUnmap
However, to improve performance, the driver can implement separate map-unmap function pairs. The Microsoft Direct3D runtime calls the appropriate map-unmap function pair depending on the resource type (for example, a buffer or texture) and the type of D3D10_DDI_RESOURCE_USAGE, D3D10_DDI_RESOURCE_BIND_FLAG, and D3D10_DDI_MAP values that are specified when the resource is created and mapped.
Note
If the resource type to map and unmap is a buffer, the Direct3D runtime sets the Subresource parameter to zero.
Although the Direct3D runtime typically calls the pfnDynamicResourceMapDiscard-pfnDynamicResourceUnmap function pair for dynamic textures, the runtime also calls this function pair for dynamic buffers that were created with the D3D10_DDI_BIND_SHADER_RESOURCE bind flag set.
The following example code shows the values that are set when the Direct3D runtime calls specific map or unmap function:
//-----------------------------------------------
void APIENTRY UMDevice::DynamicIABufferMapNoOverwrite_Default(
D3D10DDI_HDEVICE hDevice,
D3D10DDI_HRESOURCE hResource,
UINT Subresource,
D3D10_DDI_MAP MapType,
UINT MapFlags,
D3D10DDI_MAPPED_SUBRESOURCE* pMappedSubresource )
{
UMDevice* pThis = UMDevice::CastFrom( hDevice );
UMResource* pResource = UMResource::CastFrom( hResource );
assert( pResource->m_DDICreateResource.ResourceDimension == D3D10DDIRESOURCE_BUFFER &&
pResource->m_DDICreateResource.Usage == D3D10_DDI_USAGE_DYNAMIC &&
(pResource->m_DDICreateResource.BindFlags & (D3D10_DDI_BIND_VERTEX_BUFFER | D3D10_DDI_BIND_INDEX_BUFFER)) &&
!(pResource->m_DDICreateResource.BindFlags & ~(D3D10_DDI_BIND_VERTEX_BUFFER | D3D10_DDI_BIND_INDEX_BUFFER)) &&
Subresource == 0 &&
MapType == D3D10_DDI_MAP_WRITE_NOOVERWRITE &&
MapFlags == 0 );
pResource->Map( Subresource, MapType, MapFlags, pMappedSubresource );
}
//------------------------------------------------
void APIENTRY UMDevice::DynamicIABufferMapDiscard_Default(
D3D10DDI_HDEVICE hDevice,
D3D10DDI_HRESOURCE hResource,
UINT Subresource,
D3D10_DDI_MAP MapType,
UINT MapFlags,
D3D10DDI_MAPPED_SUBRESOURCE* pMappedSubresource )
{
UMDevice* pThis = UMDevice::CastFrom( hDevice );
UMResource* pResource = UMResource::CastFrom( hResource );
assert( pResource->m_DDICreateResource.ResourceDimension == D3D10DDIRESOURCE_BUFFER &&
pResource->m_DDICreateResource.Usage == D3D10_DDI_USAGE_DYNAMIC &&
(pResource->m_DDICreateResource.BindFlags & (D3D10_DDI_BIND_VERTEX_BUFFER | D3D10_DDI_BIND_INDEX_BUFFER)) &&
!(pResource->m_DDICreateResource.BindFlags & ~(D3D10_DDI_BIND_VERTEX_BUFFER | D3D10_DDI_BIND_INDEX_BUFFER)) &&
Subresource == 0 &&
MapType == D3D10_DDI_MAP_WRITE_DISCARD &&
MapFlags == 0 );
pResource->Map( Subresource, MapType, MapFlags, pMappedSubresource );
}
//------------------------------------------------
void APIENTRY UMDevice::DynamicIABufferUnmap_Default(
D3D10DDI_HDEVICE hDevice,
D3D10DDI_HRESOURCE hResource,
UINT Subresource )
{
UMDevice* pThis = UMDevice::CastFrom( hDevice );
UMResource* pResource = UMResource::CastFrom( hResource );
assert( pResource->m_DDICreateResource.ResourceDimension == D3D10DDIRESOURCE_BUFFER &&
pResource->m_DDICreateResource.Usage == D3D10_DDI_USAGE_DYNAMIC &&
(pResource->m_DDICreateResource.BindFlags & (D3D10_DDI_BIND_VERTEX_BUFFER | D3D10_DDI_BIND_INDEX_BUFFER)) &&
!(pResource->m_DDICreateResource.BindFlags & ~(D3D10_DDI_BIND_VERTEX_BUFFER | D3D10_DDI_BIND_INDEX_BUFFER)) &&
Subresource == 0 );
pResource->Unmap( Subresource );
}
//------------------------------------------------
void APIENTRY UMDevice::DynamicConstantBufferMapDiscard_Default(
D3D10DDI_HDEVICE hDevice,
D3D10DDI_HRESOURCE hResource,
UINT Subresource,
D3D10_DDI_MAP MapType,
UINT MapFlags,
D3D10DDI_MAPPED_SUBRESOURCE* pMappedSubresource )
{
UMDevice* pThis = UMDevice::CastFrom( hDevice );
UMResource* pResource = UMResource::CastFrom( hResource );
assert( pResource->m_DDICreateResource.ResourceDimension == D3D10DDIRESOURCE_BUFFER &&
pResource->m_DDICreateResource.Usage == D3D10_DDI_USAGE_DYNAMIC &&
(pResource->m_DDICreateResource.BindFlags & D3D10_DDI_BIND_CONSTANT_BUFFER) &&
!(pResource->m_DDICreateResource.BindFlags & ~D3D10_DDI_BIND_CONSTANT_BUFFER) &&
Subresource == 0 &&
MapType == D3D10_DDI_MAP_WRITE_DISCARD &&
MapFlags == 0 );
pResource->Map( Subresource, MapType, MapFlags, pMappedSubresource );
}
//------------------------------------------------
void APIENTRY UMDevice::DynamicConstantBufferUnmap_Default(
D3D10DDI_HDEVICE hDevice,
D3D10DDI_HRESOURCE hResource,
UINT Subresource )
{
UMDevice* pThis = UMDevice::CastFrom( hDevice );
UMResource* pResource = UMResource::CastFrom( hResource );
assert( pResource->m_DDICreateResource.ResourceDimension == D3D10DDIRESOURCE_BUFFER &&
pResource->m_DDICreateResource.Usage == D3D10_DDI_USAGE_DYNAMIC &&
(pResource->m_DDICreateResource.BindFlags & D3D10_DDI_BIND_CONSTANT_BUFFER) &&
!(pResource->m_DDICreateResource.BindFlags & ~D3D10_DDI_BIND_CONSTANT_BUFFER) &&
Subresource == 0 );
pResource->Unmap( Subresource );
}
//------------------------------------------------
void APIENTRY UMDevice::DynamicResourceMapDiscard_Default(
D3D10DDI_HDEVICE hDevice,
D3D10DDI_HRESOURCE hResource,
UINT Subresource,
D3D10_DDI_MAP MapType,
UINT MapFlags,
D3D10DDI_MAPPED_SUBRESOURCE* pMappedSubresource )
{
UMDevice* pThis = UMDevice::CastFrom( hDevice );
UMResource* pResource = UMResource::CastFrom( hResource );
assert( pResource->m_DDICreateResource.Usage == D3D10_DDI_USAGE_DYNAMIC &&
pResource->m_DDICreateResource.Subresources == 1 &&
Subresource == 0 &&
MapType == D3D10_DDI_MAP_WRITE_DISCARD &&
MapFlags == 0 );
pResource->Map( Subresource, MapType, MapFlags, pMappedSubresource );
}
//------------------------------------------------
void APIENTRY UMDevice::DynamicResourceUnmap_Default(
D3D10DDI_HDEVICE hDevice,
D3D10DDI_HRESOURCE hResource,
UINT Subresource )
{
UMDevice* pThis = UMDevice::CastFrom( hDevice );
UMResource* pResource = UMResource::CastFrom( hResource );
assert( pResource->m_DDICreateResource.Usage == D3D10_DDI_USAGE_DYNAMIC &&
pResource->m_DDICreateResource.Subresources == 1 &&
Subresource == 0 );
pResource->Unmap( Subresource );
}
//------------------------------------------------
void APIENTRY UMDevice::StagingResourceMap_Default(
D3D10DDI_HDEVICE hDevice,
D3D10DDI_HRESOURCE hResource,
UINT Subresource,
D3D10_DDI_MAP MapType,
UINT MapFlags,
D3D10DDI_MAPPED_SUBRESOURCE* pMappedSubresource )
{
UMDevice* pThis = UMDevice::CastFrom( hDevice );
UMResource* pResource = UMResource::CastFrom( hResource );
assert( pResource->m_DDICreateResource.Usage == D3D10_DDI_USAGE_STAGING &&
(MapType == D3D10_DDI_MAP_READ || MapType == D3D10_DDI_MAP_WRITE || MapType == D3D10_DDI_MAP_READWRITE) );
pResource->Map( Subresource, MapType, MapFlags, pMappedSubresource );
}
//------------------------------------------------
void APIENTRY UMDevice::StagingResourceUnmap_Default(
D3D10DDI_HDEVICE hDevice,
D3D10DDI_HRESOURCE hResource,
UINT Subresource )
{
UMDevice* pThis = UMDevice::CastFrom( hDevice );
UMResource* pResource = UMResource::CastFrom( hResource );
assert( pResource->m_DDICreateResource.Usage == D3D10_DDI_USAGE_STAGING );
pResource->Unmap( Subresource );
}
//------------------------------------------------
void APIENTRY UMDevice::ResourceMap_Default(
D3D10DDI_HDEVICE hDevice,
D3D10DDI_HRESOURCE hResource,
UINT Subresource,
D3D10_DDI_MAP MapType,
UINT MapFlags,
D3D10DDI_MAPPED_SUBRESOURCE* pMappedSubresource )
{
UMDevice* pThis = UMDevice::CastFrom( hDevice );
UMResource* pResource = UMResource::CastFrom( hResource );
assert( pResource->m_DDICreateResource.Usage != D3D10_DDI_USAGE_DYNAMIC &&
pResource->m_DDICreateResource.Usage != D3D10_DDI_USAGE_STAGING );
// Generally true; but allow last second change:
assert( false );
pResource->Map( Subresource, MapType, MapFlags, pMappedSubresource );
}
//------------------------------------------------
void APIENTRY UMDevice::ResourceUnmap_Default(
D3D10DDI_HDEVICE hDevice,
D3D10DDI_HRESOURCE hResource,
UINT Subresource )
{
UMDevice* pThis = UMDevice::CastFrom( hDevice );
UMResource* pResource = UMResource::CastFrom( hResource );
assert( pResource->m_DDICreateResource.Usage != D3D10_DDI
_USAGE_DYNAMIC &&
pResource->m_DDICreateResource.Usage != D3D10_DDI_USAGE_STAGING );
// Generally true; but allow last second change:
assert( false );
pResource->Unmap( Subresource );
}
Restrictions on input values
For Windows Display Driver Model (WDDM) 1.3 and later drivers, the Microsoft Direct3D runtime supplies a restricted set of input values used by this function. For a list of all restricted values, see Direct3D rendering performance improvements.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Available in Windows Vista and later versions of the Windows operating systems. |
| Target Platform | Desktop |
| Header | d3d10umddi.h (include D3d10umddi.h) |