Intel HD Graphics DirectX Developer's Guide (Sandy Bridge)

Intel® HD Graphics DirectX* Developer's Guide
2. Query if the GPU adapter has changed using the Windows API‟s
EnumDisplaySettings() or EnumDisplayDevices().
3. If yes, then save off the current context including state and draw information in
the application and then:
a. Recreate the Microsoft DirectX* device.
b. Restore the context.
c. Continue rendering from the last scene rendered before the
WM_DISPLAYCHANGE message occurred.
3.10 Some suggestions, tips & tricks from
the field
The items in this section are based on the observations of Intel engineers with code
from developers with different levels of experiences. These are collected here as a
checklist for reference for developers. Some of the items are generic to all graphics
platforms.
3.10.1 Device Capabilities
Intel® microarchitecture code name Sandy Bridge supports DirectX* functionality up
to and including full D3D10.1 support.
If you encounter a Direct3D feature that does not work on the latest drivers on this
device, please contact your Intel Account Manager. Intel will investigate these issues
for future drivers and should be able to suggest workarounds.
3.10.2 DirectX* 9 Extensions
Several hardware vendors support their own extensions to the DX9 specifications
through specific texture formats and render paths that are not part of Microsoft's
official DX9 specifications.
To ensure maximum compatibility with these extensions, Intel now supports many of
those extensions. A list of those, current as of the release of this Guide, is given in
section 3.6 Advanced DirectX* 9 Capabilities (page 22).
If there are additional extensions that you believe are useful, (or have OpenGL*
extensions that you require), please let your Intel Account Manager know.
3.10.3 Available Device Graphics Memory
Applications often check for the amount of local memory available (which is a valid
metric for discrete cards) using DirectX* 7 DirectDraw call GetAvailableVidMem(...) or
DX9's GetAvailableTextureMem(...) calls. These return misleading results for Intel®
HD Graphics platforms (first call returns 64 MB and the second call returns zero) and
32 Document Number: 321371-002US