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- Description
The TDx_Draw::StartModeTest method will update the refresh rate information in the system registry by testing the current display adapter / EDID monitor combination.
Once the testable resolutions are defined using this method, TDx_Draw::EvaluateMode() can be used to test each resolution for the maximum refresh rate that can be displayed.
The changed registry settings may change the results returned by TDx_Draw::EnumDisplayModes() when it is called with DDEDM_REFRESHRATES set.
No testing and a return value of DDERR_TESTFINISHED will result if the monitor being tested is not EDID compliant.
No modes will be tested if the EDID table does not contain values higher than 60 Hz and refresh rates higher than 100 Hz will only be tested if the EDID table contains values higher than 85 Hz.
Set the parameters to NULL, 0 and 0 to clear existing refresh rate information from the registry.
If the method call fails, the OnError event will be triggered with one of the following values:
DDERR_CURRENTLYNOTAVAIL
DDERR_INVALIDOBJECT
DDERR_INVALIDPARAMS
DDERR_NOEXCLUSIVEMODE
DDERR_NOTFOUND
DDERR_TESTFINISHED
Calling this method with DDSMT_ISTESTREQUIRED set may return one of these values:
DDERR_NEWMODE
DDERR_NODRIVERSUPPORT
DDERR_NOMONITORINFORMATION
DDERR_TESTFINISHED
- Parameters
ModesToTest
The ModesToTest parameter references an array of SIZE elements defining the screen resolutions to be tested.
NumEntries
The NumEntries parameter defines how many elements the array referenced by the ModesToTest parameter contains.
Flags
The Flags parameter defines a flag indicating whether a test should be initiated.
The described effect applies when the flag is set.
-
DDSMT_ISTESTREQUIRED
The method will return a value indicating whether it is neccessary (or possible) to test the resolutions referenced by the ModesToTest parameter, without initiating any tests.
- See Also
- Top
TDx_Draw_Library v2.00 Component Reference
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[ TDx_Draw::StartModeTest() ] [ next: TestCooperativeLevel() ] [ prev: SetDisplayMode() ] public:
virtual HRESULT __fastcall StartModeTest( SIZE* pModesToTest, dword pNumEntries, dword pFlags );
TDX_DRAW::STARTMODETEST()
[ component method ]
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