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32 lines
1.3 KiB
Text
32 lines
1.3 KiB
Text
DdCreateDirectDrawObject
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When IN HDC is not NULL
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1. we need check the IN HDC is NULL or not
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2. if it not null we need create a directdraw handler
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and store it to pDirectDrawGlobal->hDD
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3. if the directdraw handle is null return false
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we did fail to create directdraw HAL
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4. if the directdraw handle was not null we return true
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we did susses to create directdraw HAL
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When IN HDC is NULL
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Now we come to if IN HDC is null basic we need create
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a hdc and cashe some data
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1. if internal cache of directdraw handle is not null (pDirectDrawGlobalInternal->hDD)
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we take it and fill to the public directdraw handler (pDirectDrawGlobal->hDD)
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and return susses.
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2. if no internal cache of directdraw handle is found we need create it
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by using CreateDC for tempary HDC that will be cache in the win32k later
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3. we need check see if we got a tempary HDC or not, if we fail getting tempary
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HDC return FALSE
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4. Now we trying create directdraw handler it being cache to (pDirectDrawGlobalInternal->hDD)
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and it also set same handler to the public (pDirectDrawGlobal->hDD)
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5. if it fails to create directdraw handle return false
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we did fail to create directdraw HAL
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6. if it susses create directdraw handle return true
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we did susses to create directdraw HAL
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To create a directdraw handler you need call the NtGdiDdCreateDirectDrawObject with a hdc
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