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why the pointers in the vtable changed back?

 
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peter4d5
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PostPosted: Fri Jun 07, 2013 7:24 am    Post subject: why the pointers in the vtable changed back? Reply with quote
Hi.. DB.

From 'Injecting code and hooking to Direct3D Present()'

Quote:
db said

...hooking the vtable is of course still possible if you hook enough functions and make sure it keeps hooked (in my personal version of dxmess for example I added a rehook call right after the routines that tend to restore it).


please point me how to know that

what is "hook enough functions and make sure it keeps hooked" ?
and when "the routines that tend to restore it"?
and what method you do to 'rehook'.?

thank you.
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PostPosted: Fri Jun 07, 2013 8:06 am    Post subject: Reply with quote
I noticed that the vtable entries for some methods change on occasion (mainly get/set renderstate)
But as long as one method is still hooked you can use that to rehook the vtable. (Using the d3ddevice pointer)
Personally though, i prefer editing the assembler code instead of a vtable hook so i don't have to deal with this
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