ddraw: Assign to structs instead of using memcpy

Andrew Talbot Andrew.Talbot at talbotville.com
Sat Feb 16 18:38:50 CST 2008

Stefan Dösinger wrote:

> Am Samstag, 16. Februar 2008 23:33:37 schrieb Andrew Talbot:
>> Here, I am assuming that the "dwSize" elements in all these cases should
>> be set to the size of the struct each is in, respectively. Please advise
>> if this assumption is wrong.
> It's not necessarily true. Sometimes there are multiple versions of the
> same structure. You can check ddraw.h and d3dtypes.h. If there is only one
> version your assumption should be true.
> If there isn't, then your assumption may still be true. In that case there
> are some tests how the Setter methods deal with newer or older
> structures(in some cases we may need more tests)

Hi Stefan,

I checked that I wasn't assigning between entities whose types had different
suffixes, such as assigning to a D3DVIEWPORT variable from one of type
D3DVIEWPORT2, for example. (In fact, the only one I had to avoid was the
assignment to a DDSURFACEDESC type variable from a DDSURFACEDESC2 one, in
ddraw/ddraw_thunks.c.) And I presume that if the underlying struct tags are
different between two similar types, then the compiler would warn of type
incompatibility if such an assignment were attempted.



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