🚀 go-pugleaf

Bertrand Lenoir-Welter wrote:
> 
> Hi all
> 
> I'm trying to integrate EMF import in a vector graphics program
> that handles its own geometric system (not just paints in a DC),
> so need to extract coordinates out of ENHMETARECORD. I'm able to
> read these coordinates directly from the record as long as it's
> EMR_MOVETOEX or EMR_LINETO types, but cannot find how to get for
> example a EMRPOLYLINE or EMRPOLYLINE18 or other structures from
> the record.
> 
> My code looks like this:
> 
> int CALLBACK EnhMetaFileProc(HDC, HANDLETABLE FAR*,
>                              ENHMETARECORD FAR *lpEMFR,
>                              int, LPARAM) {
>   switch(lpEMFR->iType) {
>     case EMR_MOVETOEX:
>       // this one's ok, coords are picked up from lpEMFR->dParm[]
>       break;
>     case EMR_LINETO:
>       // this one's ok too.
>       break;
>     case EMR_POLYLINE:
>       // How can I get coordinates then? lpEMFR->nSize gives a
>       // variable size, but lpEMFR->dParm[] are not coordinates.
>       // How can I access EMRPOLYLINE structure from here?
>       break;
>     case EMR_POLYLINE16:
>     case EMR_POLYGON:
>       // etc. Same question...
>       break;
>   }
> }
> 
> Note that I have no use of any DC since I just want to load
> vector info and convert it to my own data format.
> 
> Thanks for any help.
> 
> --
> Remove the "stuff" from my address for direct mail

This comes from the Win16 online help (I couldn't locate the equivalent
for Win32).

+++++++++++++++++++++++++

Polyline Metafile Record 

struct {
    DWORD rdSize;
    WORD  rdFunction;
    WORD  rdParm[];
}

Member	Description

rdSize		Specifies the record size, in words. 
rdFunction	Specifies the GDI function number 0x0325. 
rdParm		Contains the following elements: 

	Element		Description

	count		Number of points 
	list of points	List of individual points 

++++++++++++++++

IOW, lpEMFR->dParm[0] gives you the number of points, and successive
pairs of elements of the array give you the  individual coordinates.

The entry for the polygon record type was essentially the same. I would
presume that EMR_POLYLINE16 is the same, except that individual elements
in the array rdParm are 16 bits in size rather than 32 bits.

Paul