[cairo] Rendering to Windows Metafile with Cairo

[Kozhevnikov Mikhail]

Hi Dominic,

Thanks for your help!
Switching to win32 printing surface helps.

The only remaining issue is that text is missing in the resulting metafile. 
Haven't you got any ideas about the reason for that?

Thanks in advance,
Mikhail.

25.11.08, 20:32, "Dominic Lachowicz" <domlachowicz at gmail.com>:

> GTK+ on Windows uses EMFs for its Print Preview functionality. You can
> have a look @ http://svn.gnome.org/viewvc/gtk%2B/trunk/gtk/gtkprintoperation-win32.c?view=markup.
> Some notable differences:
> 1) It uses a Win32 printing surface instead of a normal win32 surface
> 2) It calls CloseEnhMetaFile() after surface_destroy(). It also
> deletes the metafile.
> 3) It calls StartPage/EndPage and uses cairo_surface_show_page
> Hope this helps somewhat,
> Dom
> On Tue, Nov 25, 2008 at 11:47 AM, Kozhevnikov Mikhail
> <mikhailkozhevnikov at yandex.ru> wrote:
> > Hi All,
> >
> > I tried rendering smth to enhanced windows metafile. The result looks strange.
> > Two files attached are results of rendering the code:
> >
> > void TestCairoEMF (bool emf)
> > {
> >   HDC hdc;
> >
> >   cairo_surface_t *surface;
> >   cairo_t *cr;
> >
> >   if (emf)
> >   {
> >      hdc = CreateEnhMetaFile(NULL, "test.emf", NULL, NULL);
> >      surface = cairo_win32_surface_create(hdc);
> >   }
> >   else
> >      surface = cairo_pdf_surface_create("test.pdf", 100, 30);
> >   cr = cairo_create (surface);
> >   cairo_select_font_face (cr, "Sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
> >
> >   cairo_move_to(cr, 5, 5);
> >   cairo_line_to(cr, 30, 25);
> >   cairo_line_to(cr, 50, 10);
> >   cairo_line_to(cr, 80, 20);
> >   cairo_set_source_rgb(cr, 0, 0, 1);
> >   cairo_stroke(cr);
> >
> >   cairo_move_to(cr, 15, 15);
> >   cairo_set_font_size(cr, 15);
> >   cairo_set_source_rgb(cr, 0, 0, 0);
> >   cairo_show_text(cr, "hello world");
> >   if (emf)
> >      CloseEnhMetaFile(hdc);
> >   cairo_destroy (cr);
> >   cairo_surface_destroy (surface);
> > }
> >
> >
> > However, if I use regular win32 DC, it works fine.
> >
> > Am I doing smth wrong?
> > Or Windows metafile rendering is not supported at all?
> >
> > Thanks in advance,
> > Mikhail.
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> > cairo at cairographics.org
> > http://lists.cairographics.org/mailman/listinfo/cairo
> >
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