Re: usage of gdk_pixbuf_scale_simple ?

["Paul Bournival Jr." <paulb foobox com>]

> From a parallel universe, Havoc Pennington <hp redhat com> scrawled.....
>
> > at this point, workbuf is completely black.
> > I know that the results aren't really going to be correct unless rowstride
> > is 0, in which case it is here. but I'd at least expect to see *something*
> > no matter what.
> That's just it, rowstride shouldn't be 0. Rowstride is the distance
> between the start of each row in the image. So it will always be
> greater than or equal to the width. It's separate from width because
> you may have padding at the ends of rows.

oh! I thought it was a small buffer at the end of the row, not including
the row data..

okay; so gdk_pixbuf_new_from_data doesn't compute an optimal rowstride;
I guess this could be construed as a bug.

so I'll use gdk_pixbuf_new, which the documentation says does compute
a proper rowstride. I'll copy the data in manually instead of
relying on new_from_data. I tried it; the rowstrides are fine now. 
here's what I'm doing now:

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
        srcpix=gdk_pixbuf_new(GDK_COLORSPACE_RGB,FALSE,BITSPERSAMPLE/3,
            inh->width, inh->height);
        pixels=gdk_pixbuf_get_pixels(srcpix);
        memcpy(pixels,workbuf,(inh->width*BITSPERSAMPLE/8)*inh->height);
        destpix=gdk_pixbuf_scale_simple(srcpix, 352,240,GDK_INTERP_NEAREST);
        pixels=gdk_pixbuf_get_pixels(destpix);
        memcpy(workbuf,pixels,(352*BITSPERSAMPLE/8)*240);
        gdk_pixbuf_unref(destpix);
        gdk_pixbuf_unref(srcpix);
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


I still get the same thing; black image. I do note that the rowstride
for both images is fine; something like 2160 for src and 1000 for dest.
Is there anything else I might be missing?

thanks!

-paulb

===========================================================================
paulb oasis-software com         "I'm fuzzy on this whole good/bad thing" 
paulb foobox com                                          -Dr. Peter Venkman