I tried adding in a 'cairo_scale', which works. It does seem to slow things
down a little, but not horribly. That is, it's pretty slow to begin with,
when the overlay is on, so it doesn't make it much worse.
My big problem is I can't figure out how to find the right scale. I can
hard-code numbers, but that will only work with my particular model.
cairo_t *cr = cairo_create(priv->pixmap);
while (tmp) {
image = ENTANGLE_IMAGE(tmp->data);
pixbuf = entangle_image_get_pixbuf(image);
gdk_cairo_set_source_pixbuf(cr, pixbuf, 0, 0);
if (tmp == priv->images) {
cairo_scale(cr,5,5);
cairo_paint(cr);
} else {
cairo_paint_with_alpha(cr, 0.5); }
tmp = tmp->next;
}
cairo_destroy(cr);
On Sun, Feb 17, 2013 at 4:59 AM, Daniel P. Berrange <d...@berrange.com>wrote:
> On Sat, Feb 16, 2013 at 11:43:44AM -0600, Paul Archer wrote:
> > First, I want to say thanks, Daniel, for writing this, and for adding the
> > onion skin/overlay images option.
> >
> > Unfortunately, there seems to be a bug with the overlay. I don't know if
> > it's just with my particular setup, though. I've tried both compiling
> from
> > source, and getting the package from getdeb (now that it's back up). I'm
> on
> > Ubuntu 12.04 amd64, with a Canon 50D.
> > Anyway, the problem is that as soon as I go into live preview mode with
> the
> > overlay option on, the preview window shows the prior shots, with the
> live
> > view shrunk down to about 1/8 the window size and stuck in the upper left
> > corner.
>
> Doh, I know what is happening - the live view images are much smaller
> resolution than the actual captured images. We're drawing them at the
> same scaling factor, so the live view looks tiny by comparison. We need
> to apply different scaling factors to each image, so that they all end
> up rendered at the same size on screen.
>
> > Anyway, hope it's an easy fix. I'm not sure where to look in the code,
> but
> > if you point me in the right direction, I can at least give it a try.
>
> It'll be in src/frontend/entangle-image-display.c file in the method
> do_entangle_image_display_render_pixmap(). Not sure how easy it will
> be for you to fix though, because I fear there will be some performance
> issues with scaling during live view, due to the frequent refreshes.
>
>
> Daniel
> --
> |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/:|
> |: http://libvirt.org -o- http://virt-manager.org:|
> |: http://autobuild.org -o- http://search.cpan.org/~danberr/:|
> |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc:|
>
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