Hi, Hallvar Helleseth <[EMAIL PROTECTED]> writes:
> I've been thinking about a new way of using StretchBlit. > I think StretchBlit could be used to stretch a surface in atleast four > ways: > 1. Tileing the source surface to fit the destination surface > (remove the TileBlit function) > 2. Scaling up/down the source surface while keeping borders > (think of Imlib2) > 3. Tileing the source surface while keeping borders. > 4. Just scale up/down, like it does today. > > A way of doing this could be to add: > DSBLIT_TILE, DSBLIT_BORDER, DSBLIT_BORDER_TILE to DFBSurfaceBlittingFlags. > > In IDirectFBSurface_StretchBlit() (display/idirectfbsurface.c) you could > check for the blit flags and call the appropriate > dfb_gfxcard_stretchblit(), dfb_gfxcard_tileblit(), or > dfb_gfxcard_borderblit() > > For a surface to know where the border is I think we need a new API call: > surface->SetBorder(surface, left, right, top, bottom) > which would alter the (struct _CoreSurface).left_border/right_border/etc > Perhaps also the ability to specify the border upon surface creation? > > The reason I want all these four functions in StretchBlit is because > they all stretch blit (part of) a source surface to (part of) a > desitination surface, just in four different ways... > > Or maybe you'd like the four functions to have their own API call ? > (I really want the border blit function, which I've already > implemented at the application level, but it's much nicer to have in the > library since it's such a usefull function!) > > Anyways if you give me thumbs up I'll be happy to implement it myself as > good as I can, and send patches. IMO this feature belongs into the application level. It's rarely useful and can easily be implemented outside of DirectFB if it is needed. If you think it could be useful for other apps too, why don't you put it into a utility library so the functionality can be shared without bloating the DirectFB API? Please keep in mind that we care a lot about the size of the DirectFB library since our main target is embedded devices. Salut, Sven -- Info: To unsubscribe send a mail to [EMAIL PROTECTED] with "unsubscribe directfb-dev" as subject.
