| Title: | DECWINDOWS 26-JAN-89 to 29-NOV-90 |
| Notice: | See 1639.0 for VMS V5.3 kit; 2043.0 for 5.4 IFT kit |
| Moderator: | STAR::VATNE |
| Created: | Mon Oct 30 1989 |
| Last Modified: | Mon Dec 31 1990 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 3726 |
| Total number of notes: | 19516 |
Is there any way to create a *temporary* clipping rectangle that applies
to all drawing operations? I can't find anything that does, and I'm
trying to make sure I didn't miss something.
- Regions must be applied to GC's (or that's what the documentation
implies).
- Clipping is GC based.
- Creating a subwindow doesn't help because this must also work when
drawing to a PIXMAP as well as a window.
I'm looking to find a way to optimize the screen output from a display
list edit operation. The simplest way is to erase the bounding extents
of the changed area, clip output to that area and redraw all objects
that have extents which intersect the area... but so far, it looks
like each object to be drawn will need to have it's clipping region
intersected with the area and this new area set as the clipping region
and then reset after the drawing is completed... yuk.
Any ideas?
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 2855.1 | DECWIN::FISHER | Prune Juice: A Warrior's Drink! | Fri Jun 01 1990 16:03 | 5 | |
How about if you (something like) got the big clip region and made a bitmap out of it (with 1s inside). Then set this as a stipple mask. It would not work with all operations (like tiles), but would it help? Burns | |||||
| 2855.2 | STAR::KLEINSORGE | Fred Kleinsorge, VMS Development | Fri Jun 01 1990 17:38 | 8 | |
Not really. It's for a library (UISX) which uses stipple fill quite
extensively. It would also make for even more special-case code.
I was just suprised to find that there was no way to set a clip list
for a drawable as opposed to a GC.
_Fred
| |||||