| 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 |
Hello, is it possible to synchronize some xlib- or xtoolkit-calls to the vsync- Signal, without writing your own device driver? My customer wants to show pictures on a VS3520 in a quick order, like a film. He is satisfied by the speed, but the problem is that sometimes XCopyArea is called during drawing the old picture. That means the upper half is old and the lower half is new. Therefore he would like to call the XcopyArea at Vsynctime. Is there a way to do so? I have read a little within the decwindows devicedriver manual and in my opinion vsync is only an entrypoint within the driver so you have to write your own to do something at that time. Am I right? Thanks for your help. Susanne K�ster, DSC Munich
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 2875.1 | Try a StoreColor to a visible and installed colormap. | DECWIN::FISHER | Prune Juice: A Warrior's Drink! | Wed Jun 06 1990 13:36 | 7 |
There is no "official" way. However, you might try doing a StoreColor just before the CopyArea. (If this is a 24-plane system, you'll have to create a pseudo-color window and colormap, install the colormap, and store into that one, since the default colormap can't be stored into.) StoreColor waits till a vsync on GPXs, although I'm not sure about the 3520/3540. Burns | |||||