Am 23.12.2010 08:01, schrieb Yan Peng Guo:
HI~ Not sure which group should I send the mail to, so I send to DEV and FEATURE both. May I know is there any further plan of drawinglayer module enhancement? It is very exciting to see there are many improvements in the module in OO3.3. But I still found for some ODPs which containing complex meta files, the performance is a bit slow, although already get great improvement comparing with OO3.1. I know there are many issues checked in for meta files in drawinglayer from OO3.x. May I know is the improvement finished? Is this module still improving now or will be in the future? If so, what is the focused area and when will the work get to ready?
Changes with Metafile format are never finished due to the grown nature of those, but the most urgent is done. Changing more is risky and a compatibility issue with older offices (since metafiles are streamed and noone can change the code of released offices which stream in metafiles).
All in all the Drawinglayer (Model, View and Controller, UNO API, ...) goes through slow but steady improvements which are the prerequisite for further enhancements (e.g. double precision stuff, new interactions, ...).
It goes slow since we cannot simply write a new drawinglayer, noone would be able to adapt the 11 users of it (not only the three big OOo apps which use the drawinglayer pretty hard-coded, but many smaller modules, too). Thus it has to be migrated from a situation where not even model/view/controller was separated to a more modern, modularized state.
The visualisation part (view) is refactored since 3.1 (using primtives), working and stable. No showstoppers in this area at all for the last release. Antialiasing is one of the results, but also this brought some problems in areas where no big changes are possible and/or connections to old, non-removable parts is needed, e.g. metafiles. Sigh.
Be ensured that we are working steadily on this. The next step is to change the drawinglayer core to double precision (currently it's still using 32-bit integer) and to homogen transformations (don't ask what it is using currently :-)).
HTH for the moment, Regards AW
Thanks and Best Regards, Clarence
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