We are trying to solve it by splitting the large SVG in 2 parts; one static part and one dynamic part. We layer the dynamic part on top of the static part so the updates will be done on small SVG.
Has anyone tried this before; suggestions are welcome:-) Frederik -----Original Message----- From: Lukasz Matuszczak [mailto:[EMAIL PROTECTED] Sent: Wednesday, June 22, 2005 7:29 AM To: [email protected] Subject: Re: Optimize SVG for dynamic update ----- Original Message ----- From: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, June 21, 2005 1:20 PM Subject: Optimize SVG for dynamic update > Hello, > > We're building an application that updates an large SVG (< 8MB) every 2 > seconds. The SVG contains a lot of static parts that makes the update process > considerably heavier. > > Are there ways to optimize the SVG (structure, layers, ...) so that the > updates take less CPU. > > We use batik 1.5.1 on Windows 2000/XP. Updates are done via java > (RunnableQueue) > I have the similar problem (although my documents are 10 times smaller :)). I received an answer from Thomas that what I really need is 'static' CSS hint from SVG 1.2. look here: http://koala.ilog.fr/batik/mlists/batik-users/archives/msg06866.html It is not implemented in Batik so far. I have tried also some workaround solution which puts several JSVGCanvas-es, one above another. Static parts of document are presented in a one JSVGCanvas, which is in the background and dynamic ones are put in JSVGCanvases with transparent background. This solution gives you a big performance boost, because static parts of document are rendered to an offscreen buffer only once. There are however some complications, because it is important to set <svg> viewbox, x, y, width, height attributes of top transparent layers properly, if we want them to be a little smaller than bottom JSVGCanvas (each JSVGCanvas holds offscreen buffer in memory, which can be big). Moreover if we want to cut some fragment from the original document and put it in another JSVGCanvas, we have to care about copy all CSS, fonts, symbols, gradients definitions. Regards, Lukasz Matuszczak --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.859 / Virus Database: 585 - Release Date: 2/14/2005 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.859 / Virus Database: 585 - Release Date: 2/14/2005 --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
