Bug 74003

Created attachment 118216 [details] Screenshot showing ugly kerning after text rendered when transformed to be zoomed out is then zoomed in When a transform is applied to text elements within SVG, it seems the kerning details (gaps between individual characters) are simply scaled up or down according to the (pixel/sub-pixel) rounded values determined when the text was first rendered - this leads to very ugly results at times, and can only be fixed by resetting the text content of the spans which forces a re-calculation of the character spacing. To see a particularly ugly case, see test case number 2 at the test page above and use the button to zoom out seven or eight times (or more), then use the 'recreate spans' button to re-render the (illegibly small) text, and then reset zoom and you'll see the now legible text is badly laid out until you recreate spans again - see screenshot attachment. Some other browsers suffer slightly from this (Firefox 4,5 and 6) but nowhere near as badly - they'll typically have just one or two character gaps out by just one pixel. Bug report also post to chrome as http://code.google.com/p/chromium/issues/detail?id=98392 but advised to post here instead (ie underlying webkit issue) as it occurs in both Chrome and Safari.