Hum, just found that http://www.quirksmode.org/bugreports/archives/2007/02/Cant_have_both_PNG32_and_alphaopacity_in_IE7.html
It seems like it is exactly linked to your problem. Regards, Pierre On Fri, Jul 18, 2008 at 11:34 AM, Guillaume Sueur <[EMAIL PROTECTED]> wrote: > Hi Pierre, > > Here are two print screen : > agg_opacity_1.png : the layer as seen in IE7 with no transparency : perfect. > agg_opacity_0_5.png : the layer as seen in IE7 with 50 % transparency : > ugly. > > Note that the style of the layer hasn't got any background. > > Guillaume > > Pierre GIRAUD a écrit : >> >> Is your image displayed correctly by IE7 if you try to show it alone >> in your browser (with a background color) ? >> Can you send us a example of generated image ? And a screenshot of the >> unexpected behavior ? >> >> Regards, >> Pierre >> >> >> On Fri, Jul 18, 2008 at 9:45 AM, Guillaume Sueur >> <[EMAIL PROTECTED]> wrote: >>> >>> Kenneth Skovhede, GEOGRAF A/S a écrit : >>>> >>>> I have seen this as well. It happens whenever you set the "alpha" value >>>> in IE7. >>>> It even happens if the value is set to 1.0, but a fix in OpenLayers 2.6 >>>> removes >>>> the "alpha" value if the opacity value is greater than 1.0. >>>> (OpenLayers.Util.modifyDOMElement line 191). >>>> >>>> I'm fairly sure its an IE bug. >>> >>> So am I ! Just wanted to kown if a kind of workaround was possible. >>> >>> Guillaume >>> >>> >>>> Regards, Kenneth Skovhede, GEOGRAF A/S >>>> >>>> >>>> >>>> Guillaume Sueur skrev: >>>>> >>>>> no, mapserver, but it's a typical client problem. >>>>> when the polygon is filled, it looks quite ok, because only the outline >>>>> border is wrong, but with lines and labels, whaouh, so crap ! >>>>> when opacity is 1 or format is standard PNG, the problem doesn't show >>>>> up. >>>>> >>>>> Guillaume >>>>> >>>>> Zac Spitzer a écrit : >>>>> >>>>>> was this using mapguide? I have seen similiar problems >>>>>> >>>>>> On Fri, Jul 18, 2008 at 12:11 AM, Guillaume Sueur >>>>>> <[EMAIL PROTECTED]> wrote: >>>>>> >>>>>>> Hi devs, >>>>>>> >>>>>>> When displaying a WMS layer (AGG image) with some transparency on >>>>>>> IE7, >>>>>>> it shows ugly grey pixels surrounding the borders. I guess it comes >>>>>>> from >>>>>>> a mishandling of the antialiased pixels from AGG. Any trick to hold >>>>>>> that ? >>>>>>> >>>>>>> Thanks >>>>>>> >>>>>>> Guillaume >>> >>> _______________________________________________ >>> Dev mailing list >>> [email protected] >>> http://openlayers.org/mailman/listinfo/dev >>> >> > > > _______________________________________________ Dev mailing list [email protected] http://openlayers.org/mailman/listinfo/dev
