<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML xmlns="http://www.w3.org/TR/REC-html40" xmlns:o =
"urn:schemas-microsoft-com:office:office" xmlns:w =
"urn:schemas-microsoft-com:office:word" xmlns:st1 =
"urn:schemas-microsoft-com:office:smarttags"><HEAD>
<META http-equiv=Content-Type content="text/html; charset=us-ascii">
<META content="MSHTML 6.00.2900.2873" name=GENERATOR><o:SmartTagType name="City"
namespaceuri="urn:schemas-microsoft-com:office:smarttags"></o:SmartTagType><o:SmartTagType
name="place"
namespaceuri="urn:schemas-microsoft-com:office:smarttags"></o:SmartTagType><!--[if !mso]>
<STYLE>st1\:* {
BEHAVIOR: url(#default#ieooui)
}
</STYLE>
<![endif]-->
<STYLE>@page Section1 {size: 595.3pt 841.9pt; margin: 72.0pt 90.0pt 72.0pt 90.0pt; }
P.MsoNormal {
FONT-SIZE: 12pt; MARGIN: 0cm 0cm 0pt; FONT-FAMILY: "Times New Roman"
}
LI.MsoNormal {
FONT-SIZE: 12pt; MARGIN: 0cm 0cm 0pt; FONT-FAMILY: "Times New Roman"
}
DIV.MsoNormal {
FONT-SIZE: 12pt; MARGIN: 0cm 0cm 0pt; FONT-FAMILY: "Times New Roman"
}
A:link {
COLOR: blue; TEXT-DECORATION: underline
}
SPAN.MsoHyperlink {
COLOR: blue; TEXT-DECORATION: underline
}
A:visited {
COLOR: purple; TEXT-DECORATION: underline
}
SPAN.MsoHyperlinkFollowed {
COLOR: purple; TEXT-DECORATION: underline
}
SPAN.EmailStyle17 {
COLOR: windowtext; FONT-FAMILY: Arial; mso-style-type: personal-compose
}
DIV.Section1 {
page: Section1
}
</STYLE>
</HEAD>
<BODY lang=EN-AU vLink=purple link=blue>
<DIV dir=ltr align=left><SPAN class=830132623-05062006><FONT face=Arial
color=#0000ff size=2>Hi Vaughan,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=830132623-05062006><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=830132623-05062006><FONT face=Arial
color=#0000ff size=2>I have run into PNG24 problems on-and-off, but I'm not sure
what causes it. I normally use GIF for transparent layers, so I have never
really looked into it a lot. </FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=830132623-05062006><FONT face=Arial
color=#0000ff size=2>The "hack" that makes the PNG24 work in IE is applied in an
unusual way, by means of javascript getting invoked by CSS. I am not entirely
certain what triggers the function at what time during loading. I suspect the
problem with black tiles may be because the hack is applied before the image is
loaded. Maybe if IE doesn't have pixel information yet, it defaults to black.
</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=830132623-05062006><FONT face=Arial
color=#0000ff size=2></FONT></SPAN><SPAN class=830132623-05062006><FONT
face=Arial color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=830132623-05062006><FONT face=Arial
color=#0000ff size=2>I suppose you could experiment with triggering the
applyPNGFilter function for all tiles at times when the black images tend to
occur, to see what happens. Though I think that might cause some
overhead...</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=830132623-05062006><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=830132623-05062006><FONT face=Arial
color=#0000ff size=2>Sorry not to be more helpful.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=830132623-05062006><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=830132623-05062006><FONT face=Arial
color=#0000ff size=2>regards,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=830132623-05062006><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=830132623-05062006><FONT face=Arial
color=#0000ff size=2>Jacob</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=830132623-05062006><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=830132623-05062006><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV><BR>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> Vaughan Rowsell
[mailto:vaughan@vianetinternational.com] <BR><B>Sent:</B> 2 June 2006
20:39<BR><B>To:</B> Delfos, Jacob<BR><B>Subject:</B> Black transparencies with
ka-map in IE<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Hi
Jacob,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">I have been reading some posts on the ka-map user
groups regarding alpha transparencies and black tile/screens in IE. I am
having the same issues with the latest ka-map from CVS. While tiles with
alpha (png24) are loading the viewport tiles go black and each tile
flashes. Once the tiles have finished loading the screen looks normal
and the transparencies are in effect. Sometimes the screen stays black.
Is this the same problem you were having? If so how did you resolve it?
I can not seep to find a posting with the
resolution.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">Best regards,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><st1:City w:st="on"><st1:place w:st="on"><FONT
face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">Vaughan</SPAN></FONT></st1:place></st1:City>
Rowsell<o:p></o:p></P></DIV></BLOCKQUOTE></BODY></HTML>