Hey Chris,<br><br>Thanks for the guess, setting transparent to 0
doesn't get rid of the issue, just makes the background default to
white with full opacity.<br><br>I found the issue, I was setting
PROCESSING=BILINEAR which apparently doesn't work well with partially
transparent pixels. Going back to nearest seems to work fine.<br>
<br>Thanks!<br><br>Jason<br><br><div class="gmail_quote">On Wed, Sep 16, 2009 at 7:20 PM, Chris Hodgson <span dir="ltr"><<a href="mailto:chodgson@refractions.net">chodgson@refractions.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Just a guess but have you tried with transparent = 0? Just wondering if the transparent mode rendering is somehow overriding the RGBA alpha mode rendering?<br>
<br>
Chris<br>
<br>
Jason Beverage wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="im">
Hi all,<br>
<br>
I'm serving up some raster imagery with an alpha band that contains partially transparent pixels using mapscript but when the image is rendered, the partially transparent portions (alpha between 5 and 10) come through completely opaque (alpha of 255). Areas that are fully opaque or fully transparent look fine. <br>
I'm using an output format with the GD/PNG renderer with a RGBA image mode and "transparent" set to true. I've tried using the AGG/PNG and GDAL/PNG renderers with the same result.<br>
<br>
C# code for the output format:<br>
</div><a href="http://map.outputformat.name" target="_blank">map.outputformat.name</a> <<a href="http://map.outputformat.name" target="_blank">http://map.outputformat.name</a>> = "PNG";<div class="im"><br>
map.outputformat.driver = "GD/PNG";<br>
map.outputformat.mimetype = "image/png";<br>
map.outputformat.imagemode = (int)MS_IMAGEMODE.MS_IMAGEMODE_RGBA;<br>
map.outputformat.extension = "png";<br>
map.outputformat.transparent = 1;<br>
<br>
Any ideas on what I'm doing wrong?<br>
<br>
Thanks,<br>
<br>
Jason<br></div>
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