[NTG-context] texsync'd linux ConTeXt png error

Hans Hagen pragma at wxs.nl
Wed Jun 8 09:34:18 CEST 2005


Stuart Jansen wrote:
> I'm using the latest texsync'd version of ConTeXt on 32bit and 64bit
> linux. Looks like either ConTeXt or pdfetex can't handle PNG's with an
> alpha channel.
> 
> PNG image data, 8-bit/color RGB, non-interlaced  <-- works fine
> PNG image data, 8-bit/color RGBA, non-interlaced <-- corrupt pdf
> PNG image data, 8-bit gray+alpha, non-interlaced <-- following error:
> ---
> libpng warning: Ignoring bad adaptive filter type
> libpng warning: Ignoring bad adaptive filter type
> libpng warning: Ignoring bad adaptive filter type
> ---
> repeated ad nauseum
> 
> (To benefit anyone coming across this message in the archives:)
> As a work around, assuming you don't need the alpha, the image can be
> converted to RGB in The Gimp using Layers > Flatten Image.
> Alternatively, using Image Magick, the command would be
> convert image.png png24:image-new.png

i will update the binaries soon, there has been some fixes and extensions to 
pdftex and there will be a new release

Hans


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