texsync'd linux ConTeXt png error

texsync'd linux ConTeXt png error

[Stuart Jansen]

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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

-- 
Stuart Jansen <sjansen@gurulabs.com>
Guru Labs, L.C.

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Re: texsync'd linux ConTeXt png error

[Taco Hoekwater]

Sounds like a bug in pdftex. What does texexec -- version
report? (There is a known bug with pdtex 1.20a, I think)

Taco

Stuart Jansen wrote:
> ---
> libpng warning: Ignoring bad adaptive filter type
> libpng warning: Ignoring bad adaptive filter type
> libpng warning: Ignoring bad adaptive filter type
> ---

Re: texsync'd linux ConTeXt png error

[Stuart Jansen]

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On Tue, 2005-06-07 at 23:39 +0200, Taco Hoekwater wrote:
> Sounds like a bug in pdftex. What does texexec -- version
> report? (There is a known bug with pdtex 1.20a, I think)

 TeXExec 5.2.5 - ConTeXt / PRAGMA ADE 1997-2005

               texexec : TeXExec 5.2.5 - ConTeXt / PRAGMA ADE 1997-2005
               texutil : TeXUtil 9.0.0 - ConTeXt / PRAGMA ADE 1992-2004
                   tex : pdfeTeX, 3.141592-1.20a-2.2 (Web2C 7.5.3)
               context : ver: 2005.03.16
               cont-en : ver: 2005.03.16  fmt: 2005.6.7  mes: english
               cont-cz : ver: 2005.03.16  fmt: 2005.5.28  mes: czech
               cont-de : ver: 2005.03.16  fmt: 2005.5.28  mes: german
               cont-it : ver: 2005.03.16  fmt: 2005.5.28  mes: italian
               cont-nl : ver: 2005.03.16  fmt: 2005.6.7  mes: dutch
               cont-ro : ver: 2005.03.16  fmt: 2005.5.28  mes: romanian

-- 
Stuart Jansen <sjansen@gurulabs.com>
Guru Labs, L.C.

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Re: texsync'd linux ConTeXt png error

[Taco Hoekwater]

Stuart Jansen wrote:

>                    tex : pdfeTeX, 3.141592-1.20a-2.2 (Web2C 7.5.3)

You have to update pdfeTeX. Did it come from one of the archives
at Pragma?

Taco

Re: texsync'd linux ConTeXt png error

[Hans Hagen]

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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