Re: [Gimp-user] strange PNG from Adobe Fireworks

2008-10-20 Thread Eric P
Sven Neumann wrote:
> Hi,
> 
> On Fri, 2008-10-17 at 21:26 -0500, Eric P wrote:
>> Check out this png.  I'm not sure if it is editable in the GIMP.
>> http://i34.tinypic.com/rtzshs.png
>>
>> First of all it's an indexed image.  You'll see two white arrows on the 
>> right hand side.  Switch the mode to RGB and
>> you'll see two new alpha transparent arrows appear on the left hand side (!?)
>>
>> Checking the header of the image I see Adobe Fireworks in there.  Any ideas 
>> what this anomaly of a png is?
> 
> rtzshs.png...
>   Image Width: 20 Image Length: 110
>   Bitdepth (Bits/Sample): 2
>   Channels (Samples/Pixel): 1
>   Pixel depth (Pixel Depth): 2
>   Colour Type (Photometric Interpretation):
> PALETTED COLOUR with alpha (3 colours, 3 transparent) 
>   Image filter: Single row per byte filter 
>   Interlacing: No interlacing 
>   Compression Scheme: Deflate method 8, 32k window
>   Resolution: 2834, 2834 (pixels per meter)
>   FillOrder: msb-to-lsb
>   Byte Order: Network (Big Endian)
>   Number of text strings: 1 of 9
> Software (xTXt deflate compressed): Adobe Fireworks CS3
>   Offsets: 0, 0
> 
> This image uses an indexed palette with transparency information. This
> is not fully supported in GIMP. The PNG loader seems to handle it
> nicely, but the GIMP image display has some special code that thresholds
> the alpha channel for images in indexed mode. This is because the code
> was written for GIF images. The projection in indexed mode simulates the
> alpha capabilities of the GIF format, where a pixel is either fully
> transparent or opaque.
> 
> 
> Sven
> 
Thanks for the reply.

Eric P.
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Re: [Gimp-user] strange PNG from Adobe Fireworks

2008-10-18 Thread Sven Neumann
Hi,

On Fri, 2008-10-17 at 21:26 -0500, Eric P wrote:
> Check out this png.  I'm not sure if it is editable in the GIMP.
> http://i34.tinypic.com/rtzshs.png
> 
> First of all it's an indexed image.  You'll see two white arrows on the right 
> hand side.  Switch the mode to RGB and
> you'll see two new alpha transparent arrows appear on the left hand side (!?)
> 
> Checking the header of the image I see Adobe Fireworks in there.  Any ideas 
> what this anomaly of a png is?

rtzshs.png...
  Image Width: 20 Image Length: 110
  Bitdepth (Bits/Sample): 2
  Channels (Samples/Pixel): 1
  Pixel depth (Pixel Depth): 2
  Colour Type (Photometric Interpretation):
PALETTED COLOUR with alpha (3 colours, 3 transparent) 
  Image filter: Single row per byte filter 
  Interlacing: No interlacing 
  Compression Scheme: Deflate method 8, 32k window
  Resolution: 2834, 2834 (pixels per meter)
  FillOrder: msb-to-lsb
  Byte Order: Network (Big Endian)
  Number of text strings: 1 of 9
Software (xTXt deflate compressed): Adobe Fireworks CS3
  Offsets: 0, 0

This image uses an indexed palette with transparency information. This
is not fully supported in GIMP. The PNG loader seems to handle it
nicely, but the GIMP image display has some special code that thresholds
the alpha channel for images in indexed mode. This is because the code
was written for GIF images. The projection in indexed mode simulates the
alpha capabilities of the GIF format, where a pixel is either fully
transparent or opaque.


Sven


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Re: [Gimp-user] strange PNG from Adobe Fireworks

2008-10-18 Thread norman

> > Check out this png.  I'm not sure if it is editable in the GIMP.
> > http://i34.tinypic.com/rtzshs.png
> > 
> > First of all it's an indexed image.  You'll see two white arrows on the 
> > right hand side.  Switch the mode to RGB and
> > you'll see two new alpha transparent arrows appear on the left hand side 
> > (!?)
> > 
> > Checking the header of the image I see Adobe Fireworks in there.  Any ideas 
> > what this anomaly of a png is?
> 
> I went to the URL but all I got was a blank page.

My browser has a white background and, as was suggested in the reply
sent to me, I right clicked on the blank page and saved the image to my
desktop. I opened the image in Image Viewer and there was a checkered
rectangle with a white arrow at the top right corner pointing to the
right and another white arrow in the bottom right corner pointing
downwards. There is also a pale grey arrow pointing to the right in the
top left corner and another similar arrow pointing downwards in the
bottom left corner. The 2 grey arrows were not noticeable when the image
was opened in Gimp but the checkered rectangle and the white arrows were
there.

Norman

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Re: [Gimp-user] strange PNG from Adobe Fireworks

2008-10-18 Thread Owen
> On Fri, 2008-10-17 at 21:26 -0500, Eric P wrote:
>> Check out this png.  I'm not sure if it is editable in the GIMP.
>> http://i34.tinypic.com/rtzshs.png
>>
>> First of all it's an indexed image.  You'll see two white arrows on
>> the right hand side.  Switch the mode to RGB and
>> you'll see two new alpha transparent arrows appear on the left hand
>> side (!?)
>>
>> Checking the header of the image I see Adobe Fireworks in there.
>> Any ideas what this anomaly of a png is?
>
> I went to the URL but all I got was a blank page.



No you didn't. You got a transparent image with two whit arrows. What
colour is your browser background?

Try right clicking on the URL and "Save image as"



Owen



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Re: [Gimp-user] strange PNG from Adobe Fireworks

2008-10-18 Thread norman
On Fri, 2008-10-17 at 21:26 -0500, Eric P wrote:
> Check out this png.  I'm not sure if it is editable in the GIMP.
> http://i34.tinypic.com/rtzshs.png
> 
> First of all it's an indexed image.  You'll see two white arrows on the right 
> hand side.  Switch the mode to RGB and
> you'll see two new alpha transparent arrows appear on the left hand side (!?)
> 
> Checking the header of the image I see Adobe Fireworks in there.  Any ideas 
> what this anomaly of a png is?

I went to the URL but all I got was a blank page.

Norman

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[Gimp-user] strange PNG from Adobe Fireworks

2008-10-17 Thread Eric P
Check out this png.  I'm not sure if it is editable in the GIMP.
http://i34.tinypic.com/rtzshs.png

First of all it's an indexed image.  You'll see two white arrows on the right 
hand side.  Switch the mode to RGB and
you'll see two new alpha transparent arrows appear on the left hand side (!?)

Checking the header of the image I see Adobe Fireworks in there.  Any ideas 
what this anomaly of a png is?

Eric P.
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