The png files of WDK sample can't be opened

Dear Sir,
I check the Microsoft WDK 7600 sample code.
I find the PNG files of WDK swtuner folder, but I can’t watch it on Windows
OS.(path is :
\WINDDK\7600.16385.0\src\swtuner\MergedDevice\BDAD MBTHTuner\Images)
I want to use the Microsoft Paint or Adobe Photoshop to edit it, but the
picture cannot be opened.
I don’t know how to modify it.
Could you give me any suggestion?
Thanks a lot,

Libra Wu <Libra > wrote:
>
>I check the Microsoft WDK 7600 sample code.
>I find the PNG files of WDK swtuner folder, but I can’t watch it on Windows
>OS.(path is :
>\WINDDK\7600.16385.0\src\swtuner\MergedDevice\BDA DMBTHTuner\Images)
>I want to use the Microsoft Paint or Adobe Photoshop to edit it, but the
>picture cannot be opened.
>I don’t know how to modify it.
>Could you give me any suggestion?

The developers must have been on drugs when they created those files with
..png extensions. Those files contain PNG images that have been Base64
encoded, then written out in Unicode (UTF-16).

You will have to use some kind of program to convert them to image files. I
was able to use a Python script to read them in and decode them:

import base64
import codecs
s = base64.b64decode( codecs.open('bg2.png','r','utf-16').read() )
open( 'bg2x.png', 'wb' ).write( s )
--
Tim Roberts,
Providenza & Boekelheide, Inc.

Dear Tim,

Thanks a lot,
Best regards,
Libra

"Tim Roberts" wrote:

> Libra Wu <Libra > wrote:
> >
> >I check the Microsoft WDK 7600 sample code.
> >I find the PNG files of WDK swtuner folder, but I can’t watch it on Windows
> >OS.(path is :
> >\WINDDK\7600.16385.0\src\swtuner\MergedDevice\BDA DMBTHTuner\Images)
> >I want to use the Microsoft Paint or Adobe Photoshop to edit it, but the
> >picture cannot be opened.
> >I don’t know how to modify it.
> >Could you give me any suggestion?
>
> The developers must have been on drugs when they created those files with
> ..png extensions. Those files contain PNG images that have been Base64
> encoded, then written out in Unicode (UTF-16).
>
> You will have to use some kind of program to convert them to image files. I
> was able to use a Python script to read them in and decode them:
>
> import base64
> import codecs
> s = base64.b64decode( codecs.open('bg2.png','r','utf-16').read() )
> open( 'bg2x.png', 'wb' ).write( s )
> --
> Tim Roberts,
> Providenza & Boekelheide, Inc.
> .
>

This is because a PBDA driver must return images as base64 encoded PNGs (via
the GPNV service).

"Libra Wu" wrote:

> Dear Tim,
>
> Thanks a lot,
> Best regards,
> Libra
>
> "Tim Roberts" wrote:
>
> > Libra Wu <Libra > wrote:
> > >
> > >I check the Microsoft WDK 7600 sample code.
> > >I find the PNG files of WDK swtuner folder, but I can’t watch it on Windows
> > >OS.(path is :
> > >\WINDDK\7600.16385.0\src\swtuner\MergedDevice\BDA DMBTHTuner\Images)
> > >I want to use the Microsoft Paint or Adobe Photoshop to edit it, but the
> > >picture cannot be opened.
> > >I don’t know how to modify it.
> > >Could you give me any suggestion?
> >
> > The developers must have been on drugs when they created those files with
> > ..png extensions. Those files contain PNG images that have been Base64
> > encoded, then written out in Unicode (UTF-16).
> >
> > You will have to use some kind of program to convert them to image files. I
> > was able to use a Python script to read them in and decode them:
> >
> > import base64
> > import codecs
> > s = base64.b64decode( codecs.open('bg2.png','r','utf-16').read() )
> > open( 'bg2x.png', 'wb' ).write( s )
> > --
> > Tim Roberts,
> > Providenza & Boekelheide, Inc.
> > .
> >

alberto <> wrote:
>
>On my Windows 7 host, Microsoft Paint, Internet Explorer 8 and Windows
>Photo Viewer can open .png files ok.

Of course they can. That's not the point. The point is that these files
in the WDK have a .png extension, but they aren't PNG files. They are PNG
files that have been base64-encoded. None of those tools can open them.

They should have been called xxx.png.b64 to eliminate confusion.
--
Tim Roberts,
Providenza & Boekelheide, Inc.