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List:       gimp-print-devel
Subject:    Re: [Gimp-print-devel] Canon MP750 photo printing resolution
From:       Cameron Braid <cameron () braid ! com ! au>
Date:       2009-01-25 10:37:28
Message-ID: a03a0f1a0901250237o301867aah342ae715acacc2e0 () mail ! gmail ! com
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On Sun, Jan 25, 2009 at 6:12 AM, Sascha Sommer <saschasommer@freenet.de>wrote:

> Hi,
>
> On Donnerstag, 22. Januar 2009, Cameron Braid wrote:
> >
> > Can anyone provide any pointers on how to make this print better ?
> >
>
> Hacking the ppd won't help. One would have to add a new printmode to the
> driver code. For this you first have to find out what settings the windows
> driver is using. If you want to do this print an image with the wanted
> settings on windows and choose the print to file option. Then take a look
> at
> the dumped file with the pixma_parse util in the test dir of the gutenprint
> distribution. Watch out for the t) command. You will have to adjust
> canon-modes.h canon-inks.h so that gutenprint produces the same output for
> the t) command.
>
> Regards
>
> Sascha
>

When printing with windows, the t) command says this :

 Color C Compression: 0 bpp 2 level 4
 Color M Compression: 0 bpp 2 level 4
 Color Y Compression: 0 bpp 2 level 4
 Color K Compression: 0 bpp 1 level 2
 Color c Compression: 0 bpp 2 level 4
 Color m Compression: 0 bpp 2 level 4
 Color y Compression: 0 bpp 0 level 0
 Color k Compression: 0 bpp 2 level 4

Which seems to already be covered by the static const canon_inkset_t
canon_22_C4M4Y4K2c4m4k4_inkset[] in canon-inks.h

However, when printing with linux, it says this :

 Color C Compression: 1 bpp 2 level 3
 Color M Compression: 1 bpp 2 level 3
 Color Y Compression: 0 bpp 1 level 2
 Color K Compression: 0 bpp 1 level 2
 Color c Compression: 0 bpp 0 level 0
 Color m Compression: 0 bpp 0 level 0
 Color y Compression: 0 bpp 0 level 0
 Color k Compression: 1 bpp 2 level 3

So, it looks like the driver isn't configured to use this inkset.

How would I go about adding this inkset into the MP750 driver ?

Cheers,

Cameron

[Attachment #5 (text/html)]

<br><div class="gmail_quote">On Sun, Jan 25, 2009 at 6:12 AM, Sascha Sommer <span \
dir="ltr">&lt;<a href="mailto:saschasommer@freenet.de">saschasommer@freenet.de</a>&gt;</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;"> Hi,<br>
<div><div></div><div class="Wj3C7c"><br>
On Donnerstag, 22. Januar 2009, Cameron Braid wrote:<br>
&gt;<br>
&gt; Can anyone provide any pointers on how to make this print better ?<br>
&gt;<br>
<br>
</div></div>Hacking the ppd won&#39;t help. One would have to add a new printmode to \
the<br> driver code. For this you first have to find out what settings the \
windows<br> driver is using. If you want to do this print an image with the \
wanted<br> settings on windows and choose the print to file option. Then take a look \
at<br> the dumped file with the pixma_parse util in the test dir of the \
gutenprint<br> distribution. Watch out for the t) command. You will have to \
adjust<br> canon-modes.h canon-inks.h so that gutenprint produces the same output \
for<br> the t) command.<br>
<br>
Regards<br>
<font color="#888888"><br>
Sascha<br>
</font></blockquote><div><br>When printing with windows, the t) command says this \
:<br> <br>
&nbsp;Color C Compression: 0 bpp 2 level 4<br>
&nbsp;Color M Compression: 0 bpp 2 level 4<br>
&nbsp;Color Y Compression: 0 bpp 2 level 4<br>
&nbsp;Color K Compression: 0 bpp 1 level 2<br>
&nbsp;Color c Compression: 0 bpp 2 level 4<br>
&nbsp;Color m Compression: 0 bpp 2 level 4<br>
&nbsp;Color y Compression: 0 bpp 0 level 0<br>
&nbsp;Color k Compression: 0 bpp 2 level 4<br>
<br>
Which seems to already be covered by the static const canon_inkset_t \
canon_22_C4M4Y4K2c4m4k4_inkset[] in canon-inks.h<br> <br>
However, when printing with linux, it says this :<br>
<br>
&nbsp;Color C Compression: 1 bpp 2 level 3<br>
&nbsp;Color M Compression: 1 bpp 2 level 3<br>
&nbsp;Color Y Compression: 0 bpp 1 level 2<br>
&nbsp;Color K Compression: 0 bpp 1 level 2<br>
&nbsp;Color c Compression: 0 bpp 0 level 0<br>
&nbsp;Color m Compression: 0 bpp 0 level 0<br>
&nbsp;Color y Compression: 0 bpp 0 level 0<br>
&nbsp;Color k Compression: 1 bpp 2 level 3<br>
<br>
So, it looks like the driver isn&#39;t configured to use this inkset.<br>
<br>
How would I go about adding this inkset into the MP750 driver ?&nbsp; <br>&nbsp;
<br></div></div>Cheers,<br><br>Cameron<br>



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