Exported figures

Exported figures

[Aditya Mahajan]

Hi Hans,

Two bugs in figure export:

1. If one uses images without extension, then the generated 
\jobname-images.css file does not contain any extensions; so no figures 
are shown in the output. One possible fix is to change \dotagfigure in 
back-ini.mkiv to

\appendtoks % we can have differently scaled images

\def\dotagfigure{\taggedctxcommand{settagfigure(,"\figurefullname","\figurefilepage",\number\dimexpr\figurewidth,\number\dimexpr\figureheight)}}%
\to \everyenableelements
% \figurefullname instead of \figurefileoriginal


2. What is the best way to handle multipage pdf images? I frequently 
create a big pdf with many images and then use

\externalfigure[...][page=2]

I don't know if svg has support for multiple pages or not.

Aditya~
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Re: Exported figures

[Hans Hagen]

On 26-8-2011 08:16, Aditya Mahajan wrote:
> Hi Hans,
>
> Two bugs in figure export:
>
> 1. If one uses images without extension, then the generated
> \jobname-images.css file does not contain any extensions; so no figures
> are shown in the output. One possible fix is to change \dotagfigure in
> back-ini.mkiv to
>
> \appendtoks % we can have differently scaled images
>
> \def\dotagfigure{\taggedctxcommand{settagfigure(,"\figurefullname","\figurefilepage",\number\dimexpr\figurewidth,\number\dimexpr\figureheight)}}%
>
> \to \everyenableelements
> % \figurefullname instead of \figurefileoriginal

tricky ... \figurefullname can be the converted image (say that we wa 
ask for an svg .. .it gets converted to pdf then) .. needs a bit of 
thinking

> 2. What is the best way to handle multipage pdf images? I frequently
> create a big pdf with many images and then use
>
> \externalfigure[...][page=2]
>
> I don't know if svg has support for multiple pages or not.

The 'converter' program can filter the pages ... so we need to pass the 
page number.

So we have 2 todo's

Hans

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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___________________________________________________________________________________

Re: Exported figures

[Aditya Mahajan]

On Sat, 27 Aug 2011, Hans Hagen wrote:

> On 26-8-2011 08:16, Aditya Mahajan wrote:
>> 2. What is the best way to handle multipage pdf images? I frequently
>> create a big pdf with many images and then use
>> 
>> \externalfigure[...][page=2]
>> 
>> I don't know if svg has support for multiple pages or not.
>
> The 'converter' program can filter the pages ... so we need to pass the page 
> number.

Page number is already passed. The filename conversion should make 
use of it.

I think that the best solution is to allow the user to configure (using a 
directive) the function that sets the new name for a pdf file, rather than 
hardcoding an extension.


Also, can you add background-repeat: no-repeat; to imagetemplate.

local imagetemplate = [[
%s[id="%s"] {
     display          : block ;
     background-image : url(%s) ;
     background-size  : 100%% auto ;
     background-repeat:no-repeat;
     width            : %s ;
     height           : %s ;
}]]

Normally, this should not matter, but sometimes part of the image is 
repeated due to rounding differences.

Aditya
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Re: Exported figures

[Hans Hagen]

On 28-8-2011 05:41, Aditya Mahajan wrote:

> Also, can you add background-repeat: no-repeat; to imagetemplate.
>
> local imagetemplate = [[
> %s[id="%s"] {
> display : block ;
> background-image : url(%s) ;
> background-size : 100%% auto ;
> background-repeat:no-repeat;
> width : %s ;
> height : %s ;
> }]]

ok

> Normally, this should not matter, but sometimes part of the image is
> repeated due to rounding differences.

what magic flag deals with a specific page in pdf in inkscape?

Hans

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
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___________________________________________________________________________________

Re: Exported figures

[Aditya Mahajan]

>> Normally, this should not matter, but sometimes part of the image is
>> repeated due to rounding differences.
>
> what magic flag deals with a specific page in pdf in inkscape?

I used svg2pdf which converts all pages of a pdf to split svg files. But, 
in the end, decided not to use svg images because most browsers do no 
support svg inserted through css background-image. Instead, I am not 
simply using png images and using imagemagics convert to convert pdf to 
png.

Aditya
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