[metapost] Clipped svg output

[luigi scarso]

On Wed, 18 Jan 2023 at 12:53, Lutz Haseloff <lutz.haseloff at toppkieker.info>
wrote:

> Hi Luigi,
>
> I tested a bit further.
>
> MP:
>
> outputformat := "svg";
> outputtemplate := "%j-%c.%{outputformat}";
> beginfig(19)
> fill fullcircle scaled 19 withcolor red ;
> endfig;
> end
>
> SVG:
>
> <?xml version="1.0"?>
> <!-- Created by MetaPost 2.02 on 2023.01.18:1229 -->
> <svg version="1.1" xmlns="http://www.w3.org/2000/svg"
> <http://www.w3.org/2000/svg> xmlns:xlink="http://www.w3.org/1999/xlink"
> <http://www.w3.org/1999/xlink> width="19.000000" height="19.000000"
> viewBox="0 0 19.000000 19.000000">
> <!-- Original BoundingBox: -9.500000 -9.500000 9.500000 9.500000 -->
>   <path d="M18.500000 9.000000 (should be 19.0 9.5) ... 11.519557
> -0.500000 (should be 0) ... -0.500000 9.000000 (should be 0) ... ,18.500000
> 9.000000Z" style="fill: rgb(100.000000%,0.000000%,0.000000%);stroke:
> none;"></path>
> </svg>
>
> It seems, that the path d is not correctly transformed from the ps hires
> boundingbox (-9.5 -9.5 9.5 9.5) to the svg viewbox (0 0 19 19).
>
> With even sizes ( say 20) it works ok.
>
>
>
indeed, I was looking at it ... this evening can check it better

--
luigi



> Greetings Lutz
>
>
> Am 15.01.2023 um 15:01 schrieb luigi scarso:
>
>
>
> On Mon, 9 Jan 2023 at 16:33, Lutz Haseloff <lutz.haseloff at toppkieker.info>
> wrote:
>
>> Hi all,
>>
>> the svg output of recent metapost (linux and windows) seems to be clipped
>> or the viewbox of the svg is shifted a small amount down and right.
>>
>> My test.mp is:
>>
>> outputformat := "svg";
>> outputtemplate := "%j.%{outputformat}";
>> beginfig(1)
>> draw fullcircle scaled 20;
>> endfig;
>> end
>>
>> The resulting svg included in a context lmtx file:
>>
>> \starttext
>> \startTEXpage
>> \externalfigure[test.svg][conversion=mp]
>> \stopTEXpage
>> \stoptext
>>
>> eps and png output is ok.
>>
>> Has it to do with the recent change in the svg clippath?
>> Am I doing something wrong?
>>
>> Greetings
>>
>> Lutz
>> --
>> http://tug.org/metapost/
>
>
> hm, I think we should consider the pen; fig 1 is almost ok without shift
> because the pen is very thin;
> fig 2 is ok only if  I shift the fullcircle  of half pen :
>
> outputformat := "svg";
> outputtemplate := "%j-%c.%{outputformat}";
> beginfig(1)
> pickup pencircle scaled 0.01;
> draw fullcircle scaled 20 ;
> draw (10,-10)--(10,10)--(-10,10)--(-10,-10)--(10,-10) withpen pencircle
> scaled 0.01 withcolor red;
> endfig;
> beginfig(2)
> pickup pencircle scaled 1;
> draw fullcircle scaled 20 shifted (0.5,-0.5);
> draw (10,-10)--(10,10)--(-10,10)--(-10,-10)--(10,-10) withpen pencircle
> scaled 0.01 withcolor red;
> endfig;
> end
>
> --
> luigi
>
> --
> http://tug.org/metapost/
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