I need help to compile fpvectorial examples
lazarus / 54-FPvectorial

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pfergiu · 2013-07-13 22:14

Hi all
I'm new at Lazarus.
I've tried to compile fpvectorial examples, but I had no luck with
this. Then, I visited this link:
http://wiki.freepascal.org/fpvectorial

and there, I found this
https://lazarus-ccr.svn.sourceforge.net/svnroot/lazarus-ccr

Later, I got compilation errors until I found this link
https://github.com/alrieckert/lazarus/blob/master/components/fpvectori
al/fpvectorial.pas

So, I downloaded this new version and some examples (i.e. fpvviewer)
finally started to work. At least some parts of them.
I'm wondering if there is any updated and compilable version of all
this. I'm still fighting with some remaining errors.
I'm specially interested in drawing SVG files.
I'm using revision 41613 of Lazarus.

Thanks in advance,

pfergiu

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BigChimp · 2013-07-14 03:11

There's a lot of missing information: what exactly goes wrong,  FPC
version used, operating system etc.

See here
http://www.catb.org/~esr/faqs/smart-questions.html#code
and the link in my signature.

That wiki page states fpvectorial code is included in Lazarus. Did you
find it?

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pfergiu · 2013-07-14 03:43

Thanks for your quick answer, BigChimp.

Sorry, I will read the rules before asking.
Here you go the answers to your questions:

FPC 2.6.2
Lazarus v1.0.10
Revision SVN 41613
i386-win32-win32/win64

Ok, I see now what you mentioned about the wiki page. My mistake.
Thanks for your help.

pfergiu

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BigChimp · 2013-07-14 04:18

@Pfergiu: rules, rules... it's more guidelines  Thanks for the info.

Hint: you can put your OS, FPC, Laz version in your forum signature so
you don't have to remember to specify it

Hope you can get fpvectorial working; if not, the forum is there to
help...

Thanks,
BigChimp

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felipemdc · 2013-07-14 11:04

fpvviewer from subversion is compatible with the latest fpvectorial
from the lazarus subversion repository (right now it is compatible
with revisions above 41000 or something like that, but this is not a
rule, if I make changes it might start working only with even newer
revisions). You should download all files of the latest fpvectorial,
not only fpvectorial.pas

You can download all of lazarus from svn for example, then fpvectorial
is in the folder lazarus/components/fpvectorial

Or only download fpvectorial

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pfergiu · 2013-07-14 15:36

Thanks felipemdc and BigChimp for your help.

I think I'm doing better now

I'm working right now with SVG images, generated by inkscape (version
0.48.4 r9939) and trying to figure out why some images work fine with
fpvectorial and others don't.

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pfergiu · 2013-07-17 03:26

Hi again.
I been debugging the code of fpvectorial for understand how it works
and I think I found a tiny improvement.
If you are using milimiters in your svg file, the parser work fine,
but if you don't, may be you can get random values for width and
height.
Is a minor change for function "StringWithUnitToFloat" of
svgvectorialreader.

function TvSVGVectorialReader.StringWithUnitToFloat(AStr: string):
Single;
var
  UnitStr, ValueStr: string;
  Len: Integer;
begin
  // Check the unit
  Len := Length(AStr);
  UnitStr := Copy(AStr, Len-1, 2);
  if UnitStr = 'mm' then
  begin
    ValueStr := Copy(AStr, 1, Len-2);
    Result := StrToInt(ValueStr);
  end
  else
    Result := StrToInt(AStr);
end;

I hope this can help.
Regards,

pfergiu

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felipemdc · 2013-07-28 06:31

Hello, thanks for the change, but always provide changes as patches
against the latest lazarus trunk from SVN.

Instructions here: http://wiki.freepascal.org/Creating_A_Patch

Your case shows very well why this rule exists:

1> It is not possible from your pasted code to see what you changed.
If it was in a patch format I could easily see this.
2> The code which you mention has already changed a lot, so the
provided improvement makes no sense in the latest code. This explains
why patches should be made against the latest lazarus from subversion,
not against release like our 1.0.10. There is a large difference
between fixes releases and the latest trunk even if a fixes release
was released today. Because fix releases do not contain all commits in
lazarus trunk.

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pfergiu · 2013-07-28 21:50

Understood. Thank you.