FPvectorial "Unsupported vector graphics" - PDF
lazarus / 54-FPvectorial

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gummi.bear · 2017-09-15 12:17

I am trying to plot a pdf file to a canvas using the procedure

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i procedure
TmainForm.plotPDF(PlotFileName: string; Dest: TCanvas);var  Vec    :
TvVectorialDocument;  lFormat: TvVectorialFormat;begin    Vec :=
TvVectorialDocument.Create;  try    lFormat :=
TvVectorialDocument.GetFormatFromExtension(PlotFileName);   
Vec.ReadFromFile(PlotFileName, lFormat);   
DrawFPVectorialToCanvas(Vec.GetPageAsVectorial(0), Dest, 0, 0, 1.0,
-1.0);  finally    Vec.free;  end;end; 
but I am getting the "Unsupported vector graphics format." message
from Vec.ReadFromFile(PlotFileName, lFormat). Are there some
requirements on the format of the pdf files? My pdfs are generated by
R (attached below).

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wp · 2017-09-15 12:27

Since fpvectorial links reader/writer units only for the formats
needed you must add pdfvectorialreader to the uses clauses of your
program. But I doubt that you'll be able to read this file with
fpvectorial. As I saw recently this format is supported only in a very
basic way.

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molly · 2017-09-15 12:28

Quote from: gummi.bear on September 15, 2017, 02:17:39 pmCode:
[Select]    Vec.ReadFromFile(PlotFileName, lFormat);
but I am getting the "Unsupported vector graphics format." message
from Vec.ReadFromFile(PlotFileName, lFormat). Are there some
requirements on the format of the pdf files? My pdfs are generated by
R (attached below).
According to fpvectorial textdoc wiki:

QuoteTODO
General
 Comprehensive testing, including opening the files in as many word
processors and office suites as possible.  DOCX and ODT Readers
(volunteers required)  Add PDF reader/writer (current PDF support is
for Vector Image support only) Add HTML reader/writer  Add RTF
reader/writer  Produce well documented examples and store in
FPVectorial/Examples  Code Documentation for distributing with Lazarus
and fpvectorial wiki reads:
QuoteReaders for various image formats:
pdfvectorialreader - Read support for PDF files, supports compression,
only reads the first page

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gummi.bear · 2017-09-15 12:51

QuoteReaders for various image formats:
pdfvectorialreader - Read support for PDF files, supports compression,
only reads the first page

My pdf files have one page only and should be vector images. I also
tried to turn off the compression in R, but it didn't help. I assumed
that there is some support for pdf files because they are mentioned on
the wiki page. So maybe only my format is wrong?

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wp · 2017-09-15 13:57

The problem is that the pdfreader does not even compile... It is
certainly not too difficult to make it work, but I don't have the time
to focus on this issue. Patches are welcome.