FPvectorial "Unsupported vector graphics" - PDF

[gummi.bear]

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

Code: Pascal  [Select][+][-]

1. procedure TmainForm.plotPDF(PlotFileName: string; Dest: TCanvas);
2. var
3.   Vec    : TvVectorialDocument;
4.   lFormat: TvVectorialFormat;
5. begin
6.  
7.    Vec := TvVectorialDocument.Create;
8.   try
9.     lFormat := TvVectorialDocument.GetFormatFromExtension(PlotFileName);
10.     Vec.ReadFromFile(PlotFileName, lFormat);
11.     DrawFPVectorialToCanvas(Vec.GetPageAsVectorial(0), Dest, 0, 0, 1.0, -1.0);
12.   finally
13.     Vec.free;
14.   end;
15. end;
16.  

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).

[wp]

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.

[molly]

Code: [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:

TODO
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:

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

[gummi.bear]

Readers 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?

[wp]

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.