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QtPDF not availabel on mac?

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  • JoeCFDJ Offline
    JoeCFDJ Offline
    JoeCFD
    wrote on last edited by JoeCFD
    #14

    Use free poppler for pdf( under GPLv2 or GPLv3) . It is not hard to add it.
    Qt uses PDFium. https://wiki.qt.io/Handling_PDF
    Poppler seems even better than PDFium
    https://hub.alfresco.com/t5/alfresco-content-services-blog/pdf-rendering-engine-performance-and-fidelity-comparison/ba-p/287618

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    • JoeCFDJ Offline
      JoeCFDJ Offline
      JoeCFD
      wrote on last edited by JoeCFD
      #15

      Qt PDF is available under both GPLv3 and LGPLv3.
      https://marketplace.qt.io/products/qtpdf

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      • JoeCFDJ Offline
        JoeCFDJ Offline
        JoeCFD
        wrote on last edited by
        #16

        can you run the example?
        qt-examples/Qt-5.15.2/pdf/pdfviewer

        no problem to run it on Ubuntu.

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        • JoeCFDJ JoeCFD

          can you run the example?
          qt-examples/Qt-5.15.2/pdf/pdfviewer

          no problem to run it on Ubuntu.

          Z Offline
          Z Offline
          zhenghan
          wrote on last edited by
          #17

          @JoeCFD Thanks for your reply. I can't run the example with error "Unknown modules in Qt: pdf". It is wired why Qt can't find the module, because the Qt5Pdf.dll is in msvc2019_64/bin directory, and Qt5Pdf.lib in msvc2019_64/lib directory. But in msvc2019_64/include directory there is no subfolder named Qt5Pdf.

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          • JoeCFDJ Offline
            JoeCFDJ Offline
            JoeCFD
            wrote on last edited by
            #18

            You have to install this component
            https://wiki.qt.io/QtPDF_Build_Instructions

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            • JoeCFDJ JoeCFD

              You have to install this component
              https://wiki.qt.io/QtPDF_Build_Instructions

              Z Offline
              Z Offline
              zhenghan
              wrote on last edited by
              #19

              @JoeCFD said in QtPDF not availabel on mac?:

              https://wiki.qt.io/QtPDF_Build_Instructions

              Thanks for your reply. I have complied this component. And it works.

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              • JoeCFDJ JoeCFD

                You have to install this component
                https://wiki.qt.io/QtPDF_Build_Instructions

                Z Offline
                Z Offline
                zhenghan
                wrote on last edited by
                #20

                @JoeCFD I want develop a pdf application in which I want to edit the pdf file, adding a digit signature in the pdf. What pdf library do you think is proper for the purpose?
                I have find PoDoFo, and poppler, QtPdf(seems can't modify pdf). Again thanks for your time.

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                • JoeCFDJ Offline
                  JoeCFDJ Offline
                  JoeCFD
                  wrote on last edited by JoeCFD
                  #21

                  d30a723b-169f-4c0e-8390-6ec2f077b01e-image.png

                  MuPDF is the best. PDFium(Qt) is second. XPDF(Poppler) is third. You choose the better one for your app. You need to pay attention to license issue.

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                  • Z zhenghan

                    @artwaw Hi, sir. I have met the same problem. Did you solve it yet? I use qtcreator on windows, and I have a Qt5Pdf.dll in my bin directory. But when I use QT += pdf, I got the same error, Unknown modules in QT: pdf.

                    artwawA Offline
                    artwawA Offline
                    artwaw
                    wrote on last edited by
                    #22

                    @zhenghan Hi, sorry for late reply - I just built it from source, signed and installed. Like you did, from what I see.

                    For more information please re-read.

                    Kind Regards,
                    Artur

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                    • D Offline
                      D Offline
                      DerReisende
                      wrote on last edited by
                      #23

                      I am successfully using PoDoFo from vcpkg for manipulating PDF (merging files, adding text content ,etc) files in my Qt 6.1 cmake project. Adding digital signatures with it should be possible ( I have read some code for it in the library but I don't have a use-case currently).
                      Be sure to install the [fontconfig] version of podofo otherwise you will get unexpected crashes on windows when drawing text with fonts.
                      Coding with it is quite straightforward although the documentation could be better - but I am no fluent c++ coder.

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                      • JoeCFDJ JoeCFD

                        d30a723b-169f-4c0e-8390-6ec2f077b01e-image.png

                        MuPDF is the best. PDFium(Qt) is second. XPDF(Poppler) is third. You choose the better one for your app. You need to pay attention to license issue.

                        Z Offline
                        Z Offline
                        zhenghan
                        wrote on last edited by
                        #24

                        @JoeCFD Thanks for your advice. Very appreciate.

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                        • artwawA artwaw

                          @zhenghan Hi, sorry for late reply - I just built it from source, signed and installed. Like you did, from what I see.

                          Z Offline
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                          zhenghan
                          wrote on last edited by
                          #25

                          @artwaw Thank you.

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                          • D DerReisende

                            I am successfully using PoDoFo from vcpkg for manipulating PDF (merging files, adding text content ,etc) files in my Qt 6.1 cmake project. Adding digital signatures with it should be possible ( I have read some code for it in the library but I don't have a use-case currently).
                            Be sure to install the [fontconfig] version of podofo otherwise you will get unexpected crashes on windows when drawing text with fonts.
                            Coding with it is quite straightforward although the documentation could be better - but I am no fluent c++ coder.

                            Z Offline
                            Z Offline
                            zhenghan
                            wrote on last edited by
                            #26

                            @DerReisende Thank you. I will try it.

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