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Failed to get image from provider

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  • sierdzioS sierdzio

    @gabor53 said in Failed to get image from provider:

    @SGaist ,
    Yes. According to qDebug the content is

    MakePix requestPixmap id:  "file:///C:/Users/gabor/Pictures/133CANON/IMG_3344.jpg
    ``
    

    You need to remove file:/// from that URL, otherwise QPixmap won't handle it.

    As others note, however - it seems you don't need an image provider here at all. QML can handle JPG images out of the box.

    G Offline
    G Offline
    gabor53
    wrote on last edited by
    #8

    Hi @sierdzio ,
    It is true, but how can I save the jpg to localstorage?
    Thank you.

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    • sierdzioS Offline
      sierdzioS Offline
      sierdzio
      Moderators
      wrote on last edited by
      #9

      You mean you want to take the jpg from one location and save it in another? Use QFile::copy().

      (Z(:^

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      • sierdzioS sierdzio

        You mean you want to take the jpg from one location and save it in another? Use QFile::copy().

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        gabor53
        wrote on last edited by
        #10

        @sierdzio
        I want to save the actual image to a db.

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        • mrjjM mrjj

          @gabor53
          Hi
          Ok, but are you sure the QQuickImageProvider should be involved in the
          saving of the image?
          The syntax "image://pix/" seems for loading only, docs mention nothing about saving.
          Anyway, i was just wondering.

          G Offline
          G Offline
          gabor53
          wrote on last edited by
          #11

          @mrjj,
          The goal is to save the actual jpg into Qt Quick Local Storage. To do that I need to create a Blob from the jpg file. I don't think it is possible to do in QML; that's why I use QQuickImageProvider to send the image from QML to C++ and return a pixmap to QML.
          If I copy 1.jpg to the qml folder and pass1.jpg to QQuickImageProvider the image is correctly displayed, which means the path I get from fileDialog.fileUrl is incorrect.
          How can I fix the path so fileDialog.fileUrl provides the right path to the image?
          Thank you.

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          • SGaistS Offline
            SGaistS Offline
            SGaist
            Lifetime Qt Champion
            wrote on last edited by
            #12

            @sierdzio already answered that question.

            Interested in AI ? www.idiap.ch
            Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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            • mrjjM Offline
              mrjjM Offline
              mrjj
              Lifetime Qt Champion
              wrote on last edited by
              #13

              hi
              so you get a pixmap back to QML but how do you then convert it to the blob?
              As far as i understand, Qt Quick Local Storage is a sqllite database so
              you need it as QbyteArray to save it.

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              • mrjjM mrjj

                hi
                so you get a pixmap back to QML but how do you then convert it to the blob?
                As far as i understand, Qt Quick Local Storage is a sqllite database so
                you need it as QbyteArray to save it.

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                gabor53
                wrote on last edited by
                #14

                @mrjj
                Is there a way to convert pixmap into blob in QML?

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                • G gabor53

                  @mrjj
                  Is there a way to convert pixmap into blob in QML?

                  mrjjM Offline
                  mrjjM Offline
                  mrjj
                  Lifetime Qt Champion
                  wrote on last edited by
                  #15

                  @gabor53
                  Hi
                  sadly i dont know QML well enough to answer that.
                  It seems it get converted to ArrayBuffer if used in signals.
                  from c++ to QML.
                  but im not sure how you can get the pixmap into that.

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                  • SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by
                    #16

                    Did you already check Qt Quick Local Storage QML Types ?

                    By the way, why do you want to store images there ?

                    Interested in AI ? www.idiap.ch
                    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                    • SGaistS SGaist

                      Did you already check Qt Quick Local Storage QML Types ?

                      By the way, why do you want to store images there ?

                      G Offline
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                      gabor53
                      wrote on last edited by gabor53
                      #17

                      @SGaist ,
                      I checked Local Storage QML Types but it doesn't really talk about images.
                      I'm creating a small app where I can store an image and a description of the image. I used to do it by storing only the url, but eventually the images got moved and I ended up with a bunch of broken links.

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                      • SGaistS Offline
                        SGaistS Offline
                        SGaist
                        Lifetime Qt Champion
                        wrote on last edited by
                        #18

                        In that case, I would rather go with a more classical approach through C++ especially if you want to recover the images.

                        Interested in AI ? www.idiap.ch
                        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                        • SGaistS SGaist

                          In that case, I would rather go with a more classical approach through C++ especially if you want to recover the images.

                          G Offline
                          G Offline
                          gabor53
                          wrote on last edited by
                          #19

                          @SGaist
                          Thank you. I will do it that way.

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