Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Get Qt Extensions
  • Unsolved
Collapse
Brand Logo
  1. Home
  2. Qt Development
  3. General and Desktop
  4. QPixmap not read svg
Forum Updated to NodeBB v4.3 + New Features

QPixmap not read svg

Scheduled Pinned Locked Moved Solved General and Desktop
14 Posts 3 Posters 1.5k Views
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • M Offline
    M Offline
    Mikeeeeee
    wrote on last edited by
    #1

    Hi!
    In Ubuntu 20 QPixmap read svg, but in Windoes 10 QPixmap not read svg. Why? How QPixmap can read svg-file?

    jsulmJ 1 Reply Last reply
    0
    • M Mikeeeeee

      Hi!
      In Ubuntu 20 QPixmap read svg, but in Windoes 10 QPixmap not read svg. Why? How QPixmap can read svg-file?

      jsulmJ Offline
      jsulmJ Offline
      jsulm
      Lifetime Qt Champion
      wrote on last edited by
      #2

      @Mikeeeeee How did you install Qt on Windows? How do you read SVG (show code)?

      https://forum.qt.io/topic/113070/qt-code-of-conduct

      1 Reply Last reply
      0
      • M Offline
        M Offline
        Mikeeeeee
        wrote on last edited by
        #3

        I use PyQt, I install conda and after install pyqt in conda. This code work in Ubuntu 20:

                labelLogo = QLabel()
                pixmap = QPixmap("./images/logo.svg")
                pixmap = pixmap.scaled(200,200, QtCore.Qt.KeepAspectRatio)
                labelLogo.setPixmap(pixmap)
        
        jsulmJ JoeCFDJ 2 Replies Last reply
        0
        • M Mikeeeeee

          I use PyQt, I install conda and after install pyqt in conda. This code work in Ubuntu 20:

                  labelLogo = QLabel()
                  pixmap = QPixmap("./images/logo.svg")
                  pixmap = pixmap.scaled(200,200, QtCore.Qt.KeepAspectRatio)
                  labelLogo.setPixmap(pixmap)
          
          jsulmJ Offline
          jsulmJ Offline
          jsulm
          Lifetime Qt Champion
          wrote on last edited by
          #4

          @Mikeeeeee said in QPixmap not read svg:

          ./images/logo.svg

          this is a relative path. You should at least check whether pixmap is null or not: https://doc.qt.io/qt-5/qpixmap.html#isNull
          Also, check whether you have the SVG plug-in: plugins/imageformats/libqsvg.so

          https://forum.qt.io/topic/113070/qt-code-of-conduct

          M 1 Reply Last reply
          2
          • jsulmJ jsulm

            @Mikeeeeee said in QPixmap not read svg:

            ./images/logo.svg

            this is a relative path. You should at least check whether pixmap is null or not: https://doc.qt.io/qt-5/qpixmap.html#isNull
            Also, check whether you have the SVG plug-in: plugins/imageformats/libqsvg.so

            M Offline
            M Offline
            Mikeeeeee
            wrote on last edited by
            #5

            @jsulm but this work:

            pixmap = QPixmap("./images/logo.png")
            

            And I use Windows 10, Windows haven't .so. In conda I haven't file libqsvg. Hwot me need to do?

            jsulmJ 1 Reply Last reply
            0
            • M Mikeeeeee

              @jsulm but this work:

              pixmap = QPixmap("./images/logo.png")
              

              And I use Windows 10, Windows haven't .so. In conda I haven't file libqsvg. Hwot me need to do?

              jsulmJ Offline
              jsulmJ Offline
              jsulm
              Lifetime Qt Champion
              wrote on last edited by jsulm
              #6

              @Mikeeeeee said in QPixmap not read svg:

              Hwot me need to do?

              Search for *svg* in your PyQt set-up...

              https://forum.qt.io/topic/113070/qt-code-of-conduct

              1 Reply Last reply
              0
              • M Offline
                M Offline
                Mikeeeeee
                wrote on last edited by
                #7

                I have only SVGExporter.py in pyqtgraph

                jsulmJ 1 Reply Last reply
                0
                • M Mikeeeeee

                  I have only SVGExporter.py in pyqtgraph

                  jsulmJ Offline
                  jsulmJ Offline
                  jsulm
                  Lifetime Qt Champion
                  wrote on last edited by
                  #8

                  @Mikeeeeee So, no qsvg.dll? If so, then that's the reason why you can't load SVG images.

                  https://forum.qt.io/topic/113070/qt-code-of-conduct

                  1 Reply Last reply
                  0
                  • M Offline
                    M Offline
                    Mikeeeeee
                    wrote on last edited by
                    #9

                    What should I do? How can I add the desired library to the сonda?

                    jsulmJ 1 Reply Last reply
                    0
                    • M Mikeeeeee

                      What should I do? How can I add the desired library to the сonda?

                      jsulmJ Offline
                      jsulmJ Offline
                      jsulm
                      Lifetime Qt Champion
                      wrote on last edited by
                      #10

                      @Mikeeeeee Maybe you need to install the SVG plug-in? I never used conda, so check whether this plug-in requires an additional package to be installed.

                      https://forum.qt.io/topic/113070/qt-code-of-conduct

                      1 Reply Last reply
                      0
                      • M Offline
                        M Offline
                        Mikeeeeee
                        wrote on last edited by
                        #11

                        @jsulm said in QPixmap not read svg:

                        SVG plug-in

                        What is the correct name of this plugin?

                        jsulmJ 1 Reply Last reply
                        0
                        • M Mikeeeeee

                          I use PyQt, I install conda and after install pyqt in conda. This code work in Ubuntu 20:

                                  labelLogo = QLabel()
                                  pixmap = QPixmap("./images/logo.svg")
                                  pixmap = pixmap.scaled(200,200, QtCore.Qt.KeepAspectRatio)
                                  labelLogo.setPixmap(pixmap)
                          
                          JoeCFDJ Offline
                          JoeCFDJ Offline
                          JoeCFD
                          wrote on last edited by JoeCFD
                          #12

                          @Mikeeeeee wrong way to load svg because you may lose resolution. You never scale a svg picture.
                          QPixmap * pixmap = new QPixmap( QSize( 200, 200 ) );
                          pixmap->fill( Qt::transparent );
                          paint pixmap with svg engine.

                          1 Reply Last reply
                          0
                          • M Mikeeeeee

                            @jsulm said in QPixmap not read svg:

                            SVG plug-in

                            What is the correct name of this plugin?

                            jsulmJ Offline
                            jsulmJ Offline
                            jsulm
                            Lifetime Qt Champion
                            wrote on last edited by
                            #13

                            @Mikeeeeee said in QPixmap not read svg:

                            What is the correct name of this plugin?

                            I already gave it you before: qsvg.dll

                            https://forum.qt.io/topic/113070/qt-code-of-conduct

                            1 Reply Last reply
                            1
                            • M Offline
                              M Offline
                              Mikeeeeee
                              wrote on last edited by
                              #14

                              I reinstall conda and after its work

                              1 Reply Last reply
                              0

                              • Login

                              • Login or register to search.
                              • First post
                                Last post
                              0
                              • Categories
                              • Recent
                              • Tags
                              • Popular
                              • Users
                              • Groups
                              • Search
                              • Get Qt Extensions
                              • Unsolved