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. [SOLVED] libpng warning: iCCP: known incorrect sRGB profile drive me nuts
Forum Updated to NodeBB v4.3 + New Features

[SOLVED] libpng warning: iCCP: known incorrect sRGB profile drive me nuts

Scheduled Pinned Locked Moved General and Desktop
21 Posts 6 Posters 161.9k Views 2 Watching
  • 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.
  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #4

    You'd have to rebuild the png plugin after "fixing" the sources to not do the check

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

    mrjjM 1 Reply Last reply
    0
    • SGaistS SGaist

      You'd have to rebuild the png plugin after "fixing" the sources to not do the check

      mrjjM Offline
      mrjjM Offline
      mrjj
      Lifetime Qt Champion
      wrote on last edited by
      #5

      @SGaist
      Which means I would have to have VSxxx excact version , which I do not so I am going to try the libpng forums to find out what exactly it thinks is wrong with the embedded color profile. If only it would also print the file name....

      Thank you

      1 Reply Last reply
      0
      • SGaistS Offline
        SGaistS Offline
        SGaist
        Lifetime Qt Champion
        wrote on last edited by
        #6

        Why ? You already have the compiler matching your Qt version, no need of more for testing the png plugin

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

        mrjjM 1 Reply Last reply
        0
        • SGaistS SGaist

          Why ? You already have the compiler matching your Qt version, no need of more for testing the png plugin

          mrjjM Offline
          mrjjM Offline
          mrjj
          Lifetime Qt Champion
          wrote on last edited by
          #7

          @SGaist
          Hi
          But my Qt Creator is compiled with VS so I assumed that compiling a new png plugin with minGW is a no go ? (as in wont work)

          1 Reply Last reply
          0
          • SGaistS Offline
            SGaistS Offline
            SGaist
            Lifetime Qt Champion
            wrote on last edited by
            #8

            The Qt version used for Qt Creator and the one you use for your application doesn't need to match unless you are building a Qt Creator plugin but in the case of your tests to disable this warning, you don't need to build a Qt Creator plugin.

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

            mrjjM 1 Reply Last reply
            0
            • SGaistS SGaist

              The Qt version used for Qt Creator and the one you use for your application doesn't need to match unless you are building a Qt Creator plugin but in the case of your tests to disable this warning, you don't need to build a Qt Creator plugin.

              mrjjM Offline
              mrjjM Offline
              mrjj
              Lifetime Qt Champion
              wrote on last edited by
              #9

              @SGaist
              Ahh, now I understand you. (i think)
              So you say I can create a new png plugin
              and then load that in my application ?
              I guess I have to put it in build folder/plugins for app to load the modified one?

              1 Reply Last reply
              0
              • SGaistS Offline
                SGaistS Offline
                SGaist
                Lifetime Qt Champion
                wrote on last edited by
                #10

                IIRC, the plugin will be replaced directly in your Qt installation once built

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

                mrjjM 1 Reply Last reply
                0
                • SGaistS SGaist

                  IIRC, the plugin will be replaced directly in your Qt installation once built

                  mrjjM Offline
                  mrjjM Offline
                  mrjj
                  Lifetime Qt Champion
                  wrote on last edited by
                  #11

                  @SGaist
                  As in
                  D:\Qt\Tools\QtCreator\bin\plugins\imageformats
                  hmm
                  http://doc.qt.io/qt-5/qtimageformats-index.html

                  dont list PNG.

                  So its not a plugin but sort of build in ?

                  1 Reply Last reply
                  0
                  • SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by
                    #12

                    No, as in D:\Qt\5.5\MinGW\plugins\imageformats

                    Don't mix the Qt you use with Qt Creator.

                    PNG support is in qtbase (it's in the list on the second line of the first paragraph). But now that you mentioned it, you're right: it's builtin.

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

                    mrjjM 1 Reply Last reply
                    0
                    • SGaistS SGaist

                      No, as in D:\Qt\5.5\MinGW\plugins\imageformats

                      Don't mix the Qt you use with Qt Creator.

                      PNG support is in qtbase (it's in the list on the second line of the first paragraph). But now that you mentioned it, you're right: it's builtin.

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

                      @SGaist
                      Ahh, of cause . Creator is Vs but mingw need its own version.
                      Hmm I getting blind, as I see no mention of qtbase but now i know.
                      Maybe I should try it on linux where all will be gcc. (I hope)

                      Thank you for your time.

                      1 Reply Last reply
                      0
                      • SGaistS Offline
                        SGaistS Offline
                        SGaist
                        Lifetime Qt Champion
                        wrote on last edited by
                        #14

                        The Qt Gui module is in qtbase.

                        But again, it has nothing to do with Qt Creator, to make your tests with pngs, you'll have to build qtbase (only qtbase, no need for the rest) so it will be a new Qt version + corresponding Kit for Qt Creator

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

                        mrjjM 1 Reply Last reply
                        0
                        • SGaistS SGaist

                          The Qt Gui module is in qtbase.

                          But again, it has nothing to do with Qt Creator, to make your tests with pngs, you'll have to build qtbase (only qtbase, no need for the rest) so it will be a new Qt version + corresponding Kit for Qt Creator

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

                          @SGaist
                          Ah. That way.
                          Is there anywhere I can see which modules are part of what etc? like an overview.
                          So qtbase.pro files must the one Im looking for.

                          I assume getting the one from
                          git://gitorious.org/qt/qtbase.git.

                          could work.

                          Thank you for all the info.

                          mrjjM 1 Reply Last reply
                          0
                          • mrjjM mrjj

                            @SGaist
                            Ah. That way.
                            Is there anywhere I can see which modules are part of what etc? like an overview.
                            So qtbase.pro files must the one Im looking for.

                            I assume getting the one from
                            git://gitorious.org/qt/qtbase.git.

                            could work.

                            Thank you for all the info.

                            mrjjM Offline
                            mrjjM Offline
                            mrjj
                            Lifetime Qt Champion
                            wrote on last edited by
                            #16

                            well it seems libpng follow standard and
                            photoshop is not strict enough, so I just have to live with it or
                            strip the profile completely.

                            "
                            Error detection in some chunks has improved; in particular the iCCP chunk
                            reader now does pretty complete validation of the basic format. Some bad
                            profiles that were previously accepted are now rejected, in particular the
                            very old broken Microsoft/HP sRGB profile. The PNG spec requirement that
                            only grayscale profiles may appear in images with color type 0 or 4 and that
                            even if the image only contains gray pixels, only RGB profiles may appear
                            in images with color type 2, 3, or 6, is now enforced. The sRGB chunk
                            is allowed to appear in images with any color type.
                            "

                            1 Reply Last reply
                            0
                            • mrjjM mrjj

                              When adding png exported from photoshop to Qrc
                              and using them in the program, I get
                              tons of
                              libpng warning: iCCP: known incorrect sRGB profile
                              libpng warning: iCCP: known incorrect sRGB profile
                              (one for each file..)
                              Which is pretty annoying.

                              No other tool I have that reads png have an issue with these files, only libpng.
                              Its photoshop 2015. Profile is correct for all tools I have that can use png profiles.

                              Can I somehow disable this warning ?
                              thanks

                              aghilproA Offline
                              aghilproA Offline
                              aghilpro
                              wrote on last edited by aghilpro
                              #17

                              @mrjj This Warning is about PNG formats and Qt, Irrelevant to @ztono code. Read more about PNG (Portable Network Graphics) https://en.wikipedia.org/wiki/Portable_Network_Graphics

                              PNG has many Formats some old, some not standard for Qt. see more History_and_development You need to use Standard format in Qt.

                              Answer To Your Problem: https://stackoverflow.com/questions/43374187/qt-open-a-jpg-file-with-warning-image-format-not-supported

                              "I know one thing; that I know nothing." - Socrates

                              mrjjM 1 Reply Last reply
                              0
                              • aghilproA aghilpro

                                @mrjj This Warning is about PNG formats and Qt, Irrelevant to @ztono code. Read more about PNG (Portable Network Graphics) https://en.wikipedia.org/wiki/Portable_Network_Graphics

                                PNG has many Formats some old, some not standard for Qt. see more History_and_development You need to use Standard format in Qt.

                                Answer To Your Problem: https://stackoverflow.com/questions/43374187/qt-open-a-jpg-file-with-warning-image-format-not-supported

                                mrjjM Offline
                                mrjjM Offline
                                mrjj
                                Lifetime Qt Champion
                                wrote on last edited by mrjj
                                #18

                                @aghilpro
                                Actually it turn out it was the color profile that photoshop put in the png file and
                                libpng didn't like it. Seems to have vanish in later Qt versions.

                                1 Reply Last reply
                                3
                                • _ Offline
                                  _ Offline
                                  __d4ve__
                                  wrote on last edited by
                                  #19

                                  Open with -> Photoshop -> File -> Save for web... -> Save..

                                  1 Reply Last reply
                                  0
                                  • S Offline
                                    S Offline
                                    seyed
                                    wrote on last edited by
                                    #20

                                    As a quick solution, you can fix that image using some optimisation utilities.
                                    On the MacOS, I successfully solved this problem using the ImageOptim.
                                    On other platforms, there is some similar tools such as the Trimage for Linux and the pinga for Windows, but I didn't test these.

                                    1 Reply Last reply
                                    0
                                    • D Offline
                                      D Offline
                                      drwa
                                      wrote on last edited by
                                      #21

                                      First of all, my image is displayed correctly, despite the warning.
                                      I fixed the warning by opening in "Snip & Sketch" Windows application and then, saving it again.

                                      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