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Qt GLFW and GLEW setup

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  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #4

    Qt does not provide a custom implementation of OpenGL.

    Please take a look at the Qt Gui module and what it offers for OpenGL handling.

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

    B 1 Reply Last reply
    1
    • SGaistS SGaist

      Qt does not provide a custom implementation of OpenGL.

      Please take a look at the Qt Gui module and what it offers for OpenGL handling.

      B Offline
      B Offline
      bence
      wrote on last edited by
      #5

      @SGaist

      But I can add libary to Qt, and GLFW is a libary

      I created a project, right click on it, add libaries, internal libary, include the path to C:\glfw, and it does not allow me to push to the next button

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

        Sure you can, but you might be adding unnecessary dependencies.

        Is the library compiled ?
        Does the architecture match the one you use for Qt ?
        Which compiler was used ?

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

        1 Reply Last reply
        0
        • B Offline
          B Offline
          bence
          wrote on last edited by
          #7

          I do not comailed the libary.
          mingw73_64

          The other thing that I have tried is that
          .pro

          TEMPLATE = app
          CONFIG += console c++11
          CONFIG -= app_bundle
          CONFIG -= qt
          
          INCLUDEPATH += "C:\glfw\include\GLFW"
          
          SOURCES += \
                  main.cpp
          
          #include <iostream>
          #include <glfw3.h>
          
          using namespace std;
          
          int main() {
          
              cout << "Hello World!" << endl;
              glfwInit();
              return 0;
          }
          

          C:\files\C++\file\main.cpp:9: error: undefined reference to `glfwInit'

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

            You are not linking the library.

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

            B 2 Replies Last reply
            1
            • SGaistS SGaist

              You are not linking the library.

              B Offline
              B Offline
              bence
              wrote on last edited by
              #9

              @SGaist

              Maybe I am lame but I can't find a .lib file in GLFW folder file

              In the GLEW folder C:\glew\lib\Release\x64 there is two .lib file but in the GLFW folder I cannot find any

              1 Reply Last reply
              0
              • SGaistS SGaist

                You are not linking the library.

                B Offline
                B Offline
                bence
                wrote on last edited by
                #10

                @SGaist

                link there is a pre compailed binary for visual studio

                .pro file

                TEMPLATE = app
                CONFIG += console c++11
                CONFIG -= app_bundle
                CONFIG -= qt
                
                INCLUDEPATH += "C:\glfw\include\GLFW"
                
                LIBS += -L"C:\glfw\lib-vc2019" -glfw3
                
                SOURCES += \
                        main.cpp
                

                main.cpp file

                #include <iostream>
                #include <glfw3.h>
                
                using namespace std;
                
                int main() {
                    cout << "Hello World!" << endl;
                    glfwInit();
                    return 0;
                }
                

                error: unrecognized debug output level 'lfw3'

                JonBJ 1 Reply Last reply
                0
                • B bence

                  @SGaist

                  link there is a pre compailed binary for visual studio

                  .pro file

                  TEMPLATE = app
                  CONFIG += console c++11
                  CONFIG -= app_bundle
                  CONFIG -= qt
                  
                  INCLUDEPATH += "C:\glfw\include\GLFW"
                  
                  LIBS += -L"C:\glfw\lib-vc2019" -glfw3
                  
                  SOURCES += \
                          main.cpp
                  

                  main.cpp file

                  #include <iostream>
                  #include <glfw3.h>
                  
                  using namespace std;
                  
                  int main() {
                      cout << "Hello World!" << endl;
                      glfwInit();
                      return 0;
                  }
                  

                  error: unrecognized debug output level 'lfw3'

                  JonBJ Offline
                  JonBJ Offline
                  JonB
                  wrote on last edited by JonB
                  #11

                  @bence said in Qt GLFW and GLEW setup:

                  LIBS += -L"C:\glfw\lib-vc2019" -glfw3

                  error: unrecognized debug output level 'lfw3'

                  Where do yo u get the -glfw3 from? For gcc, for example, the -g is a compiler debugging flag, which would give your error.

                  B 1 Reply Last reply
                  0
                  • JonBJ JonB

                    @bence said in Qt GLFW and GLEW setup:

                    LIBS += -L"C:\glfw\lib-vc2019" -glfw3

                    error: unrecognized debug output level 'lfw3'

                    Where do yo u get the -glfw3 from? For gcc, for example, the -g is a compiler debugging flag, which would give your error.

                    B Offline
                    B Offline
                    bence
                    wrote on last edited by bence
                    #12

                    @JonB now I know that waht was the problem I have to use

                    LIBS += -L"C:\glfw\lib-vc2019" -lglfw3
                    

                    But this time I get 120 issues

                    1.PNG

                    2.PNG

                    I assume that I cannot use GLFW Visual Studio precompile libary. But I cannot know what should I do.

                    JonBJ 1 Reply Last reply
                    0
                    • B bence

                      @JonB now I know that waht was the problem I have to use

                      LIBS += -L"C:\glfw\lib-vc2019" -lglfw3
                      

                      But this time I get 120 issues

                      1.PNG

                      2.PNG

                      I assume that I cannot use GLFW Visual Studio precompile libary. But I cannot know what should I do.

                      JonBJ Offline
                      JonBJ Offline
                      JonB
                      wrote on last edited by
                      #13

                      @bence
                      If you only have libraries for VS/MSVC I believe you have to use that tool chain.

                      B 1 Reply Last reply
                      0
                      • JonBJ JonB

                        @bence
                        If you only have libraries for VS/MSVC I believe you have to use that tool chain.

                        B Offline
                        B Offline
                        bence
                        wrote on last edited by bence
                        #14

                        @JonB

                        I do not install VS to my PC.

                        I am sure that there is other way to do that.

                        I believe Qt is a excellent platform so there have to be a way to use original OpenGL

                        If you have any idea who could I use the original OpenGL in Qt I would really appriciate it.

                        1 Reply Last reply
                        0
                        • SGaistS Offline
                          SGaistS Offline
                          SGaist
                          Lifetime Qt Champion
                          wrote on last edited by
                          #15

                          Your issue is not related to Qt. You are trying to mix and match C++ libraries built with two different compilers. You can't use C++ libraries built with Visual Studio when using MinGW and it's the same the other way around.

                          As I already explained Qt does not implement a custom version of OpenGL. You already have access the functions. You are currently making your life more complicated than need be.

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

                          B 1 Reply Last reply
                          1
                          • SGaistS SGaist

                            Your issue is not related to Qt. You are trying to mix and match C++ libraries built with two different compilers. You can't use C++ libraries built with Visual Studio when using MinGW and it's the same the other way around.

                            As I already explained Qt does not implement a custom version of OpenGL. You already have access the functions. You are currently making your life more complicated than need be.

                            B Offline
                            B Offline
                            bence
                            wrote on last edited by bence
                            #16

                            @SGaist

                            Simpley I do not want to install Visual Studio to use the original OpenGL that why I asked who could I do that.

                            This youtube is out of date he istall the OpenGL but the current version is not the same
                            Because he can install it there have to be a way that I can use it.

                            1 Reply Last reply
                            0
                            • SGaistS Offline
                              SGaistS Offline
                              SGaist
                              Lifetime Qt Champion
                              wrote on last edited by
                              #17

                              The page you linked provides libraries for a lot of compilers including MinGW 32 and 64 bit.

                              If you can't use any of them, the compile the library yourself.

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

                              B 1 Reply Last reply
                              1
                              • SGaistS SGaist

                                The page you linked provides libraries for a lot of compilers including MinGW 32 and 64 bit.

                                If you can't use any of them, the compile the library yourself.

                                B Offline
                                B Offline
                                bence
                                wrote on last edited by
                                #18

                                @SGaist
                                I right click on the project and add the whole GLFW folder.

                                .pro file

                                TEMPLATE = app
                                CONFIG += console c++11
                                CONFIG -= app_bundle
                                CONFIG -= qt
                                
                                INCLUDEPATH += "C:\glfw\include"
                                INCLUDEPATH += "C:\glfw\deps"
                                
                                
                                SOURCES += \
                                        glfw/deps/getopt.c \
                                        glfw/deps/glad_gl.c \
                                        glfw/deps/glad_vulkan.c \
                                        glfw/deps/tinycthread.c \
                                        glfw/examples/boing.c \
                                        glfw/examples/gears.c \
                                        glfw/examples/heightmap.c \
                                        glfw/examples/offscreen.c \
                                        glfw/examples/particles.c \
                                        glfw/examples/sharing.c \
                                        glfw/examples/simple.c \
                                        glfw/examples/splitview.c \
                                        glfw/examples/wave.c \
                                        glfw/src/cocoa_time.c \
                                        glfw/src/context.c \
                                        glfw/src/egl_context.c \
                                        glfw/src/glx_context.c \
                                        glfw/src/init.c \
                                        glfw/src/input.c \
                                        glfw/src/linux_joystick.c \
                                        glfw/src/monitor.c \
                                        glfw/src/null_init.c \
                                        glfw/src/null_joystick.c \
                                        glfw/src/null_monitor.c \
                                        glfw/src/null_window.c \
                                        glfw/src/osmesa_context.c \
                                        glfw/src/posix_thread.c \
                                        glfw/src/posix_time.c \
                                        glfw/src/vulkan.c \
                                        glfw/src/wgl_context.c \
                                        glfw/src/win32_init.c \
                                        glfw/src/win32_joystick.c \
                                        glfw/src/win32_monitor.c \
                                        glfw/src/win32_thread.c \
                                        glfw/src/win32_time.c \
                                        glfw/src/win32_window.c \
                                        glfw/src/window.c \
                                        glfw/src/wl_init.c \
                                        glfw/src/wl_monitor.c \
                                        glfw/src/wl_window.c \
                                        glfw/src/x11_init.c \
                                        glfw/src/x11_monitor.c \
                                        glfw/src/x11_window.c \
                                        glfw/src/xkb_unicode.c \
                                        main.cpp
                                
                                DISTFILES += \
                                    glfw/CMake/GenerateMappings.cmake \
                                    glfw/CMake/MacOSXBundleInfo.plist.in \
                                    glfw/CMake/i686-w64-mingw32-clang.cmake \
                                    glfw/CMake/i686-w64-mingw32.cmake \
                                    glfw/CMake/modules/FindEpollShim.cmake \
                                    glfw/CMake/modules/FindOSMesa.cmake \
                                    glfw/CMake/modules/FindWaylandProtocols.cmake \
                                    glfw/CMake/modules/FindXKBCommon.cmake \
                                    glfw/CMake/x86_64-w64-mingw32-clang.cmake \
                                    glfw/CMake/x86_64-w64-mingw32.cmake \
                                    glfw/CMakeLists.txt \
                                    glfw/cmake_uninstall.cmake.in \
                                    glfw/examples/CMakeLists.txt \
                                    glfw/examples/glfw.icns \
                                    glfw/examples/glfw.ico \
                                    glfw/examples/glfw.rc \
                                    glfw/src/CMakeLists.txt \
                                    glfw/src/cocoa_init.m \
                                    glfw/src/cocoa_joystick.m \
                                    glfw/src/cocoa_monitor.m \
                                    glfw/src/cocoa_window.m \
                                    glfw/src/glfw3.pc.in \
                                    glfw/src/glfw3Config.cmake.in \
                                    glfw/src/glfw_config.h.in \
                                    glfw/src/mappings.h.in \
                                    glfw/src/nsgl_context.m
                                
                                HEADERS += \
                                    glfw/deps/getopt.h \
                                    glfw/deps/glad/gl.h \
                                    glfw/deps/glad/khrplatform.h \
                                    glfw/deps/glad/vk_platform.h \
                                    glfw/deps/glad/vulkan.h \
                                    glfw/deps/linmath.h \
                                    glfw/deps/mingw/_mingw_dxhelper.h \
                                    glfw/deps/mingw/dinput.h \
                                    glfw/deps/mingw/xinput.h \
                                    glfw/deps/nuklear.h \
                                    glfw/deps/nuklear_glfw_gl2.h \
                                    glfw/deps/stb_image_write.h \
                                    glfw/deps/tinycthread.h \
                                    glfw/deps/vs2008/stdint.h \
                                    glfw/include/GLFW/glfw3.h \
                                    glfw/include/GLFW/glfw3native.h \
                                    glfw/src/cocoa_joystick.h \
                                    glfw/src/cocoa_platform.h \
                                    glfw/src/egl_context.h \
                                    glfw/src/glx_context.h \
                                    glfw/src/internal.h \
                                    glfw/src/linux_joystick.h \
                                    glfw/src/mappings.h \
                                    glfw/src/nsgl_context.h \
                                    glfw/src/null_joystick.h \
                                    glfw/src/null_platform.h \
                                    glfw/src/osmesa_context.h \
                                    glfw/src/posix_thread.h \
                                    glfw/src/posix_time.h \
                                    glfw/src/wgl_context.h \
                                    glfw/src/win32_joystick.h \
                                    glfw/src/win32_platform.h \
                                    glfw/src/wl_platform.h \
                                    glfw/src/x11_platform.h \
                                    glfw/src/xkb_unicode.h
                                

                                The Qt recognize the function so everything is good. I click on rebuilt all projects

                                But when I try to built the program I get the following error:

                                1.PNG

                                And when I push the run button I get the a loads of errors

                                2.PNG

                                I use the code from link here.

                                1 Reply Last reply
                                0
                                • SGaistS Offline
                                  SGaistS Offline
                                  SGaist
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #19

                                  GLFW already provides a mean to build their library. Use it.

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

                                  B 1 Reply Last reply
                                  0
                                  • SGaistS SGaist

                                    GLFW already provides a mean to build their library. Use it.

                                    B Offline
                                    B Offline
                                    bence
                                    wrote on last edited by
                                    #20

                                    @SGaist

                                    And who to built it. I just find the way to use it in VS.

                                    1 Reply Last reply
                                    0
                                    • SGaistS Offline
                                      SGaistS Offline
                                      SGaist
                                      Lifetime Qt Champion
                                      wrote on last edited by
                                      #21

                                      Please, read the documentation of the libraries you want to use. It's explained right in their website.

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

                                      B 2 Replies Last reply
                                      1
                                      • SGaistS SGaist

                                        Please, read the documentation of the libraries you want to use. It's explained right in their website.

                                        B Offline
                                        B Offline
                                        bence
                                        wrote on last edited by
                                        #22

                                        @SGaist

                                        just another think link somebody says

                                        LIBS += -LC:\Qt\5.13.0\mingw73_64\lib\libQt5OpenGL.a -lopengl64
                                        

                                        It should work but it does not work for me

                                        1 Reply Last reply
                                        0
                                        • SGaistS SGaist

                                          Please, read the documentation of the libraries you want to use. It's explained right in their website.

                                          B Offline
                                          B Offline
                                          bence
                                          wrote on last edited by
                                          #23

                                          @SGaist

                                          Other thing is that at glfw\lib-mingw-w64 there is 3 files

                                          glfw3.dll
                                          libglfw3.a
                                          libglfw3dll.a

                                          these are libarys so I assume that I could include that so right click add external libary I add: libglfw3.a

                                          .pro file

                                          TEMPLATE = app
                                          CONFIG += console c++11
                                          CONFIG -= app_bundle
                                          CONFIG -= qt
                                          
                                          SOURCES += main.cpp
                                          
                                          
                                          INCLUDEPATH += C:\glfw\include
                                          
                                          win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../../../../glfw/lib-mingw-w64/ -lglfw3
                                          else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../../../../glfw/lib-mingw-w64/ -lglfw3d
                                          else:unix: LIBS += -L$$PWD/../../../../glfw/lib-mingw-w64/ -lglfw3
                                          
                                          INCLUDEPATH += $$PWD/../../../../glfw/lib-mingw-w64
                                          DEPENDPATH += $$PWD/../../../../glfw/lib-mingw-w64
                                          

                                          So it looks good but when I try to build the program I get errors

                                          :-1: error: cannot find -lglfw3d
                                          :-1: error: collect2.exe: error: ld returned 1 exit status
                                          
                                          JonBJ 1 Reply Last reply
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