Missing XDG decoration results in missing window system controls

[Demonese]

System:

• OS Ubuntu 22.04.1 LTS
• GNOME 42.4
• Window System Wayland

Code

#include <assert.h>
#include <stdio.h>
#include "glad/gl.h"
#include <GLFW/glfw3.h>

void error_callback(int code, const char* description)
{
    printf("[E] [glfw] (code=%d) %s\n", code, description);
}

int main()
{
    GLFWwindow* window = NULL;

    glfwSetErrorCallback(error_callback);

    /* Initialize the library */
    if (!glfwInit())
        return -1;

    //glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);

    /* Create a windowed mode window and its OpenGL context */
    
    window = glfwCreateWindow(640, 480, "Hello World", NULL, NULL);
    if (!window)
    {
        glfwTerminate();
        return -1;
    }

    glfwMakeContextCurrent(window);

    if (!gladLoadGL((GLADloadfunc)glfwGetProcAddress))
    {
        printf("[E] [glad] gladLoadGL failed\n");
        return -1;
    }
    printf("[I] [gl]\n    Vendor: %s\n    Renderer: %s\n    Version: %s\n",
        glGetString(GL_VENDOR), glGetString(GL_RENDERER), glGetString(GL_VERSION));

    glfwShowWindow(window);

    /* Loop until the user closes the window */
    int tick = 0;
    while (!glfwWindowShouldClose(window))
    {
        /* Poll for and process events */
        glfwPollEvents();

        //printf("[I] update: %d\n", tick);
        tick += 1;

        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
        glClear(GL_COLOR_BUFFER_BIT);

        glfwSwapInterval(1);
        glfwSwapBuffers(window);
    }
    
    glfwDestroyWindow(window);
    glfwTerminate();
    return 0;
}

ScreenShot:

Wayland Global:

[I] [wayland] global wl_compositor (v5)
[I] [wayland] global wl_drm (v2)
[I] [wayland] global wl_shm (v1)
[I] [wayland] global wl_output (v2)
[I] [wayland] global zxdg_output_manager_v1 (v3)
[I] [wayland] global wl_data_device_manager (v3)
[I] [wayland] global zwp_primary_selection_device_manager_v1 (v1)
[I] [wayland] global gtk_primary_selection_device_manager (v1)
[I] [wayland] global wl_subcompositor (v1)
[I] [wayland] global xdg_wm_base (v4)
[I] [wayland] global zxdg_shell_v6 (v1)
[I] [wayland] global gtk_shell1 (v5)
[I] [wayland] global wp_viewporter (v1)
[I] [wayland] global zwp_pointer_gestures_v1 (v3)
[I] [wayland] global zwp_tablet_manager_v2 (v1)
[I] [wayland] global wl_seat (v5)
[I] [wayland] global zwp_relative_pointer_manager_v1 (v1)
[I] [wayland] global zwp_pointer_constraints_v1 (v1)
[I] [wayland] global zxdg_exporter_v1 (v1)
[I] [wayland] global zxdg_importer_v1 (v1)
[I] [wayland] global zwp_linux_dmabuf_v1 (v4)
[I] [wayland] global zwp_keyboard_shortcuts_inhibit_manager_v1 (v1)
[I] [wayland] global zwp_text_input_manager_v3 (v1)
[I] [wayland] global wp_presentation (v1)
[I] [wayland] global xdg_activation_v1 (v1)

[sauron65]

GNOME doesn't support XDG decoration. There is an open pull request for implementing window decoration on desktop environments that don't support it via libdecor

[gracicot]

Yes. Libdecor is the solution for decorations in Wayland. The library is lightweight and uses native decorations on GNOME, plasma and wlroots based compositors. It uses either xdg-decoration protocol if available or draw the decoration if required.

[elmindreda]

Support for libdecor has now been added with #2285 and was included in the latest stable release.