Minimal WPE launcher using libcogcore

minicog.c

/*
 * SPDX-License-Identifier: MIT
 *
 * cc -o minicog minicog.c $(pkg-config wpe-webkit-1.1 cogcore --cflags --libs)
 */

#include <cog/cog.h>

static const char *s_starturl = NULL;

static WebKitWebView*
on_create_view(CogShell *shell, CogPlatform *platform)
{
    g_autoptr(GError) error = NULL;
    WebKitWebViewBackend *view_backend = cog_platform_get_view_backend(platform, NULL, &error);
    if (!view_backend)
        g_error("Cannot obtain view backend: %s", error->message);

    g_autoptr(WebKitWebView) web_view =
        g_object_new(WEBKIT_TYPE_WEB_VIEW,
                     "settings", cog_shell_get_web_settings(shell),
                     "web-context", cog_shell_get_web_context(shell),
                     "backend", view_backend,
                     NULL);
    cog_platform_init_web_view(platform, web_view);
    webkit_web_view_load_uri(web_view, s_starturl);
    return g_steal_pointer(&web_view);
}

int
main(int argc, char *argv[])
{
    g_set_application_name("minicog");

    if (argc != 2 && argc != 3) {
        g_printerr("Usage: %s [URL [platform]]\n", argv[0]);
        return EXIT_FAILURE;
    }

    g_autoptr(GError) error = NULL;
    if (!(s_starturl = cog_uri_guess_from_user_input(argv[1], TRUE, &error)))
        g_error("Invalid URL '%s': %s", argv[1], error->message);

    cog_modules_add_directory(COG_MODULEDIR);

    g_autoptr(GApplication) app = g_application_new(NULL, G_APPLICATION_DEFAULT_FLAGS);
    g_autoptr(CogShell) shell = cog_shell_new("minicog", FALSE);
    g_autoptr(CogPlatform) platform =
        cog_platform_new((argc == 3) ? argv[2] : g_getenv("COG_PLATFORM"), &error);
    if (!platform)
        g_error("Cannot create platform: %s", error->message);

    if (!cog_platform_setup(platform, shell, "", &error))
        g_error("Cannot setup platform: %s\n", error->message);

    g_signal_connect(shell, "create-view", G_CALLBACK(on_create_view), platform);
    g_signal_connect_swapped(app, "shutdown", G_CALLBACK(cog_shell_shutdown), shell);
    g_signal_connect_swapped(app, "startup", G_CALLBACK(cog_shell_startup), shell);
    g_signal_connect(app, "activate", G_CALLBACK(g_application_hold), NULL);

    return g_application_run(app, 1, argv);
}

Hello,

Running this on a raspberry pi 3b+ (./app index.html drm), with a yocto build image with Mesa VC4 driver, DRM and wpebackend-fdo, I only get the mouse cursor; the web page doesn't show on the framebuffer.

If I run cog -P index.html it works tho. Any idea?

I'm using wpewebkit-2.0