Function dpf_webview_start

distrho/extra/WebViewImpl.cpp:1949–2055

}

int dpf_webview_start(const int argc, char* argv[])
{
    if (argc != 3)
    {
        d_stderr("WebView entry point, nothing to see here! ;)");
        return 1;
    }

    d_stdout("starting... %d '%s' '%s'", argc, argv[1], argv[2]);

    uselocale(newlocale(LC_NUMERIC_MASK, "C", nullptr));

    Display* const display = XOpenDisplay(nullptr);
    DISTRHO_SAFE_ASSERT_RETURN(display != nullptr, 1);

    const char* const shmname = argv[2];
    const int shmfd = shm_open(shmname, O_RDWR, 0);
    if (shmfd < 0)
    {
        d_stderr("shm_open failed: %s", std::strerror(errno));
        return 1;
    }

    WebViewRingBuffer* const shmptr = static_cast<WebViewRingBuffer*>(mmap(nullptr,
                                                                           sizeof(WebViewRingBuffer),
                                                                           PROT_READ|PROT_WRITE,
                                                                           MAP_SHARED,
                                                                           shmfd, 0));
    if (shmptr == nullptr || shmptr == nullptr)
    {
        d_stderr("mmap failed: %s", std::strerror(errno));
        close(shmfd);
        return 1;
    }

    RingBufferControl<WebViewSharedBuffer> rbctrl;
    rbctrl.setRingBuffer(&shmptr->client, false);

    // fetch initial data
    bool hasInitialData = false;
    Window winId = 0;
    uint width = 0, height = 0;
    double scaleFactor = 0;
    int x = 0, y = 0;
    char* url = nullptr;
    char* initJS = nullptr;

    while (shmptr->valid && webview_timedwait(&shmptr->client.sem))
    {
        if (rbctrl.isDataAvailableForReading())
        {
            DISTRHO_SAFE_ASSERT_RETURN(rbctrl.readUInt() == kWebViewMessageInitData, 1);

            hasInitialData = running = true;
            winId = rbctrl.readULong();
            width = rbctrl.readUInt();
            height = rbctrl.readUInt();
            scaleFactor = rbctrl.readDouble();