Method init

plugins/single_plugins/invert.cpp:60–104

  public:
    void init() override
    {
        if (!wf::get_core().is_gles2())
        {
            const char *render_type =
                wf::get_core().is_vulkan() ? "vulkan" : (wf::get_core().is_pixman() ? "pixman" : "unknown");
            LOGE("invert: requires GLES2 support, but current renderer is ", render_type);
            return;
        }

        wf::option_wrapper_t<wf::activatorbinding_t> toggle_key{"invert/toggle"};

        hook = [=] (wf::auxilliary_buffer_t& source,
                    const wf::render_buffer_t& destination)
        {
            render(source, destination);
        };

        toggle_cb = [=] (auto)
        {
            if (!output->can_activate_plugin(&grab_interface))
            {
                return false;
            }

            if (active)
            {
                output->render->rem_post(&hook);
            } else
            {
                output->render->add_post(&hook);
            }

            active = !active;

            return true;
        };

        wf::gles::run_in_context([&]
        {
            program.set_simple(OpenGL::compile_program(vertex_shader, fragment_shader));
        });

        output->add_activator(toggle_key, &toggle_cb);
    }

    void render(wf::auxilliary_buffer_t& source, const wf::render_buffer_t& destination)
    {