wayland.h

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#pragma once
 
// standard includes
#include <bitset>
 
#ifdef SUNSHINE_BUILD_WAYLAND
  #include <linux-dmabuf-unstable-v1.h>
  #include <wlr-screencopy-unstable-v1.h>
  #include <xdg-output-unstable-v1.h>
#endif
 
// local includes
#include "graphics.h"
 
#ifdef SUNSHINE_BUILD_WAYLAND
 
namespace wl {
  using display_internal_t = util::safe_ptr<wl_display, wl_display_disconnect>;
 
  class frame_t {
  public:
    frame_t();
    void destroy();
 
    egl::surface_descriptor_t sd;
    std::optional<std::chrono::steady_clock::time_point> frame_timestamp;
  };
 
  class dmabuf_t {
  public:
    enum status_e {
      WAITING,  
      READY,  
      REINIT,  
    };
 
    dmabuf_t();
    ~dmabuf_t();
 
    dmabuf_t(dmabuf_t &&) = delete;
    dmabuf_t(const dmabuf_t &) = delete;
    dmabuf_t &operator=(const dmabuf_t &) = delete;
    dmabuf_t &operator=(dmabuf_t &&) = delete;
 
    void listen(zwlr_screencopy_manager_v1 *screencopy_manager, zwp_linux_dmabuf_v1 *dmabuf_interface, wl_output *output, bool blend_cursor = false);
    static void buffer_params_created(void *data, struct zwp_linux_buffer_params_v1 *params, struct wl_buffer *wl_buffer);
    static void buffer_params_failed(void *data, struct zwp_linux_buffer_params_v1 *params);
    void buffer(zwlr_screencopy_frame_v1 *frame, std::uint32_t format, std::uint32_t width, std::uint32_t height, std::uint32_t stride);
    void linux_dmabuf(zwlr_screencopy_frame_v1 *frame, std::uint32_t format, std::uint32_t width, std::uint32_t height);
    void buffer_done(zwlr_screencopy_frame_v1 *frame);
    void flags(zwlr_screencopy_frame_v1 *frame, std::uint32_t flags);
    void damage(zwlr_screencopy_frame_v1 *frame, std::uint32_t x, std::uint32_t y, std::uint32_t width, std::uint32_t height);
    void ready(zwlr_screencopy_frame_v1 *frame, std::uint32_t tv_sec_hi, std::uint32_t tv_sec_lo, std::uint32_t tv_nsec);
    void failed(zwlr_screencopy_frame_v1 *frame);
 
    frame_t *get_next_frame() {
      return current_frame == &frames[0] ? &frames[1] : &frames[0];
    }
 
    status_e status;
    std::array<frame_t, 2> frames;
    frame_t *current_frame;
    zwlr_screencopy_frame_v1_listener listener;
 
  private:
    bool init_gbm();
    void cleanup_gbm();
    void create_and_copy_dmabuf(zwlr_screencopy_frame_v1 *frame);
 
    zwp_linux_dmabuf_v1 *dmabuf_interface {nullptr};
 
    struct {
      bool supported {false};
      std::uint32_t format;
      std::uint32_t width;
      std::uint32_t height;
      std::uint32_t stride;
    } shm_info;
 
    struct {
      bool supported {false};
      std::uint32_t format;
      std::uint32_t width;
      std::uint32_t height;
    } dmabuf_info;
 
    struct gbm_device *gbm_device {nullptr};
    struct gbm_bo *current_bo {nullptr};
    struct wl_buffer *current_wl_buffer {nullptr};
    bool y_invert {false};
  };
 
  class monitor_t {
  public:
    explicit monitor_t(wl_output *output);
 
    monitor_t(monitor_t &&) = delete;
    monitor_t(const monitor_t &) = delete;
    monitor_t &operator=(const monitor_t &) = delete;
    monitor_t &operator=(monitor_t &&) = delete;
 
    void listen(zxdg_output_manager_v1 *output_manager);
    void xdg_name(zxdg_output_v1 *, const char *name);
    void xdg_description(zxdg_output_v1 *, const char *description);
    void xdg_position(zxdg_output_v1 *, std::int32_t x, std::int32_t y);
    void xdg_size(zxdg_output_v1 *, std::int32_t width, std::int32_t height);
 
    void xdg_done(zxdg_output_v1 *) {}
 
    void wl_geometry(wl_output *wl_output, std::int32_t x, std::int32_t y, std::int32_t physical_width, std::int32_t physical_height, std::int32_t subpixel, const char *make, const char *model, std::int32_t transform) {}
 
    void wl_mode(wl_output *wl_output, std::uint32_t flags, std::int32_t width, std::int32_t height, std::int32_t refresh);
 
    void wl_done(wl_output *wl_output) {}
 
    void wl_scale(wl_output *wl_output, std::int32_t factor) {}
 
    wl_output *output;
    std::string name;
    std::string description;
    platf::touch_port_t viewport;
    wl_output_listener wl_listener;
    zxdg_output_v1_listener xdg_listener;
  };
 
  class interface_t {
    struct bind_t {
      std::uint32_t id;
      std::uint32_t version;
    };
 
  public:
    enum interface_e {
      XDG_OUTPUT,  
      WLR_EXPORT_DMABUF,  
      LINUX_DMABUF,  
      MAX_INTERFACES,  
    };
 
    interface_t() noexcept;
 
    interface_t(interface_t &&) = delete;
    interface_t(const interface_t &) = delete;
    interface_t &operator=(const interface_t &) = delete;
    interface_t &operator=(interface_t &&) = delete;
 
    void listen(wl_registry *registry);
 
    bool operator[](interface_e bit) const {
      return interface[bit];
    }
 
    std::vector<std::unique_ptr<monitor_t>> monitors;
    zwlr_screencopy_manager_v1 *screencopy_manager {nullptr};
    zwp_linux_dmabuf_v1 *dmabuf_interface {nullptr};
    zxdg_output_manager_v1 *output_manager {nullptr};
 
  private:
    void add_interface(wl_registry *registry, std::uint32_t id, const char *interface, std::uint32_t version);
    void del_interface(wl_registry *registry, uint32_t id);
 
    std::bitset<MAX_INTERFACES> interface;
    wl_registry_listener listener;
  };
 
  class display_t {
  public:
    int init(const char *display_name = nullptr);
 
    // Roundtrip with Wayland connection
    void roundtrip();
 
    // Wait up to the timeout to read and dispatch new events
    bool dispatch(std::chrono::milliseconds timeout);
 
    // Get the registry associated with the display
    // No need to manually free the registry
    wl_registry *registry();
 
    inline display_internal_t::pointer get() {
      return display_internal.get();
    }
 
  private:
    display_internal_t display_internal;
  };
 
  std::vector<std::unique_ptr<monitor_t>> monitors(const char *display_name = nullptr);
  int init();
}  // namespace wl
#else
 
struct wl_output;
struct zxdg_output_manager_v1;
 
namespace wl {
  class monitor_t {
  public:
    monitor_t(wl_output *output);
 
    monitor_t(monitor_t &&) = delete;
    monitor_t(const monitor_t &) = delete;
    monitor_t &operator=(const monitor_t &) = delete;
    monitor_t &operator=(monitor_t &&) = delete;
 
    void listen(zxdg_output_manager_v1 *output_manager);
 
    wl_output *output;
    std::string name;
    std::string description;
    platf::touch_port_t viewport;
  };
 
  inline std::vector<std::unique_ptr<monitor_t>> monitors(const char *display_name = nullptr) {
    return {};
  }
 
  inline int init() {
    return -1;
  }
}  // namespace wl
#endif