path: root/src/compositor.h

/*
 * Copyright © 2008-2011 Kristian Høgsberg
 * Copyright © 2012 Collabora, Ltd.
 *
 * Permission to use, copy, modify, distribute, and sell this software and
 * its documentation for any purpose is hereby granted without fee, provided
 * that the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the name of the copyright holders not be used in
 * advertising or publicity pertaining to distribution of the software
 * without specific, written prior permission.  The copyright holders make
 * no representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 *
 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
 * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef _WAYLAND_SYSTEM_COMPOSITOR_H_
#define _WAYLAND_SYSTEM_COMPOSITOR_H_

#include <pixman.h>
#include <xkbcommon/xkbcommon.h>
#include <wayland-server.h>

#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>

/* #include "version.h" */
#include "matrix.h"
#include "config-parser.h"

#define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])

#define container_of(ptr, type, member) ({              \
    const __typeof__( ((type *)0)->member ) *__mptr = (ptr);    \
    (type *)( (char *)__mptr - offsetof(type,member) );})

struct weston_transform {
    struct weston_matrix matrix;
    struct wl_list link;
};

struct weston_surface;
struct shell_surface;
struct weston_seat;
struct weston_output;
struct input_method;

enum weston_keyboard_modifier {
    MODIFIER_CTRL = (1 << 0),
    MODIFIER_ALT = (1 << 1),
    MODIFIER_SUPER = (1 << 2),
    MODIFIER_SHIFT = (1 << 3),
};

enum weston_led {
    LED_NUM_LOCK = (1 << 0),
    LED_CAPS_LOCK = (1 << 1),
    LED_SCROLL_LOCK = (1 << 2),
};

struct weston_mode {
    uint32_t flags;
    int32_t width, height;
    uint32_t refresh;
    struct wl_list link;
};

struct weston_shell_client {
    void (*send_configure)(struct weston_surface *surface,
                   uint32_t edges, int32_t width, int32_t height);
};

struct weston_shell_interface {
    void *shell;            /* either desktop or tablet */

    struct shell_surface *(*create_shell_surface)(void *shell,
                              struct weston_surface *surface,
                              const struct weston_shell_client *client);

    void (*set_toplevel)(struct shell_surface *shsurf);

    void (*set_transient)(struct shell_surface *shsurf,
                  struct weston_surface *parent,
                  int x, int y, uint32_t flags);
    int (*move)(struct shell_surface *shsurf, struct weston_seat *ws);
    int (*resize)(struct shell_surface *shsurf,
              struct weston_seat *ws, uint32_t edges);

};

struct weston_border {
    int32_t left, right, top, bottom;
};

struct weston_animation {
    void (*frame)(struct weston_animation *animation,
              struct weston_output *output, uint32_t msecs);
    int frame_counter;
    struct wl_list link;
};

struct weston_spring {
    double k;
    double friction;
    double current;
    double target;
    double previous;
    uint32_t timestamp;
};

enum {
    ZOOM_FOCUS_POINTER,
    ZOOM_FOCUS_TEXT
};

struct weston_fixed_point {
    wl_fixed_t x, y;
};

struct weston_output_zoom {
    int active;
    uint32_t type;
    float increment;
    float level;
    float max_level;
    float trans_x, trans_y;
    struct weston_animation animation_z;
    struct weston_spring spring_z;
    struct weston_animation animation_xy;
    struct weston_spring spring_xy;
    struct weston_fixed_point from;
    struct weston_fixed_point to;
    struct weston_fixed_point current;
    struct weston_fixed_point text_cursor;
};

/* bit compatible with drm definitions. */
enum dpms_enum {
    WESTON_DPMS_ON,
    WESTON_DPMS_STANDBY,
    WESTON_DPMS_SUSPEND,
    WESTON_DPMS_OFF
};

struct weston_output {
    uint32_t id;

    EGLSurface egl_surface;
    struct wl_list link;
    struct wl_list resource_list;
    struct wl_global *global;
    struct weston_compositor *compositor;
    struct weston_matrix matrix;
    struct wl_list animation_list;
    int32_t x, y, width, height;
    int32_t mm_width, mm_height;
    struct weston_border border;
    pixman_region32_t region;
    int current_buffer;
    pixman_region32_t buffer_damage[2];
    int repaint_needed;
    int repaint_scheduled;
    struct weston_output_zoom zoom;
    int dirty;
    struct wl_signal frame_signal;
    uint32_t frame_time;
    int disable_planes;

    char *make, *model;
    uint32_t subpixel;
    uint32_t transform;
    
    struct weston_mode *current;
    struct weston_mode *origin;
    struct wl_list mode_list;

    void (*repaint)(struct weston_output *output,
            pixman_region32_t *damage);
    void (*destroy)(struct weston_output *output);
    void (*assign_planes)(struct weston_output *output);
    int (*switch_mode)(struct weston_output *output, struct weston_mode *mode);

    /* backlight values are on 0-255 range, where higher is brighter */
    uint32_t backlight_current;
    void (*set_backlight)(struct weston_output *output, uint32_t value);
    void (*set_dpms)(struct weston_output *output, enum dpms_enum level);
};

struct weston_xkb_info {
    struct xkb_keymap *keymap;
    int keymap_fd;
    size_t keymap_size;
    char *keymap_area;
    xkb_mod_index_t shift_mod;
    xkb_mod_index_t caps_mod;
    xkb_mod_index_t ctrl_mod;
    xkb_mod_index_t alt_mod;
    xkb_mod_index_t mod2_mod;
    xkb_mod_index_t mod3_mod;
    xkb_mod_index_t super_mod;
    xkb_mod_index_t mod5_mod;
    xkb_led_index_t num_led;
    xkb_led_index_t caps_led;
    xkb_led_index_t scroll_led;
};

struct weston_seat {
    struct wl_seat seat;
    struct wl_pointer pointer;
    int has_pointer;
    struct wl_keyboard keyboard;
    int has_keyboard;
    struct wl_touch touch;
    int has_touch;

    struct weston_compositor *compositor;
    struct weston_surface *sprite;
    struct wl_listener sprite_destroy_listener;
    struct weston_surface *drag_surface;
    struct wl_listener drag_surface_destroy_listener;
    int32_t hotspot_x, hotspot_y;
    struct wl_list link;
    enum weston_keyboard_modifier modifier_state;
    struct wl_surface *saved_kbd_focus;
    struct wl_listener saved_kbd_focus_listener;

    uint32_t num_tp;

    struct wl_listener new_drag_icon_listener;

    void (*led_update)(struct weston_seat *ws, enum weston_led leds);

    struct weston_xkb_info xkb_info;
    struct {
        struct xkb_state *state;
        enum weston_led leds;
    } xkb_state;

    struct input_method *input_method;
};

struct weston_shader {
    GLuint program;
    GLuint vertex_shader, fragment_shader;
    GLint proj_uniform;
    GLint tex_uniforms[3];
    GLint alpha_uniform;
    GLint color_uniform;
};

enum {
    WESTON_COMPOSITOR_ACTIVE,
    WESTON_COMPOSITOR_IDLE,     /* shell->unlock called on activity */
    WESTON_COMPOSITOR_SLEEPING  /* no rendering, no frame events */
};

struct weston_layer {
    struct wl_list surface_list;
    struct wl_list link;
};

struct weston_plane {
    pixman_region32_t damage;
    pixman_region32_t opaque;
    int32_t x, y;
};

struct weston_renderer {
    void (*repaint_output)(struct weston_output *output,
                   pixman_region32_t *output_damage);
    void (*flush_damage)(struct weston_surface *surface);
    void (*attach)(struct weston_surface *es, struct wl_buffer *buffer);
    void (*destroy_surface)(struct weston_surface *surface);
};

struct weston_compositor {
    struct wl_signal destroy_signal;

    EGLDisplay egl_display;
    EGLContext egl_context;
    EGLConfig egl_config;
    struct weston_shader texture_shader_rgba;
    struct weston_shader texture_shader_rgbx;
    struct weston_shader texture_shader_egl_external;
    struct weston_shader texture_shader_y_uv;
    struct weston_shader texture_shader_y_u_v;
    struct weston_shader texture_shader_y_xuxv;
    struct weston_shader solid_shader;
    struct weston_shader *current_shader;
    struct wl_display *wl_display;
    struct weston_shell_interface shell_interface;

    struct wl_signal activate_signal;
    struct wl_signal kill_signal;
    struct wl_signal lock_signal;
    struct wl_signal unlock_signal;

    struct wl_signal show_input_panel_signal;
    struct wl_signal hide_input_panel_signal;

    struct wl_event_loop *input_loop;
    struct wl_event_source *input_loop_source;

    struct weston_layer fade_layer;
    struct weston_layer cursor_layer;

    struct wl_list output_list;
    struct wl_list seat_list;
    struct wl_list layer_list;
    struct wl_list surface_list;
    struct wl_list key_binding_list;
    struct wl_list button_binding_list;
    struct wl_list axis_binding_list;
    struct {
        struct weston_spring spring;
        struct weston_animation animation;
        struct weston_surface *surface;
    } fade;

    uint32_t state;
    struct wl_event_source *idle_source;
    uint32_t idle_inhibit;
    int option_idle_time;       /* default timeout, s */
    int idle_time;          /* effective timeout, s */

    /* Repaint state. */
    struct wl_array vertices;
    struct wl_array indices; /* only used in compositor-wayland */
    struct wl_array vtxcnt;
    struct weston_plane primary_plane;
    int fan_debug;

    uint32_t focus;

    struct weston_renderer *renderer;

    PFNGLEGLIMAGETARGETRENDERBUFFERSTORAGEOESPROC
        image_target_renderbuffer_storage;
    PFNGLEGLIMAGETARGETTEXTURE2DOESPROC image_target_texture_2d;
    PFNEGLCREATEIMAGEKHRPROC create_image;
    PFNEGLDESTROYIMAGEKHRPROC destroy_image;

    int has_unpack_subimage;
    GLenum read_format;

    PFNEGLBINDWAYLANDDISPLAYWL bind_display;
    PFNEGLUNBINDWAYLANDDISPLAYWL unbind_display;
    PFNEGLQUERYWAYLANDBUFFERWL query_buffer;
    int has_bind_display;

    void (*destroy)(struct weston_compositor *ec);
    void (*restore)(struct weston_compositor *ec);
    int (*authenticate)(struct weston_compositor *c, uint32_t id);

    void (*ping_handler)(struct weston_surface *surface, uint32_t serial);

    int launcher_sock;

    uint32_t output_id_pool;

    struct xkb_rule_names xkb_names;
    struct xkb_context *xkb_context;
    struct weston_xkb_info xkb_info;
};

struct weston_region {
    struct wl_resource resource;
    pixman_region32_t region;
};

/* Using weston_surface transformations
 *
 * To add a transformation to a surface, create a struct weston_transform, and
 * add it to the list surface->geometry.transformation_list. Whenever you
 * change the list, anything under surface->geometry, or anything in the
 * weston_transforms linked into the list, you must set
 * surface->geometry.dirty = 1.
 *
 * The order in the list defines the order of transformations. Let the list
 * contain the transformation matrices M1, ..., Mn as head to tail. The
 * transformation is applied to surface-local coordinate vector p as
 *    P = Mn * ... * M2 * M1 * p
 * to produce the global coordinate vector P. The total transform
 *    Mn * ... * M2 * M1
 * is cached in surface->transform.matrix, and the inverse of it in
 * surface->transform.inverse.
 *
 * The list always contains surface->transform.position transformation, which
 * is the translation by surface->geometry.x and y.
 *
 * If you want to apply a transformation in local coordinates, add your
 * weston_transform to the head of the list. If you want to apply a
 * transformation in global coordinates, add it to the tail of the list.
 */

struct weston_surface {
    struct wl_surface surface;
    struct weston_compositor *compositor;
    GLuint textures[3];
    int num_textures;
    pixman_region32_t clip;
    pixman_region32_t damage;
    pixman_region32_t opaque;
    pixman_region32_t input;
    int32_t pitch;
    struct wl_list link;
    struct wl_list layer_link;
    struct weston_shader *shader;
    GLfloat color[4];
    float alpha;
    struct weston_plane *plane;

    /* Surface geometry state, mutable.
     * If you change anything, set dirty = 1.
     * That includes the transformations referenced from the list.
     */
    struct {
        float x, y; /* surface translation on display */
        int32_t width, height;

        /* struct weston_transform */
        struct wl_list transformation_list;

        int dirty;
    } geometry;

    /* State derived from geometry state, read-only.
     * This is updated by weston_surface_update_transform().
     */
    struct {
        pixman_region32_t boundingbox;
        pixman_region32_t opaque;

        /* matrix and inverse are used only if enabled = 1.
         * If enabled = 0, use x, y, width, height directly.
         */
        int enabled;
        struct weston_matrix matrix;
        struct weston_matrix inverse;

        struct weston_transform position; /* matrix from x, y */
    } transform;

    /*
     * Which output to vsync this surface to.
     * Used to determine, whether to send or queue frame events.
     * Must be NULL, if 'link' is not in weston_compositor::surface_list.
     */
    struct weston_output *output;

    /*
     * A more complete representation of all outputs this surface is
     * displayed on.
     */
    uint32_t output_mask;

    struct wl_list frame_callback_list;

    EGLImageKHR images[3];
    GLenum target;
    int num_images;

    struct wl_buffer *buffer;
    struct wl_listener buffer_destroy_listener;

    /* All the pending state, that wl_surface.commit will apply. */
    struct {
        /* wl_surface.attach */
        int remove_contents;
        struct wl_buffer *buffer;
        struct wl_listener buffer_destroy_listener;
        int32_t sx;
        int32_t sy;

        /* wl_surface.damage */
        pixman_region32_t damage;

        /* wl_surface.set_opaque_region */
        pixman_region32_t opaque;

        /* wl_surface.set_input_region */
        pixman_region32_t input;

        /* wl_surface.frame */
        struct wl_list frame_callback_list;
    } pending;

    /*
     * If non-NULL, this function will be called on surface::attach after
     * a new buffer has been set up for this surface. The integer params
     * are the sx and sy paramerters supplied to surface::attach .
     */
    void (*configure)(struct weston_surface *es, int32_t sx, int32_t sy);
    void *private;
};

enum weston_key_state_update {
    STATE_UPDATE_AUTOMATIC,
    STATE_UPDATE_NONE,
};

void
weston_version(int *major, int *minor, int *micro);

void
weston_surface_update_transform(struct weston_surface *surface);

void
weston_surface_to_global_fixed(struct weston_surface *surface,
                   wl_fixed_t sx, wl_fixed_t sy,
                   wl_fixed_t *x, wl_fixed_t *y);
void
weston_surface_to_global_float(struct weston_surface *surface,
                   float sx, float sy, float *x, float *y);

void
weston_surface_from_global_float(struct weston_surface *surface,
                 float x, float y, float *sx, float *sy);
void
weston_surface_from_global(struct weston_surface *surface,
               int32_t x, int32_t y, int32_t *sx, int32_t *sy);
void
weston_surface_from_global_fixed(struct weston_surface *surface,
                     wl_fixed_t x, wl_fixed_t y,
                     wl_fixed_t *sx, wl_fixed_t *sy);

void
weston_spring_init(struct weston_spring *spring,
           double k, double current, double target);
void
weston_spring_update(struct weston_spring *spring, uint32_t msec);
int
weston_spring_done(struct weston_spring *spring);

void
weston_surface_activate(struct weston_surface *surface,
            struct weston_seat *seat);
void
notify_motion(struct weston_seat *seat, uint32_t time,
          wl_fixed_t x, wl_fixed_t y);
void
notify_button(struct weston_seat *seat, uint32_t time, int32_t button,
          enum wl_pointer_button_state state);
void
notify_axis(struct weston_seat *seat, uint32_t time, uint32_t axis,
        wl_fixed_t value);
void
notify_key(struct weston_seat *seat, uint32_t time, uint32_t key,
       enum wl_keyboard_key_state state,
       enum weston_key_state_update update_state);
void
notify_modifiers(struct weston_seat *seat, uint32_t serial);

void
notify_pointer_focus(struct weston_seat *seat, struct weston_output *output,
             wl_fixed_t x, wl_fixed_t y);

void
notify_keyboard_focus_in(struct weston_seat *seat, struct wl_array *keys,
             enum weston_key_state_update update_state);
void
notify_keyboard_focus_out(struct weston_seat *seat);

void
notify_touch(struct weston_seat *seat, uint32_t time, int touch_id,
         wl_fixed_t x, wl_fixed_t y, int touch_type);

void
weston_layer_init(struct weston_layer *layer, struct wl_list *below);

void
weston_plane_init(struct weston_plane *plane, int32_t x, int32_t y);
void
weston_plane_release(struct weston_plane *plane);

void
weston_output_finish_frame(struct weston_output *output, uint32_t msecs);
void
weston_output_schedule_repaint(struct weston_output *output);
void
weston_output_damage(struct weston_output *output);
void
weston_compositor_schedule_repaint(struct weston_compositor *compositor);
void
weston_compositor_fade(struct weston_compositor *compositor, float tint);
void
weston_compositor_damage_all(struct weston_compositor *compositor);
void
weston_compositor_unlock(struct weston_compositor *compositor);
void
weston_compositor_wake(struct weston_compositor *compositor);
void
weston_compositor_activity(struct weston_compositor *compositor);
void
weston_compositor_update_drag_surfaces(struct weston_compositor *compositor);


struct weston_binding;
typedef void (*weston_key_binding_handler_t)(struct wl_seat *seat,
                         uint32_t time, uint32_t key,
                         void *data);
struct weston_binding *
weston_compositor_add_key_binding(struct weston_compositor *compositor,
                  uint32_t key,
                  enum weston_keyboard_modifier modifier,
                  weston_key_binding_handler_t binding,
                  void *data);

typedef void (*weston_button_binding_handler_t)(struct wl_seat *seat,
                        uint32_t time, uint32_t button,
                        void *data);
struct weston_binding *
weston_compositor_add_button_binding(struct weston_compositor *compositor,
                     uint32_t button,
                     enum weston_keyboard_modifier modifier,
                     weston_button_binding_handler_t binding,
                     void *data);

typedef void (*weston_axis_binding_handler_t)(struct wl_seat *seat,
                          uint32_t time, uint32_t axis,
                          wl_fixed_t value, void *data);
struct weston_binding *
weston_compositor_add_axis_binding(struct weston_compositor *compositor,
                       uint32_t axis,
                       enum weston_keyboard_modifier modifier,
                       weston_axis_binding_handler_t binding,
                   void *data);
void
weston_binding_destroy(struct weston_binding *binding);

void
weston_binding_list_destroy_all(struct wl_list *list);

void
weston_compositor_run_key_binding(struct weston_compositor *compositor,
                  struct weston_seat *seat, uint32_t time,
                  uint32_t key,
                  enum wl_keyboard_key_state state);
void
weston_compositor_run_button_binding(struct weston_compositor *compositor,
                     struct weston_seat *seat, uint32_t time,
                     uint32_t button,
                     enum wl_pointer_button_state value);
void
weston_compositor_run_axis_binding(struct weston_compositor *compositor,
                   struct weston_seat *seat, uint32_t time,
                   uint32_t axis, int32_t value);

int
weston_environment_get_fd(const char *env);

struct wl_list *
weston_compositor_top(struct weston_compositor *compositor);

struct weston_surface *
weston_surface_create(struct weston_compositor *compositor);

void
weston_surface_configure(struct weston_surface *surface,
             float x, float y, int width, int height);

void
weston_surface_restack(struct weston_surface *surface, struct wl_list *below);

void
weston_surface_set_position(struct weston_surface *surface,
                float x, float y);

int
weston_surface_is_mapped(struct weston_surface *surface);

void
weston_surface_schedule_repaint(struct weston_surface *surface);

void
weston_surface_damage(struct weston_surface *surface);

void
weston_surface_damage_below(struct weston_surface *surface);

void
weston_surface_move_to_plane(struct weston_surface *surface,
                 struct weston_plane *plane);
void
weston_surface_unmap(struct weston_surface *surface);

void
weston_buffer_post_release(struct wl_buffer *buffer);

uint32_t
weston_compositor_get_time(void);

int
weston_compositor_init(struct weston_compositor *ec, struct wl_display *display,
               int argc, char *argv[], const char *config_file);
void
weston_compositor_shutdown(struct weston_compositor *ec);
void
weston_text_cursor_position_notify(struct weston_surface *surface,
                        wl_fixed_t x, wl_fixed_t y);
void
weston_output_init_zoom(struct weston_output *output);
void
weston_output_update_zoom(struct weston_output *output, uint32_t type);
void
weston_output_update_matrix(struct weston_output *output);
void
weston_output_move(struct weston_output *output, int x, int y);
void
weston_output_init(struct weston_output *output, struct weston_compositor *c,
           int x, int y, int width, int height, uint32_t transform);
void
weston_output_destroy(struct weston_output *output);

void
weston_seat_init(struct weston_seat *seat, struct weston_compositor *ec);
void
weston_seat_init_pointer(struct weston_seat *seat);
int
weston_seat_init_keyboard(struct weston_seat *seat, struct xkb_keymap *keymap);
void
weston_seat_init_touch(struct weston_seat *seat);

void
weston_seat_release(struct weston_seat *seat);

/* String literal of spaces, the same width as the timestamp. */
#define STAMP_SPACE "               "

void
weston_log_file_open(const char *filename);
void
weston_log_file_close(void);
int
weston_log(const char *fmt, ...)
    __attribute__ ((format (printf, 1, 2)));
int
weston_log_continue(const char *fmt, ...)
    __attribute__ ((format (printf, 1, 2)));

enum {
    TTY_ENTER_VT,
    TTY_LEAVE_VT
};

typedef void (*tty_vt_func_t)(struct weston_compositor *compositor, int event);

struct tty *
tty_create(struct weston_compositor *compositor,
       tty_vt_func_t vt_func, int tty_nr);

void
tty_destroy(struct tty *tty);

void
tty_reset(struct tty *tty);

int
tty_activate_vt(struct tty *tty, int vt);

void
screenshooter_create(struct weston_compositor *ec);

struct clipboard *
clipboard_create(struct weston_seat *seat);

void
text_cursor_position_notifier_create(struct weston_compositor *ec);

void
text_model_factory_create(struct weston_compositor *ec);

void
input_method_create(struct weston_compositor *ec,
            struct weston_seat *seat);

struct weston_process;
typedef void (*weston_process_cleanup_func_t)(struct weston_process *process,
                        int status);

struct weston_process {
    pid_t pid;
    weston_process_cleanup_func_t cleanup;
    struct wl_list link;
};

struct wl_client *
weston_client_launch(struct weston_compositor *compositor,
             struct weston_process *proc,
             const char *path,
             weston_process_cleanup_func_t cleanup);

void
weston_watch_process(struct weston_process *process);

struct weston_surface_animation;
typedef void (*weston_surface_animation_done_func_t)(struct weston_surface_animation *animation, void *data);

struct weston_surface_animation *
weston_zoom_run(struct weston_surface *surface, float start, float stop,
        weston_surface_animation_done_func_t done, void *data);

struct weston_surface_animation *
weston_fade_run(struct weston_surface *surface,
        weston_surface_animation_done_func_t done, void *data);
struct weston_surface_animation *
weston_slide_run(struct weston_surface *surface, float start, float stop,
         weston_surface_animation_done_func_t done, void *data);

void
weston_surface_set_color(struct weston_surface *surface,
             float red, float green, float blue, float alpha);

void
weston_surface_destroy(struct weston_surface *surface);

int
weston_output_switch_mode(struct weston_output *output, struct weston_mode *mode);

int
gles2_renderer_init(struct weston_compositor *ec);
void
gles2_renderer_destroy(struct weston_compositor *ec);

struct weston_compositor *
backend_init(struct wl_display *display, int argc, char *argv[],
        const char *config_file);

int
module_init(struct weston_compositor *compositor);

#endif