/* Clutter.
 * An OpenGL based 'interactive canvas' library.
 *
 * Copyright (C) 2006, 2007 OpenedHand
 * Copyright (C) 2010 Intel Corp
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
 *
 * Authors:
 *  Matthew Allum
 *  Robert Bragg
 */

#ifndef __CLUTTER_BACKEND_EGL_H__
#define __CLUTTER_BACKEND_EGL_H__

#include <glib-object.h>
#include <clutter/clutter-event.h>
#ifdef COGL_HAS_XLIB_SUPPORT
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#endif

#include "clutter-backend-private.h"

#include "clutter-egl-headers.h"

#ifdef COGL_HAS_X11_SUPPORT
#include "../x11/clutter-backend-x11.h"
#endif

#include "clutter-egl.h"

G_BEGIN_DECLS

#define CLUTTER_TYPE_BACKEND_EGL                (_clutter_backend_egl_get_type ())
#define CLUTTER_BACKEND_EGL(obj)                (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_BACKEND_EGL, ClutterBackendEGL))
#define CLUTTER_IS_BACKEND_EGL(obj)             (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_BACKEND_EGL))
#define CLUTTER_BACKEND_EGL_CLASS(klass)        (G_TYPE_CHECK_CLASS_CAST ((klass), CLUTTER_TYPE_BACKEND_EGL, ClutterBackendEGLClass))
#define CLUTTER_IS_BACKEND_EGL_CLASS(klass)     (G_TYPE_CHECK_CLASS_TYPE ((klass), CLUTTER_TYPE_BACKEND_EGL))
#define CLUTTER_BACKEND_EGL_GET_CLASS(obj)      (G_TYPE_INSTANCE_GET_CLASS ((obj), CLUTTER_TYPE_BACKEND_EGL, ClutterBackendEGLClass))

typedef struct _ClutterBackendEGL       ClutterBackendEGL;
typedef struct _ClutterBackendEGLClass  ClutterBackendEGLClass;

typedef enum ClutterEGLVBlankType {
  CLUTTER_VBLANK_NONE = 0,
  CLUTTER_VBLANK_SWAP_INTERVAL
} ClutterEGLVBlankType;

typedef void (*BlitFramebufferProc) (GLint      srcX0,
                                     GLint      srcY0,
                                     GLint      srcX1,
                                     GLint      srcY1,
                                     GLint      dstX0,
                                     GLint      dstY0,
                                     GLint      dstX1,
                                     GLint      dstY1,
                                     GLbitfield mask,
                                     GLenum     filter);

typedef EGLBoolean (*SwapBuffersRegionProc) (EGLDisplay dpy,
                                             EGLSurface surface,
                                             EGLint numRects,
                                             const EGLint *rects);
struct _ClutterBackendEGL
{
#ifdef COGL_HAS_XLIB_SUPPORT
  ClutterBackendX11 parent_instance;

  /* EGL Specific */
  EGLDisplay edpy;
  EGLContext egl_context;
  EGLConfig  egl_config;

  Window     dummy_xwin;
  EGLSurface dummy_surface;

#else /* COGL_HAS_X11_SUPPORT */

  ClutterBackend parent_instance;

  /* EGL Specific */
  EGLDisplay edpy;
  EGLSurface egl_surface;
  EGLContext egl_context;

  /* from the backend */
  gint surface_width;
  gint surface_height;

  /* main stage singleton */
  ClutterStageWindow *stage;

  /* event source */
  GSource *event_source;

  /* event timer */
  GTimer *event_timer;

  /* FB device */
  gint fb_device_id;

#endif /* COGL_HAS_X11_SUPPORT */

  gint egl_version_major;
  gint egl_version_minor;

  ClutterEGLVBlankType vblank_type;

  gboolean              can_blit_sub_buffer;
  BlitFramebufferProc   blit_framebuffer;
  SwapBuffersRegionProc swap_buffers_region;
  gboolean              blit_sub_buffer_is_synchronized;
};

struct _ClutterBackendEGLClass
{
#ifdef COGL_HAS_XLIB_SUPPORT
  ClutterBackendX11Class parent_class;
#else
  ClutterBackendClass parent_class;
#endif
};

GType _clutter_backend_egl_get_type (void) G_GNUC_CONST;

void _clutter_events_egl_init   (ClutterBackendEGL *backend);
void _clutter_events_egl_uninit (ClutterBackendEGL *backend);

void
_clutter_backend_egl_blit_sub_buffer (ClutterBackendEGL *backend_egl,
                                      EGLSurface drawable,
                                      int x, int y, int width, int height);

G_END_DECLS

#endif /* __CLUTTER_BACKEND_EGL_H__ */