a5c30398df
This adds egl backend support for handling clipped redraws. This uses the EGL_NOK_swap_region extension to enable the EGL backend to present a subregion from the back buffer to the front so we don't always have to redraw the entire stage for small updates.
150 lines
4.5 KiB
C
150 lines
4.5 KiB
C
/* Clutter.
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* An OpenGL based 'interactive canvas' library.
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*
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* Copyright (C) 2006, 2007 OpenedHand
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* Copyright (C) 2010 Intel Corp
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Authors:
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* Matthew Allum
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* Robert Bragg
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*/
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#ifndef __CLUTTER_BACKEND_EGL_H__
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#define __CLUTTER_BACKEND_EGL_H__
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#include <glib-object.h>
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#include <clutter/clutter-event.h>
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#ifdef COGL_HAS_XLIB_SUPPORT
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#include <X11/Xlib.h>
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#include <X11/Xatom.h>
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#endif
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#include "clutter-backend-private.h"
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#include "clutter-egl-headers.h"
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#ifdef COGL_HAS_X11_SUPPORT
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#include "../x11/clutter-backend-x11.h"
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#endif
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#include "clutter-egl.h"
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G_BEGIN_DECLS
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#define CLUTTER_TYPE_BACKEND_EGL (_clutter_backend_egl_get_type ())
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#define CLUTTER_BACKEND_EGL(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_BACKEND_EGL, ClutterBackendEGL))
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#define CLUTTER_IS_BACKEND_EGL(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_BACKEND_EGL))
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#define CLUTTER_BACKEND_EGL_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), CLUTTER_TYPE_BACKEND_EGL, ClutterBackendEGLClass))
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#define CLUTTER_IS_BACKEND_EGL_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), CLUTTER_TYPE_BACKEND_EGL))
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#define CLUTTER_BACKEND_EGL_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), CLUTTER_TYPE_BACKEND_EGL, ClutterBackendEGLClass))
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typedef struct _ClutterBackendEGL ClutterBackendEGL;
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typedef struct _ClutterBackendEGLClass ClutterBackendEGLClass;
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typedef enum ClutterEGLVBlankType {
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CLUTTER_VBLANK_NONE = 0,
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CLUTTER_VBLANK_SWAP_INTERVAL
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} ClutterEGLVBlankType;
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typedef void (*BlitFramebufferProc) (GLint srcX0,
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GLint srcY0,
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GLint srcX1,
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GLint srcY1,
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GLint dstX0,
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GLint dstY0,
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GLint dstX1,
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GLint dstY1,
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GLbitfield mask,
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GLenum filter);
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typedef EGLBoolean (*SwapBuffersRegionProc) (EGLDisplay dpy,
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EGLSurface surface,
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EGLint numRects,
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const EGLint *rects);
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struct _ClutterBackendEGL
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{
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#ifdef COGL_HAS_XLIB_SUPPORT
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ClutterBackendX11 parent_instance;
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/* EGL Specific */
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EGLDisplay edpy;
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EGLContext egl_context;
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EGLConfig egl_config;
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Window dummy_xwin;
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EGLSurface dummy_surface;
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#else /* COGL_HAS_X11_SUPPORT */
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ClutterBackend parent_instance;
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/* EGL Specific */
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EGLDisplay edpy;
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EGLSurface egl_surface;
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EGLContext egl_context;
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/* from the backend */
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gint surface_width;
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gint surface_height;
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/* main stage singleton */
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ClutterStageWindow *stage;
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/* event source */
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GSource *event_source;
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/* event timer */
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GTimer *event_timer;
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/* FB device */
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gint fb_device_id;
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#endif /* COGL_HAS_X11_SUPPORT */
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gint egl_version_major;
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gint egl_version_minor;
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ClutterEGLVBlankType vblank_type;
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gboolean can_blit_sub_buffer;
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BlitFramebufferProc blit_framebuffer;
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SwapBuffersRegionProc swap_buffers_region;
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gboolean blit_sub_buffer_is_synchronized;
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};
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struct _ClutterBackendEGLClass
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{
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#ifdef COGL_HAS_XLIB_SUPPORT
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ClutterBackendX11Class parent_class;
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#else
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ClutterBackendClass parent_class;
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#endif
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};
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GType _clutter_backend_egl_get_type (void) G_GNUC_CONST;
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void _clutter_events_egl_init (ClutterBackendEGL *backend);
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void _clutter_events_egl_uninit (ClutterBackendEGL *backend);
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void
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_clutter_backend_egl_blit_sub_buffer (ClutterBackendEGL *backend_egl,
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EGLSurface drawable,
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int x, int y, int width, int height);
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G_END_DECLS
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#endif /* __CLUTTER_BACKEND_EGL_H__ */
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