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30296a3307
If we have the GLX_SGI_video_sync extension then it's possible to always keep track for the video sync counter each time we call glXSwapBuffers or do a sub stage blit. This then allows us to avoid waiting before issuing a blit if we can see that the counter has already progressed. Also since we expect that glXCopySubBuffer is synchronized to the vblank we don't need to use glFinish () in conjunction with the vblank wait since the vblank wait's only purpose is to add a delay.
125 lines
4.5 KiB
C
125 lines
4.5 KiB
C
/* Clutter.
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* An OpenGL based 'interactive canvas' library.
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* Authored By Matthew Allum <mallum@openedhand.com>
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* Copyright (C) 2006-2007 OpenedHand
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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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*
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*/
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#ifndef __CLUTTER_BACKEND_GLX_H__
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#define __CLUTTER_BACKEND_GLX_H__
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#include <glib-object.h>
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#include <clutter/clutter-event.h>
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#include <clutter/clutter-backend.h>
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#include <X11/Xlib.h>
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#include <X11/Xatom.h>
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#include <GL/glx.h>
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#include <GL/gl.h>
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#include "../x11/clutter-backend-x11.h"
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#include "clutter-glx.h"
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G_BEGIN_DECLS
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#define CLUTTER_TYPE_BACKEND_GLX (clutter_backend_glx_get_type ())
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#define CLUTTER_BACKEND_GLX(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_BACKEND_GLX, ClutterBackendGLX))
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#define CLUTTER_IS_BACKEND_GLX(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_BACKEND_GLX))
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#define CLUTTER_BACKEND_GLX_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), CLUTTER_TYPE_BACKEND_GLX, ClutterBackendGLXClass))
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#define CLUTTER_IS_BACKEND_GLX_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), CLUTTER_TYPE_BACKEND_GLX))
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#define CLUTTER_BACKEND_GLX_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), CLUTTER_TYPE_BACKEND_GLX, ClutterBackendGLXClass))
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typedef struct _ClutterBackendGLX ClutterBackendGLX;
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typedef struct _ClutterBackendGLXClass ClutterBackendGLXClass;
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typedef enum ClutterGLXVBlankType {
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CLUTTER_VBLANK_NONE = 0,
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CLUTTER_VBLANK_GLX_SWAP,
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CLUTTER_VBLANK_GLX,
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CLUTTER_VBLANK_DRI
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} ClutterGLXVBlankType;
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typedef int (*GetVideoSyncProc) (unsigned int *count);
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typedef int (*WaitVideoSyncProc) (int divisor,
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int remainder,
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unsigned int *count);
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typedef int (*SwapIntervalProc) (int interval);
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typedef void (*CopySubBufferProc)(Display *dpy,
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GLXDrawable drawable,
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int x, int y, int width, int height);
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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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struct _ClutterBackendGLX
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{
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ClutterBackendX11 parent_instance;
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int error_base;
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int event_base;
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/* Single context for all wins */
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gboolean found_fbconfig;
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GLXFBConfig fbconfig;
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GLXContext gl_context;
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Window dummy_xwin;
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GLXWindow dummy_glxwin;
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/* Vblank stuff */
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GetVideoSyncProc get_video_sync;
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WaitVideoSyncProc wait_video_sync;
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SwapIntervalProc swap_interval;
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gint dri_fd;
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ClutterGLXVBlankType vblank_type;
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unsigned int last_video_sync_count;
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gboolean can_blit_sub_buffer;
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CopySubBufferProc copy_sub_buffer;
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BlitFramebufferProc blit_framebuffer;
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gboolean blit_sub_buffer_is_synchronized;
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/* props */
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Atom atom_WM_STATE;
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Atom atom_WM_STATE_FULLSCREEN;
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};
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struct _ClutterBackendGLXClass
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{
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ClutterBackendX11Class parent_class;
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};
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GType clutter_backend_glx_get_type (void) G_GNUC_CONST;
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gboolean
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_clutter_backend_glx_get_fbconfig (ClutterBackendGLX *backend_x11,
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GLXFBConfig *config);
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void
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_clutter_backend_glx_blit_sub_buffer (ClutterBackendGLX *backend_glx,
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GLXDrawable 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_GLX_H__ */
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