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aa1246e891
This is the another step into abstracting the backend operations that are currently spread all across the board back into the backend implementations where they belong. The GL context creation, for instance, is demanded to the stage realization which makes it a critical path for every operation that is GL-context bound. This usually does not make any difference since we realize the default stage, but at some point we might start looking into avoiding the default stage realization in order to make the Clutter startup faster. It also makes the code maintainable because every part is self contained and can be reworked with the minimum amount of pain.
306 lines
9.7 KiB
C
306 lines
9.7 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, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "clutter-backend-glx.h"
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#include "clutter-stage-glx.h"
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#include "clutter-glx.h"
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#include "../clutter-main.h"
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#include "../clutter-feature.h"
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#include "../clutter-color.h"
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#include "../clutter-util.h"
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#include "../clutter-event.h"
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#include "../clutter-enum-types.h"
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#include "../clutter-private.h"
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#include "../clutter-debug.h"
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#include "../clutter-units.h"
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#include "../clutter-shader.h"
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#include "../clutter-group.h"
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#include "../clutter-container.h"
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#include "../clutter-stage.h"
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#include "../clutter-stage-window.h"
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#include "cogl/cogl.h"
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#include <GL/glx.h>
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#include <GL/gl.h>
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static void clutter_stage_window_iface_init (ClutterStageWindowIface *iface);
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G_DEFINE_TYPE_WITH_CODE (ClutterStageGLX,
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clutter_stage_glx,
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CLUTTER_TYPE_STAGE_X11,
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G_IMPLEMENT_INTERFACE (CLUTTER_TYPE_STAGE_WINDOW,
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clutter_stage_window_iface_init));
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static void
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clutter_stage_glx_unrealize (ClutterActor *actor)
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{
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ClutterStageX11 *stage_x11 = CLUTTER_STAGE_X11 (actor);
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ClutterStageGLX *stage_glx = CLUTTER_STAGE_GLX (actor);
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gboolean was_offscreen;
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/* Note unrealize should free up any backend stage related resources */
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CLUTTER_NOTE (BACKEND, "Unrealizing stage");
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g_object_get (stage_x11->wrapper, "offscreen", &was_offscreen, NULL);
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if (CLUTTER_ACTOR_CLASS (clutter_stage_glx_parent_class)->unrealize != NULL)
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CLUTTER_ACTOR_CLASS (clutter_stage_glx_parent_class)->unrealize (actor);
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clutter_x11_trap_x_errors ();
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if (G_UNLIKELY (was_offscreen))
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{
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if (stage_glx->glxpixmap)
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{
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glXDestroyGLXPixmap (stage_x11->xdpy,stage_glx->glxpixmap);
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stage_glx->glxpixmap = None;
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}
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if (stage_x11->xpixmap)
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{
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XFreePixmap (stage_x11->xdpy, stage_x11->xpixmap);
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stage_x11->xpixmap = None;
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}
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}
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else
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{
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if (!stage_x11->is_foreign_xwin && stage_x11->xwin != None)
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{
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XDestroyWindow (stage_x11->xdpy, stage_x11->xwin);
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stage_x11->xwin = None;
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}
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else
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stage_x11->xwin = None;
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}
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if (stage_x11->xvisinfo != None)
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{
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XFree (stage_x11->xvisinfo);
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stage_x11->xvisinfo = None;
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}
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XSync (stage_x11->xdpy, False);
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clutter_x11_untrap_x_errors ();
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CLUTTER_MARK ();
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}
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static void
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clutter_stage_glx_realize (ClutterActor *actor)
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{
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ClutterStageX11 *stage_x11 = CLUTTER_STAGE_X11 (actor);
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ClutterStageGLX *stage_glx = CLUTTER_STAGE_GLX (actor);
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ClutterBackend *backend;
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ClutterBackendGLX *backend_glx;
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ClutterBackendX11 *backend_x11;
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gboolean is_offscreen;
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CLUTTER_NOTE (ACTOR, "Realizing stage '%s' [%p]",
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G_OBJECT_TYPE_NAME (actor),
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actor);
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g_object_get (stage_x11->wrapper, "offscreen", &is_offscreen, NULL);
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backend = clutter_get_default_backend ();
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backend_glx = CLUTTER_BACKEND_GLX (backend);
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backend_x11 = CLUTTER_BACKEND_X11 (backend);
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if (G_LIKELY (!is_offscreen))
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{
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GError *error;
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stage_x11->xvisinfo =
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clutter_backend_x11_get_visual_info (backend_x11, FALSE);
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if (stage_x11->xvisinfo == None)
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{
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g_critical ("Unable to find suitable GL visual.");
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goto fail;
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}
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if (stage_x11->xwin == None)
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{
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XSetWindowAttributes xattr;
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unsigned long mask;
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CLUTTER_NOTE (MISC, "Creating stage X window");
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/* window attributes */
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xattr.background_pixel = WhitePixel (stage_x11->xdpy,
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stage_x11->xscreen);
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xattr.border_pixel = 0;
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xattr.colormap = XCreateColormap (stage_x11->xdpy,
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stage_x11->xwin_root,
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stage_x11->xvisinfo->visual,
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AllocNone);
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mask = CWBorderPixel | CWColormap;
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stage_x11->xwin = XCreateWindow (stage_x11->xdpy,
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stage_x11->xwin_root,
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0, 0,
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stage_x11->xwin_width,
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stage_x11->xwin_height,
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0,
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stage_x11->xvisinfo->depth,
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InputOutput,
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stage_x11->xvisinfo->visual,
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mask, &xattr);
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}
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if (clutter_x11_has_event_retrieval())
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{
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if (clutter_x11_has_xinput())
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{
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XSelectInput (stage_x11->xdpy, stage_x11->xwin,
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StructureNotifyMask |
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FocusChangeMask |
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ExposureMask |
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KeyPressMask | KeyReleaseMask |
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EnterWindowMask | LeaveWindowMask |
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PropertyChangeMask);
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#ifdef USE_XINPUT
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_clutter_x11_select_events (stage_x11->xwin);
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#endif
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}
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else
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XSelectInput (stage_x11->xdpy, stage_x11->xwin,
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StructureNotifyMask |
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FocusChangeMask |
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ExposureMask |
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PointerMotionMask |
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KeyPressMask | KeyReleaseMask |
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ButtonPressMask | ButtonReleaseMask |
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EnterWindowMask | LeaveWindowMask |
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PropertyChangeMask);
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}
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/* no user resize.. */
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clutter_stage_x11_fix_window_size (stage_x11);
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clutter_stage_x11_set_wm_protocols (stage_x11);
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/* ask for a context; a no-op, if a context already exists */
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error = NULL;
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_clutter_backend_create_context (backend, FALSE, &error);
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if (error)
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{
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g_critical ("Unable to realize stage: %s", error->message);
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g_error_free (error);
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goto fail;
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}
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CLUTTER_NOTE (BACKEND, "Marking stage as realized");
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CLUTTER_ACTOR_SET_FLAGS (stage_x11, CLUTTER_ACTOR_REALIZED);
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}
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else
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{
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GError *error;
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if (stage_x11->xvisinfo != None)
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{
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XFree (stage_x11->xvisinfo);
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stage_x11->xvisinfo = None;
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}
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stage_x11->xvisinfo =
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clutter_backend_x11_get_visual_info (backend_x11, TRUE);
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if (stage_x11->xvisinfo == None)
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{
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g_critical ("Unable to find suitable GL visual.");
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goto fail;
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}
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stage_x11->xpixmap = XCreatePixmap (stage_x11->xdpy,
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stage_x11->xwin_root,
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stage_x11->xwin_width,
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stage_x11->xwin_height,
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DefaultDepth (stage_x11->xdpy,
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stage_x11->xscreen));
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stage_glx->glxpixmap = glXCreateGLXPixmap (stage_x11->xdpy,
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stage_x11->xvisinfo,
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stage_x11->xpixmap);
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/* ask for a context; a no-op, if a context already exists
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*
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* FIXME: we probably need a seperate offscreen context here
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* - though it likely makes most sense to drop offscreen stages
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* and rely on FBO's instead and GLXPixmaps seems mostly broken
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* anyway..
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*/
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error = NULL;
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_clutter_backend_create_context (backend, TRUE, &error);
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if (error)
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{
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g_critical ("Unable to realize stage: %s", error->message);
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g_error_free (error);
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goto fail;
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}
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CLUTTER_NOTE (BACKEND, "Marking stage as realized");
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CLUTTER_ACTOR_SET_FLAGS (stage_x11, CLUTTER_ACTOR_REALIZED);
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}
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/* we need to chain up to the X11 stage implementation in order to
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* set the window state in case we set it before realizing the stage
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*/
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CLUTTER_ACTOR_CLASS (clutter_stage_glx_parent_class)->realize (actor);
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return;
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fail:
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CLUTTER_ACTOR_UNSET_FLAGS (actor, CLUTTER_ACTOR_REALIZED);
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}
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static void
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clutter_stage_glx_dispose (GObject *gobject)
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{
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G_OBJECT_CLASS (clutter_stage_glx_parent_class)->dispose (gobject);
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}
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static void
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clutter_stage_glx_class_init (ClutterStageGLXClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
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gobject_class->dispose = clutter_stage_glx_dispose;
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actor_class->realize = clutter_stage_glx_realize;
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actor_class->unrealize = clutter_stage_glx_unrealize;
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}
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static void
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clutter_stage_glx_init (ClutterStageGLX *stage)
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{
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}
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static void
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clutter_stage_window_iface_init (ClutterStageWindowIface *iface)
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{
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/* the rest is inherited from ClutterStageX11 */
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}
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