2d8083bab8
Since GLX and EGL are abstracted by Cogl the two backends are both implementing everything using the Cogl API and they are almost identical. This updates the egl backend to support everything that the glx backend supports. Now that EGL and GLX are abstracted by Cogl, the plan is that we will squash the clutter-egl/glx backends into one. Since the EGL backend in clutter can conditionally not depend on X11 we will use the EGL backend as the starting point of our common backend. https://bugzilla.gnome.org/show_bug.cgi?id=649826
630 lines
20 KiB
C
630 lines
20 KiB
C
/*
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* Clutter.
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Copyright (C) 2007,2008,2009,2010,2011 Intel Corporation.
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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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* Authors:
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* Matthew Allum
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* Robert Bragg
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* Neil Roberts
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* Emmanuele Bassi
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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-stage-cogl.h"
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#include "clutter-backend-cogl.h"
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#include "clutter-debug.h"
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#include "clutter-event.h"
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#include "clutter-enum-types.h"
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#include "clutter-feature.h"
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#include "clutter-main.h"
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#include "clutter-private.h"
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#include "clutter-actor-private.h"
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#include "clutter-stage-private.h"
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#include "clutter-util.h"
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#ifdef COGL_HAS_X11_SUPPORT
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static ClutterStageWindowIface *clutter_stage_window_parent_iface = NULL;
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#endif
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static void clutter_stage_window_iface_init (ClutterStageWindowIface *iface);
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G_DEFINE_TYPE_WITH_CODE (ClutterStageCogl,
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_clutter_stage_cogl,
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#ifdef COGL_HAS_X11_SUPPORT
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CLUTTER_TYPE_STAGE_X11,
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#else
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G_TYPE_OBJECT,
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#endif
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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_cogl_unrealize (ClutterStageWindow *stage_window)
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{
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ClutterStageCogl *stage_cogl = CLUTTER_STAGE_COGL (stage_window);
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CLUTTER_NOTE (BACKEND, "Unrealizing Cogl stage [%p]", stage_cogl);
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#ifdef COGL_HAS_XLIB_SUPPORT
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/* chain up to the StageX11 implementation */
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clutter_stage_window_parent_iface->unrealize (stage_window);
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#endif
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cogl_object_unref (stage_cogl->onscreen);
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stage_cogl->onscreen = NULL;
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}
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static void
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handle_swap_complete_cb (CoglFramebuffer *framebuffer,
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void *user_data)
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{
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ClutterStageCogl *stage_cogl = user_data;
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/* Early versions of the swap_event implementation in Mesa
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* deliver BufferSwapComplete event when not selected for,
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* so if we get a swap event we aren't expecting, just ignore it.
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*
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* https://bugs.freedesktop.org/show_bug.cgi?id=27962
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*
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* FIXME: This issue can be hidden inside Cogl so we shouldn't
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* need to care about this bug here.
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*/
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if (stage_cogl->pending_swaps > 0)
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stage_cogl->pending_swaps--;
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}
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static gboolean
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clutter_stage_cogl_realize (ClutterStageWindow *stage_window)
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{
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ClutterStageCogl *stage_cogl = CLUTTER_STAGE_COGL (stage_window);
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#ifdef COGL_HAS_XLIB_SUPPORT
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ClutterStageX11 *stage_x11 = CLUTTER_STAGE_X11 (stage_window);
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#endif
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ClutterBackend *backend;
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ClutterBackendCogl *backend_cogl;
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CoglFramebuffer *framebuffer;
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GError *error = NULL;
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gfloat width = 800;
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gfloat height = 600;
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const char *clutter_vblank;
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CLUTTER_NOTE (BACKEND, "Realizing stage '%s' [%p]",
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G_OBJECT_TYPE_NAME (stage_cogl),
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stage_cogl);
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backend = clutter_get_default_backend ();
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backend_cogl = CLUTTER_BACKEND_COGL (backend);
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#ifdef COGL_HAS_XLIB_SUPPORT
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clutter_actor_get_size (CLUTTER_ACTOR (stage_x11->wrapper), &width, &height);
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#endif
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stage_cogl->onscreen = cogl_onscreen_new (backend->cogl_context,
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width, height);
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#ifdef COGL_HAS_XLIB_SUPPORT
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if (stage_x11->xwin != None)
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{
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cogl_onscreen_x11_set_foreign_window_xid (
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stage_cogl->onscreen,
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stage_x11->xwin,
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_clutter_stage_x11_update_foreign_event_mask,
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stage_x11);
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}
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#endif
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clutter_vblank = _clutter_backend_cogl_get_vblank ();
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if (clutter_vblank && strcmp (clutter_vblank, "none") == 0)
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cogl_onscreen_set_swap_throttled (stage_cogl->onscreen, FALSE);
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framebuffer = COGL_FRAMEBUFFER (stage_cogl->onscreen);
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if (!cogl_framebuffer_allocate (framebuffer, &error))
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{
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g_warning ("Failed to allocate stage: %s", error->message);
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g_error_free (error);
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cogl_object_unref (stage_cogl->onscreen);
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stage_cogl->onscreen = NULL;
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return FALSE;
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}
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/* FIXME: for fullscreen Cogl platforms then the size we gave above
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* will be ignored, so we need to make sure the stage size is
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* updated to this size. */
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if (cogl_clutter_winsys_has_feature (COGL_WINSYS_FEATURE_SWAP_BUFFERS_EVENT))
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{
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stage_cogl->swap_callback_id =
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cogl_framebuffer_add_swap_buffers_callback (framebuffer,
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handle_swap_complete_cb,
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stage_cogl);
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}
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#ifdef COGL_HAS_XLIB_SUPPORT
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if (stage_x11->xwin == None)
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stage_x11->xwin = cogl_onscreen_x11_get_window_xid (stage_cogl->onscreen);
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return clutter_stage_window_parent_iface->realize (stage_window);
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#else
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return TRUE;
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#endif
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}
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static int
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clutter_stage_cogl_get_pending_swaps (ClutterStageWindow *stage_window)
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{
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ClutterStageCogl *stage_cogl = CLUTTER_STAGE_COGL (stage_window);
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return stage_cogl->pending_swaps;
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}
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#ifndef COGL_HAS_XLIB_SUPPORT
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/* FIXME: Move this warnings up into clutter-stage.c */
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static void
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clutter_stage_cogl_set_fullscreen (ClutterStageWindow *stage_window,
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gboolean fullscreen)
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{
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g_warning ("Stage of type '%s' do not support ClutterStage::set_fullscreen",
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G_OBJECT_TYPE_NAME (stage_window));
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}
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static void
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clutter_stage_cogl_set_title (ClutterStageWindow *stage_window,
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const gchar *title)
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{
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g_warning ("Stage of type '%s' do not support ClutterStage::set_title",
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G_OBJECT_TYPE_NAME (stage_window));
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}
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static void
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clutter_stage_cogl_set_cursor_visible (ClutterStageWindow *stage_window,
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gboolean cursor_visible)
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{
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g_warning ("Stage of type '%s' do not support ClutterStage::set_cursor_visible",
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G_OBJECT_TYPE_NAME (stage_window));
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}
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static ClutterActor *
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clutter_stage_cogl_get_wrapper (ClutterStageWindow *stage_window)
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{
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return CLUTTER_ACTOR (CLUTTER_STAGE_COGL (stage_window)->wrapper);
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}
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static void
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clutter_stage_cogl_show (ClutterStageWindow *stage_window,
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gboolean do_raise)
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{
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ClutterStageCogl *stage_cogl = CLUTTER_STAGE_COGL (stage_window);
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clutter_actor_map (CLUTTER_ACTOR (stage_cogl->wrapper));
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}
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static void
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clutter_stage_cogl_hide (ClutterStageWindow *stage_window)
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{
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ClutterStageCogl *stage_cogl = CLUTTER_STAGE_COGL (stage_window);
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clutter_actor_unmap (CLUTTER_ACTOR (stage_cogl->wrapper));
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}
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static void
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clutter_stage_cogl_get_geometry (ClutterStageWindow *stage_window,
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ClutterGeometry *geometry)
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{
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ClutterStageCogl *stage_cogl = CLUTTER_STAGE_COGL (stage_window);
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if (geometry)
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{
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if (stage_cogl->onscreen)
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{
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CoglFramebuffer *framebuffer =
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COGL_FRAMEBUFFER (stage_cogl->onscreen);
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geometry->x = geometry->y = 0;
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geometry->width = cogl_framebuffer_get_width (framebuffer);
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geometry->height = cogl_framebuffer_get_height (framebuffer);
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}
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else
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{
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geometry->x = geometry->y = 0;
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geometry->width = 800;
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geometry->height = 600;
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}
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}
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}
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static void
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clutter_stage_cogl_resize (ClutterStageWindow *stage_window,
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gint width,
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gint height)
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{
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}
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#endif /* COGL_HAS_XLIB_SUPPORT */
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static gboolean
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clutter_stage_cogl_has_redraw_clips (ClutterStageWindow *stage_window)
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{
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ClutterStageCogl *stage_cogl = CLUTTER_STAGE_COGL (stage_window);
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/* NB: at the start of each new frame there is an implied clip that
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* clips everything (i.e. nothing would be drawn) so we need to make
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* sure we return True in the un-initialized case here.
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*
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* NB: a clip width of 0 means a full stage redraw has been queued
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* so we effectively don't have any redraw clips in that case.
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*/
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if (!stage_cogl->initialized_redraw_clip ||
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(stage_cogl->initialized_redraw_clip &&
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stage_cogl->bounding_redraw_clip.width != 0))
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return TRUE;
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else
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return FALSE;
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}
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static gboolean
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clutter_stage_cogl_ignoring_redraw_clips (ClutterStageWindow *stage_window)
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{
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ClutterStageCogl *stage_cogl = CLUTTER_STAGE_COGL (stage_window);
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/* NB: a clip width of 0 means a full stage redraw is required */
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if (stage_cogl->initialized_redraw_clip &&
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stage_cogl->bounding_redraw_clip.width == 0)
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return TRUE;
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else
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return FALSE;
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}
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/* A redraw clip represents (in stage coordinates) the bounding box of
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* something that needs to be redraw. Typically they are added to the
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* StageWindow as a result of clutter_actor_queue_clipped_redraw() by
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* actors such as ClutterGLXTexturePixmap. All redraw clips are
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* discarded after the next paint.
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*
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* A NULL stage_clip means the whole stage needs to be redrawn.
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*
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* What we do with this information:
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* - we keep track of the bounding box for all redraw clips
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* - when we come to redraw; we scissor the redraw to that box and use
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* glBlitFramebuffer to present the redraw to the front
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* buffer.
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*/
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static void
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clutter_stage_cogl_add_redraw_clip (ClutterStageWindow *stage_window,
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ClutterGeometry *stage_clip)
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{
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ClutterStageCogl *stage_cogl = CLUTTER_STAGE_COGL (stage_window);
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/* If we are already forced to do a full stage redraw then bail early */
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if (clutter_stage_cogl_ignoring_redraw_clips (stage_window))
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return;
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/* A NULL stage clip means a full stage redraw has been queued and
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* we keep track of this by setting a zero width
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* stage_cogl->bounding_redraw_clip */
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if (stage_clip == NULL)
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{
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stage_cogl->bounding_redraw_clip.width = 0;
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stage_cogl->initialized_redraw_clip = TRUE;
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return;
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}
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/* Ignore requests to add degenerate/empty clip rectangles */
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if (stage_clip->width == 0 || stage_clip->height == 0)
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return;
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if (!stage_cogl->initialized_redraw_clip)
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{
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stage_cogl->bounding_redraw_clip.x = stage_clip->x;
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stage_cogl->bounding_redraw_clip.y = stage_clip->y;
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stage_cogl->bounding_redraw_clip.width = stage_clip->width;
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stage_cogl->bounding_redraw_clip.height = stage_clip->height;
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}
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else if (stage_cogl->bounding_redraw_clip.width > 0)
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{
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clutter_geometry_union (&stage_cogl->bounding_redraw_clip, stage_clip,
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&stage_cogl->bounding_redraw_clip);
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}
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stage_cogl->initialized_redraw_clip = TRUE;
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}
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/* XXX: This is basically identical to clutter_stage_glx_redraw */
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static void
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clutter_stage_cogl_redraw (ClutterStageWindow *stage_window)
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{
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ClutterStageCogl *stage_cogl = CLUTTER_STAGE_COGL (stage_window);
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ClutterActor *wrapper;
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ClutterBackend *backend;
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ClutterBackendCogl *backend_cogl;
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gboolean may_use_clipped_redraw;
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gboolean use_clipped_redraw;
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CLUTTER_STATIC_TIMER (painting_timer,
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"Redrawing", /* parent */
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"Painting actors",
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"The time spent painting actors",
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0 /* no application private data */);
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CLUTTER_STATIC_TIMER (swapbuffers_timer,
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"Redrawing", /* parent */
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"eglSwapBuffers",
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"The time spent blocked by eglSwapBuffers",
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0 /* no application private data */);
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CLUTTER_STATIC_TIMER (blit_sub_buffer_timer,
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"Redrawing", /* parent */
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"egl_blit_sub_buffer",
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"The time spent in _egl_blit_sub_buffer",
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0 /* no application private data */);
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#ifdef COGL_HAS_X11_SUPPORT
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ClutterStageX11 *stage_x11 = CLUTTER_STAGE_X11 (stage_cogl);
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wrapper = CLUTTER_ACTOR (stage_x11->wrapper);
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#else
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wrapper = CLUTTER_ACTOR (stage_cogl->wrapper);
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#endif
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if (!stage_cogl->onscreen)
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return;
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backend = clutter_get_default_backend ();
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backend_cogl = CLUTTER_BACKEND_COGL (backend);
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CLUTTER_TIMER_START (_clutter_uprof_context, painting_timer);
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if (G_LIKELY (backend_cogl->can_blit_sub_buffer) &&
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/* NB: a zero width redraw clip == full stage redraw */
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stage_cogl->bounding_redraw_clip.width != 0 &&
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/* some drivers struggle to get going and produce some junk
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* frames when starting up... */
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G_LIKELY (stage_cogl->frame_count > 3)
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#ifdef COGL_HAS_X11_SUPPORT
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/* While resizing a window clipped redraws are disabled to avoid
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* artefacts. See clutter-event-x11.c:event_translate for a
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* detailed explanation */
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&& G_LIKELY (stage_x11->clipped_redraws_cool_off == 0)
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#endif
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)
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{
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may_use_clipped_redraw = TRUE;
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}
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else
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may_use_clipped_redraw = FALSE;
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if (may_use_clipped_redraw &&
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G_LIKELY (!(clutter_paint_debug_flags &
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CLUTTER_DEBUG_DISABLE_CLIPPED_REDRAWS)))
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use_clipped_redraw = TRUE;
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else
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use_clipped_redraw = FALSE;
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if (use_clipped_redraw)
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{
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CLUTTER_NOTE (CLIPPING,
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"Stage clip pushed: x=%d, y=%d, width=%d, height=%d\n",
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stage_cogl->bounding_redraw_clip.x,
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stage_cogl->bounding_redraw_clip.y,
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stage_cogl->bounding_redraw_clip.width,
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stage_cogl->bounding_redraw_clip.height);
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cogl_clip_push_window_rectangle (stage_cogl->bounding_redraw_clip.x,
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stage_cogl->bounding_redraw_clip.y,
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stage_cogl->bounding_redraw_clip.width,
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stage_cogl->bounding_redraw_clip.height);
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_clutter_stage_do_paint (CLUTTER_STAGE (wrapper),
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&stage_cogl->bounding_redraw_clip);
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cogl_clip_pop ();
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}
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else
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{
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CLUTTER_NOTE (CLIPPING, "Unclipped stage paint\n");
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/* If we are trying to debug redraw issues then we want to pass
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* the bounding_redraw_clip so it can be visualized */
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if (G_UNLIKELY (clutter_paint_debug_flags &
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CLUTTER_DEBUG_DISABLE_CLIPPED_REDRAWS) &&
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may_use_clipped_redraw)
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{
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_clutter_stage_do_paint (CLUTTER_STAGE (wrapper),
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&stage_cogl->bounding_redraw_clip);
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}
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else
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_clutter_stage_do_paint (CLUTTER_STAGE (wrapper), NULL);
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}
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if (may_use_clipped_redraw &&
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G_UNLIKELY ((clutter_paint_debug_flags & CLUTTER_DEBUG_REDRAWS)))
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{
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static CoglMaterial *outline = NULL;
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ClutterGeometry *clip = &stage_cogl->bounding_redraw_clip;
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ClutterActor *actor = CLUTTER_ACTOR (wrapper);
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CoglHandle vbo;
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float x_1 = clip->x;
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float x_2 = clip->x + clip->width;
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float y_1 = clip->y;
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float y_2 = clip->y + clip->height;
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float quad[8] = {
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x_1, y_1,
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x_2, y_1,
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x_2, y_2,
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x_1, y_2
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};
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CoglMatrix modelview;
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if (outline == NULL)
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{
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outline = cogl_material_new ();
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cogl_material_set_color4ub (outline, 0xff, 0x00, 0x00, 0xff);
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}
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vbo = cogl_vertex_buffer_new (4);
|
|
cogl_vertex_buffer_add (vbo,
|
|
"gl_Vertex",
|
|
2, /* n_components */
|
|
COGL_ATTRIBUTE_TYPE_FLOAT,
|
|
FALSE, /* normalized */
|
|
0, /* stride */
|
|
quad);
|
|
cogl_vertex_buffer_submit (vbo);
|
|
|
|
cogl_push_matrix ();
|
|
cogl_matrix_init_identity (&modelview);
|
|
_clutter_actor_apply_modelview_transform (actor, &modelview);
|
|
cogl_set_modelview_matrix (&modelview);
|
|
cogl_set_source (outline);
|
|
cogl_vertex_buffer_draw (vbo, COGL_VERTICES_MODE_LINE_LOOP,
|
|
0 , 4);
|
|
cogl_pop_matrix ();
|
|
cogl_object_unref (vbo);
|
|
}
|
|
|
|
CLUTTER_TIMER_STOP (_clutter_uprof_context, painting_timer);
|
|
|
|
/* push on the screen */
|
|
if (use_clipped_redraw)
|
|
{
|
|
ClutterGeometry *clip = &stage_cogl->bounding_redraw_clip;
|
|
int copy_area[4];
|
|
ClutterActor *actor;
|
|
|
|
/* XXX: It seems there will be a race here in that the stage
|
|
* window may be resized before the cogl_framebuffer_swap_region
|
|
* is handled and so we may copy the wrong region. I can't
|
|
* really see how we can handle this with the current state of X
|
|
* but at least in this case a full redraw should be queued by
|
|
* the resize anyway so it should only exhibit temporary
|
|
* artefacts.
|
|
*/
|
|
|
|
actor = CLUTTER_ACTOR (wrapper);
|
|
copy_area[0] = clip->x;
|
|
copy_area[1] = clutter_actor_get_height (actor) - clip->y - clip->height;
|
|
copy_area[2] = clip->width;
|
|
copy_area[3] = clip->height;
|
|
|
|
CLUTTER_NOTE (BACKEND,
|
|
"cogl_framebuffer_swap_region (onscreen: %p, "
|
|
"x: %d, y: %d, "
|
|
"width: %d, height: %d)",
|
|
stage_cogl->onscreen,
|
|
copy_area[0], copy_area[1], copy_area[2], copy_area[3]);
|
|
|
|
|
|
CLUTTER_TIMER_START (_clutter_uprof_context, blit_sub_buffer_timer);
|
|
|
|
cogl_framebuffer_swap_region (COGL_FRAMEBUFFER (stage_cogl->onscreen),
|
|
copy_area, 1);
|
|
|
|
CLUTTER_TIMER_STOP (_clutter_uprof_context, blit_sub_buffer_timer);
|
|
}
|
|
else
|
|
{
|
|
CLUTTER_NOTE (BACKEND, "cogl_framebuffer_swap_buffers (onscreen: %p)",
|
|
stage_cogl->onscreen);
|
|
|
|
/* If we have swap buffer events then
|
|
* cogl_framebuffer_swap_buffers will return immediately and we
|
|
* need to track that there is a swap in progress... */
|
|
if (clutter_feature_available (CLUTTER_FEATURE_SWAP_EVENTS))
|
|
stage_cogl->pending_swaps++;
|
|
|
|
CLUTTER_TIMER_START (_clutter_uprof_context, swapbuffers_timer);
|
|
cogl_framebuffer_swap_buffers (COGL_FRAMEBUFFER (stage_cogl->onscreen));
|
|
CLUTTER_TIMER_STOP (_clutter_uprof_context, swapbuffers_timer);
|
|
}
|
|
|
|
/* reset the redraw clipping for the next paint... */
|
|
stage_cogl->initialized_redraw_clip = FALSE;
|
|
|
|
stage_cogl->frame_count++;
|
|
}
|
|
|
|
static CoglFramebuffer *
|
|
clutter_stage_cogl_get_active_framebuffer (ClutterStageWindow *stage_window)
|
|
{
|
|
ClutterStageCogl *stage_cogl = CLUTTER_STAGE_COGL (stage_window);
|
|
|
|
return COGL_FRAMEBUFFER (stage_cogl->onscreen);
|
|
}
|
|
|
|
static void
|
|
clutter_stage_window_iface_init (ClutterStageWindowIface *iface)
|
|
{
|
|
#ifdef COGL_HAS_X11_SUPPORT
|
|
clutter_stage_window_parent_iface = g_type_interface_peek_parent (iface);
|
|
|
|
iface->realize = clutter_stage_cogl_realize;
|
|
iface->unrealize = clutter_stage_cogl_unrealize;
|
|
|
|
/* the rest is inherited from ClutterStageX11 */
|
|
|
|
#else /* COGL_HAS_X11_SUPPORT */
|
|
|
|
iface->realize = clutter_stage_cogl_realize;
|
|
iface->unrealize = clutter_stage_cogl_unrealize;
|
|
iface->set_fullscreen = clutter_stage_cogl_set_fullscreen;
|
|
iface->set_title = clutter_stage_cogl_set_title;
|
|
iface->set_cursor_visible = clutter_stage_cogl_set_cursor_visible;
|
|
iface->get_wrapper = clutter_stage_cogl_get_wrapper;
|
|
iface->get_geometry = clutter_stage_cogl_get_geometry;
|
|
iface->resize = clutter_stage_cogl_resize;
|
|
iface->show = clutter_stage_cogl_show;
|
|
iface->hide = clutter_stage_cogl_hide;
|
|
|
|
#endif /* COGL_HAS_X11_SUPPORT */
|
|
|
|
iface->get_pending_swaps = clutter_stage_cogl_get_pending_swaps;
|
|
iface->add_redraw_clip = clutter_stage_cogl_add_redraw_clip;
|
|
iface->has_redraw_clips = clutter_stage_cogl_has_redraw_clips;
|
|
iface->ignoring_redraw_clips = clutter_stage_cogl_ignoring_redraw_clips;
|
|
iface->redraw = clutter_stage_cogl_redraw;
|
|
iface->get_active_framebuffer = clutter_stage_cogl_get_active_framebuffer;
|
|
}
|
|
|
|
#ifdef COGL_HAS_X11_SUPPORT
|
|
static void
|
|
clutter_stage_cogl_dispose (GObject *gobject)
|
|
{
|
|
G_OBJECT_CLASS (_clutter_stage_cogl_parent_class)->dispose (gobject);
|
|
}
|
|
|
|
static void
|
|
_clutter_stage_cogl_class_init (ClutterStageCoglClass *klass)
|
|
{
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
|
|
|
gobject_class->dispose = clutter_stage_cogl_dispose;
|
|
}
|
|
#else
|
|
static void
|
|
_clutter_stage_cogl_class_init (ClutterStageCoglClass *klass)
|
|
{
|
|
}
|
|
#endif /* COGL_HAS_X11_SUPPORT */
|
|
|
|
static void
|
|
_clutter_stage_cogl_init (ClutterStageCogl *stage)
|
|
{
|
|
}
|