362ab781dd
All the upper layers are prepared for multiple onscreen cursors, but this. All MetaCursorRenderers created would poke the same internal MetaOverlay in the stage. This will lead to multiple cursor renderers resorting to the "SW" rendering paths (as it can be seen with tablet support) to reuse the same overlay, thus leading to flickering when a different MetaCursorRenderer takes over the overlay. Fix this by allowing per-cursor-renderer overlays, their lifetime is attached to the cursor renderer, so is expected to be tear down if the relevant device (eg. tablet) disappears.
301 lines
8.0 KiB
C
301 lines
8.0 KiB
C
/*
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* Copyright (C) 2014 Red Hat
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* 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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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*
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* Written by:
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* Jasper St. Pierre <jstpierre@mecheye.net>
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*/
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#include <config.h>
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#include "meta-stage.h"
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#include <meta/meta-backend.h>
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#include <meta/util.h>
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struct _MetaOverlay {
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gboolean enabled;
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CoglPipeline *pipeline;
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CoglTexture *texture;
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MetaRectangle current_rect;
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MetaRectangle previous_rect;
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gboolean previous_is_valid;
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};
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struct _MetaStagePrivate {
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GList *overlays;
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gboolean is_active;
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};
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typedef struct _MetaStagePrivate MetaStagePrivate;
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G_DEFINE_TYPE_WITH_PRIVATE (MetaStage, meta_stage, CLUTTER_TYPE_STAGE);
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static MetaOverlay *
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meta_overlay_new ()
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{
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MetaOverlay *overlay;
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CoglContext *ctx = clutter_backend_get_cogl_context (clutter_get_default_backend ());
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overlay = g_slice_new0 (MetaOverlay);
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overlay->pipeline = cogl_pipeline_new (ctx);
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return overlay;
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}
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static void
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meta_overlay_free (MetaOverlay *overlay)
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{
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if (overlay->pipeline)
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cogl_object_unref (overlay->pipeline);
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g_slice_free (MetaOverlay, overlay);
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}
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static void
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meta_overlay_set (MetaOverlay *overlay,
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CoglTexture *texture,
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MetaRectangle *rect)
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{
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if (overlay->texture != texture)
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{
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overlay->texture = texture;
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if (texture)
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{
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cogl_pipeline_set_layer_texture (overlay->pipeline, 0, texture);
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overlay->enabled = TRUE;
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}
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else
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{
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cogl_pipeline_set_layer_texture (overlay->pipeline, 0, NULL);
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overlay->enabled = FALSE;
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}
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}
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overlay->current_rect = *rect;
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}
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static void
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meta_overlay_paint (MetaOverlay *overlay)
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{
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if (!overlay->enabled)
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return;
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g_assert (meta_is_wayland_compositor ());
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cogl_framebuffer_draw_rectangle (cogl_get_draw_framebuffer (),
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overlay->pipeline,
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overlay->current_rect.x,
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overlay->current_rect.y,
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overlay->current_rect.x +
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overlay->current_rect.width,
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overlay->current_rect.y +
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overlay->current_rect.height);
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overlay->previous_rect = overlay->current_rect;
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overlay->previous_is_valid = TRUE;
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}
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static void
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meta_stage_finalize (GObject *object)
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{
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MetaStage *stage = META_STAGE (object);
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MetaStagePrivate *priv = meta_stage_get_instance_private (stage);
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GList *l = priv->overlays;
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while (l)
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{
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meta_overlay_free (l->data);
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l = g_list_delete_link (l, l);
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}
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G_OBJECT_CLASS (meta_stage_parent_class)->finalize (object);
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}
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static void
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meta_stage_paint (ClutterActor *actor)
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{
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MetaStage *stage = META_STAGE (actor);
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MetaStagePrivate *priv = meta_stage_get_instance_private (stage);
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GList *l;
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CLUTTER_ACTOR_CLASS (meta_stage_parent_class)->paint (actor);
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for (l = priv->overlays; l; l = l->next)
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meta_overlay_paint (l->data);
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}
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static void
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meta_stage_activate (ClutterStage *actor)
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{
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MetaStage *stage = META_STAGE (actor);
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MetaStagePrivate *priv = meta_stage_get_instance_private (stage);
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CLUTTER_STAGE_CLASS (meta_stage_parent_class)->activate (actor);
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priv->is_active = TRUE;
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}
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static void
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meta_stage_deactivate (ClutterStage *actor)
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{
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MetaStage *stage = META_STAGE (actor);
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MetaStagePrivate *priv = meta_stage_get_instance_private (stage);
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CLUTTER_STAGE_CLASS (meta_stage_parent_class)->deactivate (actor);
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priv->is_active = FALSE;
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}
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static void
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meta_stage_class_init (MetaStageClass *klass)
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{
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ClutterStageClass *stage_class = (ClutterStageClass *) klass;
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ClutterActorClass *actor_class = (ClutterActorClass *) klass;
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GObjectClass *object_class = (GObjectClass *) klass;
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object_class->finalize = meta_stage_finalize;
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actor_class->paint = meta_stage_paint;
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stage_class->activate = meta_stage_activate;
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stage_class->deactivate = meta_stage_deactivate;
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}
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static void
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meta_stage_init (MetaStage *stage)
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{
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clutter_stage_set_user_resizable (CLUTTER_STAGE (stage), FALSE);
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}
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ClutterActor *
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meta_stage_new (void)
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{
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return g_object_new (META_TYPE_STAGE,
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"cursor-visible", FALSE,
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NULL);
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}
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static void
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queue_redraw_for_overlay (MetaStage *stage,
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MetaOverlay *overlay)
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{
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cairo_rectangle_int_t clip;
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/* Clear the location the overlay was at before, if we need to. */
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if (overlay->previous_is_valid)
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{
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clip.x = overlay->previous_rect.x;
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clip.y = overlay->previous_rect.y;
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clip.width = overlay->previous_rect.width;
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clip.height = overlay->previous_rect.height;
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clutter_actor_queue_redraw_with_clip (CLUTTER_ACTOR (stage), &clip);
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overlay->previous_is_valid = FALSE;
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}
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/* Draw the overlay at the new position */
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if (overlay->enabled)
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{
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clip.x = overlay->current_rect.x;
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clip.y = overlay->current_rect.y;
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clip.width = overlay->current_rect.width;
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clip.height = overlay->current_rect.height;
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clutter_actor_queue_redraw_with_clip (CLUTTER_ACTOR (stage), &clip);
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}
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}
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MetaOverlay *
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meta_stage_create_cursor_overlay (MetaStage *stage)
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{
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MetaStagePrivate *priv = meta_stage_get_instance_private (stage);
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MetaOverlay *overlay;
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overlay = meta_overlay_new ();
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priv->overlays = g_list_prepend (priv->overlays, overlay);
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return overlay;
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}
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void
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meta_stage_remove_cursor_overlay (MetaStage *stage,
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MetaOverlay *overlay)
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{
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MetaStagePrivate *priv = meta_stage_get_instance_private (stage);
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GList *link;
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link = g_list_find (priv->overlays, overlay);
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if (!link)
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return;
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priv->overlays = g_list_delete_link (priv->overlays, link);
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meta_overlay_free (overlay);
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}
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void
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meta_stage_update_cursor_overlay (MetaStage *stage,
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MetaOverlay *overlay,
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CoglTexture *texture,
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MetaRectangle *rect)
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{
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g_assert (meta_is_wayland_compositor () || texture == NULL);
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meta_overlay_set (overlay, texture, rect);
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queue_redraw_for_overlay (stage, overlay);
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}
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void
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meta_stage_set_active (MetaStage *stage,
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gboolean is_active)
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{
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MetaStagePrivate *priv = meta_stage_get_instance_private (stage);
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ClutterEvent event = { 0 };
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/* Used by the native backend to inform accessibility technologies
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* about when the stage loses and gains input focus.
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*
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* For the X11 backend, clutter transparently takes care of this
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* for us.
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*/
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if (priv->is_active == is_active)
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return;
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event.type = CLUTTER_STAGE_STATE;
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clutter_event_set_stage (&event, CLUTTER_STAGE (stage));
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event.stage_state.changed_mask = CLUTTER_STAGE_STATE_ACTIVATED;
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if (is_active)
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event.stage_state.new_state = CLUTTER_STAGE_STATE_ACTIVATED;
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/* Emitting this StageState event will result in the stage getting
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* activated or deactivated (with the activated or deactivated signal
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* getting emitted from the stage)
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*
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* FIXME: This won't update ClutterStage's own notion of its
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* activeness. For that we would need to somehow trigger a
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* _clutter_stage_update_state call, which will probably
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* require new API in clutter. In practice, nothing relies
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* on the ClutterStage's own notion of activeness when using
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* the EGL backend.
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*
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* See http://bugzilla.gnome.org/746670
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*/
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clutter_stage_event (CLUTTER_STAGE (stage), &event);
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}
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