dd1eaeb262
Use the correct pointer types for cogl objects. This avoids warnings when including the cogl headers doesn't result in all the cogl types being typedefs to void. https://bugzilla.gnome.org/show_bug.cgi?id=768976
438 lines
11 KiB
C
438 lines
11 KiB
C
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
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/*
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* Copyright 2013 Red Hat, Inc.
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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, see <http://www.gnu.org/licenses/>.
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*
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* Author: Giovanni Campagna <gcampagn@redhat.com>
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*/
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/**
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* SECTION:cursor-tracker
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* @title: MetaCursorTracker
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* @short_description: Mutter cursor tracking helper. Originally only
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* tracking the cursor image, now more of a "core
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* pointer abstraction"
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*/
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#include "config.h"
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#include "meta-cursor-tracker-private.h"
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#include <string.h>
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#include <meta/main.h>
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#include <meta/util.h>
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#include <meta/errors.h>
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#include <cogl/cogl.h>
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#include <clutter/clutter.h>
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#include <gdk/gdk.h>
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#include <gdk/gdkx.h>
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#include <X11/extensions/Xfixes.h>
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#include "meta-backend-private.h"
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G_DEFINE_TYPE (MetaCursorTracker, meta_cursor_tracker, G_TYPE_OBJECT);
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enum {
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CURSOR_CHANGED,
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LAST_SIGNAL
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};
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static guint signals[LAST_SIGNAL];
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static MetaCursorSprite *
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get_displayed_cursor (MetaCursorTracker *tracker)
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{
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MetaDisplay *display = meta_get_display ();
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if (!tracker->is_showing)
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return NULL;
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if (meta_display_windows_are_interactable (display))
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{
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if (tracker->has_window_cursor)
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return tracker->window_cursor;
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}
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return tracker->root_cursor;
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}
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static void
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update_displayed_cursor (MetaCursorTracker *tracker)
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{
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meta_cursor_renderer_set_cursor (tracker->renderer, tracker->displayed_cursor);
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}
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static void
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sync_cursor (MetaCursorTracker *tracker)
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{
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MetaCursorSprite *displayed_cursor = get_displayed_cursor (tracker);
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if (tracker->displayed_cursor == displayed_cursor)
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return;
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g_clear_object (&tracker->displayed_cursor);
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if (displayed_cursor)
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tracker->displayed_cursor = g_object_ref (displayed_cursor);
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update_displayed_cursor (tracker);
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g_signal_emit (tracker, signals[CURSOR_CHANGED], 0);
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}
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static void
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meta_cursor_tracker_init (MetaCursorTracker *self)
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{
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MetaBackend *backend = meta_get_backend ();
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self->renderer = meta_backend_get_cursor_renderer (backend);
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self->is_showing = TRUE;
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}
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static void
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meta_cursor_tracker_finalize (GObject *object)
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{
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MetaCursorTracker *self = META_CURSOR_TRACKER (object);
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if (self->displayed_cursor)
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g_object_unref (self->displayed_cursor);
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if (self->root_cursor)
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g_object_unref (self->root_cursor);
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G_OBJECT_CLASS (meta_cursor_tracker_parent_class)->finalize (object);
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}
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static void
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meta_cursor_tracker_class_init (MetaCursorTrackerClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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object_class->finalize = meta_cursor_tracker_finalize;
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signals[CURSOR_CHANGED] = g_signal_new ("cursor-changed",
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST,
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0,
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NULL, NULL, NULL,
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G_TYPE_NONE, 0);
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}
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static MetaCursorTracker *
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meta_cursor_tracker_new (void)
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{
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return g_object_new (META_TYPE_CURSOR_TRACKER, NULL);
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}
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static MetaCursorTracker *_cursor_tracker;
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/**
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* meta_cursor_tracker_get_for_screen:
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* @screen: the #MetaScreen
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*
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* Retrieves the cursor tracker object for @screen.
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*
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* Returns: (transfer none):
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*/
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MetaCursorTracker *
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meta_cursor_tracker_get_for_screen (MetaScreen *screen)
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{
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if (!_cursor_tracker)
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_cursor_tracker = meta_cursor_tracker_new ();
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return _cursor_tracker;
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}
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static void
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set_window_cursor (MetaCursorTracker *tracker,
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gboolean has_cursor,
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MetaCursorSprite *cursor_sprite)
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{
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g_clear_object (&tracker->window_cursor);
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if (cursor_sprite)
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tracker->window_cursor = g_object_ref (cursor_sprite);
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tracker->has_window_cursor = has_cursor;
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sync_cursor (tracker);
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}
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gboolean
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meta_cursor_tracker_handle_xevent (MetaCursorTracker *tracker,
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XEvent *xevent)
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{
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MetaDisplay *display = meta_get_display ();
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XFixesCursorNotifyEvent *notify_event;
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if (meta_is_wayland_compositor ())
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return FALSE;
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if (xevent->xany.type != display->xfixes_event_base + XFixesCursorNotify)
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return FALSE;
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notify_event = (XFixesCursorNotifyEvent *)xevent;
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if (notify_event->subtype != XFixesDisplayCursorNotify)
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return FALSE;
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g_clear_object (&tracker->xfixes_cursor);
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g_signal_emit (tracker, signals[CURSOR_CHANGED], 0);
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return TRUE;
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}
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static void
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ensure_xfixes_cursor (MetaCursorTracker *tracker)
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{
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MetaDisplay *display = meta_get_display ();
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XFixesCursorImage *cursor_image;
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CoglTexture2D *sprite;
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guint8 *cursor_data;
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gboolean free_cursor_data;
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CoglContext *ctx;
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CoglError *error = NULL;
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if (tracker->xfixes_cursor)
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return;
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cursor_image = XFixesGetCursorImage (display->xdisplay);
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if (!cursor_image)
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return;
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/* Like all X APIs, XFixesGetCursorImage() returns arrays of 32-bit
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* quantities as arrays of long; we need to convert on 64 bit */
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if (sizeof(long) == 4)
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{
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cursor_data = (guint8 *)cursor_image->pixels;
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free_cursor_data = FALSE;
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}
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else
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{
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int i, j;
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guint32 *cursor_words;
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gulong *p;
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guint32 *q;
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cursor_words = g_new (guint32, cursor_image->width * cursor_image->height);
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cursor_data = (guint8 *)cursor_words;
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p = cursor_image->pixels;
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q = cursor_words;
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for (j = 0; j < cursor_image->height; j++)
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for (i = 0; i < cursor_image->width; i++)
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*(q++) = *(p++);
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free_cursor_data = TRUE;
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}
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ctx = clutter_backend_get_cogl_context (clutter_get_default_backend ());
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sprite = cogl_texture_2d_new_from_data (ctx,
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cursor_image->width,
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cursor_image->height,
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CLUTTER_CAIRO_FORMAT_ARGB32,
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cursor_image->width * 4, /* stride */
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cursor_data,
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&error);
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if (free_cursor_data)
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g_free (cursor_data);
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if (error != NULL)
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{
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meta_warning ("Failed to allocate cursor sprite texture: %s\n", error->message);
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cogl_error_free (error);
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}
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if (sprite != NULL)
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{
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MetaCursorSprite *cursor_sprite = meta_cursor_sprite_new ();
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meta_cursor_sprite_set_texture (cursor_sprite,
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COGL_TEXTURE (sprite),
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cursor_image->xhot,
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cursor_image->yhot);
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cogl_object_unref (sprite);
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tracker->xfixes_cursor = cursor_sprite;
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}
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XFree (cursor_image);
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}
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/**
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* meta_cursor_tracker_get_sprite:
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*
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* Returns: (transfer none):
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*/
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CoglTexture *
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meta_cursor_tracker_get_sprite (MetaCursorTracker *tracker)
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{
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MetaCursorSprite *cursor_sprite;
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g_return_val_if_fail (META_IS_CURSOR_TRACKER (tracker), NULL);
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if (meta_is_wayland_compositor ())
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{
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cursor_sprite = tracker->displayed_cursor;
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}
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else
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{
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ensure_xfixes_cursor (tracker);
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cursor_sprite = tracker->xfixes_cursor;
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}
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if (cursor_sprite)
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return meta_cursor_sprite_get_cogl_texture (cursor_sprite);
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else
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return NULL;
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}
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/**
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* meta_cursor_tracker_get_hot:
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* @tracker:
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* @x: (out):
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* @y: (out):
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*
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*/
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void
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meta_cursor_tracker_get_hot (MetaCursorTracker *tracker,
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int *x,
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int *y)
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{
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MetaCursorSprite *cursor_sprite;
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g_return_if_fail (META_IS_CURSOR_TRACKER (tracker));
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if (meta_is_wayland_compositor ())
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{
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cursor_sprite = tracker->displayed_cursor;
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}
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else
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{
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ensure_xfixes_cursor (tracker);
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cursor_sprite = tracker->xfixes_cursor;
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}
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if (cursor_sprite)
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meta_cursor_sprite_get_hotspot (cursor_sprite, x, y);
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else
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{
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if (x)
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*x = 0;
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if (y)
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*y = 0;
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}
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}
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void
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meta_cursor_tracker_set_window_cursor (MetaCursorTracker *tracker,
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MetaCursorSprite *cursor_sprite)
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{
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set_window_cursor (tracker, TRUE, cursor_sprite);
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}
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void
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meta_cursor_tracker_unset_window_cursor (MetaCursorTracker *tracker)
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{
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set_window_cursor (tracker, FALSE, NULL);
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}
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void
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meta_cursor_tracker_set_root_cursor (MetaCursorTracker *tracker,
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MetaCursorSprite *cursor_sprite)
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{
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g_clear_object (&tracker->root_cursor);
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if (cursor_sprite)
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tracker->root_cursor = g_object_ref (cursor_sprite);
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sync_cursor (tracker);
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}
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void
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meta_cursor_tracker_update_position (MetaCursorTracker *tracker,
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int new_x,
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int new_y)
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{
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g_assert (meta_is_wayland_compositor ());
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meta_cursor_renderer_set_position (tracker->renderer, new_x, new_y);
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}
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static void
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get_pointer_position_gdk (int *x,
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int *y,
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int *mods)
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{
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GdkSeat *gseat;
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GdkDevice *gdevice;
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GdkScreen *gscreen;
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gseat = gdk_display_get_default_seat (gdk_display_get_default ());
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gdevice = gdk_seat_get_pointer (gseat);
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gdk_device_get_position (gdevice, &gscreen, x, y);
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if (mods)
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gdk_device_get_state (gdevice,
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gdk_screen_get_root_window (gscreen),
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NULL, (GdkModifierType*)mods);
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}
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static void
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get_pointer_position_clutter (int *x,
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int *y,
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int *mods)
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{
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ClutterDeviceManager *cmanager;
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ClutterInputDevice *cdevice;
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ClutterPoint point;
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cmanager = clutter_device_manager_get_default ();
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cdevice = clutter_device_manager_get_core_device (cmanager, CLUTTER_POINTER_DEVICE);
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clutter_input_device_get_coords (cdevice, NULL, &point);
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if (x)
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*x = point.x;
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if (y)
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*y = point.y;
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if (mods)
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*mods = clutter_input_device_get_modifier_state (cdevice);
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}
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void
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meta_cursor_tracker_get_pointer (MetaCursorTracker *tracker,
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int *x,
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int *y,
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ClutterModifierType *mods)
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{
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/* We can't use the clutter interface when not running as a wayland compositor,
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because we need to query the server, rather than using the last cached value.
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OTOH, on wayland we can't use GDK, because that only sees the events
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we forward to xwayland.
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*/
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if (meta_is_wayland_compositor ())
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get_pointer_position_clutter (x, y, (int*)mods);
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else
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get_pointer_position_gdk (x, y, (int*)mods);
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}
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void
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meta_cursor_tracker_set_pointer_visible (MetaCursorTracker *tracker,
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gboolean visible)
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{
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if (visible == tracker->is_showing)
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return;
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tracker->is_showing = visible;
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sync_cursor (tracker);
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}
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MetaCursorSprite *
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meta_cursor_tracker_get_displayed_cursor (MetaCursorTracker *tracker)
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{
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return tracker->displayed_cursor;
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}
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