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wayland: Add an actor for the cursor

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When running Mutter under Cogl's KMS backend no cursor will be
provided so instead this makes it so the cursor will be painted as a
CoglTexture that gets moved in response to mouse motion events. The
painting is done in a subclass of ClutterStage so that we can
guarantee that the cursor will be painted on top of everything else.

This patch adds support for the set_cursor method on the pointer
interface so that clients can change the cursor image.

The set_pointer method sets a surface and a hotspot position to use
for the cursor image. The surface's buffer is converted to a
CoglTexture and attached to a pipeline to paint directly via Cogl. If
a new buffer is attached to the surface the image will be updated. The
cursor reverts back to the default image whenever to the pointer focus
is moved off of any surface.

The image for the pointer is taken from X. It gets installed into
a fixed data location for mutter.
This commit is contained in:
Neil Roberts 2012-01-18 23:03:23 +00:00 committed by Jasper St. Pierre
parent 268ebb1b18
commit a5585327dc
10 changed files with 426 additions and 23 deletions
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2
Makefile.am
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@ -1,5 +1,5 @@
SUBDIRS=src protocol po doc
SUBDIRS=src protocol data po doc
EXTRA_DIST = HACKING MAINTAINERS rationales.txt

1
configure.ac
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@ -495,6 +495,7 @@ src/mutter-plugins.pc
src/tools/Makefile
src/compositor/plugins/Makefile
protocol/Makefile
data/Makefile
po/Makefile.in
])

7
data/Makefile.am Normal file
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@ -0,0 +1,7 @@
defaultcursordir = $(datadir)/mutter/cursors
dist_defaultcursor_DATA =
if HAVE_WAYLAND
dist_defaultcursor_DATA += left_ptr.png
endif

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data/left_ptr.png Normal file
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4
src/Makefile.am
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@ -187,7 +187,9 @@ libmutter_la_SOURCES += \
wayland/meta-wayland-pointer.c \
wayland/meta-wayland-pointer.h \
wayland/meta-wayland-seat.c \
wayland/meta-wayland-seat.h
wayland/meta-wayland-seat.h \
wayland/meta-wayland-stage.h \
wayland/meta-wayland-stage.c
endif
libmutter_la_LDFLAGS = -no-undefined

66
src/wayland/meta-wayland-seat.c
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@ -21,6 +21,7 @@
#include "config.h"
#include <cogl/cogl-wayland-server.h>
#include <clutter/clutter.h>
#include <clutter/wayland/clutter-wayland-compositor.h>
#include <clutter/wayland/clutter-wayland-surface.h>
@ -34,6 +35,7 @@
#include "meta-wayland-data-device.h"
#include "meta-window-actor-private.h"
#include "meta/meta-shaped-texture.h"
#include "meta-wayland-stage.h"
#define DEFAULT_AXIS_STEP_DISTANCE wl_fixed_from_int (10)
@ -71,23 +73,40 @@ transform_stage_point_fixed (MetaWaylandSurface *surface,
static void
pointer_unmap_sprite (MetaWaylandSeat *seat)
{
if (seat->current_stage)
{
MetaWaylandStage *stage = META_WAYLAND_STAGE (seat->current_stage);
meta_wayland_stage_set_invisible_cursor (stage);
}
if (seat->sprite)
{
if (seat->sprite->window)
{
GObject *window_actor_object =
meta_window_get_compositor_private (seat->sprite->window);
ClutterActor *window_actor = CLUTTER_ACTOR (window_actor_object);
if (window_actor)
clutter_actor_hide (window_actor);
}
wl_list_remove (&seat->sprite_destroy_listener.link);
seat->sprite = NULL;
}
}
void
meta_wayland_seat_update_sprite (MetaWaylandSeat *seat)
{
if (seat->current_stage)
{
MetaWaylandStage *stage = META_WAYLAND_STAGE (seat->current_stage);
ClutterBackend *backend = clutter_get_default_backend ();
CoglContext *context = clutter_backend_get_cogl_context (backend);
struct wl_resource *buffer = seat->sprite->buffer_ref.buffer->resource;
CoglTexture2D *texture =
cogl_wayland_texture_2d_new_from_buffer (context, buffer, NULL);
meta_wayland_stage_set_cursor_from_texture (stage,
COGL_TEXTURE (texture),
seat->hotspot_x,
seat->hotspot_y);
cogl_object_unref (texture);
}
}
static void
pointer_set_cursor (struct wl_client *client,
struct wl_resource *resource,
@ -109,17 +128,24 @@ pointer_set_cursor (struct wl_client *client,
if (seat->pointer.focus_serial - serial > G_MAXUINT32 / 2)
return;
pointer_unmap_sprite (seat);
if (!surface)
return;
wl_resource_add_destroy_listener (surface->resource,
&seat->sprite_destroy_listener);
seat->sprite = surface;
seat->hotspot_x = x;
seat->hotspot_y = y;
if (seat->sprite != surface)
{
pointer_unmap_sprite (seat);
if (!surface)
return;
wl_resource_add_destroy_listener (surface->resource,
&seat->sprite_destroy_listener);
seat->sprite = surface;
if (seat->sprite->buffer_ref.buffer)
meta_wayland_seat_update_sprite (seat);
}
}
static const struct wl_pointer_interface
@ -228,7 +254,7 @@ pointer_handle_sprite_destroy (struct wl_listener *listener, void *data)
MetaWaylandSeat *seat =
wl_container_of (listener, seat, sprite_destroy_listener);
seat->sprite = NULL;
pointer_unmap_sprite (seat);
}
MetaWaylandSeat *

3
src/wayland/meta-wayland-seat.h
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@ -41,6 +41,9 @@ meta_wayland_seat_repick (MetaWaylandSeat *seat,
uint32_t time,
ClutterActor *actor);
void
meta_wayland_seat_update_sprite (MetaWaylandSeat *seat);
void
meta_wayland_seat_free (MetaWaylandSeat *seat);

243
src/wayland/meta-wayland-stage.c Normal file
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@ -0,0 +1,243 @@
/*
* Wayland Support
*
* Copyright (C) 2012 Intel Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#include <config.h>
#include <clutter/clutter.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <cogl/cogl-wayland-server.h>
#include "meta-wayland-stage.h"
#include "meta/meta-window-actor.h"
#include "meta/meta-shaped-texture.h"
#define META_WAYLAND_DEFAULT_CURSOR_HOTSPOT_X 7
#define META_WAYLAND_DEFAULT_CURSOR_HOTSPOT_Y 4
G_DEFINE_TYPE (MetaWaylandStage, meta_wayland_stage, CLUTTER_TYPE_STAGE);
static void
meta_wayland_stage_finalize (GObject *object)
{
MetaWaylandStage *self = (MetaWaylandStage *) object;
cogl_object_unref (self->default_cursor_pipeline);
cogl_object_unref (self->texture_cursor_pipeline);
G_OBJECT_CLASS (meta_wayland_stage_parent_class)->finalize (object);
}
static void
get_cursor_draw_position (MetaWaylandStage *self,
cairo_rectangle_int_t *rect)
{
rect->x = self->cursor_x - self->cursor_hotspot_x;
rect->y = self->cursor_y - self->cursor_hotspot_y;
rect->width = self->cursor_width;
rect->height = self->cursor_height;
}
static void
draw_cursor_pipeline (MetaWaylandStage *self,
CoglPipeline *pipeline)
{
cairo_rectangle_int_t rect;
get_cursor_draw_position (self, &rect);
cogl_framebuffer_draw_rectangle (cogl_get_draw_framebuffer (),
pipeline,
rect.x, rect.y,
rect.x + rect.width,
rect.y + rect.height);
self->has_last_cursor_position = TRUE;
self->last_cursor_position = rect;
}
static void
meta_wayland_stage_paint (ClutterActor *actor)
{
MetaWaylandStage *self = META_WAYLAND_STAGE (actor);
CLUTTER_ACTOR_CLASS (meta_wayland_stage_parent_class)->paint (actor);
/* Make sure the cursor is always painted on top of all of the other
actors */
switch (self->cursor_type)
{
case META_WAYLAND_STAGE_CURSOR_INVISIBLE:
break;
case META_WAYLAND_STAGE_CURSOR_DEFAULT:
draw_cursor_pipeline (self, self->default_cursor_pipeline);
break;
case META_WAYLAND_STAGE_CURSOR_TEXTURE:
draw_cursor_pipeline (self, self->texture_cursor_pipeline);
break;
}
}
static void
update_cursor_position (MetaWaylandStage *self)
{
cairo_rectangle_int_t rect;
if (self->has_last_cursor_position)
{
clutter_actor_queue_redraw_with_clip (CLUTTER_ACTOR (self),
&self->last_cursor_position);
self->has_last_cursor_position = FALSE;
}
get_cursor_draw_position (self, &rect);
if (rect.width != 0 && rect.height != 0)
clutter_actor_queue_redraw_with_clip (CLUTTER_ACTOR (self), &rect);
}
static void
meta_wayland_stage_class_init (MetaWaylandStageClass *klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
ClutterActorClass *actor_class = (ClutterActorClass *) klass;
gobject_class->finalize = meta_wayland_stage_finalize;
actor_class->paint = meta_wayland_stage_paint;
}
static void
load_default_cursor_pipeline (MetaWaylandStage *self)
{
CoglContext *context =
clutter_backend_get_cogl_context (clutter_get_default_backend ());
CoglTexture *texture;
CoglError *error = NULL;
char *filename;
filename = g_build_filename (MUTTER_DATADIR,
"mutter/cursors/left_ptr.png",
NULL);
texture = cogl_texture_new_from_file (filename,
COGL_TEXTURE_NONE,
COGL_PIXEL_FORMAT_ANY,
&error);
g_free (filename);
self->default_cursor_pipeline = cogl_pipeline_new (context);
cogl_pipeline_set_layer_filters (self->default_cursor_pipeline,
0, /* layer */
COGL_PIPELINE_FILTER_NEAREST,
COGL_PIPELINE_FILTER_NEAREST);
if (texture == NULL)
{
g_warning ("Failed to load default cursor: %s",
error->message);
cogl_error_free (error);
}
else
{
self->default_cursor_width = cogl_texture_get_width (texture);
self->default_cursor_height = cogl_texture_get_height (texture);
cogl_pipeline_set_layer_texture (self->default_cursor_pipeline,
0, /* layer */
texture);
cogl_object_unref (texture);
}
}
static void
meta_wayland_stage_init (MetaWaylandStage *self)
{
load_default_cursor_pipeline (self);
self->texture_cursor_pipeline =
cogl_pipeline_copy (self->default_cursor_pipeline);
meta_wayland_stage_set_default_cursor (self);
}
ClutterActor *
meta_wayland_stage_new (void)
{
return g_object_new (META_WAYLAND_TYPE_STAGE,
"cursor-visible", FALSE,
NULL);
}
void
meta_wayland_stage_set_cursor_position (MetaWaylandStage *self,
int x,
int y)
{
self->cursor_x = x;
self->cursor_y = y;
update_cursor_position (self);
}
void
meta_wayland_stage_set_cursor_from_texture (MetaWaylandStage *self,
CoglTexture *texture,
int hotspot_x,
int hotspot_y)
{
CoglPipeline *pipeline;
self->cursor_hotspot_x = hotspot_x;
self->cursor_hotspot_y = hotspot_y;
self->cursor_type = META_WAYLAND_STAGE_CURSOR_TEXTURE;
pipeline = cogl_pipeline_copy (self->texture_cursor_pipeline);
cogl_pipeline_set_layer_texture (pipeline, 0, texture);
cogl_object_unref (self->texture_cursor_pipeline);
self->texture_cursor_pipeline = pipeline;
self->cursor_width = cogl_texture_get_width (texture);
self->cursor_height = cogl_texture_get_height (texture);
update_cursor_position (self);
}
void
meta_wayland_stage_set_invisible_cursor (MetaWaylandStage *self)
{
self->cursor_type = META_WAYLAND_STAGE_CURSOR_INVISIBLE;
self->cursor_width = 0;
self->cursor_height = 0;
update_cursor_position (self);
}
void
meta_wayland_stage_set_default_cursor (MetaWaylandStage *self)
{
self->cursor_type = META_WAYLAND_STAGE_CURSOR_DEFAULT;
self->cursor_hotspot_x = META_WAYLAND_DEFAULT_CURSOR_HOTSPOT_X;
self->cursor_hotspot_y = META_WAYLAND_DEFAULT_CURSOR_HOTSPOT_Y;
self->cursor_width = self->default_cursor_width;
self->cursor_height = self->default_cursor_height;
update_cursor_position (self);
}

111
src/wayland/meta-wayland-stage.h Normal file
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@ -0,0 +1,111 @@
/*
* Copyright (C) 2012 Intel Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#ifndef META_WAYLAND_STAGE_H
#define META_WAYLAND_STAGE_H
#include <clutter/clutter.h>
#include <wayland-server.h>
#include "window-private.h"
G_BEGIN_DECLS
#define META_WAYLAND_TYPE_STAGE \
(meta_wayland_stage_get_type())
#define META_WAYLAND_STAGE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST ((obj), \
META_WAYLAND_TYPE_STAGE, \
MetaWaylandStage))
#define META_WAYLAND_STAGE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST ((klass), \
META_WAYLAND_TYPE_STAGE, \
MetaWaylandStageClass))
#define META_WAYLAND_IS_STAGE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE ((obj), \
META_WAYLAND_TYPE_STAGE))
#define META_WAYLAND_IS_STAGE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE ((klass), \
META_WAYLAND_TYPE_STAGE))
#define META_WAYLAND_STAGE_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS ((obj), \
META_WAYLAND_STAGE, \
MetaWaylandStageClass))
typedef struct _MetaWaylandStage MetaWaylandStage;
typedef struct _MetaWaylandStageClass MetaWaylandStageClass;
struct _MetaWaylandStageClass
{
ClutterStageClass parent_class;
};
struct _MetaWaylandStage
{
ClutterStage parent;
/* A pipeline containing the cursor texture that will be used when
the cursor is not over a surface */
CoglPipeline *default_cursor_pipeline;
int default_cursor_width;
int default_cursor_height;
CoglPipeline *texture_cursor_pipeline;
int cursor_x;
int cursor_y;
int cursor_width;
int cursor_height;
int cursor_hotspot_x;
int cursor_hotspot_y;
enum
{
/* No cursor will be drawn */
META_WAYLAND_STAGE_CURSOR_INVISIBLE,
/* The cursor will be drawn from our default cursor image */
META_WAYLAND_STAGE_CURSOR_DEFAULT,
/* The cursor will be drawn using a custom texture */
META_WAYLAND_STAGE_CURSOR_TEXTURE
} cursor_type;
gboolean has_last_cursor_position;
cairo_rectangle_int_t last_cursor_position;
};
GType meta_wayland_stage_get_type (void) G_GNUC_CONST;
ClutterActor *meta_wayland_stage_new (void);
void meta_wayland_stage_set_cursor_position (MetaWaylandStage *stage,
int x,
int y);
void meta_wayland_stage_set_default_cursor (MetaWaylandStage *self);
void meta_wayland_stage_set_cursor_from_texture (MetaWaylandStage *self,
CoglTexture *texture,
int hotspot_x,
int hotspot_y);
void meta_wayland_stage_set_invisible_cursor (MetaWaylandStage *self);
G_END_DECLS
#endif /* META_WAYLAND_STAGE_H */

12
src/wayland/meta-wayland.c
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@ -39,6 +39,7 @@
#include "meta-wayland-private.h"
#include "meta-xwayland-private.h"
#include "meta-wayland-stage.h"
#include "meta-window-actor-private.h"
#include "meta-wayland-seat.h"
#include "meta-wayland-keyboard.h"
@ -368,6 +369,8 @@ meta_wayland_surface_commit (struct wl_client *client,
(buffer->width != rect.width || buffer->height != rect.height))
meta_window_resize (surface->window, FALSE, buffer->width, buffer->height);
}
else if (surface == compositor->seat->sprite)
meta_wayland_seat_update_sprite (compositor->seat);
}
}
@ -1200,6 +1203,13 @@ event_cb (ClutterActor *stage,
}
}
meta_wayland_stage_set_cursor_position (META_WAYLAND_STAGE (stage),
wl_fixed_to_int (pointer->x),
wl_fixed_to_int (pointer->y));
if (pointer->current == NULL)
meta_wayland_stage_set_default_cursor (META_WAYLAND_STAGE (stage));
display = meta_get_display ();
if (!display)
return FALSE;
@ -1326,7 +1336,7 @@ meta_wayland_init (void)
if (clutter_init (NULL, NULL) != CLUTTER_INIT_SUCCESS)
g_error ("Failed to initialize Clutter");
compositor->stage = clutter_stage_new ();
compositor->stage = meta_wayland_stage_new ();
clutter_stage_set_user_resizable (CLUTTER_STAGE (compositor->stage), FALSE);
g_signal_connect_after (compositor->stage, "paint",
G_CALLBACK (paint_finished_cb), compositor);