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gdk: Add gdk_cursor_new_from_surface

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We need this to be able to handle scaled cursor images.
We implement the new _from_pixbuf by converting to a surface and
assuming the scale was 1.
This commit is contained in:
Alexander Larsson 2013-08-07 12:18:38 +02:00
parent 71fe43543c
commit b2113b7384
13 changed files with 220 additions and 167 deletions
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8
gdk/broadway/gdkcursor-broadway.c
View File

@ -118,10 +118,10 @@ _gdk_broadway_cursor_update_theme (GdkCursor *cursor)
}
GdkCursor *
_gdk_broadway_display_get_cursor_for_pixbuf (GdkDisplay *display,
GdkPixbuf *pixbuf,
gint x,
gint y)
_gdk_broadway_display_get_cursor_for_surface (GdkDisplay *display,
cairo_surface_t *surface,
gdouble x,
gdouble y)
{
GdkBroadwayCursor *private;
GdkCursor *cursor;

2
gdk/broadway/gdkdisplay-broadway.c
View File

@ -375,7 +375,7 @@ gdk_broadway_display_class_init (GdkBroadwayDisplayClass * class)
display_class->list_devices = gdk_broadway_display_list_devices;
display_class->get_cursor_for_type = _gdk_broadway_display_get_cursor_for_type;
display_class->get_cursor_for_name = _gdk_broadway_display_get_cursor_for_name;
display_class->get_cursor_for_pixbuf = _gdk_broadway_display_get_cursor_for_pixbuf;
display_class->get_cursor_for_surface = _gdk_broadway_display_get_cursor_for_surface;
display_class->get_default_cursor_size = _gdk_broadway_display_get_default_cursor_size;
display_class->get_maximal_cursor_size = _gdk_broadway_display_get_maximal_cursor_size;
display_class->supports_cursor_alpha = _gdk_broadway_display_supports_cursor_alpha;

8
gdk/broadway/gdkprivate-broadway.h
View File

@ -125,10 +125,10 @@ GdkCursor*_gdk_broadway_display_get_cursor_for_type (GdkDisplay *display,
GdkCursorType cursor_type);
GdkCursor*_gdk_broadway_display_get_cursor_for_name (GdkDisplay *display,
const gchar *name);
GdkCursor *_gdk_broadway_display_get_cursor_for_pixbuf (GdkDisplay *display,
GdkPixbuf *pixbuf,
gint x,
gint y);
GdkCursor *_gdk_broadway_display_get_cursor_for_surface (GdkDisplay *display,
cairo_surface_t *surface,
gdouble x,
gdouble y);
gboolean _gdk_broadway_display_supports_cursor_alpha (GdkDisplay *display);
gboolean _gdk_broadway_display_supports_cursor_color (GdkDisplay *display);
void _gdk_broadway_display_get_default_cursor_size (GdkDisplay *display,

72
gdk/gdkcursor.c
View File

@ -34,6 +34,7 @@
#include "gdkinternals.h"
#include <math.h>
#include <errno.h>
/**
* SECTION:cursors
@ -351,12 +352,81 @@ gdk_cursor_new_from_pixbuf (GdkDisplay *display,
gint x,
gint y)
{
cairo_surface_t *surface;
const char *option;
char *end;
gint64 value;
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
return GDK_DISPLAY_GET_CLASS (display)->get_cursor_for_pixbuf (display, pixbuf, x, y);
if (x == -1 && (option = gdk_pixbuf_get_option (pixbuf, "x_hot")))
{
errno = 0;
end = NULL;
value = g_ascii_strtoll (option, &end, 10);
if (errno == 0 &&
end != option &&
value >= 0 && value < G_MAXINT)
x = (gint) value;
}
if (y == -1 && (option = gdk_pixbuf_get_option (pixbuf, "y_hot")))
{
errno = 0;
end = NULL;
value = g_ascii_strtoll (option, &end, 10);
if (errno == 0 &&
end != option &&
value >= 0 && value < G_MAXINT)
y = (gint) value;
}
surface = gdk_cairo_surface_create_from_pixbuf (pixbuf, 1, NULL);
return GDK_DISPLAY_GET_CLASS (display)->get_cursor_for_surface (display, surface, x, y);
}
/**
* gdk_cursor_new_from_surface:
* @display: the #GdkDisplay for which the cursor will be created
* @surface: the cairo image surface containing the cursor pixel data
* @x: the horizontal offset of the 'hotspot' of the cursor.
* @y: the vertical offset of the 'hotspot' of the cursor.
*
* Creates a new cursor from a pixbuf.
*
* Not all GDK backends support RGBA cursors. If they are not
* supported, a monochrome approximation will be displayed.
* The functions gdk_display_supports_cursor_alpha() and
* gdk_display_supports_cursor_color() can be used to determine
* whether RGBA cursors are supported;
* gdk_display_get_default_cursor_size() and
* gdk_display_get_maximal_cursor_size() give information about
* cursor sizes.
*
* On the X backend, support for RGBA cursors requires a
* sufficently new version of the X Render extension.
*
* Returns: a new #GdkCursor.
*
* Since: 3.10
*/
GdkCursor *
gdk_cursor_new_from_surface (GdkDisplay *display,
cairo_surface_t *surface,
gdouble x,
gdouble y)
{
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
g_return_val_if_fail (surface != NULL, NULL);
g_return_val_if_fail (cairo_surface_get_type (surface) == CAIRO_SURFACE_TYPE_IMAGE, NULL);
g_return_val_if_fail (0 <= x && x < cairo_image_surface_get_width (surface), NULL);
g_return_val_if_fail (0 <= y && y < cairo_image_surface_get_height (surface), NULL);
return GDK_DISPLAY_GET_CLASS (display)->get_cursor_for_surface (display,
surface, x, y);
}
/**
* gdk_cursor_get_display:
* @cursor: a #GdkCursor.

5
gdk/gdkcursor.h
View File

@ -228,6 +228,11 @@ GdkCursor* gdk_cursor_new_from_pixbuf (GdkDisplay *display,
GdkPixbuf *pixbuf,
gint x,
gint y);
GDK_AVAILABLE_IN_3_10
GdkCursor* gdk_cursor_new_from_surface (GdkDisplay *display,
cairo_surface_t *surface,
gdouble x,
gdouble y);
GDK_AVAILABLE_IN_ALL
GdkCursor* gdk_cursor_new_from_name (GdkDisplay *display,
const gchar *name);

8
gdk/gdkdisplayprivate.h
View File

@ -170,10 +170,10 @@ struct _GdkDisplayClass
GdkCursorType type);
GdkCursor * (*get_cursor_for_name) (GdkDisplay *display,
const gchar *name);
GdkCursor * (*get_cursor_for_pixbuf) (GdkDisplay *display,
GdkPixbuf *pixbuf,
gint x,
gint y);
GdkCursor * (*get_cursor_for_surface) (GdkDisplay *display,
cairo_surface_t *surface,
gdouble x,
gdouble y);
GList * (*list_devices) (GdkDisplay *display);
GdkAppLaunchContext * (*get_app_launch_context) (GdkDisplay *display);

144
gdk/wayland/gdkcursor-wayland.c
View File

@ -55,9 +55,9 @@ struct _GdkWaylandCursor
struct
{
int hotspot_x, hotspot_y;
int width, height;
int width, height, scale;
struct wl_buffer *buffer;
} pixbuf;
} surface;
struct wl_cursor *wl_cursor;
};
@ -168,8 +168,8 @@ gdk_wayland_cursor_finalize (GObject *object)
GdkWaylandCursor *cursor = GDK_WAYLAND_CURSOR (object);
g_free (cursor->name);
if (cursor->pixbuf.buffer)
wl_buffer_destroy (cursor->pixbuf.buffer);
if (cursor->surface.buffer)
wl_buffer_destroy (cursor->surface.buffer);
G_OBJECT_CLASS (_gdk_wayland_cursor_parent_class)->finalize (object);
}
@ -188,7 +188,8 @@ _gdk_wayland_cursor_get_buffer (GdkCursor *cursor,
int *hotspot_x,
int *hotspot_y,
int *w,
int *h)
int *h,
int *scale)
{
GdkWaylandCursor *wayland_cursor = GDK_WAYLAND_CURSOR (cursor);
@ -211,18 +212,20 @@ _gdk_wayland_cursor_get_buffer (GdkCursor *cursor,
*w = image->width;
*h = image->height;
*scale = 1;
return wl_cursor_image_get_buffer (image);
}
else /* From pixbuf */
else /* From surface */
{
*hotspot_x = wayland_cursor->pixbuf.hotspot_x;
*hotspot_y = wayland_cursor->pixbuf.hotspot_y;
*hotspot_x = wayland_cursor->surface.hotspot_x;
*hotspot_y = wayland_cursor->surface.hotspot_y;
*w = wayland_cursor->pixbuf.width;
*h = wayland_cursor->pixbuf.height;
*w = wayland_cursor->surface.width / wayland_cursor->surface.scale;
*h = wayland_cursor->surface.height / wayland_cursor->surface.scale;
*scale = wayland_cursor->surface.scale;
return wayland_cursor->pixbuf.buffer;
return wayland_cursor->surface.buffer;
}
}
@ -268,60 +271,6 @@ _gdk_wayland_cursor_init (GdkWaylandCursor *cursor)
{
}
/* Used to implement from_pixbuf below */
static void
set_pixbuf (gpointer argb_pixels, int width, int height, GdkPixbuf *pixbuf)
{
int stride, i, n_channels;
unsigned char *pixels, *end, *s, *d;
stride = gdk_pixbuf_get_rowstride(pixbuf);
pixels = gdk_pixbuf_get_pixels(pixbuf);
n_channels = gdk_pixbuf_get_n_channels(pixbuf);
#define MULT(_d,c,a,t) \
do { t = c * a + 0x7f; _d = ((t >> 8) + t) >> 8; } while (0)
if (n_channels == 4)
{
for (i = 0; i < height; i++)
{
s = pixels + i * stride;
end = s + width * 4;
d = argb_pixels + i * width * 4;
while (s < end)
{
unsigned int t;
MULT(d[0], s[2], s[3], t);
MULT(d[1], s[1], s[3], t);
MULT(d[2], s[0], s[3], t);
d[3] = s[3];
s += 4;
d += 4;
}
}
}
else if (n_channels == 3)
{
for (i = 0; i < height; i++)
{
s = pixels + i * stride;
end = s + width * 3;
d = argb_pixels + i * width * 4;
while (s < end)
{
d[0] = s[2];
d[1] = s[1];
d[2] = s[0];
d[3] = 0xff;
s += 3;
d += 4;
}
}
}
}
GdkCursor *
_gdk_wayland_display_get_cursor_for_type (GdkDisplay *display,
GdkCursorType cursor_type)
@ -382,10 +331,10 @@ _gdk_wayland_display_get_cursor_for_name (GdkDisplay *display,
}
GdkCursor *
_gdk_wayland_display_get_cursor_for_pixbuf (GdkDisplay *display,
GdkPixbuf *pixbuf,
gint x,
gint y)
_gdk_wayland_display_get_cursor_for_surface (GdkDisplay *display,
cairo_surface_t *surface,
gdouble x,
gdouble y)
{
GdkWaylandCursor *cursor;
GdkWaylandDisplay *wayland_display = GDK_WAYLAND_DISPLAY (display);
@ -393,11 +342,8 @@ _gdk_wayland_display_get_cursor_for_pixbuf (GdkDisplay *display,
size_t size;
gpointer data;
struct wl_shm_pool *pool;
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
g_return_val_if_fail (0 <= x && x < gdk_pixbuf_get_width (pixbuf), NULL);
g_return_val_if_fail (0 <= y && y < gdk_pixbuf_get_height (pixbuf), NULL);
cairo_surface_t *buffer_surface;
cairo_t *cr;
cursor = g_object_new (GDK_TYPE_WAYLAND_CURSOR,
"cursor-type", GDK_CURSOR_IS_PIXMAP,
@ -405,35 +351,55 @@ _gdk_wayland_display_get_cursor_for_pixbuf (GdkDisplay *display,
NULL);
cursor->name = NULL;
cursor->serial = theme_serial;
cursor->pixbuf.hotspot_x = x;
cursor->pixbuf.hotspot_y = y;
cursor->surface.hotspot_x = x;
cursor->surface.hotspot_y = y;
if (pixbuf)
cursor->surface.scale = 1;
if (surface)
{
cursor->pixbuf.width = gdk_pixbuf_get_width (pixbuf);
cursor->pixbuf.height = gdk_pixbuf_get_height (pixbuf);
#ifdef HAVE_CAIRO_SURFACE_SET_DEVICE_SCALE
{
double sx, sy;
cairo_surface_get_device_scale (surface, &sx, &sy);
cursor->surface.scale = (int)sx;
}
#endif
cursor->surface.width = cairo_image_surface_get_width (surface);
cursor->surface.height = cairo_image_surface_get_height (surface);
}
else
{
cursor->pixbuf.width = 1;
cursor->pixbuf.height = 1;
cursor->surface.width = 1;
cursor->surface.height = 1;
}
pool = _create_shm_pool (wayland_display->shm,
cursor->pixbuf.width,
cursor->pixbuf.height,
cursor->surface.width,
cursor->surface.height,
&size,
&data);
if (pixbuf)
set_pixbuf (data, cursor->pixbuf.width, cursor->pixbuf.height, pixbuf);
if (surface)
{
buffer_surface = cairo_image_surface_create_for_data (data,
CAIRO_FORMAT_ARGB32,
cursor->surface.width,
cursor->surface.height,
cursor->surface.width * 4);
cr = cairo_create (buffer_surface);
cairo_set_source_surface (cr, surface, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
cairo_surface_destroy (buffer_surface);
}
else
memset (data, 0, 4);
stride = cursor->pixbuf.width * 4;
cursor->pixbuf.buffer = wl_shm_pool_create_buffer (pool, 0,
cursor->pixbuf.width,
cursor->pixbuf.height,
stride = cursor->surface.width * 4;
cursor->surface.buffer = wl_shm_pool_create_buffer (pool, 0,
cursor->surface.width,
cursor->surface.height,
stride,
WL_SHM_FORMAT_ARGB8888);

5
gdk/wayland/gdkdevice-wayland.c
View File

@ -161,16 +161,17 @@ static gboolean
gdk_wayland_device_update_window_cursor (GdkWaylandDeviceData *wd)
{
struct wl_buffer *buffer;
int x, y, w, h;
int x, y, w, h, scale;
guint next_image_index, next_image_delay;
buffer = _gdk_wayland_cursor_get_buffer (wd->cursor, wd->cursor_image_index,
&x, &y, &w, &h);
&x, &y, &w, &h, &scale);
wl_pointer_set_cursor (wd->wl_pointer,
wd->enter_serial,
wd->pointer_surface,
x, y);
wl_surface_attach (wd->pointer_surface, buffer, 0, 0);
wl_surface_set_buffer_scale (wd->pointer_surface, scale);
wl_surface_damage (wd->pointer_surface, 0, 0, w, h);
wl_surface_commit (wd->pointer_surface);

2
gdk/wayland/gdkdisplay-wayland.c
View File

@ -587,7 +587,7 @@ gdk_wayland_display_class_init (GdkWaylandDisplayClass * class)
display_class->get_maximal_cursor_size = _gdk_wayland_display_get_maximal_cursor_size;
display_class->get_cursor_for_type = _gdk_wayland_display_get_cursor_for_type;
display_class->get_cursor_for_name = _gdk_wayland_display_get_cursor_for_name;
display_class->get_cursor_for_pixbuf = _gdk_wayland_display_get_cursor_for_pixbuf;
display_class->get_cursor_for_surface = _gdk_wayland_display_get_cursor_for_surface;
display_class->supports_cursor_alpha = _gdk_wayland_display_supports_cursor_alpha;
display_class->supports_cursor_color = _gdk_wayland_display_supports_cursor_color;
display_class->before_process_all_updates = gdk_wayland_display_before_process_all_updates;

11
gdk/wayland/gdkprivate-wayland.h
View File

@ -63,10 +63,10 @@ GdkCursor *_gdk_wayland_display_get_cursor_for_type (GdkDisplay *display,
GdkCursorType cursor_type);
GdkCursor *_gdk_wayland_display_get_cursor_for_name (GdkDisplay *display,
const gchar *name);
GdkCursor *_gdk_wayland_display_get_cursor_for_pixbuf (GdkDisplay *display,
GdkPixbuf *pixbuf,
gint x,
gint y);
GdkCursor *_gdk_wayland_display_get_cursor_for_surface (GdkDisplay *display,
cairo_surface_t *surface,
gdouble x,
gdouble y);
void _gdk_wayland_display_get_default_cursor_size (GdkDisplay *display,
guint *width,
guint *height);
@ -81,7 +81,8 @@ struct wl_buffer *_gdk_wayland_cursor_get_buffer (GdkCursor *cursor,
int *hotspot_x,
int *hotspot_y,
int *w,
int *h);
int *h,
int *scale);
guint _gdk_wayland_cursor_get_next_image_index (GdkCursor *cursor,
guint current_image_index,
guint *next_image_delay);

108
gdk/x11/gdkcursor-x11.c
View File

@ -43,6 +43,7 @@
#endif
#include <string.h>
#include <errno.h>
#include <math.h>
struct _GdkX11Cursor
{
@ -514,23 +515,46 @@ _gdk_x11_cursor_update_theme (GdkCursor *cursor)
#ifdef HAVE_XCURSOR
static XcursorImage*
create_cursor_image (GdkPixbuf *pixbuf,
gint x,
gint y)
static void
get_surface_size (cairo_surface_t *surface,
int *width,
int *height)
{
guint width, height;
double x_scale, y_scale;
x_scale = y_scale = 1;
#ifdef HAVE_CAIRO_SURFACE_SET_DEVICE_SCALE
cairo_surface_get_device_scale (surface, &x_scale, &y_scale);
#endif
/* Assume any set scaling is icon scale */
*width =
ceil (cairo_image_surface_get_width (surface) / x_scale);
*height =
ceil (cairo_image_surface_get_height (surface) / y_scale);
}
static XcursorImage*
create_cursor_image (cairo_surface_t *source_surface,
gint x,
gint y,
gint scale)
{
gint width, height;
XcursorImage *xcimage;
cairo_surface_t *surface;
cairo_t *cr;
width = gdk_pixbuf_get_width (pixbuf);
height = gdk_pixbuf_get_height (pixbuf);
get_surface_size (source_surface, &width, &height);
width *= scale;
height *= scale;
xcimage = XcursorImageCreate (width, height);
xcimage->xhot = x;
xcimage->yhot = y;
xcimage->xhot = x * scale;
xcimage->yhot = y * scale;
surface = cairo_image_surface_create_for_data ((guchar *) xcimage->pixels,
CAIRO_FORMAT_ARGB32,
@ -538,53 +562,30 @@ create_cursor_image (GdkPixbuf *pixbuf,
height,
width * 4);
#ifdef HAVE_CAIRO_SURFACE_SET_DEVICE_SCALE
cairo_surface_set_device_scale (surface, scale, scale);
#endif
cr = cairo_create (surface);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0);
cairo_set_source_surface (cr, source_surface, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
cairo_surface_destroy (surface);
return xcimage;
}
GdkCursor *
_gdk_x11_display_get_cursor_for_pixbuf (GdkDisplay *display,
GdkPixbuf *pixbuf,
gint x,
gint y)
_gdk_x11_display_get_cursor_for_surface (GdkDisplay *display,
cairo_surface_t *surface,
gdouble x,
gdouble y)
{
XcursorImage *xcimage;
Cursor xcursor;
GdkX11Cursor *private;
const char *option;
char *end;
gint64 value;
if (x == -1 && (option = gdk_pixbuf_get_option (pixbuf, "x_hot")))
{
errno = 0;
end = NULL;
value = g_ascii_strtoll (option, &end, 10);
if (errno == 0 &&
end != option &&
value >= 0 && value < G_MAXINT)
x = (gint) value;
}
if (y == -1 && (option = gdk_pixbuf_get_option (pixbuf, "y_hot")))
{
errno = 0;
end = NULL;
value = g_ascii_strtoll (option, &end, 10);
if (errno == 0 &&
end != option &&
value >= 0 && value < G_MAXINT)
y = (gint) value;
}
g_return_val_if_fail (0 <= x && x < gdk_pixbuf_get_width (pixbuf), NULL);
g_return_val_if_fail (0 <= y && y < gdk_pixbuf_get_height (pixbuf), NULL);
int target_scale;
if (gdk_display_is_closed (display))
{
@ -592,7 +593,9 @@ _gdk_x11_display_get_cursor_for_pixbuf (GdkDisplay *display,
}
else
{
xcimage = create_cursor_image (pixbuf, x, y);
target_scale =
gdk_screen_get_monitor_scale_factor (gdk_display_get_default_screen (display), 0);
xcimage = create_cursor_image (surface, x, y, target_scale);
xcursor = XcursorImageLoadCursor (GDK_DISPLAY_XDISPLAY (display), xcimage);
XcursorImageDestroy (xcimage);
}
@ -714,10 +717,10 @@ gdk_cursor_new_from_pixmap (GdkDisplay *display,
}
GdkCursor *
_gdk_x11_display_get_cursor_for_pixbuf (GdkDisplay *display,
GdkPixbuf *pixbuf,
gint x,
gint y)
_gdk_x11_display_get_cursor_for_surface (GdkDisplay *display,
cairo_surface_t *surface,
gdouble x,
gdouble y)
{
GdkCursor *cursor;
cairo_surface_t *pixmap, *mask;
@ -728,13 +731,18 @@ _gdk_x11_display_get_cursor_for_pixbuf (GdkDisplay *display,
GdkScreen *screen;
cairo_surface_t *image;
cairo_t *cr;
GdkPixbuf *pixbuf;
width = gdk_pixbuf_get_width (pixbuf);
height = gdk_pixbuf_get_height (pixbuf);
width = cairo_image_surface_get_width (surface);
height = cairo_image_surface_get_height (surface);
g_return_val_if_fail (0 <= x && x < width, NULL);
g_return_val_if_fail (0 <= y && y < height, NULL);
/* Note: This does not support scaled surfaced, if you need that you
want XCursor anyway */
pixbuf = gdk_pixbuf_get_from_surface (surface, 0, 0, width, height);
n_channels = gdk_pixbuf_get_n_channels (pixbuf);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
pixels = gdk_pixbuf_get_pixels (pixbuf);
@ -766,6 +774,8 @@ _gdk_x11_display_get_cursor_for_pixbuf (GdkDisplay *display,
}
}
g_object_unref (pixbuf);
screen = gdk_display_get_default_screen (display);
pixmap = _gdk_x11_window_create_bitmap_surface (gdk_screen_get_root_window (screen),

2
gdk/x11/gdkdisplay-x11.c
View File

@ -2825,7 +2825,7 @@ gdk_x11_display_class_init (GdkX11DisplayClass * class)
display_class->get_app_launch_context = _gdk_x11_display_get_app_launch_context;
display_class->get_cursor_for_type = _gdk_x11_display_get_cursor_for_type;
display_class->get_cursor_for_name = _gdk_x11_display_get_cursor_for_name;
display_class->get_cursor_for_pixbuf = _gdk_x11_display_get_cursor_for_pixbuf;
display_class->get_cursor_for_surface = _gdk_x11_display_get_cursor_for_surface;
display_class->get_default_cursor_size = _gdk_x11_display_get_default_cursor_size;
display_class->get_maximal_cursor_size = _gdk_x11_display_get_maximal_cursor_size;
display_class->supports_cursor_alpha = _gdk_x11_display_supports_cursor_alpha;

8
gdk/x11/gdkprivate-x11.h
View File

@ -259,10 +259,10 @@ GdkCursor *_gdk_x11_display_get_cursor_for_type (GdkDisplay *display,
GdkCursorType type);
GdkCursor *_gdk_x11_display_get_cursor_for_name (GdkDisplay *display,
const gchar *name);
GdkCursor *_gdk_x11_display_get_cursor_for_pixbuf (GdkDisplay *display,
GdkPixbuf *pixbuf,
gint x,
gint y);
GdkCursor *_gdk_x11_display_get_cursor_for_surface (GdkDisplay *display,
cairo_surface_t *surface,
gdouble x,
gdouble y);
gboolean _gdk_x11_display_supports_cursor_alpha (GdkDisplay *display);
gboolean _gdk_x11_display_supports_cursor_color (GdkDisplay *display);
void _gdk_x11_display_get_default_cursor_size (GdkDisplay *display,