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gtk/gdk/wayland/gdkcursor-wayland.c
Matthias Clasen 94c5d691df wayland: Formatting fixes
2015-02-28 00:02:30 -05:00

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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#define GDK_PIXBUF_ENABLE_BACKEND
#include <string.h>
#include "gdkprivate-wayland.h"
#include "gdkcursorprivate.h"
#include "gdkdisplay-wayland.h"
#include "gdkwayland.h"
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <wayland-cursor.h>
#define GDK_TYPE_WAYLAND_CURSOR (_gdk_wayland_cursor_get_type ())
#define GDK_WAYLAND_CURSOR(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), GDK_TYPE_WAYLAND_CURSOR, GdkWaylandCursor))
#define GDK_WAYLAND_CURSOR_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GDK_TYPE_WAYLAND_CURSOR, GdkWaylandCursorClass))
#define GDK_IS_WAYLAND_CURSOR(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), GDK_TYPE_WAYLAND_CURSOR))
#define GDK_IS_WAYLAND_CURSOR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GDK_TYPE_WAYLAND_CURSOR))
#define GDK_WAYLAND_CURSOR_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GDK_TYPE_WAYLAND_CURSOR, GdkWaylandCursorClass))
typedef struct _GdkWaylandCursor GdkWaylandCursor;
typedef struct _GdkWaylandCursorClass GdkWaylandCursorClass;
struct _GdkWaylandCursor
{
GdkCursor cursor;
gchar *name;
struct
{
int hotspot_x, hotspot_y;
int width, height, scale;
cairo_surface_t *cairo_surface;
} surface;
struct wl_cursor *wl_cursor;
};
struct _GdkWaylandCursorClass
{
GdkCursorClass cursor_class;
};
GType _gdk_wayland_cursor_get_type (void);
G_DEFINE_TYPE (GdkWaylandCursor, _gdk_wayland_cursor, GDK_TYPE_CURSOR)
void
_gdk_wayland_display_init_cursors (GdkWaylandDisplay *display)
{
display->cursor_cache = g_hash_table_new_full (g_str_hash, g_str_equal, NULL, g_object_unref);
}
void
_gdk_wayland_display_finalize_cursors (GdkWaylandDisplay *display)
{
g_hash_table_destroy (display->cursor_cache);
}
static gboolean
set_cursor_from_theme (GdkWaylandCursor *cursor,
struct wl_cursor_theme *theme)
{
struct wl_cursor *c;
c = wl_cursor_theme_get_cursor (theme, cursor->name);
if (!c)
{
g_warning (G_STRLOC ": Unable to load %s from the cursor theme", cursor->name);
/* return the left_ptr cursor as a fallback */
c = wl_cursor_theme_get_cursor (theme, "left_ptr");
if (!c)
return FALSE;
}
cursor->wl_cursor = c;
return TRUE;
}
void
_gdk_wayland_display_update_cursors (GdkWaylandDisplay *display,
struct wl_cursor_theme *theme)
{
GHashTableIter iter;
const char *name;
GdkWaylandCursor *cursor;
g_hash_table_iter_init (&iter, display->cursor_cache);
while (g_hash_table_iter_next (&iter, (gpointer *) &name, (gpointer *) &cursor))
set_cursor_from_theme (cursor, theme);
}
static void
gdk_wayland_cursor_finalize (GObject *object)
{
GdkWaylandCursor *cursor = GDK_WAYLAND_CURSOR (object);
g_free (cursor->name);
if (cursor->surface.cairo_surface)
cairo_surface_destroy (cursor->surface.cairo_surface);
G_OBJECT_CLASS (_gdk_wayland_cursor_parent_class)->finalize (object);
}
static cairo_surface_t *
gdk_wayland_cursor_get_surface (GdkCursor *cursor,
gdouble *x_hot,
gdouble *y_hot)
{
return NULL;
}
struct wl_buffer *
_gdk_wayland_cursor_get_buffer (GdkCursor *cursor,
guint image_index,
int *hotspot_x,
int *hotspot_y,
int *w,
int *h,
int *scale)
{
GdkWaylandCursor *wayland_cursor = GDK_WAYLAND_CURSOR (cursor);
if (wayland_cursor->wl_cursor)
{
struct wl_cursor_image *image;
if (image_index >= wayland_cursor->wl_cursor->image_count)
{
g_warning (G_STRLOC " out of bounds cursor image [%d / %d]",
image_index,
wayland_cursor->wl_cursor->image_count - 1);
image_index = 0;
}
image = wayland_cursor->wl_cursor->images[image_index];
*hotspot_x = image->hotspot_x;
*hotspot_y = image->hotspot_y;
*w = image->width;
*h = image->height;
*scale = 1;
return wl_cursor_image_get_buffer (image);
}
else /* From surface */
{
*hotspot_x = wayland_cursor->surface.hotspot_x;
*hotspot_y = wayland_cursor->surface.hotspot_y;
*w = wayland_cursor->surface.width / wayland_cursor->surface.scale;
*h = wayland_cursor->surface.height / wayland_cursor->surface.scale;
*scale = wayland_cursor->surface.scale;
cairo_surface_reference (wayland_cursor->surface.cairo_surface);
if (wayland_cursor->surface.cairo_surface)
return _gdk_wayland_shm_surface_get_wl_buffer (wayland_cursor->surface.cairo_surface);
else
return NULL;
}
}
guint
_gdk_wayland_cursor_get_next_image_index (GdkCursor *cursor,
guint current_image_index,
guint *next_image_delay)
{
struct wl_cursor *wl_cursor = GDK_WAYLAND_CURSOR (cursor)->wl_cursor;
if (wl_cursor && wl_cursor->image_count > 1)
{
if (current_image_index >= wl_cursor->image_count)
{
g_warning (G_STRLOC " out of bounds cursor image [%d / %d]",
current_image_index, wl_cursor->image_count - 1);
current_image_index = 0;
}
/* Return the time to next image */
if (next_image_delay)
*next_image_delay = wl_cursor->images[current_image_index]->delay;
return (current_image_index + 1) % wl_cursor->image_count;
}
else
return current_image_index;
}
static void
_gdk_wayland_cursor_class_init (GdkWaylandCursorClass *wayland_cursor_class)
{
GdkCursorClass *cursor_class = GDK_CURSOR_CLASS (wayland_cursor_class);
GObjectClass *object_class = G_OBJECT_CLASS (wayland_cursor_class);
object_class->finalize = gdk_wayland_cursor_finalize;
cursor_class->get_surface = gdk_wayland_cursor_get_surface;
}
static void
_gdk_wayland_cursor_init (GdkWaylandCursor *cursor)
{
}
GdkCursor *
_gdk_wayland_display_get_cursor_for_type (GdkDisplay *display,
GdkCursorType cursor_type)
{
GEnumClass *enum_class;
GEnumValue *enum_value;
gchar *cursor_name;
GdkCursor *result;
enum_class = g_type_class_ref (GDK_TYPE_CURSOR_TYPE);
enum_value = g_enum_get_value (enum_class, cursor_type);
cursor_name = g_strdup (enum_value->value_nick);
g_strdelimit (cursor_name, "-", '_');
g_type_class_unref (enum_class);
result = _gdk_wayland_display_get_cursor_for_name (display, cursor_name);
g_free (cursor_name);
return result;
}
GdkCursor *
_gdk_wayland_display_get_cursor_for_name (GdkDisplay *display,
const gchar *name)
{
GdkWaylandCursor *private;
GdkWaylandDisplay *wayland_display = GDK_WAYLAND_DISPLAY (display);
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
private = g_hash_table_lookup (wayland_display->cursor_cache, name);
if (private)
return GDK_CURSOR (g_object_ref (private));
private = g_object_new (GDK_TYPE_WAYLAND_CURSOR,
"cursor-type", GDK_CURSOR_IS_PIXMAP,
"display", display,
NULL);
private->name = g_strdup (name);
private->surface.scale = 1;
/* Blank cursor case */
if (!name || g_str_equal (name, "blank_cursor"))
return GDK_CURSOR (private);
if (!set_cursor_from_theme (private, wayland_display->cursor_theme))
return GDK_CURSOR (private);
/* Insert into cache. */
g_hash_table_insert (wayland_display->cursor_cache, private->name, g_object_ref (private));
return GDK_CURSOR (private);
}
GdkCursor *
_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);
cairo_t *cr;
cursor = g_object_new (GDK_TYPE_WAYLAND_CURSOR,
"cursor-type", GDK_CURSOR_IS_PIXMAP,
"display", wayland_display,
NULL);
cursor->name = NULL;
cursor->surface.hotspot_x = x;
cursor->surface.hotspot_y = y;
cursor->surface.scale = 1;
if (surface)
{
double sx, sy;
cairo_surface_get_device_scale (surface, &sx, &sy);
cursor->surface.scale = (int)sx;
cursor->surface.width = cairo_image_surface_get_width (surface);
cursor->surface.height = cairo_image_surface_get_height (surface);
}
else
{
cursor->surface.width = 1;
cursor->surface.height = 1;
}
cursor->surface.cairo_surface = _gdk_wayland_display_create_shm_surface (wayland_display,
cursor->surface.width,
cursor->surface.height,
cursor->surface.scale);
if (surface)
{
cr = cairo_create (cursor->surface.cairo_surface);
cairo_set_source_surface (cr, surface, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
}
return GDK_CURSOR (cursor);
}
void
_gdk_wayland_display_get_default_cursor_size (GdkDisplay *display,
guint *width,
guint *height)
{
*width = 32;
*height = 32;
}
void
_gdk_wayland_display_get_maximal_cursor_size (GdkDisplay *display,
guint *width,
guint *height)
{
*width = 256;
*height = 256;
}
gboolean
_gdk_wayland_display_supports_cursor_alpha (GdkDisplay *display)
{
return TRUE;
}
gboolean
_gdk_wayland_display_supports_cursor_color (GdkDisplay *display)
{
return TRUE;
}
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