mutter/src/backends/meta-cursor-sprite-xcursor.c

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/*
* Copyright 2013, 2018 Red Hat, Inc.
*
* 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, see <http://www.gnu.org/licenses/>.
*
*/
#include "config.h"
#include "backends/meta-cursor-sprite-xcursor.h"
#include "backends/meta-cursor.h"
#include "backends/meta-cursor-renderer.h"
#include "clutter/clutter.h"
#include "cogl/cogl.h"
#include "meta/prefs.h"
#include "meta/util.h"
struct _MetaCursorSpriteXcursor
{
MetaCursorSprite parent;
MetaCursor cursor;
int current_frame;
XcursorImages *xcursor_images;
int theme_scale;
gboolean theme_dirty;
gboolean invalidated;
};
G_DEFINE_TYPE (MetaCursorSpriteXcursor, meta_cursor_sprite_xcursor,
META_TYPE_CURSOR_SPRITE)
static const char *
translate_meta_cursor (MetaCursor cursor)
{
switch (cursor)
{
case META_CURSOR_DEFAULT:
return "default";
case META_CURSOR_NORTH_RESIZE:
return "n-resize";
case META_CURSOR_SOUTH_RESIZE:
return "s-resize";
case META_CURSOR_WEST_RESIZE:
return "w-resize";
case META_CURSOR_EAST_RESIZE:
return "e-resize";
case META_CURSOR_SE_RESIZE:
return "se-resize";
case META_CURSOR_SW_RESIZE:
return "sw-resize";
case META_CURSOR_NE_RESIZE:
return "ne-resize";
case META_CURSOR_NW_RESIZE:
return "nw-resize";
case META_CURSOR_MOVE_OR_RESIZE_WINDOW:
return "move";
case META_CURSOR_BUSY:
return "wait";
case META_CURSOR_DND_IN_DRAG:
return "default";
case META_CURSOR_DND_MOVE:
return "default";
case META_CURSOR_DND_COPY:
return "copy";
case META_CURSOR_DND_UNSUPPORTED_TARGET:
return "no-drop";
case META_CURSOR_POINTING_HAND:
return "pointer";
case META_CURSOR_CROSSHAIR:
return "crosshair";
case META_CURSOR_IBEAM:
return "text";
case META_CURSOR_BLANK:
case META_CURSOR_NONE:
case META_CURSOR_LAST:
break;
}
g_assert_not_reached ();
return NULL;
}
static Cursor
create_blank_cursor (Display *xdisplay)
{
Pixmap pixmap;
XColor color;
Cursor cursor;
XGCValues gc_values;
GC gc;
pixmap = XCreatePixmap (xdisplay, DefaultRootWindow (xdisplay), 1, 1, 1);
gc_values.foreground = BlackPixel (xdisplay, DefaultScreen (xdisplay));
gc = XCreateGC (xdisplay, pixmap, GCForeground, &gc_values);
XFillRectangle (xdisplay, pixmap, gc, 0, 0, 1, 1);
color.pixel = 0;
color.red = color.blue = color.green = 0;
cursor = XCreatePixmapCursor (xdisplay, pixmap, pixmap, &color, &color, 1, 1);
XFreeGC (xdisplay, gc);
XFreePixmap (xdisplay, pixmap);
return cursor;
}
static XcursorImages *
create_blank_cursor_images (void)
{
XcursorImages *images;
images = XcursorImagesCreate (1);
images->images[0] = XcursorImageCreate (1, 1);
images->images[0]->xhot = 0;
images->images[0]->yhot = 0;
memset (images->images[0]->pixels, 0, sizeof(int32_t));
return images;
}
MetaCursor
meta_cursor_sprite_xcursor_get_cursor (MetaCursorSpriteXcursor *sprite_xcursor)
{
return sprite_xcursor->cursor;
}
Cursor
meta_create_x_cursor (Display *xdisplay,
MetaCursor cursor)
{
if (cursor == META_CURSOR_BLANK)
return create_blank_cursor (xdisplay);
return XcursorLibraryLoadCursor (xdisplay, translate_meta_cursor (cursor));
}
static XcursorImages *
load_cursor_on_client (MetaCursor cursor, int scale)
{
XcursorImages *xcursor_images;
int fallback_size, i;
/* Set a 'default' fallback */
MetaCursor cursors[] = { cursor, META_CURSOR_DEFAULT };
if (cursor == META_CURSOR_BLANK)
return create_blank_cursor_images ();
for (i = 0; i < G_N_ELEMENTS (cursors); i++)
{
xcursor_images =
XcursorLibraryLoadImages (translate_meta_cursor (cursors[i]),
meta_prefs_get_cursor_theme (),
meta_prefs_get_cursor_size () * scale);
if (xcursor_images)
return xcursor_images;
}
g_warning_once ("No cursor theme available, please install a cursor theme");
fallback_size = 24 * scale;
xcursor_images = XcursorImagesCreate (1);
xcursor_images->images[0] = XcursorImageCreate (fallback_size, fallback_size);
xcursor_images->images[0]->xhot = 0;
xcursor_images->images[0]->yhot = 0;
memset (xcursor_images->images[0]->pixels, 0xc0,
fallback_size * fallback_size * sizeof (int32_t));
return xcursor_images;
}
static void
load_from_current_xcursor_image (MetaCursorSpriteXcursor *sprite_xcursor)
{
MetaCursorSprite *sprite = META_CURSOR_SPRITE (sprite_xcursor);
XcursorImage *xc_image;
int width, height, rowstride;
CoglPixelFormat cogl_format;
ClutterBackend *clutter_backend;
CoglContext *cogl_context;
CoglTexture *texture;
GError *error = NULL;
int hotspot_x, hotspot_y;
g_assert (!meta_cursor_sprite_get_cogl_texture (sprite));
xc_image = meta_cursor_sprite_xcursor_get_current_image (sprite_xcursor);
width = (int) xc_image->width;
height = (int) xc_image->height;
rowstride = width * 4;
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
cogl_format = COGL_PIXEL_FORMAT_BGRA_8888;
#else
cogl_format = COGL_PIXEL_FORMAT_ARGB_8888;
#endif
clutter_backend = clutter_get_default_backend ();
cogl_context = clutter_backend_get_cogl_context (clutter_backend);
texture = cogl_texture_2d_new_from_data (cogl_context,
width, height,
cogl_format,
rowstride,
(uint8_t *) xc_image->pixels,
&error);
if (!texture)
{
g_warning ("Failed to allocate cursor texture: %s", error->message);
g_error_free (error);
}
if (meta_is_wayland_compositor ())
{
hotspot_x = ((int) (xc_image->xhot / sprite_xcursor->theme_scale) *
sprite_xcursor->theme_scale);
hotspot_y = ((int) (xc_image->yhot / sprite_xcursor->theme_scale) *
sprite_xcursor->theme_scale);
}
else
{
hotspot_x = xc_image->xhot;
hotspot_y = xc_image->yhot;
}
meta_cursor_sprite_set_texture (sprite,
texture,
hotspot_x, hotspot_y);
g_clear_object (&texture);
}
void
meta_cursor_sprite_xcursor_set_theme_scale (MetaCursorSpriteXcursor *sprite_xcursor,
int theme_scale)
{
if (sprite_xcursor->theme_scale != theme_scale)
sprite_xcursor->theme_dirty = TRUE;
sprite_xcursor->theme_scale = theme_scale;
}
static gboolean
meta_cursor_sprite_xcursor_is_animated (MetaCursorSprite *sprite)
{
MetaCursorSpriteXcursor *sprite_xcursor = META_CURSOR_SPRITE_XCURSOR (sprite);
return (sprite_xcursor->xcursor_images &&
sprite_xcursor->xcursor_images->nimage > 1);
}
XcursorImage *
meta_cursor_sprite_xcursor_get_current_image (MetaCursorSpriteXcursor *sprite_xcursor)
{
return sprite_xcursor->xcursor_images->images[sprite_xcursor->current_frame];
}
static void
meta_cursor_sprite_xcursor_tick_frame (MetaCursorSprite *sprite)
{
MetaCursorSpriteXcursor *sprite_xcursor = META_CURSOR_SPRITE_XCURSOR (sprite);
if (!meta_cursor_sprite_is_animated (sprite))
return;
sprite_xcursor->current_frame++;
if (sprite_xcursor->current_frame >= sprite_xcursor->xcursor_images->nimage)
sprite_xcursor->current_frame = 0;
meta_cursor_sprite_clear_texture (sprite);
load_from_current_xcursor_image (sprite_xcursor);
}
static unsigned int
meta_cursor_sprite_xcursor_get_current_frame_time (MetaCursorSprite *sprite)
{
MetaCursorSpriteXcursor *sprite_xcursor = META_CURSOR_SPRITE_XCURSOR (sprite);
XcursorImages *xcursor_images;
g_return_val_if_fail (meta_cursor_sprite_is_animated (sprite), 0);
xcursor_images = sprite_xcursor->xcursor_images;
return xcursor_images->images[sprite_xcursor->current_frame]->delay;
}
static void
load_cursor_from_theme (MetaCursorSprite *sprite)
{
MetaCursorSpriteXcursor *sprite_xcursor = META_CURSOR_SPRITE_XCURSOR (sprite);
g_assert (sprite_xcursor->cursor != META_CURSOR_NONE);
sprite_xcursor->theme_dirty = FALSE;
/* We might be reloading with a different scale. If so clear the old data. */
if (sprite_xcursor->xcursor_images)
{
meta_cursor_sprite_clear_texture (sprite);
XcursorImagesDestroy (sprite_xcursor->xcursor_images);
}
sprite_xcursor->current_frame = 0;
sprite_xcursor->xcursor_images =
load_cursor_on_client (sprite_xcursor->cursor,
sprite_xcursor->theme_scale);
load_from_current_xcursor_image (sprite_xcursor);
}
static gboolean
meta_cursor_sprite_xcursor_realize_texture (MetaCursorSprite *sprite)
{
MetaCursorSpriteXcursor *sprite_xcursor = META_CURSOR_SPRITE_XCURSOR (sprite);
gboolean retval = sprite_xcursor->invalidated;
if (sprite_xcursor->theme_dirty)
{
load_cursor_from_theme (sprite);
retval = TRUE;
}
sprite_xcursor->invalidated = FALSE;
return retval;
}
static void
meta_cursor_sprite_xcursor_invalidate (MetaCursorSprite *sprite)
{
MetaCursorSpriteXcursor *sprite_xcursor = META_CURSOR_SPRITE_XCURSOR (sprite);
sprite_xcursor->invalidated = TRUE;
}
MetaCursorSpriteXcursor *
meta_cursor_sprite_xcursor_new (MetaCursor cursor,
MetaCursorTracker *cursor_tracker)
{
MetaCursorSpriteXcursor *sprite_xcursor;
sprite_xcursor = g_object_new (META_TYPE_CURSOR_SPRITE_XCURSOR,
"cursor-tracker", cursor_tracker,
NULL);
sprite_xcursor->cursor = cursor;
return sprite_xcursor;
}
static void
meta_cursor_sprite_xcursor_finalize (GObject *object)
{
MetaCursorSpriteXcursor *sprite_xcursor = META_CURSOR_SPRITE_XCURSOR (object);
g_clear_pointer (&sprite_xcursor->xcursor_images,
XcursorImagesDestroy);
G_OBJECT_CLASS (meta_cursor_sprite_xcursor_parent_class)->finalize (object);
}
static void
meta_cursor_sprite_xcursor_init (MetaCursorSpriteXcursor *sprite_xcursor)
{
sprite_xcursor->theme_scale = 1;
sprite_xcursor->theme_dirty = TRUE;
}
static void
meta_cursor_sprite_xcursor_class_init (MetaCursorSpriteXcursorClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
MetaCursorSpriteClass *cursor_sprite_class = META_CURSOR_SPRITE_CLASS (klass);
object_class->finalize = meta_cursor_sprite_xcursor_finalize;
cursor_sprite_class->realize_texture =
meta_cursor_sprite_xcursor_realize_texture;
cursor_sprite_class->invalidate =
meta_cursor_sprite_xcursor_invalidate;
cursor_sprite_class->is_animated = meta_cursor_sprite_xcursor_is_animated;
cursor_sprite_class->tick_frame = meta_cursor_sprite_xcursor_tick_frame;
cursor_sprite_class->get_current_frame_time =
meta_cursor_sprite_xcursor_get_current_frame_time;
}