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d603164ec2
On Wayland it is a protocol violation to upload buffers with dimensions that are not an integer multiple of the buffer scale. Until recently, Mutter did not enforce this. When it started doing so, some users started seeing crashes in GTK apps because the cursor theme ended up with e.g. a 15x16 pixel image at scale of 2. Add a small sanity check for this case.
327 lines
10 KiB
C
327 lines
10 KiB
C
/* GDK - The GIMP Drawing Kit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#define GDK_PIXBUF_ENABLE_BACKEND
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#include <string.h>
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#include "gdkprivate-wayland.h"
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#include "gdkcursorprivate.h"
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#include "gdkdisplay-wayland.h"
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#include "gdkwayland.h"
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include "cursor/wayland-cursor.h"
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static void
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gdk_wayland_cursor_remove_from_cache (gpointer data, GObject *cursor)
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{
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GdkWaylandDisplay *display = data;
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g_hash_table_remove (display->cursor_surface_cache, cursor);
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}
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void
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_gdk_wayland_display_init_cursors (GdkWaylandDisplay *display)
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{
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display->cursor_surface_cache = g_hash_table_new_full (gdk_cursor_hash, gdk_cursor_equal, NULL, (GDestroyNotify) cairo_surface_destroy);
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}
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void
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_gdk_wayland_display_finalize_cursors (GdkWaylandDisplay *display)
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{
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GHashTableIter iter;
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gpointer cursor;
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g_hash_table_iter_init (&iter, display->cursor_surface_cache);
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while (g_hash_table_iter_next (&iter, &cursor, NULL))
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g_object_weak_unref (G_OBJECT (cursor), gdk_wayland_cursor_remove_from_cache, display);
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g_hash_table_destroy (display->cursor_surface_cache);
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}
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static const struct {
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const char *css_name, *traditional_name;
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} name_map[] = {
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{ "default", "left_ptr" },
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{ "help", "question_arrow" },
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{ "context-menu", "left_ptr" },
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{ "pointer", "hand" },
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{ "progress", "left_ptr_watch" },
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{ "wait", "watch" },
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{ "cell", "crosshair" },
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{ "crosshair", "cross" },
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{ "text", "xterm" },
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{ "vertical-text","xterm" },
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{ "alias", "dnd-link" },
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{ "copy", "dnd-copy" },
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{ "move", "dnd-move" },
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{ "no-drop", "dnd-none" },
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{ "dnd-ask", "dnd-copy" }, /* not CSS, but we want to guarantee it anyway */
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{ "not-allowed", "crossed_circle" },
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{ "grab", "hand2" },
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{ "grabbing", "hand2" },
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{ "all-scroll", "left_ptr" },
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{ "col-resize", "h_double_arrow" },
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{ "row-resize", "v_double_arrow" },
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{ "n-resize", "top_side" },
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{ "e-resize", "right_side" },
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{ "s-resize", "bottom_side" },
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{ "w-resize", "left_side" },
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{ "ne-resize", "top_right_corner" },
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{ "nw-resize", "top_left_corner" },
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{ "se-resize", "bottom_right_corner" },
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{ "sw-resize", "bottom_left_corner" },
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{ "ew-resize", "h_double_arrow" },
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{ "ns-resize", "v_double_arrow" },
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{ "nesw-resize", "fd_double_arrow" },
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{ "nwse-resize", "bd_double_arrow" },
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{ "zoom-in", "left_ptr" },
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{ "zoom-out", "left_ptr" }
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};
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static const char *
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name_fallback (const char *name)
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{
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int i;
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for (i = 0; i < G_N_ELEMENTS (name_map); i++)
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{
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if (g_str_equal (name_map[i].css_name, name))
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return name_map[i].traditional_name;
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}
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return NULL;
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}
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static struct wl_cursor *
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gdk_wayland_cursor_load_for_name (GdkWaylandDisplay *display_wayland,
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struct wl_cursor_theme *theme,
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int scale,
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const char *name)
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{
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struct wl_cursor *c;
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c = wl_cursor_theme_get_cursor (theme, name, scale);
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if (!c)
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{
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const char *fallback;
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fallback = name_fallback (name);
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if (fallback)
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{
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c = wl_cursor_theme_get_cursor (theme, fallback, scale);
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}
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}
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return c;
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}
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static void
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buffer_release_callback (void *_data,
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struct wl_buffer *wl_buffer)
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{
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cairo_surface_t *cairo_surface = _data;
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cairo_surface_destroy (cairo_surface);
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}
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static const struct wl_buffer_listener buffer_listener = {
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buffer_release_callback
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};
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struct wl_buffer *
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_gdk_wayland_cursor_get_buffer (GdkWaylandDisplay *display,
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GdkCursor *cursor,
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guint desired_scale,
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guint image_index,
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int *hotspot_x,
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int *hotspot_y,
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int *width,
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int *height,
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int *scale)
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{
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GdkTexture *texture;
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if (gdk_cursor_get_name (cursor))
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{
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struct wl_cursor *c;
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if (g_str_equal (gdk_cursor_get_name (cursor), "none"))
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goto none;
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c = gdk_wayland_cursor_load_for_name (display,
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_gdk_wayland_display_get_cursor_theme (display),
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desired_scale,
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gdk_cursor_get_name (cursor));
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if (c)
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{
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struct wl_cursor_image *image;
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int cursor_scale;
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if (image_index >= c->image_count)
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{
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g_warning (G_STRLOC " out of bounds cursor image [%d / %d]",
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image_index,
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c->image_count - 1);
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image_index = 0;
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}
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image = c->images[image_index];
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cursor_scale = desired_scale;
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if ((image->width % cursor_scale != 0) ||
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(image->height % cursor_scale != 0))
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{
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g_warning (G_STRLOC " cursor image size (%dx%d) not an integer"
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"multiple of scale (%d)", image->width, image->height,
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cursor_scale);
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cursor_scale = 1;
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}
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*hotspot_x = image->hotspot_x / cursor_scale;
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*hotspot_y = image->hotspot_y / cursor_scale;
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*width = image->width / cursor_scale;
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*height = image->height / cursor_scale;
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*scale = cursor_scale;
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return wl_cursor_image_get_buffer (image);
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}
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}
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else
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{
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cairo_surface_t *surface;
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struct wl_buffer *buffer;
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texture = gdk_cursor_get_texture (cursor);
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from_texture:
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surface = g_hash_table_lookup (display->cursor_surface_cache, cursor);
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if (surface == NULL)
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{
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surface = _gdk_wayland_display_create_shm_surface (display,
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gdk_texture_get_width (texture),
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gdk_texture_get_height (texture),
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1);
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gdk_texture_download (texture,
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cairo_image_surface_get_data (surface),
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cairo_image_surface_get_stride (surface));
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cairo_surface_mark_dirty (surface);
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g_object_weak_ref (G_OBJECT (cursor), gdk_wayland_cursor_remove_from_cache, display);
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g_hash_table_insert (display->cursor_surface_cache, cursor, surface);
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}
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*hotspot_x = gdk_cursor_get_hotspot_x (cursor);
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*hotspot_y = gdk_cursor_get_hotspot_y (cursor);
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*width = gdk_texture_get_width (texture);
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*height = gdk_texture_get_height (texture);
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*scale = 1;
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cairo_surface_reference (surface);
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buffer = _gdk_wayland_shm_surface_get_wl_buffer (surface);
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wl_buffer_add_listener (buffer, &buffer_listener, surface);
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return buffer;
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}
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if (gdk_cursor_get_fallback (cursor))
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return _gdk_wayland_cursor_get_buffer (display,
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gdk_cursor_get_fallback (cursor),
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desired_scale,
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image_index,
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hotspot_x, hotspot_y,
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width, height,
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scale);
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else
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{
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texture = gdk_texture_new_from_resource ("/org/gtk/libgdk/cursor/default");
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goto from_texture;
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}
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none:
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*hotspot_x = 0;
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*hotspot_y = 0;
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*width = 0;
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*height = 0;
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*scale = 1;
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return NULL;
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}
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guint
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_gdk_wayland_cursor_get_next_image_index (GdkWaylandDisplay *display,
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GdkCursor *cursor,
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guint scale,
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guint current_image_index,
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guint *next_image_delay)
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{
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struct wl_cursor *c;
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if (!gdk_cursor_get_name (cursor) ||
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g_str_equal (gdk_cursor_get_name (cursor), "none"))
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{
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*next_image_delay = 0;
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return current_image_index;
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}
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c = gdk_wayland_cursor_load_for_name (display,
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_gdk_wayland_display_get_cursor_theme (display),
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scale,
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gdk_cursor_get_name (cursor));
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if (c)
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{
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if (current_image_index >= c->image_count)
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{
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g_warning (G_STRLOC " out of bounds cursor image [%d / %d]",
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current_image_index, c->image_count - 1);
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current_image_index = 0;
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}
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if (c->image_count == 1)
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{
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*next_image_delay = 0;
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return current_image_index;
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}
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else
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{
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*next_image_delay = c->images[current_image_index]->delay;
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return (current_image_index + 1) % c->image_count;
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}
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}
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if (gdk_cursor_get_fallback (cursor))
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return _gdk_wayland_cursor_get_next_image_index (display,
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gdk_cursor_get_fallback (cursor),
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scale,
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current_image_index,
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next_image_delay);
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*next_image_delay = 0;
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return current_image_index;
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}
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