/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- gnomebg.c: Object for the desktop background. Copyright (C) 2000 Eazel, Inc. Copyright (C) 2007-2008 Red Hat, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU Library 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. Derived from eel-background.c and eel-gdk-pixbuf-extensions.c by Darin Adler and Ramiro Estrugo Author: Soren Sandmann */ #include #include #include #include #include #include #include #include #include #include #include #define GNOME_DESKTOP_USE_UNSTABLE_API #include "gnome-bg.h" #include "gnome-bg-slide-show.h" #include "gnome-bg-crossfade.h" #define BG_KEY_PRIMARY_COLOR "primary-color" #define BG_KEY_SECONDARY_COLOR "secondary-color" #define BG_KEY_COLOR_TYPE "color-shading-type" #define BG_KEY_PICTURE_PLACEMENT "picture-options" #define BG_KEY_PICTURE_OPACITY "picture-opacity" #define BG_KEY_PICTURE_URI "picture-uri" /* We keep the large pixbufs around if the next update in the slideshow is less than 60 seconds away */ #define KEEP_EXPENSIVE_CACHE_SECS 60 /* This is the size of the GdkRGB dither matrix, in order to avoid * bad dithering when tiling the gradient */ #define GRADIENT_PIXMAP_TILE_SIZE 128 #define THUMBNAIL_SIZE 256 typedef struct FileCacheEntry FileCacheEntry; #define CACHE_SIZE 4 /* * Implementation of the GnomeBG class */ struct _GnomeBG { GObject parent_instance; char * filename; GDesktopBackgroundStyle placement; GDesktopBackgroundShading color_type; GdkColor primary; GdkColor secondary; GFileMonitor * file_monitor; guint changed_id; guint transitioned_id; guint blow_caches_id; /* Cached information, only access through cache accessor functions */ GnomeBGSlideShow * slideshow; time_t file_mtime; GdkPixbuf * pixbuf_cache; int timeout_id; GList * file_cache; }; struct _GnomeBGClass { GObjectClass parent_class; }; enum { CHANGED, TRANSITIONED, N_SIGNALS }; static const cairo_user_data_key_t average_color_key; static guint signals[N_SIGNALS] = { 0 }; G_DEFINE_TYPE (GnomeBG, gnome_bg, G_TYPE_OBJECT) static cairo_surface_t *make_root_pixmap (GdkScreen *screen, gint width, gint height); /* Pixbuf utils */ static void pixbuf_average_value (GdkPixbuf *pixbuf, GdkRGBA *result); static GdkPixbuf *pixbuf_scale_to_fit (GdkPixbuf *src, int max_width, int max_height); static GdkPixbuf *pixbuf_scale_to_min (GdkPixbuf *src, int min_width, int min_height); static void pixbuf_draw_gradient (GdkPixbuf *pixbuf, gboolean horizontal, GdkColor *c1, GdkColor *c2, GdkRectangle *rect); static void pixbuf_tile (GdkPixbuf *src, GdkPixbuf *dest); static void pixbuf_blend (GdkPixbuf *src, GdkPixbuf *dest, int src_x, int src_y, int width, int height, int dest_x, int dest_y, double alpha); /* Thumbnail utilities */ static GdkPixbuf *create_thumbnail_for_filename (GnomeDesktopThumbnailFactory *factory, const char *filename); static gboolean get_thumb_annotations (GdkPixbuf *thumb, int *orig_width, int *orig_height); /* Cache */ static GdkPixbuf *get_pixbuf_for_size (GnomeBG *bg, gint num_monitor, int width, int height); static void clear_cache (GnomeBG *bg); static gboolean is_different (GnomeBG *bg, const char *filename); static time_t get_mtime (const char *filename); static GdkPixbuf *create_img_thumbnail (GnomeBG *bg, GnomeDesktopThumbnailFactory *factory, GdkScreen *screen, int dest_width, int dest_height, int frame_num); static GnomeBGSlideShow * get_as_slideshow (GnomeBG *bg, const char *filename); static GnomeBGSlideShow *read_slideshow_file (const char *filename, GError **err); static void color_from_string (const char *string, GdkColor *colorp) { /* If all else fails use black */ gdk_color_parse ("black", colorp); if (!string) return; gdk_color_parse (string, colorp); } static char * color_to_string (const GdkColor *color) { return g_strdup_printf ("#%02x%02x%02x", color->red >> 8, color->green >> 8, color->blue >> 8); } static gboolean do_changed (GnomeBG *bg) { gboolean ignore_pending_change; bg->changed_id = 0; ignore_pending_change = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (bg), "ignore-pending-change")); if (!ignore_pending_change) { g_signal_emit (G_OBJECT (bg), signals[CHANGED], 0); } return FALSE; } static void queue_changed (GnomeBG *bg) { if (bg->changed_id > 0) { g_source_remove (bg->changed_id); } /* We unset this here to allow apps to set it if they don't want to get the change event. This is used by nautilus when it gets the pixmap from the bg (due to a reason other than the changed event). Because if there is no other change after this time the pending changed event will just uselessly cause us to recreate the pixmap. */ g_object_set_data (G_OBJECT (bg), "ignore-pending-change", GINT_TO_POINTER (FALSE)); bg->changed_id = g_timeout_add_full (G_PRIORITY_LOW, 100, (GSourceFunc)do_changed, bg, NULL); } static gboolean do_transitioned (GnomeBG *bg) { bg->transitioned_id = 0; if (bg->pixbuf_cache) { g_object_unref (bg->pixbuf_cache); bg->pixbuf_cache = NULL; } g_signal_emit (G_OBJECT (bg), signals[TRANSITIONED], 0); return FALSE; } static void queue_transitioned (GnomeBG *bg) { if (bg->transitioned_id > 0) { g_source_remove (bg->transitioned_id); } bg->transitioned_id = g_timeout_add_full (G_PRIORITY_LOW, 100, (GSourceFunc)do_transitioned, bg, NULL); } static gboolean bg_gsettings_mapping (GVariant *value, gpointer *result, gpointer user_data) { const gchar *bg_key_value; char *filename = NULL; /* The final fallback if nothing matches is with a NULL value. */ if (value == NULL) { *result = NULL; return TRUE; } bg_key_value = g_variant_get_string (value, NULL); if (bg_key_value && *bg_key_value != '\0') { filename = g_filename_from_uri (bg_key_value, NULL, NULL); if (filename != NULL && g_file_test (filename, G_FILE_TEST_EXISTS) == FALSE) { g_free (filename); return FALSE; } if (filename != NULL) { *result = filename; return TRUE; } } return FALSE; } void gnome_bg_load_from_preferences (GnomeBG *bg, GSettings *settings) { char *tmp; char *filename; GDesktopBackgroundShading ctype; GdkColor c1, c2; GDesktopBackgroundStyle placement; g_return_if_fail (GNOME_IS_BG (bg)); g_return_if_fail (G_IS_SETTINGS (settings)); /* Filename */ filename = g_settings_get_mapped (settings, BG_KEY_PICTURE_URI, bg_gsettings_mapping, NULL); /* Colors */ tmp = g_settings_get_string (settings, BG_KEY_PRIMARY_COLOR); color_from_string (tmp, &c1); g_free (tmp); tmp = g_settings_get_string (settings, BG_KEY_SECONDARY_COLOR); color_from_string (tmp, &c2); g_free (tmp); /* Color type */ ctype = g_settings_get_enum (settings, BG_KEY_COLOR_TYPE); /* Placement */ placement = g_settings_get_enum (settings, BG_KEY_PICTURE_PLACEMENT); gnome_bg_set_color (bg, ctype, &c1, &c2); gnome_bg_set_placement (bg, placement); gnome_bg_set_filename (bg, filename); g_free (filename); } void gnome_bg_save_to_preferences (GnomeBG *bg, GSettings *settings) { gchar *primary; gchar *secondary; gchar *uri; g_return_if_fail (GNOME_IS_BG (bg)); g_return_if_fail (G_IS_SETTINGS (settings)); primary = color_to_string (&bg->primary); secondary = color_to_string (&bg->secondary); g_settings_delay (settings); uri = NULL; if (bg->filename != NULL) uri = g_filename_to_uri (bg->filename, NULL, NULL); if (uri == NULL) uri = g_strdup (""); g_settings_set_string (settings, BG_KEY_PICTURE_URI, uri); g_settings_set_string (settings, BG_KEY_PRIMARY_COLOR, primary); g_settings_set_string (settings, BG_KEY_SECONDARY_COLOR, secondary); g_settings_set_enum (settings, BG_KEY_COLOR_TYPE, bg->color_type); g_settings_set_enum (settings, BG_KEY_PICTURE_PLACEMENT, bg->placement); /* Apply changes atomically. */ g_settings_apply (settings); g_free (primary); g_free (secondary); g_free (uri); } static void gnome_bg_init (GnomeBG *bg) { } static void gnome_bg_dispose (GObject *object) { GnomeBG *bg = GNOME_BG (object); if (bg->file_monitor) { g_object_unref (bg->file_monitor); bg->file_monitor = NULL; } clear_cache (bg); G_OBJECT_CLASS (gnome_bg_parent_class)->dispose (object); } static void gnome_bg_finalize (GObject *object) { GnomeBG *bg = GNOME_BG (object); if (bg->changed_id != 0) { g_source_remove (bg->changed_id); bg->changed_id = 0; } if (bg->transitioned_id != 0) { g_source_remove (bg->transitioned_id); bg->transitioned_id = 0; } if (bg->blow_caches_id != 0) { g_source_remove (bg->blow_caches_id); bg->blow_caches_id = 0; } g_free (bg->filename); bg->filename = NULL; G_OBJECT_CLASS (gnome_bg_parent_class)->finalize (object); } static void gnome_bg_class_init (GnomeBGClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); object_class->dispose = gnome_bg_dispose; object_class->finalize = gnome_bg_finalize; signals[CHANGED] = g_signal_new ("changed", G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_LAST, 0, NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); signals[TRANSITIONED] = g_signal_new ("transitioned", G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_LAST, 0, NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); } GnomeBG * gnome_bg_new (void) { return g_object_new (GNOME_TYPE_BG, NULL); } void gnome_bg_set_color (GnomeBG *bg, GDesktopBackgroundShading type, GdkColor *primary, GdkColor *secondary) { g_return_if_fail (bg != NULL); g_return_if_fail (primary != NULL); if (bg->color_type != type || !gdk_color_equal (&bg->primary, primary) || (secondary && !gdk_color_equal (&bg->secondary, secondary))) { bg->color_type = type; bg->primary = *primary; if (secondary) { bg->secondary = *secondary; } queue_changed (bg); } } void gnome_bg_set_placement (GnomeBG *bg, GDesktopBackgroundStyle placement) { g_return_if_fail (bg != NULL); if (bg->placement != placement) { bg->placement = placement; queue_changed (bg); } } GDesktopBackgroundStyle gnome_bg_get_placement (GnomeBG *bg) { g_return_val_if_fail (bg != NULL, -1); return bg->placement; } void gnome_bg_get_color (GnomeBG *bg, GDesktopBackgroundShading *type, GdkColor *primary, GdkColor *secondary) { g_return_if_fail (bg != NULL); if (type) *type = bg->color_type; if (primary) *primary = bg->primary; if (secondary) *secondary = bg->secondary; } const gchar * gnome_bg_get_filename (GnomeBG *bg) { g_return_val_if_fail (bg != NULL, NULL); return bg->filename; } static inline gchar * get_wallpaper_cache_dir (void) { return g_build_filename (g_get_user_cache_dir(), "wallpaper", NULL); } static inline gchar * get_wallpaper_cache_prefix_name (gint num_monitor, GDesktopBackgroundStyle placement, gint width, gint height) { return g_strdup_printf ("%i_%i_%i_%i", num_monitor, (gint) placement, width, height); } static char * get_wallpaper_cache_filename (const char *filename, gint num_monitor, GDesktopBackgroundStyle placement, gint width, gint height) { gchar *cache_filename; gchar *cache_prefix_name; gchar *md5_filename; gchar *cache_basename; gchar *cache_dir; md5_filename = g_compute_checksum_for_data (G_CHECKSUM_MD5, (const guchar *) filename, strlen (filename)); cache_prefix_name = get_wallpaper_cache_prefix_name (num_monitor, placement, width, height); cache_basename = g_strdup_printf ("%s_%s", cache_prefix_name, md5_filename); cache_dir = get_wallpaper_cache_dir (); cache_filename = g_build_filename (cache_dir, cache_basename, NULL); g_free (cache_prefix_name); g_free (md5_filename); g_free (cache_basename); g_free (cache_dir); return cache_filename; } static void cleanup_cache_for_monitor (gchar *cache_dir, gint num_monitor) { GDir *g_cache_dir; gchar *monitor_prefix; const gchar *file; g_cache_dir = g_dir_open (cache_dir, 0, NULL); monitor_prefix = g_strdup_printf ("%i_", num_monitor); file = g_dir_read_name (g_cache_dir); while (file != NULL) { gchar *path; path = g_build_filename (cache_dir, file, NULL); /* purge files with same monitor id */ if (g_str_has_prefix (file, monitor_prefix) && g_file_test (path, G_FILE_TEST_IS_REGULAR)) g_unlink (path); g_free (path); file = g_dir_read_name (g_cache_dir); } g_free (monitor_prefix); g_dir_close (g_cache_dir); } static gboolean cache_file_is_valid (const char *filename, const char *cache_filename) { time_t mtime; time_t cache_mtime; if (!g_file_test (cache_filename, G_FILE_TEST_IS_REGULAR)) return FALSE; mtime = get_mtime (filename); cache_mtime = get_mtime (cache_filename); return (mtime < cache_mtime); } static void refresh_cache_file (GnomeBG *bg, GdkPixbuf *new_pixbuf, gint num_monitor, gint width, gint height) { gchar *cache_filename; gchar *cache_dir; GdkPixbufFormat *format; gchar *format_name; if ((num_monitor == -1) || (width <= 300) || (height <= 300)) return; cache_filename = get_wallpaper_cache_filename (bg->filename, num_monitor, bg->placement, width, height); cache_dir = get_wallpaper_cache_dir (); /* Only refresh scaled file on disk if useful (and don't cache slideshow) */ if (!cache_file_is_valid (bg->filename, cache_filename)) { format = gdk_pixbuf_get_file_info (bg->filename, NULL, NULL); if (format != NULL) { if (!g_file_test (cache_dir, G_FILE_TEST_IS_DIR)) { g_mkdir_with_parents (cache_dir, 0700); } else { cleanup_cache_for_monitor (cache_dir, num_monitor); } format_name = gdk_pixbuf_format_get_name (format); if (strcmp (format_name, "jpeg") == 0) gdk_pixbuf_save (new_pixbuf, cache_filename, format_name, NULL, "quality", "100", NULL); else gdk_pixbuf_save (new_pixbuf, cache_filename, format_name, NULL, NULL); g_free (format_name); } } g_free (cache_filename); g_free (cache_dir); } static void file_changed (GFileMonitor *file_monitor, GFile *child, GFile *other_file, GFileMonitorEvent event_type, gpointer user_data) { GnomeBG *bg = GNOME_BG (user_data); clear_cache (bg); queue_changed (bg); } void gnome_bg_set_filename (GnomeBG *bg, const char *filename) { g_return_if_fail (bg != NULL); if (is_different (bg, filename)) { g_free (bg->filename); bg->filename = g_strdup (filename); bg->file_mtime = get_mtime (bg->filename); if (bg->file_monitor) { g_object_unref (bg->file_monitor); bg->file_monitor = NULL; } if (bg->filename) { GFile *f = g_file_new_for_path (bg->filename); bg->file_monitor = g_file_monitor_file (f, 0, NULL, NULL); g_signal_connect (bg->file_monitor, "changed", G_CALLBACK (file_changed), bg); g_object_unref (f); } clear_cache (bg); queue_changed (bg); } } static void draw_color_area (GnomeBG *bg, GdkPixbuf *dest, GdkRectangle *rect) { guint32 pixel; GdkRectangle extent; extent.x = 0; extent.y = 0; extent.width = gdk_pixbuf_get_width (dest); extent.height = gdk_pixbuf_get_height (dest); gdk_rectangle_intersect (rect, &extent, rect); switch (bg->color_type) { case G_DESKTOP_BACKGROUND_SHADING_SOLID: /* not really a big deal to ignore the area of interest */ pixel = ((bg->primary.red >> 8) << 24) | ((bg->primary.green >> 8) << 16) | ((bg->primary.blue >> 8) << 8) | (0xff); gdk_pixbuf_fill (dest, pixel); break; case G_DESKTOP_BACKGROUND_SHADING_HORIZONTAL: pixbuf_draw_gradient (dest, TRUE, &(bg->primary), &(bg->secondary), rect); break; case G_DESKTOP_BACKGROUND_SHADING_VERTICAL: pixbuf_draw_gradient (dest, FALSE, &(bg->primary), &(bg->secondary), rect); break; default: break; } } static void draw_color (GnomeBG *bg, GdkPixbuf *dest) { GdkRectangle rect; rect.x = 0; rect.y = 0; rect.width = gdk_pixbuf_get_width (dest); rect.height = gdk_pixbuf_get_height (dest); draw_color_area (bg, dest, &rect); } static void draw_color_each_monitor (GnomeBG *bg, GdkPixbuf *dest, GdkScreen *screen) { GdkRectangle rect; gint num_monitors; int monitor; num_monitors = gdk_screen_get_n_monitors (screen); for (monitor = 0; monitor < num_monitors; monitor++) { gdk_screen_get_monitor_geometry (screen, monitor, &rect); draw_color_area (bg, dest, &rect); } } static GdkPixbuf * pixbuf_clip_to_fit (GdkPixbuf *src, int max_width, int max_height) { int src_width, src_height; int w, h; int src_x, src_y; GdkPixbuf *pixbuf; src_width = gdk_pixbuf_get_width (src); src_height = gdk_pixbuf_get_height (src); if (src_width < max_width && src_height < max_height) return g_object_ref (src); w = MIN(src_width, max_width); h = MIN(src_height, max_height); pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, gdk_pixbuf_get_has_alpha (src), 8, w, h); src_x = (src_width - w) / 2; src_y = (src_height - h) / 2; gdk_pixbuf_copy_area (src, src_x, src_y, w, h, pixbuf, 0, 0); return pixbuf; } static GdkPixbuf * get_scaled_pixbuf (GDesktopBackgroundStyle placement, GdkPixbuf *pixbuf, int width, int height, int *x, int *y, int *w, int *h) { GdkPixbuf *new; #if 0 g_print ("original_width: %d %d\n", gdk_pixbuf_get_width (pixbuf), gdk_pixbuf_get_height (pixbuf)); #endif switch (placement) { case G_DESKTOP_BACKGROUND_STYLE_SPANNED: new = pixbuf_scale_to_fit (pixbuf, width, height); break; case G_DESKTOP_BACKGROUND_STYLE_ZOOM: new = pixbuf_scale_to_min (pixbuf, width, height); break; case G_DESKTOP_BACKGROUND_STYLE_STRETCHED: new = gdk_pixbuf_scale_simple (pixbuf, width, height, GDK_INTERP_BILINEAR); break; case G_DESKTOP_BACKGROUND_STYLE_SCALED: new = pixbuf_scale_to_fit (pixbuf, width, height); break; case G_DESKTOP_BACKGROUND_STYLE_CENTERED: case G_DESKTOP_BACKGROUND_STYLE_WALLPAPER: default: new = pixbuf_clip_to_fit (pixbuf, width, height); break; } *w = gdk_pixbuf_get_width (new); *h = gdk_pixbuf_get_height (new); *x = (width - *w) / 2; *y = (height - *h) / 2; return new; } static void draw_image_area (GnomeBG *bg, gint num_monitor, GdkPixbuf *pixbuf, GdkPixbuf *dest, GdkRectangle *area) { int dest_width = area->width; int dest_height = area->height; int x, y, w, h; GdkPixbuf *scaled; if (!pixbuf) return; scaled = get_scaled_pixbuf (bg->placement, pixbuf, dest_width, dest_height, &x, &y, &w, &h); switch (bg->placement) { case G_DESKTOP_BACKGROUND_STYLE_WALLPAPER: pixbuf_tile (scaled, dest); break; case G_DESKTOP_BACKGROUND_STYLE_ZOOM: case G_DESKTOP_BACKGROUND_STYLE_CENTERED: case G_DESKTOP_BACKGROUND_STYLE_STRETCHED: case G_DESKTOP_BACKGROUND_STYLE_SCALED: pixbuf_blend (scaled, dest, 0, 0, w, h, x + area->x, y + area->y, 1.0); break; case G_DESKTOP_BACKGROUND_STYLE_SPANNED: pixbuf_blend (scaled, dest, 0, 0, w, h, x, y, 1.0); break; default: g_assert_not_reached (); break; } refresh_cache_file (bg, scaled, num_monitor, dest_width, dest_height); g_object_unref (scaled); } static void draw_image_for_thumb (GnomeBG *bg, GdkPixbuf *pixbuf, GdkPixbuf *dest) { GdkRectangle rect; rect.x = 0; rect.y = 0; rect.width = gdk_pixbuf_get_width (dest); rect.height = gdk_pixbuf_get_height (dest); draw_image_area (bg, -1, pixbuf, dest, &rect); } static void draw_once (GnomeBG *bg, GdkPixbuf *dest) { GdkRectangle rect; GdkPixbuf *pixbuf; gint num_monitor; /* we just draw on the whole screen */ num_monitor = 0; rect.x = 0; rect.y = 0; rect.width = gdk_pixbuf_get_width (dest); rect.height = gdk_pixbuf_get_height (dest); pixbuf = get_pixbuf_for_size (bg, num_monitor, rect.width, rect.height); if (pixbuf) { draw_image_area (bg, num_monitor, pixbuf, dest, &rect); g_object_unref (pixbuf); } } static void draw_each_monitor (GnomeBG *bg, GdkPixbuf *dest, GdkScreen *screen) { GdkRectangle rect; gint num_monitors; int monitor; num_monitors = gdk_screen_get_n_monitors (screen); for (monitor = 0; monitor < num_monitors; monitor++) { GdkPixbuf *pixbuf; gdk_screen_get_monitor_geometry (screen, monitor, &rect); pixbuf = get_pixbuf_for_size (bg, monitor, rect.width, rect.height); if (pixbuf) { draw_image_area (bg, monitor, pixbuf, dest, &rect); g_object_unref (pixbuf); } } } void gnome_bg_draw (GnomeBG *bg, GdkPixbuf *dest, GdkScreen *screen, gboolean is_root) { if (!bg) return; if (is_root && (bg->placement != G_DESKTOP_BACKGROUND_STYLE_SPANNED)) { draw_color_each_monitor (bg, dest, screen); if (bg->placement != G_DESKTOP_BACKGROUND_STYLE_NONE) { draw_each_monitor (bg, dest, screen); } } else { draw_color (bg, dest); if (bg->placement != G_DESKTOP_BACKGROUND_STYLE_NONE) { draw_once (bg, dest); } } } gboolean gnome_bg_has_multiple_sizes (GnomeBG *bg) { GnomeBGSlideShow *show; gboolean ret; g_return_val_if_fail (bg != NULL, FALSE); ret = FALSE; show = get_as_slideshow (bg, bg->filename); if (show) { ret = gnome_bg_slide_show_get_has_multiple_sizes (show); g_object_unref (show); } return ret; } static void gnome_bg_get_pixmap_size (GnomeBG *bg, int width, int height, int *pixmap_width, int *pixmap_height) { int dummy; if (!pixmap_width) pixmap_width = &dummy; if (!pixmap_height) pixmap_height = &dummy; *pixmap_width = width; *pixmap_height = height; if (!bg->filename) { switch (bg->color_type) { case G_DESKTOP_BACKGROUND_SHADING_SOLID: *pixmap_width = 1; *pixmap_height = 1; break; case G_DESKTOP_BACKGROUND_SHADING_HORIZONTAL: case G_DESKTOP_BACKGROUND_SHADING_VERTICAL: break; } return; } } /** * gnome_bg_create_surface: * @bg: GnomeBG * @window: * @width: * @height: * @root: * * Create a surface that can be set as background for @window. If @is_root is * TRUE, the surface created will be created by a temporary X server connection * so that if someone calls XKillClient on it, it won't affect the application * who created it. * * Returns: %NULL on error (e.g. out of X connections) **/ cairo_surface_t * gnome_bg_create_surface (GnomeBG *bg, GdkWindow *window, int width, int height, gboolean root) { int pm_width, pm_height; cairo_surface_t *surface; GdkRGBA average; cairo_t *cr; g_return_val_if_fail (bg != NULL, NULL); g_return_val_if_fail (window != NULL, NULL); if (bg->pixbuf_cache && gdk_pixbuf_get_width (bg->pixbuf_cache) != width && gdk_pixbuf_get_height (bg->pixbuf_cache) != height) { g_object_unref (bg->pixbuf_cache); bg->pixbuf_cache = NULL; } /* has the side effect of loading and caching pixbuf only when in tile mode */ gnome_bg_get_pixmap_size (bg, width, height, &pm_width, &pm_height); if (root) { surface = make_root_pixmap (gdk_window_get_screen (window), pm_width, pm_height); } else { surface = gdk_window_create_similar_surface (window, CAIRO_CONTENT_COLOR, pm_width, pm_height); } if (surface == NULL) return NULL; cr = cairo_create (surface); if (!bg->filename && bg->color_type == G_DESKTOP_BACKGROUND_SHADING_SOLID) { gdk_cairo_set_source_color (cr, &(bg->primary)); average.red = bg->primary.red / 65535.0; average.green = bg->primary.green / 65535.0; average.blue = bg->primary.blue / 65535.0; average.alpha = 1.0; } else { GdkPixbuf *pixbuf; pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, width, height); gnome_bg_draw (bg, pixbuf, gdk_window_get_screen (window), root); gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0); pixbuf_average_value (pixbuf, &average); g_object_unref (pixbuf); } cairo_paint (cr); cairo_destroy (cr); cairo_surface_set_user_data (surface, &average_color_key, gdk_rgba_copy (&average), (cairo_destroy_func_t) gdk_rgba_free); return surface; } /* determine if a background is darker or lighter than average, to help * clients know what colors to draw on top with */ gboolean gnome_bg_is_dark (GnomeBG *bg, int width, int height) { GdkColor color; int intensity; GdkPixbuf *pixbuf; g_return_val_if_fail (bg != NULL, FALSE); if (bg->color_type == G_DESKTOP_BACKGROUND_SHADING_SOLID) { color = bg->primary; } else { color.red = (bg->primary.red + bg->secondary.red) / 2; color.green = (bg->primary.green + bg->secondary.green) / 2; color.blue = (bg->primary.blue + bg->secondary.blue) / 2; } pixbuf = get_pixbuf_for_size (bg, -1, width, height); if (pixbuf) { GdkRGBA argb; guchar a, r, g, b; pixbuf_average_value (pixbuf, &argb); a = argb.alpha * 0xff; r = argb.red * 0xff; g = argb.green * 0xff; b = argb.blue * 0xff; color.red = (color.red * (0xFF - a) + r * 0x101 * a) / 0xFF; color.green = (color.green * (0xFF - a) + g * 0x101 * a) / 0xFF; color.blue = (color.blue * (0xFF - a) + b * 0x101 * a) / 0xFF; g_object_unref (pixbuf); } intensity = (color.red * 77 + color.green * 150 + color.blue * 28) >> 16; return intensity < 160; /* biased slightly to be dark */ } /* * Create a persistent pixmap. We create a separate display * and set the closedown mode on it to RetainPermanent. */ static cairo_surface_t * make_root_pixmap (GdkScreen *screen, gint width, gint height) { Display *display; const char *display_name; Pixmap result; cairo_surface_t *surface; int screen_num; int depth; screen_num = gdk_screen_get_number (screen); gdk_flush (); display_name = gdk_display_get_name (gdk_screen_get_display (screen)); display = XOpenDisplay (display_name); if (display == NULL) { g_warning ("Unable to open display '%s' when setting " "background pixmap\n", (display_name) ? display_name : "NULL"); return NULL; } /* Desktop background pixmap should be created from * dummy X client since most applications will try to * kill it with XKillClient later when changing pixmap */ XSetCloseDownMode (display, RetainPermanent); depth = DefaultDepth (display, screen_num); result = XCreatePixmap (display, RootWindow (display, screen_num), width, height, depth); XCloseDisplay (display); surface = cairo_xlib_surface_create (GDK_SCREEN_XDISPLAY (screen), result, GDK_VISUAL_XVISUAL (gdk_screen_get_system_visual (screen)), width, height); return surface; } static gboolean get_original_size (const char *filename, int *orig_width, int *orig_height) { gboolean result; if (gdk_pixbuf_get_file_info (filename, orig_width, orig_height)) result = TRUE; else result = FALSE; return result; } static const char * get_filename_for_size (GnomeBG *bg, gint best_width, gint best_height) { GnomeBGSlideShow *show; const char *file = NULL; if (!bg->filename) return NULL; show = get_as_slideshow (bg, bg->filename); if (!show) { return bg->filename; } gnome_bg_slide_show_get_current_slide (show, best_width, best_height, NULL, NULL, NULL, &file, NULL); g_object_unref (show); return file; } gboolean gnome_bg_get_image_size (GnomeBG *bg, GnomeDesktopThumbnailFactory *factory, int best_width, int best_height, int *width, int *height) { GdkPixbuf *thumb; gboolean result = FALSE; const gchar *filename; g_return_val_if_fail (bg != NULL, FALSE); g_return_val_if_fail (factory != NULL, FALSE); if (!bg->filename) return FALSE; filename = get_filename_for_size (bg, best_width, best_height); thumb = create_thumbnail_for_filename (factory, filename); if (thumb) { if (get_thumb_annotations (thumb, width, height)) result = TRUE; g_object_unref (thumb); } if (!result) { if (get_original_size (filename, width, height)) result = TRUE; } return result; } static double fit_factor (int from_width, int from_height, int to_width, int to_height) { return MIN (to_width / (double) from_width, to_height / (double) from_height); } /** * gnome_bg_create_thumbnail: * * Returns: (transfer full): a #GdkPixbuf showing the background as a thumbnail */ GdkPixbuf * gnome_bg_create_thumbnail (GnomeBG *bg, GnomeDesktopThumbnailFactory *factory, GdkScreen *screen, int dest_width, int dest_height) { GdkPixbuf *result; GdkPixbuf *thumb; g_return_val_if_fail (bg != NULL, NULL); result = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, dest_width, dest_height); draw_color (bg, result); if (bg->placement != G_DESKTOP_BACKGROUND_STYLE_NONE) { thumb = create_img_thumbnail (bg, factory, screen, dest_width, dest_height, -1); if (thumb) { draw_image_for_thumb (bg, thumb, result); g_object_unref (thumb); } } return result; } /** * gnome_bg_get_surface_from_root: * @screen: a #GdkScreen * * This function queries the _XROOTPMAP_ID property from * the root window associated with @screen to determine * the current root window background pixmap and returns * a copy of it. If the _XROOTPMAP_ID is not set, then * a black surface is returned. * * Return value: a #cairo_surface_t if successful or %NULL **/ cairo_surface_t * gnome_bg_get_surface_from_root (GdkScreen *screen) { int result; gint format; gulong nitems; gulong bytes_after; guchar *data; Atom type; Display *display; int screen_num; cairo_surface_t *surface; cairo_surface_t *source_pixmap; int width, height; cairo_t *cr; display = GDK_DISPLAY_XDISPLAY (gdk_screen_get_display (screen)); screen_num = gdk_screen_get_number (screen); result = XGetWindowProperty (display, RootWindow (display, screen_num), gdk_x11_get_xatom_by_name ("_XROOTPMAP_ID"), 0L, 1L, False, XA_PIXMAP, &type, &format, &nitems, &bytes_after, &data); surface = NULL; source_pixmap = NULL; if (result != Success || type != XA_PIXMAP || format != 32 || nitems != 1) { XFree (data); data = NULL; } if (data != NULL) { Pixmap xpixmap = *(Pixmap *) data; Window root_return; int x_ret, y_ret; unsigned int w_ret, h_ret, bw_ret, depth_ret; gdk_error_trap_push (); if (XGetGeometry (GDK_SCREEN_XDISPLAY (screen), xpixmap, &root_return, &x_ret, &y_ret, &w_ret, &h_ret, &bw_ret, &depth_ret)) { source_pixmap = cairo_xlib_surface_create (GDK_SCREEN_XDISPLAY (screen), xpixmap, GDK_VISUAL_XVISUAL (gdk_screen_get_system_visual (screen)), w_ret, h_ret); } gdk_error_trap_pop_ignored (); } width = gdk_screen_get_width (screen); height = gdk_screen_get_height (screen); if (source_pixmap) { surface = cairo_surface_create_similar (source_pixmap, CAIRO_CONTENT_COLOR, width, height); cr = cairo_create (surface); cairo_set_source_surface (cr, source_pixmap, 0, 0); cairo_paint (cr); if (cairo_status (cr) != CAIRO_STATUS_SUCCESS) { cairo_surface_destroy (surface); surface = NULL; } cairo_destroy (cr); } if (surface == NULL) { surface = gdk_window_create_similar_surface (gdk_screen_get_root_window (screen), CAIRO_CONTENT_COLOR, width, height); } if (source_pixmap != NULL) cairo_surface_destroy (source_pixmap); if (data != NULL) XFree (data); return surface; } static void gnome_bg_set_root_pixmap_id (GdkScreen *screen, cairo_surface_t *surface) { int result; gint format; gulong nitems; gulong bytes_after; guchar *data_esetroot; Pixmap pixmap_id; Atom type; Display *display; int screen_num; GdkRGBA *average; screen_num = gdk_screen_get_number (screen); data_esetroot = NULL; display = GDK_DISPLAY_XDISPLAY (gdk_screen_get_display (screen)); result = XGetWindowProperty (display, RootWindow (display, screen_num), gdk_x11_get_xatom_by_name ("ESETROOT_PMAP_ID"), 0L, 1L, False, XA_PIXMAP, &type, &format, &nitems, &bytes_after, &data_esetroot); if (data_esetroot != NULL) { if (result == Success && type == XA_PIXMAP && format == 32 && nitems == 1) { gdk_error_trap_push (); XKillClient (display, *(Pixmap *)data_esetroot); gdk_error_trap_pop_ignored (); } XFree (data_esetroot); } pixmap_id = cairo_xlib_surface_get_drawable (surface); XChangeProperty (display, RootWindow (display, screen_num), gdk_x11_get_xatom_by_name ("ESETROOT_PMAP_ID"), XA_PIXMAP, 32, PropModeReplace, (guchar *) &pixmap_id, 1); XChangeProperty (display, RootWindow (display, screen_num), gdk_x11_get_xatom_by_name ("_XROOTPMAP_ID"), XA_PIXMAP, 32, PropModeReplace, (guchar *) &pixmap_id, 1); average = cairo_surface_get_user_data (surface, &average_color_key); if (average != NULL) { gchar *string; string = gdk_rgba_to_string (average); /* X encodes string lists as one big string with a nul * terminator after each item in the list. That's why * the strlen has to be given; scanning for nul would * only find the first item. * * For now, we only want to set a single string. * Fortunately, since this is C, it comes with its own * nul and we can just give strlen + 1 for the size of * our "list". */ XChangeProperty (display, RootWindow (display, screen_num), gdk_x11_get_xatom_by_name ("_GNOME_BACKGROUND_REPRESENTATIVE_COLORS"), XA_STRING, 8, PropModeReplace, (guchar *) string, strlen (string) + 1); g_free (string); } else { /* Could happen if we didn't create the surface... */ XDeleteProperty (display, RootWindow (display, screen_num), gdk_x11_get_xatom_by_name ("_GNOME_BACKGROUND_REPRESENTATIVE_COLORS")); } } /** * gnome_bg_set_surface_as_root: * @screen: the #GdkScreen to change root background on * @surface: the #cairo_surface_t to set root background from. * Must be an xlib surface backing a pixmap. * * Set the root pixmap, and properties pointing to it. We * do this atomically with a server grab to make sure that * we won't leak the pixmap if somebody else it setting * it at the same time. (This assumes that they follow the * same conventions we do). @surface should come from a call * to gnome_bg_create_surface(). **/ void gnome_bg_set_surface_as_root (GdkScreen *screen, cairo_surface_t *surface) { Display *display; int screen_num; g_return_if_fail (screen != NULL); g_return_if_fail (surface != NULL); g_return_if_fail (cairo_surface_get_type (surface) == CAIRO_SURFACE_TYPE_XLIB); screen_num = gdk_screen_get_number (screen); display = GDK_DISPLAY_XDISPLAY (gdk_screen_get_display (screen)); gdk_x11_display_grab (gdk_screen_get_display (screen)); gnome_bg_set_root_pixmap_id (screen, surface); XSetWindowBackgroundPixmap (display, RootWindow (display, screen_num), cairo_xlib_surface_get_drawable (surface)); XClearWindow (display, RootWindow (display, screen_num)); gdk_display_flush (gdk_screen_get_display (screen)); gdk_x11_display_ungrab (gdk_screen_get_display (screen)); } /** * gnome_bg_set_surface_as_root_with_crossfade: * @screen: the #GdkScreen to change root background on * @surface: the cairo xlib surface to set root background from * * Set the root pixmap, and properties pointing to it. * This function differs from gnome_bg_set_surface_as_root() * in that it adds a subtle crossfade animation from the * current root pixmap to the new one. * * Return value: (transfer full): a #GnomeBGCrossfade object **/ GnomeBGCrossfade * gnome_bg_set_surface_as_root_with_crossfade (GdkScreen *screen, cairo_surface_t *surface) { GdkDisplay *display; GdkWindow *root_window; cairo_surface_t *old_surface; int width, height; GnomeBGCrossfade *fade; g_return_val_if_fail (screen != NULL, NULL); g_return_val_if_fail (surface != NULL, NULL); root_window = gdk_screen_get_root_window (screen); width = gdk_screen_get_width (screen); height = gdk_screen_get_height (screen); fade = gnome_bg_crossfade_new (width, height); display = gdk_screen_get_display (screen); gdk_x11_display_grab (display); old_surface = gnome_bg_get_surface_from_root (screen); gnome_bg_set_root_pixmap_id (screen, surface); gnome_bg_crossfade_set_start_surface (fade, old_surface); cairo_surface_destroy (old_surface); gnome_bg_crossfade_set_end_surface (fade, surface); gdk_display_flush (display); gdk_x11_display_ungrab (display); gnome_bg_crossfade_start (fade, root_window); return fade; } /* Implementation of the pixbuf cache */ struct _SlideShow { gint ref_count; double start_time; double total_duration; GQueue *slides; gboolean has_multiple_sizes; /* used during parsing */ struct tm start_tm; GQueue *stack; }; static GdkPixbuf * blend (GdkPixbuf *p1, GdkPixbuf *p2, double alpha) { GdkPixbuf *result = gdk_pixbuf_copy (p1); GdkPixbuf *tmp; if (gdk_pixbuf_get_width (p2) != gdk_pixbuf_get_width (p1) || gdk_pixbuf_get_height (p2) != gdk_pixbuf_get_height (p1)) { tmp = gdk_pixbuf_scale_simple (p2, gdk_pixbuf_get_width (p1), gdk_pixbuf_get_height (p1), GDK_INTERP_BILINEAR); } else { tmp = g_object_ref (p2); } pixbuf_blend (tmp, result, 0, 0, -1, -1, 0, 0, alpha); g_object_unref (tmp); return result; } typedef enum { PIXBUF, SLIDESHOW, THUMBNAIL } FileType; struct FileCacheEntry { FileType type; char *filename; union { GdkPixbuf *pixbuf; GnomeBGSlideShow *slideshow; GdkPixbuf *thumbnail; } u; }; static void file_cache_entry_delete (FileCacheEntry *ent) { g_free (ent->filename); switch (ent->type) { case PIXBUF: g_object_unref (ent->u.pixbuf); break; case SLIDESHOW: g_object_unref (ent->u.slideshow); break; case THUMBNAIL: g_object_unref (ent->u.thumbnail); break; } g_free (ent); } static void bound_cache (GnomeBG *bg) { while (g_list_length (bg->file_cache) >= CACHE_SIZE) { GList *last_link = g_list_last (bg->file_cache); FileCacheEntry *ent = last_link->data; file_cache_entry_delete (ent); bg->file_cache = g_list_delete_link (bg->file_cache, last_link); } } static const FileCacheEntry * file_cache_lookup (GnomeBG *bg, FileType type, const char *filename) { GList *list; for (list = bg->file_cache; list != NULL; list = list->next) { FileCacheEntry *ent = list->data; if (ent && ent->type == type && strcmp (ent->filename, filename) == 0) { return ent; } } return NULL; } static FileCacheEntry * file_cache_entry_new (GnomeBG *bg, FileType type, const char *filename) { FileCacheEntry *ent = g_new0 (FileCacheEntry, 1); g_assert (!file_cache_lookup (bg, type, filename)); ent->type = type; ent->filename = g_strdup (filename); bg->file_cache = g_list_prepend (bg->file_cache, ent); bound_cache (bg); return ent; } static void file_cache_add_pixbuf (GnomeBG *bg, const char *filename, GdkPixbuf *pixbuf) { FileCacheEntry *ent = file_cache_entry_new (bg, PIXBUF, filename); ent->u.pixbuf = g_object_ref (pixbuf); } static void file_cache_add_thumbnail (GnomeBG *bg, const char *filename, GdkPixbuf *pixbuf) { FileCacheEntry *ent = file_cache_entry_new (bg, THUMBNAIL, filename); ent->u.thumbnail = g_object_ref (pixbuf); } static void file_cache_add_slide_show (GnomeBG *bg, const char *filename, GnomeBGSlideShow *show) { FileCacheEntry *ent = file_cache_entry_new (bg, SLIDESHOW, filename); ent->u.slideshow = g_object_ref (show); } static GdkPixbuf * load_from_cache_file (GnomeBG *bg, const char *filename, gint num_monitor, gint best_width, gint best_height) { GdkPixbuf *pixbuf = NULL; gchar *cache_filename; cache_filename = get_wallpaper_cache_filename (filename, num_monitor, bg->placement, best_width, best_height); if (cache_file_is_valid (filename, cache_filename)) pixbuf = gdk_pixbuf_new_from_file (cache_filename, NULL); g_free (cache_filename); return pixbuf; } static GdkPixbuf * get_as_pixbuf_for_size (GnomeBG *bg, const char *filename, gint num_monitor, gint best_width, gint best_height) { const FileCacheEntry *ent; if ((ent = file_cache_lookup (bg, PIXBUF, filename))) { return g_object_ref (ent->u.pixbuf); } else { GdkPixbufFormat *format; GdkPixbuf *pixbuf; gchar *tmp; pixbuf = NULL; /* Try to hit local cache first if relevant */ if (num_monitor != -1) pixbuf = load_from_cache_file (bg, filename, num_monitor, best_width, best_height); if (!pixbuf) { /* If scalable choose maximum size */ format = gdk_pixbuf_get_file_info (filename, NULL, NULL); if (format != NULL) { tmp = gdk_pixbuf_format_get_name (format); } else { tmp = NULL; } if (tmp != NULL && strcmp (tmp, "svg") == 0 && (best_width > 0 && best_height > 0) && (bg->placement == G_DESKTOP_BACKGROUND_STYLE_STRETCHED || bg->placement == G_DESKTOP_BACKGROUND_STYLE_SCALED || bg->placement == G_DESKTOP_BACKGROUND_STYLE_ZOOM)) pixbuf = gdk_pixbuf_new_from_file_at_size (filename, best_width, best_height, NULL); else pixbuf = gdk_pixbuf_new_from_file (filename, NULL); g_free (tmp); } if (pixbuf) file_cache_add_pixbuf (bg, filename, pixbuf); return pixbuf; } } static GnomeBGSlideShow * get_as_slideshow (GnomeBG *bg, const char *filename) { const FileCacheEntry *ent; if ((ent = file_cache_lookup (bg, SLIDESHOW, filename))) { return g_object_ref (ent->u.slideshow); } else { GnomeBGSlideShow *show = read_slideshow_file (filename, NULL); if (show) file_cache_add_slide_show (bg, filename, show); return show; } } static GdkPixbuf * get_as_thumbnail (GnomeBG *bg, GnomeDesktopThumbnailFactory *factory, const char *filename) { const FileCacheEntry *ent; if ((ent = file_cache_lookup (bg, THUMBNAIL, filename))) { return g_object_ref (ent->u.thumbnail); } else { GdkPixbuf *thumb = create_thumbnail_for_filename (factory, filename); if (thumb) file_cache_add_thumbnail (bg, filename, thumb); return thumb; } } static gboolean blow_expensive_caches (gpointer data) { GnomeBG *bg = data; GList *list, *next; bg->blow_caches_id = 0; for (list = bg->file_cache; list != NULL; list = next) { FileCacheEntry *ent = list->data; next = list->next; if (ent->type == PIXBUF) { file_cache_entry_delete (ent); bg->file_cache = g_list_delete_link (bg->file_cache, list); } } if (bg->pixbuf_cache) { g_object_unref (bg->pixbuf_cache); bg->pixbuf_cache = NULL; } return FALSE; } static void blow_expensive_caches_in_idle (GnomeBG *bg) { if (bg->blow_caches_id == 0) { bg->blow_caches_id = g_idle_add (blow_expensive_caches, bg); } } static gboolean on_timeout (gpointer data) { GnomeBG *bg = data; bg->timeout_id = 0; queue_transitioned (bg); return FALSE; } static double get_slide_timeout (gboolean is_fixed, gdouble duration) { double timeout; if (is_fixed) { timeout = duration; } else { /* Maybe the number of steps should be configurable? */ /* In the worst case we will do a fade from 0 to 256, which mean * we will never use more than 255 steps, however in most cases * the first and last value are similar and users can't percieve * changes in pixel values as small as 1/255th. So, lets not waste * CPU cycles on transitioning to often. * * 64 steps is enough for each step to be just detectable in a 16bit * color mode in the worst case, so we'll use this as an approximation * of whats detectable. */ timeout = duration / 64.0; } return timeout; } static void ensure_timeout (GnomeBG *bg, gdouble timeout) { if (!bg->timeout_id) { /* G_MAXUINT means "only one slide" */ if (timeout < G_MAXUINT) { bg->timeout_id = g_timeout_add_full ( G_PRIORITY_LOW, timeout * 1000, on_timeout, bg, NULL); } } } static time_t get_mtime (const char *filename) { GFile *file; GFileInfo *info; time_t mtime; mtime = (time_t)-1; if (filename) { file = g_file_new_for_path (filename); info = g_file_query_info (file, G_FILE_ATTRIBUTE_TIME_MODIFIED, G_FILE_QUERY_INFO_NONE, NULL, NULL); if (info) { mtime = g_file_info_get_attribute_uint64 (info, G_FILE_ATTRIBUTE_TIME_MODIFIED); g_object_unref (info); } g_object_unref (file); } return mtime; } static GdkPixbuf * scale_thumbnail (GDesktopBackgroundStyle placement, const char *filename, GdkPixbuf *thumb, GdkScreen *screen, int dest_width, int dest_height) { int o_width; int o_height; if (placement != G_DESKTOP_BACKGROUND_STYLE_WALLPAPER && placement != G_DESKTOP_BACKGROUND_STYLE_CENTERED) { /* In this case, the pixbuf will be scaled to fit the screen anyway, * so just return the pixbuf here */ return g_object_ref (thumb); } if (get_thumb_annotations (thumb, &o_width, &o_height) || (filename && get_original_size (filename, &o_width, &o_height))) { int scr_height = gdk_screen_get_height (screen); int scr_width = gdk_screen_get_width (screen); int thumb_width = gdk_pixbuf_get_width (thumb); int thumb_height = gdk_pixbuf_get_height (thumb); double screen_to_dest = fit_factor (scr_width, scr_height, dest_width, dest_height); double thumb_to_orig = fit_factor (thumb_width, thumb_height, o_width, o_height); double f = thumb_to_orig * screen_to_dest; int new_width, new_height; new_width = floor (thumb_width * f + 0.5); new_height = floor (thumb_height * f + 0.5); if (placement == G_DESKTOP_BACKGROUND_STYLE_WALLPAPER) { /* Heuristic to make sure tiles don't become so small that * they turn into a blur. * * This is strictly speaking incorrect, but the resulting * thumbnail gives a much better idea what the background * will actually look like. */ if ((new_width < 32 || new_height < 32) && (new_width < o_width / 4 || new_height < o_height / 4)) { new_width = o_width / 4; new_height = o_height / 4; } } thumb = gdk_pixbuf_scale_simple (thumb, new_width, new_height, GDK_INTERP_BILINEAR); } else g_object_ref (thumb); return thumb; } /* frame_num determines which slide to thumbnail. * -1 means 'current slide'. */ static GdkPixbuf * create_img_thumbnail (GnomeBG *bg, GnomeDesktopThumbnailFactory *factory, GdkScreen *screen, int dest_width, int dest_height, int frame_num) { if (bg->filename) { GdkPixbuf *thumb; thumb = get_as_thumbnail (bg, factory, bg->filename); if (thumb) { GdkPixbuf *result; result = scale_thumbnail (bg->placement, bg->filename, thumb, screen, dest_width, dest_height); g_object_unref (thumb); return result; } else { GnomeBGSlideShow *show = get_as_slideshow (bg, bg->filename); if (show) { double alpha; double duration; gboolean is_fixed; const char *file1; const char *file2; GdkPixbuf *tmp; if (frame_num == -1) gnome_bg_slide_show_get_current_slide (show, dest_width, dest_height, &alpha, &duration, &is_fixed, &file1, &file2); else gnome_bg_slide_show_get_slide (show, frame_num, dest_width, dest_height, &alpha, &duration, &is_fixed, &file1, &file2); if (is_fixed) { tmp = get_as_thumbnail (bg, factory, file1); if (tmp) { thumb = scale_thumbnail (bg->placement, file1, tmp, screen, dest_width, dest_height); g_object_unref (tmp); } } else { GdkPixbuf *p1, *p2; p1 = get_as_thumbnail (bg, factory, file1); p2 = get_as_thumbnail (bg, factory, file2); if (p1 && p2) { GdkPixbuf *thumb1, *thumb2; thumb1 = scale_thumbnail (bg->placement, file1, p1, screen, dest_width, dest_height); thumb2 = scale_thumbnail (bg->placement, file2, p2, screen, dest_width, dest_height); thumb = blend (thumb1, thumb2, alpha); g_object_unref (thumb1); g_object_unref (thumb2); } if (p1) g_object_unref (p1); if (p2) g_object_unref (p2); } ensure_timeout (bg, (guint)get_slide_timeout (is_fixed, duration)); g_object_unref (show); } } return thumb; } return NULL; } static GdkPixbuf * get_pixbuf_for_size (GnomeBG *bg, gint num_monitor, gint best_width, gint best_height) { guint time_until_next_change; gboolean hit_cache = FALSE; /* only hit the cache if the aspect ratio matches */ if (bg->pixbuf_cache) { int width, height; width = gdk_pixbuf_get_width (bg->pixbuf_cache); height = gdk_pixbuf_get_height (bg->pixbuf_cache); hit_cache = 0.2 > fabs ((best_width / (double)best_height) - (width / (double)height)); if (!hit_cache) { g_object_unref (bg->pixbuf_cache); bg->pixbuf_cache = NULL; } } if (!hit_cache && bg->filename) { bg->file_mtime = get_mtime (bg->filename); bg->pixbuf_cache = get_as_pixbuf_for_size (bg, bg->filename, num_monitor, best_width, best_height); time_until_next_change = G_MAXUINT; if (!bg->pixbuf_cache) { GnomeBGSlideShow *show = get_as_slideshow (bg, bg->filename); if (show) { double alpha; double duration; gboolean is_fixed; const char *file1; const char *file2; g_object_ref (show); gnome_bg_slide_show_get_current_slide (show, best_width, best_height, &alpha, &duration, &is_fixed, &file1, &file2); time_until_next_change = (guint)get_slide_timeout (is_fixed, duration); if (is_fixed) { bg->pixbuf_cache = get_as_pixbuf_for_size (bg, file1, num_monitor, best_width, best_height); } else { GdkPixbuf *p1, *p2; p1 = get_as_pixbuf_for_size (bg, file1, num_monitor, best_width, best_height); p2 = get_as_pixbuf_for_size (bg, file2, num_monitor, best_width, best_height); if (p1 && p2) { bg->pixbuf_cache = blend (p1, p2, alpha); } if (p1) g_object_unref (p1); if (p2) g_object_unref (p2); } ensure_timeout (bg, time_until_next_change); g_object_unref (show); } } /* If the next slideshow step is a long time away then we blow away the expensive stuff (large pixbufs) from the cache */ if (time_until_next_change > KEEP_EXPENSIVE_CACHE_SECS) blow_expensive_caches_in_idle (bg); } if (bg->pixbuf_cache) g_object_ref (bg->pixbuf_cache); return bg->pixbuf_cache; } static gboolean is_different (GnomeBG *bg, const char *filename) { if (!filename && bg->filename) { return TRUE; } else if (filename && !bg->filename) { return TRUE; } else if (!filename && !bg->filename) { return FALSE; } else { time_t mtime = get_mtime (filename); if (mtime != bg->file_mtime) return TRUE; if (strcmp (filename, bg->filename) != 0) return TRUE; return FALSE; } } static void clear_cache (GnomeBG *bg) { GList *list; if (bg->file_cache) { for (list = bg->file_cache; list != NULL; list = list->next) { FileCacheEntry *ent = list->data; file_cache_entry_delete (ent); } g_list_free (bg->file_cache); bg->file_cache = NULL; } if (bg->pixbuf_cache) { g_object_unref (bg->pixbuf_cache); bg->pixbuf_cache = NULL; } if (bg->timeout_id) { g_source_remove (bg->timeout_id); bg->timeout_id = 0; } } /* Pixbuf utilities */ static void pixbuf_average_value (GdkPixbuf *pixbuf, GdkRGBA *result) { guint64 a_total, r_total, g_total, b_total; guint row, column; int row_stride; const guchar *pixels, *p; int r, g, b, a; guint64 dividend; guint width, height; gdouble dd; width = gdk_pixbuf_get_width (pixbuf); height = gdk_pixbuf_get_height (pixbuf); row_stride = gdk_pixbuf_get_rowstride (pixbuf); pixels = gdk_pixbuf_get_pixels (pixbuf); /* iterate through the pixbuf, counting up each component */ a_total = 0; r_total = 0; g_total = 0; b_total = 0; if (gdk_pixbuf_get_has_alpha (pixbuf)) { for (row = 0; row < height; row++) { p = pixels + (row * row_stride); for (column = 0; column < width; column++) { r = *p++; g = *p++; b = *p++; a = *p++; a_total += a; r_total += r * a; g_total += g * a; b_total += b * a; } } dividend = height * width * 0xFF; a_total *= 0xFF; } else { for (row = 0; row < height; row++) { p = pixels + (row * row_stride); for (column = 0; column < width; column++) { r = *p++; g = *p++; b = *p++; r_total += r; g_total += g; b_total += b; } } dividend = height * width; a_total = dividend * 0xFF; } dd = dividend * 0xFF; result->alpha = a_total / dd; result->red = r_total / dd; result->green = g_total / dd; result->blue = b_total / dd; } static GdkPixbuf * pixbuf_scale_to_fit (GdkPixbuf *src, int max_width, int max_height) { double factor; int src_width, src_height; int new_width, new_height; src_width = gdk_pixbuf_get_width (src); src_height = gdk_pixbuf_get_height (src); factor = MIN (max_width / (double) src_width, max_height / (double) src_height); new_width = floor (src_width * factor + 0.5); new_height = floor (src_height * factor + 0.5); return gdk_pixbuf_scale_simple (src, new_width, new_height, GDK_INTERP_BILINEAR); } static GdkPixbuf * pixbuf_scale_to_min (GdkPixbuf *src, int min_width, int min_height) { double factor; int src_width, src_height; int new_width, new_height; GdkPixbuf *dest; src_width = gdk_pixbuf_get_width (src); src_height = gdk_pixbuf_get_height (src); factor = MAX (min_width / (double) src_width, min_height / (double) src_height); new_width = floor (src_width * factor + 0.5); new_height = floor (src_height * factor + 0.5); dest = gdk_pixbuf_new (GDK_COLORSPACE_RGB, gdk_pixbuf_get_has_alpha (src), 8, min_width, min_height); if (!dest) return NULL; /* crop the result */ gdk_pixbuf_scale (src, dest, 0, 0, min_width, min_height, (new_width - min_width) / -2, (new_height - min_height) / -2, factor, factor, GDK_INTERP_BILINEAR); return dest; } static guchar * create_gradient (const GdkColor *primary, const GdkColor *secondary, int n_pixels) { guchar *result = g_malloc (n_pixels * 3); int i; for (i = 0; i < n_pixels; ++i) { double ratio = (i + 0.5) / n_pixels; result[3 * i + 0] = ((guint16) (primary->red * (1 - ratio) + secondary->red * ratio)) >> 8; result[3 * i + 1] = ((guint16) (primary->green * (1 - ratio) + secondary->green * ratio)) >> 8; result[3 * i + 2] = ((guint16) (primary->blue * (1 - ratio) + secondary->blue * ratio)) >> 8; } return result; } static void pixbuf_draw_gradient (GdkPixbuf *pixbuf, gboolean horizontal, GdkColor *primary, GdkColor *secondary, GdkRectangle *rect) { int width; int height; int rowstride; guchar *dst; int n_channels = 3; rowstride = gdk_pixbuf_get_rowstride (pixbuf); width = rect->width; height = rect->height; dst = gdk_pixbuf_get_pixels (pixbuf) + rect->x * n_channels + rowstride * rect->y; if (horizontal) { guchar *gradient = create_gradient (primary, secondary, width); int copy_bytes_per_row = width * n_channels; int i; for (i = 0; i < height; i++) { guchar *d; d = dst + rowstride * i; memcpy (d, gradient, copy_bytes_per_row); } g_free (gradient); } else { guchar *gb, *gradient; int i; gradient = create_gradient (primary, secondary, height); for (i = 0; i < height; i++) { int j; guchar *d; d = dst + rowstride * i; gb = gradient + n_channels * i; for (j = width; j > 0; j--) { int k; for (k = 0; k < n_channels; k++) { *(d++) = gb[k]; } } } g_free (gradient); } } static void pixbuf_blend (GdkPixbuf *src, GdkPixbuf *dest, int src_x, int src_y, int src_width, int src_height, int dest_x, int dest_y, double alpha) { int dest_width = gdk_pixbuf_get_width (dest); int dest_height = gdk_pixbuf_get_height (dest); int offset_x = dest_x - src_x; int offset_y = dest_y - src_y; if (src_width < 0) src_width = gdk_pixbuf_get_width (src); if (src_height < 0) src_height = gdk_pixbuf_get_height (src); if (dest_x < 0) dest_x = 0; if (dest_y < 0) dest_y = 0; if (dest_x + src_width > dest_width) { src_width = dest_width - dest_x; } if (dest_y + src_height > dest_height) { src_height = dest_height - dest_y; } gdk_pixbuf_composite (src, dest, dest_x, dest_y, src_width, src_height, offset_x, offset_y, 1, 1, GDK_INTERP_NEAREST, alpha * 0xFF + 0.5); } static void pixbuf_tile (GdkPixbuf *src, GdkPixbuf *dest) { int x, y; int tile_width, tile_height; int dest_width = gdk_pixbuf_get_width (dest); int dest_height = gdk_pixbuf_get_height (dest); tile_width = gdk_pixbuf_get_width (src); tile_height = gdk_pixbuf_get_height (src); for (y = 0; y < dest_height; y += tile_height) { for (x = 0; x < dest_width; x += tile_width) { pixbuf_blend (src, dest, 0, 0, tile_width, tile_height, x, y, 1.0); } } } static GnomeBGSlideShow * read_slideshow_file (const char *filename, GError **err) { GnomeBGSlideShow *show; show = gnome_bg_slide_show_new (filename); if (!gnome_bg_slide_show_load (show, err)) { g_object_unref (show); return NULL; } return show; } /* Thumbnail utilities */ static GdkPixbuf * create_thumbnail_for_filename (GnomeDesktopThumbnailFactory *factory, const char *filename) { char *thumb; time_t mtime; GdkPixbuf *orig, *result = NULL; char *uri; mtime = get_mtime (filename); if (mtime == (time_t)-1) return NULL; uri = g_filename_to_uri (filename, NULL, NULL); if (uri == NULL) return NULL; thumb = gnome_desktop_thumbnail_factory_lookup (factory, uri, mtime); if (thumb) { result = gdk_pixbuf_new_from_file (thumb, NULL); g_free (thumb); } else { orig = gdk_pixbuf_new_from_file (filename, NULL); if (orig) { int orig_width = gdk_pixbuf_get_width (orig); int orig_height = gdk_pixbuf_get_height (orig); result = pixbuf_scale_to_fit (orig, THUMBNAIL_SIZE, THUMBNAIL_SIZE); g_object_set_data_full (G_OBJECT (result), "gnome-thumbnail-height", g_strdup_printf ("%d", orig_height), g_free); g_object_set_data_full (G_OBJECT (result), "gnome-thumbnail-width", g_strdup_printf ("%d", orig_width), g_free); g_object_unref (orig); gnome_desktop_thumbnail_factory_save_thumbnail (factory, result, uri, mtime); } else { gnome_desktop_thumbnail_factory_create_failed_thumbnail (factory, uri, mtime); } } g_free (uri); return result; } static gboolean get_thumb_annotations (GdkPixbuf *thumb, int *orig_width, int *orig_height) { char *end; const char *wstr, *hstr; wstr = gdk_pixbuf_get_option (thumb, "tEXt::Thumb::Image::Width"); hstr = gdk_pixbuf_get_option (thumb, "tEXt::Thumb::Image::Height"); if (hstr && wstr) { *orig_width = strtol (wstr, &end, 10); if (*end != 0) return FALSE; *orig_height = strtol (hstr, &end, 10); if (*end != 0) return FALSE; return TRUE; } return FALSE; } /* * Returns whether the background is a slideshow. */ gboolean gnome_bg_changes_with_time (GnomeBG *bg) { GnomeBGSlideShow *show; gboolean ret = FALSE; g_return_val_if_fail (bg != NULL, FALSE); if (!bg->filename) return FALSE; show = get_as_slideshow (bg, bg->filename); if (show) { ret = gnome_bg_slide_show_get_num_slides (show) > 1; g_object_unref (show); } return ret; } /** * gnome_bg_create_frame_thumbnail: * * Creates a thumbnail for a certain frame, where 'frame' is somewhat * vaguely defined as 'suitable point to show while single-stepping * through the slideshow'. * * Returns: (transfer full): the newly created thumbnail or * or NULL if frame_num is out of bounds. */ GdkPixbuf * gnome_bg_create_frame_thumbnail (GnomeBG *bg, GnomeDesktopThumbnailFactory *factory, GdkScreen *screen, int dest_width, int dest_height, int frame_num) { GnomeBGSlideShow *show; GdkPixbuf *result; GdkPixbuf *thumb; int skipped; gboolean is_fixed; g_return_val_if_fail (bg != NULL, FALSE); show = get_as_slideshow (bg, bg->filename); if (!show) return NULL; if (frame_num < 0 || frame_num >= gnome_bg_slide_show_get_num_slides (show)) return NULL; gnome_bg_slide_show_get_slide (show, frame_num, dest_width, dest_height, NULL, NULL, &is_fixed, NULL, NULL); skipped = 0; while (!is_fixed) { skipped++; gnome_bg_slide_show_get_slide (show, frame_num, dest_width, dest_height, NULL, NULL, &is_fixed, NULL, NULL); } result = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, dest_width, dest_height); draw_color (bg, result); if (bg->placement != G_DESKTOP_BACKGROUND_STYLE_NONE) { thumb = create_img_thumbnail (bg, factory, screen, dest_width, dest_height, frame_num + skipped); if (thumb) { draw_image_for_thumb (bg, thumb, result); g_object_unref (thumb); } } return result; }