/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- matebg.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 St, 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 #define MATE_DESKTOP_USE_UNSTABLE_API #include #include #if GTK_CHECK_VERSION (3, 0, 0) # include #else #define cairo_surface_t GdkPixmap #define cairo_create gdk_cairo_create #define cairo_surface_destroy g_object_unref #endif #define BG_KEY_DRAW_BACKGROUND "draw-background" #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_FILENAME "picture-filename" /* 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 typedef struct _SlideShow SlideShow; typedef struct _Slide Slide; struct _Slide { double duration; /* in seconds */ gboolean fixed; GSList* file1; GSList* file2; /* NULL if fixed is TRUE */ }; typedef struct _FileSize FileSize; struct _FileSize { gint width; gint height; char* file; }; /* 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 typedef struct FileCacheEntry FileCacheEntry; #define CACHE_SIZE 4 /* * Implementation of the MateBG class */ struct _MateBG { GObject parent_instance; char* filename; MateBGPlacement placement; MateBGColorType 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 */ SlideShow* slideshow; time_t file_mtime; GdkPixbuf* pixbuf_cache; int timeout_id; GList* file_cache; }; struct _MateBGClass { GObjectClass parent_class; }; enum { CHANGED, TRANSITIONED, N_SIGNALS }; static guint signals[N_SIGNALS] = {0}; G_DEFINE_TYPE(MateBG, mate_bg, G_TYPE_OBJECT) #if GTK_CHECK_VERSION (3, 0, 0) static cairo_surface_t *make_root_pixmap (GdkScreen *screen, #else static GdkPixmap *make_root_pixmap (GdkScreen *screen, #endif gint width, gint height); /* Pixbuf utils */ static guint32 pixbuf_average_value (GdkPixbuf *pixbuf); 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 (MateDesktopThumbnailFactory *factory, const char *filename); static gboolean get_thumb_annotations (GdkPixbuf *thumb, int *orig_width, int *orig_height); /* Cache */ static GdkPixbuf *get_pixbuf_for_size (MateBG *bg, int width, int height); static void clear_cache (MateBG *bg); static gboolean is_different (MateBG *bg, const char *filename); static time_t get_mtime (const char *filename); static GdkPixbuf *create_img_thumbnail (MateBG *bg, MateDesktopThumbnailFactory *factory, GdkScreen *screen, int dest_width, int dest_height, int frame_num); static SlideShow * get_as_slideshow (MateBG *bg, const char *filename); static Slide * get_current_slide (SlideShow *show, double *alpha); static gboolean slideshow_has_multiple_sizes (SlideShow *show); static SlideShow *read_slideshow_file (const char *filename, GError **err); static SlideShow *slideshow_ref (SlideShow *show); static void slideshow_unref (SlideShow *show); static FileSize *find_best_size (GSList *sizes, gint width, gint height); 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 (MateBG *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 (MateBG *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 caja 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 (MateBG *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 (MateBG *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); } /* This function load user settings */ void mate_bg_load_from_preferences (MateBG *bg) { GSettings *settings; settings = g_settings_new (MATE_BG_SCHEMA); mate_bg_load_from_gsettings (bg, settings); g_object_unref (settings); } /* This function load system settings */ void mate_bg_load_from_system_preferences (MateBG *bg) { GSettings *settings; gchar **keys; gchar **k; /* FIXME: we need to bind system settings instead of user but * that's currently impossible, not implemented yet. * Hence, reset to system default values. */ settings = g_settings_new (MATE_BG_SCHEMA); g_settings_delay (settings); keys = g_settings_list_keys (settings); for (k = keys; *k; k++) { g_settings_reset (settings, *k); } g_strfreev (keys); mate_bg_load_from_gsettings (bg, settings); g_settings_revert (settings); g_object_unref (settings); } void mate_bg_load_from_gsettings (MateBG *bg, GSettings *settings) { char *tmp; char *filename; MateBGColorType ctype; GdkColor c1, c2; MateBGPlacement placement; g_return_if_fail (MATE_IS_BG (bg)); /* Filename */ filename = NULL; tmp = g_settings_get_string(settings, BG_KEY_PICTURE_FILENAME); if (tmp != NULL && *tmp != '\0') { if (g_utf8_validate (tmp, -1, NULL) && g_file_test (tmp, G_FILE_TEST_EXISTS)) { filename = g_strdup (tmp); } else { filename = g_filename_from_utf8 (tmp, -1, NULL, NULL, NULL); } /* Fall back to default background if filename was set but no longer exists */ if (!g_file_test (filename, G_FILE_TEST_EXISTS)) { g_free (filename); filename = NULL; /* FIXME: default value? */ } } g_free (tmp); /* 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); mate_bg_set_color (bg, ctype, &c1, &c2); mate_bg_set_placement (bg, placement); mate_bg_set_filename (bg, filename); g_free (filename); } void mate_bg_save_to_preferences (MateBG *bg) { MateBGColorType color_type; MateBGPlacement placement; const gchar *filename; gchar *primary; gchar *secondary; GSettings *settings; settings = g_settings_new (MATE_BG_SCHEMA); primary = color_to_string (&bg->primary); secondary = color_to_string (&bg->secondary); color_type = bg->color_type; if (bg->filename) { filename = bg->filename; placement = bg->placement; } else { filename = "(none)"; placement = MATE_BG_PLACEMENT_ZOOMED; } g_settings_set_string (settings, BG_KEY_PICTURE_FILENAME, filename); 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, color_type); g_settings_set_enum (settings, BG_KEY_PICTURE_PLACEMENT, placement); g_object_unref (settings); g_free (primary); g_free (secondary); } static void mate_bg_init (MateBG *bg) { } static void mate_bg_dispose (GObject *object) { MateBG *bg = MATE_BG (object); if (bg->file_monitor) { g_object_unref (bg->file_monitor); bg->file_monitor = NULL; } clear_cache (bg); G_OBJECT_CLASS (mate_bg_parent_class)->dispose (object); } static void mate_bg_finalize (GObject *object) { MateBG *bg = MATE_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; } if (bg->filename) { g_free (bg->filename); bg->filename = NULL; } G_OBJECT_CLASS (mate_bg_parent_class)->finalize (object); } static void mate_bg_class_init (MateBGClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); object_class->dispose = mate_bg_dispose; object_class->finalize = mate_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); } MateBG * mate_bg_new (void) { return g_object_new (MATE_TYPE_BG, NULL); } void mate_bg_set_color (MateBG *bg, MateBGColorType type, GdkColor *primary, GdkColor *secondary) { g_return_if_fail (bg != 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 mate_bg_set_placement (MateBG *bg, MateBGPlacement placement) { g_return_if_fail (bg != NULL); if (bg->placement != placement) { bg->placement = placement; queue_changed (bg); } } MateBGPlacement mate_bg_get_placement (MateBG *bg) { g_return_val_if_fail (bg != NULL, -1); return bg->placement; } void mate_bg_get_color (MateBG *bg, MateBGColorType *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 * mate_bg_get_filename (MateBG *bg) { g_return_val_if_fail (bg != NULL, NULL); return bg->filename; } static void file_changed (GFileMonitor *file_monitor, GFile *child, GFile *other_file, GFileMonitorEvent event_type, gpointer user_data) { MateBG *bg = MATE_BG (user_data); clear_cache (bg); queue_changed (bg); } void mate_bg_set_filename (MateBG *bg, const char *filename) { g_return_if_fail (bg != NULL); if (is_different (bg, filename)) { char *tmp = g_strdup (filename); g_free (bg->filename); bg->filename = tmp; 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 (MateBG *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 MATE_BG_COLOR_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 MATE_BG_COLOR_H_GRADIENT: pixbuf_draw_gradient (dest, TRUE, &(bg->primary), &(bg->secondary), rect); break; case MATE_BG_COLOR_V_GRADIENT: pixbuf_draw_gradient (dest, FALSE, &(bg->primary), &(bg->secondary), rect); break; default: break; } } static void draw_color (MateBG *bg, GdkPixbuf *dest, GdkScreen *screen) { 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 (MateBG *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 (MateBGPlacement 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 MATE_BG_PLACEMENT_SPANNED: new = pixbuf_scale_to_fit (pixbuf, width, height); break; case MATE_BG_PLACEMENT_ZOOMED: new = pixbuf_scale_to_min (pixbuf, width, height); break; case MATE_BG_PLACEMENT_FILL_SCREEN: new = gdk_pixbuf_scale_simple (pixbuf, width, height, GDK_INTERP_BILINEAR); break; case MATE_BG_PLACEMENT_SCALED: new = pixbuf_scale_to_fit (pixbuf, width, height); break; case MATE_BG_PLACEMENT_CENTERED: case MATE_BG_PLACEMENT_TILED: 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 (MateBGPlacement placement, 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 (placement, pixbuf, dest_width, dest_height, &x, &y, &w, &h); switch (placement) { case MATE_BG_PLACEMENT_TILED: pixbuf_tile (scaled, dest); break; case MATE_BG_PLACEMENT_ZOOMED: case MATE_BG_PLACEMENT_CENTERED: case MATE_BG_PLACEMENT_FILL_SCREEN: case MATE_BG_PLACEMENT_SCALED: pixbuf_blend (scaled, dest, 0, 0, w, h, x + area->x, y + area->y, 1.0); break; case MATE_BG_PLACEMENT_SPANNED: pixbuf_blend (scaled, dest, 0, 0, w, h, x, y, 1.0); break; default: g_assert_not_reached (); break; } g_object_unref (scaled); } static void draw_image (MateBGPlacement placement, 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 (placement, pixbuf, dest, &rect); } static void draw_once (MateBG *bg, GdkPixbuf *dest, GdkScreen *screen) { GdkRectangle rect; GdkPixbuf *pixbuf; 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, gdk_pixbuf_get_width (dest), gdk_pixbuf_get_height (dest)); if (pixbuf) { draw_image_area (bg->placement, pixbuf, dest, &rect); g_object_unref (pixbuf); } } static void draw_each_monitor (MateBG *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, rect.width, rect.height); if (pixbuf) { draw_image_area (bg->placement, pixbuf, dest, &rect); g_object_unref (pixbuf); } } } void mate_bg_draw (MateBG *bg, GdkPixbuf *dest, GdkScreen *screen, gboolean is_root) { if (!bg) return; if (is_root && (bg->placement != MATE_BG_PLACEMENT_SPANNED)) { draw_color_each_monitor (bg, dest, screen); draw_each_monitor (bg, dest, screen); } else { draw_color (bg, dest, screen); draw_once (bg, dest, screen); } } gboolean mate_bg_has_multiple_sizes (MateBG *bg) { SlideShow *show; gboolean ret; g_return_val_if_fail (bg != NULL, FALSE); ret = FALSE; show = get_as_slideshow (bg, bg->filename); if (show) { ret = slideshow_has_multiple_sizes (show); slideshow_unref (show); } return ret; } static void mate_bg_get_pixmap_size (MateBG *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 MATE_BG_COLOR_SOLID: *pixmap_width = 1; *pixmap_height = 1; break; case MATE_BG_COLOR_H_GRADIENT: case MATE_BG_COLOR_V_GRADIENT: break; } return; } } /** * mate_bg_create_surface: * @bg: MateBG * @window: * @width: * @height: * @is_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. **/ #if GTK_CHECK_VERSION (3, 0, 0) cairo_surface_t * mate_bg_create_surface (MateBG *bg, #else GdkPixmap * mate_bg_create_pixmap (MateBG *bg, #endif GdkWindow *window, int width, int height, gboolean is_root) { int pm_width, pm_height; cairo_surface_t *surface; 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 */ mate_bg_get_pixmap_size (bg, width, height, &pm_width, &pm_height); if (is_root) { surface = make_root_pixmap (gdk_window_get_screen(window), pm_width, pm_height); } else { #if GTK_CHECK_VERSION (3, 0, 0) surface = gdk_window_create_similar_surface (window, CAIRO_CONTENT_COLOR, pm_width, pm_height); #else surface = gdk_pixmap_new (window, pm_width, pm_height, -1); #endif } cr = cairo_create (surface); if (!bg->filename && bg->color_type == MATE_BG_COLOR_SOLID) { gdk_cairo_set_source_color (cr, &(bg->primary)); } else { GdkPixbuf *pixbuf; pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, width, height); mate_bg_draw (bg, pixbuf, gdk_window_get_screen (window), is_root); gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0); g_object_unref (pixbuf); } cairo_paint (cr); cairo_destroy (cr); return surface; } /* determine if a background is darker or lighter than average, to help * clients know what colors to draw on top with */ gboolean mate_bg_is_dark (MateBG *bg, int width, int height) { GdkColor color; int intensity; GdkPixbuf *pixbuf; g_return_val_if_fail (bg != NULL, FALSE); if (bg->color_type == MATE_BG_COLOR_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, width, height); if (pixbuf) { guint32 argb = pixbuf_average_value (pixbuf); guchar a = (argb >> 24) & 0xff; guchar r = (argb >> 16) & 0xff; guchar g = (argb >> 8) & 0xff; guchar b = (argb >> 0) & 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. */ #if GTK_CHECK_VERSION (3, 0, 0) static cairo_surface_t * #else static GdkPixmap * #endif 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); #if GTK_CHECK_VERSION (3, 0, 0) surface = cairo_xlib_surface_create (GDK_SCREEN_XDISPLAY (screen), result, GDK_VISUAL_XVISUAL (gdk_screen_get_system_visual (screen)), width, height); #else surface = gdk_pixmap_foreign_new_for_screen (screen, result, width, height, depth); gdk_drawable_set_colormap ( GDK_DRAWABLE (surface), gdk_drawable_get_colormap (gdk_screen_get_root_window (screen))); #endif 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 (MateBG *bg, gint best_width, gint best_height) { SlideShow *show; Slide *slide; FileSize *size; if (!bg->filename) return NULL; show = get_as_slideshow (bg, bg->filename); if (!show) { return bg->filename; } slide = get_current_slide (show, NULL); slideshow_unref (show); size = find_best_size (slide->file1, best_width, best_height); return size->file; } gboolean mate_bg_get_image_size (MateBG *bg, MateDesktopThumbnailFactory *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); } GdkPixbuf * mate_bg_create_thumbnail (MateBG *bg, MateDesktopThumbnailFactory *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, screen); thumb = create_img_thumbnail (bg, factory, screen, dest_width, dest_height, -1); if (thumb) { draw_image (bg->placement, thumb, result); g_object_unref (thumb); } return result; } /** * mate_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 surface 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 **/ #if GTK_CHECK_VERSION (3, 0, 0) cairo_surface_t * mate_bg_get_surface_from_root (GdkScreen *screen) #else GdkPixmap * mate_bg_get_pixmap_from_root (GdkScreen *screen) #endif { 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) { gdk_error_trap_push (); #if GTK_CHECK_VERSION (3, 0, 0) Pixmap xpixmap = *(Pixmap *) data; Window root_return; int x_ret, y_ret; unsigned int w_ret, h_ret, bw_ret, depth_ret; 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 (); #else source_pixmap = gdk_pixmap_foreign_new (*(Pixmap *) data); gdk_error_trap_pop (); if (source_pixmap != NULL) { gdk_drawable_set_colormap (source_pixmap, gdk_screen_get_default_colormap (screen)); } #endif } width = gdk_screen_get_width (screen); height = gdk_screen_get_height (screen); #if GTK_CHECK_VERSION (3, 0, 0) 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); } #else surface = gdk_pixmap_new (source_pixmap != NULL? source_pixmap : gdk_screen_get_root_window (screen), width, height, -1); cr = gdk_cairo_create (surface); if (source_pixmap != NULL) { gdk_cairo_set_source_pixmap (cr, source_pixmap, 0, 0); cairo_pattern_t *pattern = cairo_get_source (cr); cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT); } else { cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); } cairo_paint (cr); if (cairo_status (cr) != CAIRO_STATUS_SUCCESS) { g_object_unref (surface); surface = NULL; } cairo_destroy (cr); #endif if (source_pixmap != NULL) cairo_surface_destroy (source_pixmap); if (data != NULL) XFree (data); return surface; } static void mate_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; 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); #if GTK_CHECK_VERSION (3, 0, 0) gdk_error_trap_pop_ignored (); #else gdk_flush (); gdk_error_trap_pop (); #endif } XFree (data_esetroot); } #if GTK_CHECK_VERSION (3, 0, 0) pixmap_id = cairo_xlib_surface_get_drawable (surface); #else pixmap_id = GDK_WINDOW_XWINDOW (surface); #endif 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); } /** * mate_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 mate_bg_create_surface(). **/ void #if GTK_CHECK_VERSION (3, 0, 0) mate_bg_set_surface_as_root (GdkScreen *screen, cairo_surface_t *surface) #else mate_bg_set_pixmap_as_root (GdkScreen *screen, GdkPixmap *surface) #endif { Display *display; int screen_num; g_return_if_fail (screen != NULL); #if GTK_CHECK_VERSION (3, 0, 0) g_return_if_fail (cairo_surface_get_type (surface) == CAIRO_SURFACE_TYPE_XLIB); #else g_return_if_fail (surface != NULL); #endif 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)); mate_bg_set_root_pixmap_id (screen, surface); XSetWindowBackgroundPixmap (display, RootWindow (display, screen_num), #if GTK_CHECK_VERSION (3, 0, 0) cairo_xlib_surface_get_drawable (surface)); #else GDK_PIXMAP_XID (surface)); #endif XClearWindow (display, RootWindow (display, screen_num)); gdk_display_flush (gdk_screen_get_display (screen)); gdk_x11_display_ungrab (gdk_screen_get_display (screen)); } /** * mate_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 * @context: a #GMainContext or %NULL * * Set the root pixmap, and properties pointing to it. * This function differs from mate_bg_set_surface_as_root() * in that it adds a subtle crossfade animation from the * current root pixmap to the new one. * * Return value: a #MateBGCrossfade object **/ MateBGCrossfade * #if GTK_CHECK_VERSION (3, 0, 0) mate_bg_set_surface_as_root_with_crossfade (GdkScreen *screen, cairo_surface_t *surface) #else mate_bg_set_pixmap_as_root_with_crossfade (GdkScreen *screen, GdkPixmap *surface) #endif { GdkDisplay *display; GdkWindow *root_window; cairo_surface_t *old_surface; int width, height; MateBGCrossfade *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 = mate_bg_crossfade_new (width, height); display = gdk_screen_get_display (screen); gdk_x11_display_grab (display); #if GTK_CHECK_VERSION (3, 0, 0) old_surface = mate_bg_get_surface_from_root (screen); mate_bg_set_root_pixmap_id (screen, surface); mate_bg_crossfade_set_start_surface (fade, old_surface); cairo_surface_destroy (old_surface); mate_bg_crossfade_set_end_surface (fade, surface); #else old_surface = mate_bg_get_pixmap_from_root (screen); mate_bg_set_root_pixmap_id (screen, surface); mate_bg_crossfade_set_start_pixmap (fade, old_surface); cairo_surface_destroy (old_surface); mate_bg_crossfade_set_end_pixmap (fade, surface); #endif gdk_display_flush (display); gdk_x11_display_ungrab (display); mate_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 double now (void) { GTimeVal tv; g_get_current_time (&tv); return (double)tv.tv_sec + (tv.tv_usec / 1000000.0); } static Slide * get_current_slide (SlideShow *show, double *alpha) { double delta = fmod (now() - show->start_time, show->total_duration); GList *list; double elapsed; int i; if (delta < 0) delta += show->total_duration; elapsed = 0; i = 0; for (list = show->slides->head; list != NULL; list = list->next) { Slide *slide = list->data; if (elapsed + slide->duration > delta) { if (alpha) *alpha = (delta - elapsed) / (double)slide->duration; return slide; } i++; elapsed += slide->duration; } /* this should never happen since we have slides and we should always * find a current slide for the elapsed time since beginning -- we're * looping with fmod() */ g_assert_not_reached (); return NULL; } 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; SlideShow *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: slideshow_unref (ent->u.slideshow); break; case THUMBNAIL: g_object_unref (ent->u.thumbnail); break; } g_free (ent); } static void bound_cache (MateBG *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 (MateBG *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 (MateBG *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 (MateBG *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 (MateBG *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 (MateBG *bg, const char *filename, SlideShow *show) { FileCacheEntry *ent = file_cache_entry_new (bg, SLIDESHOW, filename); ent->u.slideshow = slideshow_ref (show); } static GdkPixbuf * get_as_pixbuf_for_size (MateBG *bg, const char *filename, int best_width, int 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 = NULL; /* 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 && g_strcmp0 (tmp, "svg") == 0 && (best_width > 0 && best_height > 0) && (bg->placement == MATE_BG_PLACEMENT_FILL_SCREEN || bg->placement == MATE_BG_PLACEMENT_SCALED || bg->placement == MATE_BG_PLACEMENT_ZOOMED)) pixbuf = gdk_pixbuf_new_from_file_at_size (filename, best_width, best_height, NULL); else pixbuf = gdk_pixbuf_new_from_file (filename, NULL); if (tmp != NULL) g_free (tmp); if (pixbuf) file_cache_add_pixbuf (bg, filename, pixbuf); return pixbuf; } } static SlideShow * get_as_slideshow (MateBG *bg, const char *filename) { const FileCacheEntry *ent; if ((ent = file_cache_lookup (bg, SLIDESHOW, filename))) { return slideshow_ref (ent->u.slideshow); } else { SlideShow *show = read_slideshow_file (filename, NULL); if (show) file_cache_add_slide_show (bg, filename, show); return show; } } static GdkPixbuf * get_as_thumbnail (MateBG *bg, MateDesktopThumbnailFactory *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) { MateBG *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 (MateBG *bg) { if (bg->blow_caches_id == 0) { bg->blow_caches_id = g_idle_add (blow_expensive_caches, bg); } } static gboolean on_timeout (gpointer data) { MateBG *bg = data; bg->timeout_id = 0; queue_transitioned (bg); return FALSE; } static double get_slide_timeout (Slide *slide) { double timeout; if (slide->fixed) { timeout = slide->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 = slide->duration / 64.0; } return timeout; } static void ensure_timeout (MateBG *bg, Slide *slide) { if (!bg->timeout_id) { double timeout = get_slide_timeout (slide); 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 (MateBGPlacement placement, const char *filename, GdkPixbuf *thumb, GdkScreen *screen, int dest_width, int dest_height) { int o_width; int o_height; if (placement != MATE_BG_PLACEMENT_TILED && placement != MATE_BG_PLACEMENT_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 == MATE_BG_PLACEMENT_TILED) { /* 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 (MateBG *bg, MateDesktopThumbnailFactory *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 { SlideShow *show = get_as_slideshow (bg, bg->filename); if (show) { double alpha; Slide *slide; if (frame_num == -1) slide = get_current_slide (show, &alpha); else slide = g_queue_peek_nth (show->slides, frame_num); if (slide->fixed) { GdkPixbuf *tmp; FileSize *fs; fs = find_best_size (slide->file1, dest_width, dest_height); tmp = get_as_thumbnail (bg, factory, fs->file); if (tmp) { thumb = scale_thumbnail (bg->placement, fs->file, tmp, screen, dest_width, dest_height); g_object_unref (tmp); } } else { FileSize *fs1, *fs2; GdkPixbuf *p1, *p2; fs1 = find_best_size (slide->file1, dest_width, dest_height); p1 = get_as_thumbnail (bg, factory, fs1->file); fs2 = find_best_size (slide->file2, dest_width, dest_height); p2 = get_as_thumbnail (bg, factory, fs2->file); if (p1 && p2) { GdkPixbuf *thumb1, *thumb2; thumb1 = scale_thumbnail (bg->placement, fs1->file, p1, screen, dest_width, dest_height); thumb2 = scale_thumbnail (bg->placement, fs2->file, 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, slide); slideshow_unref (show); } } return thumb; } return NULL; } /* * Find the FileSize that best matches the given size. * Do two passes; the first pass only considers FileSizes * that are larger than the given size. * We are looking for the image that best matches the aspect ratio. * When two images have the same aspect ratio, prefer the one whose * width is closer to the given width. */ static FileSize * find_best_size (GSList *sizes, gint width, gint height) { GSList *s; gdouble a, d, distance; FileSize *best = NULL; gint pass; a = width/(gdouble)height; distance = 10000.0; for (pass = 0; pass < 2; pass++) { for (s = sizes; s; s = s->next) { FileSize *size = s->data; if (pass == 0 && (size->width < width || size->height < height)) continue; d = fabs (a - size->width/(gdouble)size->height); if (d < distance) { distance = d; best = size; } else if (d == distance) { if (abs (size->width - width) < abs (best->width - width)) { best = size; } } } if (best) break; } return best; } static GdkPixbuf * get_pixbuf_for_size (MateBG *bg, 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, best_width, best_height); time_until_next_change = G_MAXUINT; if (!bg->pixbuf_cache) { SlideShow *show = get_as_slideshow (bg, bg->filename); if (show) { double alpha; Slide *slide; slideshow_ref (show); slide = get_current_slide (show, &alpha); time_until_next_change = (guint)get_slide_timeout (slide); if (slide->fixed) { FileSize *size; size = find_best_size (slide->file1, best_width, best_height); bg->pixbuf_cache = get_as_pixbuf_for_size (bg, size->file, best_width, best_height); } else { FileSize *size; GdkPixbuf *p1, *p2; size = find_best_size (slide->file1, best_width, best_height); p1 = get_as_pixbuf_for_size (bg, size->file, best_width, best_height); size = find_best_size (slide->file2, best_width, best_height); p2 = get_as_pixbuf_for_size (bg, size->file, 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, slide); slideshow_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 (MateBG *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 (MateBG *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 guint32 pixbuf_average_value (GdkPixbuf *pixbuf) { 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; 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; } return ((a_total + dividend / 2) / dividend) << 24 | ((r_total + dividend / 2) / dividend) << 16 | ((g_total + dividend / 2) / dividend) << 8 | ((b_total + dividend / 2) / dividend); } 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; guchar *dst_limit; 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; dst_limit = dst + height * rowstride; 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 gboolean stack_is (SlideShow *parser, const char *s1, ...); /* Parser for fading background */ static void handle_start_element (GMarkupParseContext *context, const gchar *name, const gchar **attr_names, const gchar **attr_values, gpointer user_data, GError **err) { SlideShow *parser = user_data; gint i; if (strcmp (name, "static") == 0 || strcmp (name, "transition") == 0) { Slide *slide = g_new0 (Slide, 1); if (strcmp (name, "static") == 0) slide->fixed = TRUE; g_queue_push_tail (parser->slides, slide); } else if (strcmp (name, "size") == 0) { Slide *slide = parser->slides->tail->data; FileSize *size = g_new0 (FileSize, 1); for (i = 0; attr_names[i]; i++) { if (strcmp (attr_names[i], "width") == 0) size->width = atoi (attr_values[i]); else if (strcmp (attr_names[i], "height") == 0) size->height = atoi (attr_values[i]); } if (parser->stack->tail && (strcmp (parser->stack->tail->data, "file") == 0 || strcmp (parser->stack->tail->data, "from") == 0)) { slide->file1 = g_slist_prepend (slide->file1, size); } else if (parser->stack->tail && strcmp (parser->stack->tail->data, "to") == 0) { slide->file2 = g_slist_prepend (slide->file2, size); } } g_queue_push_tail (parser->stack, g_strdup (name)); } static void handle_end_element (GMarkupParseContext *context, const gchar *name, gpointer user_data, GError **err) { SlideShow *parser = user_data; g_free (g_queue_pop_tail (parser->stack)); } static gboolean stack_is (SlideShow *parser, const char *s1, ...) { GList *stack = NULL; const char *s; GList *l1, *l2; va_list args; stack = g_list_prepend (stack, (gpointer)s1); va_start (args, s1); s = va_arg (args, const char *); while (s) { stack = g_list_prepend (stack, (gpointer)s); s = va_arg (args, const char *); } l1 = stack; l2 = parser->stack->head; while (l1 && l2) { if (strcmp (l1->data, l2->data) != 0) { g_list_free (stack); return FALSE; } l1 = l1->next; l2 = l2->next; } g_list_free (stack); return (!l1 && !l2); } static int parse_int (const char *text) { return strtol (text, NULL, 0); } static void handle_text (GMarkupParseContext *context, const gchar *text, gsize text_len, gpointer user_data, GError **err) { SlideShow *parser = user_data; Slide *slide = parser->slides->tail? parser->slides->tail->data : NULL; FileSize *fs; gint i; if (stack_is (parser, "year", "starttime", "background", NULL)) { parser->start_tm.tm_year = parse_int (text) - 1900; } else if (stack_is (parser, "month", "starttime", "background", NULL)) { parser->start_tm.tm_mon = parse_int (text) - 1; } else if (stack_is (parser, "day", "starttime", "background", NULL)) { parser->start_tm.tm_mday = parse_int (text); } else if (stack_is (parser, "hour", "starttime", "background", NULL)) { parser->start_tm.tm_hour = parse_int (text) - 1; } else if (stack_is (parser, "minute", "starttime", "background", NULL)) { parser->start_tm.tm_min = parse_int (text); } else if (stack_is (parser, "second", "starttime", "background", NULL)) { parser->start_tm.tm_sec = parse_int (text); } else if (stack_is (parser, "duration", "static", "background", NULL) || stack_is (parser, "duration", "transition", "background", NULL)) { slide->duration = g_strtod (text, NULL); parser->total_duration += slide->duration; } else if (stack_is (parser, "file", "static", "background", NULL) || stack_is (parser, "from", "transition", "background", NULL)) { for (i = 0; text[i]; i++) { if (!g_ascii_isspace (text[i])) break; } if (text[i] == 0) return; fs = g_new (FileSize, 1); fs->width = -1; fs->height = -1; fs->file = g_strdup (text); slide->file1 = g_slist_prepend (slide->file1, fs); if (slide->file1->next != NULL) parser->has_multiple_sizes = TRUE; } else if (stack_is (parser, "size", "file", "static", "background", NULL) || stack_is (parser, "size", "from", "transition", "background", NULL)) { fs = slide->file1->data; fs->file = g_strdup (text); if (slide->file1->next != NULL) parser->has_multiple_sizes = TRUE; } else if (stack_is (parser, "to", "transition", "background", NULL)) { for (i = 0; text[i]; i++) { if (!g_ascii_isspace (text[i])) break; } if (text[i] == 0) return; fs = g_new (FileSize, 1); fs->width = -1; fs->height = -1; fs->file = g_strdup (text); slide->file2 = g_slist_prepend (slide->file2, fs); if (slide->file2->next != NULL) parser->has_multiple_sizes = TRUE; } else if (stack_is (parser, "size", "to", "transition", "background", NULL)) { fs = slide->file2->data; fs->file = g_strdup (text); if (slide->file2->next != NULL) parser->has_multiple_sizes = TRUE; } } static SlideShow * slideshow_ref (SlideShow *show) { show->ref_count++; return show; } static void slideshow_unref (SlideShow *show) { GList *list; GSList *slist; FileSize *size; show->ref_count--; if (show->ref_count > 0) return; for (list = show->slides->head; list != NULL; list = list->next) { Slide *slide = list->data; for (slist = slide->file1; slist != NULL; slist = slist->next) { size = slist->data; g_free (size->file); g_free (size); } g_slist_free (slide->file1); for (slist = slide->file2; slist != NULL; slist = slist->next) { size = slist->data; g_free (size->file); g_free (size); } g_slist_free (slide->file2); g_free (slide); } g_queue_free (show->slides); g_list_foreach (show->stack->head, (GFunc) g_free, NULL); g_queue_free (show->stack); g_free (show); } static void dump_bg (SlideShow *show) { #if 0 GList *list; GSList *slist; for (list = show->slides->head; list != NULL; list = list->next) { Slide *slide = list->data; g_print ("\nSlide: %s\n", slide->fixed? "fixed" : "transition"); g_print ("duration: %f\n", slide->duration); g_print ("File1:\n"); for (slist = slide->file1; slist != NULL; slist = slist->next) { FileSize *size = slist->data; g_print ("\t%s (%dx%d)\n", size->file, size->width, size->height); } g_print ("File2:\n"); for (slist = slide->file2; slist != NULL; slist = slist->next) { FileSize *size = slist->data; g_print ("\t%s (%dx%d)\n", size->file, size->width, size->height); } } #endif } static void threadsafe_localtime (time_t time, struct tm *tm) { struct tm *res; G_LOCK_DEFINE_STATIC (localtime_mutex); G_LOCK (localtime_mutex); res = localtime (&time); if (tm) { *tm = *res; } G_UNLOCK (localtime_mutex); } static SlideShow * read_slideshow_file (const char *filename, GError **err) { GMarkupParser parser = { handle_start_element, handle_end_element, handle_text, NULL, /* passthrough */ NULL, /* error */ }; GFile *file; char *contents = NULL; gsize len; SlideShow *show = NULL; GMarkupParseContext *context = NULL; time_t t; if (!filename) return NULL; file = g_file_new_for_path (filename); if (!g_file_load_contents (file, NULL, &contents, &len, NULL, NULL)) { g_object_unref (file); return NULL; } g_object_unref (file); show = g_new0 (SlideShow, 1); show->ref_count = 1; threadsafe_localtime ((time_t)0, &show->start_tm); show->stack = g_queue_new (); show->slides = g_queue_new (); context = g_markup_parse_context_new (&parser, 0, show, NULL); if (!g_markup_parse_context_parse (context, contents, len, err)) { slideshow_unref (show); show = NULL; } if (show) { if (!g_markup_parse_context_end_parse (context, err)) { slideshow_unref (show); show = NULL; } } g_markup_parse_context_free (context); if (show) { t = mktime (&show->start_tm); show->start_time = (double)t; dump_bg (show); /* no slides, that's not a slideshow */ if (g_queue_get_length (show->slides) == 0) { slideshow_unref (show); show = NULL; } } g_free (contents); return show; } /* Thumbnail utilities */ static GdkPixbuf * create_thumbnail_for_filename (MateDesktopThumbnailFactory *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); thumb = mate_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, 128, 128); g_object_set_data_full (G_OBJECT (result), "mate-thumbnail-height", g_strdup_printf ("%d", orig_height), g_free); g_object_set_data_full (G_OBJECT (result), "mate-thumbnail-width", g_strdup_printf ("%d", orig_width), g_free); g_object_unref (orig); mate_desktop_thumbnail_factory_save_thumbnail (factory, result, uri, mtime); } else { mate_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; } static gboolean slideshow_has_multiple_sizes (SlideShow *show) { return show->has_multiple_sizes; } /* * Returns whether the background is a slideshow. */ gboolean mate_bg_changes_with_time (MateBG *bg) { SlideShow *show; g_return_val_if_fail (bg != NULL, FALSE); show = get_as_slideshow (bg, bg->filename); if (show) return g_queue_get_length (show->slides) > 1; return FALSE; } /* 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 NULL if frame_num is out of bounds. */ GdkPixbuf * mate_bg_create_frame_thumbnail (MateBG *bg, MateDesktopThumbnailFactory *factory, GdkScreen *screen, int dest_width, int dest_height, int frame_num) { SlideShow *show; GdkPixbuf *result; GdkPixbuf *thumb; GList *l; int i, skipped; gboolean found; 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 >= g_queue_get_length (show->slides)) return NULL; i = 0; skipped = 0; found = FALSE; for (l = show->slides->head; l; l = l->next) { Slide *slide = l->data; if (!slide->fixed) { skipped++; continue; } if (i == frame_num) { found = TRUE; break; } i++; } if (!found) return NULL; result = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, dest_width, dest_height); draw_color (bg, result, screen); thumb = create_img_thumbnail (bg, factory, screen, dest_width, dest_height, frame_num + skipped); if (thumb) { draw_image (bg->placement, thumb, result); g_object_unref (thumb); } return result; }