1 files changed, 2930 insertions, 0 deletions
diff --git a/libmate-desktop/mate-bg.c b/libmate-desktop/mate-bg.c
new file mode 100644
index 0000000..3b0f684
--- /dev/null
+++ b/libmate-desktop/mate-bg.c
@@ -0,0 +1,2930 @@
+/* -*- 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., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.
+
+Derived from eel-background.c and eel-gdk-pixbuf-extensions.c by
+Darin Adler <[email protected]> and Ramiro Estrugo <[email protected]>
+
+Author: Soren Sandmann <[email protected]>
+
+*/
+
+#include <string.h>
+#include <math.h>
+#include <stdarg.h>
+#include <stdlib.h>
+
+#include <gio/gio.h>
+
+#include <gdk/gdkx.h>
+#include <X11/Xlib.h>
+#include <X11/Xatom.h>
+
+#include <cairo.h>
+
+#include <mateconf/mateconf-client.h>
+
+#define MATE_DESKTOP_USE_UNSTABLE_API
+#include <libmateui/mate-bg.h>
+#include <libmateui/mate-bg-crossfade.h>
+
+#define BG_KEY_DRAW_BACKGROUND MATE_BG_KEY_DIR "/draw_background"
+#define BG_KEY_PRIMARY_COLOR MATE_BG_KEY_DIR "/primary_color"
+#define BG_KEY_SECONDARY_COLOR MATE_BG_KEY_DIR "/secondary_color"
+#define BG_KEY_COLOR_TYPE MATE_BG_KEY_DIR "/color_shading_type"
+#define BG_KEY_PICTURE_PLACEMENT MATE_BG_KEY_DIR "/picture_options"
+#define BG_KEY_PICTURE_OPACITY MATE_BG_KEY_DIR "/picture_opacity"
+#define BG_KEY_PICTURE_FILENAME MATE_BG_KEY_DIR "/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;
+
+ gint last_pixmap_width;
+ gint last_pixmap_height;
+
+ 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)
+
+static GdkPixmap* make_root_pixmap(GdkScreen* screen, 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 MateConfEnumStringPair placement_lookup[] = {
+ { MATE_BG_PLACEMENT_CENTERED, "centered" },
+ { MATE_BG_PLACEMENT_FILL_SCREEN, "stretched" },
+ { MATE_BG_PLACEMENT_SCALED, "scaled" },
+ { MATE_BG_PLACEMENT_ZOOMED, "zoom" },
+ { MATE_BG_PLACEMENT_TILED, "wallpaper" },
+ { MATE_BG_PLACEMENT_SPANNED, "spanned" },
+ { 0, NULL }
+};
+
+static MateConfEnumStringPair color_type_lookup[] = {
+ { MATE_BG_COLOR_SOLID, "solid" },
+ { MATE_BG_COLOR_H_GRADIENT, "horizontal-gradient" },
+ { MATE_BG_COLOR_V_GRADIENT, "vertical-gradient" },
+ { 0, NULL }
+};
+
+static void
+color_type_from_string (const char *string,
+ MateBGColorType *color_type)
+{
+ *color_type = MATE_BG_COLOR_SOLID;
+
+ if (string) {
+ mateconf_string_to_enum (color_type_lookup,
+ string, (int *)color_type);
+ }
+}
+
+static const char *
+color_type_to_string (MateBGColorType color_type)
+{
+ return mateconf_enum_to_string (color_type_lookup, color_type);
+}
+
+static void
+placement_from_string (const char *string,
+ MateBGPlacement *placement)
+{
+ *placement = MATE_BG_PLACEMENT_ZOOMED;
+
+ if (string) {
+ mateconf_string_to_enum (placement_lookup,
+ string, (int *)placement);
+ }
+}
+
+static const char *
+placement_to_string (MateBGPlacement placement)
+{
+ return mateconf_enum_to_string (placement_lookup, placement);
+}
+
+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);
+}
+
+void
+mate_bg_load_from_preferences (MateBG *bg,
+ MateConfClient *client)
+{
+ char *tmp;
+ char *filename;
+ MateBGColorType ctype;
+ GdkColor c1, c2;
+ MateBGPlacement placement;
+
+ g_return_if_fail (MATE_IS_BG (bg));
+ g_return_if_fail (client != NULL);
+
+ /* Filename */
+ filename = NULL;
+ tmp = mateconf_client_get_string (client, BG_KEY_PICTURE_FILENAME, NULL);
+ 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)) {
+ MateConfValue *default_value;
+
+ g_free (filename);
+ filename = NULL;
+
+ default_value =
+ mateconf_client_get_default_from_schema (client,
+ BG_KEY_PICTURE_FILENAME,
+ NULL);
+ if (default_value != NULL) {
+ filename = g_strdup (mateconf_value_get_string (default_value));
+ mateconf_value_free (default_value);
+ }
+ }
+ }
+ g_free (tmp);
+
+ /* Colors */
+ tmp = mateconf_client_get_string (client, BG_KEY_PRIMARY_COLOR, NULL);
+ color_from_string (tmp, &c1);
+ g_free (tmp);
+
+ tmp = mateconf_client_get_string (client, BG_KEY_SECONDARY_COLOR, NULL);
+ color_from_string (tmp, &c2);
+ g_free (tmp);
+
+ /* Color type */
+ tmp = mateconf_client_get_string (client, BG_KEY_COLOR_TYPE, NULL);
+ color_type_from_string (tmp, &ctype);
+ g_free (tmp);
+
+ /* Placement */
+ tmp = mateconf_client_get_string (client, BG_KEY_PICTURE_PLACEMENT, NULL);
+ placement_from_string (tmp, &placement);
+ g_free (tmp);
+
+ 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,
+ MateConfClient *client)
+{
+ const char *color_type;
+ const char *placement;
+ const gchar *filename;
+ gchar *primary;
+ gchar *secondary;
+
+ primary = color_to_string (&bg->primary);
+ secondary = color_to_string (&bg->secondary);
+
+ color_type = color_type_to_string (bg->color_type);
+
+ if (bg->filename) {
+ filename = bg->filename;
+ placement = placement_to_string (bg->placement);
+ }
+ else {
+ filename = "(none)";
+ placement = "none";
+ }
+
+ mateconf_client_set_string (client, BG_KEY_PICTURE_FILENAME, filename, NULL);
+ mateconf_client_set_string (client, BG_KEY_PRIMARY_COLOR, primary, NULL);
+ mateconf_client_set_string (client, BG_KEY_SECONDARY_COLOR, secondary, NULL);
+ mateconf_client_set_string (client, BG_KEY_COLOR_TYPE, color_type, NULL);
+ mateconf_client_set_string (client, BG_KEY_PICTURE_PLACEMENT, placement, NULL);
+
+ 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_get_pixmap:
+ * @bg: MateBG
+ * @window:
+ * @width:
+ * @height:
+ *
+ * Create a pixmap that can be set as background for @window. If @root is TRUE,
+ * the pixmap 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.
+ *
+ * Since: 2.20
+ **/
+GdkPixmap *
+mate_bg_create_pixmap (MateBG *bg,
+ GdkWindow *window,
+ int width,
+ int height,
+ gboolean is_root)
+{
+ int pm_width, pm_height;
+ GdkPixmap *pixmap;
+ cairo_t *cr;
+
+ g_return_val_if_fail (bg != NULL, NULL);
+ g_return_val_if_fail (window != NULL, NULL);
+
+ if (bg->last_pixmap_width != width ||
+ bg->last_pixmap_height != height) {
+ if (bg->pixbuf_cache) {
+ g_object_unref (bg->pixbuf_cache);
+ bg->pixbuf_cache = NULL;
+ }
+ }
+ bg->last_pixmap_width = width;
+ bg->last_pixmap_height = height;
+
+ /* 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) {
+ pixmap = make_root_pixmap (gdk_drawable_get_screen (window),
+ pm_width, pm_height);
+ }
+ else {
+ pixmap = gdk_pixmap_new (window, pm_width, pm_height, -1);
+ }
+
+ cr = gdk_cairo_create (pixmap);
+ 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_drawable_get_screen (GDK_DRAWABLE (window)), is_root);
+ gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0);
+ g_object_unref (pixbuf);
+ }
+
+ cairo_paint (cr);
+
+ cairo_destroy (cr);
+
+ return pixmap;
+}
+
+
+/* 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.
+ */
+static GdkPixmap *
+make_root_pixmap (GdkScreen *screen, gint width, gint height)
+{
+ Display *display;
+ const char *display_name;
+ Pixmap result;
+ GdkPixmap *gdk_pixmap;
+ 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);
+
+ gdk_pixmap = gdk_pixmap_foreign_new_for_screen (screen, result,
+ width, height, depth);
+
+ gdk_drawable_set_colormap (
+ GDK_DRAWABLE (gdk_pixmap),
+ gdk_drawable_get_colormap (gdk_screen_get_root_window (screen)));
+
+ return gdk_pixmap;
+}
+
+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_pixmap_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 pixmap is returned.
+ *
+ * Return value: a #GdkPixmap if successful or %NULL
+ **/
+GdkPixmap *
+mate_bg_get_pixmap_from_root (GdkScreen *screen)
+{
+ int result;
+ gint format;
+ gulong nitems;
+ gulong bytes_after;
+ guchar *data;
+ Atom type;
+ Display *display;
+ int screen_num;
+ GdkPixmap *pixmap;
+ GdkPixmap *source_pixmap;
+ int width, height;
+ cairo_t *cr;
+ cairo_pattern_t *pattern;
+
+ 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);
+ pixmap = 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 ();
+ 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));
+ }
+ }
+
+ width = gdk_screen_get_width (screen);
+ height = gdk_screen_get_height (screen);
+
+ pixmap = gdk_pixmap_new (source_pixmap != NULL? source_pixmap :
+ gdk_screen_get_root_window (screen),
+ width, height, -1);
+
+ cr = gdk_cairo_create (pixmap);
+ if (source_pixmap != NULL) {
+ gdk_cairo_set_source_pixmap (cr, source_pixmap, 0, 0);
+ 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 (pixmap);
+ pixmap = NULL;
+ }
+ cairo_destroy (cr);
+
+ if (source_pixmap != NULL)
+ g_object_unref (source_pixmap);
+
+ if (data != NULL)
+ XFree (data);
+
+ return pixmap;
+}
+
+static void
+mate_bg_set_root_pixmap_id (GdkScreen *screen,
+ GdkPixmap *pixmap)
+{
+ 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);
+ gdk_flush ();
+ gdk_error_trap_pop ();
+ }
+ XFree (data_esetroot);
+ }
+
+ pixmap_id = GDK_WINDOW_XWINDOW (pixmap);
+
+ 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_pixmap_as_root:
+ * @screen: the #GdkScreen to change root background on
+ * @pixmap: the #GdkPixmap to set root background from
+ *
+ * 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). @pixmap should come from a call
+ * to mate_bg_create_pixmap().
+ **/
+void
+mate_bg_set_pixmap_as_root (GdkScreen *screen, GdkPixmap *pixmap)
+{
+ Display *display;
+ int screen_num;
+
+ g_return_if_fail (screen != NULL);
+ g_return_if_fail (pixmap != NULL);
+
+ 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, pixmap);
+
+ XSetWindowBackgroundPixmap (display, RootWindow (display, screen_num),
+ GDK_PIXMAP_XID (pixmap));
+ 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_pixmap_as_root_with_crossfade:
+ * @screen: the #GdkScreen to change root background on
+ * @pixmap: the #GdkPixmap 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_pixmap_as_root()
+ * in that it adds a subtle crossfade animation from the
+ * current root pixmap to the new one.
+ * same conventions we do).
+ *
+ * Return value: a #MateBGCrossfade object
+ **/
+MateBGCrossfade *
+mate_bg_set_pixmap_as_root_with_crossfade (GdkScreen *screen,
+ GdkPixmap *pixmap)
+{
+ GdkDisplay *display;
+ GdkWindow *root_window;
+ GdkPixmap *old_pixmap;
+ int width, height;
+ MateBGCrossfade *fade;
+
+ g_return_val_if_fail (screen != NULL, NULL);
+ g_return_val_if_fail (pixmap != 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);
+ old_pixmap = mate_bg_get_pixmap_from_root (screen);
+ mate_bg_set_root_pixmap_id (screen, pixmap);
+ mate_bg_crossfade_set_start_pixmap (fade, old_pixmap);
+ g_object_unref (old_pixmap);
+ mate_bg_crossfade_set_end_pixmap (fade, pixmap);
+ 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;
+
+ /* If scalable choose maximum size */
+ format = gdk_pixbuf_get_file_info (filename, NULL, NULL);
+ tmp = gdk_pixbuf_format_get_name (format);
+ if (format != NULL &&
+ strcmp (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);
+ 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;
+}
+