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Diffstat (limited to 'src/st/st-texture-cache.c')
| -rw-r--r-- | src/st/st-texture-cache.c | 1688 |
1 files changed, 1688 insertions, 0 deletions
diff --git a/src/st/st-texture-cache.c b/src/st/st-texture-cache.c new file mode 100644 index 0000000..7062221 --- /dev/null +++ b/src/st/st-texture-cache.c @@ -0,0 +1,1688 @@ +/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ +/* + * st-texture-cache.h: Object for loading and caching images as textures + * + * Copyright 2009, 2010 Red Hat, Inc. + * Copyright 2010, Maxim Ermilov + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as + * published by the Free Software Foundation, either version 2.1 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope it will be useful, but WITHOUT ANY + * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for + * more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include "config.h" + +#include "st-image-content.h" +#include "st-texture-cache.h" +#include "st-private.h" +#include "st-settings.h" +#include <gtk/gtk.h> +#include <math.h> +#include <string.h> +#include <glib.h> + +#define CACHE_PREFIX_ICON "icon:" +#define CACHE_PREFIX_FILE "file:" +#define CACHE_PREFIX_FILE_FOR_CAIRO "file-for-cairo:" + +struct _StTextureCachePrivate +{ + GtkIconTheme *icon_theme; + GSettings *settings; + + /* Things that were loaded with a cache policy != NONE */ + GHashTable *keyed_cache; /* char * -> ClutterImage* */ + GHashTable *keyed_surface_cache; /* char * -> cairo_surface_t* */ + + GHashTable *used_scales; /* Set: double */ + + /* Presently this is used to de-duplicate requests for GIcons and async URIs. */ + GHashTable *outstanding_requests; /* char * -> AsyncTextureLoadData * */ + + /* File monitors to evict cache data on changes */ + GHashTable *file_monitors; /* char * -> GFileMonitor * */ + + GCancellable *cancellable; +}; + +static void st_texture_cache_dispose (GObject *object); +static void st_texture_cache_finalize (GObject *object); + +enum +{ + ICON_THEME_CHANGED, + TEXTURE_FILE_CHANGED, + + LAST_SIGNAL +}; + +static guint signals[LAST_SIGNAL] = { 0, }; +G_DEFINE_TYPE(StTextureCache, st_texture_cache, G_TYPE_OBJECT); + +/* We want to preserve the aspect ratio by default, also the default + * pipeline for an empty texture is full opacity white, which we + * definitely don't want. Skip that by setting 0 opacity. + */ +static ClutterActor * +create_invisible_actor (void) +{ + return g_object_new (CLUTTER_TYPE_ACTOR, + "opacity", 0, + "request-mode", CLUTTER_REQUEST_CONTENT_SIZE, + NULL); +} + +/* Reverse the opacity we added while loading */ +static void +set_content_from_image (ClutterActor *actor, + ClutterContent *image) +{ + g_assert (image && CLUTTER_IS_IMAGE (image)); + + clutter_actor_set_content (actor, image); + clutter_actor_set_opacity (actor, 255); +} + +static void +st_texture_cache_class_init (StTextureCacheClass *klass) +{ + GObjectClass *gobject_class = (GObjectClass *)klass; + + gobject_class->dispose = st_texture_cache_dispose; + gobject_class->finalize = st_texture_cache_finalize; + + /** + * StTextureCache::icon-theme-changed: + * @self: a #StTextureCache + * + * Emitted when the icon theme is changed. + */ + signals[ICON_THEME_CHANGED] = + g_signal_new ("icon-theme-changed", + G_TYPE_FROM_CLASS (klass), + G_SIGNAL_RUN_LAST, + 0, /* no default handler slot */ + NULL, NULL, NULL, + G_TYPE_NONE, 0); + + /** + * StTextureCache::texture-file-changed: + * @self: a #StTextureCache + * @file: a #GFile + * + * Emitted when the source file of a texture is changed. + */ + signals[TEXTURE_FILE_CHANGED] = + g_signal_new ("texture-file-changed", + G_TYPE_FROM_CLASS (klass), + G_SIGNAL_RUN_LAST, + 0, /* no default handler slot */ + NULL, NULL, NULL, + G_TYPE_NONE, 1, G_TYPE_FILE); +} + +/* Evicts all cached textures for named icons */ +static void +st_texture_cache_evict_icons (StTextureCache *cache) +{ + GHashTableIter iter; + gpointer key; + gpointer value; + + g_hash_table_iter_init (&iter, cache->priv->keyed_cache); + while (g_hash_table_iter_next (&iter, &key, &value)) + { + const char *cache_key = key; + + /* This is too conservative - it takes out all cached textures + * for GIcons even when they aren't named icons, but it's not + * worth the complexity of parsing the key and calling + * g_icon_new_for_string(); icon theme changes aren't normal */ + if (g_str_has_prefix (cache_key, CACHE_PREFIX_ICON)) + g_hash_table_iter_remove (&iter); + } +} + +static void +on_icon_theme_changed (StSettings *settings, + GParamSpec *pspec, + StTextureCache *cache) +{ + g_autofree gchar *theme = NULL; + + g_cancellable_cancel (cache->priv->cancellable); + g_cancellable_reset (cache->priv->cancellable); + + st_texture_cache_evict_icons (cache); + + g_object_get (settings, "gtk-icon-theme", &theme, NULL); + gtk_icon_theme_set_custom_theme (cache->priv->icon_theme, theme); + + g_signal_emit (cache, signals[ICON_THEME_CHANGED], 0); +} + +static void +on_gtk_icon_theme_changed (GtkIconTheme *icon_theme, + StTextureCache *self) +{ + st_texture_cache_evict_icons (self); + g_signal_emit (self, signals[ICON_THEME_CHANGED], 0); +} + +static void +st_texture_cache_init (StTextureCache *self) +{ + StSettings *settings; + + self->priv = g_new0 (StTextureCachePrivate, 1); + + self->priv->icon_theme = gtk_icon_theme_new (); + gtk_icon_theme_add_resource_path (self->priv->icon_theme, + "/org/gnome/shell/icons"); + g_signal_connect (self->priv->icon_theme, "changed", + G_CALLBACK (on_gtk_icon_theme_changed), self); + + settings = st_settings_get (); + g_signal_connect (settings, "notify::gtk-icon-theme", + G_CALLBACK (on_icon_theme_changed), self); + + self->priv->keyed_cache = g_hash_table_new_full (g_str_hash, g_str_equal, + g_free, g_object_unref); + self->priv->keyed_surface_cache = g_hash_table_new_full (g_str_hash, + g_str_equal, + g_free, + (GDestroyNotify) cairo_surface_destroy); + self->priv->used_scales = g_hash_table_new_full (g_double_hash, g_double_equal, + g_free, NULL); + self->priv->outstanding_requests = g_hash_table_new_full (g_str_hash, g_str_equal, + g_free, NULL); + self->priv->file_monitors = g_hash_table_new_full (g_file_hash, (GEqualFunc) g_file_equal, + g_object_unref, g_object_unref); + + self->priv->cancellable = g_cancellable_new (); + + on_icon_theme_changed (settings, NULL, self); +} + +static void +st_texture_cache_dispose (GObject *object) +{ + StTextureCache *self = (StTextureCache*)object; + + g_cancellable_cancel (self->priv->cancellable); + + g_clear_object (&self->priv->settings); + g_clear_object (&self->priv->icon_theme); + g_clear_object (&self->priv->cancellable); + + g_clear_pointer (&self->priv->keyed_cache, g_hash_table_destroy); + g_clear_pointer (&self->priv->keyed_surface_cache, g_hash_table_destroy); + g_clear_pointer (&self->priv->used_scales, g_hash_table_destroy); + g_clear_pointer (&self->priv->outstanding_requests, g_hash_table_destroy); + g_clear_pointer (&self->priv->file_monitors, g_hash_table_destroy); + + G_OBJECT_CLASS (st_texture_cache_parent_class)->dispose (object); +} + +static void +st_texture_cache_finalize (GObject *object) +{ + G_OBJECT_CLASS (st_texture_cache_parent_class)->finalize (object); +} + +static void +compute_pixbuf_scale (gint width, + gint height, + gint available_width, + gint available_height, + gint *new_width, + gint *new_height) +{ + int scaled_width, scaled_height; + + if (width == 0 || height == 0) + { + *new_width = *new_height = 0; + return; + } + + if (available_width >= 0 && available_height >= 0) + { + /* This should keep the aspect ratio of the image intact, because if + * available_width < (available_height * width) / height + * then + * (available_width * height) / width < available_height + * So we are guaranteed to either scale the image to have an available_width + * for width and height scaled accordingly OR have the available_height + * for height and width scaled accordingly, whichever scaling results + * in the image that can fit both available dimensions. + */ + scaled_width = MIN (available_width, (available_height * width) / height); + scaled_height = MIN (available_height, (available_width * height) / width); + } + else if (available_width >= 0) + { + scaled_width = available_width; + scaled_height = (available_width * height) / width; + } + else if (available_height >= 0) + { + scaled_width = (available_height * width) / height; + scaled_height = available_height; + } + else + { + scaled_width = scaled_height = 0; + } + + /* Scale the image only if that will not increase its original dimensions. */ + if (scaled_width > 0 && scaled_height > 0 && scaled_width < width && scaled_height < height) + { + *new_width = scaled_width; + *new_height = scaled_height; + } + else + { + *new_width = width; + *new_height = height; + } +} + +static void +rgba_from_clutter (GdkRGBA *rgba, + ClutterColor *color) +{ + rgba->red = color->red / 255.; + rgba->green = color->green / 255.; + rgba->blue = color->blue / 255.; + rgba->alpha = color->alpha / 255.; +} + +/* A private structure for keeping width, height and scale. */ +typedef struct { + int width; + int height; + int scale; +} Dimensions; + +/* This struct corresponds to a request for an texture. + * It's creasted when something needs a new texture, + * and destroyed when the texture data is loaded. */ +typedef struct { + StTextureCache *cache; + StTextureCachePolicy policy; + char *key; + + guint width; + guint height; + guint paint_scale; + gfloat resource_scale; + GSList *actors; + + GtkIconInfo *icon_info; + StIconColors *colors; + GFile *file; +} AsyncTextureLoadData; + +static void +texture_load_data_free (gpointer p) +{ + AsyncTextureLoadData *data = p; + + if (data->icon_info) + { + g_object_unref (data->icon_info); + if (data->colors) + st_icon_colors_unref (data->colors); + } + else if (data->file) + g_object_unref (data->file); + + if (data->key) + g_free (data->key); + + if (data->actors) + g_slist_free_full (data->actors, (GDestroyNotify) g_object_unref); + + g_free (data); +} + +/** + * on_image_size_prepared: + * @pixbuf_loader: #GdkPixbufLoader loading the image + * @width: the original width of the image + * @height: the original height of the image + * @data: pointer to the #Dimensions structure containing available width and height for the image, + * available width or height can be -1 if the dimension is not limited + * + * Private function. + * + * Sets the size of the image being loaded to fit the available width and height dimensions, + * but never scales up the image beyond its actual size. + * Intended to be used as a callback for #GdkPixbufLoader "size-prepared" signal. + */ +static void +on_image_size_prepared (GdkPixbufLoader *pixbuf_loader, + gint width, + gint height, + gpointer data) +{ + Dimensions *available_dimensions = data; + int available_width = available_dimensions->width; + int available_height = available_dimensions->height; + int scale_factor = available_dimensions->scale; + int scaled_width; + int scaled_height; + + compute_pixbuf_scale (width, height, available_width, available_height, + &scaled_width, &scaled_height); + + gdk_pixbuf_loader_set_size (pixbuf_loader, + scaled_width * scale_factor, + scaled_height * scale_factor); +} + +static GdkPixbuf * +impl_load_pixbuf_data (const guchar *data, + gsize size, + int available_width, + int available_height, + int scale, + GError **error) +{ + GdkPixbufLoader *pixbuf_loader = NULL; + GdkPixbuf *rotated_pixbuf = NULL; + GdkPixbuf *pixbuf; + gboolean success; + Dimensions available_dimensions; + int width_before_rotation, width_after_rotation; + + pixbuf_loader = gdk_pixbuf_loader_new (); + + available_dimensions.width = available_width; + available_dimensions.height = available_height; + available_dimensions.scale = scale; + g_signal_connect (pixbuf_loader, "size-prepared", + G_CALLBACK (on_image_size_prepared), &available_dimensions); + + success = gdk_pixbuf_loader_write (pixbuf_loader, data, size, error); + if (!success) + goto out; + success = gdk_pixbuf_loader_close (pixbuf_loader, error); + if (!success) + goto out; + + pixbuf = gdk_pixbuf_loader_get_pixbuf (pixbuf_loader); + + width_before_rotation = gdk_pixbuf_get_width (pixbuf); + + rotated_pixbuf = gdk_pixbuf_apply_embedded_orientation (pixbuf); + width_after_rotation = gdk_pixbuf_get_width (rotated_pixbuf); + + /* There is currently no way to tell if the pixbuf will need to be rotated before it is loaded, + * so we only check that once it is loaded, and reload it again if it needs to be rotated in order + * to use the available width and height correctly. + * See http://bugzilla.gnome.org/show_bug.cgi?id=579003 + */ + if (width_before_rotation != width_after_rotation) + { + g_object_unref (pixbuf_loader); + g_object_unref (rotated_pixbuf); + rotated_pixbuf = NULL; + + pixbuf_loader = gdk_pixbuf_loader_new (); + + /* We know that the image will later be rotated, so we reverse the available dimensions. */ + available_dimensions.width = available_height; + available_dimensions.height = available_width; + available_dimensions.scale = scale; + g_signal_connect (pixbuf_loader, "size-prepared", + G_CALLBACK (on_image_size_prepared), &available_dimensions); + + success = gdk_pixbuf_loader_write (pixbuf_loader, data, size, error); + if (!success) + goto out; + + success = gdk_pixbuf_loader_close (pixbuf_loader, error); + if (!success) + goto out; + + pixbuf = gdk_pixbuf_loader_get_pixbuf (pixbuf_loader); + + rotated_pixbuf = gdk_pixbuf_apply_embedded_orientation (pixbuf); + } + +out: + if (pixbuf_loader) + g_object_unref (pixbuf_loader); + return rotated_pixbuf; +} + +static GdkPixbuf * +impl_load_pixbuf_file (GFile *file, + int available_width, + int available_height, + int paint_scale, + float resource_scale, + GError **error) +{ + GdkPixbuf *pixbuf = NULL; + char *contents = NULL; + gsize size; + + if (g_file_load_contents (file, NULL, &contents, &size, NULL, error)) + { + int scale = ceilf (paint_scale * resource_scale); + pixbuf = impl_load_pixbuf_data ((const guchar *) contents, size, + available_width, available_height, + scale, + error); + } + + g_free (contents); + + return pixbuf; +} + +static void +load_pixbuf_thread (GTask *result, + gpointer source, + gpointer task_data, + GCancellable *cancellable) +{ + GdkPixbuf *pixbuf; + AsyncTextureLoadData *data = task_data; + GError *error = NULL; + + g_assert (data != NULL); + g_assert (data->file != NULL); + + pixbuf = impl_load_pixbuf_file (data->file, data->width, data->height, + data->paint_scale, data->resource_scale, + &error); + + if (error != NULL) + g_task_return_error (result, error); + else if (pixbuf) + g_task_return_pointer (result, g_object_ref (pixbuf), g_object_unref); + + g_clear_object (&pixbuf); +} + +static GdkPixbuf * +load_pixbuf_async_finish (StTextureCache *cache, GAsyncResult *result, GError **error) +{ + return g_task_propagate_pointer (G_TASK (result), error); +} + +static ClutterContent * +pixbuf_to_st_content_image (GdkPixbuf *pixbuf, + int width, + int height, + int paint_scale, + float resource_scale) +{ + ClutterContent *image; + g_autoptr(GError) error = NULL; + + float native_width, native_height; + + native_width = ceilf (gdk_pixbuf_get_width (pixbuf) / resource_scale); + native_height = ceilf (gdk_pixbuf_get_height (pixbuf) / resource_scale); + + if (width < 0 && height < 0) + { + width = native_width; + height = native_height; + } + else if (width < 0) + { + height *= paint_scale; + width = native_width * (height / native_height); + } + else if (height < 0) + { + width *= paint_scale; + height = native_height * (width / native_width); + } + else + { + width *= paint_scale; + height *= paint_scale; + } + + image = st_image_content_new_with_preferred_size (width, height); + clutter_image_set_data (CLUTTER_IMAGE (image), + gdk_pixbuf_get_pixels (pixbuf), + gdk_pixbuf_get_has_alpha (pixbuf) ? + COGL_PIXEL_FORMAT_RGBA_8888 : COGL_PIXEL_FORMAT_RGB_888, + gdk_pixbuf_get_width (pixbuf), + gdk_pixbuf_get_height (pixbuf), + gdk_pixbuf_get_rowstride (pixbuf), + &error); + + if (error) + { + g_warning ("Failed to allocate texture: %s", error->message); + g_clear_object (&image); + } + + return image; +} + +static cairo_surface_t * +pixbuf_to_cairo_surface (GdkPixbuf *pixbuf) +{ + cairo_surface_t *dummy_surface; + cairo_pattern_t *pattern; + cairo_surface_t *surface; + cairo_t *cr; + + dummy_surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 1, 1); + + cr = cairo_create (dummy_surface); + gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0); + pattern = cairo_get_source (cr); + cairo_pattern_get_surface (pattern, &surface); + cairo_surface_reference (surface); + cairo_destroy (cr); + cairo_surface_destroy (dummy_surface); + + return surface; +} + +static void +finish_texture_load (AsyncTextureLoadData *data, + GdkPixbuf *pixbuf) +{ + g_autoptr(ClutterContent) image = NULL; + GSList *iter; + StTextureCache *cache; + + cache = data->cache; + + g_hash_table_remove (cache->priv->outstanding_requests, data->key); + + if (pixbuf == NULL) + goto out; + + if (data->policy != ST_TEXTURE_CACHE_POLICY_NONE) + { + gpointer orig_key = NULL, value = NULL; + + if (!g_hash_table_lookup_extended (cache->priv->keyed_cache, data->key, + &orig_key, &value)) + { + image = pixbuf_to_st_content_image (pixbuf, + data->width, data->height, + data->paint_scale, + data->resource_scale); + if (!image) + goto out; + + g_hash_table_insert (cache->priv->keyed_cache, g_strdup (data->key), + g_object_ref (image)); + } + else + { + image = g_object_ref (value); + } + } + else + { + image = pixbuf_to_st_content_image (pixbuf, + data->width, data->height, + data->paint_scale, + data->resource_scale); + if (!image) + goto out; + } + + for (iter = data->actors; iter; iter = iter->next) + { + ClutterActor *actor = iter->data; + set_content_from_image (actor, image); + } + +out: + texture_load_data_free (data); +} + +static void +on_symbolic_icon_loaded (GObject *source, + GAsyncResult *result, + gpointer user_data) +{ + GdkPixbuf *pixbuf; + pixbuf = gtk_icon_info_load_symbolic_finish (GTK_ICON_INFO (source), result, NULL, NULL); + finish_texture_load (user_data, pixbuf); + g_clear_object (&pixbuf); +} + +static void +on_icon_loaded (GObject *source, + GAsyncResult *result, + gpointer user_data) +{ + GdkPixbuf *pixbuf; + pixbuf = gtk_icon_info_load_icon_finish (GTK_ICON_INFO (source), result, NULL); + finish_texture_load (user_data, pixbuf); + g_clear_object (&pixbuf); +} + +static void +on_pixbuf_loaded (GObject *source, + GAsyncResult *result, + gpointer user_data) +{ + GdkPixbuf *pixbuf; + pixbuf = load_pixbuf_async_finish (ST_TEXTURE_CACHE (source), result, NULL); + finish_texture_load (user_data, pixbuf); + g_clear_object (&pixbuf); +} + +static void +load_texture_async (StTextureCache *cache, + AsyncTextureLoadData *data) +{ + if (data->file) + { + GTask *task = g_task_new (cache, NULL, on_pixbuf_loaded, data); + g_task_set_task_data (task, data, NULL); + g_task_run_in_thread (task, load_pixbuf_thread); + g_object_unref (task); + } + else if (data->icon_info) + { + StIconColors *colors = data->colors; + if (colors) + { + GdkRGBA foreground_color; + GdkRGBA success_color; + GdkRGBA warning_color; + GdkRGBA error_color; + + rgba_from_clutter (&foreground_color, &colors->foreground); + rgba_from_clutter (&success_color, &colors->success); + rgba_from_clutter (&warning_color, &colors->warning); + rgba_from_clutter (&error_color, &colors->error); + + gtk_icon_info_load_symbolic_async (data->icon_info, + &foreground_color, &success_color, + &warning_color, &error_color, + cache->priv->cancellable, + on_symbolic_icon_loaded, data); + } + else + { + gtk_icon_info_load_icon_async (data->icon_info, + cache->priv->cancellable, + on_icon_loaded, data); + } + } + else + g_assert_not_reached (); +} + +typedef struct { + StTextureCache *cache; + ClutterContent *image; + GObject *source; + gulong notify_signal_id; + gboolean weakref_active; +} StTextureCachePropertyBind; + +static void +st_texture_cache_load_surface (ClutterContent **image, + cairo_surface_t *surface) +{ + g_return_if_fail (image != NULL); + + if (surface != NULL && + cairo_surface_get_type (surface) == CAIRO_SURFACE_TYPE_IMAGE && + (cairo_image_surface_get_format (surface) == CAIRO_FORMAT_ARGB32 || + cairo_image_surface_get_format (surface) == CAIRO_FORMAT_RGB24)) + { + g_autoptr(GError) error = NULL; + int width, height, size; + + width = cairo_image_surface_get_width (surface); + height = cairo_image_surface_get_width (surface); + size = MAX(width, height); + + if (*image == NULL) + *image = st_image_content_new_with_preferred_size (size, size); + + clutter_image_set_data (CLUTTER_IMAGE (*image), + cairo_image_surface_get_data (surface), + cairo_image_surface_get_format (surface) == CAIRO_FORMAT_ARGB32 ? + COGL_PIXEL_FORMAT_BGRA_8888 : COGL_PIXEL_FORMAT_BGR_888, + width, + height, + cairo_image_surface_get_stride (surface), + &error); + + if (error) + g_warning ("Failed to allocate texture: %s", error->message); + } + else if (*image == NULL) + { + *image = st_image_content_new_with_preferred_size (0, 0); + } +} + +static void +st_texture_cache_reset_texture (StTextureCachePropertyBind *bind, + const char *propname) +{ + cairo_surface_t *surface; + + g_object_get (bind->source, propname, &surface, NULL); + + st_texture_cache_load_surface (&bind->image, surface); +} + +static void +st_texture_cache_on_pixbuf_notify (GObject *object, + GParamSpec *paramspec, + gpointer data) +{ + StTextureCachePropertyBind *bind = data; + st_texture_cache_reset_texture (bind, paramspec->name); +} + +static void +st_texture_cache_bind_weak_notify (gpointer data, + GObject *source_location) +{ + StTextureCachePropertyBind *bind = data; + bind->weakref_active = FALSE; + g_signal_handler_disconnect (bind->source, bind->notify_signal_id); +} + +static void +st_texture_cache_free_bind (gpointer data) +{ + StTextureCachePropertyBind *bind = data; + if (bind->weakref_active) + g_object_weak_unref (G_OBJECT (bind->image), st_texture_cache_bind_weak_notify, bind); + g_free (bind); +} + +/** + * st_texture_cache_bind_cairo_surface_property: + * @cache: A #StTextureCache + * @object: A #GObject with a property @property_name of type #cairo_surface_t + * @property_name: Name of a property + * + * Create a #GIcon which tracks the #cairo_surface_t value of a GObject property + * named by @property_name. Unlike other methods in StTextureCache, the underlying + * #CoglTexture is not shared by default with other invocations to this method. + * + * If the source object is destroyed, the texture will continue to show the last + * value of the property. + * + * Returns: (transfer full): A new #GIcon + */ +GIcon * +st_texture_cache_bind_cairo_surface_property (StTextureCache *cache, + GObject *object, + const char *property_name) +{ + gchar *notify_key; + StTextureCachePropertyBind *bind; + + bind = g_new0 (StTextureCachePropertyBind, 1); + bind->cache = cache; + bind->source = object; + + st_texture_cache_reset_texture (bind, property_name); + + g_object_weak_ref (G_OBJECT (bind->image), st_texture_cache_bind_weak_notify, bind); + bind->weakref_active = TRUE; + + notify_key = g_strdup_printf ("notify::%s", property_name); + bind->notify_signal_id = g_signal_connect_data (object, notify_key, G_CALLBACK(st_texture_cache_on_pixbuf_notify), + bind, (GClosureNotify)st_texture_cache_free_bind, 0); + g_free (notify_key); + + return G_ICON (bind->image); +} + +/** + * st_texture_cache_load_cairo_surface_to_gicon: + * @cache: A #StTextureCache + * @surface: A #cairo_surface_t + * + * Create a #GIcon from @surface. + * + * Returns: (transfer full): A new #GIcon + */ +GIcon * +st_texture_cache_load_cairo_surface_to_gicon (StTextureCache *cache, + cairo_surface_t *surface) +{ + ClutterContent *image = NULL; + st_texture_cache_load_surface (&image, surface); + + return G_ICON (image); +} + +/** + * st_texture_cache_load: (skip) + * @cache: A #StTextureCache + * @key: Arbitrary string used to refer to item + * @policy: Caching policy + * @load: Function to create the texture, if not already cached + * @data: User data passed to @load + * @error: A #GError + * + * Load an arbitrary texture, caching it. The string chosen for @key + * should be of the form "type-prefix:type-uuid". For example, + * "url:file:///usr/share/icons/hicolor/48x48/apps/firefox.png", or + * "stock-icon:gtk-ok". + * + * Returns: (transfer full): A newly-referenced handle to the texture + */ +CoglTexture * +st_texture_cache_load (StTextureCache *cache, + const char *key, + StTextureCachePolicy policy, + StTextureCacheLoader load, + void *data, + GError **error) +{ + CoglTexture *texture; + + texture = g_hash_table_lookup (cache->priv->keyed_cache, key); + if (!texture) + { + texture = load (cache, key, data, error); + if (texture && policy == ST_TEXTURE_CACHE_POLICY_FOREVER) + g_hash_table_insert (cache->priv->keyed_cache, g_strdup (key), texture); + } + + if (texture && policy == ST_TEXTURE_CACHE_POLICY_FOREVER) + cogl_object_ref (texture); + + return texture; +} + +/** + * ensure_request: + * @cache: A #StTextureCache + * @key: A cache key + * @policy: Cache policy + * @request: (out): If no request is outstanding, one will be created and returned here + * @texture: A texture to be added to the request + * + * Check for any outstanding load for the data represented by @key. If there + * is already a request pending, append it to that request to avoid loading + * the data multiple times. + * + * Returns: %TRUE if there is already a request pending + */ +static gboolean +ensure_request (StTextureCache *cache, + const char *key, + StTextureCachePolicy policy, + AsyncTextureLoadData **request, + ClutterActor *actor) +{ + ClutterContent *image; + AsyncTextureLoadData *pending; + gboolean had_pending; + + image = g_hash_table_lookup (cache->priv->keyed_cache, key); + + if (image != NULL) + { + /* We had this cached already, just set the texture and we're done. */ + set_content_from_image (actor, image); + return TRUE; + } + + pending = g_hash_table_lookup (cache->priv->outstanding_requests, key); + had_pending = pending != NULL; + + if (pending == NULL) + { + /* Not cached and no pending request, create it */ + *request = g_new0 (AsyncTextureLoadData, 1); + if (policy != ST_TEXTURE_CACHE_POLICY_NONE) + g_hash_table_insert (cache->priv->outstanding_requests, g_strdup (key), *request); + } + else + *request = pending; + + /* Regardless of whether there was a pending request, prepend our texture here. */ + (*request)->actors = g_slist_prepend ((*request)->actors, g_object_ref (actor)); + + return had_pending; +} + +/** + * st_texture_cache_load_gicon: + * @cache: A #StTextureCache + * @theme_node: (nullable): The #StThemeNode to use for colors, or %NULL + * if the icon must not be recolored + * @icon: the #GIcon to load + * @size: Size of themed + * @paint_scale: Scale factor of display + * @resource_scale: Resource scale factor + * + * This method returns a new #ClutterActor for a given #GIcon. If the + * icon isn't loaded already, the texture will be filled + * asynchronously. + * + * Returns: (transfer none) (nullable): A new #ClutterActor for the icon, or %NULL if not found + */ +ClutterActor * +st_texture_cache_load_gicon (StTextureCache *cache, + StThemeNode *theme_node, + GIcon *icon, + gint size, + gint paint_scale, + gfloat resource_scale) +{ + AsyncTextureLoadData *request; + ClutterActor *actor; + gint scale; + char *gicon_string; + g_autofree char *key = NULL; + float actor_size; + GtkIconTheme *theme; + StTextureCachePolicy policy; + StIconColors *colors = NULL; + StIconStyle icon_style = ST_ICON_STYLE_REQUESTED; + GtkIconLookupFlags lookup_flags; + + actor_size = size * paint_scale; + + if (ST_IS_IMAGE_CONTENT (icon)) + { + int width, height; + + g_object_get (G_OBJECT (icon), + "preferred-width", &width, + "preferred-height", &height, + NULL); + if (width == 0 && height == 0) + return NULL; + + return g_object_new (CLUTTER_TYPE_ACTOR, + "content-gravity", CLUTTER_CONTENT_GRAVITY_RESIZE_ASPECT, + "width", actor_size, + "height", actor_size, + "content", CLUTTER_CONTENT (icon), + NULL); + } + + if (theme_node) + { + colors = st_theme_node_get_icon_colors (theme_node); + icon_style = st_theme_node_get_icon_style (theme_node); + } + + /* Do theme lookups in the main thread to avoid thread-unsafety */ + theme = cache->priv->icon_theme; + + lookup_flags = GTK_ICON_LOOKUP_USE_BUILTIN; + + if (icon_style == ST_ICON_STYLE_REGULAR) + lookup_flags |= GTK_ICON_LOOKUP_FORCE_REGULAR; + else if (icon_style == ST_ICON_STYLE_SYMBOLIC) + lookup_flags |= GTK_ICON_LOOKUP_FORCE_SYMBOLIC; + + if (clutter_get_default_text_direction () == CLUTTER_TEXT_DIRECTION_RTL) + lookup_flags |= GTK_ICON_LOOKUP_DIR_RTL; + else + lookup_flags |= GTK_ICON_LOOKUP_DIR_LTR; + + scale = ceilf (paint_scale * resource_scale); + + gicon_string = g_icon_to_string (icon); + /* A return value of NULL indicates that the icon can not be serialized, + * so don't have a unique identifier for it as a cache key, and thus can't + * be cached. If it is cacheable, we hardcode a policy of FOREVER here for + * now; we should actually blow this away on icon theme changes probably */ + policy = gicon_string != NULL ? ST_TEXTURE_CACHE_POLICY_FOREVER + : ST_TEXTURE_CACHE_POLICY_NONE; + if (colors) + { + /* This raises some doubts about the practice of using string keys */ + key = g_strdup_printf (CACHE_PREFIX_ICON "%s,size=%d,scale=%d,style=%d,colors=%2x%2x%2x%2x,%2x%2x%2x%2x,%2x%2x%2x%2x,%2x%2x%2x%2x", + gicon_string, size, scale, icon_style, + colors->foreground.red, colors->foreground.blue, colors->foreground.green, colors->foreground.alpha, + colors->warning.red, colors->warning.blue, colors->warning.green, colors->warning.alpha, + colors->error.red, colors->error.blue, colors->error.green, colors->error.alpha, + colors->success.red, colors->success.blue, colors->success.green, colors->success.alpha); + } + else + { + key = g_strdup_printf (CACHE_PREFIX_ICON "%s,size=%d,scale=%d,style=%d", + gicon_string, size, scale, icon_style); + } + g_free (gicon_string); + + actor = create_invisible_actor (); + clutter_actor_set_content_gravity (actor, CLUTTER_CONTENT_GRAVITY_RESIZE_ASPECT); + clutter_actor_set_size (actor, actor_size, actor_size); + if (!ensure_request (cache, key, policy, &request, actor)) + { + /* Else, make a new request */ + GtkIconInfo *info; + + info = gtk_icon_theme_lookup_by_gicon_for_scale (theme, icon, + size, scale, + lookup_flags); + if (info == NULL) + { + g_hash_table_remove (cache->priv->outstanding_requests, key); + texture_load_data_free (request); + g_object_unref (actor); + return NULL; + } + + request->cache = cache; + /* Transfer ownership of key */ + request->key = g_steal_pointer (&key); + request->policy = policy; + request->colors = colors ? st_icon_colors_ref (colors) : NULL; + request->icon_info = info; + request->width = request->height = size; + request->paint_scale = paint_scale; + request->resource_scale = resource_scale; + + load_texture_async (cache, request); + } + + return actor; +} + +static ClutterActor * +load_from_pixbuf (GdkPixbuf *pixbuf, + int paint_scale, + float resource_scale) +{ + g_autoptr(ClutterContent) image = NULL; + ClutterActor *actor; + + image = pixbuf_to_st_content_image (pixbuf, -1, -1, paint_scale, resource_scale); + + actor = g_object_new (CLUTTER_TYPE_ACTOR, + "request-mode", CLUTTER_REQUEST_CONTENT_SIZE, + NULL); + clutter_actor_set_content (actor, image); + + return actor; +} + +static void +hash_table_remove_with_scales (GHashTable *hash, + GList *scales, + const char *base_key) +{ + GList *l; + + for (l = scales; l; l = l->next) + { + double scale = *((double *)l->data); + g_autofree char *key = NULL; + key = g_strdup_printf ("%s%f", base_key, scale); + g_hash_table_remove (hash, key); + } +} + +static void +hash_table_insert_scale (GHashTable *hash, + double scale) +{ + double *saved_scale; + + if (g_hash_table_contains (hash, &scale)) + return; + + saved_scale = g_new (double, 1); + *saved_scale = scale; + + g_hash_table_add (hash, saved_scale); +} + +static void +file_changed_cb (GFileMonitor *monitor, + GFile *file, + GFile *other, + GFileMonitorEvent event_type, + gpointer user_data) +{ + StTextureCache *cache = user_data; + char *key; + guint file_hash; + g_autoptr (GList) scales = NULL; + + if (event_type != G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT) + return; + + file_hash = g_file_hash (file); + scales = g_hash_table_get_keys (cache->priv->used_scales); + + key = g_strdup_printf (CACHE_PREFIX_FILE "%u", file_hash); + g_hash_table_remove (cache->priv->keyed_cache, key); + hash_table_remove_with_scales (cache->priv->keyed_cache, scales, key); + g_free (key); + + key = g_strdup_printf (CACHE_PREFIX_FILE_FOR_CAIRO "%u", file_hash); + g_hash_table_remove (cache->priv->keyed_surface_cache, key); + hash_table_remove_with_scales (cache->priv->keyed_surface_cache, scales, key); + g_free (key); + + g_signal_emit (cache, signals[TEXTURE_FILE_CHANGED], 0, file); +} + +static void +ensure_monitor_for_file (StTextureCache *cache, + GFile *file) +{ + StTextureCachePrivate *priv = cache->priv; + + /* No point in trying to monitor files that are part of a + * GResource, since it does not support file monitoring. + */ + if (g_file_has_uri_scheme (file, "resource")) + return; + + if (g_hash_table_lookup (priv->file_monitors, file) == NULL) + { + GFileMonitor *monitor = g_file_monitor_file (file, G_FILE_MONITOR_NONE, + NULL, NULL); + g_signal_connect (monitor, "changed", + G_CALLBACK (file_changed_cb), cache); + g_hash_table_insert (priv->file_monitors, g_object_ref (file), monitor); + } +} + +typedef struct { + GFile *gfile; + gint grid_width, grid_height; + gint paint_scale; + gfloat resource_scale; + ClutterActor *actor; + GCancellable *cancellable; + GFunc load_callback; + gpointer load_callback_data; +} AsyncImageData; + +static void +on_data_destroy (gpointer data) +{ + AsyncImageData *d = (AsyncImageData *)data; + g_object_unref (d->gfile); + g_object_unref (d->actor); + g_object_unref (d->cancellable); + g_free (d); +} + +static void +on_sliced_image_actor_destroyed (ClutterActor *actor, + gpointer data) +{ + GTask *task = data; + GCancellable *cancellable = g_task_get_cancellable (task); + + g_cancellable_cancel (cancellable); +} + +static void +on_sliced_image_loaded (GObject *source_object, + GAsyncResult *res, + gpointer user_data) +{ + GObject *cache = source_object; + AsyncImageData *data = (AsyncImageData *)user_data; + GTask *task = G_TASK (res); + GList *list, *pixbufs; + + if (g_task_had_error (task) || g_cancellable_is_cancelled (data->cancellable)) + return; + + pixbufs = g_task_propagate_pointer (task, NULL); + + for (list = pixbufs; list; list = list->next) + { + ClutterActor *actor = load_from_pixbuf (GDK_PIXBUF (list->data), + data->paint_scale, + data->resource_scale); + clutter_actor_hide (actor); + clutter_actor_add_child (data->actor, actor); + } + + g_list_free_full (pixbufs, g_object_unref); + + g_signal_handlers_disconnect_by_func (data->actor, + on_sliced_image_actor_destroyed, + task); + + if (data->load_callback != NULL) + data->load_callback (cache, data->load_callback_data); +} + +static void +free_glist_unref_gobjects (gpointer p) +{ + g_list_free_full (p, g_object_unref); +} + +static void +on_loader_size_prepared (GdkPixbufLoader *loader, + gint width, + gint height, + gpointer user_data) +{ + AsyncImageData *data = user_data; + int scale = ceilf (data->paint_scale * data->resource_scale); + + gdk_pixbuf_loader_set_size (loader, width * scale, height * scale); +} + +static void +load_sliced_image (GTask *result, + gpointer object, + gpointer task_data, + GCancellable *cancellable) +{ + AsyncImageData *data; + GList *res = NULL; + GdkPixbuf *pix; + gint width, height, y, x; + gint scale_factor; + GdkPixbufLoader *loader; + GError *error = NULL; + gchar *buffer = NULL; + gsize length; + + g_assert (cancellable); + + data = task_data; + g_assert (data); + + loader = gdk_pixbuf_loader_new (); + g_signal_connect (loader, "size-prepared", G_CALLBACK (on_loader_size_prepared), data); + + if (!g_file_load_contents (data->gfile, cancellable, &buffer, &length, NULL, &error)) + { + g_warning ("Failed to open sliced image: %s", error->message); + goto out; + } + + if (!gdk_pixbuf_loader_write (loader, (const guchar *) buffer, length, &error)) + { + g_warning ("Failed to load image: %s", error->message); + goto out; + } + + if (!gdk_pixbuf_loader_close (loader, NULL)) + goto out; + + pix = gdk_pixbuf_loader_get_pixbuf (loader); + width = gdk_pixbuf_get_width (pix); + height = gdk_pixbuf_get_height (pix); + scale_factor = ceilf (data->paint_scale * data->resource_scale); + for (y = 0; y < height; y += data->grid_height * scale_factor) + { + for (x = 0; x < width; x += data->grid_width * scale_factor) + { + GdkPixbuf *pixbuf = gdk_pixbuf_new_subpixbuf (pix, x, y, + data->grid_width * scale_factor, + data->grid_height * scale_factor); + g_assert (pixbuf != NULL); + res = g_list_append (res, pixbuf); + } + } + + out: + /* We don't need the original pixbuf anymore, which is owned by the loader, + * though the subpixbufs will hold a reference. */ + g_object_unref (loader); + g_free (buffer); + g_clear_pointer (&error, g_error_free); + g_task_return_pointer (result, res, free_glist_unref_gobjects); +} + +/** + * st_texture_cache_load_sliced_image: + * @cache: A #StTextureCache + * @file: A #GFile + * @grid_width: Width in pixels + * @grid_height: Height in pixels + * @paint_scale: Scale factor of the display + * @load_callback: (scope async) (nullable): Function called when the image is loaded, or %NULL + * @user_data: Data to pass to the load callback + * + * This function reads a single image file which contains multiple images internally. + * The image file will be divided using @grid_width and @grid_height; + * note that the dimensions of the image loaded from @path + * should be a multiple of the specified grid dimensions. + * + * Returns: (transfer none): A new #ClutterActor + */ +ClutterActor * +st_texture_cache_load_sliced_image (StTextureCache *cache, + GFile *file, + gint grid_width, + gint grid_height, + gint paint_scale, + gfloat resource_scale, + GFunc load_callback, + gpointer user_data) +{ + AsyncImageData *data; + GTask *result; + ClutterActor *actor = clutter_actor_new (); + GCancellable *cancellable = g_cancellable_new (); + + g_return_val_if_fail (G_IS_FILE (file), NULL); + g_assert (paint_scale > 0); + g_assert (resource_scale > 0); + + data = g_new0 (AsyncImageData, 1); + data->grid_width = grid_width; + data->grid_height = grid_height; + data->paint_scale = paint_scale; + data->resource_scale = resource_scale; + data->gfile = g_object_ref (file); + data->actor = actor; + data->cancellable = cancellable; + data->load_callback = load_callback; + data->load_callback_data = user_data; + g_object_ref (G_OBJECT (actor)); + + result = g_task_new (cache, cancellable, on_sliced_image_loaded, data); + + g_signal_connect (actor, "destroy", + G_CALLBACK (on_sliced_image_actor_destroyed), result); + + g_task_set_task_data (result, data, on_data_destroy); + g_task_run_in_thread (result, load_sliced_image); + + g_object_unref (result); + + return actor; +} + +/** + * st_texture_cache_load_file_async: + * @cache: A #StTextureCache + * @file: a #GFile of the image file from which to create a pixbuf + * @available_width: available width for the image, can be -1 if not limited + * @available_height: available height for the image, can be -1 if not limited + * @paint_scale: scale factor of the display + * @resource_scale: Resource scale factor + * + * Asynchronously load an image. Initially, the returned texture will have a natural + * size of zero. At some later point, either the image will be loaded successfully + * and at that point size will be negotiated, or upon an error, no image will be set. + * + * Returns: (transfer none): A new #ClutterActor with no image loaded initially. + */ +ClutterActor * +st_texture_cache_load_file_async (StTextureCache *cache, + GFile *file, + int available_width, + int available_height, + int paint_scale, + gfloat resource_scale) +{ + ClutterActor *actor; + AsyncTextureLoadData *request; + StTextureCachePolicy policy; + gchar *key; + int scale; + + scale = ceilf (paint_scale * resource_scale); + key = g_strdup_printf (CACHE_PREFIX_FILE "%u%d", g_file_hash (file), scale); + + policy = ST_TEXTURE_CACHE_POLICY_NONE; /* XXX */ + + actor = create_invisible_actor (); + + if (ensure_request (cache, key, policy, &request, actor)) + { + /* If there's an outstanding request, we've just added ourselves to it */ + g_free (key); + } + else + { + /* Else, make a new request */ + + request->cache = cache; + /* Transfer ownership of key */ + request->key = key; + request->file = g_object_ref (file); + request->policy = policy; + request->width = available_width; + request->height = available_height; + request->paint_scale = paint_scale; + request->resource_scale = resource_scale; + + load_texture_async (cache, request); + } + + ensure_monitor_for_file (cache, file); + + return actor; +} + +static CoglTexture * +st_texture_cache_load_file_sync_to_cogl_texture (StTextureCache *cache, + StTextureCachePolicy policy, + GFile *file, + int available_width, + int available_height, + int paint_scale, + gfloat resource_scale, + GError **error) +{ + ClutterContent *image; + CoglTexture *texdata; + GdkPixbuf *pixbuf; + char *key; + + key = g_strdup_printf (CACHE_PREFIX_FILE "%u%f", g_file_hash (file), resource_scale); + + texdata = NULL; + image = g_hash_table_lookup (cache->priv->keyed_cache, key); + + if (image == NULL) + { + pixbuf = impl_load_pixbuf_file (file, available_width, available_height, + paint_scale, resource_scale, error); + if (!pixbuf) + goto out; + + image = pixbuf_to_st_content_image (pixbuf, + available_height, available_width, + paint_scale, resource_scale); + g_object_unref (pixbuf); + + if (!image) + goto out; + + if (policy == ST_TEXTURE_CACHE_POLICY_FOREVER) + { + g_hash_table_insert (cache->priv->keyed_cache, g_strdup (key), image); + hash_table_insert_scale (cache->priv->used_scales, (double)resource_scale); + } + } + + /* Because the texture is loaded synchronously, we won't call + * clutter_image_set_data(), so it's safe to use the texture + * of ClutterImage here. */ + texdata = clutter_image_get_texture (CLUTTER_IMAGE (image)); + cogl_object_ref (texdata); + + ensure_monitor_for_file (cache, file); + +out: + g_free (key); + return texdata; +} + +static cairo_surface_t * +st_texture_cache_load_file_sync_to_cairo_surface (StTextureCache *cache, + StTextureCachePolicy policy, + GFile *file, + int available_width, + int available_height, + int paint_scale, + gfloat resource_scale, + GError **error) +{ + cairo_surface_t *surface; + GdkPixbuf *pixbuf; + char *key; + + key = g_strdup_printf (CACHE_PREFIX_FILE_FOR_CAIRO "%u%f", g_file_hash (file), resource_scale); + + surface = g_hash_table_lookup (cache->priv->keyed_surface_cache, key); + + if (surface == NULL) + { + pixbuf = impl_load_pixbuf_file (file, available_width, available_height, + paint_scale, resource_scale, error); + if (!pixbuf) + goto out; + + surface = pixbuf_to_cairo_surface (pixbuf); + g_object_unref (pixbuf); + + if (policy == ST_TEXTURE_CACHE_POLICY_FOREVER) + { + cairo_surface_reference (surface); + g_hash_table_insert (cache->priv->keyed_surface_cache, + g_strdup (key), surface); + hash_table_insert_scale (cache->priv->used_scales, (double)resource_scale); + } + } + else + cairo_surface_reference (surface); + + ensure_monitor_for_file (cache, file); + +out: + g_free (key); + return surface; +} + +/** + * st_texture_cache_load_file_to_cogl_texture: (skip) + * @cache: A #StTextureCache + * @file: A #GFile in supported image format + * @paint_scale: Scale factor of the display + * @resource_scale: Resource scale factor + * + * This function synchronously loads the given file path + * into a COGL texture. On error, a warning is emitted + * and %NULL is returned. + * + * Returns: (transfer full): a new #CoglTexture + */ +CoglTexture * +st_texture_cache_load_file_to_cogl_texture (StTextureCache *cache, + GFile *file, + gint paint_scale, + gfloat resource_scale) +{ + CoglTexture *texture; + GError *error = NULL; + + texture = st_texture_cache_load_file_sync_to_cogl_texture (cache, ST_TEXTURE_CACHE_POLICY_FOREVER, + file, -1, -1, paint_scale, resource_scale, + &error); + + if (texture == NULL) + { + char *uri = g_file_get_uri (file); + g_warning ("Failed to load %s: %s", uri, error->message); + g_clear_error (&error); + g_free (uri); + } + + return texture; +} + +/** + * st_texture_cache_load_file_to_cairo_surface: + * @cache: A #StTextureCache + * @file: A #GFile in supported image format + * @paint_scale: Scale factor of the display + * @resource_scale: Resource scale factor + * + * This function synchronously loads the given file path + * into a cairo surface. On error, a warning is emitted + * and %NULL is returned. + * + * Returns: (transfer full): a new #cairo_surface_t + */ +cairo_surface_t * +st_texture_cache_load_file_to_cairo_surface (StTextureCache *cache, + GFile *file, + gint paint_scale, + gfloat resource_scale) +{ + cairo_surface_t *surface; + GError *error = NULL; + + surface = st_texture_cache_load_file_sync_to_cairo_surface (cache, ST_TEXTURE_CACHE_POLICY_FOREVER, + file, -1, -1, paint_scale, resource_scale, + &error); + + if (surface == NULL) + { + char *uri = g_file_get_uri (file); + g_warning ("Failed to load %s: %s", uri, error->message); + g_clear_error (&error); + g_free (uri); + } + + return surface; +} + +static StTextureCache *instance = NULL; + +/** + * st_texture_cache_get_default: + * + * Returns: (transfer none): The global texture cache + */ +StTextureCache* +st_texture_cache_get_default (void) +{ + if (instance == NULL) + instance = g_object_new (ST_TYPE_TEXTURE_CACHE, NULL); + return instance; +} + +/** + * st_texture_cache_rescan_icon_theme: + * + * Rescan the current icon theme, if necessary. + * + * Returns: %TRUE if the icon theme has changed and needed to be reloaded. + */ +gboolean +st_texture_cache_rescan_icon_theme (StTextureCache *cache) +{ + StTextureCachePrivate *priv = cache->priv; + + return gtk_icon_theme_rescan_if_needed (priv->icon_theme); +} |