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icontheme: Add LRU cache back

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Add a cache of icon infos that we keep around a little longer, to avoid
loading icons from disk that only exist for a short amount of time (e.g.
during one frame of a cell renderer snapshot).

We make sure recently used items are kept alive by just adding them to
the cache on lookup.
This commit is contained in:
Timm Bäder 2019-09-01 13:25:44 +02:00
parent 32bed34935
commit 53132d0235
1 changed files with 46 additions and 7 deletions
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53
gtk/gtkicontheme.c
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@ -130,6 +130,9 @@ typedef enum
#define DEBUG_CACHE(args)
#endif
#define LRU_CACHE_SIZE 100
#define MAX_LRU_TEXTURE_SIZE 128
typedef struct _GtkIconInfoClass GtkIconInfoClass;
typedef struct _GtkIconThemeClass GtkIconThemeClass;
typedef struct _GtkIconThemePrivate GtkIconThemePrivate;
@ -157,6 +160,9 @@ struct _GtkIconThemePrivate
{
GHashTable *info_cache;
GtkIconInfo *lru_cache[LRU_CACHE_SIZE];
int lru_cache_next;
gchar *current_theme;
gchar **search_path;
gint search_path_len;
@ -392,6 +398,34 @@ icon_info_key_equal (gconstpointer _a,
G_DEFINE_TYPE_WITH_PRIVATE (GtkIconTheme, gtk_icon_theme, G_TYPE_OBJECT)
static void
add_to_lru_cache (GtkIconInfo *info)
{
GtkIconTheme *theme = info->in_cache;
GtkIconThemePrivate *priv = gtk_icon_theme_get_instance_private (theme);
if (!theme)
return;
if (info->texture &&
info->texture->width <= MAX_LRU_TEXTURE_SIZE &&
info->texture->height <= MAX_LRU_TEXTURE_SIZE)
{
g_set_object (&priv->lru_cache[priv->lru_cache_next], info);
priv->lru_cache_next = (priv->lru_cache_next + 1) % LRU_CACHE_SIZE;
}
}
static void
clear_lru_cache (GtkIconTheme *icon_theme)
{
GtkIconThemePrivate *priv = gtk_icon_theme_get_instance_private (icon_theme);
int i;
for (i = 0; i < LRU_CACHE_SIZE; i ++)
g_clear_object (&priv->lru_cache[i]);
}
/**
* gtk_icon_theme_new:
*
@ -762,6 +796,7 @@ do_theme_change (GtkIconTheme *icon_theme)
GtkIconThemePrivate *priv = icon_theme->priv;
g_hash_table_remove_all (priv->info_cache);
clear_lru_cache (icon_theme);
if (!priv->themes_valid)
return;
@ -794,13 +829,10 @@ blow_themes (GtkIconTheme *icon_theme)
static void
gtk_icon_theme_finalize (GObject *object)
{
GtkIconTheme *icon_theme;
GtkIconThemePrivate *priv;
GtkIconTheme *icon_theme = GTK_ICON_THEME (object);
GtkIconThemePrivate *priv = gtk_icon_theme_get_instance_private (icon_theme);
int i;
icon_theme = GTK_ICON_THEME (object);
priv = icon_theme->priv;
g_hash_table_destroy (priv->info_cache);
if (priv->theme_changed_idle)
@ -817,8 +849,9 @@ gtk_icon_theme_finalize (GObject *object)
g_list_free_full (priv->resource_paths, g_free);
blow_themes (icon_theme);
clear_lru_cache (icon_theme);
G_OBJECT_CLASS (gtk_icon_theme_parent_class)->finalize (object);
G_OBJECT_CLASS (gtk_icon_theme_parent_class)->finalize (object);
}
/**
@ -1421,9 +1454,10 @@ ensure_valid_themes (GtkIconTheme *icon_theme)
{
g_hash_table_remove_all (priv->info_cache);
blow_themes (icon_theme);
clear_lru_cache (icon_theme);
}
}
if (!priv->themes_valid)
{
load_themes (icon_theme);
@ -1600,6 +1634,9 @@ real_choose_icon (GtkIconTheme *icon_theme,
icon_info = g_object_ref (icon_info);
/* Move item to front in LRU cache */
add_to_lru_cache (icon_info);
return icon_info;
}
@ -3641,6 +3678,8 @@ icon_info_ensure_scale_and_texture (GtkIconInfo *icon_info)
}
g_assert (icon_info->texture != NULL);
add_to_lru_cache (icon_info);
return TRUE;
}