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GtkPixelCache: Free cache if not used in 20 seconds

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No need to keep a performance enhancing cache around if its not
actually in use.
This commit is contained in:
Alexander Larsson 2013-05-07 14:27:17 +02:00
parent e90fab2b83
commit 8ae7defad5
1 changed files with 33 additions and 0 deletions
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33
gtk/gtkpixelcache.c
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@ -20,6 +20,8 @@
#include "gtkdebug.h"
#include "gtkpixelcacheprivate.h"
#define BLOW_CACHE_TIMEOUT_SEC 20
/* The extra size of the offscreen surface we allocate
to make scrolling more efficient */
#define EXTRA_SIZE 64
@ -39,6 +41,8 @@ struct _GtkPixelCache {
/* may be null if not dirty */
cairo_region_t *surface_dirty;
guint timeout_tag;
};
GtkPixelCache *
@ -57,6 +61,9 @@ _gtk_pixel_cache_free (GtkPixelCache *cache)
if (cache == NULL)
return;
if (cache->timeout_tag)
g_source_remove (cache->timeout_tag);
if (cache->surface != NULL)
cairo_surface_destroy (cache->surface);
@ -322,6 +329,26 @@ _gtk_pixel_cache_repaint (GtkPixelCache *cache,
}
}
static gboolean
blow_cache_cb (gpointer user_data)
{
GtkPixelCache *cache = user_data;
cache->timeout_tag = 0;
if (cache->surface)
{
cairo_surface_destroy (cache->surface);
cache->surface = NULL;
if (cache->surface_dirty)
cairo_region_destroy (cache->surface_dirty);
cache->surface_dirty = NULL;
}
return G_SOURCE_REMOVE;
}
void
_gtk_pixel_cache_draw (GtkPixelCache *cache,
cairo_t *cr,
@ -333,6 +360,12 @@ _gtk_pixel_cache_draw (GtkPixelCache *cache,
GtkPixelCacheDrawFunc draw,
gpointer user_data)
{
if (cache->timeout_tag)
g_source_remove (cache->timeout_tag);
cache->timeout_tag = g_timeout_add_seconds (BLOW_CACHE_TIMEOUT_SEC,
blow_cache_cb, cache);
_gtk_pixel_cache_create_surface_if_needed (cache, window,
view_rect, canvas_rect);
_gtk_pixel_cache_set_position (cache, view_rect, canvas_rect);