/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
   Copyright (C) 2009-2015 Red Hat, Inc.

   This library 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 library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef IMAGE_CACHE_H_
#define IMAGE_CACHE_H_

#include <inttypes.h>

#include "common/pixman_utils.h"
#include "common/canvas_base.h"
#include "common/ring.h"

/* FIXME: move back to display-channel.h (once structs are private) */
typedef struct Drawable Drawable;
typedef struct DisplayChannelClient DisplayChannelClient;

typedef struct ImageCacheItem {
    RingItem lru_link;
    uint64_t id;
#ifdef IMAGE_CACHE_AGE
    uint32_t age;
#endif
    struct ImageCacheItem *next;
    pixman_image_t *image;
} ImageCacheItem;

#define IMAGE_CACHE_HASH_SIZE 1024

typedef struct ImageCache {
    SpiceImageCache base;
    ImageCacheItem *hash_table[IMAGE_CACHE_HASH_SIZE];
    Ring lru;
#ifdef IMAGE_CACHE_AGE
    uint32_t age;
#else
    uint32_t num_items;
#endif
} ImageCache;

int          image_cache_hit               (ImageCache *cache, uint64_t id);
void         image_cache_init              (ImageCache *cache);
void         image_cache_reset             (ImageCache *cache);
void         image_cache_aging             (ImageCache *cache);
void         image_cache_localize          (ImageCache *cache, SpiceImage **image_ptr,
                                            SpiceImage *image_store, Drawable *drawable);
void         image_cache_localize_brush    (ImageCache *cache, SpiceBrush *brush,
                                            SpiceImage *image_store);
void         image_cache_localize_mask     (ImageCache *cache, SpiceQMask *mask,
                                            SpiceImage *image_store);

#endif