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/* -*- 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/>.
*/
#include <config.h>
#include "image-cache.h"
#include "red-parse-qxl.h"
#include "display-channel.h"
static ImageCacheItem *image_cache_find(ImageCache *cache, uint64_t id)
{
ImageCacheItem *item = cache->hash_table[id % IMAGE_CACHE_HASH_SIZE];
while (item) {
if (item->id == id) {
return item;
}
item = item->next;
}
return nullptr;
}
static bool image_cache_hit(ImageCache *cache, uint64_t id)
{
ImageCacheItem *item;
if (!(item = image_cache_find(cache, id))) {
return FALSE;
}
#ifdef IMAGE_CACHE_AGE
item->age = cache->age;
#endif
ring_remove(&item->lru_link);
ring_add(&cache->lru, &item->lru_link);
return TRUE;
}
static void image_cache_remove(ImageCache *cache, ImageCacheItem *item)
{
ImageCacheItem **now;
now = &cache->hash_table[item->id % IMAGE_CACHE_HASH_SIZE];
for (;;) {
spice_assert(*now);
if (*now == item) {
*now = item->next;
break;
}
now = &(*now)->next;
}
ring_remove(&item->lru_link);
pixman_image_unref(item->image);
g_free(item);
#ifndef IMAGE_CACHE_AGE
cache->num_items--;
#endif
}
#define IMAGE_CACHE_MAX_ITEMS 2
static void image_cache_put(SpiceImageCache *spice_cache, uint64_t id, pixman_image_t *image)
{
ImageCache *cache = SPICE_UPCAST(ImageCache, spice_cache);
ImageCacheItem *item;
#ifndef IMAGE_CACHE_AGE
if (cache->num_items == IMAGE_CACHE_MAX_ITEMS) {
SPICE_VERIFY(SPICE_OFFSETOF(ImageCacheItem, lru_link) == 0);
ImageCacheItem *tail =
SPICE_CONTAINEROF(ring_get_tail(&cache->lru), ImageCacheItem, lru_link);
spice_assert(tail);
image_cache_remove(cache, tail);
}
#endif
item = g_new(ImageCacheItem, 1);
item->id = id;
#ifdef IMAGE_CACHE_AGE
item->age = cache->age;
#else
cache->num_items++;
#endif
item->image = pixman_image_ref(image);
ring_item_init(&item->lru_link);
item->next = cache->hash_table[item->id % IMAGE_CACHE_HASH_SIZE];
cache->hash_table[item->id % IMAGE_CACHE_HASH_SIZE] = item;
ring_add(&cache->lru, &item->lru_link);
}
static pixman_image_t *image_cache_get(SpiceImageCache *spice_cache, uint64_t id)
{
ImageCache *cache = SPICE_UPCAST(ImageCache, spice_cache);
ImageCacheItem *item = image_cache_find(cache, id);
if (!item) {
spice_error("not found");
}
return pixman_image_ref(item->image);
}
void image_cache_init(ImageCache *cache)
{
static const SpiceImageCacheOps image_cache_ops = {
image_cache_put,
image_cache_get,
};
cache->base.ops = &image_cache_ops;
memset(cache->hash_table, 0, sizeof(cache->hash_table));
ring_init(&cache->lru);
#ifdef IMAGE_CACHE_AGE
cache->age = 0;
#else
cache->num_items = 0;
#endif
}
void image_cache_reset(ImageCache *cache)
{
ImageCacheItem *item;
SPICE_VERIFY(SPICE_OFFSETOF(ImageCacheItem, lru_link) == 0);
while ((item = SPICE_CONTAINEROF(ring_get_head(&cache->lru), ImageCacheItem, lru_link))) {
image_cache_remove(cache, item);
}
#ifdef IMAGE_CACHE_AGE
cache->age = 0;
#endif
}
#define IMAGE_CACHE_DEPTH 4
void image_cache_aging(ImageCache *cache)
{
SPICE_VERIFY(SPICE_OFFSETOF(ImageCacheItem, lru_link) == 0);
#ifdef IMAGE_CACHE_AGE
ImageCacheItem *item;
cache->age++;
while ((item = (ImageCacheItem *)ring_get_tail(&cache->lru)) &&
cache->age - item->age > IMAGE_CACHE_DEPTH) {
image_cache_remove(cache, item);
}
#endif
}
void image_cache_localize(ImageCache *cache, SpiceImage **image_ptr,
SpiceImage *image_store, Drawable *drawable)
{
SpiceImage *image = *image_ptr;
if (image == nullptr) {
spice_assert(drawable != nullptr);
spice_assert(drawable->red_drawable->self_bitmap_image != nullptr);
*image_ptr = drawable->red_drawable->self_bitmap_image;
return;
}
if (image_cache_hit(cache, image->descriptor.id)) {
image_store->descriptor = image->descriptor;
image_store->descriptor.type = SPICE_IMAGE_TYPE_FROM_CACHE;
image_store->descriptor.flags = 0;
*image_ptr = image_store;
return;
}
switch (image->descriptor.type) {
case SPICE_IMAGE_TYPE_QUIC: {
image_store->descriptor = image->descriptor;
image_store->u.quic = image->u.quic;
*image_ptr = image_store;
#ifdef IMAGE_CACHE_AGE
image_store->descriptor.flags |= SPICE_IMAGE_FLAGS_CACHE_ME;
#else
if (image_store->descriptor.width * image->descriptor.height >= 640 * 480) {
image_store->descriptor.flags |= SPICE_IMAGE_FLAGS_CACHE_ME;
}
#endif
break;
}
case SPICE_IMAGE_TYPE_BITMAP:
case SPICE_IMAGE_TYPE_SURFACE:
/* nothing */
break;
default:
spice_error("invalid image type");
}
}
void image_cache_localize_brush(ImageCache *cache, SpiceBrush *brush, SpiceImage *image_store)
{
if (brush->type == SPICE_BRUSH_TYPE_PATTERN) {
image_cache_localize(cache, &brush->u.pattern.pat, image_store, nullptr);
}
}
void image_cache_localize_mask(ImageCache *cache, SpiceQMask *mask, SpiceImage *image_store)
{
if (mask->bitmap) {
image_cache_localize(cache, &mask->bitmap, image_store, nullptr);
}
}
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