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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/app_list/icon_cache.h"
#include "base/logging.h"
#include "base/md5.h"
#include "ui/gfx/size.h"
namespace {
// Gets cache key based on |image| contents and desired |size|.
std::string GetKey(const SkBitmap& image, const gfx::Size& size) {
SkAutoLockPixels image_lock(image);
base::MD5Digest digest;
MD5Sum(image.getPixels(), image.getSize(), &digest);
return MD5DigestToBase16(digest) + "." + size.ToString();
}
} // namespace
namespace app_list {
// static
IconCache* IconCache::instance_ = NULL;
// static
void IconCache::CreateInstance() {
DCHECK(!instance_);
instance_ = new IconCache;
}
// static
void IconCache::DeleteInstance() {
DCHECK(instance_);
delete instance_;
instance_ = NULL;
}
// static
IconCache* IconCache::GetInstance() {
DCHECK(instance_);
return instance_;
}
void IconCache::MarkAllEntryUnused() {
for (Cache::iterator i = cache_.begin(); i != cache_.end(); ++i)
i->second.used = false;
}
void IconCache::PurgeAllUnused() {
for (Cache::iterator i = cache_.begin(); i != cache_.end();) {
Cache::iterator current(i);
++i;
if (!current->second.used)
cache_.erase(current);
}
}
bool IconCache::Get(const SkBitmap& src,
const gfx::Size& size,
SkBitmap* processed) {
Cache::iterator it = cache_.find(GetKey(src, size));
if (it == cache_.end())
return false;
it->second.used = true;
if (processed)
*processed = it->second.image;
return true;
}
void IconCache::Put(const SkBitmap& src,
const gfx::Size& size,
const SkBitmap& processed) {
const std::string key = GetKey(src, size);
cache_[key].image = processed;
cache_[key].used = true;
}
IconCache::IconCache() {
}
IconCache::~IconCache() {
}
} // namespace app_list
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