blob: 7681b239af6f1fda9099c39af4c4a54f472ef40d [file] [log] [blame]
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/private/base/SkMutex.h"
#include "src/core/SkTypefaceCache.h"
#include <atomic>
#define TYPEFACE_CACHE_LIMIT 1024
SkTypefaceCache::SkTypefaceCache() {}
void SkTypefaceCache::add(sk_sp<SkTypeface> face) {
if (fTypefaces.size() >= TYPEFACE_CACHE_LIMIT) {
this->purge(TYPEFACE_CACHE_LIMIT >> 2);
}
fTypefaces.emplace_back(std::move(face));
}
sk_sp<SkTypeface> SkTypefaceCache::findByProcAndRef(FindProc proc, void* ctx) const {
for (const sk_sp<SkTypeface>& typeface : fTypefaces) {
if (proc(typeface.get(), ctx)) {
return typeface;
}
}
return nullptr;
}
void SkTypefaceCache::purge(int numToPurge) {
int count = fTypefaces.size();
int i = 0;
while (i < count) {
if (fTypefaces[i]->unique()) {
fTypefaces.removeShuffle(i);
--count;
if (--numToPurge == 0) {
return;
}
} else {
++i;
}
}
}
void SkTypefaceCache::purgeAll() {
this->purge(fTypefaces.size());
}
///////////////////////////////////////////////////////////////////////////////
SkTypefaceCache& SkTypefaceCache::Get() {
static SkTypefaceCache gCache;
return gCache;
}
SkTypefaceID SkTypefaceCache::NewTypefaceID() {
static std::atomic<int32_t> nextID{1};
return nextID.fetch_add(1, std::memory_order_relaxed);
}
static SkMutex& typeface_cache_mutex() {
static SkMutex& mutex = *(new SkMutex);
return mutex;
}
void SkTypefaceCache::Add(sk_sp<SkTypeface> face) {
SkAutoMutexExclusive ama(typeface_cache_mutex());
Get().add(std::move(face));
}
sk_sp<SkTypeface> SkTypefaceCache::FindByProcAndRef(FindProc proc, void* ctx) {
SkAutoMutexExclusive ama(typeface_cache_mutex());
return Get().findByProcAndRef(proc, ctx);
}
void SkTypefaceCache::PurgeAll() {
SkAutoMutexExclusive ama(typeface_cache_mutex());
Get().purgeAll();
}
///////////////////////////////////////////////////////////////////////////////
#ifdef SK_DEBUG
static bool DumpProc(SkTypeface* face, void* ctx) {
SkString n;
face->getFamilyName(&n);
SkFontStyle s = face->fontStyle();
SkTypefaceID id = face->uniqueID();
SkDebugf("SkTypefaceCache: face %p typefaceID %d weight %d width %d style %d name %s\n",
face, id, s.weight(), s.width(), s.slant(), n.c_str());
return false;
}
#endif
void SkTypefaceCache::Dump() {
#ifdef SK_DEBUG
(void)Get().findByProcAndRef(DumpProc, nullptr);
#endif
}