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/*
* 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 "SkTypefaceCache.h"
#include "SkAtomics.h"
#include "SkMutex.h"
#define TYPEFACE_CACHE_LIMIT 1024
SkTypefaceCache::SkTypefaceCache() {}
void SkTypefaceCache::add(SkTypeface* face) {
if (fTypefaces.count() >= TYPEFACE_CACHE_LIMIT) {
this->purge(TYPEFACE_CACHE_LIMIT >> 2);
}
fTypefaces.emplace_back(SkRef(face));
}
SkTypeface* SkTypefaceCache::findByProcAndRef(FindProc proc, void* ctx) const {
for (const sk_sp<SkTypeface>& typeface : fTypefaces) {
if (proc(typeface.get(), ctx)) {
return SkRef(typeface.get());
}
}
return nullptr;
}
void SkTypefaceCache::purge(int numToPurge) {
int count = fTypefaces.count();
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.count());
}
///////////////////////////////////////////////////////////////////////////////
SkTypefaceCache& SkTypefaceCache::Get() {
static SkTypefaceCache gCache;
return gCache;
}
SkFontID SkTypefaceCache::NewFontID() {
static int32_t gFontID;
return sk_atomic_inc(&gFontID) + 1;
}
SK_DECLARE_STATIC_MUTEX(gMutex);
void SkTypefaceCache::Add(SkTypeface* face) {
SkAutoMutexAcquire ama(gMutex);
Get().add(face);
}
SkTypeface* SkTypefaceCache::FindByProcAndRef(FindProc proc, void* ctx) {
SkAutoMutexAcquire ama(gMutex);
return Get().findByProcAndRef(proc, ctx);
}
void SkTypefaceCache::PurgeAll() {
SkAutoMutexAcquire ama(gMutex);
Get().purgeAll();
}
///////////////////////////////////////////////////////////////////////////////
#ifdef SK_DEBUG
static bool DumpProc(SkTypeface* face, void* ctx) {
SkString n;
face->getFamilyName(&n);
SkFontStyle s = face->fontStyle();
SkFontID id = face->uniqueID();
SkDebugf("SkTypefaceCache: face %p fontID %d weight %d width %d style %d refcnt %d name %s\n",
face, id, s.weight(), s.width(), s.slant(), face->getRefCnt(), n.c_str());
return false;
}
#endif
void SkTypefaceCache::Dump() {
#ifdef SK_DEBUG
(void)Get().findByProcAndRef(DumpProc, nullptr);
#endif
}
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