| |
| /* |
| * 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 "SkThread.h" |
| |
| #define TYPEFACE_CACHE_LIMIT 128 |
| |
| void SkTypefaceCache::add(SkTypeface* face, SkTypeface::Style requestedStyle) { |
| if (fArray.count() >= TYPEFACE_CACHE_LIMIT) { |
| this->purge(TYPEFACE_CACHE_LIMIT >> 2); |
| } |
| |
| Rec* rec = fArray.append(); |
| rec->fFace = face; |
| rec->fRequestedStyle = requestedStyle; |
| face->ref(); |
| } |
| |
| SkTypeface* SkTypefaceCache::findByID(SkFontID fontID) const { |
| const Rec* curr = fArray.begin(); |
| const Rec* stop = fArray.end(); |
| while (curr < stop) { |
| if (curr->fFace->uniqueID() == fontID) { |
| return curr->fFace; |
| } |
| curr += 1; |
| } |
| return NULL; |
| } |
| |
| SkTypeface* SkTypefaceCache::findByProc(FindProc proc, void* ctx) const { |
| const Rec* curr = fArray.begin(); |
| const Rec* stop = fArray.end(); |
| while (curr < stop) { |
| if (proc(curr->fFace, curr->fRequestedStyle, ctx)) { |
| return curr->fFace; |
| } |
| curr += 1; |
| } |
| return NULL; |
| } |
| |
| void SkTypefaceCache::purge(int numToPurge) { |
| int count = fArray.count(); |
| int i = 0; |
| while (i < count) { |
| SkTypeface* face = fArray[i].fFace; |
| if (1 == face->getRefCnt()) { |
| face->unref(); |
| fArray.remove(i); |
| --count; |
| if (--numToPurge == 0) { |
| return; |
| } |
| } else { |
| ++i; |
| } |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkTypefaceCache& SkTypefaceCache::Get() { |
| static SkTypefaceCache gCache; |
| return gCache; |
| } |
| |
| SkFontID SkTypefaceCache::NewFontID() { |
| static int32_t gFontID; |
| return sk_atomic_inc(&gFontID) + 1; |
| } |
| |
| static SkMutex gMutex; |
| |
| void SkTypefaceCache::Add(SkTypeface* face, SkTypeface::Style requestedStyle) { |
| SkAutoMutexAcquire ama(gMutex); |
| Get().add(face, requestedStyle); |
| } |
| |
| SkTypeface* SkTypefaceCache::FindByID(SkFontID fontID) { |
| SkAutoMutexAcquire ama(gMutex); |
| return Get().findByID(fontID); |
| } |
| |
| SkTypeface* SkTypefaceCache::FindByProc(FindProc proc, void* ctx) { |
| SkAutoMutexAcquire ama(gMutex); |
| return Get().findByProc(proc, ctx); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #ifdef SK_DEBUG |
| static bool DumpProc(SkTypeface* face, SkTypeface::Style style, void* ctx) { |
| SkDebugf("SkTypefaceCache: face %p fontID %d style %d refcnt %d\n", |
| face, face->uniqueID(), style, face->getRefCnt()); |
| return false; |
| } |
| #endif |
| |
| void SkTypefaceCache::Dump() { |
| #ifdef SK_DEBUG |
| SkAutoMutexAcquire ama(gMutex); |
| (void)Get().findByProc(DumpProc, NULL); |
| #endif |
| } |
| |