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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.
- */
- #ifndef SkTypefaceCache_DEFINED
- #define SkTypefaceCache_DEFINED
- #include "include/core/SkRefCnt.h"
- #include "include/core/SkTypeface.h"
- #include "include/private/SkTArray.h"
- class SkTypefaceCache {
- public:
- SkTypefaceCache();
- /**
- * Callback for FindByProc. Returns true if the given typeface is a match
- * for the given context. The passed typeface is owned by the cache and is
- * not additionally ref()ed. The typeface may be in the disposed state.
- */
- typedef bool(*FindProc)(SkTypeface*, void* context);
- /**
- * Add a typeface to the cache. Later, if we need to purge the cache,
- * typefaces uniquely owned by the cache will be unref()ed.
- */
- void add(sk_sp<SkTypeface>);
- /**
- * Iterate through the cache, calling proc(typeface, ctx) for each typeface.
- * If proc returns true, then return that typeface.
- * If it never returns true, return nullptr.
- */
- sk_sp<SkTypeface> findByProcAndRef(FindProc proc, void* ctx) const;
- /**
- * This will unref all of the typefaces in the cache for which the cache
- * is the only owner. Normally this is handled automatically as needed.
- * This function is exposed for clients that explicitly want to purge the
- * cache (e.g. to look for leaks).
- */
- void purgeAll();
- /**
- * Helper: returns a unique fontID to pass to the constructor of
- * your subclass of SkTypeface
- */
- static SkFontID NewFontID();
- // These are static wrappers around a global instance of a cache.
- static void Add(sk_sp<SkTypeface>);
- static sk_sp<SkTypeface> FindByProcAndRef(FindProc proc, void* ctx);
- static void PurgeAll();
- /**
- * Debugging only: dumps the status of the typefaces in the cache
- */
- static void Dump();
- private:
- static SkTypefaceCache& Get();
- void purge(int count);
- SkTArray<sk_sp<SkTypeface>> fTypefaces;
- };
- #endif
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