| /* |
| * 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 |