8b2fac4b25
R=jvanverth@google.com Author: bsalomon@google.com Review URL: https://codereview.chromium.org/338093005
74 lines
2.1 KiB
C++
74 lines
2.1 KiB
C++
/*
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* Copyright 2014 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef GrCacheable_DEFINED
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#define GrCacheable_DEFINED
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#include "SkRefCnt.h"
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class GrResourceCacheEntry;
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/**
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* Base class for objects that can be kept in the GrResourceCache.
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*/
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class GrCacheable : public SkRefCnt {
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public:
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SK_DECLARE_INST_COUNT(GrCacheable)
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/**
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* Retrieves the amount of GPU memory used by this resource in bytes. It is
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* approximate since we aren't aware of additional padding or copies made
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* by the driver.
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*
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* @return the amount of GPU memory used in bytes
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*/
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virtual size_t gpuMemorySize() const = 0;
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/**
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* Checks whether the GPU memory allocated to this resource is still in effect.
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* It can become invalid if its context is destroyed or lost, in which case it
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* should no longer count against the GrResourceCache budget.
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*
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* @return true if this resource is still holding GPU memory
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* false otherwise.
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*/
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virtual bool isValidOnGpu() const = 0;
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void setCacheEntry(GrResourceCacheEntry* cacheEntry) { fCacheEntry = cacheEntry; }
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GrResourceCacheEntry* getCacheEntry() { return fCacheEntry; }
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/**
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* Gets an id that is unique for this GrCacheable object. It is static in that it does
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* not change when the content of the GrCacheable object changes. This will never return
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* 0.
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*/
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uint32_t getGenerationID() const;
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protected:
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GrCacheable()
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: fCacheEntry(NULL)
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, fGenID(0) {}
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bool isInCache() const { return NULL != fCacheEntry; }
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/**
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* This entry point should be called whenever gpuMemorySize() begins
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* reporting a different size. If the object is in the cache, it will call
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* gpuMemorySize() immediately and pass the new size on to the resource
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* cache.
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*/
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void didChangeGpuMemorySize() const;
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private:
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GrResourceCacheEntry* fCacheEntry; // NULL if not in cache
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mutable uint32_t fGenID;
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typedef SkRefCnt INHERITED;
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};
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#endif
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