11c6b39cfa
when their size has changed. GrResourceCacheEntry now holds a reference to the cache, and a cached value of the resource's most recent size. Also utilizes this new functionality for mipmaps, and adds a test for changing resource sizes. R=bsalomon@google.com, robertphillips@google.com Author: cdalton@nvidia.com Review URL: https://codereview.chromium.org/257093002 git-svn-id: http://skia.googlecode.com/svn/trunk@14576 2bbb7eff-a529-9590-31e7-b0007b416f81
64 lines
1.8 KiB
C++
64 lines
1.8 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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protected:
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GrCacheable() : fCacheEntry(NULL) {}
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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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typedef SkRefCnt INHERITED;
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};
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#endif
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