be035702f3
R=robertphillips@google.com TBR=robertphillips@google.com Author: bsalomon@google.com Review URL: https://codereview.chromium.org/413523002
102 lines
3.2 KiB
C++
102 lines
3.2 KiB
C++
/*
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* Copyright 2011 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 GrGpuObject_DEFINED
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#define GrGpuObject_DEFINED
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#include "GrCacheable.h"
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#include "SkTInternalLList.h"
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class GrGpu;
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class GrContext;
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/**
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* Base class for the GPU objects created by a GrContext.
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*/
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class GrGpuObject : public GrCacheable {
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public:
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SK_DECLARE_INST_COUNT(GrGpuObject)
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/**
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* Frees the object in the underlying 3D API. It must be safe to call this
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* when the object has been previously abandoned.
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*/
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void release();
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/**
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* Removes references to objects in the underlying 3D API without freeing
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* them. Used when the API context has been torn down before the GrContext.
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*/
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void abandon();
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/**
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* Tests whether a object has been abandoned or released. All objects will
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* be in this state after their creating GrContext is destroyed or has
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* contextLost called. It's up to the client to test wasDestroyed() before
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* attempting to use an object if it holds refs on objects across
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* ~GrContext, freeResources with the force flag, or contextLost.
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*
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* @return true if the object has been released or abandoned,
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* false otherwise.
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*/
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bool wasDestroyed() const { return NULL == fGpu; }
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/**
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* Retrieves the context that owns the object. Note that it is possible for
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* this to return NULL. When objects have been release()ed or abandon()ed
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* they no longer have an owning context. Destroying a GrContext
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* automatically releases all its resources.
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*/
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const GrContext* getContext() const;
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GrContext* getContext();
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virtual bool isValidOnGpu() const SK_OVERRIDE { return !this->wasDestroyed(); }
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protected:
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/**
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* isWrapped indicates we have wrapped a client-created backend object in a GrGpuObject. If it
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* is true then the client is responsible for the lifetime of the underlying backend object.
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* Otherwise, our onRelease() should free the object.
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*/
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GrGpuObject(GrGpu* gpu, bool isWrapped);
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virtual ~GrGpuObject();
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GrGpu* getGpu() const { return fGpu; }
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// Derived classes should always call their parent class' onRelease
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// and onAbandon methods in their overrides.
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virtual void onRelease() {};
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virtual void onAbandon() {};
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bool isWrapped() const { return kWrapped_FlagBit & fFlags; }
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private:
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#ifdef SK_DEBUG
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friend class GrGpu; // for assert in GrGpu to access getGpu
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#endif
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// We're in an internal doubly linked list
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SK_DECLARE_INTERNAL_LLIST_INTERFACE(GrGpuObject);
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GrGpu* fGpu; // not reffed. The GrGpu can be deleted while there
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// are still live GrGpuObjects. It will call
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// release() on all such objects in its destructor.
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enum Flags {
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/**
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* This object wraps a GPU object given to us by the user.
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* Lifetime management is left up to the user (i.e., we will not
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* free it).
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*/
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kWrapped_FlagBit = 0x1,
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};
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uint32_t fFlags;
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typedef GrCacheable INHERITED;
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};
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#endif
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