mirror of https://github.com/axmolengine/axmol.git
78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
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/*
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Copyright 2011 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#ifndef GrResource_DEFINED
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#define GrResource_DEFINED
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#include "GrRefCnt.h"
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class GrGpu;
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class GrResource : public GrRefCnt {
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public:
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explicit GrResource(GrGpu* gpu);
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virtual ~GrResource() {
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// subclass should have released this.
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GrAssert(!isValid());
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}
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/**
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* Frees the resource in the underlying 3D API. It must be safe to call this
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* when the resource 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 resource has been abandoned or released. All resources
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* will 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 isValid() before
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* attempting to use a resource if it holds refs on resources 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 resource has been released or abandoned,
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* false otherwise.
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*/
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bool isValid() const { return NULL != fGpu; }
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protected:
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virtual void onRelease() = 0;
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virtual void onAbandon() = 0;
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GrGpu* getGpu() const { return fGpu; }
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private:
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GrResource(); // unimpl
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GrGpu* fGpu; // not reffed. This can outlive the GrGpu.
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friend class GrGpu; // GrGpu manages list of resources.
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GrResource* fNext; // dl-list of resources per-GrGpu
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GrResource* fPrevious;
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typedef GrRefCnt INHERITED;
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};
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#endif
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