зеркало из https://github.com/mozilla/moz-skia.git
78 строки
2.2 KiB
C++
78 строки
2.2 KiB
C++
/*
|
|
Copyright 2011 Google Inc.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
#ifndef GrResource_DEFINED
|
|
#define GrResource_DEFINED
|
|
|
|
#include "GrRefCnt.h"
|
|
|
|
class GrGpu;
|
|
|
|
class GrResource : public GrRefCnt {
|
|
public:
|
|
explicit GrResource(GrGpu* gpu);
|
|
|
|
virtual ~GrResource() {
|
|
// subclass should have released this.
|
|
GrAssert(!isValid());
|
|
}
|
|
|
|
/**
|
|
* Frees the resource in the underlying 3D API. It must be safe to call this
|
|
* when the resource has been previously abandoned.
|
|
*/
|
|
void release();
|
|
|
|
/**
|
|
* Removes references to objects in the underlying 3D API without freeing
|
|
* them. Used when the API context has been torn down before the GrContext.
|
|
*/
|
|
void abandon();
|
|
|
|
/**
|
|
* Tests whether a resource has been abandoned or released. All resources
|
|
* will be in this state after their creating GrContext is destroyed or has
|
|
* contextLost called. It's up to the client to test isValid() before
|
|
* attempting to use a resource if it holds refs on resources across
|
|
* ~GrContext, freeResources with the force flag, or contextLost.
|
|
*
|
|
* @return true if the resource has been released or abandoned,
|
|
* false otherwise.
|
|
*/
|
|
bool isValid() const { return NULL != fGpu; }
|
|
|
|
protected:
|
|
|
|
virtual void onRelease() = 0;
|
|
virtual void onAbandon() = 0;
|
|
|
|
GrGpu* getGpu() const { return fGpu; }
|
|
|
|
private:
|
|
GrResource(); // unimpl
|
|
|
|
GrGpu* fGpu; // not reffed. This can outlive the GrGpu.
|
|
|
|
friend class GrGpu; // GrGpu manages list of resources.
|
|
|
|
GrResource* fNext; // dl-list of resources per-GrGpu
|
|
GrResource* fPrevious;
|
|
|
|
typedef GrRefCnt INHERITED;
|
|
};
|
|
|
|
#endif
|