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/*
* Copyright 2019 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrImageContext_DEFINED
#define GrImageContext_DEFINED
#include "include/core/SkRefCnt.h"
#include "include/private/base/SingleOwner.h"
#include "include/private/base/SkAPI.h"
#include "include/private/gpu/ganesh/GrContext_Base.h"
class GrContextThreadSafeProxy;
class GrImageContextPriv;
// This is now just a view on a ThreadSafeProxy, that SkImages can attempt to
// downcast to a GrDirectContext as a backdoor to some operations. Once we remove the backdoors,
// this goes away and SkImages just hold ThreadSafeProxies.
class GrImageContext : public GrContext_Base {
public:
~GrImageContext() override;
// Provides access to functions that aren't part of the public API.
GrImageContextPriv priv();
const GrImageContextPriv priv() const; // NOLINT(readability-const-return-type)
protected:
friend class GrImageContextPriv; // for hidden functions
GrImageContext(sk_sp<GrContextThreadSafeProxy>);
SK_API virtual void abandonContext();
SK_API virtual bool abandoned();
/** This is only useful for debug purposes */
skgpu::SingleOwner* singleOwner() const { return &fSingleOwner; }
GrImageContext* asImageContext() override { return this; }
private:
// When making promise images, we currently need a placeholder GrImageContext instance to give
// to the SkImage that has no real power, just a wrapper around the ThreadSafeProxy.
// TODO: De-power SkImage to ThreadSafeProxy or at least figure out a way to share one instance.
static sk_sp<GrImageContext> MakeForPromiseImage(sk_sp<GrContextThreadSafeProxy>);
// In debug builds we guard against improper thread handling
// This guard is passed to the GrDrawingManager and, from there to all the
// GrSurfaceDrawContexts. It is also passed to the GrResourceProvider and SkGpuDevice.
// TODO: Move this down to GrRecordingContext.
mutable skgpu::SingleOwner fSingleOwner;
};
#endif
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