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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrBackendSemaphore_DEFINED
#define GrBackendSemaphore_DEFINED
#include "include/gpu/ganesh/GrTypes.h" // IWYU pragma: keep
#include "include/private/base/SkAPI.h"
#include "include/private/base/SkAnySubclass.h"
#ifdef SK_DIRECT3D
#include "include/private/gpu/ganesh/GrD3DTypesMinimal.h"
#endif
#include <cstddef>
class GrBackendSemaphoreData;
/**
* Wrapper class for passing into and receiving data from Ganesh about a backend semaphore object.
*/
class SK_API GrBackendSemaphore {
public:
// The GrBackendSemaphore cannot be used until either init* is called, which will set the
// appropriate GrBackend.
GrBackendSemaphore();
~GrBackendSemaphore();
GrBackendSemaphore(const GrBackendSemaphore&);
GrBackendSemaphore& operator=(const GrBackendSemaphore&);
#ifdef SK_DIRECT3D
void initDirect3D(const GrD3DFenceInfo& info) {
fBackend = GrBackendApi::kDirect3D;
this->assignD3DFenceInfo(info);
fIsInitialized = true;
}
#endif
bool isInitialized() const { return fIsInitialized; }
GrBackendApi backend() const { return fBackend; }
#ifdef SK_DIRECT3D
bool getD3DFenceInfo(GrD3DFenceInfo* outInfo) const;
#endif
private:
friend class GrBackendSemaphorePriv;
friend class GrBackendSemaphoreData;
// Size determined by looking at the GrBackendSemaphoreData subclasses, then
// guessing-and-checking. Compiler will complain if this is too small - in that case,
// just increase the number.
inline constexpr static size_t kMaxSubclassSize = 24;
using AnySemaphoreData = SkAnySubclass<GrBackendSemaphoreData, kMaxSubclassSize>;
template <typename SemaphoreData>
GrBackendSemaphore(GrBackendApi api, SemaphoreData data) : fBackend(api), fIsInitialized(true) {
fSemaphoreData.emplace<SemaphoreData>(data);
}
#ifdef SK_DIRECT3D
void assignD3DFenceInfo(const GrD3DFenceInfo& info);
#endif
GrBackendApi fBackend;
AnySemaphoreData fSemaphoreData;
union {
void* fPlaceholder; // TODO(293490566)
#ifdef SK_DIRECT3D
GrD3DFenceInfo* fD3DFenceInfo;
#endif
};
bool fIsInitialized;
};
#endif
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