/*
 * Copyright 2020 Google LLC
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef GrD3DTypesPriv_DEFINED
#define GrD3DTypesPriv_DEFINED

#include "include/core/SkRefCnt.h"
#include "include/gpu/d3d/GrD3DTypes.h"

class GrD3DResourceState;

// This struct is to used to store the the actual information about the Direct3D backend image on
// GrBackendTexture and GrBackendRenderTarget. When a client calls getD3DTextureInfo on a
// GrBackendTexture/RenderTarget, we use the GrD3DBackendSurfaceInfo to create a snapshot
// GrD3DTextureInfo object. Internally, this uses a ref count GrD3DResourceState object to track the
// current D3D12_RESOURCE_STATES which can be shared with an internal GrD3DBaseTexture so that state
// updates can be seen by all users of the texture.
struct GrD3DBackendSurfaceInfo {
    GrD3DBackendSurfaceInfo(GrD3DTextureInfo info, GrD3DResourceState* state)
            : fTextureInfo(info), fResourceState(state) {}

    void cleanup();

    GrD3DBackendSurfaceInfo& operator=(const GrD3DBackendSurfaceInfo&) = delete;

    // Assigns the passed in GrD3DBackendSurfaceInfo to this object. if isValid is true we will also
    // attempt to unref the old fLayout on this object.
    void assign(const GrD3DBackendSurfaceInfo&, bool isValid);

    void setResourceState(GrD3DResourceStateEnum state);

    sk_sp<GrD3DResourceState> getGrD3DResourceState() const;

    GrD3DTextureInfo snapTextureInfo() const;

    bool isProtected() const { return fTextureInfo.fProtected == GrProtected::kYes; }
#if GR_TEST_UTILS
    bool operator==(const GrD3DBackendSurfaceInfo& that) const;
#endif

private:
    GrD3DTextureInfo    fTextureInfo;
    GrD3DResourceState* fResourceState;
};

#endif