/*

 * 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 GrYUVABackendTextures_DEFINED

#define GrYUVABackendTextures_DEFINED

#include "include/core/SkYUVAInfo.h"

#include "include/gpu/GrBackendSurface.h"

#include <tuple>

/**

 * A description of a set GrBackendTextures that hold the planar data described by a SkYUVAInfo.

 */

class SK_API GrYUVABackendTextureInfo {

public:

    static constexpr auto kMaxPlanes = SkYUVAInfo::kMaxPlanes;

    /** Default GrYUVABackendTextureInfo is invalid. */

    GrYUVABackendTextureInfo() = default;

    /**

     * Initializes a GrYUVABackendTextureInfo to describe a set of textures that can store the

     * planes indicated by the SkYUVAInfo. The texture dimensions are taken from the SkYUVAInfo's

     * plane dimensions. All the described textures share a common origin. The planar image this

     * describes will be mip mapped if all the textures are individually mip mapped as indicated

     * by GrMipmapped. This will produce an invalid result (return false from isValid()) if the

     * passed formats' channels don't agree with SkYUVAInfo.

     */

    GrYUVABackendTextureInfo(const SkYUVAInfo&,

                             const GrBackendFormat[kMaxPlanes],

                             GrMipmapped,

                             GrSurfaceOrigin);

    GrYUVABackendTextureInfo(const GrYUVABackendTextureInfo&) = default;

    GrYUVABackendTextureInfo& operator=(const GrYUVABackendTextureInfo&) = default;

    bool operator==(const GrYUVABackendTextureInfo&) const;

    bool operator!=(const GrYUVABackendTextureInfo& that) const { return !(*this == that); }

    const SkYUVAInfo& yuvaInfo() const { return fYUVAInfo; }

    SkYUVColorSpace yuvColorSpace() const { return fYUVAInfo.yuvColorSpace(); }

    GrMipmapped mipmapped() const { return fMipmapped; }

    GrSurfaceOrigin textureOrigin() const { return fTextureOrigin; }

    /** The number of SkPixmap planes, 0 if this GrYUVABackendTextureInfo is invalid. */

    int numPlanes() const { return fYUVAInfo.numPlanes(); }

    /** Format of the ith plane, or invalid format if i >= numPlanes() */

    const GrBackendFormat& planeFormat(int i) const { return fPlaneFormats[i]; }

    /**

     * Returns true if this has been configured with a valid SkYUVAInfo with compatible texture

     * formats.

     */

    bool isValid() const { return fYUVAInfo.isValid(); }

    /**

     * Computes a YUVALocations representation of the planar layout. The result is guaranteed to be

     * valid if this->isValid().

     */

    SkYUVAInfo::YUVALocations toYUVALocations() const;

private:

    SkYUVAInfo fYUVAInfo;

    GrBackendFormat fPlaneFormats[kMaxPlanes];

    GrMipmapped fMipmapped = GrMipmapped::kNo;

    GrSurfaceOrigin fTextureOrigin = kTopLeft_GrSurfaceOrigin;

};

/**

 * A set of GrBackendTextures that hold the planar data for an image described a SkYUVAInfo.

 */

class SK_API GrYUVABackendTextures {

public:

    GrYUVABackendTextures() = default;

    GrYUVABackendTextures(const GrYUVABackendTextures&) = delete;

    GrYUVABackendTextures(GrYUVABackendTextures&&) = default;

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

    GrYUVABackendTextures& operator=(GrYUVABackendTextures&&) = default;

    GrYUVABackendTextures(const SkYUVAInfo&,

                          const GrBackendTexture[SkYUVAInfo::kMaxPlanes],

                          GrSurfaceOrigin textureOrigin);

    const std::array<GrBackendTexture, SkYUVAInfo::kMaxPlanes>& textures() const {

        return fTextures;

    }

    GrBackendTexture texture(int i) const {

        SkASSERT(i >= 0 && i < SkYUVAInfo::kMaxPlanes);

        return fTextures[static_cast<size_t>(i)];

    }

Unexecuted instantiation: GrYUVABackendTextures::texture(int) const

Unexecuted instantiation: GrYUVABackendTextures::texture(int) const

    const SkYUVAInfo& yuvaInfo() const { return fYUVAInfo; }

    int numPlanes() const { return fYUVAInfo.numPlanes(); }

    GrSurfaceOrigin textureOrigin() const { return fTextureOrigin; }

    bool isValid() const { return fYUVAInfo.isValid(); }

    /**

     * Computes a YUVALocations representation of the planar layout. The result is guaranteed to be

     * valid if this->isValid().

     */

    SkYUVAInfo::YUVALocations toYUVALocations() const;

private:

    SkYUVAInfo fYUVAInfo;

    std::array<GrBackendTexture, SkYUVAInfo::kMaxPlanes> fTextures;

    GrSurfaceOrigin fTextureOrigin = kTopLeft_GrSurfaceOrigin;

};

#endif