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/*
* 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)];
}
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
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