e4387382c2
Sometimes it's helpful to think about subsampling separately from how the channels are spread across planes. Bug: skia:10632 Change-Id: Ib03f71195f9706ef6def418b1f2125c29e0cf738 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/334102 Commit-Queue: Brian Salomon <bsalomon@google.com> Reviewed-by: Jim Van Verth <jvanverth@google.com> Reviewed-by: Robert Phillips <robertphillips@google.com>
120 lines
4.1 KiB
C++
120 lines
4.1 KiB
C++
/*
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* Copyright 2020 Google LLC
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef GrYUVABackendTextures_DEFINED
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#define GrYUVABackendTextures_DEFINED
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#include "include/core/SkYUVAInfo.h"
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#include "include/gpu/GrBackendSurface.h"
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#include <tuple>
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struct SkYUVASizeInfo;
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struct SkYUVAIndex;
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/**
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* A description of a set GrBackendTextures that hold the planar data described by a SkYUVAInfo.
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*/
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class SK_API GrYUVABackendTextureInfo {
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public:
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static constexpr auto kMaxPlanes = SkYUVAInfo::kMaxPlanes;
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/** Default GrYUVABackendTextureInfo is invalid. */
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GrYUVABackendTextureInfo() = default;
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/**
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* Initializes a GrYUVABackendTextureInfo to describe a set of textures that can store the
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* planes indicated by the SkYUVAInfo. The texture dimensions are taken from the SkYUVAInfo's
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* plane dimensions. All the described textures share a common origin. The planar image this
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* describes will be mip mapped if all the textures are individually mip mapped as indicated
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* by GrMipmapped. This will produce an invalid result (return false from isValid()) if the
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* passed formats' channels don't agree with SkYUVAInfo.
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*/
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GrYUVABackendTextureInfo(const SkYUVAInfo&,
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const GrBackendFormat[kMaxPlanes],
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GrMipmapped,
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GrSurfaceOrigin);
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GrYUVABackendTextureInfo(const GrYUVABackendTextureInfo&) = default;
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GrYUVABackendTextureInfo& operator=(const GrYUVABackendTextureInfo&) = default;
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bool operator==(const GrYUVABackendTextureInfo&) const;
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bool operator!=(const GrYUVABackendTextureInfo& that) const { return !(*this == that); }
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const SkYUVAInfo& yuvaInfo() const { return fYUVAInfo; }
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SkYUVColorSpace yuvColorSpace() const { return fYUVAInfo.yuvColorSpace(); }
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GrMipmapped mipmapped() const { return fMipmapped; }
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GrSurfaceOrigin textureOrigin() const { return fTextureOrigin; }
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/** The number of SkPixmap planes, 0 if this GrYUVABackendTextureInfo is invalid. */
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int numPlanes() const { return fYUVAInfo.numPlanes(); }
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/** Format of the ith plane, or invalid format if i >= numPlanes() */
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const GrBackendFormat& planeFormat(int i) const { return fPlaneFormats[i]; }
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/**
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* Returns true if this has been configured with a valid SkYUVAInfo with compatible texture
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* formats.
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*/
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bool isValid() const { return fYUVAInfo.isValid(); }
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bool toYUVAIndices(SkYUVAIndex[SkYUVAIndex::kIndexCount]) const;
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private:
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SkYUVAInfo fYUVAInfo;
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GrBackendFormat fPlaneFormats[kMaxPlanes];
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GrMipmapped fMipmapped = GrMipmapped::kNo;
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GrSurfaceOrigin fTextureOrigin = kTopLeft_GrSurfaceOrigin;
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};
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/**
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* A set of GrBackendTextures that hold the planar data for an image described a SkYUVAInfo.
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*/
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class SK_API GrYUVABackendTextures {
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public:
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GrYUVABackendTextures() = default;
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GrYUVABackendTextures(const GrYUVABackendTextures&) = delete;
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GrYUVABackendTextures(GrYUVABackendTextures&&) = default;
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GrYUVABackendTextures& operator=(const GrYUVABackendTextures&) = delete;
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GrYUVABackendTextures& operator=(GrYUVABackendTextures&&) = default;
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GrYUVABackendTextures(const SkYUVAInfo&,
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const GrBackendTexture[SkYUVAInfo::kMaxPlanes],
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GrSurfaceOrigin textureOrigin);
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const std::array<GrBackendTexture, SkYUVAInfo::kMaxPlanes>& textures() const {
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return fTextures;
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}
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GrBackendTexture texture(int i) const {
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SkASSERT(i >= 0 && i < SkYUVAInfo::kMaxPlanes);
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return fTextures[static_cast<size_t>(i)];
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}
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const SkYUVAInfo& yuvaInfo() const { return fYUVAInfo; }
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int numPlanes() const { return fYUVAInfo.numPlanes(); }
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GrSurfaceOrigin textureOrigin() const { return fTextureOrigin; }
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bool isValid() const { return fYUVAInfo.isValid(); }
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bool toYUVAIndices(SkYUVAIndex[SkYUVAIndex::kIndexCount]) const;
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private:
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SkYUVAInfo fYUVAInfo;
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std::array<GrBackendTexture, SkYUVAInfo::kMaxPlanes> fTextures;
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GrSurfaceOrigin fTextureOrigin = kTopLeft_GrSurfaceOrigin;
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};
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#endif
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