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* Copyright 2019 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#ifndef YUVUtils_DEFINED
#define YUVUtils_DEFINED
#include "include/core/SkColorSpace.h"
#include "include/core/SkImage.h"
#include "include/core/SkYUVAPixmaps.h"
#include "include/gpu/GrBackendSurface.h"
#include "src/core/SkAutoMalloc.h"
#include <tuple>
class SkData;
namespace sk_gpu_test {
// Splits an input image into A8 YUV[A] planes using the passed subsampling and YUV color space. If
// the src image is opaque there will be three planes (Y, U, and V) and if not there will be a
// fourth A plane. The planes are returned along with a SkYUVAInfo describing the resulting planar
// image. Images are made as textures if GrRecordingContext is not null, otherwise as cpu images.
std::tuple<std::array<sk_sp<SkImage>, SkYUVAInfo::kMaxPlanes>, SkYUVAInfo>
// Utility that decodes a JPEG but preserves the YUVA8 planes in the image, and uses
// MakeFromYUVAPixmaps to create a GPU multiplane YUVA image for a context. It extracts the planar
// data once, and lazily creates the actual SkImage when the GrContext is provided (and refreshes
// the image if the context has changed, as in Viewer)
class LazyYUVImage {
// Returns null if the data could not be extracted into YUVA planes
static std::unique_ptr<LazyYUVImage> Make(sk_sp<SkData> data,
GrMipmapped = GrMipmapped::kNo,
sk_sp<SkColorSpace> = nullptr);
static std::unique_ptr<LazyYUVImage> Make(SkYUVAPixmaps,
GrMipmapped = GrMipmapped::kNo,
sk_sp<SkColorSpace> = nullptr);
enum class Type { kFromPixmaps, kFromGenerator, kFromTextures };
SkISize dimensions() const { return fPixmaps.yuvaInfo().dimensions(); }
sk_sp<SkImage> refImage(GrRecordingContext* rContext, Type);
// Decoded YUV data
SkYUVAPixmaps fPixmaps;
GrMipmapped fMipmapped;
sk_sp<SkColorSpace> fColorSpace;
// Memoized SkImages formed with planes, one for each Type.
sk_sp<SkImage> fYUVImage[4];
LazyYUVImage() = default;
bool reset(sk_sp<SkData> data, GrMipmapped, sk_sp<SkColorSpace>);
bool reset(SkYUVAPixmaps pixmaps, GrMipmapped, sk_sp<SkColorSpace>);
bool ensureYUVImage(GrRecordingContext* rContext, Type type);
} // namespace sk_gpu_test
#endif // YUVUtils_DEFINED