#include <SkRawCodec.h>

Inheritance diagram for SkRawCodec:

Public Member Functions
	~SkRawCodec () override

Public Member Functions inherited from SkCodec
virtual	~SkCodec ()

SkImageInfo	getInfo () const

SkISize	dimensions () const

SkIRect	bounds () const

const skcms_ICCProfile *	getICCProfile () const

SkEncodedOrigin	getOrigin () const

SkISize	getScaledDimensions (float desiredScale) const

bool	getValidSubset (SkIRect *desiredSubset) const

SkEncodedImageFormat	getEncodedFormat () const

virtual std::unique_ptr< SkStream >	getEncodedData () const

Result	getPixels (const SkImageInfo &info, void pixels, size_t rowBytes, const Options )

Result	getPixels (const SkImageInfo &info, void *pixels, size_t rowBytes)

Result	getPixels (const SkPixmap &pm, const Options *opts=nullptr)

std::tuple< sk_sp< SkImage >, SkCodec::Result >	getImage (const SkImageInfo &info, const Options *opts=nullptr)

std::tuple< sk_sp< SkImage >, SkCodec::Result >	getImage ()

bool	queryYUVAInfo (const SkYUVAPixmapInfo::SupportedDataTypes &supportedDataTypes, SkYUVAPixmapInfo *yuvaPixmapInfo) const

Result	getYUVAPlanes (const SkYUVAPixmaps &yuvaPixmaps)

Result	startIncrementalDecode (const SkImageInfo &dstInfo, void dst, size_t rowBytes, const Options )

Result	startIncrementalDecode (const SkImageInfo &dstInfo, void *dst, size_t rowBytes)

Result	incrementalDecode (int *rowsDecoded=nullptr)

Result	startScanlineDecode (const SkImageInfo &dstInfo, const Options *options)

Result	startScanlineDecode (const SkImageInfo &dstInfo)

int	getScanlines (void *dst, int countLines, size_t rowBytes)

bool	skipScanlines (int countLines)

SkScanlineOrder	getScanlineOrder () const

int	nextScanline () const

int	outputScanline (int inputScanline) const

int	getFrameCount ()

bool	getFrameInfo (int index, FrameInfo *info) const

std::vector< FrameInfo >	getFrameInfo ()

int	getRepetitionCount ()

Static Public Member Functions
static std::unique_ptr< SkCodec >	MakeFromStream (std::unique_ptr< SkStream >, Result *)

Static Public Member Functions inherited from SkCodec
static constexpr size_t	MinBufferedBytesNeeded ()

static const char *	ResultToString (Result)

static std::unique_ptr< SkCodec >	MakeFromStream (std::unique_ptr< SkStream >, SkSpan< const SkCodecs::Decoder > decoders, Result =nullptr, SkPngChunkReader =nullptr, SelectionPolicy selectionPolicy=SelectionPolicy::kPreferStillImage)

static std::unique_ptr< SkCodec >	MakeFromStream (std::unique_ptr< SkStream >, Result =nullptr, SkPngChunkReader =nullptr, SelectionPolicy selectionPolicy=SelectionPolicy::kPreferStillImage)

static std::unique_ptr< SkCodec >	MakeFromData (sk_sp< SkData >, SkSpan< const SkCodecs::Decoder > decoders, SkPngChunkReader *=nullptr)

static std::unique_ptr< SkCodec >	MakeFromData (sk_sp< SkData >, SkPngChunkReader *=nullptr)

static void	Register (bool(peek)(const void , size_t), std::unique_ptr< SkCodec >(make)(std::unique_ptr< SkStream >, SkCodec::Result ))

Protected Member Functions
Result	onGetPixels (const SkImageInfo &dstInfo, void dst, size_t dstRowBytes, const Options &, int ) override

SkEncodedImageFormat	onGetEncodedFormat () const override

SkISize	onGetScaledDimensions (float desiredScale) const override

bool	onDimensionsSupported (const SkISize &) override

bool	usesColorXform () const override

Protected Member Functions inherited from SkCodec
const SkEncodedInfo &	getEncodedInfo () const

	SkCodec (SkEncodedInfo &&, XformFormat srcFormat, std::unique_ptr< SkStream >, SkEncodedOrigin=kTopLeft_SkEncodedOrigin)

void	setSrcXformFormat (XformFormat pixelFormat)

XformFormat	getSrcXformFormat () const

virtual bool	onGetGainmapInfo (SkGainmapInfo , std::unique_ptr< SkStream > )

virtual bool	onQueryYUVAInfo (const SkYUVAPixmapInfo::SupportedDataTypes &, SkYUVAPixmapInfo *) const

virtual Result	onGetYUVAPlanes (const SkYUVAPixmaps &)

virtual bool	onGetValidSubset (SkIRect *) const

bool	rewindIfNeeded ()

virtual bool	onRewind ()

SkStream *	stream ()

virtual SkScanlineOrder	onGetScanlineOrder () const

const SkImageInfo &	dstInfo () const

const Options &	options () const

int	currScanline () const

virtual int	onOutputScanline (int inputScanline) const

virtual bool	conversionSupported (const SkImageInfo &dst, bool srcIsOpaque, bool needsColorXform)

void	applyColorXform (void dst, const void src, int count) const

bool	colorXform () const

bool	xformOnDecode () const

virtual int	onGetFrameCount ()

virtual bool	onGetFrameInfo (int, FrameInfo *) const

virtual int	onGetRepetitionCount ()

Additional Inherited Members
Public Types inherited from SkCodec
enum	Result { kSuccess , kIncompleteInput , kErrorInInput , kInvalidConversion , kInvalidScale , kInvalidParameters , kInvalidInput , kCouldNotRewind , kInternalError , kUnimplemented }

enum class	SelectionPolicy { kPreferStillImage , kPreferAnimation }

enum	ZeroInitialized { kYes_ZeroInitialized , kNo_ZeroInitialized }

enum	SkScanlineOrder { kTopDown_SkScanlineOrder , kBottomUp_SkScanlineOrder }

Static Public Attributes inherited from SkCodec
static constexpr int	kNoFrame = -1

static constexpr int	kRepetitionCountInfinite = -1

Protected Types inherited from SkCodec
using	XformFormat = skcms_PixelFormat

Detailed Description

Definition at line 28 of file SkRawCodec.h.

Constructor & Destructor Documentation

◆ ~SkRawCodec()

SkRawCodec::~SkRawCodec ( )

override

Definition at line 824 of file SkRawCodec.cpp.

824{}

Member Function Documentation

◆ MakeFromStream()

std::unique_ptr< SkCodec > SkRawCodec::MakeFromStream	(	std::unique_ptr< SkStream >	stream,
		Result *	result
	)

static

Definition at line 649 of file SkRawCodec.cpp.

                                                                    {
    SkASSERT(result);
    if (!stream) {
        *result = SkCodec::kInvalidInput;
        return nullptr;
    }
    std::unique_ptr<SkRawStream> rawStream;
    if (is_asset_stream(*stream)) {
        rawStream = std::make_unique<SkRawAssetStream>(std::move(stream));
    } else {
        rawStream = std::make_unique<SkRawBufferedStream>(std::move(stream));
    }
 
    // Does not take the ownership of rawStream.
    SkPiexStream piexStream(rawStream.get());
    ::piex::PreviewImageData imageData;
    if (::piex::IsRaw(&piexStream)) {
        ::piex::Error error = ::piex::GetPreviewImageData(&piexStream, &imageData);
        if (error == ::piex::Error::kFail) {
            *result = kInvalidInput;
            return nullptr;
        }
 
        std::unique_ptr<SkEncodedInfo::ICCProfile> profile;
        if (imageData.color_space == ::piex::PreviewImageData::kAdobeRgb) {
            skcms_ICCProfile skcmsProfile;
            skcms_Init(&skcmsProfile);
            skcms_SetTransferFunction(&skcmsProfile, &SkNamedTransferFn::k2Dot2);
            skcms_SetXYZD50(&skcmsProfile, &SkNamedGamut::kAdobeRGB);
            profile = SkEncodedInfo::ICCProfile::Make(skcmsProfile);
        }
 
        //  Theoretically PIEX can return JPEG compressed image or uncompressed RGB image. We only
        //  handle the JPEG compressed preview image here.
        if (error == ::piex::Error::kOk && imageData.preview.length > 0 &&
            imageData.preview.format == ::piex::Image::kJpegCompressed)
        {
            // transferBuffer() is destructive to the rawStream. Abandon the rawStream after this
            // function call.
            // FIXME: one may avoid the copy of memoryStream and use the buffered rawStream.
            auto memoryStream = rawStream->transferBuffer(imageData.preview.offset,
                                                          imageData.preview.length);
            if (!memoryStream) {
                *result = kInvalidInput;
                return nullptr;
            }
            return SkJpegCodec::MakeFromStream(std::move(memoryStream), result,
                                               std::move(profile));
        }
    }
 
    if (!SkDngImage::IsTiffHeaderValid(rawStream.get())) {
        *result = kUnimplemented;
        return nullptr;
    }
 
    // Takes the ownership of the rawStream.
    std::unique_ptr<SkDngImage> dngImage(SkDngImage::NewFromStream(rawStream.release()));
    if (!dngImage) {
        *result = kInvalidInput;
        return nullptr;
    }
 
    *result = kSuccess;
    return std::unique_ptr<SkCodec>(new SkRawCodec(dngImage.release()));
}

◆ onDimensionsSupported()

bool SkRawCodec::onDimensionsSupported ( const SkISize & )

overrideprotectedvirtual

Subclasses should override if they support dimensions other than the srcInfo's.

Reimplemented from SkCodec.

Definition at line 814 of file SkRawCodec.cpp.

                                                         {
    const SkISize fullDim = this->dimensions();
    const float fullShortEdge = static_cast<float>(std::min(fullDim.fWidth, fullDim.fHeight));
    const float shortEdge = static_cast<float>(std::min(dim.fWidth, dim.fHeight));
 
    SkISize sizeFloor = this->onGetScaledDimensions(1.f / std::floor(fullShortEdge / shortEdge));
    SkISize sizeCeil = this->onGetScaledDimensions(1.f / std::ceil(fullShortEdge / shortEdge));
    return sizeFloor == dim || sizeCeil == dim;
}

◆ onGetEncodedFormat()

SkEncodedImageFormat SkRawCodec::onGetEncodedFormat ( ) const

inlineoverrideprotectedvirtual

Implements SkCodec.

Definition at line 44 of file SkRawCodec.h.

                                                             {
        return SkEncodedImageFormat::kDNG;
    }

◆ onGetPixels()

SkCodec::Result SkRawCodec::onGetPixels	(	const SkImageInfo &	info,
		void *	pixels,
		size_t	rowBytes,
		const Options &	,
		int *	rowsDecoded
	)

overrideprotectedvirtual

Parameters

rowsDecoded When the encoded image stream is incomplete, this function will return kIncompleteInput and rowsDecoded will be set to the number of scanlines that were successfully decoded. This will allow getPixels() to fill the uninitialized memory.

Implements SkCodec.

Definition at line 717 of file SkRawCodec.cpp.

                                                          {
    const int width = dstInfo.width();
    const int height = dstInfo.height();
    std::unique_ptr<dng_image> image(fDngImage->render(width, height));
    if (!image) {
        return kInvalidInput;
    }
 
    // Because the DNG SDK can not guarantee to render to requested size, we allow a small
    // difference. Only the overlapping region will be converted.
    const float maxDiffRatio = 1.03f;
    const dng_point& imageSize = image->Size();
    if (imageSize.h / (float) width > maxDiffRatio || imageSize.h < width ||
        imageSize.v / (float) height > maxDiffRatio || imageSize.v < height) {
        return SkCodec::kInvalidScale;
    }
 
    void* dstRow = dst;
    AutoTMalloc<uint8_t> srcRow(width * 3);
 
    dng_pixel_buffer buffer;
    buffer.fData = &srcRow[0];
    buffer.fPlane = 0;
    buffer.fPlanes = 3;
    buffer.fColStep = buffer.fPlanes;
    buffer.fPlaneStep = 1;
    buffer.fPixelType = ttByte;
    buffer.fPixelSize = sizeof(uint8_t);
    buffer.fRowStep = width * 3;
 
    constexpr auto srcFormat = skcms_PixelFormat_RGB_888;
    skcms_PixelFormat dstFormat;
    if (!sk_select_xform_format(dstInfo.colorType(), false, &dstFormat)) {
        return kInvalidConversion;
    }
 
    const skcms_ICCProfile* const srcProfile = this->getEncodedInfo().profile();
    skcms_ICCProfile dstProfileStorage;
    const skcms_ICCProfile* dstProfile = nullptr;
    if (auto cs = dstInfo.colorSpace()) {
        cs->toProfile(&dstProfileStorage);
        dstProfile = &dstProfileStorage;
    }
 
    for (int i = 0; i < height; ++i) {
        buffer.fArea = dng_rect(i, 0, i + 1, width);
 
        try {
            image->Get(buffer, dng_image::edge_zero);
        } catch (...) {
            *rowsDecoded = i;
            return kIncompleteInput;
        }
 
        if (!skcms_Transform(&srcRow[0], srcFormat, skcms_AlphaFormat_Unpremul, srcProfile,
                             dstRow,     dstFormat, skcms_AlphaFormat_Unpremul, dstProfile,
                             dstInfo.width())) {
            SkDebugf("failed to transform\n");
            *rowsDecoded = i;
            return kInternalError;
        }
 
        dstRow = SkTAddOffset<void>(dstRow, dstRowBytes);
    }
    return kSuccess;
}

◆ onGetScaledDimensions()

SkISize SkRawCodec::onGetScaledDimensions ( float desiredScale ) const

overrideprotectedvirtual

Reimplemented from SkCodec.

Definition at line 786 of file SkRawCodec.cpp.

                                                                  {
    SkASSERT(desiredScale <= 1.f);
 
    const SkISize dim = this->dimensions();
    SkASSERT(dim.fWidth != 0 && dim.fHeight != 0);
 
    if (!fDngImage->isScalable()) {
        return dim;
    }
 
    // Limits the minimum size to be 80 on the short edge.
    const float shortEdge = static_cast<float>(std::min(dim.fWidth, dim.fHeight));
    if (desiredScale < 80.f / shortEdge) {
        desiredScale = 80.f / shortEdge;
    }
 
    // For Xtrans images, the integer-factor scaling does not support the half-size scaling case
    // (stronger downscalings are fine). In this case, returns the factor "3" scaling instead.
    if (fDngImage->isXtransImage() && desiredScale > 1.f / 3.f && desiredScale < 1.f) {
        desiredScale = 1.f / 3.f;
    }
 
    // Round to integer-factors.
    const float finalScale = std::floor(1.f/ desiredScale);
    return SkISize::Make(static_cast<int32_t>(std::floor(dim.fWidth / finalScale)),
                         static_cast<int32_t>(std::floor(dim.fHeight / finalScale)));
}

◆ usesColorXform()

bool SkRawCodec::usesColorXform ( ) const

inlineoverrideprotectedvirtual

Reimplemented from SkCodec.

Definition at line 54 of file SkRawCodec.h.

54{ return false; }

The documentation for this class was generated from the following files:

third_party/skia/src/codec/SkRawCodec.h
third_party/skia/src/codec/SkRawCodec.cpp

Public Member Functions

Static Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ ~SkRawCodec()

Member Function Documentation

◆ MakeFromStream()

◆ onDimensionsSupported()

◆ onGetEncodedFormat()

◆ onGetPixels()

◆ onGetScaledDimensions()

◆ usesColorXform()