SkDngImage Class Reference

Public Member Functions
dng_image *	render (int width, int height)
int	width () const
int	height () const
bool	isScalable () const
bool	isXtransImage () const

Static Public Member Functions
static SkDngImage *	NewFromStream (SkRawStream *stream)
static bool	IsTiffHeaderValid (SkRawStream *stream)

Detailed Description

Definition at line 456 of file SkRawCodec.cpp.

Member Function Documentation

height()

int SkDngImage::height ( ) const

inline

Definition at line 539 of file SkRawCodec.cpp.

                       {
        return fHeight;
    }

isScalable()

bool SkDngImage::isScalable ( ) const

inline

Definition at line 543 of file SkRawCodec.cpp.

                            {
        return fIsScalable;
    }

IsTiffHeaderValid()

static bool SkDngImage::IsTiffHeaderValid ( SkRawStream *  stream )

inlinestatic

Definition at line 553 of file SkRawCodec.cpp.

                                                       {
        const size_t kHeaderSize = 4;
        unsigned char header[kHeaderSize];
        if (!stream->read(header, 0 /* offset */, kHeaderSize)) {
            return false;
        }
 
        // Check if the header is valid (endian info and magic number "42").
        bool littleEndian;
        if (!is_valid_endian_marker(header, &littleEndian)) {
            return false;
        }
 
        return 0x2A == get_endian_short(header + 2, littleEndian);
    }

isXtransImage()

bool SkDngImage::isXtransImage ( ) const

inline

Definition at line 547 of file SkRawCodec.cpp.

                               {
        return fIsXtransImage;
    }

NewFromStream()

static SkDngImage * SkDngImage::NewFromStream ( SkRawStream *  stream )

inlinestatic

Definition at line 464 of file SkRawCodec.cpp.

                                                          {
        std::unique_ptr<SkDngImage> dngImage(new SkDngImage(stream));
#if defined(SK_BUILD_FOR_LIBFUZZER)
        // Libfuzzer easily runs out of memory after here. To avoid that
        // We just pretend all streams are invalid. Our AFL-fuzzer
        // should still exercise this code; it's more resistant to OOM.
        return nullptr;
#else
        if (!dngImage->initFromPiex() && !dngImage->readDng()) {
            return nullptr;
        }
 
        return dngImage.release();
#endif
    }

render()

dng_image * SkDngImage::render ( int  width, int  height  )

inline

Definition at line 488 of file SkRawCodec.cpp.

                                             {
        if (!fHost || !fInfo || !fNegative || !fDngStream) {
            if (!this->readDng()) {
                return nullptr;
            }
        }
 
        // DNG SDK preserves the aspect ratio, so it only needs to know the longer dimension.
        const int preferredSize = std::max(width, height);
        try {
            // render() takes ownership of fHost, fInfo, fNegative and fDngStream when available.
            std::unique_ptr<dng_host> host(fHost.release());
            std::unique_ptr<dng_info> info(fInfo.release());
            std::unique_ptr<dng_negative> negative(fNegative.release());
            std::unique_ptr<dng_stream> dngStream(fDngStream.release());
 
            host->SetPreferredSize(preferredSize);
            host->ValidateSizes();
 
            negative->ReadStage1Image(*host, *dngStream, *info);
 
            if (info->fMaskIndex != -1) {
                negative->ReadTransparencyMask(*host, *dngStream, *info);
            }
 
            negative->ValidateRawImageDigest(*host);
            if (negative->IsDamaged()) {
                return nullptr;
            }
 
            const int32 kMosaicPlane = -1;
            negative->BuildStage2Image(*host);
            negative->BuildStage3Image(*host, kMosaicPlane);
 
            dng_render render(*host, *negative);
            render.SetFinalSpace(dng_space_sRGB::Get());
            render.SetFinalPixelType(ttByte);
 
            dng_point stage3_size = negative->Stage3Image()->Size();
            render.SetMaximumSize(std::max(stage3_size.h, stage3_size.v));
 
            return render.Render();
        } catch (...) {
            return nullptr;
        }
    }

width()

int SkDngImage::width ( ) const

inline

Definition at line 535 of file SkRawCodec.cpp.

                      {
        return fWidth;
    }

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

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