SkJpegBufferedSourceMgr Class Reference

Inheritance diagram for SkJpegBufferedSourceMgr:

Public Member Functions
	SkJpegBufferedSourceMgr (SkStream *stream, size_t bufferSize)
	~SkJpegBufferedSourceMgr () override
void	initSource (const uint8_t *&nextInputByte, size_t &bytesInBuffer) override
bool	fillInputBuffer (const uint8_t *&nextInputByte, size_t &bytesInBuffer) override
bool	skipInputBytes (size_t bytesToSkip, const uint8_t *&nextInputByte, size_t &bytesInBuffer) override
Public Member Functions inherited from SkJpegSourceMgr
virtual	~SkJpegSourceMgr ()
virtual void	initSource (const uint8_t *&nextInputByte, size_t &bytesInBuffer)=0
virtual bool	fillInputBuffer (const uint8_t *&nextInputByte, size_t &bytesInBuffer)=0
virtual bool	skipInputBytes (size_t bytes, const uint8_t *&nextInputByte, size_t &bytesInBuffer)=0

Additional Inherited Members
Static Public Member Functions inherited from SkJpegSourceMgr
static std::unique_ptr< SkJpegSourceMgr >	Make (SkStream *stream, size_t bufferSize=1024)
Protected Member Functions inherited from SkJpegSourceMgr
	SkJpegSourceMgr (SkStream *stream)
Protected Attributes inherited from SkJpegSourceMgr
SkStream *const	fStream

Detailed Description

Definition at line 123 of file SkJpegSourceMgr.cpp.

Constructor & Destructor Documentation

SkJpegBufferedSourceMgr()

SkJpegBufferedSourceMgr::SkJpegBufferedSourceMgr ( SkStream *  stream, size_t  bufferSize  )

inline

Definition at line 125 of file SkJpegSourceMgr.cpp.

                                                                 : SkJpegSourceMgr(stream) {
        fBuffer = SkData::MakeUninitialized(bufferSize);
    }

~SkJpegBufferedSourceMgr()

SkJpegBufferedSourceMgr::~SkJpegBufferedSourceMgr ( )

inlineoverride

Definition at line 128 of file SkJpegSourceMgr.cpp.

{}

Member Function Documentation

fillInputBuffer()

bool SkJpegBufferedSourceMgr::fillInputBuffer ( const uint8_t *&  nextInputByte, size_t &  bytesInBuffer  )

inlineoverridevirtual

Implements SkJpegSourceMgr.

Definition at line 134 of file SkJpegSourceMgr.cpp.

                                                                                        {
        size_t bytesRead = fStream->read(fBuffer->writable_data(), fBuffer->size());
        if (bytesRead == 0) {
            // Fail if we read zero bytes (libjpeg will accept any non-zero number of bytes).
            SkCodecPrintf("Hit end of file reading a buffered stream.\n");
            return false;
        }
        nextInputByte = fBuffer->bytes();
        bytesInBuffer = bytesRead;
        return true;
    }

initSource()

void SkJpegBufferedSourceMgr::initSource ( const uint8_t *&  nextInputByte, size_t &  bytesInBuffer  )

inlineoverridevirtual

Implements SkJpegSourceMgr.

Definition at line 130 of file SkJpegSourceMgr.cpp.

                                                                                   {
        nextInputByte = fBuffer->bytes();
        bytesInBuffer = 0;
    }

skipInputBytes()

bool SkJpegBufferedSourceMgr::skipInputBytes ( size_t  bytesToSkip, const uint8_t *&  nextInputByte, size_t &  bytesInBuffer  )

inlineoverridevirtual

Implements SkJpegSourceMgr.

Definition at line 145 of file SkJpegSourceMgr.cpp.

                                                        {
        // Skip through the already-read (or already in memory) buffer.
        if (bytesToSkip <= bytesInBuffer) {
            nextInputByte += bytesToSkip;
            bytesInBuffer -= bytesToSkip;
            return true;
        }
        bytesToSkip -= bytesInBuffer;
 
        // Fail if we skip past the end of the stream.
        if (fStream->skip(bytesToSkip) != bytesToSkip) {
            SkCodecPrintf("Failed to skip through buffered stream.\n");
            return false;
        }
 
        bytesInBuffer = 0;
        nextInputByte = fBuffer->bytes();
        return true;
    }

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

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