If it has been more than "nUpdateAutoDays" days since our last check for a recent update to the software, check the website for a newer version. - If

Scrape the header of the web page to determine if a newer version of the software is available. - No information is sent to the website other than the

Constructor for the Image Decoder - This constructor is called only once by Document class

Initialize the JFIF decoder. Several class pointers are provided as parameters, so that we can directly access the output log, the file buffer and the

Reset the DQT tables POST: - m_anImgDqtTbl[][] - m_anImgThumbDqt[][] - m_adImgDqtQual[] - m_abImgDqtSet[] - m_abImgDqtThumbSet[]

Clear the entire pixel image arrays for all three components (YCC) INPUT: - nWidth = Current allocated image width - nHeight = Current allocat

Report that application is finished to console This is an optional indicator to say that command-line operations have completed.

Color conversion from YCC to RGB - CC: y/cb/cr -> r/g/b INPUT: - nMcuX = MCU x coordinate - nMcuY = MCU y coordinate - sPix = Structure for

Color conversion from YCC to RGB INPUT: - sPix = Structure for color conversion OUTPUT: - sPix = Structure for color conversion

Color conversion from YCC to RGB INPUT: - sPix = Structure for color conversion OUTPUT: - sPix = Structure for color conversion

Attempt to create a double-buffer so that we can do our own resize function as the StretchDIBits() looks terrible for downsampling! NOTE: the followi

Default CreateClientItem() implementation

Recursively create directories as needed to create full path TODO: Should replace this by SHCreateDirectoryEx()

Constructor for WindowBuf class - Allocates storage for the buffer - Resets state - Clears all buffer overlay bytes

Write out a line to the log buffer if we are in verbose mode PRE: - m_bVerbose Verbose mode INPUT: - strLine String to output OUTPUT: - none

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Handle APP13 marker This includes: - Photoshop "Save As" and "Save for Web" quality settings - IPTC entries PRE: - m_nPos POST: - m_nImgQualPhotoshopS

Parser for APP2 FlashPix marker

Parser for APP2 ICC profile marker

Determine if the file is an AVI MJPEG. If so, parse the headers. TODO: Expand this function to use sub-functions for each block type

Decode the DHT marker segment (Huffman Tables) In some cases (such as for MotionJPEG), we fake out the DHT tables (when bInject=true) with a standard

Parse the embedded JPEG thumbnail. This routine is a much-reduced version of the main JFIF parser, in that it focuses primarily on the DQT tables.

Check return value of previous call. If failed, then ask user if they wish to continue decoding. If no, then flag to the decoder that we're done (avoi

Process all of the entries within an EXIF IFD directory This is used for the main EXIF IFDs as well as MakerNotes INPUT: - ifdStr The IFD section

Provide special output formatter for ICC Date/Time NOTE: It appears that the nParts had to be decoded in the reverse order from what I had expected, s

Start decoding a single ICC header segment @ nPos

Fixed point version of DecodeIdctCalcFloat() PRE: - m_anIdctLookup[][] - m_anDctBlock[] POST: - m_anIdctBlock[]

Perform IDCT Formula: See itu-t81.pdf, section A.3.3 s(yx) = 1/4*Sum(u=0..7)[ Sum(v=0..7)[ C(u) * C(v) * S(vu) cos( (2x+1)*u*Pi/16 ) * cos( (2y+1)*v

Clear input and output matrix POST: - m_anDctBlock[] - m_afIdctBlock[] - m_anIdctBlock[] - m_nDctCoefMax

Set the DCT matrix entry - Fills in m_anDctBlock[] with the unquantized coefficients - Reversing the quantization is done using m_anDqtCoeffZz[][] IN

Decode the IPTC metadata segment INPUT: nLen : Length of the 8BIM:IPTC resource data

Decode the IPTC metadata segment INPUT: nLen : Length of the 8BIM:IPTC resource data

Generate the custom-formatted string representing the IPTC field name and value INPUT: - eIptcType = Enumeration representing the IPTC field type

Generate the custom-formatted string representing the IPTC field name and value INPUT: - eIptcType = Enumeration representing the IPTC field type

Interpret the MakerNote header to determine any applicable MakerNote subtype. PRE: - m_strImgExifMake - buffer INPUT: - none RETURN: - Decode succe

Determine if the file is a Photoshop PSD If so, parse the headers. Generally want to start at start of file (nPos=0).

Reset the DC values in the decoder (e.g. at start and after restart markers) POST: - m_nDcLum - m_nDcChrCb - m_nDcChrCr - m_anDcLumCss[] - m_anDcChrC

Reset the decoder Scan Buff (at start of scan and after any restart markers) INPUT: - nFilePos = File position at start of scan - bRestart =

Decode a single component for one block of an MCU - Pull bits from the main buffer - Find matching huffman codes - Fill in the IDCT matrix (m_anDctBlo

Decode a single component for one block of an MCU with printing used for the Detailed Decode functionality - Same as DecodeScanComp() but adds reporti

Read two UINT32 from the buffer (8B) to create a formatted fraction string. Byte swap as required INPUT: - pos Buffer position RETURN: - Formatted

Read in 3 rational values from the buffer and output as a formatted GPS string INPUT: - pos Buffer position OUTPUT: - strCoord The formatted GPS st

Read two UINT32 from the buffer (8B) and interpret as a rational entry. Convert to floating point. Byte swap as required INPUT: - pos Buffer positio

Trap the end of the JPEGsnoop document in case we want to perform any other clearing actions.

Process any command-line operations

Placeholder code for command-line call to extract JPEGs

Extracts an embedded JPEG from the current file Also support extraction of all embedded JPEG from the file (default for non-interactive and optional i

Save the current log to text file with a simple implementation - This routine is implemented with a simple output mechanism rather than leveraging CR

Mark the image view as needing update - Will take effect on next "Reprocess" call.

Reprocess the current file - Invokes the Reprocess action in the Document - Ensures that the document is available first

Draw the histograms (RGB and/or Y) INPUT: - bQuiet = Calculate stats without reporting to log? - bDumpHistoY = Generate the Y histogram? PRE: -

Enable or disable the OK button

This routine is called after the expected fields of the marker segment have been processed. The file position should line up with the offset dictated

Check for restart marker and compare the index against expected PRE: - m_nScanBuffPtr RETURN: - Restart marker found at the current buffer position N

Export a subset of the file with no overlays or mods

Extract a specified number of bits from a 32-bit holding register INPUT: - nWord = The 32-bit holding register - nBits = Number of bits (leftmo

Locate a field ID in the constant 8BIM / Image Resource array INPUT: - nBimId = Image Resource ID (16-bit unsigned) OUTPUT: - nFldInd = Index in

Locate a field ID in the constant 8BIM / Image Resource array INPUT: - nBimId = Image Resource ID (16-bit unsigned) OUTPUT: - nFldInd = Index in

FindMenuItem() will find a menu item string from the specified popup menu and returns its position (0-based) in the specified popup menu. It returns -

Locate a field ID in the constant Meta Tag array INPUT: - nTagGroup = Meta Tag (High) - nTagElement = Meta Tag (Low) OUTPUT: - nFldInd = Inde

///////////// Free PIDL using shell's IMalloc

Recursive routine that searches for files and folders Used in batch file processing mode INPUT: - strSrcRootName Starting path for input files - str

Perform processing on file selected by the batch recursion process GenBatchFileListRecurse(). INPUT: - strSrcRootName Starting path for input files

Generate the Huffman code lookup table mask POST: - m_anHuffMaskLookup[]

Construct a lookup table for the Huffman code masks The result is a simple bit sequence of zeros followed by an increasing number of 1 bits. 00000000.

Retreive the currently active document (if it exists)