Types

DgBestCorrelateFunction		The signature for a correlation function.
DgCallocType		Type definition for a funtion that allocates memory.
DgContext_Logging		Public context data structure for messaging.
DgContext_Memory		Public context data structure for memory management.
DgCorrelateFunction		The signature for a correlation function.
DgDecodeParams		Structure that contains common decoding parameters.
DgDeleteType		Type definition for a funtion that deletes memory.
DgDestructor		Type definition for a destructor function.
DgEncodeParams		Structure that contains common encoding parameters.
DgEncoding		Abstract interface for a logical codec.
DgFileHandler		Abstract interface for image file i/o.
DgFindGlyphInfo_Geom		Type definition of a structure that holds detected geometry.
DgFreeParamType		Type definition for a destructor function.
DgFreeType		Type definition for a funtion that frees memory.
DgGlyph		Data structure to represent a bitmap glyph mark.
DgGlyphBlock		An object to represent a block of glyph marks.
DgGlyphImageReader		Abstract interface for reading glyph marks from an image.
DgGlyphImageWriter		Abstract interface for writing glyph marks into an image.
DgGlyphRegion		Structure that describes a region thought to contain a glyph block.
DgGlyphStreamWriter		Abstract interface for writing glyph marks to a stream.
DgGlyphTemplate		Template used to detect glyphs in an image.
DgGlyphTone		Type definition for an object that produces glyph toned images.
DgGlyphTone_ComparePixelType		Type definition of a function that sorts pixels.
DgGlyphTone_FindGlyphInfoType		Type definition of a function that detects the size and skew angle.
DgGlyphTone_Mark		Type definition of an object that specifies a glyphtone mark.
DgGlyphTone_ProcessDataType		Type definition of a function that pre-precess the encoded data.
DgGlyphTone_ProcessPixelType		Type definition of a function that pre-processes pixels.
DgGlyphTone_RenderCanonicalMarkType		Type definition of a function that renders canonical glyph marks.
DgGlyphTone_Threshold		Type definition for an threshold array used for halfone cells.
DgGlyphTone_Threshold_Data		Type definition for an object referenced by an object of...
DgImage		Public image data structure.
DgMallocType		Type definition for a funtion that allocates memory.
DgMutex		Data structure which represents a mutual exclusion lock.
DgMutex_DestroyType		Type definition of a mutex destructor.
DgMutex_InitType		Type definition of a mutex initialization function.
DgMutex_LockType		Type definition of a function that locks a mutex.
DgMutex_UnlockType		Type definition of a function that unlocks a mutex.
DgPrintType		Type definition for function used to output status messages.
DgReallocType		Type definition for a funtion that re-allocates memory.
DgRect		Structure used to represent a rectangular region.
DgReferencePoint		A reference point binds a logical glyph coordinate (u,v) to a...
DgRetainType		Type definition for a funtion that retains memory.
DgThread		Data structure which represents a thread.
DgThread_Context		Public context data structure for threading.
DgThread_ContextDestroyType		Type definition of a thread context destructor.
DgThread_ContextInitType		Type definition of a thread context initialization function.
DgThread_CreateType		Type definition of a function that creates a thread.
DgThread_FreeParamType		Type definition of a function that frees parameters.
DgThread_JoinType		Type definition of a function that waits for a thread to terminate.

Constants

dg500BlockEncoding		A DgEncoding for the DG500 block structure.
dgAC100BlockEncoding		DgEncodings for address carpets.
dgAsciiFontWriter		A DgGlyphStreamWriter for the standard dataglyph font.
dgBitSwappedBytes		A table of bytes where each entry is a bit-reversal of its index.
dgBmpHandler		A DgFileHandler that reads and writes BMP files.
dgContext_Logging_Default		Default implementation of a logging context.
dgContext_Memory_Default		Default implementation of a memory context.
dgEPSWriter		A DgGlyphStreamWriter for Encapsulated PostScript.
dgFaxImageReader		A DgGlyphImageReader that reads monochrome images of glyph blocks.
dgGlyphTone_DynamicRange_Default		Default output dynamic range for glyphtone.
dgGlyphTone_Mark_Ellipse		A DgGlyphTone_Mark ellipse-shaped.
dgGlyphTone_Mark_Ellipse_QZ		A DgGlyphTone_Mark that is an ellipse with quiet zone.
dgGlyphTone_Mark_Serpentine		A DgGlyphTone_Mark that is serpentine-shaped.
dgMonoImageAdaptiveReader		A DgGlyphImageReader particularly good for glyphtones.
dgMonoImageReader		A DgGlyphImageReader suitable for standard glyph blocks.
dgMonoImageWriter		A DgGlyphImageWriter for non-rotated, monochrome images.
dgPSWriter		A DgGlyphStreamWriter for PostScript.
dgRawBlockEncoding		A DgEncoding for raw glyph blocks.
dgRGBImageWriter		A DgGlyphImageWriter for non-rotated, color images.
dgSmallBlockEncoding		A DgEncoding for small glyph blocks.
dgThread_Context_Default		Default implementation of a threading context.
dgTiffHandler		A DgFileHandler that deals with TIFF files.

Functions

DgCalloc		Memory management function.
DgComputeCRC		Compute the 16-bit CRC-CCITT
DgContext_Check		Validate a context.
DgContext_Create		Create a new context.
DgContext_Destroy		Destroy a context.
DgDecodeBCH2014		Decode a word using 20/14 BCH encoding.
DgDecodeGlyphImage		Top-level function that decodes a dataglyph.
DgDecodeRS		Decode a Reed-Solomon message.
DgDecodeRSAggressive		Decode a Reed-Solomon message, aggressively.
DgDeinterleave		Deinterleave an array of data bytes.
DgDelete		Memory management function.
DgDetectGlyphs		Detect Glyphs marks in an image.
DgEncodeBCH2014		Encode a word using 20/14 BCH encoding.
DgEncodeGlyphImage		Top-level function that creates a dataglyph.
DgEncodeRS		Encode a message using a Reed-Solomon error-correcting encoding.
DgErrorName		Retrieve canonical error name from error number.
DgFindGlyphGeom		Detect the size and skew angle of glyph marks.
DgFindGlyphInfo		Detect the size and skew angle of glyph marks.
DgFindSeedPoint		Find a seed point in an image.
DgFree		Memory management function.
DgGetFileHandler		Match extension like '.bmp' to appropriate handler.
DgGetSignatureBytes		Return the signature bytes.
DgGlyphBlock_ApplyTone		Apply the image to the glyph block.
DgGlyphBlock_Create		Create a new glyph block buffer.
DgGlyphBlock_Destroy		Destroy a glyph block object.
DgGlyphBlock_EraseFoldedBytes		Record erasures.
DgGlyphBlock_Invert		Invert the sense of each valid glyph mark in the block.
DgGlyphBlock_New		Create a new glyph block object.
DgGlyphBlock_Print		Print the contents of a glyph block for debugging purposes.
DgGlyphBlock_Read		Read the contents of a glyph block from a stream.
DgGlyphBlock_ReadFoldedBytes		Read folded bytes from a glyph block.
DgGlyphBlock_Rotate180		Rotate the contents of a glyph block by 180 degrees.
DgGlyphBlock_Rotate90		Rotate the contents of a glyph block by 90 degrees.
DgGlyphBlock_SupportedPixelFormat		Lists types of images can we handle.
DgGlyphBlock_WriteFoldedBytes		Write folded bytes to a glyph block.
DgGlyphBlock_WriteRawBytes		Writes raw data to the output without further encoding.
DgGlyphTone_Delete		Delete a DgGlyphTone object.
DgGlyphTone_New		Create and constructed a new GlyphTone object.
DgGlyphTone_ProcessData		Pre-process the encoded data.
DgGlyphTone_RenderCanonicalMark		Create canonical (nominal) strokes for the glyphtone pattern.
DgGlyphTone_RenderTable		Render glyphs of varying thickness for use with glyphtones.
DgGlyphTone_SetCellSize		Set the cell size to a DgGlyphTone object.
DgGlyphTone_SetDynamicRange		Limit the dynamic range of the output.
DgGlyphTone_SetMark		Utilize a particuler glyphtone mark.
DgGlyphTone_SetTransferFunction		Set the transfer function for the output. We use a tabular function.
DgImage_AddConstant		Add a constant to the pixel values in a region.
DgImage_ComputeGrayContrast		Compute statistics over a small region of a grayscale image.
DgImage_ConvertMonoToGray		Convert a monochrome image to grayscale.
DgImage_Create		Create a new image.
DgImage_Destroy		Destroy an image.
DgImage_GetMonoPixelAddr		Given coordinates of a pixel in a monochrome image.
DgImage_GetSamplesPerPixel		Returns the number of samples per pixel.
DgImage_MakeSquarePixels		Make the pixels of an image approximately square.
DgImage_PrintRect		Print a small region of an image.
DgImage_Retain		Retain a reference of the image object.
DgImage_Shrink2		Shrink a binary image by a factor of two.
DgImage_StretchY		Stretch an image vertically.
DgInit		Initialize DataGlyph libraries.
DgInitWasCalled		Check if the toolbox has been properly initialized.
DgInterleave		Interleave an array of data bytes.
DgLayTile		Copy data from src to the destination.
DgMalloc		Memory management function.
DgMutex_Destroy		Deletes a mutual exclusion.
DgMutex_Init		Initialization of a mutex.
DgMutex_Lock		Attempt to acquire a mutual exclusion lock.
DgMutex_Unlock		Release a mutual exclusion lock held by the calling thread.
DgPortability_FileNo		Returns an integer as the "file descriptor".
DgPortability_SetFileMode		Set file translation mode (e.g. binary, ascii).
DgPrint		Print function appropriate to the context.
DgReadGlyphBlock		Top-level function that reads a block of glyph values from an image.
DgReadImageFile		Read an image from a file.
DgReadTile		Extract and assemble a tile.
DgReadTRCFile		Read a tone reproduction curve file.
DgRealloc		Memory management function.
DgRect_Offset		Offset the components of a rectangle.
DgRect_Set		Set the components of a rectangle.
DgRetain		Memory management function.
DgSecurity		Additional license key checking stage.
DgSetDefaultEncodeParams		Setup default values for encoding parameters.
DgSwapBytes16		Swap the order of bytes in a 16-bit word.
DgSwapBytes32		Swap the order of bytes in a 32-bit word.
DgThread_ContextDestroy		Destruction of a threading context.
DgThread_ContextInit		Initialization for a threading context.
DgThread_Create		Creates a thread that executes func(arg).
DgThread_Join		Waits for a thread to terminate.
DgTraverseImage		Traverse an image to read array of glyph marks. Starts from a seed.
DgWriteImageFile		Write an image to a file.