PDStreamFilterPrediction

Prediction filter. More...

Files
file	PDStreamFilterPrediction.h

Enumerations
enum	PDPredictorType {   PDPredictorNone = 1, PDPredictorTIFF2 = 2, PDPredictorPNG_NONE = 10, PDPredictorPNG_SUB = 11,   PDPredictorPNG_UP = 12, PDPredictorPNG_AVG = 13, PDPredictorPNG_PAE = 14, PDPredictorPNG_OPT = 15 }

Functions
PDStreamFilterRef	PDStreamFilterUnpredictionCreate (PDDictionaryRef options)
PDStreamFilterRef	PDStreamFilterPredictionConstructor (PDBool inputEnd, PDDictionaryRef options)

Detailed Description

Prediction filter.

Enumeration Type Documentation

enum PDPredictorType

Prediction filter type, i.e. which strategy to use.

Based on the PDF specification v 1.7, table 3.8, p. 76.

Enumerator
PDPredictorNone	no prediction (default)
PDPredictorTIFF2	TIFF predictor 2.
PDPredictorPNG_NONE	PNG prediction (on encoding, PNG None on all rows)
PDPredictorPNG_SUB	PNG prediction (on encoding, PNG Sub on all rows)
PDPredictorPNG_UP	PNG prediction (on encoding, PNG Up on all rows)
PDPredictorPNG_AVG	PNG prediction (on encoding, PNG Average on all rows)
PDPredictorPNG_PAE	PNG prediction (on encoding, PNG Paeth on all rows)
PDPredictorPNG_OPT	PNG prediction (on encoding, PNG Paeth on all rows)

Function Documentation

PDStreamFilterRef PDStreamFilterPredictionConstructor	(	PDBool	inputEnd,
		PDDictionaryRef	options
	)

Set up a stream filter for prediction based on inputEnd boolean.

PDStreamFilterRef PDStreamFilterUnpredictionCreate

(

PDDictionaryRef

options

)

Set up a stream filter for prediction. Set up stream filter for unprediction.