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pdftron::PDF::MonoImageSettings Class Reference

#include <Optimizer.h>

+ Inheritance diagram for pdftron::PDF::MonoImageSettings:

Public Types

enum  CompressionMode { e_jbig2, e_flate, e_none, e_ccitt }
enum  DownsampleMode { e_off, e_default }

Public Member Functions

 MonoImageSettings ()
void SetImageDPI (double maximum, double resampling)
void SetCompressionMode (enum CompressionMode mode)
void SetDownsampleMode (enum DownsampleMode mode)
void ForceRecompression (bool force)
void ForceChanges (bool force)
void SetJBIG2Threshold (double jbig2_threshold)

Detailed Description

A class that stores image downsampling/recompression settings for monochrome images.

Definition at line 153 of file Optimizer.h.

Member Enumeration Documentation


Definition at line 156 of file Optimizer.h.


Definition at line 164 of file Optimizer.h.

Constructor & Destructor Documentation

pdftron::PDF::MonoImageSettings::MonoImageSettings ( )

create an MonoImageSettings object with default options

Member Function Documentation

void pdftron::PDF::MonoImageSettings::ForceChanges ( bool  force)

Sets whether image changes that grow the PDF file should be kept. This is off by default.

forceif true all image changes will be kept.
void pdftron::PDF::MonoImageSettings::ForceRecompression ( bool  force)

Sets whether recompression to the specified compression method should be forced when the image is not downsampled. By default the compression method for these images will not be changed.

forceif true the compression method for all images will be changed to the specified compression mode
void pdftron::PDF::MonoImageSettings::SetCompressionMode ( enum CompressionMode  mode)

Sets the output compression mode for monochrome images The default value is e_ccitt (CCITT group 4 compression)

modethe compression mode to set
void pdftron::PDF::MonoImageSettings::SetDownsampleMode ( enum DownsampleMode  mode)

Sets the downsample mode for monochrome images The default value is e_default

modethe compression mode to set
void pdftron::PDF::MonoImageSettings::SetImageDPI ( double  maximum,
double  resampling 

Sets the maximum and resampling dpi for monochrome images. By default these are set to 144 and 96 respectively.

maximumthe highest dpi of an image before it will be resampled
resamplingthe image dpi to resample to if an image is encountered over the maximum dpi
void pdftron::PDF::MonoImageSettings::SetJBIG2Threshold ( double  jbig2_threshold)

Sets the quality for lossy compression modes from 1 to 10 where 10 is lossless (if possible). The default value for JBIG2 is 8.5. The setting is ignored for FLATE.

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