Foxit PDF SDK
FSDK.MonoImageSettings Class Reference

Public Member Functions

 constructor ()
 Constructor. More...
 
 IsEmpty ()
 Check whether current object is empty or not. More...
 
 SetCompressionMode (mode)
 Set compression mode used for optimizing monochrome images in a PDF document. More...
 
 SetImageDPI (dpi)
 Set the DPI value as the target compressed value for compressing monochrome images in a PDF document. More...
 
 SetImageDPILimit (dpi_limit)
 Set the lower limit DPI value for the monochrome image to decide if the image is to be compressed in a PDF document. More...
 
 SetQuality (quality)
 Set compression quality, used for optimizing monochrome images in a PDF document. More...
 
 SetStretchMode (mode)
 Set stretch mode used for optimizing monochrome images in a PDF document. More...
 

Static Public Attributes

static e_ImageCompressCCITT3
 Enumeration for compression mode used for monochrome image. More...
 
static e_ImageCompressCCITT4
 Compression mode: CCITT Group 4.
 
static e_ImageCompressHigh
 Compression mode: high.
 
static e_ImageCompressjbig2
 Compression mode: jbig2.
 
static e_ImageCompressQualityLossless
 Enumeration for compression quality used for monochrome image. More...
 
static e_ImageCompressQualityLossy
 Compression quality: Lossy.
 
static e_ImageCompressRetain
 Compression mode: retain, which means no compression.
 
static e_ImageCompressRunLength
 Compression mode: run-length.
 
static e_StretchBicubic
 When this is set, that means to do bicubic interpolation for zooming.
 
static e_StretchDefault
 Enumeration for stretch mode. More...
 
static e_StretchDownsample
 When this is set, that means not to do halftone for shrinking or rotating.
 
static e_StretchInterpol
 When this is set, that means to do interpolation for zooming.
 
static e_StretchNoSmooth
 When this is set, that means not to do any interpolation for stretching.
 
static e_StretchOff
 When this is set, that means to do without stretching.
 

Detailed Description

This class represents downsampling/recompression settings for monochrome images. This class object can be set to class FSDK.OptimizerSettings and then be used to optimize a PDF document.

See also
FSDK.OptimizerSettings

Member Function Documentation

◆ constructor()

FSDK.MonoImageSettings.constructor ( )

Constructor.

This constructor is to construct a monochrome image settings object with default setting options. User can also call "set" methods in this class to change these setting options. Please refer to comment of these "set" methods for more details about default values.

◆ IsEmpty()

FSDK.MonoImageSettings.IsEmpty ( )

Check whether current object is empty or not.

When the current object is empty, that means current object is useless.

Returns
true means current object is empty, while false means not.

◆ SetCompressionMode()

FSDK.MonoImageSettings.SetCompressionMode ( mode  )

Set compression mode used for optimizing monochrome images in a PDF document.

For a newly constructed object, if this function is not called to set option, that means to use FSDK.ImageSettings.e_ImageCompressCCITT4 as the default value of this option.

Parameters
[in]modeImage compression mode. Please refer to values starting from FSDK.ImageSettings.e_ImageCompressHigh and this should be one of these values.
Returns
None.

◆ SetImageDPI()

FSDK.MonoImageSettings.SetImageDPI ( dpi  )

Set the DPI value as the target compressed value for compressing monochrome images in a PDF document.

When an image can be compressed, the resolution of this image will be compressed to the DPI value set by current function.
For a newly constructed object, if this function is not called to set option, that means to use 250 as the default value of this option.

Parameters
[in]dpiDPI value. If the images can be compressed, the resolution of these images will be compressed to this value.
Returns
None.

◆ SetImageDPILimit()

FSDK.MonoImageSettings.SetImageDPILimit ( dpi_limit  )

Set the lower limit DPI value for the monochrome image to decide if the image is to be compressed in a PDF document.

If the resolution of an image in the PDF document is above the lower limit DPI value, this image will be compressed to the target compressed DPI value which is set by function FSDK.ImageSettings.SetImageDPI.
For a newly constructed object, if this function is not called to set option, that means a DPI value (which is 1.5 times of target compressed DPI value) will be used as the default value of this option.

Parameters
[in]dpi_limitDPI value as the lower limit. This value should be a positive number. Suggested range: bigger than target compressed DPI value (set by function FSDK.ImageSettings.SetImageDPI) and the maximum value is 10 times of target compressed DPI value.
If input value is not bigger than the target compressed DPI value, a DPI value which is one more than the target compressed DPI value will be used instead.
If input value is bigger than the maximum value, the maximum value value will be used instead.
Returns
None.

◆ SetQuality()

FSDK.MonoImageSettings.SetQuality ( quality  )

Set compression quality, used for optimizing monochrome images in a PDF document.

For a newly constructed object, if this function is not called to set this option, that means to use FSDK.ImageSettings.e_ImageCompressQualityLossless as the default value of this option.

Parameters
[in]qualityCompression quality. Please refer to values starting from FSDK.ImageSettings.e_ImageCompressQualityLossless and this should be one of these values.
Returns
None.

◆ SetStretchMode()

FSDK.MonoImageSettings.SetStretchMode ( mode  )

Set stretch mode used for optimizing monochrome images in a PDF document.

For a newly constructed object, if this function is not called to set this option, that means to use FSDK.ImageSettings.e_StretchBicubic as the default value of this option.

Parameters
[in]modeStretch mode. Please refer to values starting from FSDK.ImageSettings.e_StretchOff and this should be one of these values.
Returns
None.

Member Data Documentation

◆ e_ImageCompressCCITT3

FSDK.MonoImageSettings.e_ImageCompressCCITT3
static

Enumeration for compression mode used for monochrome image.

Values of this enumeration should be used alone.

Compression mode: CCITT Group 3.

◆ e_ImageCompressQualityLossless

FSDK.MonoImageSettings.e_ImageCompressQualityLossless
static

Enumeration for compression quality used for monochrome image.

Values of this enumeration should be used alone.

Compression quality: Lossless.

◆ e_StretchDefault

FSDK.MonoImageSettings.e_StretchDefault
static

Enumeration for stretch mode.

Values of this enumeration should be used alone.

When this is set, that means to do default stretching.