Class Image

Image class provides common methods for working with PDF images.

Inheritance

System.Object

Image

Implements

System.IDisposable

Inherited Members

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.ToString()

Namespace: pdftron.PDF

Assembly: PDFTronDotNet.dll

Syntax

public class Image : IDisposable

Remarks

PDF.Element contains a similar interface used to access image data. To create the Image object from image PDF.Element, pass the Element's SDF/Cos dictionary to Image constructor (i.e. Image image(element->GetXObject()) )

Constructors

Image(Obj)

Create an image from an existing image represented as a SDF/Cos object.

Declaration

public Image(Obj image_xobject)

Parameters

Type	Name	Description
Obj	image_xobject	the image_xobject

Remarks

To create the Image object from image PDF.Element, pass the Element's SDF/Cos dictionary to Image constructor (i.e. Image image(element->GetXObject()))

Methods

Create(SDFDoc, Filter)

Declaration

public static Image Create(SDFDoc doc, Filter stream)

Parameters

Type	Name	Description
SDFDoc	doc
Filter	stream

Returns

Type	Description
Image

Create(SDFDoc, Filter, Obj)

Directly embed the image that is already compressed using the Image.InputFilter format. The function can be used to pass-through pre-compressed image data.

Declaration

public static Image Create(SDFDoc doc, Filter stream, Obj encoder_hints)

Parameters

Type	Name	Description
SDFDoc	doc	A document to which the image should be added. The 'Doc' object can be obtained using Obj.GetDoc() or PDFDoc.GetSDFDoc().
Filter	stream	input stream containing a serialized document. The input stream may be a random-access file, memory buffer, slow HTTP connection etc.
Obj	encoder_hints	The encoder hints

Returns

Type	Description
Image	PDF.Image object representing the embedded image.

Remarks

if the input stream doesn't support Seek() operation the document will load whole data stream in memory before parsing.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

Create(SDFDoc, FilterReader, Int32, Int32, Int32, ColorSpace)

Create and embed an Image. Embed the raw image data taking into account specified compression hints.

By default the function will compress all images using Flate compression. It is possible to fine tune compression or to select a different compression algorithm using 'encoder_hints' object.

Declaration

public static Image Create(SDFDoc doc, FilterReader image_data, int width, int height, int bpc, ColorSpace color_space)

Parameters

Type	Name	Description
SDFDoc	doc	A document to which the image should be added. The 'Doc' object can be obtained using Obj.GetDoc() or PDFDoc.GetSDFDoc().
FilterReader	image_data	The stream or buffer containing image data. The image data must not be compressed and must follow PDF format for sample representation (please refer to section 4.8.2 'Sample Representation' in PDF Reference Manual for details).
System.Int32	width	The width of the image, in samples.
System.Int32	height	The height of the image, in samples.
System.Int32	bpc	The number of bits used to represent each color component.
ColorSpace	color_space	The color space in which image samples are represented.

Returns

Type	Description
Image	PDF.Image object representing the embedded image.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

Create(SDFDoc, FilterReader, Int32, Int32, Int32, ColorSpace, Image.InputFilter)

Create and embed an Image. Embed the raw image data taking into account specified compression hints.

By default the function will compress all images using Flate compression. It is possible to fine tune compression or to select a different compression algorithm using 'encoder_hints' object.

Declaration

public static Image Create(SDFDoc doc, FilterReader image_data, int width, int height, int bpc, ColorSpace color_space, Image.InputFilter input_format)

Parameters

Type	Name	Description
SDFDoc	doc	A document to which the image should be added. The 'Doc' object can be obtained using Obj.GetDoc() or PDFDoc.GetSDFDoc().
FilterReader	image_data	The stream or buffer containing image data. The image data must not be compressed and must follow PDF format for sample representation (please refer to section 4.8.2 'Sample Representation' in PDF Reference Manual for details).
System.Int32	width	The width of the image, in samples.
System.Int32	height	The height of the image, in samples.
System.Int32	bpc	The number of bits used to represent each color component.
ColorSpace	color_space	The color space in which image samples are represented.
Image.InputFilter	input_format	Image.InputFilter describing the format of pre-compressed image data.

Returns

Type	Description
Image	PDF.Image object representing the embedded image.

Remarks

see the above method for details.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

Create(SDFDoc, FilterReader, Int32, Int32, Int32, ColorSpace, Obj)

Create and embed an Image. Embed the raw image data taking into account specified compression hints.

By default the function will compress all images using Flate compression. It is possible to fine tune compression or to select a different compression algorithm using 'encoder_hints' object.

Declaration

public static Image Create(SDFDoc doc, FilterReader image_data, int width, int height, int bpc, ColorSpace color_space, Obj encoder_hints)

Parameters

Type	Name	Description
SDFDoc	doc	A document to which the image should be added. The 'Doc' object can be obtained using Obj.GetDoc() or PDFDoc.GetSDFDoc().
FilterReader	image_data	The stream or buffer containing image data. The image data must not be compressed and must follow PDF format for sample representation (please refer to section 4.8.2 'Sample Representation' in PDF Reference Manual for details).
System.Int32	width	The width of the image, in samples.
System.Int32	height	The height of the image, in samples.
System.Int32	bpc	The number of bits used to represent each color component.
ColorSpace	color_space	The color space in which image samples are represented.
Obj	encoder_hints	The encoder hints

Returns

Type	Description
Image	PDF.Image object representing the embedded image.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

Create(SDFDoc, Byte[])

Declaration

public static Image Create(SDFDoc doc, byte[] image_data)

Parameters

Type	Name	Description
SDFDoc	doc
System.Byte[]	image_data

Returns

Type	Description
Image

Create(SDFDoc, Byte[], Obj)

Directly embed the image that is already compressed using the Image.InputFilter format. The function can be used to pass-through pre-compressed image data.

Declaration

public static Image Create(SDFDoc doc, byte[] image_data, Obj encoder_hints)

Parameters

Type	Name	Description
SDFDoc	doc	A document to which the image should be added. The 'Doc' object can be obtained using Obj.GetDoc() or PDFDoc.GetSDFDoc().
System.Byte[]	image_data	The stream or buffer containing compressed image data. The compression format must match the input_format parameter.
Obj	encoder_hints	The encoder hints

Returns

Type	Description
Image	PDF.Image object representing the embedded image.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

Create(SDFDoc, Byte[], Int32, Int32, Int32, ColorSpace)

Directly embed the image that is already compressed using the Image.InputFilter format. The function can be used to pass-through pre-compressed image data.

Declaration

public static Image Create(SDFDoc doc, byte[] image_data, int width, int height, int bpc, ColorSpace color_space)

Parameters

Type	Name	Description
SDFDoc	doc	A document to which the image should be added. The 'Doc' object can be obtained using Obj.GetDoc() or PDFDoc.GetSDFDoc().
System.Byte[]	image_data	The stream or buffer containing compressed image data. The compression format must match the input_format parameter.
System.Int32	width	The width of the image, in samples.
System.Int32	height	The height of the image, in samples.
System.Int32	bpc	The number of bits used to represent each color component.
ColorSpace	color_space	The color space in which image samples are specified.

Returns

Type	Description
Image	PDF.Image object representing the embedded image.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

Create(SDFDoc, Byte[], Int32, Int32, Int32, ColorSpace, Image.InputFilter)

Directly embed the image that is already compressed using the Image.InputFilter format. The function can be used to pass-through pre-compressed image data.

Declaration

public static Image Create(SDFDoc doc, byte[] image_data, int width, int height, int bpc, ColorSpace color_space, Image.InputFilter input_format)

Parameters

Type	Name	Description
SDFDoc	doc	A document to which the image should be added. The 'Doc' object can be obtained using Obj.GetDoc() or PDFDoc.GetSDFDoc().
System.Byte[]	image_data	The stream or buffer containing compressed image data. The compression format must match the input_format parameter.
System.Int32	width	The width of the image, in samples.
System.Int32	height	The height of the image, in samples.
System.Int32	bpc	The number of bits used to represent each color component.
ColorSpace	color_space	The color space in which image samples are specified.
Image.InputFilter	input_format	Image.InputFilter describing the format of pre-compressed image data.

Returns

Type	Description
Image	PDF.Image object representing the embedded image.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

Create(SDFDoc, Byte[], Int32, Int32, Int32, ColorSpace, Obj)

Directly embed the image that is already compressed using the Image.InputFilter format. The function can be used to pass-through pre-compressed image data.

Declaration

public static Image Create(SDFDoc doc, byte[] image_data, int width, int height, int bpc, ColorSpace color_space, Obj encoder_hints)

Parameters

Type	Name	Description
SDFDoc	doc	A document to which the image should be added. The 'Doc' object can be obtained using Obj.GetDoc() or PDFDoc.GetSDFDoc().
System.Byte[]	image_data	The stream or buffer containing compressed image data. The compression format must match the input_format parameter.
System.Int32	width	The width of the image, in samples.
System.Int32	height	The height of the image, in samples.
System.Int32	bpc	The number of bits used to represent each color component.
ColorSpace	color_space	The color space in which image samples are specified.
Obj	encoder_hints	The encoder hints

Returns

Type	Description
Image	PDF.Image object representing the embedded image.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

Create(SDFDoc, Stream)

Declaration

public static Image Create(SDFDoc doc, Stream stream)

Parameters

Type	Name	Description
SDFDoc	doc
System.IO.Stream	stream

Returns

Type	Description
Image

Create(SDFDoc, Stream, Obj)

Declaration

public static Image Create(SDFDoc doc, Stream stream, Obj encoder_hints)

Parameters

Type	Name	Description
SDFDoc	doc
System.IO.Stream	stream
Obj	encoder_hints

Returns

Type	Description
Image

Create(SDFDoc, String)

Create and embed an Image from an external file.

Declaration

public static Image Create(SDFDoc doc, string filename)

Parameters

Type	Name	Description
SDFDoc	doc	A document to which the image should be added. To obtain SDF.Doc from PDFDoc use PDFDoc.GetSDFDoc() or Obj.GetDoc().
System.String	filename	The name of the image file. Currently supported formats are JPEG, PNG, GIF, TIFF, BMP, EMF, and WMF. Other raster formats can be embedded by decompressing image data and using other versions of Image.Create(...) method.

Returns

Type	Description
Image	PDF.Image object representing the embedded image.

Remarks

By default the function will either pass-through data preserving the original compression or will compress data using Flate compression. It is possible to fine tune compression or to select a different compression algorithm using 'encoder_hints' object.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

Create(SDFDoc, String, Obj)

Create and embed an Image from an external file taking into account specified compression hints.

Declaration

public static Image Create(SDFDoc doc, string filename, Obj encoder_hints)

Parameters

Type	Name	Description
SDFDoc	doc	A document to which the image should be added. To obtain SDF.Doc from PDFDoc use PDFDoc.GetSDFDoc() or Obj.GetDoc().
System.String	filename	The name of the image file. Currently supported formats are JPEG, PNG, GIF, TIFF, BMP, EMF, and WMF. Other raster formats can be embedded by decompressing image data and using other versions of Image.Create(...) method.
Obj	encoder_hints	An optional SDF.Obj containing a hint (or an SDF.Array of hints) that could be used to select a specific compression method and compression parameters. For a concrete example of how to create encoder hints, please take a look at JBIG2Test and AddImage sample projects. The image encoder accepts the following hints: - /JBIG2; SDF.Name("JBIG2"), An SDF.Name Object with value equal to "JBIG2". If the image is monochrome (i.e. bpc == 1), the encoder will compress the image using JBIG2Decode filter. Note that JBIG2 compression is not recommended for use on scanned text/financial documents or equivalent since its lossless nature can lead to similar looking numbers or characters being replaced. - [/JBIG2 /Threshold 0.6 /SharePages 50] - Compress a monochrome image using lossy JBIG2Decode compression with the given image threshold and by sharing segments from a specified number of pages. The threshold is a floating point number in the rage from 0.4 to 0.9. Increasing the threshold value will increase image quality, but may increase the file size. The default value for threshold is 0.85. "SharePages" parameter can be used to specify the maximum number of pages sharing a common 'JBIG2Globals' segment stream. Increasing the value of this parameter improves compression ratio at the expense of memory usage. - /CCITT; Compress a monochrome (i.e. bpc == 1) image using CCITT Group 4 compression. This algorithm typically produces larger output than JBIG2, but is lossless. This makes it much more suitable for scanned text documents. CCITT is the best option for more general monochrome compression use cases, since JBIG2 has potential to change image content. - [/JPEG] - Use JPEG compression with default compression. - [/JPEG /Quality 60] - Use JPEG compression with given quality setting. The "Quality" value is expressed on the 0..100 scale. - [/JPEG2000] - Use JPEG2000 compression to compress a RGB or a grayscale image. - [/JP2] - Use JPEG2000 compression with JP2 encoding. JP2 does not support CMYK images. - [/Flate] - Use Flate compression with maximum compression at the expense of speed. - [/Flate /Level 9] - Use Flate compression using specified compression level. Compression "Level" must be a number between 0 and 9: 1 gives best speed, 9 gives best compression, 0 gives no compression at all (the input data is simply copied a block at a time). - /RAW or [/RAW] - The encoder will not use any compression method and the image will be stored in the raw format.

Returns

Type	Description
Image	PDF.Image object representing the embedded image.

Remarks

By default the function will either pass-through data preserving the original compression or will compress data using Flate compression. It is possible to fine tune compression or to select a different compression algorithm using 'encoder_hints' object.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

CreateImageMask(SDFDoc, FilterReader, Int32, Int32)

Create and embed an ImageMask. Embed the raw image data taking into account specified compression hints. The ImageMask can be used as a stencil mask for painting in the current color or as an explicit mask specifying which areas of the image to paint and which to mask out. One of the most important uses of stencil masking is for painting character glyphs represented as bitmaps.

Declaration

public static Image CreateImageMask(SDFDoc doc, FilterReader image_data, int width, int height)

Parameters

Type	Name	Description
SDFDoc	doc	A document to which the image should be added. The 'Doc' object can be obtained using Obj.GetDoc() or PDFDoc.GetSDFDoc().
FilterReader	image_data	The stream or buffer containing image data stored in 1 bit per sample format. The image data must not be compressed and must follow PDF format for sample representation (please refer to section 4.8.2 'Sample Representation' in PDF Reference Manual for details).
System.Int32	width	The width of the image, in samples.
System.Int32	height	The height of the image, in samples.

Returns

Type	Description
Image	PDF.Image object representing the embedded ImageMask.

Remarks

see Image.CreateImageMask for details.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

CreateImageMask(SDFDoc, FilterReader, Int32, Int32, Obj)

Create and embed an ImageMask. Embed the raw image data taking into account specified compression hints. The ImageMask can be used as a stencil mask for painting in the current color or as an explicit mask specifying which areas of the image to paint and which to mask out. One of the most important uses of stencil masking is for painting character glyphs represented as bitmaps.

Declaration

public static Image CreateImageMask(SDFDoc doc, FilterReader image_data, int width, int height, Obj encoder_hints)

Parameters

Type	Name	Description
SDFDoc	doc	A document to which the image should be added. The 'Doc' object can be obtained using Obj.GetDoc() or PDFDoc.GetSDFDoc().
FilterReader	image_data	The stream or buffer containing image data stored in 1 bit per sample format. The image data must not be compressed and must follow PDF format for sample representation (please refer to section 4.8.2 'Sample Representation' in PDF Reference Manual for details).
System.Int32	width	The width of the image, in samples.
System.Int32	height	The height of the image, in samples.
Obj	encoder_hints	The encoder hints

Returns

Type	Description
Image	PDF.Image object representing the embedded ImageMask.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

CreateImageMask(SDFDoc, Byte[], Int32, Int32)

Create and embed an ImageMask. Embed the raw image data taking into account specified compression hints. The ImageMask can be used as a stencil mask for painting in the current color or as an explicit mask specifying which areas of the image to paint and which to mask out. One of the most important uses of stencil masking is for painting character glyphs represented as bitmaps.

Declaration

public static Image CreateImageMask(SDFDoc doc, byte[] image_data, int width, int height)

Parameters

Type	Name	Description
SDFDoc	doc	A document to which the image should be added. The 'Doc' object can be obtained using Obj.GetDoc() or PDFDoc.GetSDFDoc().
System.Byte[]	image_data	The stream or buffer containing image data stored in 1 bit per sample format. The image data must not be compressed and must follow PDF format for sample representation (please refer to section 4.8.2 'Sample Representation' in PDF Reference Manual for details).
System.Int32	width	The width of the image, in samples.
System.Int32	height	The height of the image, in samples.

Returns

Type	Description
Image	PDF.Image object representing the embedded ImageMask.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

CreateImageMask(SDFDoc, Byte[], Int32, Int32, Obj)

Create and embed an ImageMask. Embed the raw image data taking into account specified compression hints. The ImageMask can be used as a stencil mask for painting in the current color or as an explicit mask specifying which areas of the image to paint and which to mask out. One of the most important uses of stencil masking is for painting character glyphs represented as bitmaps.

Declaration

public static Image CreateImageMask(SDFDoc doc, byte[] image_data, int width, int height, Obj encoder_hints)

Parameters

Type	Name	Description
SDFDoc	doc	A document to which the image should be added. The 'Doc' object can be obtained using Obj.GetDoc() or PDFDoc.GetSDFDoc().
System.Byte[]	image_data	The stream or buffer containing image data stored in 1 bit per sample format. The image data must not be compressed and must follow PDF format for sample representation (please refer to section 4.8.2 'Sample Representation' in PDF Reference Manual for details).
System.Int32	width	The width of the image, in samples.
System.Int32	height	The height of the image, in samples.
Obj	encoder_hints	The encoder hints

Returns

Type	Description
Image	PDF.Image object representing the embedded ImageMask.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

CreateSoftMask(SDFDoc, FilterReader, Int32, Int32, Int32)

Create and embed a Soft Mask. Embed the raw image data taking into account specified compression hints.

Declaration

public static Image CreateSoftMask(SDFDoc doc, FilterReader image_data, int width, int height, int bpc)

Parameters

Type	Name	Description
SDFDoc	doc	A document to which the image should be added. The 'Doc' object can be obtained using Obj.GetDoc() or PDFDoc.GetSDFDoc().
FilterReader	image_data	The stream or buffer containing image data represented in DeviceGray color space (i.e. one component per sample). The image data must not be compressed and must follow PDF format for sample representation (please refer to section 4.8.2 'Sample Representation' in PDF Reference Manual for details).
System.Int32	width	The width of the image, in samples.
System.Int32	height	The height of the image, in samples.
System.Int32	bpc	The number of bits used to represent each color component.

Returns

Type	Description
Image	the image

Remarks

this feature is available only in PDF 1.4 and higher.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

CreateSoftMask(SDFDoc, FilterReader, Int32, Int32, Int32, Obj)

Creates the soft mask.

Declaration

public static Image CreateSoftMask(SDFDoc doc, FilterReader image_data, int width, int height, int bpc, Obj encoder_hints)

Parameters

Type	Name	Description
SDFDoc	doc	the doc
FilterReader	image_data	the image_data
System.Int32	width	the width
System.Int32	height	the height
System.Int32	bpc	the bpc
Obj	encoder_hints	the encoder_hint

Returns

Type	Description
Image	the image

Remarks

see Image.CreateSoftMask for details.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

CreateSoftMask(SDFDoc, Byte[], Int32, Int32, Int32)

Create and embed a Soft Mask. Embed the raw image data taking into account specified compression hints.

Declaration

public static Image CreateSoftMask(SDFDoc doc, byte[] image_data, int width, int height, int bpc)

Parameters

Type	Name	Description
SDFDoc	doc	the doc
System.Byte[]	image_data	the image_data
System.Int32	width	the width
System.Int32	height	the height
System.Int32	bpc	the bpc

Returns

Type	Description
Image	the image

Remarks

see Image.CreateSoftMask for details.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

CreateSoftMask(SDFDoc, Byte[], Int32, Int32, Int32, Obj)

Create and embed a Soft Mask. Embed the raw image data taking into account specified compression hints.

Declaration

public static Image CreateSoftMask(SDFDoc doc, byte[] image_data, int width, int height, int bpc, Obj encoder_hints)

Parameters

Type	Name	Description
SDFDoc	doc	A document to which the image should be added. The 'Doc' object can be obtained using Obj.GetDoc() or PDFDoc.GetSDFDoc().
System.Byte[]	image_data	The stream or buffer containing image data represented in DeviceGray color space (i.e. one component per sample). The image data must not be compressed and must follow PDF format for sample representation (please refer to section 4.8.2 'Sample Representation' in PDF Reference Manual for details).
System.Int32	width	The width of the image, in samples.
System.Int32	height	The height of the image, in samples.
System.Int32	bpc	The number of bits used to represent each color component.
Obj	encoder_hints	An optional parameter that can be used to fine tune compression or to select a different compression algorithm. See Image.Create() for details.

Returns

Type	Description
Image	the image

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

Dispose()

Declaration

public void Dispose()

Dispose(Boolean)

Declaration

protected virtual void Dispose(bool disposing)

Parameters

Type	Name	Description
System.Boolean	disposing

Export(FilterWriter)

Saves this image to the output stream.

Declaration

public int Export(FilterWriter writer)

Parameters

Type	Name	Description
FilterWriter	writer	A pointer to FilterWriter used to write to the output stream. If the parameter is null, nothing will be written to the output stream, but the function returns the format identifier.

Returns

Type	Description
System.Int32	the number indicating the selected image format: (0 - PNG, 1 - TIF, 2 - JPEG).

Remarks

see the overloaded Image.Export method for more information.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

Export(String)

Saves this image to a file.

The output image format (TIFF, JPEG, or PNG) will be automatically selected based on the properties of the embedded image. For example, if the embedded image is using CCITT Fax compression, the output format will be TIFF. Similarly, if the embedded image is using JPEG compression the output format will be JPEG. If your application needs to explicitly control output image format you may want to use ExportAsTiff() or ExportAsPng().

Declaration

public int Export(string filename)

Parameters

Type	Name	Description
System.String	filename	string that specifies the path name for the saved image. The filename should not include the extension which will be appended to the filename string based on the output format.

Returns

Type	Description
System.Int32	the number indicating the selected image format: (0 - PNG, 1 - TIF, 2 - JPEG).

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

ExportAsPng(FilterWriter)

Saves this image to a PNG output stream.

Declaration

public void ExportAsPng(FilterWriter writer)

Parameters

Type	Name	Description
FilterWriter	writer	FilterWriter used to write to the output stream.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

ExportAsPng(String)

Saves this image to a PNG file.

Declaration

public void ExportAsPng(string filename)

Parameters

Type	Name	Description
System.String	filename	string that specifies the path name for the saved image. The filename should include the file extension

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

ExportAsTiff(FilterWriter)

Saves this image to a TIFF output stream.

Declaration

public void ExportAsTiff(FilterWriter writer)

Parameters

Type	Name	Description
FilterWriter	writer	FilterWriter used to write to the output stream.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

ExportAsTiff(String)

Saves this image to a TIFF file.

Declaration

public void ExportAsTiff(string filename)

Parameters

Type	Name	Description
System.String	filename	string that specifies the path name for the saved image. The filename should include the file extension

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

Finalize()

Releases all resources used by the Image

Declaration

protected void Finalize()

GetBitsPerComponent()

Gets the bits per component.

Declaration

public int GetBitsPerComponent()

Returns

Type	Description
System.Int32	the number of bits used to represent each color component. Only a single value may be specified; the number of bits is the same for all color components. Valid values are 1, 2, 4, 8, and 16.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

GetComponentNum()

Gets the component number.

Declaration

public int GetComponentNum()

Returns

Type	Description
System.Int32	the number of color components per sample.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

GetDecodeArray()

Gets the decode array.

Declaration

public Obj GetDecodeArray()

Returns

Type

Description

Obj

Decode array or NULL if the paramter is not specified. A decode object is an array of numbers describing how to map image samples into the range of values appropriate for the images color space . If ImageMask is true, the array must be either [0 1] or [1 0]; otherwise, its length must be twice the number of color components required by ColorSpace. Default value depends on the color space, See Table 4.36 in PDF Ref. Manual.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

GetImageColorSpace()

Gets the image color space.

Declaration

public ColorSpace GetImageColorSpace()

Returns

Type	Description
ColorSpace	The SDF object representing the color space in which image samples are specified or NULL if: the image is an image mask or is compressed using JPXDecode with missing ColorSpace entry in image dictionary. The returned color space may be any type of color space except Pattern.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

GetImageData()

Gets the image data.

Declaration

public Filter GetImageData()

Returns

Type	Description
Filter	A stream (filter) containing decoded image data

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

GetImageDataSize()

Gets the image data size.

Declaration

public int GetImageDataSize()

Returns

Type	Description
System.Int32	the size of image data in bytes

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

GetImageHeight()

Gets the image height.

Declaration

public int GetImageHeight()

Returns

Type	Description
System.Int32	the height of the image, in samples.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

GetImageRenderingIntent()

Gets the image rendering intent.

Declaration

public GState.RenderingIntent GetImageRenderingIntent()

Returns

Type	Description
GState.RenderingIntent	The color rendering intent to be used in rendering the image.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

GetImageWidth()

Gets the image width.

Declaration

public int GetImageWidth()

Returns

Type	Description
System.Int32	the width of the image, in samples.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

GetMask()

Gets the mask.

Declaration

public Obj GetMask()

Returns

Type	Description
Obj	an image XObject defining an image mask to be applied to this image (See 'Explicit Masking', 4.8.5), or an array specifying a range of colors to be applied to it as a color key mask (See 'Color Key Masking'). If IsImageMask() return true, this method will return NULL.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

GetSDFObj()

Gets the SDFObj.

Declaration

public Obj GetSDFObj()

Returns

Type	Description
Obj	the underlying SDF/Cos object

GetSoftMask()

Gets the soft mask.

Declaration

public Obj GetSoftMask()

Returns

Type	Description
Obj	an image XObject defining a Soft Mask to be applied to this image (See section 7.5.4 'Soft-Mask Images' in PDF Reference Manual), or NULL if the image does not have the soft mask.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

IsImageInterpolate()

Checks if is image interpolate.

Declaration

public bool IsImageInterpolate()

Returns

Type	Description
System.Boolean	a boolean indicating whether image interpolation is to be performed.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

IsImageMask()

Checks if is image mask.

Declaration

public bool IsImageMask()

Returns

Type	Description
System.Boolean	a boolean indicating whether the inline image is to be treated as an image mask.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

IsValid()

Checks if is valid.

Declaration

public bool IsValid()

Returns

Type	Description
System.Boolean	whether this is a valid raster image. If the function returns false the underlying SDF/Cos object is not a valid raster image and this Image object should be treated as null.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

op_Assign(Image)

Assignment operator

Declaration

public Image op_Assign(Image r)

Parameters

Type	Name	Description
Image	r	an given Image object

Returns

Type	Description
Image	an Image object that equals to the given object

Set(Image)

Sets value to the given image value

Declaration

public void Set(Image p)

Parameters

Type	Name	Description
Image	p	image object

SetMask(Image)

Set an Explicit Image Mask.

Declaration

public void SetMask(Image image_mask)

Parameters

Type	Name	Description
Image	image_mask	the new mask

Remarks

image_mask must be a valid image mask (i.e. image_mask.IsImageMask() must return true.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

SetMask(Obj)

Set a Color Key Mask.

Declaration

public void SetMask(Obj mask)

Parameters

Type	Name	Description
Obj	mask	is an Cos/SDF array specifying a range of colors to be masked out. Samples in the image that fall within this range are not painted, allowing the existing background to show through. The effect is similar to that of the video technique known as chroma-key. For details of the array format please refer to section 4.8.5 'Color Key Masking' in PDF Reference Manual.

Remarks

the current document takes the ownership of the given SDF object.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

SetSoftMask(Image)

Set a Soft Mask.

Declaration

public void SetSoftMask(Image soft_mask)

Parameters

Type	Name	Description
Image	soft_mask	is a subsidiary Image object defining a soft-mask image (See section 7.5.4 'Soft-Mask Images' in PDF Reference Manual) to be used as a source of mask shape or mask opacity values in the transparent imaging model. The alpha source parameter in the graphics state determines whether the mask values are interpreted as shape or opacity.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

Implements

System.IDisposable