Class ColorSpace

This abstract class is used to serve as a color space tag to identify the specific color space of a Color object. It contains methods that transform colors in a specific color space to/from several color space such as DeviceRGB and DeviceCMYK.

For purposes of the methods in this class, colors are represented as arrays of color components represented as doubles in a normalized range defined by each ColorSpace. For many ColorSpaces (e.g. DeviceRGB), this range is 0.0 to 1.0. However, some ColorSpaces have components whose values have a different range. Methods are provided to inquire per component minimum and maximum normalized values.

Inheritance

System.Object

ColorSpace

Implements

System.IDisposable

Inherited Members

System.Object.Equals(System.Object)

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

System.Object.GetHashCode()

System.Object.MemberwiseClone()

System.Object.ToString()

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

Namespace: pdftron.PDF

Assembly: PDFNetAndroid.dll

Syntax

public class ColorSpace : IDisposable

Remarks

Note that in Pattern color space (i.e. for ColorSpace::e_pattern) 'color values' are PDF::PatternColor objects instead of the numeric component values (i.e. ColorPt) used with other spaces.

Constructors

ColorSpace(Obj)

Create a ColorSpace from the given SDF/Cos object listed under ColorSpaces entry in page Resource dictionary. If color_space dictionary is null, a non valid ColorSpace object is created.

Declaration

public ColorSpace(Obj cs_dict)

Parameters

Type	Name	Description
Obj	cs_dict	the color_space

Methods

Convert2CMYK(ColorPt, ColorPt)

A convenience function used to convert color points from the current color space to DeviceCMYK color space.

Declaration

public virtual void Convert2CMYK(ColorPt in_color, ColorPt out_color)

Parameters

Type	Name	Description
ColorPt	in_color	input color point in the current color space
ColorPt	out_color	output color point in the DeviceCMYK color space

Remarks

the number to input colorants must match the number of colorants expected by the current color space.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

Convert2Gray(ColorPt, ColorPt)

A convenience function used to convert color points from the current color space to DeviceGray color space.

Declaration

public virtual void Convert2Gray(ColorPt in_color, ColorPt out_color)

Parameters

Type	Name	Description
ColorPt	in_color	input color point in the current color space
ColorPt	out_color	output color point in the DeviceGray color space

Remarks

the number to input colorants must match the number of colorants expected by the current color space.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

Convert2RGB(ColorPt, ColorPt)

A convenience function used to convert color points from the current color space to DeviceRGB color space.

Declaration

public virtual void Convert2RGB(ColorPt in_color, ColorPt out_color)

Parameters

Type	Name	Description
ColorPt	in_color	input color point in the current color space
ColorPt	out_color	output color point in the DeviceRGB color space

Remarks

the number to input colorants must match the number of colorants expected by the current color space.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

Create(Obj)

Create a new ColorSpace from a given object

Declaration

public static ColorSpace Create(Obj color_space)

Parameters

Type	Name	Description
Obj	color_space	existing color space

Returns

Type	Description
ColorSpace	the color space

CreateDeviceCMYK()

Create a new DeviceCMYK ColorSpace object.

Declaration

public static ColorSpace CreateDeviceCMYK()

Returns

Type	Description
ColorSpace	the color space

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

CreateDeviceGray()

Create a new DeviceGray ColorSpace object.

Declaration

public static ColorSpace CreateDeviceGray()

Returns

Type	Description
ColorSpace	the color space

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

CreateDeviceRGB()

Create a new DeviceRGB ColorSpace object.

Declaration

public static ColorSpace CreateDeviceRGB()

Returns

Type	Description
ColorSpace	the color space

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

CreateICCFromBuffer(SDFDoc, Byte[])

Creates the icc from buffer.

Declaration

public static ColorSpace CreateICCFromBuffer(SDFDoc doc, byte[] buffer)

Parameters

Type	Name	Description
SDFDoc	doc	the doc
System.Byte[]	buffer	the data

Returns

Type	Description
ColorSpace	the color space

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

CreateICCFromFile(SDFDoc, String)

Create a PDF 'ICCBased' color space given an ICC profile.

Declaration

public static ColorSpace CreateICCFromFile(SDFDoc doc, string filepath)

Parameters

Type	Name	Description
SDFDoc	doc	the doc
System.String	filepath	the filepath

Returns

Type	Description
ColorSpace	the color space

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

CreateICCFromFilter(SDFDoc, Filter)

Creates the icc from filter.

Declaration

public static ColorSpace CreateICCFromFilter(SDFDoc doc, Filter filter)

Parameters

Type	Name	Description
SDFDoc	doc	the doc
Filter	filter	the filter

Returns

Type	Description
ColorSpace	the color space

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

CreatePattern()

Create a new Pattern ColorSpace object.

Declaration

public static ColorSpace CreatePattern()

Returns

Type	Description
ColorSpace	the color space

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

Destroy()

Declaration

public void Destroy()

Dispose()

Declaration

public void Dispose()

Dispose(Boolean)

Declaration

protected virtual void Dispose(bool disposing)

Parameters

Type	Name	Description
System.Boolean	disposing

Finalize()

Releases all resources used by the ColorSpace

Declaration

protected void Finalize()

GetAlternateColorSpace()

Gets the alternate color space.

Declaration

public virtual ColorSpace GetAlternateColorSpace()

Returns

Type	Description
ColorSpace	the alternate color space if it is available or NULL otherwise. Color spaces that include alternate color space are e_separation, e_device_n, and e_icc.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

GetBaseColorSpace()

Gets the base color space.

Declaration

public virtual ColorSpace GetBaseColorSpace()

Returns

Type	Description
ColorSpace	the base color space if this is an e_indexed or e_pattern with associated base color space; NULL otherwise.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

GetComponentNum()

Gets the component num.

Declaration

public virtual int GetComponentNum()

Returns

Type	Description
System.Int32	The number of components (tint components) used to represent color point for this color space

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

GetComponentNum(ColorSpace.Type, Obj)

Gets the number of colorants (tint components) used to represent color point in this color space

Declaration

public static int GetComponentNum(ColorSpace.Type cs_type, Obj cs)

Parameters

Type	Name	Description
ColorSpace.Type	cs_type	ColorSpace type
Obj	cs	ColorSpace object

Returns

Type	Description
System.Int32	The number of colorants (tint components) used to represent color point in this color space

GetHighVal()

Gets the highest index for the color lookup table for Indexed color space.

Declaration

public virtual int GetHighVal()

Returns

Type	Description
System.Int32	the highest index for the color lookup table for Indexed color space. Since the color table is indexed from zero to highval, the actual number of entries is highval + 1. For color spaces other than indexed the method returns 0.

Remarks

for color spaces other than Indexed this method throws an exception.

GetLookupTable()

Gets the lookup table.

Declaration

public IntPtr GetLookupTable()

Returns

Type	Description
System.IntPtr	the color lookup table for Indexed color space. for color spaces other than indexed the method returns null.

Remarks

for color spaces other than Indexed this method throws an exception.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

GetSDFObj()

Gets the sDF obj.

Declaration

public Obj GetSDFObj()

Returns

Type	Description
Obj	the underlying SDF/Cos object

GetTintFunction()

Gets the tint function.

Declaration

public virtual Function GetTintFunction()

Returns

Type	Description
Function	the function that transforms tint values into color component values in the alternate color space.

Remarks

for color spaces other than Separation this method throws an exception.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

GetType()

Gets the type.

Declaration

public virtual ColorSpace.Type GetType()

Returns

Type	Description
ColorSpace.Type	The type of this color space

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

GetType(Obj)

Gets the type.

Declaration

public static ColorSpace.Type GetType(Obj cs)

Parameters

Type	Name	Description
Obj	cs	Cos/SDF color space object.

Returns

Type	Description
ColorSpace.Type	The Type of a given SDF/Cos color space, or e_null for if SDF object is not a valid color space

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

InitColor(ColorPt)

Set color to the initial value used for this color space. The initial value depends on the color space (see 4.5.7 in PDF Ref. Manual).

Declaration

public virtual void InitColor(ColorPt out_colorants)

Parameters

Type	Name	Description
ColorPt	out_colorants	the out_colorants

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

InitComponentRanges(Double[], Double[])

Initialize default ranges for each color component in the color space. For example, default ranges for DeviceRGB are [0 1 0 1 0 1] but for Lab the default values might be [0 100 -100 100 -100 100].

Declaration

public virtual void InitComponentRanges(double[] out_decode_low, double[] out_decode_range)

Parameters

Type	Name	Description
System.Double[]	out_decode_low	the out_decode_low
System.Double[]	out_decode_range	the out_decode_range

Remarks

the size of resulting vectors will match the number of color components in this color space.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

IsAll()

Checks if is all.

Declaration

public virtual bool IsAll()

Returns

Type	Description
System.Boolean	True if Separation color space contains the colorant All.

Remarks

for color spaces other than Separation this method throws an exception.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

IsNone()

Checks if is none.

Declaration

public virtual bool IsNone()

Returns

Type	Description
System.Boolean	True if Separation or DeviceN color space contains None colorants. For DeviceN the function returns true only if component colorant names are all None.

Remarks

for color spaces other than Separation or DeviceN this method throws an exception.

Exceptions

Type	Condition
PDFNetException	PDFNetException the PDFNet exception

Implements

System.IDisposable