Package org.apache.pdfbox.pdmodel.graphics.shading

Class PatchMeshesShadingContext

java.lang.Object

org.apache.pdfbox.pdmodel.graphics.shading.ShadingContext

org.apache.pdfbox.pdmodel.graphics.shading.TriangleBasedShadingContext

org.apache.pdfbox.pdmodel.graphics.shading.PatchMeshesShadingContext

All Implemented Interfaces:

PaintContext

Direct Known Subclasses:

Type6ShadingContext, Type7ShadingContext

abstract class PatchMeshesShadingContext
extends TriangleBasedShadingContext

This class is extended in Type6ShadingContext and Type7ShadingContext. This was done as part of GSoC2014, Tilman Hausherr is the mentor.

Field Summary

Fields

Modifier and Type	Field	Description
private List<Patch>	patchList	patch list

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	PatchMeshesShadingContext(PDMeshBasedShadingType shading, ColorModel colorModel, AffineTransform xform, Matrix matrix, Rectangle deviceBounds, int controlPoints)	Constructor creates an instance to be used for fill operations.

Method Summary

Modifier and Type	Method	Description
protected Map<Point,Integer>	calcPixelTable(Rectangle deviceBounds)	Calculate every point and its color and store them in a Hash table.
void	dispose()
protected boolean	isDataEmpty()	Returns true if the shading has an empty data stream.

Methods inherited from class org.apache.pdfbox.pdmodel.graphics.shading.TriangleBasedShadingContext

calcPixelTable, createPixelTable, getColorModel, getRaster

Methods inherited from class org.apache.pdfbox.pdmodel.graphics.shading.ShadingContext

convertToRGB, getBackground, getRgbBackground, getShading, getShadingColorSpace

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

patchList

private List<Patch> patchList

patch list

Constructor Details

PatchMeshesShadingContext

protected PatchMeshesShadingContext(PDMeshBasedShadingType shading,
 ColorModel colorModel,
 AffineTransform xform,
 Matrix matrix,
 Rectangle deviceBounds,
 int controlPoints)
                             throws IOException

Constructor creates an instance to be used for fill operations.

Parameters:

shading - the shading type to be used

colorModel - the color model to be used

xform - transformation for user to device space

matrix - the pattern matrix concatenated with that of the parent content stream

deviceBounds - device bounds

controlPoints - number of control points, 12 for type 6 shading and 16 for type 7 shading

Throws:

IOException - if something went wrong

Method Details

calcPixelTable

protected Map<Point,Integer> calcPixelTable(Rectangle deviceBounds)
                                     throws IOException

Description copied from class: TriangleBasedShadingContext

Calculate every point and its color and store them in a Hash table.

Specified by:

calcPixelTable in class TriangleBasedShadingContext

Returns:

a Hash table which contains all the points' positions and colors of one image

Throws:

IOException

dispose

public void dispose()

Specified by:

dispose in interface PaintContext

Overrides:

dispose in class TriangleBasedShadingContext

isDataEmpty

protected boolean isDataEmpty()

Description copied from class: TriangleBasedShadingContext

Returns true if the shading has an empty data stream.

Specified by:

isDataEmpty in class TriangleBasedShadingContext