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java.lang.Objectcom.sun.pdfview.function.PDFFunction
com.sun.pdfview.function.FunctionType0
public class FunctionType0
A sampled function maps input values to output values by interpolating along a line or cubic between two known values.
Field Summary | |
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protected static int |
CUBIC_INTERPOLATION
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protected static int |
LINEAR_INTERPOLATION
the valid interpolation methods |
Fields inherited from class com.sun.pdfview.function.PDFFunction |
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TYPE_0, TYPE_2, TYPE_3, TYPE_4 |
Constructor Summary | |
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protected |
FunctionType0()
Creates a new instance of FunctionType0 |
Method Summary | |
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protected void |
doFunction(float[] inputs,
int inputOffset,
float[] outputs,
int outputOffset)
Map from m input values to n output values. |
protected int |
getBitsPerSample()
Get the number of bits per sample |
protected float |
getDecode(int i)
Get the decoding for a particular input parameter |
protected float |
getEncode(int i)
Get the encoding for a particular input parameter |
protected int |
getOrder()
Get the interpolation type |
protected int |
getSample(int[] values,
int od)
Get a component for a sample given m indices and output dimension. |
protected int |
getSize(int dimension)
Get the size of a given input dimension |
static float |
interpolate(float x,
float xmin,
float xmax,
float ymin,
float ymax)
Perform a linear interpolation. |
protected void |
parse(PDFObject obj)
Read the function information from a PDF Object |
protected void |
setBitsPerSample(int bits)
Set the number of bits per sample |
protected void |
setDecode(float[] decode)
Set the decode array |
protected void |
setEncode(float[] encode)
Set the encode array |
protected void |
setOrder(int order)
Set the interpolation type |
protected void |
setSamples(int[][] samples)
Set the table of samples |
protected void |
setSize(int[] size)
Set the size of all input dimensions |
Methods inherited from class com.sun.pdfview.function.PDFFunction |
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calculate, calculate, getDomain, getFunction, getNumInputs, getNumOutputs, getRange, getType, setDomain, setRange |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected static final int LINEAR_INTERPOLATION
protected static final int CUBIC_INTERPOLATION
Constructor Detail |
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protected FunctionType0()
Method Detail |
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protected void parse(PDFObject obj) throws java.io.IOException
parse
in class PDFFunction
java.io.IOException
protected void doFunction(float[] inputs, int inputOffset, float[] outputs, int outputOffset)
doFunction
in class PDFFunction
inputs
- an array of m input valuesoutputs
- an array of size n which will be filled
with the output values, or null to return a new arrayinputOffset
- the offset into the inputs array to read fromoutputOffset
- the offset into the output array to write toprotected int getSize(int dimension)
dimension
- the input dimension to get the size of
protected void setSize(int[] size)
protected int getBitsPerSample()
protected void setBitsPerSample(int bits)
protected int getOrder()
protected void setOrder(int order)
protected float getEncode(int i)
i
- the index into the encoding array, which has size 2 * m.
the ith entry in the array has index 2i,
2i + 1
protected void setEncode(float[] encode)
protected float getDecode(int i)
i
- the index into the decoding array, which has size 2 * n.
the ith entry in the array has index 2i,
2i + 1
protected void setDecode(float[] decode)
protected int getSample(int[] values, int od)
values
- an array of m values determining which sample
to selectod
- the output dimension (0 - n) to get the sample in
protected void setSamples(int[][] samples)
public static float interpolate(float x, float xmin, float xmax, float ymin, float ymax)
x
- the x value of the inputxmin
- the minimum x valueymin
- the minimum y valuexmax
- the maximum x valueymax
- the maximum y value
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