Package bdsup2sub.bitmap

Class FilterOp

java.lang.Object

bdsup2sub.bitmap.FilterOp

class FilterOp
extends Object

Subsampling scaling algorithm with various filters.

Based on the ResampleOp class from the Java Image Scaling Library. by Morten Nobel-Joergensen which again is based on "Java Image Util".

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private class	FilterOp.SubSamplingData

Field Summary

Fields

Modifier and Type	Field	Description
private byte[]	a
private byte[]	b
private final int	dstHeight
private final int	dstWidth
private final com.mortennobel.imagescaling.ResampleFilter	filter
private byte[]	g
private FilterOp.SubSamplingData	horizontalSubsamplingData
private byte[]	r
private int	srcHeight
private int	srcWidth
private FilterOp.SubSamplingData	verticalSubsamplingData

Constructor Summary

Constructors

Constructor	Description
FilterOp(com.mortennobel.imagescaling.ResampleFilter filter, int dstWidth, int dstHeight)

Method Summary

Modifier and Type	Method	Description
private FilterOp.SubSamplingData	createSubSampling(int srcSize, int dstSize)
int[]	filter(Bitmap bitmap, Palette palette)
private void	filterHorizontally(byte[] src, int[] trg)	Apply filter to sample horizontally from src to Work
private void	filterVertically(int[] src, int[] trg)	Apply filter to sample vertically from temporary buffer to target buffer

Methods inherited from class java.lang.Object

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

Field Details

srcWidth

private int srcWidth

srcHeight

private int srcHeight

dstWidth

private final int dstWidth

dstHeight

private final int dstHeight

r

private byte[] r

g

private byte[] g

b

private byte[] b

a

private byte[] a

horizontalSubsamplingData

private FilterOp.SubSamplingData horizontalSubsamplingData

verticalSubsamplingData

private FilterOp.SubSamplingData verticalSubsamplingData

filter

private final com.mortennobel.imagescaling.ResampleFilter filter

Constructor Details

FilterOp

public FilterOp(com.mortennobel.imagescaling.ResampleFilter filter,
 int dstWidth,
 int dstHeight)

Method Details

filter

public int[] filter(Bitmap bitmap,
 Palette palette)

createSubSampling

private FilterOp.SubSamplingData createSubSampling(int srcSize,
 int dstSize)

filterVertically

private void filterVertically(int[] src,
 int[] trg)

Apply filter to sample vertically from temporary buffer to target buffer

Parameters:

src - Integer array holding result from filtering horizontally

trg - Integer array for target bitmap

filterHorizontally

private void filterHorizontally(byte[] src,
 int[] trg)

Apply filter to sample horizontally from src to Work

Parameters:

src - Byte array holding source image data

trg - Integer array to store temporary result from filtering horizontally