mirror of git://gcc.gnu.org/git/gcc.git
124 lines
4.3 KiB
Java
124 lines
4.3 KiB
Java
/* PixelInterleavedSampleModel.java
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Copyright (C) 2004, 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.awt.image;
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/**
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* A <code>SampleModel</code> that uses exactly one element of the
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* raster’s {@link DataBuffer} per pixel, holds all bands in a
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* single bank, and stores band data in pixel-interleaved manner.
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*
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* @since 1.2
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*
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* @author Sascha Brawer (brawer@dandelis.ch)
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*/
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public class PixelInterleavedSampleModel
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extends ComponentSampleModel
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{
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public PixelInterleavedSampleModel(int dataType, int width, int height,
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int pixelStride, int scanlineStride,
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int[] bandOffsets)
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{
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super(dataType, width, height, pixelStride, scanlineStride,
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bandOffsets);
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}
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/**
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* Creates a new <code>SampleModel</code> that is like this one, but
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* uses the specified width and height.
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*
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* @param width the number of pixels in the horizontal direction.
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*
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* @param height the number of pixels in the vertical direction.
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*/
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public SampleModel createCompatibleSampleModel(int width, int height)
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{
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// Find minimum band offset.
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int minBandoff = bandOffsets[0];
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int numBands = bandOffsets.length;
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for (int i = 1; i < numBands; i++)
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{
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if (bandOffsets[i] < minBandoff)
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{
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minBandoff = bandOffsets[i];
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}
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}
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// Adjust band offsets so that minimum offset is at 0.
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int[] bandOff;
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if (minBandoff > 0)
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{
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bandOff = new int[numBands];
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for (int i = 0; i < numBands; i++)
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{
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bandOff[i] = bandOffsets[i] - minBandoff;
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}
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}
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else
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{
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bandOff = bandOffsets;
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}
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// Adjust scanline stride for new width.
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return new PixelInterleavedSampleModel(dataType, width, height,
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pixelStride, pixelStride * width,
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bandOff);
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}
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/**
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* Creates a new <code>SampleModel</code> that is like this one, but
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* uses only a subset of its bands.
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*
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* @param bands an array whose elements indicate which bands shall
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* be part of the subset. For example, <code>[0, 2, 3]</code> would
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* create a SampleModel containing bands #0, #2 and #3.
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*/
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public SampleModel createSubsetSampleModel(int[] bands)
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{
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int[] subOffsets;
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subOffsets = new int[bands.length];
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for (int i = 0; i < bands.length; i++)
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subOffsets[i] = bandOffsets[bands[i]];
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return new PixelInterleavedSampleModel(dataType, width, height,
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pixelStride, scanlineStride,
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subOffsets);
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}
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}
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