001/* PixelInterleavedSampleModel.java 002 Copyright (C) 2004, 2005 Free Software Foundation, Inc. 003 004This file is part of GNU Classpath. 005 006GNU Classpath is free software; you can redistribute it and/or modify 007it under the terms of the GNU General Public License as published by 008the Free Software Foundation; either version 2, or (at your option) 009any later version. 010 011GNU Classpath is distributed in the hope that it will be useful, but 012WITHOUT ANY WARRANTY; without even the implied warranty of 013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014General Public License for more details. 015 016You should have received a copy of the GNU General Public License 017along with GNU Classpath; see the file COPYING. If not, write to the 018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01902110-1301 USA. 020 021Linking this library statically or dynamically with other modules is 022making a combined work based on this library. Thus, the terms and 023conditions of the GNU General Public License cover the whole 024combination. 025 026As a special exception, the copyright holders of this library give you 027permission to link this library with independent modules to produce an 028executable, regardless of the license terms of these independent 029modules, and to copy and distribute the resulting executable under 030terms of your choice, provided that you also meet, for each linked 031independent module, the terms and conditions of the license of that 032module. An independent module is a module which is not derived from 033or based on this library. If you modify this library, you may extend 034this exception to your version of the library, but you are not 035obligated to do so. If you do not wish to do so, delete this 036exception statement from your version. */ 037 038package java.awt.image; 039 040 041/** 042 * A <code>SampleModel</code> that uses exactly one element of the 043 * raster’s {@link DataBuffer} per pixel, holds all bands in a 044 * single bank, and stores band data in pixel-interleaved manner. 045 * 046 * @since 1.2 047 * 048 * @author Sascha Brawer (brawer@dandelis.ch) 049 */ 050public class PixelInterleavedSampleModel 051 extends ComponentSampleModel 052{ 053 public PixelInterleavedSampleModel(int dataType, int width, int height, 054 int pixelStride, int scanlineStride, 055 int[] bandOffsets) 056 { 057 super(dataType, width, height, pixelStride, scanlineStride, 058 bandOffsets); 059 } 060 061 062 /** 063 * Creates a new <code>SampleModel</code> that is like this one, but 064 * uses the specified width and height. 065 * 066 * @param width the number of pixels in the horizontal direction. 067 * 068 * @param height the number of pixels in the vertical direction. 069 */ 070 public SampleModel createCompatibleSampleModel(int width, int height) 071 { 072 // Find minimum band offset. 073 int minBandoff = bandOffsets[0]; 074 int numBands = bandOffsets.length; 075 for (int i = 1; i < numBands; i++) 076 { 077 if (bandOffsets[i] < minBandoff) 078 { 079 minBandoff = bandOffsets[i]; 080 } 081 } 082 // Adjust band offsets so that minimum offset is at 0. 083 int[] bandOff; 084 if (minBandoff > 0) 085 { 086 bandOff = new int[numBands]; 087 for (int i = 0; i < numBands; i++) 088 { 089 bandOff[i] = bandOffsets[i] - minBandoff; 090 } 091 } 092 else 093 { 094 bandOff = bandOffsets; 095 } 096 // Adjust scanline stride for new width. 097 return new PixelInterleavedSampleModel(dataType, width, height, 098 pixelStride, pixelStride * width, 099 bandOff); 100 } 101 102 103 /** 104 * Creates a new <code>SampleModel</code> that is like this one, but 105 * uses only a subset of its bands. 106 * 107 * @param bands an array whose elements indicate which bands shall 108 * be part of the subset. For example, <code>[0, 2, 3]</code> would 109 * create a SampleModel containing bands #0, #2 and #3. 110 */ 111 public SampleModel createSubsetSampleModel(int[] bands) 112 { 113 int[] subOffsets; 114 115 subOffsets = new int[bands.length]; 116 for (int i = 0; i < bands.length; i++) 117 subOffsets[i] = bandOffsets[bands[i]]; 118 119 return new PixelInterleavedSampleModel(dataType, width, height, 120 pixelStride, scanlineStride, 121 subOffsets); 122 } 123}