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| 1 | +/* | |
| 2 | + * Copyright (c) 2000, 2004, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | + | |
| 27 | + | |
| 28 | +package sun.awt.image; | |
| 29 | + | |
| 30 | +import java.awt.Point; | |
| 31 | +import java.awt.image.BufferedImage; | |
| 32 | +import java.awt.image.ColorModel; | |
| 33 | +import java.awt.image.DataBuffer; | |
| 34 | +import java.awt.image.DirectColorModel; | |
| 35 | +import java.awt.image.PixelInterleavedSampleModel; | |
| 36 | +import java.awt.image.SampleModel; | |
| 37 | +import java.awt.image.SinglePixelPackedSampleModel; | |
| 38 | +import java.awt.image.WritableRaster; | |
| 39 | +import sun.java2d.SurfaceData; | |
| 40 | + | |
| 41 | +/** | |
| 42 | + * WritableRasterNative | |
| 43 | + * This class exists to wrap a native DataBuffer object. The | |
| 44 | + * standard WritableRaster object assumes that a DataBuffer | |
| 45 | + * of a given type (e.g., DataBuffer.TYPE_INT) implies a certain | |
| 46 | + * subclass (e.g., DataBufferInt). But this is not always the | |
| 47 | + * case. DataBufferNative, for example, may allow access to | |
| 48 | + * integer-based data, but it is not DataBufferInt (which is a | |
| 49 | + * final class and cannot be subclassed). | |
| 50 | + * So this class exists simply to allow the WritableRaster | |
| 51 | + * functionality for this new kind of DataBuffer object. | |
| 52 | + */ | |
| 53 | +public class WritableRasterNative extends WritableRaster { | |
| 54 | + | |
| 55 | + public static WritableRasterNative createNativeRaster(SampleModel sm, | |
| 56 | + DataBuffer db) | |
| 57 | + { | |
| 58 | + return new WritableRasterNative(sm, db); | |
| 59 | + } | |
| 60 | + | |
| 61 | + protected WritableRasterNative(SampleModel sm, DataBuffer db) { | |
| 62 | + super(sm, db, new Point(0, 0)); | |
| 63 | + } | |
| 64 | + | |
| 65 | + public static WritableRasterNative createNativeRaster(ColorModel cm, | |
| 66 | + SurfaceData sd, | |
| 67 | + int width, | |
| 68 | + int height) | |
| 69 | + { | |
| 70 | + SampleModel smHw = null; | |
| 71 | + int dataType = 0; | |
| 72 | + int scanStride = width; | |
| 73 | + | |
| 74 | + switch (cm.getPixelSize()) { | |
| 75 | + case 8: | |
| 76 | + case 12: | |
| 77 | + // 8-bits uses PixelInterleavedSampleModel | |
| 78 | + if (cm.getPixelSize() == 8) { | |
| 79 | + dataType = DataBuffer.TYPE_BYTE; | |
| 80 | + } else { | |
| 81 | + dataType = DataBuffer.TYPE_USHORT; | |
| 82 | + } | |
| 83 | + int[] bandOffsets = new int[1]; | |
| 84 | + bandOffsets[0] = 0; | |
| 85 | + smHw = new PixelInterleavedSampleModel(dataType, width, | |
| 86 | + height, | |
| 87 | + 1, scanStride, | |
| 88 | + bandOffsets); | |
| 89 | + break; | |
| 90 | + | |
| 91 | + // all others use SinglePixelPackedSampleModel | |
| 92 | + case 15: | |
| 93 | + case 16: | |
| 94 | + dataType = DataBuffer.TYPE_USHORT; | |
| 95 | + int[] bitMasks = new int[3]; | |
| 96 | + DirectColorModel dcm = (DirectColorModel)cm; | |
| 97 | + bitMasks[0] = dcm.getRedMask(); | |
| 98 | + bitMasks[1] = dcm.getGreenMask(); | |
| 99 | + bitMasks[2] = dcm.getBlueMask(); | |
| 100 | + smHw = new SinglePixelPackedSampleModel(dataType, width, | |
| 101 | + height, scanStride, | |
| 102 | + bitMasks); | |
| 103 | + break; | |
| 104 | + case 24: | |
| 105 | + case 32: | |
| 106 | + dataType = DataBuffer.TYPE_INT; | |
| 107 | + bitMasks = new int[3]; | |
| 108 | + dcm = (DirectColorModel)cm; | |
| 109 | + bitMasks[0] = dcm.getRedMask(); | |
| 110 | + bitMasks[1] = dcm.getGreenMask(); | |
| 111 | + bitMasks[2] = dcm.getBlueMask(); | |
| 112 | + smHw = new SinglePixelPackedSampleModel(dataType, width, | |
| 113 | + height, scanStride, | |
| 114 | + bitMasks); | |
| 115 | + break; | |
| 116 | + default: | |
| 117 | + throw new InternalError("Unsupported depth " + | |
| 118 | + cm.getPixelSize()); | |
| 119 | + } | |
| 120 | + | |
| 121 | + DataBuffer dbn = new DataBufferNative(sd, dataType, | |
| 122 | + width, height); | |
| 123 | + return new WritableRasterNative(smHw, dbn); | |
| 124 | + } | |
| 125 | +} | |