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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 | } | ||