1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.chimpchat.adb.image; 17 18 import com.android.ddmlib.RawImage; 19 20 import java.awt.Point; 21 import java.awt.image.BufferedImage; 22 import java.awt.image.DataBuffer; 23 import java.awt.image.DataBufferByte; 24 import java.awt.image.PixelInterleavedSampleModel; 25 import java.awt.image.Raster; 26 import java.awt.image.WritableRaster; 27 import java.util.Hashtable; 28 /** 29 * Useful image related functions. 30 */ 31 public class ImageUtils { 32 // Utility class 33 private ImageUtils() { } 34 35 private static Hashtable<?,?> EMPTY_HASH = new Hashtable(); 36 private static int[] BAND_OFFSETS_32 = { 0, 1, 2, 3 }; 37 private static int[] BAND_OFFSETS_16 = { 0, 1 }; 38 39 /** 40 * Convert a raw image into a buffered image. 41 * 42 * @param rawImage the raw image to convert 43 * @param image the old image to (possibly) recycle 44 * @return the converted image 45 */ 46 public static BufferedImage convertImage(RawImage rawImage, BufferedImage image) { 47 switch (rawImage.bpp) { 48 case 16: 49 return rawImage16toARGB(image, rawImage); 50 case 32: 51 return rawImage32toARGB(rawImage); 52 } 53 return null; 54 } 55 56 /** 57 * Convert a raw image into a buffered image. 58 * 59 * @param rawImage the image to convert. 60 * @return the converted image. 61 */ 62 public static BufferedImage convertImage(RawImage rawImage) { 63 return convertImage(rawImage, null); 64 } 65 66 static int getMask(int length) { 67 int res = 0; 68 for (int i = 0 ; i < length ; i++) { 69 res = (res << 1) + 1; 70 } 71 72 return res; 73 } 74 75 private static BufferedImage rawImage32toARGB(RawImage rawImage) { 76 // Do as much as we can to not make an extra copy of the data. This is just a bunch of 77 // classes that wrap's the raw byte array of the image data. 78 DataBufferByte dataBuffer = new DataBufferByte(rawImage.data, rawImage.size); 79 80 PixelInterleavedSampleModel sampleModel = 81 new PixelInterleavedSampleModel(DataBuffer.TYPE_BYTE, rawImage.width, rawImage.height, 82 4, rawImage.width * 4, BAND_OFFSETS_32); 83 WritableRaster raster = Raster.createWritableRaster(sampleModel, dataBuffer, 84 new Point(0, 0)); 85 return new BufferedImage(new ThirtyTwoBitColorModel(rawImage), raster, false, EMPTY_HASH); 86 } 87 88 private static BufferedImage rawImage16toARGB(BufferedImage image, RawImage rawImage) { 89 // Do as much as we can to not make an extra copy of the data. This is just a bunch of 90 // classes that wrap's the raw byte array of the image data. 91 DataBufferByte dataBuffer = new DataBufferByte(rawImage.data, rawImage.size); 92 93 PixelInterleavedSampleModel sampleModel = 94 new PixelInterleavedSampleModel(DataBuffer.TYPE_BYTE, rawImage.width, rawImage.height, 95 2, rawImage.width * 2, BAND_OFFSETS_16); 96 WritableRaster raster = Raster.createWritableRaster(sampleModel, dataBuffer, 97 new Point(0, 0)); 98 return new BufferedImage(new SixteenBitColorModel(rawImage), raster, false, EMPTY_HASH); 99 } 100 } 101
