/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.monkeyrunner.adb.image;
import com.android.ddmlib.RawImage;
import java.awt.Point;
import java.awt.image.BufferedImage;
import java.awt.image.DataBuffer;
import java.awt.image.DataBufferByte;
import java.awt.image.PixelInterleavedSampleModel;
import java.awt.image.Raster;
import java.awt.image.WritableRaster;
import java.util.Hashtable;
/**
* Useful image related functions.
*/
public class ImageUtils {
// Utility class
private ImageUtils() { }
private static Hashtable<?,?> EMPTY_HASH = new Hashtable();
private static int[] BAND_OFFSETS_32 = { 0, 1, 2, 3 };
private static int[] BAND_OFFSETS_16 = { 0, 1 };
/**
* Convert a raw image into a buffered image.
*
* @param rawImage the raw image to convert
* @param image the old image to (possibly) recycle
* @return the converted image
*/
public static BufferedImage convertImage(RawImage rawImage, BufferedImage image) {
switch (rawImage.bpp) {
case 16:
return rawImage16toARGB(image, rawImage);
case 32:
return rawImage32toARGB(rawImage);
}
return null;
}
/**
* Convert a raw image into a buffered image.
*
* @param rawImage the image to convert.
* @return the converted image.
*/
public static BufferedImage convertImage(RawImage rawImage) {
return convertImage(rawImage, null);
}
static int getMask(int length) {
int res = 0;
for (int i = 0 ; i < length ; i++) {
res = (res << 1) + 1;
}
return res;
}
private static BufferedImage rawImage32toARGB(RawImage rawImage) {
// Do as much as we can to not make an extra copy of the data. This is just a bunch of
// classes that wrap's the raw byte array of the image data.
DataBufferByte dataBuffer = new DataBufferByte(rawImage.data, rawImage.size);
PixelInterleavedSampleModel sampleModel =
new PixelInterleavedSampleModel(DataBuffer.TYPE_BYTE, rawImage.width, rawImage.height,
4, rawImage.width * 4, BAND_OFFSETS_32);
WritableRaster raster = Raster.createWritableRaster(sampleModel, dataBuffer,
new Point(0, 0));
return new BufferedImage(new ThirtyTwoBitColorModel(rawImage), raster, false, EMPTY_HASH);
}
private static BufferedImage rawImage16toARGB(BufferedImage image, RawImage rawImage) {
// Do as much as we can to not make an extra copy of the data. This is just a bunch of
// classes that wrap's the raw byte array of the image data.
DataBufferByte dataBuffer = new DataBufferByte(rawImage.data, rawImage.size);
PixelInterleavedSampleModel sampleModel =
new PixelInterleavedSampleModel(DataBuffer.TYPE_BYTE, rawImage.width, rawImage.height,
2, rawImage.width * 2, BAND_OFFSETS_16);
WritableRaster raster = Raster.createWritableRaster(sampleModel, dataBuffer,
new Point(0, 0));
return new BufferedImage(new SixteenBitColorModel(rawImage), raster, false, EMPTY_HASH);
}
}