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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
/**
* @author Igor V. Stolyarov
* @version $Revision$
*/
package java.awt.image;
/**
* The Class DataBufferByte is the subclass of DataBuffer for the case where the
* underlying data is of type byte.
*
* @since Android 1.0
*/
public final class DataBufferByte extends DataBuffer {
/**
* The data.
*/
byte data[][];
/**
* Instantiates a new data buffer of type unsigned short.
*
* @param dataArrays
* the data arrays to copy the data from.
* @param size
* the length (number of elements) to use from the data arrays.
* @param offsets
* the starting indices for reading the data from the internal
* data arrays.
*/
public DataBufferByte(byte dataArrays[][], int size, int offsets[]) {
super(TYPE_BYTE, size, dataArrays.length, offsets);
data = dataArrays.clone();
}
/**
* Instantiates a new data buffer of type unsigned short.
*
* @param dataArrays
* the data arrays to copy the data from.
* @param size
* the length (number of elements) to use from the data arrays.
*/
public DataBufferByte(byte dataArrays[][], int size) {
super(TYPE_BYTE, size, dataArrays.length);
data = dataArrays.clone();
}
/**
* Instantiates a new data buffer of type unsigned short with a single
* underlying array of data.
*
* @param dataArray
* the data array to copy the data from.
* @param size
* the length (number of elements) to use.
* @param offset
* the starting index to use when reading the data.
*/
public DataBufferByte(byte dataArray[], int size, int offset) {
super(TYPE_BYTE, size, 1, offset);
data = new byte[1][];
data[0] = dataArray;
}
/**
* Instantiates a new data buffer of type unsigned short with a single
* underlying array of data starting at index 0.
*
* @param dataArray
* the data array to copy the data from.
* @param size
* the length (number of elements) to use.
*/
public DataBufferByte(byte dataArray[], int size) {
super(TYPE_BYTE, size);
data = new byte[1][];
data[0] = dataArray;
}
/**
* Instantiates a new empty data buffer of type unsigned short with offsets
* equal to zero.
*
* @param size
* the length (number of elements) to use from the data arrays.
* @param numBanks
* the number of data arrays to create.
*/
public DataBufferByte(int size, int numBanks) {
super(TYPE_BYTE, size, numBanks);
data = new byte[numBanks][];
int i = 0;
while (i < numBanks) {
data[i++] = new byte[size];
}
}
/**
* Instantiates a new empty data buffer of type unsigned short with a single
* underlying array of data starting at index 0.
*
* @param size
* the length (number of elements) to use.
*/
public DataBufferByte(int size) {
super(TYPE_BYTE, size);
data = new byte[1][];
data[0] = new byte[size];
}
@Override
public void setElem(int bank, int i, int val) {
data[bank][offsets[bank] + i] = (byte)val;
notifyChanged();
}
@Override
public void setElem(int i, int val) {
data[0][offset + i] = (byte)val;
notifyChanged();
}
@Override
public int getElem(int bank, int i) {
return (data[bank][offsets[bank] + i]) & 0xff;
}
/**
* Gets the data of the specified internal data array.
*
* @param bank
* the index of the desired data array.
* @return the data.
*/
public byte[] getData(int bank) {
notifyTaken();
return data[bank];
}
@Override
public int getElem(int i) {
return (data[0][offset + i]) & 0xff;
}
/**
* Gets the bank data.
*
* @return the bank data.
*/
public byte[][] getBankData() {
notifyTaken();
return data.clone();
}
/**
* Gets the data of the first data array.
*
* @return the data.
*/
public byte[] getData() {
notifyTaken();
return data[0];
}
}
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