/*
* 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;
import java.util.Arrays;
import org.apache.harmony.awt.internal.nls.Messages;
/**
* The SinglePixelPackedSampleModel class represents pixel data where several
* samples combine to create a single pixel and are stored in a single data
* array element. This class supports TYPE_BYTE, TYPE_USHORT, TYPE_INT data
* types.
*
* @since Android 1.0
*/
public class SinglePixelPackedSampleModel extends SampleModel {
/**
* The bit masks.
*/
private int bitMasks[];
/**
* The bit offsets.
*/
private int bitOffsets[];
/**
* The bit sizes.
*/
private int bitSizes[];
/**
* The scanline stride.
*/
private int scanlineStride;
/**
* The max bit size.
*/
private int maxBitSize;
/**
* Instantiates a new SinglePixelPackedSampleModel with the specified
* parameters.
*
* @param dataType
* the data type of samples.
* @param w
* the width of the image data.
* @param h
* the height of the image data.
* @param bitMasks
* the bit masks for all the bands.
*/
public SinglePixelPackedSampleModel(int dataType, int w, int h, int bitMasks[]) {
this(dataType, w, h, w, bitMasks);
}
/**
* Instantiates a new SinglePixelPackedSampleModel with the specified
* parameters.
*
* @param dataType
* the data type of the samples.
* @param w
* the width of the image data.
* @param h
* the height of the image data.
* @param scanlineStride
* the scanline stride of the image data.
* @param bitMasks
* the bit masks for all the bands.
*/
public SinglePixelPackedSampleModel(int dataType, int w, int h, int scanlineStride,
int bitMasks[]) {
super(dataType, w, h, bitMasks.length);
if (dataType != DataBuffer.TYPE_BYTE && dataType != DataBuffer.TYPE_USHORT
&& dataType != DataBuffer.TYPE_INT) {
// awt.61=Unsupported data type: {0}
throw new IllegalArgumentException(Messages.getString("awt.61", //$NON-NLS-1$
dataType));
}
this.scanlineStride = scanlineStride;
this.bitMasks = bitMasks.clone();
this.bitOffsets = new int[this.numBands];
this.bitSizes = new int[this.numBands];
this.maxBitSize = 0;
for (int i = 0; i < this.numBands; i++) {
int offset = 0;
int size = 0;
int mask = bitMasks[i];
if (mask != 0) {
while ((mask & 1) == 0) {
mask >>>= 1;
offset++;
}
while ((mask & 1) == 1) {
mask >>>= 1;
size++;
}
if (mask != 0) {
// awt.62=Wrong mask : {0}
throw new IllegalArgumentException(Messages.getString("awt.62", bitMasks[i])); //$NON-NLS-1$
}
}
this.bitOffsets[i] = offset;
this.bitSizes[i] = size;
if (this.maxBitSize < size) {
this.maxBitSize = size;
}
}
}
@Override
public Object getDataElements(int x, int y, Object obj, DataBuffer data) {
if (x < 0 || y < 0 || x >= this.width || y >= this.height) {
// awt.63=Coordinates are not in bounds
throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$
}
switch (getTransferType()) {
case DataBuffer.TYPE_BYTE:
byte bdata[];
if (obj == null) {
bdata = new byte[1];
} else {
bdata = (byte[])obj;
}
bdata[0] = (byte)data.getElem(y * scanlineStride + x);
obj = bdata;
break;
case DataBuffer.TYPE_USHORT:
short sdata[];
if (obj == null) {
sdata = new short[1];
} else {
sdata = (short[])obj;
}
sdata[0] = (short)data.getElem(y * scanlineStride + x);
obj = sdata;
break;
case DataBuffer.TYPE_INT:
int idata[];
if (obj == null) {
idata = new int[1];
} else {
idata = (int[])obj;
}
idata[0] = data.getElem(y * scanlineStride + x);
obj = idata;
break;
}
return obj;
}
@Override
public void setDataElements(int x, int y, Object obj, DataBuffer data) {
if (x < 0 || y < 0 || x >= this.width || y >= this.height) {
// awt.63=Coordinates are not in bounds
throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$
}
switch (getTransferType()) {
case DataBuffer.TYPE_BYTE:
data.setElem(y * scanlineStride + x, ((byte[])obj)[0] & 0xff);
break;
case DataBuffer.TYPE_USHORT:
data.setElem(y * scanlineStride + x, ((short[])obj)[0] & 0xffff);
break;
case DataBuffer.TYPE_INT:
data.setElem(y * scanlineStride + x, ((int[])obj)[0]);
break;
}
}
/**
* Compares this SinglePixelPackedSampleModel object with the specified
* object.
*
* @param o
* the Object to be compared.
* @return true, if this SinglePixelPackedSampleModel object is equal to the
* specified object, false otherwise.
*/
@Override
public boolean equals(Object o) {
if ((o == null) || !(o instanceof SinglePixelPackedSampleModel)) {
return false;
}
SinglePixelPackedSampleModel model = (SinglePixelPackedSampleModel)o;
return this.width == model.width && this.height == model.height
&& this.numBands == model.numBands && this.dataType == model.dataType
&& Arrays.equals(this.bitMasks, model.bitMasks)
&& Arrays.equals(this.bitOffsets, model.bitOffsets)
&& Arrays.equals(this.bitSizes, model.bitSizes)
&& this.scanlineStride == model.scanlineStride;
}
@Override
public SampleModel createSubsetSampleModel(int bands[]) {
if (bands.length > this.numBands) {
// awt.64=The number of the bands in the subset is greater than the
// number of bands in the sample model
throw new RasterFormatException(Messages.getString("awt.64")); //$NON-NLS-1$
}
int masks[] = new int[bands.length];
for (int i = 0; i < bands.length; i++) {
masks[i] = this.bitMasks[bands[i]];
}
return new SinglePixelPackedSampleModel(this.dataType, this.width, this.height,
this.scanlineStride, masks);
}
@Override
public SampleModel createCompatibleSampleModel(int w, int h) {
return new SinglePixelPackedSampleModel(this.dataType, w, h, this.bitMasks);
}
@Override
public int[] getPixel(int x, int y, int iArray[], DataBuffer data) {
if (x < 0 || y < 0 || x >= this.width || y >= this.height) {
// awt.63=Coordinates are not in bounds
throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$
}
int pixel[];
if (iArray == null) {
pixel = new int[this.numBands];
} else {
pixel = iArray;
}
for (int i = 0; i < this.numBands; i++) {
pixel[i] = getSample(x, y, i, data);
}
return pixel;
}
@Override
public void setPixel(int x, int y, int iArray[], DataBuffer data) {
if (x < 0 || y < 0 || x >= this.width || y >= this.height) {
// awt.63=Coordinates are not in bounds
throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$
}
for (int i = 0; i < this.numBands; i++) {
setSample(x, y, i, iArray[i], data);
}
}
@Override
public int getSample(int x, int y, int b, DataBuffer data) {
if (x < 0 || y < 0 || x >= this.width || y >= this.height) {
// awt.63=Coordinates are not in bounds
throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$
}
int sample = data.getElem(y * scanlineStride + x);
return ((sample & this.bitMasks[b]) >>> this.bitOffsets[b]);
}
@Override
public int[] getPixels(int x, int y, int w, int h, int iArray[], DataBuffer data) {
if ((x < 0) || (y < 0) || ((long)x + (long)w > this.width)
|| ((long)y + (long)h > this.height)) {
// awt.63=Coordinates are not in bounds
throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$
}
int pixels[];
if (iArray == null) {
pixels = new int[w * h * this.numBands];
} else {
pixels = iArray;
}
int idx = 0;
for (int i = y; i < y + h; i++) {
for (int j = x; j < x + w; j++) {
for (int n = 0; n < this.numBands; n++) {
pixels[idx++] = getSample(j, i, n, data);
}
}
}
return pixels;
}
@Override
public void setPixels(int x, int y, int w, int h, int iArray[], DataBuffer data) {
if ((x < 0) || (y < 0) || ((long)x + (long)w > this.width)
|| ((long)y + (long)h > this.height)) {
// awt.63=Coordinates are not in bounds
throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$
}
int idx = 0;
for (int i = y; i < y + h; i++) {
for (int j = x; j < x + w; j++) {
for (int n = 0; n < this.numBands; n++) {
setSample(j, i, n, iArray[idx++], data);
}
}
}
}
@Override
public void setSample(int x, int y, int b, int s, DataBuffer data) {
if (x < 0 || y < 0 || x >= this.width || y >= this.height) {
// awt.63=Coordinates are not in bounds
throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$
}
int tmp = data.getElem(y * scanlineStride + x);
tmp &= ~this.bitMasks[b];
tmp |= (s << this.bitOffsets[b]) & this.bitMasks[b];
data.setElem(y * scanlineStride + x, tmp);
}
@Override
public int[] getSamples(int x, int y, int w, int h, int b, int iArray[], DataBuffer data) {
if ((x < 0) || (y < 0) || ((long)x + (long)w > this.width)
|| ((long)y + (long)h > this.height)) {
// awt.63=Coordinates are not in bounds
throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$
}
int samples[];
int idx = 0;
if (iArray == null) {
samples = new int[w * h];
} else {
samples = iArray;
}
for (int i = y; i < y + h; i++) {
for (int j = x; j < x + w; j++) {
samples[idx++] = getSample(j, i, b, data);
}
}
return samples;
}
@Override
public void setSamples(int x, int y, int w, int h, int b, int iArray[], DataBuffer data) {
if ((x < 0) || (y < 0) || ((long)x + (long)w > this.width)
|| ((long)y + (long)h > this.height)) {
// awt.63=Coordinates are not in bounds
throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$
}
int idx = 0;
for (int i = y; i < y + h; i++) {
for (int j = x; j < x + w; j++) {
setSample(x + j, y + i, b, iArray[idx++], data);
}
}
}
@Override
public DataBuffer createDataBuffer() {
DataBuffer data = null;
int size = (this.height - 1) * scanlineStride + width;
switch (this.dataType) {
case DataBuffer.TYPE_BYTE:
data = new DataBufferByte(size);
break;
case DataBuffer.TYPE_USHORT:
data = new DataBufferUShort(size);
break;
case DataBuffer.TYPE_INT:
data = new DataBufferInt(size);
break;
}
return data;
}
/**
* Gets the offset of the specified pixel in the data array.
*
* @param x
* the X coordinate of the specified pixel.
* @param y
* the Y coordinate of the specified pixel.
* @return the offset of the specified pixel.
*/
public int getOffset(int x, int y) {
return (y * scanlineStride + x);
}
@Override
public int getSampleSize(int band) {
return bitSizes[band];
}
@Override
public int[] getSampleSize() {
return bitSizes.clone();
}
/**
* Gets an array of the bit offsets of the data array elements.
*
* @return an array of the bit offsets.
*/
public int[] getBitOffsets() {
return bitOffsets.clone();
}
/**
* Gets an array of the bit masks for all bands.
*
* @return an array of the bit masks for all bands.
*/
public int[] getBitMasks() {
return bitMasks.clone();
}
/**
* Returns a hash code of this MultiPixelPackedSampleModel class.
*
* @return the hash code of this MultiPixelPackedSampleModel class.
*/
@Override
public int hashCode() {
int hash = 0;
int tmp = 0;
hash = width;
tmp = hash >>> 24;
hash <<= 8;
hash |= tmp;
hash ^= height;
tmp = hash >>> 24;
hash <<= 8;
hash |= tmp;
hash ^= numBands;
tmp = hash >>> 24;
hash <<= 8;
hash |= tmp;
hash ^= dataType;
tmp = hash >>> 24;
hash <<= 8;
hash |= tmp;
for (int element : bitMasks) {
hash ^= element;
tmp = hash >>> 24;
hash <<= 8;
hash |= tmp;
}
for (int element : bitOffsets) {
hash ^= element;
tmp = hash >>> 24;
hash <<= 8;
hash |= tmp;
}
for (int element : bitSizes) {
hash ^= element;
tmp = hash >>> 24;
hash <<= 8;
hash |= tmp;
}
hash ^= scanlineStride;
return hash;
}
/**
* Gets the scanline stride.
*
* @return the scanline stride
*/
public int getScanlineStride() {
return this.scanlineStride;
}
@Override
public int getNumDataElements() {
return 1;
}
}