450 lines
14 KiB
Java
450 lines
14 KiB
Java
/* Copyright (C) 2000, 2002, 2003, 2004 Free Software Foundation
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301 USA.
|
|
|
|
Linking this library statically or dynamically with other modules is
|
|
making a combined work based on this library. Thus, the terms and
|
|
conditions of the GNU General Public License cover the whole
|
|
combination.
|
|
|
|
As a special exception, the copyright holders of this library give you
|
|
permission to link this library with independent modules to produce an
|
|
executable, regardless of the license terms of these independent
|
|
modules, and to copy and distribute the resulting executable under
|
|
terms of your choice, provided that you also meet, for each linked
|
|
independent module, the terms and conditions of the license of that
|
|
module. An independent module is a module which is not derived from
|
|
or based on this library. If you modify this library, you may extend
|
|
this exception to your version of the library, but you are not
|
|
obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. */
|
|
|
|
package java.awt.image;
|
|
|
|
import gnu.java.awt.BitMaskExtent;
|
|
import gnu.java.awt.Buffers;
|
|
|
|
/**
|
|
* @author Rolf W. Rasmussen (rolfwr@ii.uib.no)
|
|
*/
|
|
public class SinglePixelPackedSampleModel extends SampleModel
|
|
{
|
|
private int scanlineStride;
|
|
private int[] bitMasks;
|
|
private int[] bitOffsets;
|
|
private int[] sampleSize;
|
|
|
|
public SinglePixelPackedSampleModel(int dataType, int w, int h,
|
|
int[] bitMasks)
|
|
{
|
|
this(dataType, w, h, w, bitMasks);
|
|
}
|
|
|
|
public SinglePixelPackedSampleModel(int dataType, int w, int h,
|
|
int scanlineStride, int[] bitMasks)
|
|
{
|
|
super(dataType, w, h, bitMasks.length);
|
|
|
|
switch (dataType)
|
|
{
|
|
case DataBuffer.TYPE_BYTE:
|
|
case DataBuffer.TYPE_USHORT:
|
|
case DataBuffer.TYPE_INT:
|
|
break;
|
|
default:
|
|
throw new IllegalArgumentException("SinglePixelPackedSampleModel unsupported dataType");
|
|
}
|
|
|
|
this.scanlineStride = scanlineStride;
|
|
this.bitMasks = bitMasks;
|
|
|
|
bitOffsets = new int[numBands];
|
|
sampleSize = new int[numBands];
|
|
|
|
BitMaskExtent extent = new BitMaskExtent();
|
|
for (int b=0; b<numBands; b++)
|
|
{
|
|
extent.setMask(bitMasks[b]);
|
|
sampleSize[b] = extent.bitWidth;
|
|
bitOffsets[b] = extent.leastSignificantBit;
|
|
}
|
|
}
|
|
|
|
public int getNumDataElements()
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
public SampleModel createCompatibleSampleModel(int w, int h)
|
|
{
|
|
/* FIXME: We can avoid recalculation of bit offsets and sample
|
|
sizes here by passing these from the current instance to a
|
|
special private constructor. */
|
|
return new SinglePixelPackedSampleModel(dataType, w, h, bitMasks);
|
|
}
|
|
|
|
|
|
/**
|
|
* Creates a DataBuffer for holding pixel data in the format and
|
|
* layout described by this SampleModel. The returned buffer will
|
|
* consist of one single bank.
|
|
*/
|
|
public DataBuffer createDataBuffer()
|
|
{
|
|
int size;
|
|
|
|
// We can save (scanlineStride - width) pixels at the very end of
|
|
// the buffer. The Sun reference implementation (J2SE 1.3.1 and
|
|
// 1.4.1_01) seems to do this; tested with Mauve test code.
|
|
size = scanlineStride * (height - 1) + width;
|
|
|
|
return Buffers.createBuffer(getDataType(), size);
|
|
}
|
|
|
|
|
|
public int[] getSampleSize()
|
|
{
|
|
return sampleSize;
|
|
}
|
|
|
|
public int getSampleSize(int band)
|
|
{
|
|
return sampleSize[band];
|
|
}
|
|
|
|
public int getOffset(int x, int y)
|
|
{
|
|
return scanlineStride*y + x;
|
|
}
|
|
|
|
public int[] getBitOffsets()
|
|
{
|
|
return bitOffsets;
|
|
}
|
|
|
|
public int[] getBitMasks()
|
|
{
|
|
return bitMasks;
|
|
}
|
|
|
|
public int getScanlineStride()
|
|
{
|
|
return scanlineStride;
|
|
}
|
|
|
|
public SampleModel createSubsetSampleModel(int[] bands)
|
|
{
|
|
// FIXME: Is this the right way to interpret bands?
|
|
|
|
int numBands = bands.length;
|
|
|
|
int[] bitMasks = new int[numBands];
|
|
|
|
for (int b=0; b<numBands; b++)
|
|
bitMasks[b] = this.bitMasks[bands[b]];
|
|
|
|
return new SinglePixelPackedSampleModel(dataType, width, height,
|
|
scanlineStride, bitMasks);
|
|
}
|
|
|
|
public Object getDataElements(int x, int y, Object obj,
|
|
DataBuffer data)
|
|
{
|
|
int offset = scanlineStride*y + x + data.getOffset();
|
|
|
|
return Buffers.getData(data, offset, obj,
|
|
0, // destination offset,
|
|
1 // length
|
|
);
|
|
}
|
|
|
|
/**
|
|
* This is a more efficient implementation of the default implementation in the super
|
|
* class.
|
|
* @param x The x-coordinate of the pixel rectangle to store in <code>obj</code>.
|
|
* @param y The y-coordinate of the pixel rectangle to store in <code>obj</code>.
|
|
* @param w The width of the pixel rectangle to store in <code>obj</code>.
|
|
* @param h The height of the pixel rectangle to store in <code>obj</code>.
|
|
* @param obj The primitive array to store the pixels into or null to force creation.
|
|
* @param data The DataBuffer that is the source of the pixel data.
|
|
* @return The primitive array containing the pixel data.
|
|
* @see java.awt.image.SampleModel#getDataElements(int, int, int, int, java.lang.Object, java.awt.image.DataBuffer)
|
|
*/
|
|
public Object getDataElements(int x, int y, int w, int h, Object obj,
|
|
DataBuffer data)
|
|
{
|
|
int size = w*h;
|
|
int dataSize = size;
|
|
Object pixelData = null;
|
|
switch (getTransferType())
|
|
{
|
|
case DataBuffer.TYPE_BYTE:
|
|
pixelData = ((DataBufferByte) data).getData();
|
|
if (obj == null) obj = new byte[dataSize];
|
|
break;
|
|
case DataBuffer.TYPE_USHORT:
|
|
pixelData = ((DataBufferUShort) data).getData();
|
|
if (obj == null) obj = new short[dataSize];
|
|
break;
|
|
case DataBuffer.TYPE_INT:
|
|
pixelData = ((DataBufferInt) data).getData();
|
|
if (obj == null) obj = new int[dataSize];
|
|
break;
|
|
default:
|
|
// Seems like the only sensible thing to do.
|
|
throw new ClassCastException();
|
|
}
|
|
if(x==0 && scanlineStride == w)
|
|
{
|
|
// The full width need to be copied therefore we can copy in one shot.
|
|
System.arraycopy(pixelData, scanlineStride*y + data.getOffset(), obj, 0, size);
|
|
}
|
|
else
|
|
{
|
|
// Since we do not need the full width we need to copy line by line.
|
|
int outOffset = 0;
|
|
int dataOffset = scanlineStride*y + x + data.getOffset();
|
|
for (int yy = y; yy<(y+h); yy++)
|
|
{
|
|
System.arraycopy(pixelData, dataOffset, obj, outOffset, w);
|
|
dataOffset += scanlineStride;
|
|
outOffset += w;
|
|
}
|
|
}
|
|
return obj;
|
|
}
|
|
|
|
|
|
public int[] getPixel(int x, int y, int[] iArray, DataBuffer data)
|
|
{
|
|
int offset = scanlineStride*y + x;
|
|
if (iArray == null) iArray = new int[numBands];
|
|
int samples = data.getElem(offset);
|
|
|
|
for (int b=0; b<numBands; b++)
|
|
iArray[b] = (samples & bitMasks[b]) >>> bitOffsets[b];
|
|
|
|
return iArray;
|
|
}
|
|
|
|
public int[] getPixels(int x, int y, int w, int h, int[] iArray,
|
|
DataBuffer data)
|
|
{
|
|
int offset = scanlineStride*y + x;
|
|
if (iArray == null) iArray = new int[numBands*w*h];
|
|
int outOffset = 0;
|
|
for (y=0; y<h; y++)
|
|
{
|
|
int lineOffset = offset;
|
|
for (x=0; x<w; x++)
|
|
{
|
|
int samples = data.getElem(lineOffset++);
|
|
for (int b=0; b<numBands; b++)
|
|
iArray[outOffset++] = (samples & bitMasks[b]) >>> bitOffsets[b];
|
|
}
|
|
offset += scanlineStride;
|
|
}
|
|
return iArray;
|
|
}
|
|
|
|
public int getSample(int x, int y, int b, DataBuffer data)
|
|
{
|
|
int offset = scanlineStride*y + x;
|
|
int samples = data.getElem(offset);
|
|
return (samples & bitMasks[b]) >>> bitOffsets[b];
|
|
}
|
|
|
|
/**
|
|
* This method implements a more efficient way to set data elements than the default
|
|
* implementation of the super class. It sets the data elements line by line instead
|
|
* of pixel by pixel.
|
|
* @param x The x-coordinate of the data elements in <code>obj</code>.
|
|
* @param y The y-coordinate of the data elements in <code>obj</code>.
|
|
* @param w The width of the data elements in <code>obj</code>.
|
|
* @param h The height of the data elements in <code>obj</code>.
|
|
* @param obj The primitive array containing the data elements to set.
|
|
* @param data The DataBuffer to store the data elements into.
|
|
* @see java.awt.image.SampleModel#setDataElements(int, int, int, int, java.lang.Object, java.awt.image.DataBuffer)
|
|
*/
|
|
public void setDataElements(int x, int y, int w, int h,
|
|
Object obj, DataBuffer data)
|
|
{
|
|
|
|
Object pixelData;
|
|
switch (getTransferType())
|
|
{
|
|
case DataBuffer.TYPE_BYTE:
|
|
pixelData = ((DataBufferByte) data).getData();
|
|
break;
|
|
case DataBuffer.TYPE_USHORT:
|
|
pixelData = ((DataBufferUShort) data).getData();
|
|
break;
|
|
case DataBuffer.TYPE_INT:
|
|
pixelData = ((DataBufferInt) data).getData();
|
|
break;
|
|
default:
|
|
// Seems like the only sensible thing to do.
|
|
throw new ClassCastException();
|
|
}
|
|
|
|
int inOffset = 0;
|
|
int dataOffset = scanlineStride*y + x + data.getOffset();
|
|
for (int yy=y; yy<(y+h); yy++)
|
|
{
|
|
System.arraycopy(obj,inOffset,pixelData,dataOffset,w);
|
|
dataOffset += scanlineStride;
|
|
inOffset += w;
|
|
}
|
|
}
|
|
|
|
|
|
public void setDataElements(int x, int y, Object obj, DataBuffer data)
|
|
{
|
|
int offset = scanlineStride*y + x + data.getOffset();
|
|
|
|
int transferType = getTransferType();
|
|
if (getTransferType() != data.getDataType())
|
|
{
|
|
throw new IllegalArgumentException("transfer type ("+
|
|
getTransferType()+"), "+
|
|
"does not match data "+
|
|
"buffer type (" +
|
|
data.getDataType() +
|
|
").");
|
|
}
|
|
|
|
try
|
|
{
|
|
switch (transferType)
|
|
{
|
|
case DataBuffer.TYPE_BYTE:
|
|
{
|
|
DataBufferByte out = (DataBufferByte) data;
|
|
byte[] in = (byte[]) obj;
|
|
out.getData()[offset] = in[0];
|
|
return;
|
|
}
|
|
case DataBuffer.TYPE_USHORT:
|
|
{
|
|
DataBufferUShort out = (DataBufferUShort) data;
|
|
short[] in = (short[]) obj;
|
|
out.getData()[offset] = in[0];
|
|
return;
|
|
}
|
|
case DataBuffer.TYPE_INT:
|
|
{
|
|
DataBufferInt out = (DataBufferInt) data;
|
|
int[] in = (int[]) obj;
|
|
out.getData()[offset] = in[0];
|
|
return;
|
|
}
|
|
// FIXME: Fill in the other possible types.
|
|
default:
|
|
throw new InternalError();
|
|
}
|
|
}
|
|
catch (ArrayIndexOutOfBoundsException aioobe)
|
|
{
|
|
String msg = "While writing data elements" +
|
|
", x="+x+", y="+y+
|
|
", width="+width+", height="+height+
|
|
", scanlineStride="+scanlineStride+
|
|
", offset="+offset+
|
|
", data.getSize()="+data.getSize()+
|
|
", data.getOffset()="+data.getOffset()+
|
|
": " +
|
|
aioobe;
|
|
throw new ArrayIndexOutOfBoundsException(msg);
|
|
}
|
|
}
|
|
|
|
public void setPixel(int x, int y, int[] iArray, DataBuffer data)
|
|
{
|
|
int offset = scanlineStride*y + x;
|
|
|
|
int samples = 0;
|
|
for (int b=0; b<numBands; b++)
|
|
samples |= (iArray[b] << bitOffsets[b]) & bitMasks[b];
|
|
|
|
data.setElem(offset, samples);
|
|
}
|
|
|
|
/**
|
|
* This method implements a more efficient way to set pixels than the default
|
|
* implementation of the super class. It copies the pixel components directly
|
|
* from the input array instead of creating a intermediate buffer.
|
|
* @param x The x-coordinate of the pixel rectangle in <code>obj</code>.
|
|
* @param y The y-coordinate of the pixel rectangle in <code>obj</code>.
|
|
* @param w The width of the pixel rectangle in <code>obj</code>.
|
|
* @param h The height of the pixel rectangle in <code>obj</code>.
|
|
* @param iArray The primitive array containing the pixels to set.
|
|
* @param data The DataBuffer to store the pixels into.
|
|
* @see java.awt.image.SampleModel#setPixels(int, int, int, int, int[], java.awt.image.DataBuffer)
|
|
*/
|
|
public void setPixels(int x, int y, int w, int h, int[] iArray,
|
|
DataBuffer data)
|
|
{
|
|
int inOffset = 0;
|
|
int[] pixel = new int[numBands];
|
|
for (int yy=y; yy<(y+h); yy++)
|
|
{
|
|
int offset = scanlineStride*yy + x;
|
|
for (int xx=x; xx<(x+w); xx++)
|
|
{
|
|
int samples = 0;
|
|
for (int b=0; b<numBands; b++)
|
|
samples |= (iArray[inOffset+b] << bitOffsets[b]) & bitMasks[b];
|
|
data.setElem(0, offset, samples);
|
|
inOffset += numBands;
|
|
offset += 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
public void setSample(int x, int y, int b, int s, DataBuffer data)
|
|
{
|
|
int offset = scanlineStride*y + x;
|
|
int samples = data.getElem(offset);
|
|
int bitMask = bitMasks[b];
|
|
samples &= ~bitMask;
|
|
samples |= (s << bitOffsets[b]) & bitMask;
|
|
data.setElem(offset, samples);
|
|
}
|
|
|
|
/**
|
|
* Creates a String with some information about this SampleModel.
|
|
* @return A String describing this SampleModel.
|
|
* @see java.lang.Object#toString()
|
|
*/
|
|
public String toString()
|
|
{
|
|
StringBuffer result = new StringBuffer();
|
|
result.append(getClass().getName());
|
|
result.append("[");
|
|
result.append("scanlineStride=").append(scanlineStride);
|
|
for(int i=0; i < bitMasks.length; i+=1)
|
|
{
|
|
result.append(", mask[").append(i).append("]=0x").append(Integer.toHexString(bitMasks[i]));
|
|
}
|
|
|
|
result.append("]");
|
|
return result.toString();
|
|
}
|
|
}
|