From f911ba985aa7fe0096c386c5be385ac5825ea527 Mon Sep 17 00:00:00 2001
From: Tom Tromey <tromey@gcc.gnu.org>
Date: Sat, 16 Jul 2005 00:30:23 +0000
Subject: Initial revision

From-SVN: r102074
---
 .../java/awt/image/ComponentSampleModel.java       | 544 +++++++++++++++++++++
 1 file changed, 544 insertions(+)
 create mode 100644 libjava/classpath/java/awt/image/ComponentSampleModel.java

(limited to 'libjava/classpath/java/awt/image/ComponentSampleModel.java')

diff --git a/libjava/classpath/java/awt/image/ComponentSampleModel.java b/libjava/classpath/java/awt/image/ComponentSampleModel.java
new file mode 100644
index 00000000000..953f63c1ea1
--- /dev/null
+++ b/libjava/classpath/java/awt/image/ComponentSampleModel.java
@@ -0,0 +1,544 @@
+/* Copyright (C) 2000, 2002  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.Buffers;
+
+/* FIXME: This class does not yet support data type TYPE_SHORT */
+
+/**
+ * ComponentSampleModel supports a flexible organization of pixel samples in
+ * memory, permitting pixel samples to be interleaved by band, by scanline,
+ * and by pixel.
+ *
+ * A DataBuffer for this sample model has K banks of data.  Pixels have N
+ * samples, so there are N bands in the DataBuffer.  Each band is completely
+ * contained in one bank of data, but a bank may contain more than one band.
+ * Each pixel sample is stored in a single data element.
+ *
+ * Within a bank, each band begins at an offset stored in bandOffsets.  The
+ * banks containing the band is given by bankIndices.  Within the bank, there
+ * are three dimensions - band, pixel, and scanline.  The dimension ordering
+ * is controlled by bandOffset, pixelStride, and scanlineStride, which means
+ * that any combination of interleavings is supported.
+ *
+ * @author Rolf W. Rasmussen (rolfwr@ii.uib.no)
+ */
+public class ComponentSampleModel extends SampleModel
+{
+  protected int[] bandOffsets;
+  protected int[] bankIndices;
+  
+  // FIXME: Should we really shadow the numBands in the superclass?
+  //protected int numBands;
+  
+  /** Used when creating data buffers. */
+  protected int numBanks;
+
+  protected int scanlineStride;
+  
+  protected int pixelStride;
+  
+  private boolean tightPixelPacking = false;
+  
+  public ComponentSampleModel(int dataType,
+			      int w, int h,
+			      int pixelStride,
+			      int scanlineStride,
+			      int[] bandOffsets)
+  {
+    this(dataType, w, h, pixelStride, scanlineStride,
+	 new int[bandOffsets.length], bandOffsets);
+  }
+    
+  public ComponentSampleModel(int dataType,
+			      int w, int h,
+			      int pixelStride,
+			      int scanlineStride,
+			      int[] bankIndices,
+			      int[] bandOffsets)
+  {
+    super(dataType, w, h, bandOffsets.length);
+    if ((pixelStride<0) || (scanlineStride<0) || 
+	(bandOffsets.length<1) ||
+	(bandOffsets.length != bankIndices.length))
+      throw new IllegalArgumentException();
+    
+    this.bandOffsets = bandOffsets;
+    this.bankIndices = bankIndices;
+
+    this.numBanks = 0;
+    for (int b=0; b<bankIndices.length; b++)
+      this.numBanks = Math.max(this.numBanks, bankIndices[b]+1);
+
+    this.scanlineStride = scanlineStride;
+    this.pixelStride = pixelStride;
+
+    // See if we can use some speedups
+
+    /* FIXME: May these checks should be reserved for the
+       PixelInterleavedSampleModel? */
+	
+    if (pixelStride == numBands)
+      {
+	tightPixelPacking = true;
+	for (int b=0; b<numBands; b++) {
+	  if ((bandOffsets[b] != b) || (bankIndices[b] !=0))
+	    {
+	      tightPixelPacking = false;
+	      break;
+	    }
+	}
+      }
+  }		
+
+  public SampleModel createCompatibleSampleModel(int w, int h)
+  {
+    return new ComponentSampleModel(dataType, w, h, pixelStride,
+				    scanlineStride, bankIndices,
+				    bandOffsets);
+  }
+
+  public SampleModel createSubsetSampleModel(int[] bands)
+  {
+    int numBands = bands.length;
+    
+    int[] bankIndices = new int[numBands];
+    int[] bandOffsets = new int[numBands];
+    for (int b=0; b<numBands; b++)
+      {
+	bankIndices[b] = this.bankIndices[bands[b]];
+	bandOffsets[b] = this.bandOffsets[bands[b]];
+      }
+
+    return new ComponentSampleModel(dataType, width, height, pixelStride,
+				    scanlineStride, bankIndices,
+				    bandOffsets);
+  }
+
+  public DataBuffer createDataBuffer()
+  {
+    // Maybe this value should be precalculated in the constructor?
+    int highestOffset = 0;
+    for (int b=0; b<numBands; b++)
+      {
+	highestOffset = Math.max(highestOffset, bandOffsets[b]);
+      }
+    int size = pixelStride*(width-1) + scanlineStride*(height-1) +
+      highestOffset + 1;
+    
+    return Buffers.createBuffer(getDataType(), size, numBanks);
+  }
+
+  public int getOffset(int x, int y)
+  {
+    return getOffset(x, y, 0);
+  }
+
+  public int getOffset(int x, int y, int b)
+  {
+    return bandOffsets[b] + pixelStride*x + scanlineStride*y;
+  }
+
+  public final int[] getSampleSize()
+  {
+    int size = DataBuffer.getDataTypeSize(getDataType());
+    int[] sizes = new int[numBands];
+
+    java.util.Arrays.fill(sizes, size);
+    return sizes;
+  }
+
+  public final int getSampleSize(int band)
+  {
+    return DataBuffer.getDataTypeSize(getDataType());
+  }
+
+  public final int[] getBankIndices()
+  {
+    return bankIndices;
+  }
+
+  public final int[] getBandOffsets()
+  {
+    return bandOffsets;
+  }
+
+  public final int getScanlineStride()
+  {
+    return scanlineStride;
+  }
+
+  public final int getPixelStride()
+  {
+    return pixelStride;
+  }
+
+  public final int getNumDataElements()
+  {
+    return numBands;
+  }
+
+  public Object getDataElements(int x, int y, Object obj, DataBuffer data)
+  {
+    int xyOffset = pixelStride*x + scanlineStride*y;
+    
+    int[] totalBandDataOffsets = new int[numBands];
+    
+    /* Notice that band and bank offsets are different. Band offsets
+       are managed by the sample model, and bank offsets are managed
+       by the data buffer. Both must be accounted for. */
+    
+    /* FIXME: For single pixels, it is probably easier to simple
+       call getElem instead of calculating the bank offset ourself.
+       
+       On the other hand, then we need to push the value through
+       the int type returned by the getElem method.  */
+    
+    int[] bankOffsets = data.getOffsets();
+    
+    for (int b=0; b<numBands; b++)
+      {
+	totalBandDataOffsets[b] = 
+	  bandOffsets[b]+bankOffsets[bankIndices[b]] + xyOffset;
+      }
+	
+    try
+      {
+	switch (getTransferType())
+	  {
+	  case DataBuffer.TYPE_BYTE:
+	    DataBufferByte inByte = (DataBufferByte) data;
+	    byte[] outByte = (byte[]) obj;
+	    if (outByte == null) outByte = new byte[numBands];
+		
+	    for (int b=0; b<numBands; b++)
+	      {
+		int dOffset = totalBandDataOffsets[b];
+		outByte[b] = inByte.getData(bankIndices[b])[dOffset];
+	      }
+	    return outByte;
+		
+	  case DataBuffer.TYPE_USHORT:
+	    DataBufferUShort inUShort = (DataBufferUShort) data;
+	    short[] outUShort = (short[]) obj;
+	    if (outUShort == null) outUShort = new short[numBands];
+		
+	    for (int b=0; b<numBands; b++)
+	      {
+		int dOffset = totalBandDataOffsets[b];
+		outUShort[b] = inUShort.getData(bankIndices[b])[dOffset];
+	      }
+	    return outUShort;
+
+	  case DataBuffer.TYPE_SHORT:
+	    DataBufferShort inShort = (DataBufferShort) data;
+	    short[] outShort = (short[]) obj;
+	    if (outShort == null) outShort = new short[numBands];
+		
+	    for (int b=0; b<numBands; b++)
+	      {
+		int dOffset = totalBandDataOffsets[b];
+		outShort[b] = inShort.getData(bankIndices[b])[dOffset];
+	      }
+	    return outShort;
+
+	  case DataBuffer.TYPE_INT:
+	    DataBufferInt inInt = (DataBufferInt) data;
+	    int[] outInt = (int[]) obj;
+	    if (outInt == null) outInt = new int[numBands];
+		
+	    for (int b=0; b<numBands; b++)
+	      {
+		int dOffset = totalBandDataOffsets[b];
+		outInt[b] = inInt.getData(bankIndices[b])[dOffset];
+	      }
+	    return outInt;
+
+	  case DataBuffer.TYPE_FLOAT:
+	    DataBufferFloat inFloat = (DataBufferFloat) data;
+	    float[] outFloat = (float[]) obj;
+	    if (outFloat == null) outFloat = new float[numBands];
+
+	    for (int b=0; b<numBands; b++)
+	      {
+		int dOffset = totalBandDataOffsets[b];
+		outFloat[b] = inFloat.getData(bankIndices[b])[dOffset];
+	      }
+	    return outFloat;
+	    
+	  case DataBuffer.TYPE_DOUBLE:
+	    DataBufferDouble inDouble = (DataBufferDouble) data;
+	    double[] outDouble = (double[]) obj;
+	    if (outDouble == null) outDouble = new double[numBands];
+
+	    for (int b=0; b<numBands; b++)
+	      {
+		int dOffset = totalBandDataOffsets[b];
+		outDouble[b] = inDouble.getData(bankIndices[b])[dOffset];
+	      }
+	    return outDouble;
+	    
+	  default:
+	      throw new IllegalStateException("unknown transfer type " +
+					      getTransferType());
+	  }
+      }
+    catch (ArrayIndexOutOfBoundsException aioobe)
+      {
+	String msg = "While reading data elements, " +
+	  "x=" + x + ", y=" + y +", " + ", xyOffset=" + xyOffset +
+	  ", data.getSize()=" + data.getSize() + ": " + aioobe;
+	throw new ArrayIndexOutOfBoundsException(msg);
+      }
+  }
+
+  public Object getDataElements(int x, int y, int w, int h, Object obj,
+				DataBuffer data)
+  {
+    if (!tightPixelPacking)
+      {
+	return super.getDataElements(x, y, w, h, obj, data);
+      }
+
+    // using get speedup
+    
+    // We can copy whole rows
+    int rowSize = w*numBands;
+    int dataSize = rowSize*h;
+    
+    DataBuffer transferBuffer =
+      Buffers.createBuffer(getTransferType(), obj, dataSize);
+    obj = Buffers.getData(transferBuffer);
+
+    int inOffset =
+      pixelStride*x +
+      scanlineStride*y +
+      data.getOffset(); // Assumes only one band is used
+
+    /* We don't add band offsets since we assume that bands have
+       offsets 0, 1, 2, ... */
+
+    // See if we can copy everything in one go
+    if (scanlineStride == rowSize)
+      {
+	// Collapse scan lines:
+	rowSize *= h;
+	// We ignore scanlineStride since it won't be of any use
+	h = 1;
+      }
+
+    int outOffset = 0;
+    Object inArray = Buffers.getData(data);
+    for (int yd = 0; yd<h; yd++)
+      {
+	System.arraycopy(inArray, inOffset, obj, outOffset, rowSize);
+	inOffset  += scanlineStride;
+	outOffset += rowSize;
+      }
+    return obj;
+  }
+
+  public void setDataElements(int x, int y, int w, int h,
+			      Object obj, DataBuffer data)
+  {
+    if (!tightPixelPacking)
+      {
+	super.setDataElements(x, y, w, h, obj, data);
+	return;
+      }
+
+    // using set speedup, we can copy whole rows
+    int rowSize = w*numBands;
+    int dataSize = rowSize*h;
+    
+    DataBuffer transferBuffer =
+      Buffers.createBufferFromData(getTransferType(), obj, dataSize);
+
+    int[] bankOffsets = data.getOffsets();
+
+    int outOffset =
+      pixelStride*x +
+      scanlineStride*y +
+      bankOffsets[0]; // same assuptions as in get...
+
+    // See if we can copy everything in one go
+    if (scanlineStride == rowSize)
+      {
+	// Collapse scan lines:
+	rowSize *= h;
+	h = 1;
+      }
+
+    int inOffset = 0;
+    Object outArray = Buffers.getData(data);
+    for (int yd = 0; yd<h; yd++)
+      {
+	System.arraycopy(obj, inOffset, outArray, outOffset, rowSize);
+	outOffset += scanlineStride;
+	inOffset  += rowSize;
+      }
+  }
+
+  public int[] getPixel(int x, int y, int[] iArray, DataBuffer data)
+  {
+    int offset = pixelStride*x + scanlineStride*y;
+    if (iArray == null) iArray = new int[numBands];
+    for (int b=0; b<numBands; b++)
+      {
+	iArray[b] = data.getElem(bankIndices[b], offset+bandOffsets[b]);
+      }
+    return iArray;
+  }
+
+  public int[] getPixels(int x, int y, int w, int h, int[] iArray,
+			 DataBuffer data)
+  {
+    int offset = pixelStride*x + scanlineStride*y;
+    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++)
+	  {
+	    for (int b=0; b<numBands; b++)
+	      {
+		iArray[outOffset++] = 
+		  data.getElem(bankIndices[b], lineOffset+bandOffsets[b]);
+	      }
+	    lineOffset += pixelStride;
+	  }
+	offset += scanlineStride;
+      }
+    return iArray;
+  }
+    
+  public int getSample(int x, int y, int b, DataBuffer data)
+  {
+    return data.getElem(bankIndices[b], getOffset(x, y, b));
+  }
+
+  public void setDataElements(int x, int y, Object obj, DataBuffer data)
+  {
+    int offset = pixelStride*x + scanlineStride*y;
+    int[] totalBandDataOffsets = new int[numBands];
+    int[] bankOffsets = data.getOffsets();
+    for (int b=0; b<numBands; b++)
+      totalBandDataOffsets[b] =
+	bandOffsets[b]+bankOffsets[bankIndices[b]] + offset;
+
+    switch (getTransferType())
+      {
+      case DataBuffer.TYPE_BYTE:
+	{
+	  DataBufferByte out = (DataBufferByte) data;
+	  byte[] in = (byte[]) obj;
+	  
+	  for (int b=0; b<numBands; b++)
+	    out.getData(bankIndices[b])[totalBandDataOffsets[b]] = in[b];
+	  
+	  return;
+	}
+      case DataBuffer.TYPE_USHORT:
+	{
+	  DataBufferUShort out = (DataBufferUShort) data;
+	  short[] in = (short[]) obj;
+	  
+	  for (int b=0; b<numBands; b++)
+	    out.getData(bankIndices[b])[totalBandDataOffsets[b]] = in[b];
+	  
+	  return;
+	}
+      case DataBuffer.TYPE_SHORT:
+	{
+	  DataBufferShort out = (DataBufferShort) data;
+	  short[] in = (short[]) obj;
+	  
+	  for (int b=0; b<numBands; b++)
+	    out.getData(bankIndices[b])[totalBandDataOffsets[b]] = in[b];
+	  
+	  return;
+	}
+      case DataBuffer.TYPE_INT:
+	{
+	  DataBufferInt out = (DataBufferInt) data;
+	  int[] in = (int[]) obj;
+	  
+	  for (int b=0; b<numBands; b++)
+	    out.getData(bankIndices[b])[totalBandDataOffsets[b]] = in[b];
+	  
+	  return;
+	}
+      case DataBuffer.TYPE_FLOAT:
+	{
+	  DataBufferFloat out = (DataBufferFloat) data;
+	  float[] in = (float[]) obj;
+	  
+	  for (int b=0; b<numBands; b++)
+	    out.getData(bankIndices[b])[totalBandDataOffsets[b]] = in[b];
+	  
+	  return;
+	}
+      case DataBuffer.TYPE_DOUBLE:
+	{
+	  DataBufferDouble out = (DataBufferDouble) data;
+	  double[] in = (double[]) obj;
+	  
+	  for (int b=0; b<numBands; b++)
+	    out.getData(bankIndices[b])[totalBandDataOffsets[b]] = in[b];
+	  
+	  return;
+	}
+      default:
+	throw new UnsupportedOperationException("transfer type not " +
+						"implemented");
+      }
+  }
+  
+  public void setPixel(int x, int y, int[] iArray, DataBuffer data)
+  {
+    int offset = pixelStride*x + scanlineStride*y;
+    for (int b=0; b<numBands; b++)
+      data.setElem(bankIndices[b], offset+bandOffsets[b], iArray[b]);
+  }
+    
+  public void setSample(int x, int y, int b, int s, DataBuffer data)
+  {
+    data.setElem(bankIndices[b], getOffset(x, y, b), s);
+  }
+}
-- 
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