-/* Copyright (C) 2000, 2002 Free Software Foundation
+/* Copyright (C) 2000, 2002, 2004 Free Software Foundation
This file is part of GNU Classpath.
return Raster.createWritableRaster(sm, origin);
}
+
+ /**
+ * Creates a <code>SampleModel</code> whose arrangement of pixel
+ * data is compatible to this <code>ColorModel</code>.
+ *
+ * @param w the number of pixels in the horizontal direction.
+ * @param h the number of pixels in the vertical direction.
+ */
public SampleModel createCompatibleSampleModel(int w, int h)
{
- int pixelStride = getNumComponents();
-
- /* TODO: Maybe we don't need to create a new offset array each
- time, but rather use the same array every time. */
- int[] bandOffsets = new int[pixelStride];
- for (int i=0; i<pixelStride; i++) bandOffsets[i] = i;
- return new ComponentSampleModel(transferType, w, h,
- pixelStride, pixelStride*w,
- bandOffsets);
+ int pixelStride, scanlineStride;
+ int[] bandOffsets;
+
+ pixelStride = getNumComponents();
+ scanlineStride = pixelStride * w;
+
+ /* We might be able to re-use the same bandOffsets array among
+ * multiple calls to this method. However, this optimization does
+ * not seem worthwile because setting up descriptive data
+ * structures (such as SampleModels) is neglectible in comparision
+ * to shuffling around masses of pixel data.
+ */
+ bandOffsets = new int[pixelStride];
+ for (int i = 0; i < pixelStride; i++)
+ bandOffsets[i] = i;
+
+ /* FIXME: Think about whether it would make sense to return the
+ * possibly more efficient PixelInterleavedSampleModel for other
+ * transferTypes as well. It seems unlikely that this would break
+ * any user applications, so the Mauve tests on this method
+ * might be too restrictive.
+ */
+ switch (transferType)
+ {
+ case DataBuffer.TYPE_BYTE:
+ case DataBuffer.TYPE_USHORT:
+ return new PixelInterleavedSampleModel(transferType, w, h,
+ pixelStride,
+ scanlineStride,
+ bandOffsets);
+
+ default:
+ return new ComponentSampleModel(transferType, w, h,
+ pixelStride,
+ scanlineStride,
+ bandOffsets);
+ }
}
+
public boolean isCompatibleSampleModel(SampleModel sm)
{
return
-/* Copyright (C) 2000, 2002, 2003 Free Software Foundation
+/* Copyright (C) 2000, 2002, 2003, 2004 Free Software Foundation
This file is part of GNU Classpath.
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 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();
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 obj 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;
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();
+ }
}
projects / gcc.git / commitdiff