/// <summary>
/// Performs a convolution on Rasters. Each band of the source Raster
/// will be convolved.
/// The source and destination must have the same number of bands.
/// If the destination Raster is null, a new Raster will be created.
/// The IllegalArgumentException may be thrown if the source is
/// the same as the destination. </summary>
/// <param name="src"> the source <code>Raster</code> to filter </param>
/// <param name="dst"> the destination <code>WritableRaster</code> for the
/// filtered <code>src</code> </param>
/// <returns> the filtered <code>WritableRaster</code> </returns>
/// <exception cref="NullPointerException"> if <code>src</code> is <code>null</code> </exception>
/// <exception cref="ImagingOpException"> if <code>src</code> and <code>dst</code>
/// do not have the same number of bands </exception>
/// <exception cref="ImagingOpException"> if <code>src</code> cannot be filtered </exception>
/// <exception cref="IllegalArgumentException"> if <code>src</code> equals
/// <code>dst</code> </exception>
public WritableRaster Filter(Raster src, WritableRaster dst)
{
if (dst == null)
{
dst = CreateCompatibleDestRaster(src);
}
else if (src == dst)
{
throw new IllegalArgumentException("src image cannot be the " + "same as the dst image");
}
else if (src.NumBands != dst.NumBands)
{
throw new ImagingOpException("Different number of bands in src " + " and dst Rasters");
}
if (ImagingLib.filter(this, src, dst) == null)
{
throw new ImagingOpException("Unable to convolve src image");
}
return(dst);
}
/// <summary>
/// Performs a convolution on BufferedImages. Each component of the
/// source image will be convolved (including the alpha component, if
/// present).
/// If the color model in the source image is not the same as that
/// in the destination image, the pixels will be converted
/// in the destination. If the destination image is null,
/// a BufferedImage will be created with the source ColorModel.
/// The IllegalArgumentException may be thrown if the source is the
/// same as the destination. </summary>
/// <param name="src"> the source <code>BufferedImage</code> to filter </param>
/// <param name="dst"> the destination <code>BufferedImage</code> for the
/// filtered <code>src</code> </param>
/// <returns> the filtered <code>BufferedImage</code> </returns>
/// <exception cref="NullPointerException"> if <code>src</code> is <code>null</code> </exception>
/// <exception cref="IllegalArgumentException"> if <code>src</code> equals
/// <code>dst</code> </exception>
/// <exception cref="ImagingOpException"> if <code>src</code> cannot be filtered </exception>
public BufferedImage Filter(BufferedImage src, BufferedImage dst)
{
if (src == null)
{
throw new NullPointerException("src image is null");
}
if (src == dst)
{
throw new IllegalArgumentException("src image cannot be the " + "same as the dst image");
}
bool needToConvert = false;
ColorModel srcCM = src.ColorModel;
ColorModel dstCM;
BufferedImage origDst = dst;
// Can't convolve an IndexColorModel. Need to expand it
if (srcCM is IndexColorModel)
{
IndexColorModel icm = (IndexColorModel)srcCM;
src = icm.ConvertToIntDiscrete(src.Raster, false);
srcCM = src.ColorModel;
}
if (dst == null)
{
dst = CreateCompatibleDestImage(src, null);
dstCM = srcCM;
origDst = dst;
}
else
{
dstCM = dst.ColorModel;
if (srcCM.ColorSpace.Type != dstCM.ColorSpace.Type)
{
needToConvert = true;
dst = CreateCompatibleDestImage(src, null);
dstCM = dst.ColorModel;
}
else if (dstCM is IndexColorModel)
{
dst = CreateCompatibleDestImage(src, null);
dstCM = dst.ColorModel;
}
}
if (ImagingLib.filter(this, src, dst) == null)
{
throw new ImagingOpException("Unable to convolve src image");
}
if (needToConvert)
{
ColorConvertOp ccop = new ColorConvertOp(Hints);
ccop.Filter(dst, origDst);
}
else if (origDst != dst)
{
java.awt.Graphics2D g = origDst.CreateGraphics();
try
{
g.DrawImage(dst, 0, 0, null);
}
finally
{
g.Dispose();
}
}
return(origDst);
}
/// <summary>
/// Performs a lookup operation on a <code>BufferedImage</code>.
/// If the color model in the source image is not the same as that
/// in the destination image, the pixels will be converted
/// in the destination. If the destination image is <code>null</code>,
/// a <code>BufferedImage</code> will be created with an appropriate
/// <code>ColorModel</code>. An <code>IllegalArgumentException</code>
/// might be thrown if the number of arrays in the
/// <code>LookupTable</code> does not meet the restrictions
/// stated in the class comment above, or if the source image
/// has an <code>IndexColorModel</code>. </summary>
/// <param name="src"> the <code>BufferedImage</code> to be filtered </param>
/// <param name="dst"> the <code>BufferedImage</code> in which to
/// store the results of the filter operation </param>
/// <returns> the filtered <code>BufferedImage</code>. </returns>
/// <exception cref="IllegalArgumentException"> if the number of arrays in the
/// <code>LookupTable</code> does not meet the restrictions
/// described in the class comments, or if the source image
/// has an <code>IndexColorModel</code>. </exception>
public BufferedImage Filter(BufferedImage src, BufferedImage dst)
{
ColorModel srcCM = src.ColorModel;
int numBands = srcCM.NumColorComponents;
ColorModel dstCM;
if (srcCM is IndexColorModel)
{
throw new IllegalArgumentException("LookupOp cannot be " + "performed on an indexed image");
}
int numComponents = Ltable.NumComponents;
if (numComponents != 1 && numComponents != srcCM.NumComponents && numComponents != srcCM.NumColorComponents)
{
throw new IllegalArgumentException("Number of arrays in the " + " lookup table (" + numComponents + " is not compatible with the " + " src image: " + src);
}
bool needToConvert = false;
int width = src.Width;
int height = src.Height;
if (dst == null)
{
dst = CreateCompatibleDestImage(src, null);
dstCM = srcCM;
}
else
{
if (width != dst.Width)
{
throw new IllegalArgumentException("Src width (" + width + ") not equal to dst width (" + dst.Width + ")");
}
if (height != dst.Height)
{
throw new IllegalArgumentException("Src height (" + height + ") not equal to dst height (" + dst.Height + ")");
}
dstCM = dst.ColorModel;
if (srcCM.ColorSpace.Type != dstCM.ColorSpace.Type)
{
needToConvert = true;
dst = CreateCompatibleDestImage(src, null);
}
}
BufferedImage origDst = dst;
if (ImagingLib.filter(this, src, dst) == null)
{
// Do it the slow way
WritableRaster srcRaster = src.Raster;
WritableRaster dstRaster = dst.Raster;
if (srcCM.HasAlpha())
{
if (numBands - 1 == numComponents || numComponents == 1)
{
int minx = srcRaster.MinX;
int miny = srcRaster.MinY;
int[] bands = new int[numBands - 1];
for (int i = 0; i < numBands - 1; i++)
{
bands[i] = i;
}
srcRaster = srcRaster.CreateWritableChild(minx, miny, srcRaster.Width, srcRaster.Height, minx, miny, bands);
}
}
if (dstCM.HasAlpha())
{
int dstNumBands = dstRaster.NumBands;
if (dstNumBands - 1 == numComponents || numComponents == 1)
{
int minx = dstRaster.MinX;
int miny = dstRaster.MinY;
int[] bands = new int[numBands - 1];
for (int i = 0; i < numBands - 1; i++)
{
bands[i] = i;
}
dstRaster = dstRaster.CreateWritableChild(minx, miny, dstRaster.Width, dstRaster.Height, minx, miny, bands);
}
}
Filter(srcRaster, dstRaster);
}
if (needToConvert)
{
// ColorModels are not the same
ColorConvertOp ccop = new ColorConvertOp(Hints);
ccop.Filter(dst, origDst);
}
return(origDst);
}
/// <summary>
/// Performs a lookup operation on a <code>Raster</code>.
/// If the destination <code>Raster</code> is <code>null</code>,
/// a new <code>Raster</code> will be created.
/// The <code>IllegalArgumentException</code> might be thrown
/// if the source <code>Raster</code> and the destination
/// <code>Raster</code> do not have the same
/// number of bands or if the number of arrays in the
/// <code>LookupTable</code> does not meet the
/// restrictions stated in the class comment above. </summary>
/// <param name="src"> the source <code>Raster</code> to filter </param>
/// <param name="dst"> the destination <code>WritableRaster</code> for the
/// filtered <code>src</code> </param>
/// <returns> the filtered <code>WritableRaster</code>. </returns>
/// <exception cref="IllegalArgumentException"> if the source and destinations
/// rasters do not have the same number of bands, or the
/// number of arrays in the <code>LookupTable</code> does
/// not meet the restrictions described in the class comments.
/// </exception>
public WritableRaster Filter(Raster src, WritableRaster dst)
{
int numBands = src.NumBands;
int dstLength = dst.NumBands;
int height = src.Height;
int width = src.Width;
int[] srcPix = new int[numBands];
// Create a new destination Raster, if needed
if (dst == null)
{
dst = CreateCompatibleDestRaster(src);
}
else if (height != dst.Height || width != dst.Width)
{
throw new IllegalArgumentException("Width or height of Rasters do not " + "match");
}
dstLength = dst.NumBands;
if (numBands != dstLength)
{
throw new IllegalArgumentException("Number of channels in the src (" + numBands + ") does not match number of channels" + " in the destination (" + dstLength + ")");
}
int numComponents = Ltable.NumComponents;
if (numComponents != 1 && numComponents != src.NumBands)
{
throw new IllegalArgumentException("Number of arrays in the " + " lookup table (" + numComponents + " is not compatible with the " + " src Raster: " + src);
}
if (ImagingLib.filter(this, src, dst) != null)
{
return(dst);
}
// Optimize for cases we know about
if (Ltable is ByteLookupTable)
{
ByteFilter((ByteLookupTable)Ltable, src, dst, width, height, numBands);
}
else if (Ltable is ShortLookupTable)
{
ShortFilter((ShortLookupTable)Ltable, src, dst, width, height, numBands);
}
else
{
// Not one we recognize so do it slowly
int sminX = src.MinX;
int sY = src.MinY;
int dminX = dst.MinX;
int dY = dst.MinY;
for (int y = 0; y < height; y++, sY++, dY++)
{
int sX = sminX;
int dX = dminX;
for (int x = 0; x < width; x++, sX++, dX++)
{
// Find data for all bands at this x,y position
src.GetPixel(sX, sY, srcPix);
// Lookup the data for all bands at this x,y position
Ltable.LookupPixel(srcPix, srcPix);
// Put it back for all bands
dst.SetPixel(dX, dY, srcPix);
}
}
}
return(dst);
}
/// <summary>
/// Transforms the <CODE>Raster</CODE> using the matrix specified in the
/// constructor. An <CODE>IllegalArgumentException</CODE> may be thrown if
/// the number of bands in the source or destination is incompatible with
/// the matrix. See the class comments for more details.
/// <para>
/// If the destination is null, it will be created with a number of bands
/// equalling the number of rows in the matrix. No exception is thrown
/// if the operation causes a data overflow.
///
/// </para>
/// </summary>
/// <param name="src"> The <CODE>Raster</CODE> to be filtered. </param>
/// <param name="dst"> The <CODE>Raster</CODE> in which to store the results
/// of the filter operation.
/// </param>
/// <returns> The filtered <CODE>Raster</CODE>.
/// </returns>
/// <exception cref="IllegalArgumentException"> If the number of bands in the
/// source or destination is incompatible with the matrix. </exception>
public virtual WritableRaster Filter(Raster src, WritableRaster dst)
{
int nBands = src.NumBands;
if (Ncols != nBands && Ncols != (nBands + 1))
{
throw new IllegalArgumentException("Number of columns in the " + "matrix (" + Ncols + ") must be equal to the number" + " of bands ([+1]) in src (" + nBands + ").");
}
if (dst == null)
{
dst = CreateCompatibleDestRaster(src);
}
else if (Nrows != dst.NumBands)
{
throw new IllegalArgumentException("Number of rows in the " + "matrix (" + Nrows + ") must be equal to the number" + " of bands ([+1]) in dst (" + nBands + ").");
}
if (ImagingLib.filter(this, src, dst) != null)
{
return(dst);
}
int[] pixel = null;
int[] dstPixel = new int[dst.NumBands];
float accum;
int sminX = src.MinX;
int sY = src.MinY;
int dminX = dst.MinX;
int dY = dst.MinY;
int sX;
int dX;
if (Ncols == nBands)
{
for (int y = 0; y < src.Height; y++, sY++, dY++)
{
dX = dminX;
sX = sminX;
for (int x = 0; x < src.Width; x++, sX++, dX++)
{
pixel = src.GetPixel(sX, sY, pixel);
for (int r = 0; r < Nrows; r++)
{
accum = 0.0f;
for (int c = 0; c < Ncols; c++)
{
accum += Matrix_Renamed[r][c] * pixel[c];
}
dstPixel[r] = (int)accum;
}
dst.SetPixel(dX, dY, dstPixel);
}
}
}
else
{
// Need to add constant
for (int y = 0; y < src.Height; y++, sY++, dY++)
{
dX = dminX;
sX = sminX;
for (int x = 0; x < src.Width; x++, sX++, dX++)
{
pixel = src.GetPixel(sX, sY, pixel);
for (int r = 0; r < Nrows; r++)
{
accum = 0.0f;
for (int c = 0; c < nBands; c++)
{
accum += Matrix_Renamed[r][c] * pixel[c];
}
dstPixel[r] = (int)(accum + Matrix_Renamed[r][nBands]);
}
dst.SetPixel(dX, dY, dstPixel);
}
}
}
return(dst);
}