/**
* Constructs a color map for specified values.
* The integers 0 and 255 must be valid pixels for the color model.
* @param vmin the minimum value.
* @param vmax the maximum value.
* @param colorModel the index color model.
*/
public ColorMap(double vmin, double vmax, IndexColorModel colorModel)
{
//Check.argument(colorModel.isValid(0),"0 is valid for color model");
//Check.argument(colorModel.isValid(255),"255 is valid for color model");
_vmin = vmin;
_vmax = vmax;
_colorModel = colorModel;
cacheColors();
}
public static bool IsFilterableICM(ColorModel cm)
{
if (cm is IndexColorModel)
{
IndexColorModel icm = (IndexColorModel)cm;
if (icm.MapSize <= 256)
{
return(true);
}
}
return(false);
}
/// <summary>
/// Writes the colour map resulting from the source <tt>IndexColorModel</tt>.
/// </summary>
/// <param name="icm">
/// the source <tt>IndexColorModel</tt> </param>
private void WriteColorMap(IndexColorModel icm)
{
int mapSize = icm.getMapSize();
for (int i = 0; i < mapSize; i++)
{
int rgb = icm.getRGB(i);
byte r = (byte)(rgb >> 16);
byte g = (byte)(rgb >> 8);
byte b = (byte)(rgb);
writer.Write(b);
writer.Write(g);
writer.Write(r);
writer.Write((byte)0);
}
}
/// <summary>
/// Encodes and writes multiple images without colour depth conversion.
/// </summary>
/// <param name="images">
/// the list of source images to be encoded </param>
/// <param name="stream">
/// the output to which the encoded image will be written </param>
internal void Write(java.util.List images, System.IO.Stream stream)
{
writer = new BinaryWriter(stream);
int count = images.size();
// file header 6
WriteFileHeader(count, TYPE_ICON);
// file offset where images start
int fileOffset = 6 + count * 16;
// icon entries 16 * count
for (int i = 0; i < count; i++)
{
BufferedImage imgc = (BufferedImage)images.get(i);
fileOffset += WriteIconEntry(imgc, fileOffset);
}
// images
for (int i = 0; i < count; i++)
{
BufferedImage imgc = (BufferedImage)images.get(i);
// info header
WriteInfoHeader(imgc);
// color map
if (imgc.getColorModel().getPixelSize() <= 8)
{
IndexColorModel icm = (IndexColorModel)imgc.getColorModel();
WriteColorMap(icm);
}
// xor bitmap
WriteXorBitmap(imgc);
// and bitmap
WriteAndBitmap(imgc);
}
}
/// <summary>
/// Filters an IndexColorModel object by running each entry in its
/// color tables through the filterRGB function that RGBImageFilter
/// subclasses must provide. Uses coordinates of -1 to indicate that
/// a color table entry is being filtered rather than an actual
/// pixel value. </summary>
/// <param name="icm"> the IndexColorModel object to be filtered </param>
/// <exception cref="NullPointerException"> if <code>icm</code> is null </exception>
/// <returns> a new IndexColorModel representing the filtered colors </returns>
public virtual IndexColorModel FilterIndexColorModel(IndexColorModel icm)
{
int mapsize = icm.MapSize;
sbyte[] r = new sbyte[mapsize];
sbyte[] g = new sbyte[mapsize];
sbyte[] b = new sbyte[mapsize];
sbyte[] a = new sbyte[mapsize];
icm.GetReds(r);
icm.GetGreens(g);
icm.GetBlues(b);
icm.GetAlphas(a);
int trans = icm.TransparentPixel;
bool needalpha = false;
for (int i = 0; i < mapsize; i++)
{
int rgb = FilterRGB(-1, -1, icm.GetRGB(i));
a[i] = (sbyte)(rgb >> 24);
if (a[i] != (unchecked ((sbyte)0xff)) && i != trans)
{
needalpha = true;
}
r[i] = (sbyte)(rgb >> 16);
g[i] = (sbyte)(rgb >> 8);
b[i] = (sbyte)(rgb >> 0);
}
if (needalpha)
{
return(new IndexColorModel(icm.PixelSize, mapsize, r, g, b, a));
}
else
{
return(new IndexColorModel(icm.PixelSize, mapsize, r, g, b, trans));
}
}
void makeInverseMap(int[] hist, int ncubes)
{
// For each cube in the list of cubes, computes the centroid
// (average value) of the colors enclosed by that cube, and
// then loads the centroids in the color map. Next loads
// "hist" with indices into the color map
int r, g, b;
int color;
float rsum, gsum, bsum;
Cube cube;
byte[] rLUT = new byte[256];
byte[] gLUT = new byte[256];
byte[] bLUT = new byte[256];
for (int k = 0; k <= ncubes - 1; k++)
{
cube = list[k];
rsum = gsum = bsum = (float)0.0;
for (int i = cube.lower; i <= cube.upper; i++)
{
color = histPtr[i];
r = red(color);
rsum += (float)r * (float)hist[color];
g = green(color);
gsum += (float)g * (float)hist[color];
b = blue(color);
bsum += (float)b * (float)hist[color];
}
// Update the color map
r = (int)(rsum / (float)cube.count);
g = (int)(gsum / (float)cube.count);
b = (int)(bsum / (float)cube.count);
#if false
if (r == 248 && g == 248 && b == 248)
{
r = g = b = 255; // Restore white (255,255,255)
}
#endif
rLUT[k] = (byte)r;
gLUT[k] = (byte)g;
bLUT[k] = (byte)b;
}
#if false
cm = new IndexColorModel(8, ncubes, rLUT, gLUT, bLUT);
#else
Color[] aclr = new Color[ncubes];
for (int iclr = 0; iclr < ncubes; iclr++)
{
aclr[iclr] = Color.FromArgb(rLUT[iclr], gLUT[iclr], bLUT[iclr]);
}
m_pal = new Palette(aclr);
#endif
// For each color in each cube, load the corre-
// sponding slot in "hist" with the centroid of the cube.
for (int k = 0; k <= ncubes - 1; k++)
{
cube = list[k];
for (int i = cube.lower; i <= cube.upper; i++)
{
color = histPtr[i];
hist[color] = k;
}
}
}
/// <summary>
/// Writes the colour map resulting from the source <tt>IndexColorModel</tt>.
/// </summary>
/// <param name="icm">
/// the source <tt>IndexColorModel</tt> </param>
private void WriteColorMap(IndexColorModel icm)
{
int mapSize = icm.getMapSize();
for (int i = 0; i < mapSize; i++)
{
int rgb = icm.getRGB(i);
byte r = (byte)(rgb >> 16);
byte g = (byte)(rgb >> 8);
byte b = (byte)(rgb);
writer.Write(b);
writer.Write(g);
writer.Write(r);
writer.Write((byte)0);
}
}
/// <summary>
/// Encodes the <em>AND</em> bitmap for the given image according the its
/// alpha channel (transparency) and writes it to the given output.
/// </summary>
/// <param name="img">
/// the image to encode as the <em>AND</em> bitmap. </param>
private void WriteAndBitmap(BufferedImage img)
{
WritableRaster alpha = img.getAlphaRaster();
// indexed transparency (eg. GIF files)
if (img.getColorModel() is IndexColorModel && img.getColorModel().hasAlpha())
{
int w = img.getWidth();
int h = img.getHeight();
int bytesPerLine = GetBytesPerLine1(w);
byte[] line = new byte[bytesPerLine];
IndexColorModel icm = (IndexColorModel)img.getColorModel();
Raster raster = img.getRaster();
for (int y = h - 1; y >= 0; y--)
{
for (int x = 0; x < w; x++)
{
int bi = x / 8;
int i = x % 8;
// int a = alpha.getSample(x, y, 0);
int p = raster.getSample(x, y, 0);
int a = icm.getAlpha(p);
// invert bit since and mask is applied to xor mask
int b = ~a & 1;
line[bi] = SetBit(line[bi], i, b);
}
writer.Write(line);
}
}
// no transparency
else if (alpha == null)
{
int h = img.getHeight();
int w = img.getWidth();
// calculate number of bytes per line, including 32-bit padding
int bytesPerLine = GetBytesPerLine1(w);
byte[] line = new byte[bytesPerLine];
for (int i = 0; i < bytesPerLine; i++)
{
line[i] = (byte)0;
}
for (int y = h - 1; y >= 0; y--)
{
writer.Write(line);
}
}
// transparency (ARGB, etc. eg. PNG)
else
{
int w = img.getWidth();
int h = img.getHeight();
int bytesPerLine = GetBytesPerLine1(w);
byte[] line = new byte[bytesPerLine];
for (int y = h - 1; y >= 0; y--)
{
for (int x = 0; x < w; x++)
{
int bi = x / 8;
int i = x % 8;
int a = alpha.getSample(x, y, 0);
// invert bit since and mask is applied to xor mask
int b = ~a & 1;
line[bi] = SetBit(line[bi], i, b);
}
writer.Write(line);
}
}
}
/// <summary>
/// Constructs a <code>BufferedImage</code> of one of the predefined
/// image types:
/// TYPE_BYTE_BINARY or TYPE_BYTE_INDEXED.
/// </summary>
public BufferedImage(int @width, int @height, int @imageType, IndexColorModel @cm)
{
}
/**
* Constructs a color map for values in [0,1].
* The integers 0 and 255 must be valid pixels for the color model.
* @param colorModel the index color model.
*/
public ColorMap(IndexColorModel colorModel)
{
this(0.0, 1.0, colorModel);
}
/**
* Sets the index color model for this color map.
* @param colorModel the index color model.
*/
public void setColorModel(IndexColorModel colorModel)
{
_colorModel = colorModel;
cacheColors();
fireColorMapChanged();
}
