/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%                  CCCC   OOO   L       OOO   RRRR   SSSSS                    %
%                 C      O   O  L      O   O  R   R  SS                       %
%                 C      O   O  L      O   O  RRRR    SSS                     %
%                 C      O   O  L      O   O  R R       SS                    %
%                  CCCC   OOO   LLLLL   OOO   R  R   SSSSS                    %
%                                                                             %
%                                                                             %
%                  methods to Count the Colors in an image                    %
%                                                                             %
%                                                                             %
%                                                                             %
%                           Software Design                                   %
%                             John Cristy                                     %
%                              July 1992                                      %
%                                                                             %
%                                                                             %
%  Copyright (C) 2000 imagemagick Studio, a non-profit organization dedicated %
%  to making software imaging solutions freely available.                     %
%                                                                             %
%  Permission is hereby granted, free of charge, to any person obtaining a    %
%  copy of this software and associated documentation files ("imagemagick"),  %
%  to deal in imagemagick without restriction, including without limitation   %
%  the rights to use, copy, modify, merge, publish, distribute, sublicense,   %
%  and/or sell copies of imagemagick, and to permit persons to whom the       %
%  imagemagick is furnished to do so, subject to the following conditions:    %
%                                                                             %
%  the above copyright notice and this permission notice shall be included in %
%  all copies or substantial portions of imagemagick.                         %
%                                                                             %
%  the software is provided "as is", without warranty of any kind, express or %
%  implied, including but not limited to the warranties of merchantability,   %
%  fitness for a particular purpose and noninfringement.  in no event shall   %
%  imagemagick Studio be liable for any claim, damages or other liability,    %
%  whether in an action of contract, tort or otherwise, arising from, out of  %
%  or in connection with imagemagick or the use or other dealings in          %
%  imagemagick.                                                               %
%                                                                             %
%  Except as contained in this notice, the name of the imagemagick Studio     %
%  shall not be used in advertising or otherwise to promote the sale, use or  %
%  other dealings in imagemagick without prior written authorization from the %
%  imagemagick Studio.                                                        %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
%
*/

/*
  include declarations.
*/
#include "magick.h"
#include "defines.h"
#if defined(HasX11)
#include "xwindows.h"
#endif

/*
  Structures.
*/
typedef struct _ColorPacket
{
  Quantum
    red,
    green,
    blue;

  unsigned short
    index;

  unsigned long
    count;
} ColorPacket;

typedef struct _NodeInfo
{
  unsigned char
    level;

  unsigned long
    number_unique;

  ColorPacket
    *list;

  struct _NodeInfo
    *child[8];
} NodeInfo;

typedef struct _Nodes
{
  NodeInfo
    nodes[NodesInAList];

  struct _Nodes
    *next;
} Nodes;

typedef struct _CubeInfo
{
  NodeInfo
    *root;

  unsigned int
    progress;

  unsigned long
    colors;

  unsigned int
    free_nodes;

  NodeInfo
    *node_info;

  Nodes
    *node_list;
} CubeInfo;

/*
  Color list.
*/
#define NumberXColors  757

const ColorlistInfo
  XColorlist[NumberXColors] =
  {
    { "alice blue", 240, 248, 255 },
    { "aliceblue", 240, 248, 255 },
    { "antique white", 250, 235, 215 },
    { "antiquewhite", 250, 235, 215 },
    { "antiquewhite1", 255, 239, 219 },
    { "antiquewhite2", 238, 223, 204 },
    { "antiquewhite3", 205, 192, 176 },
    { "antiquewhite4", 139, 131, 120 },
    { "aquamarine", 127, 255, 212 },
    { "aquamarine1", 127, 255, 212 },
    { "aquamarine2", 118, 238, 198 },
    { "aquamarine3", 102, 205, 170 },
    { "aquamarine4", 69, 139, 116 },
    { "azure", 240, 255, 255 },
    { "azure1", 240, 255, 255 },
    { "azure2", 224, 238, 238 },
    { "azure3", 193, 205, 205 },
    { "azure4", 131, 139, 139 },
    { "beige", 245, 245, 220 },
    { "bisque", 255, 228, 196 },
    { "bisque1", 255, 228, 196 },
    { "bisque2", 238, 213, 183 },
    { "bisque3", 205, 183, 158 },
    { "bisque4", 139, 125, 107 },
    { "black", 0, 0, 0 },
    { "blanched almond", 255, 235, 205 },
    { "blanchedalmond", 255, 235, 205 },
    { "blue", 0, 0, 255 },
    { "blue violet", 138, 43, 226 },
    { "blue1", 0, 0, 255 },
    { "blue2", 0, 0, 238 },
    { "blue3", 0, 0, 205 },
    { "blue4", 0, 0, 139 },
    { "blueviolet", 138, 43, 226 },
    { "brown", 165, 42, 42 },
    { "brown1", 255, 64, 64 },
    { "brown2", 238, 59, 59 },
    { "brown3", 205, 51, 51 },
    { "brown4", 139, 35, 35 },
    { "burlywood", 222, 184, 135 },
    { "burlywood1", 255, 211, 155 },
    { "burlywood2", 238, 197, 145 },
    { "burlywood3", 205, 170, 125 },
    { "burlywood4", 139, 115, 85 },
    { "cadet blue", 95, 158, 160 },
    { "cadetblue", 95, 158, 160 },
    { "cadetblue1", 152, 245, 255 },
    { "cadetblue2", 142, 229, 238 },
    { "cadetblue3", 122, 197, 205 },
    { "cadetblue4", 83, 134, 139 },
    { "chartreuse", 127, 255, 0 },
    { "chartreuse1", 127, 255, 0 },
    { "chartreuse2", 118, 238, 0 },
    { "chartreuse3", 102, 205, 0 },
    { "chartreuse4", 69, 139, 0 },
    { "chocolate", 210, 105, 30 },
    { "chocolate1", 255, 127, 36 },
    { "chocolate2", 238, 118, 33 },
    { "chocolate3", 205, 102, 29 },
    { "chocolate4", 139, 69, 19 },
    { "coral", 255, 127, 80 },
    { "coral1", 255, 114, 86 },
    { "coral2", 238, 106, 80 },
    { "coral3", 205, 91, 69 },
    { "coral4", 139, 62, 47 },
    { "cornflower blue", 100, 149, 237 },
    { "cornflowerblue", 100, 149, 237 },
    { "cornsilk", 255, 248, 220 },
    { "cornsilk1", 255, 248, 220 },
    { "cornsilk2", 238, 232, 205 },
    { "cornsilk3", 205, 200, 177 },
    { "cornsilk4", 139, 136, 120 },
    { "crimson", 220, 20, 60 },
    { "cyan", 0, 255, 255 },
    { "cyan1", 0, 255, 255 },
    { "cyan2", 0, 238, 238 },
    { "cyan3", 0, 205, 205 },
    { "cyan4", 0, 139, 139 },
    { "dark blue", 0, 0, 139 },
    { "dark cyan", 0, 139, 139 },
    { "dark goldenrod", 184, 134, 11 },
    { "dark gray", 169, 169, 169 },
    { "dark green", 0, 100, 0 },
    { "dark grey", 169, 169, 169 },
    { "dark khaki", 189, 183, 107 },
    { "dark magenta", 139, 0, 139 },
    { "dark olive green", 85, 107, 47 },
    { "dark orange", 255, 140, 0 },
    { "dark orchid", 153, 50, 204 },
    { "dark red", 139, 0, 0 },
    { "dark salmon", 233, 150, 122 },
    { "dark sea green", 143, 188, 143 },
    { "dark slate blue", 72, 61, 139 },
    { "dark slate gray", 47, 79, 79 },
    { "dark slate grey", 47, 79, 79 },
    { "dark turquoise", 0, 206, 209 },
    { "dark violet", 148, 0, 211 },
    { "darkblue", 0, 0, 139 },
    { "darkcyan", 0, 139, 139 },
    { "darkgoldenrod", 184, 134, 11 },
    { "darkgoldenrod1", 255, 185, 15 },
    { "darkgoldenrod2", 238, 173, 14 },
    { "darkgoldenrod3", 205, 149, 12 },
    { "darkgoldenrod4", 139, 101, 8 },
    { "darkgray", 169, 169, 169 },
    { "darkgreen", 0, 100, 0 },
    { "darkgrey", 169, 169, 169 },
    { "darkkhaki", 189, 183, 107 },
    { "darkmagenta", 139, 0, 139 },
    { "darkolivegreen", 85, 107, 47 },
    { "darkolivegreen1", 202, 255, 112 },
    { "darkolivegreen2", 188, 238, 104 },
    { "darkolivegreen3", 162, 205, 90 },
    { "darkolivegreen4", 110, 139, 61 },
    { "darkorange", 255, 140, 0 },
    { "darkorange1", 255, 127, 0 },
    { "darkorange2", 238, 118, 0 },
    { "darkorange3", 205, 102, 0 },
    { "darkorange4", 139, 69, 0 },
    { "darkorchid", 153, 50, 204 },
    { "darkorchid1", 191, 62, 255 },
    { "darkorchid2", 178, 58, 238 },
    { "darkorchid3", 154, 50, 205 },
    { "darkorchid4", 104, 34, 139 },
    { "darkred", 139, 0, 0 },
    { "darksalmon", 233, 150, 122 },
    { "darkseagreen", 143, 188, 143 },
    { "darkseagreen1", 193, 255, 193 },
    { "darkseagreen2", 180, 238, 180 },
    { "darkseagreen3", 155, 205, 155 },
    { "darkseagreen4", 105, 139, 105 },
    { "darkslateblue", 72, 61, 139 },
    { "darkslategray", 47, 79, 79 },
    { "darkslategray1", 151, 255, 255 },
    { "darkslategray2", 141, 238, 238 },
    { "darkslategray3", 121, 205, 205 },
    { "darkslategray4", 82, 139, 139 },
    { "darkslategrey", 47, 79, 79 },
    { "darkturquoise", 0, 206, 209 },
    { "darkviolet", 148, 0, 211 },
    { "deep pink", 255, 20, 147 },
    { "deep sky blue", 0, 191, 255 },
    { "deeppink", 255, 20, 147 },
    { "deeppink1", 255, 20, 147 },
    { "deeppink2", 238, 18, 137 },
    { "deeppink3", 205, 16, 118 },
    { "deeppink4", 139, 10, 80 },
    { "deepskyblue", 0, 191, 255 },
    { "deepskyblue1", 0, 191, 255 },
    { "deepskyblue2", 0, 178, 238 },
    { "deepskyblue3", 0, 154, 205 },
    { "deepskyblue4", 0, 104, 139 },
    { "dim gray", 105, 105, 105 },
    { "dim grey", 105, 105, 105 },
    { "dimgray", 105, 105, 105 },
    { "dimgrey", 105, 105, 105 },
    { "dodger blue", 30, 144, 255 },
    { "dodgerblue", 30, 144, 255 },
    { "dodgerblue1", 30, 144, 255 },
    { "dodgerblue2", 28, 134, 238 },
    { "dodgerblue3", 24, 116, 205 },
    { "dodgerblue4", 16, 78, 139 },
    { "firebrick", 178, 34, 34 },
    { "firebrick1", 255, 48, 48 },
    { "firebrick2", 238, 44, 44 },
    { "firebrick3", 205, 38, 38 },
    { "firebrick4", 139, 26, 26 },
    { "floral white", 255, 250, 240 },
    { "floralwhite", 255, 250, 240 },
    { "forest green", 34, 139, 34 },
    { "forestgreen", 34, 139, 34 },
    { "fractal", 128, 128, 128 },
    { "gainsboro", 220, 220, 220 },
    { "ghost white", 248, 248, 255 },
    { "ghostwhite", 248, 248, 255 },
    { "gold", 255, 215, 0 },
    { "gold1", 255, 215, 0 },
    { "gold2", 238, 201, 0 },
    { "gold3", 205, 173, 0 },
    { "gold4", 139, 117, 0 },
    { "goldenrod", 218, 165, 32 },
    { "goldenrod1", 255, 193, 37 },
    { "goldenrod2", 238, 180, 34 },
    { "goldenrod3", 205, 155, 29 },
    { "goldenrod4", 139, 105, 20 },
    { "gray", 190, 190, 190 },
    { "gray0", 0, 0, 0 },
    { "gray1", 3, 3, 3 },
    { "gray10", 26, 26, 26 },
    { "gray100", 255, 255, 255 },
    { "gray11", 28, 28, 28 },
    { "gray12", 31, 31, 31 },
    { "gray13", 33, 33, 33 },
    { "gray14", 36, 36, 36 },
    { "gray15", 38, 38, 38 },
    { "gray16", 41, 41, 41 },
    { "gray17", 43, 43, 43 },
    { "gray18", 46, 46, 46 },
    { "gray19", 48, 48, 48 },
    { "gray2", 5, 5, 5 },
    { "gray20", 51, 51, 51 },
    { "gray21", 54, 54, 54 },
    { "gray22", 56, 56, 56 },
    { "gray23", 59, 59, 59 },
    { "gray24", 61, 61, 61 },
    { "gray25", 64, 64, 64 },
    { "gray26", 66, 66, 66 },
    { "gray27", 69, 69, 69 },
    { "gray28", 71, 71, 71 },
    { "gray29", 74, 74, 74 },
    { "gray3", 8, 8, 8 },
    { "gray30", 77, 77, 77 },
    { "gray31", 79, 79, 79 },
    { "gray32", 82, 82, 82 },
    { "gray33", 84, 84, 84 },
    { "gray34", 87, 87, 87 },
    { "gray35", 89, 89, 89 },
    { "gray36", 92, 92, 92 },
    { "gray37", 94, 94, 94 },
    { "gray38", 97, 97, 97 },
    { "gray39", 99, 99, 99 },
    { "gray4", 10, 10, 10 },
    { "gray40", 102, 102, 102 },
    { "gray41", 105, 105, 105 },
    { "gray42", 107, 107, 107 },
    { "gray43", 110, 110, 110 },
    { "gray44", 112, 112, 112 },
    { "gray45", 115, 115, 115 },
    { "gray46", 117, 117, 117 },
    { "gray47", 120, 120, 120 },
    { "gray48", 122, 122, 122 },
    { "gray49", 125, 125, 125 },
    { "gray5", 13, 13, 13 },
    { "gray50", 127, 127, 127 },
    { "gray51", 130, 130, 130 },
    { "gray52", 133, 133, 133 },
    { "gray53", 135, 135, 135 },
    { "gray54", 138, 138, 138 },
    { "gray55", 140, 140, 140 },
    { "gray56", 143, 143, 143 },
    { "gray57", 145, 145, 145 },
    { "gray58", 148, 148, 148 },
    { "gray59", 150, 150, 150 },
    { "gray6", 15, 15, 15 },
    { "gray60", 153, 153, 153 },
    { "gray61", 156, 156, 156 },
    { "gray62", 158, 158, 158 },
    { "gray63", 161, 161, 161 },
    { "gray64", 163, 163, 163 },
    { "gray65", 166, 166, 166 },
    { "gray66", 168, 168, 168 },
    { "gray67", 171, 171, 171 },
    { "gray68", 173, 173, 173 },
    { "gray69", 176, 176, 176 },
    { "gray7", 18, 18, 18 },
    { "gray70", 179, 179, 179 },
    { "gray71", 181, 181, 181 },
    { "gray72", 184, 184, 184 },
    { "gray73", 186, 186, 186 },
    { "gray74", 189, 189, 189 },
    { "gray75", 191, 191, 191 },
    { "gray76", 194, 194, 194 },
    { "gray77", 196, 196, 196 },
    { "gray78", 199, 199, 199 },
    { "gray79", 201, 201, 201 },
    { "gray8", 20, 20, 20 },
    { "gray80", 204, 204, 204 },
    { "gray81", 207, 207, 207 },
    { "gray82", 209, 209, 209 },
    { "gray83", 212, 212, 212 },
    { "gray84", 214, 214, 214 },
    { "gray85", 217, 217, 217 },
    { "gray86", 219, 219, 219 },
    { "gray87", 222, 222, 222 },
    { "gray88", 224, 224, 224 },
    { "gray89", 227, 227, 227 },
    { "gray9", 23, 23, 23 },
    { "gray90", 229, 229, 229 },
    { "gray91", 232, 232, 232 },
    { "gray92", 235, 235, 235 },
    { "gray93", 237, 237, 237 },
    { "gray94", 240, 240, 240 },
    { "gray95", 242, 242, 242 },
    { "gray96", 245, 245, 245 },
    { "gray97", 247, 247, 247 },
    { "gray98", 250, 250, 250 },
    { "gray99", 252, 252, 252 },
    { "green", 0, 255, 0 },
    { "green yellow", 173, 255, 47 },
    { "green1", 0, 255, 0 },
    { "green2", 0, 238, 0 },
    { "green3", 0, 205, 0 },
    { "green4", 0, 139, 0 },
    { "greenyellow", 173, 255, 47 },
    { "grey", 190, 190, 190 },
    { "grey0", 0, 0, 0 },
    { "grey1", 3, 3, 3 },
    { "grey10", 26, 26, 26 },
    { "grey100", 255, 255, 255 },
    { "grey11", 28, 28, 28 },
    { "grey12", 31, 31, 31 },
    { "grey13", 33, 33, 33 },
    { "grey14", 36, 36, 36 },
    { "grey15", 38, 38, 38 },
    { "grey16", 41, 41, 41 },
    { "grey17", 43, 43, 43 },
    { "grey18", 46, 46, 46 },
    { "grey19", 48, 48, 48 },
    { "grey2", 5, 5, 5 },
    { "grey20", 51, 51, 51 },
    { "grey21", 54, 54, 54 },
    { "grey22", 56, 56, 56 },
    { "grey23", 59, 59, 59 },
    { "grey24", 61, 61, 61 },
    { "grey25", 64, 64, 64 },
    { "grey26", 66, 66, 66 },
    { "grey27", 69, 69, 69 },
    { "grey28", 71, 71, 71 },
    { "grey29", 74, 74, 74 },
    { "grey3", 8, 8, 8 },
    { "grey30", 77, 77, 77 },
    { "grey31", 79, 79, 79 },
    { "grey32", 82, 82, 82 },
    { "grey33", 84, 84, 84 },
    { "grey34", 87, 87, 87 },
    { "grey35", 89, 89, 89 },
    { "grey36", 92, 92, 92 },
    { "grey37", 94, 94, 94 },
    { "grey38", 97, 97, 97 },
    { "grey39", 99, 99, 99 },
    { "grey4", 10, 10, 10 },
    { "grey40", 102, 102, 102 },
    { "grey41", 105, 105, 105 },
    { "grey42", 107, 107, 107 },
    { "grey43", 110, 110, 110 },
    { "grey44", 112, 112, 112 },
    { "grey45", 115, 115, 115 },
    { "grey46", 117, 117, 117 },
    { "grey47", 120, 120, 120 },
    { "grey48", 122, 122, 122 },
    { "grey49", 125, 125, 125 },
    { "grey5", 13, 13, 13 },
    { "grey50", 127, 127, 127 },
    { "grey51", 130, 130, 130 },
    { "grey52", 133, 133, 133 },
    { "grey53", 135, 135, 135 },
    { "grey54", 138, 138, 138 },
    { "grey55", 140, 140, 140 },
    { "grey56", 143, 143, 143 },
    { "grey57", 145, 145, 145 },
    { "grey58", 148, 148, 148 },
    { "grey59", 150, 150, 150 },
    { "grey6", 15, 15, 15 },
    { "grey60", 153, 153, 153 },
    { "grey61", 156, 156, 156 },
    { "grey62", 158, 158, 158 },
    { "grey63", 161, 161, 161 },
    { "grey64", 163, 163, 163 },
    { "grey65", 166, 166, 166 },
    { "grey66", 168, 168, 168 },
    { "grey67", 171, 171, 171 },
    { "grey68", 173, 173, 173 },
    { "grey69", 176, 176, 176 },
    { "grey7", 18, 18, 18 },
    { "grey70", 179, 179, 179 },
    { "grey71", 181, 181, 181 },
    { "grey72", 184, 184, 184 },
    { "grey73", 186, 186, 186 },
    { "grey74", 189, 189, 189 },
    { "grey75", 191, 191, 191 },
    { "grey76", 194, 194, 194 },
    { "grey77", 196, 196, 196 },
    { "grey78", 199, 199, 199 },
    { "grey79", 201, 201, 201 },
    { "grey8", 20, 20, 20 },
    { "grey80", 204, 204, 204 },
    { "grey81", 207, 207, 207 },
    { "grey82", 209, 209, 209 },
    { "grey83", 212, 212, 212 },
    { "grey84", 214, 214, 214 },
    { "grey85", 217, 217, 217 },
    { "grey86", 219, 219, 219 },
    { "grey87", 222, 222, 222 },
    { "grey88", 224, 224, 224 },
    { "grey89", 227, 227, 227 },
    { "grey9", 23, 23, 23 },
    { "grey90", 229, 229, 229 },
    { "grey91", 232, 232, 232 },
    { "grey92", 235, 235, 235 },
    { "grey93", 237, 237, 237 },
    { "grey94", 240, 240, 240 },
    { "grey95", 242, 242, 242 },
    { "grey96", 245, 245, 245 },
    { "grey97", 247, 247, 247 },
    { "grey98", 250, 250, 250 },
    { "grey99", 252, 252, 252 },
    { "honeydew", 240, 255, 240 },
    { "honeydew1", 240, 255, 240 },
    { "honeydew2", 224, 238, 224 },
    { "honeydew3", 193, 205, 193 },
    { "honeydew4", 131, 139, 131 },
    { "hot pink", 255, 105, 180 },
    { "hotpink", 255, 105, 180 },
    { "hotpink1", 255, 110, 180 },
    { "hotpink2", 238, 106, 167 },
    { "hotpink3", 205, 96, 144 },
    { "hotpink4", 139, 58, 98 },
    { "indian red", 205, 92, 92 },
    { "indianred", 205, 92, 92 },
    { "indianred1", 255, 106, 106 },
    { "indianred2", 238, 99, 99 },
    { "indianred3", 205, 85, 85 },
    { "indianred4", 139, 58, 58 },
    { "indigo", 75, 0, 130 },
    { "indigo2", 33, 136, 104 },
    { "ivory", 255, 255, 240 },
    { "ivory1", 255, 255, 240 },
    { "ivory2", 238, 238, 224 },
    { "ivory3", 205, 205, 193 },
    { "ivory4", 139, 139, 131 },
    { "khaki", 240, 230, 140 },
    { "khaki1", 255, 246, 143 },
    { "khaki2", 238, 230, 133 },
    { "khaki3", 205, 198, 115 },
    { "khaki4", 139, 134, 78 },
    { "lavender", 230, 230, 250 },
    { "lavender blush", 255, 240, 245 },
    { "lavenderblush", 255, 240, 245 },
    { "lavenderblush1", 255, 240, 245 },
    { "lavenderblush2", 238, 224, 229 },
    { "lavenderblush3", 205, 193, 197 },
    { "lavenderblush4", 139, 131, 134 },
    { "lawn green", 124, 252, 0 },
    { "lawngreen", 124, 252, 0 },
    { "lemon chiffon", 255, 250, 205 },
    { "lemonchiffon", 255, 250, 205 },
    { "lemonchiffon1", 255, 250, 205 },
    { "lemonchiffon2", 238, 233, 191 },
    { "lemonchiffon3", 205, 201, 165 },
    { "lemonchiffon4", 139, 137, 112 },
    { "light blue", 173, 216, 230 },
    { "light coral", 240, 128, 128 },
    { "light cyan", 224, 255, 255 },
    { "light goldenrod", 238, 221, 130 },
    { "light goldenrod yellow", 250, 250, 210 },
    { "light gray", 211, 211, 211 },
    { "light green", 144, 238, 144 },
    { "light grey", 211, 211, 211 },
    { "light pink", 255, 182, 193 },
    { "light salmon", 255, 160, 122 },
    { "light sea green", 32, 178, 170 },
    { "light sky blue", 135, 206, 250 },
    { "light slate blue", 132, 112, 255 },
    { "light slate gray", 119, 136, 153 },
    { "light slate grey", 119, 136, 153 },
    { "light steel blue", 176, 196, 222 },
    { "light yellow", 255, 255, 224 },
    { "lightblue", 173, 216, 230 },
    { "lightblue1", 191, 239, 255 },
    { "lightblue2", 178, 223, 238 },
    { "lightblue3", 154, 192, 205 },
    { "lightblue4", 104, 131, 139 },
    { "lightcoral", 240, 128, 128 },
    { "lightcyan", 224, 255, 255 },
    { "lightcyan1", 224, 255, 255 },
    { "lightcyan2", 209, 238, 238 },
    { "lightcyan3", 180, 205, 205 },
    { "lightcyan4", 122, 139, 139 },
    { "lightgoldenrod", 238, 221, 130 },
    { "lightgoldenrod1", 255, 236, 139 },
    { "lightgoldenrod2", 238, 220, 130 },
    { "lightgoldenrod3", 205, 190, 112 },
    { "lightgoldenrod4", 139, 129, 76 },
    { "lightgoldenrodyellow", 250, 250, 210 },
    { "lightgray", 211, 211, 211 },
    { "lightgreen", 144, 238, 144 },
    { "lightgrey", 211, 211, 211 },
    { "lightpink", 255, 182, 193 },
    { "lightpink1", 255, 174, 185 },
    { "lightpink2", 238, 162, 173 },
    { "lightpink3", 205, 140, 149 },
    { "lightpink4", 139, 95, 101 },
    { "lightsalmon", 255, 160, 122 },
    { "lightsalmon1", 255, 160, 122 },
    { "lightsalmon2", 238, 149, 114 },
    { "lightsalmon3", 205, 129, 98 },
    { "lightsalmon4", 139, 87, 66 },
    { "lightseagreen", 32, 178, 170 },
    { "lightskyblue", 135, 206, 250 },
    { "lightskyblue1", 176, 226, 255 },
    { "lightskyblue2", 164, 211, 238 },
    { "lightskyblue3", 141, 182, 205 },
    { "lightskyblue4", 96, 123, 139 },
    { "lightslateblue", 132, 112, 255 },
    { "lightslategray", 119, 136, 153 },
    { "lightslategrey", 119, 136, 153 },
    { "lightsteelblue", 176, 196, 222 },
    { "lightsteelblue1", 202, 225, 255 },
    { "lightsteelblue2", 188, 210, 238 },
    { "lightsteelblue3", 162, 181, 205 },
    { "lightsteelblue4", 110, 123, 139 },
    { "lightyellow", 255, 255, 224 },
    { "lightyellow1", 255, 255, 224 },
    { "lightyellow2", 238, 238, 209 },
    { "lightyellow3", 205, 205, 180 },
    { "lightyellow4", 139, 139, 122 },
    { "lime green", 50, 205, 50 },
    { "limegreen", 50, 205, 50 },
    { "linen", 250, 240, 230 },
    { "magenta", 255, 0, 255 },
    { "magenta1", 255, 0, 255 },
    { "magenta2", 238, 0, 238 },
    { "magenta3", 205, 0, 205 },
    { "magenta4", 139, 0, 139 },
    { "maroon", 176, 48, 96 },
    { "maroon1", 255, 52, 179 },
    { "maroon2", 238, 48, 167 },
    { "maroon3", 205, 41, 144 },
    { "maroon4", 139, 28, 98 },
    { "medium aquamarine", 102, 205, 170 },
    { "medium blue", 0, 0, 205 },
    { "medium orchid", 186, 85, 211 },
    { "medium purple", 147, 112, 219 },
    { "medium sea green", 60, 179, 113 },
    { "medium slate blue", 123, 104, 238 },
    { "medium spring green", 0, 250, 154 },
    { "medium turquoise", 72, 209, 204 },
    { "medium violet red", 199, 21, 133 },
    { "mediumaquamarine", 102, 205, 170 },
    { "mediumblue", 0, 0, 205 },
    { "mediumorchid", 186, 85, 211 },
    { "mediumorchid1", 224, 102, 255 },
    { "mediumorchid2", 209, 95, 238 },
    { "mediumorchid3", 180, 82, 205 },
    { "mediumorchid4", 122, 55, 139 },
    { "mediumpurple", 147, 112, 219 },
    { "mediumpurple1", 171, 130, 255 },
    { "mediumpurple2", 159, 121, 238 },
    { "mediumpurple3", 137, 104, 205 },
    { "mediumpurple4", 93, 71, 139 },
    { "mediumseagreen", 60, 179, 113 },
    { "mediumslateblue", 123, 104, 238 },
    { "mediumspringgreen", 0, 250, 154 },
    { "mediumturquoise", 72, 209, 204 },
    { "mediumvioletred", 199, 21, 133 },
    { "midnight blue", 25, 25, 112 },
    { "midnightblue", 25, 25, 112 },
    { "mint cream", 245, 255, 250 },
    { "mintcream", 245, 255, 250 },
    { "misty rose", 255, 228, 225 },
    { "mistyrose", 255, 228, 225 },
    { "mistyrose1", 255, 228, 225 },
    { "mistyrose2", 238, 213, 210 },
    { "mistyrose3", 205, 183, 181 },
    { "mistyrose4", 139, 125, 123 },
    { "moccasin", 255, 228, 181 },
    { "navajo white", 255, 222, 173 },
    { "navajowhite", 255, 222, 173 },
    { "navajowhite1", 255, 222, 173 },
    { "navajowhite2", 238, 207, 161 },
    { "navajowhite3", 205, 179, 139 },
    { "navajowhite4", 139, 121, 94 },
    { "navy", 0, 0, 128 },
    { "navy blue", 0, 0, 128 },
    { "navyblue", 0, 0, 128 },
    { "old lace", 253, 245, 230 },
    { "oldlace", 253, 245, 230 },
    { "olive drab", 107, 142, 35 },
    { "olivedrab", 107, 142, 35 },
    { "olivedrab1", 192, 255, 62 },
    { "olivedrab2", 179, 238, 58 },
    { "olivedrab3", 154, 205, 50 },
    { "olivedrab4", 105, 139, 34 },
    { "orange", 255, 165, 0 },
    { "orange red", 255, 69, 0 },
    { "orange1", 255, 165, 0 },
    { "orange2", 238, 154, 0 },
    { "orange3", 205, 133, 0 },
    { "orange4", 139, 90, 0 },
    { "orangered", 255, 69, 0 },
    { "orangered1", 255, 69, 0 },
    { "orangered2", 238, 64, 0 },
    { "orangered3", 205, 55, 0 },
    { "orangered4", 139, 37, 0 },
    { "orchid", 218, 112, 214 },
    { "orchid1", 255, 131, 250 },
    { "orchid2", 238, 122, 233 },
    { "orchid3", 205, 105, 201 },
    { "orchid4", 139, 71, 137 },
    { "pale goldenrod", 238, 232, 170 },
    { "pale green", 152, 251, 152 },
    { "pale turquoise", 175, 238, 238 },
    { "pale violet red", 219, 112, 147 },
    { "palegoldenrod", 238, 232, 170 },
    { "palegreen", 152, 251, 152 },
    { "palegreen1", 154, 255, 154 },
    { "palegreen2", 144, 238, 144 },
    { "palegreen3", 124, 205, 124 },
    { "palegreen4", 84, 139, 84 },
    { "paleturquoise", 175, 238, 238 },
    { "paleturquoise1", 187, 255, 255 },
    { "paleturquoise2", 174, 238, 238 },
    { "paleturquoise3", 150, 205, 205 },
    { "paleturquoise4", 102, 139, 139 },
    { "palevioletred", 219, 112, 147 },
    { "palevioletred1", 255, 130, 171 },
    { "palevioletred2", 238, 121, 159 },
    { "palevioletred3", 205, 104, 137 },
    { "palevioletred4", 139, 71, 93 },
    { "papaya whip", 255, 239, 213 },
    { "papayawhip", 255, 239, 213 },
    { "peach puff", 255, 218, 185 },
    { "peachpuff", 255, 218, 185 },
    { "peachpuff1", 255, 218, 185 },
    { "peachpuff2", 238, 203, 173 },
    { "peachpuff3", 205, 175, 149 },
    { "peachpuff4", 139, 119, 101 },
    { "peru", 205, 133, 63 },
    { "pink", 255, 192, 203 },
    { "pink1", 255, 181, 197 },
    { "pink2", 238, 169, 184 },
    { "pink3", 205, 145, 158 },
    { "pink4", 139, 99, 108 },
    { "plum", 221, 160, 221 },
    { "plum1", 255, 187, 255 },
    { "plum2", 238, 174, 238 },
    { "plum3", 205, 150, 205 },
    { "plum4", 139, 102, 139 },
    { "powder blue", 176, 224, 230 },
    { "powderblue", 176, 224, 230 },
    { "purple", 160, 32, 240 },
    { "purple1", 155, 48, 255 },
    { "purple2", 145, 44, 238 },
    { "purple3", 125, 38, 205 },
    { "purple4", 85, 26, 139 },
    { "red", 255, 0, 0 },
    { "red1", 255, 0, 0 },
    { "red2", 238, 0, 0 },
    { "red3", 205, 0, 0 },
    { "red4", 139, 0, 0 },
    { "rosy brown", 188, 143, 143 },
    { "rosybrown", 188, 143, 143 },
    { "rosybrown1", 255, 193, 193 },
    { "rosybrown2", 238, 180, 180 },
    { "rosybrown3", 205, 155, 155 },
    { "rosybrown4", 139, 105, 105 },
    { "royal blue", 65, 105, 225 },
    { "royalblue", 65, 105, 225 },
    { "royalblue1", 72, 118, 255 },
    { "royalblue2", 67, 110, 238 },
    { "royalblue3", 58, 95, 205 },
    { "royalblue4", 39, 64, 139 },
    { "saddle brown", 139, 69, 19 },
    { "saddlebrown", 139, 69, 19 },
    { "salmon", 250, 128, 114 },
    { "salmon1", 255, 140, 105 },
    { "salmon2", 238, 130, 98 },
    { "salmon3", 205, 112, 84 },
    { "salmon4", 139, 76, 57 },
    { "sandy brown", 244, 164, 96 },
    { "sandybrown", 244, 164, 96 },
    { "sea green", 46, 139, 87 },
    { "seagreen", 46, 139, 87 },
    { "seagreen1", 84, 255, 159 },
    { "seagreen2", 78, 238, 148 },
    { "seagreen3", 67, 205, 128 },
    { "seagreen4", 46, 139, 87 },
    { "seashell", 255, 245, 238 },
    { "seashell1", 255, 245, 238 },
    { "seashell2", 238, 229, 222 },
    { "seashell3", 205, 197, 191 },
    { "seashell4", 139, 134, 130 },
    { "sienna", 160, 82, 45 },
    { "sienna1", 255, 130, 71 },
    { "sienna2", 238, 121, 66 },
    { "sienna3", 205, 104, 57 },
    { "sienna4", 139, 71, 38 },
    { "sky blue", 135, 206, 235 },
    { "skyblue", 135, 206, 235 },
    { "skyblue1", 135, 206, 255 },
    { "skyblue2", 126, 192, 238 },
    { "skyblue3", 108, 166, 205 },
    { "skyblue4", 74, 112, 139 },
    { "slate blue", 106, 90, 205 },
    { "slate gray", 112, 128, 144 },
    { "slate grey", 112, 128, 144 },
    { "slateblue", 106, 90, 205 },
    { "slateblue1", 131, 111, 255 },
    { "slateblue2", 122, 103, 238 },
    { "slateblue3", 105, 89, 205 },
    { "slateblue4", 71, 60, 139 },
    { "slategray", 112, 128, 144 },
    { "slategray1", 198, 226, 255 },
    { "slategray2", 185, 211, 238 },
    { "slategray3", 159, 182, 205 },
    { "slategray4", 108, 123, 139 },
    { "slategrey", 112, 128, 144 },
    { "snow", 255, 250, 250 },
    { "snow1", 255, 250, 250 },
    { "snow2", 238, 233, 233 },
    { "snow3", 205, 201, 201 },
    { "snow4", 139, 137, 137 },
    { "spring green", 0, 255, 127 },
    { "springgreen", 0, 255, 127 },
    { "springgreen1", 0, 255, 127 },
    { "springgreen2", 0, 238, 118 },
    { "springgreen3", 0, 205, 102 },
    { "springgreen4", 0, 139, 69 },
    { "steel blue", 70, 130, 180 },
    { "steelblue", 70, 130, 180 },
    { "steelblue1", 99, 184, 255 },
    { "steelblue2", 92, 172, 238 },
    { "steelblue3", 79, 148, 205 },
    { "steelblue4", 54, 100, 139 },
    { "tan", 210, 180, 140 },
    { "tan1", 255, 165, 79 },
    { "tan2", 238, 154, 73 },
    { "tan3", 205, 133, 63 },
    { "tan4", 139, 90, 43 },
    { "thistle", 216, 191, 216 },
    { "thistle1", 255, 225, 255 },
    { "thistle2", 238, 210, 238 },
    { "thistle3", 205, 181, 205 },
    { "thistle4", 139, 123, 139 },
    { "tomato", 255, 99, 71 },
    { "tomato1", 255, 99, 71 },
    { "tomato2", 238, 92, 66 },
    { "tomato3", 205, 79, 57 },
    { "tomato4", 139, 54, 38 },
    { "turquoise", 64, 224, 208 },
    { "turquoise1", 0, 245, 255 },
    { "turquoise2", 0, 229, 238 },
    { "turquoise3", 0, 197, 205 },
    { "turquoise4", 0, 134, 139 },
    { "violet", 238, 130, 238 },
    { "violet red", 208, 32, 144 },
    { "violetred", 208, 32, 144 },
    { "violetred1", 255, 62, 150 },
    { "violetred2", 238, 58, 140 },
    { "violetred3", 205, 50, 120 },
    { "violetred4", 139, 34, 82 },
    { "wheat", 245, 222, 179 },
    { "wheat1", 255, 231, 186 },
    { "wheat2", 238, 216, 174 },
    { "wheat3", 205, 186, 150 },
    { "wheat4", 139, 126, 102 },
    { "white", 255, 255, 255 },
    { "white smoke", 245, 245, 245 },
    { "whitesmoke", 245, 245, 245 },
    { "yellow", 255, 255, 0 },
    { "yellow green", 154, 205, 50 },
    { "yellow1", 255, 255, 0 },
    { "yellow2", 238, 238, 0 },
    { "yellow3", 205, 205, 0 },
    { "yellow4", 139, 139, 0 },
    { "yellowgreen", 154, 205, 50 },
    { (char *) NULL, 0, 0, 0 }
  };

/*
  Forward declarations.
*/
static NodeInfo
  *InitializeNode(CubeInfo *,const unsigned int);

static void
  Histogram(CubeInfo *,const NodeInfo *,FILE *);

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   C o m p r e s s C o l o r m a p                                           %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method CompressColormap compresses an image colormap removing any
%  duplicate and unused color entries.
%
%  The format of the CompressColormap method is:
%
%      void CompressColormap(Image *image)
%
%  A description of each parameter follows:
%
%    o image: The address of a structure of type Image.
%
%
*/
Export void CompressColormap(Image *image)
{
  QuantizeInfo
    quantize_info;

  if (!IsPseudoClass(image))
    return;
  GetQuantizeInfo(&quantize_info);
  quantize_info.number_colors=image->colors;
  quantize_info.tree_depth=8;
  (void) QuantizeImage(&quantize_info,image);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+  D e s t r o y L i s t                                                      %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method DestroyList traverses the color cube tree and free the list of
%  unique colors.
%
%  The format of the DestroyList method is:
%
%      void DestroyList(const NodeInfo *node_info)
%
%  A description of each parameter follows.
%
%    o node_info: The address of a structure of type NodeInfo which points to a
%      node in the color cube tree that is to be pruned.
%
%
*/
static void DestroyList(const NodeInfo *node_info)
{
  register unsigned int
    id;

  /*
    Traverse any children.
  */
  for (id=0; id < 8; id++)
    if (node_info->child[id] != (NodeInfo *) NULL)
      DestroyList(node_info->child[id]);
  if (node_info->list != (ColorPacket *) NULL)
    FreeMemory(node_info->list);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%  G e t N u m b e r C o l o r s                                              %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method GetNumberColors returns the number of unique colors in an image.
%
%  The format of the GetNumberColors method is:
%
%      number_colors=GetNumberColors(image,file)
%
%  A description of each parameter follows.
%
%    o number_colors: Method GetNumberColors returns the number of unique
%      colors in the specified image.
%
%    o image: The address of a byte (8 bits) array of run-length
%      encoded pixel data of your source image.  The sum of the
%      run-length counts in the source image must be equal to or exceed
%      the number of pixels.
%
%    o file:  An pointer to a FILE.  If it is non-null a list of unique pixel
%      field values and the number of times each occurs in the image is
%      written to the file.
%
%
%
*/
Export unsigned long GetNumberColors(Image *image,FILE *file)
{
#define NumberColorsImageText  "  Computing image colors...  "

  CubeInfo
    color_cube;

  int
    y;

  NodeInfo
    *node_info;

  Nodes
    *nodes;

  register int
    i,
    x;

  register PixelPacket
    *p;

  register unsigned int
    id,
    index,
    level;

  /*
    Initialize color description tree.
  */
  assert(image != (Image *) NULL);
  color_cube.node_list=(Nodes *) NULL;
  color_cube.progress=0;
  color_cube.colors=0;
  color_cube.free_nodes=0;
  color_cube.root=InitializeNode(&color_cube,0);
  if (color_cube.root == (NodeInfo *) NULL)
    {
      MagickWarning(ResourceLimitWarning,
        "Unable to determine the number of image colors",
        "Memory allocation failed");
      return(0);
    }
  for (y=0; y < (int) image->rows; y++)
  {
    p=GetPixelCache(image,0,y,image->columns,1);
    if (p == (PixelPacket *) NULL)
      return(False);
    for (x=0; x < (int) image->columns; x++)
    {
      /*
        Start at the root and proceed level by level.
      */
      node_info=color_cube.root;
      index=MaxTreeDepth-1;
      for (level=1; level <= MaxTreeDepth; level++)
      {
        id=(((Quantum) DownScale(p->red) >> index) & 0x01) << 2 |
           (((Quantum) DownScale(p->green) >> index) & 0x01) << 1 |
           (((Quantum) DownScale(p->blue) >> index) & 0x01);
        if (node_info->child[id] == (NodeInfo *) NULL)
          {
            node_info->child[id]=InitializeNode(&color_cube,level);
            if (node_info->child[id] == (NodeInfo *) NULL)
              {
                MagickWarning(ResourceLimitWarning,
                  "Unable to determine the number of image colors",
                  "Memory allocation failed");
                return(0);
              }
          }
        node_info=node_info->child[id];
        index--;
        if (level != MaxTreeDepth)
          continue;
        for (i=0; i < (int) node_info->number_unique; i++)
           if (ColorMatch(*p,node_info->list[i],0))
             break;
        if (i < (int) node_info->number_unique)
          {
            node_info->list[i].count++;
            continue;
          }
        if (node_info->number_unique == 0)
          node_info->list=(ColorPacket *) AllocateMemory(sizeof(ColorPacket));
        else
          node_info->list=(ColorPacket *)
            ReallocateMemory(node_info->list,(i+1)*sizeof(ColorPacket));
        if (node_info->list == (ColorPacket *) NULL)
          {
            MagickWarning(ResourceLimitWarning,
              "Unable to determine the number of image colors",
              "Memory allocation failed");
            return(0);
          }
        node_info->list[i].red=p->red;
        node_info->list[i].green=p->green;
        node_info->list[i].blue=p->blue;
        node_info->list[i].count=1;
        node_info->number_unique++;
        color_cube.colors++;
      }
      p++;
    }
    if (QuantumTick(y,image->rows))
      ProgressMonitor(NumberColorsImageText,y,image->rows);
  }
  if (file != (FILE *) NULL)
    {
      Histogram(&color_cube,color_cube.root,file);
      (void) fflush(file);
    }
  /*
    Release color cube tree storage.
  */
  DestroyList(color_cube.root);
  do
  {
    nodes=color_cube.node_list->next;
    FreeMemory(color_cube.node_list);
    color_cube.node_list=nodes;
  }
  while (color_cube.node_list != (Nodes *) NULL);
  return(color_cube.colors);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+  H i s t o g r a m                                                          %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method Histogram traverses the color cube tree and produces a list of
%  unique pixel field values and the number of times each occurs in the image.
%
%  The format of the Histogram method is:
%
%      void Histogram(CubeInfo *color_cube,const NodeInfo *node_info,
%        FILE *file)
%
%  A description of each parameter follows.
%
%    o color_cube: A pointer to the CubeInfo structure.
%
%    o node_info: The address of a structure of type NodeInfo which points to a
%      node in the color cube tree that is to be pruned.
%
%
*/
static void Histogram(CubeInfo *color_cube,const NodeInfo *node_info,FILE *file)
{
#define HistogramImageText  "  Computing image histogram...  "

  register unsigned int
    id;

  /*
    Traverse any children.
  */
  for (id=0; id < 8; id++)
    if (node_info->child[id] != (NodeInfo *) NULL)
      Histogram(color_cube,node_info->child[id],file);
  if (node_info->level == MaxTreeDepth)
    {
      char
        name[MaxTextExtent];

      PixelPacket
        color;

      register ColorPacket
        *p;

      register int
        i;

      p=node_info->list;
      for (i=0; i < (int) node_info->number_unique; i++)
      {
        (void) fprintf(file,"%10lu: (%3d,%3d,%3d)  #%02x%02x%02x",
          p->count,p->red,p->green,p->blue,(unsigned int) p->red,
          (unsigned int) p->green,(unsigned int) p->blue);
        (void) fprintf(file,"  ");
        color.red=p->red;
        color.green=p->green;
        color.blue=p->blue;
        (void) QueryColorName(&color,name);
        (void) fprintf(file,"%.1024s",name);
        (void) fprintf(file,"\n");
      }
      if (QuantumTick(color_cube->progress,color_cube->colors))
        ProgressMonitor(HistogramImageText,color_cube->progress,
          color_cube->colors);
      color_cube->progress++;
    }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+  I n i t i a l i z e N o d e                                                %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method InitializeNode allocates memory for a new node in the color cube
%  tree and presets all fields to zero.
%
%  The format of the InitializeNode method is:
%
+      node_info=InitializeNode(color_cube,level)
%
%  A description of each parameter follows.
%
%    o color_cube: A pointer to the CubeInfo structure.
%
%    o level: Specifies the level in the classification the node resides.
%
%
*/
static NodeInfo *InitializeNode(CubeInfo *color_cube,const unsigned int level)
{
  register int
    i;

  NodeInfo
    *node_info;

  if (color_cube->free_nodes == 0)
    {
      Nodes
        *nodes;

      /*
        Allocate a new nodes of nodes.
      */
      nodes=(Nodes *) AllocateMemory(sizeof(Nodes));
      if (nodes == (Nodes *) NULL)
        return((NodeInfo *) NULL);
      nodes->next=color_cube->node_list;
      color_cube->node_list=nodes;
      color_cube->node_info=nodes->nodes;
      color_cube->free_nodes=NodesInAList;
    }
  color_cube->free_nodes--;
  node_info=color_cube->node_info++;
  for (i=0; i < 8; i++)
    node_info->child[i]=(NodeInfo *) NULL;
  node_info->level=level;
  node_info->number_unique=0;
  node_info->list=(ColorPacket *) NULL;
  return(node_info);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%     I s G r a y I m a g e                                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method IsGrayImage returns True if the image is grayscale otherwise
%  False is returned.  If the image is DirectClass and grayscale, it is demoted
%  to PseudoClass.
%
%  The format of the IsGrayImage method is:
%
%      unsigned int IsGrayImage(Image *image)
%
%  A description of each parameter follows:
%
%    o status: Method IsGrayImage returns True if the image is grayscale
%      otherwise False is returned.
%
%    o image: The address of a structure of type Image;  returned from
%      ReadImage.
%
%
*/
Export unsigned int IsGrayImage(Image *image)
{
  register int
    i;

  /*
    Determine if image is grayscale.
  */
  assert(image != (Image *) NULL);
  if (!IsPseudoClass(image))
    return(False);
  for (i=0; i < (int) image->colors; i++)
    if (!IsGray(image->colormap[i]))
      return(False);
  return(True);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%     I s M a t t e I m a g e                                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method IsMatteImage returns True if the image has one or more pixels that
%  are transparent otherwise False is returned.
%  to PseudoClass.
%
%  The format of the IsMatteImage method is:
%
%      unsigned int IsMatteImage(Image *image)
%
%  A description of each parameter follows:
%
%    o status: Method IsMatteImage returns True if the image has one or more
%      pixels that are transparent otherwise False is returned.
%
%    o image: The address of a structure of type Image;  returned from
%      ReadImage.
%
%
*/
Export unsigned int IsMatteImage(Image *image)
{
  int
    y;

  register int
    x;

  register PixelPacket
    *p;

  /*
    Determine if image is grayscale.
  */
  assert(image != (Image *) NULL);
  if (!image->matte)
    return(False);
  for (y=0; y < (int) image->rows; y++)
  {
    p=GetPixelCache(image,0,y,image->columns,1);
    if (p == (PixelPacket *) NULL)
      return(False);
    for (x=0; x < (int) image->columns; x++)
    {
      if (p->opacity != Opaque)
        return(True);
      p++;
    }
  }
  image->matte=False;
  return(False);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%   I s M o n o c h r o m e I m a g e                                         %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method IsMonochromeImage returns True if the image is monochrome otherwise
%  False is returned.  If the image is DirectClass and monochrome, it is
%  demoted to PseudoClass.
%
%  The format of the IsMonochromeImage method is:
%
%      status=IsMonochromeImage(image)
%
%  A description of each parameter follows:
%
%    o status: Method IsMonochromeImage returns True if the image is
%      monochrome otherwise False is returned.
%
%    o image: The address of a structure of type Image;  returned from
%      ReadImage.
%
%
*/
Export unsigned int IsMonochromeImage(Image *image)
{
  /*
    Determine if image is monochrome.
  */
  assert(image != (Image *) NULL);
  if (!IsGrayImage(image))
    return(False);
  if (image->colors > 2)
    return(False);
  if ((Intensity(image->colormap[0]) != 0) &&
      (Intensity(image->colormap[0]) != MaxRGB))
    return(False);
  if (image->colors == 2)
    if ((Intensity(image->colormap[1]) != 0) &&
        (Intensity(image->colormap[1]) != MaxRGB))
      return(False);
  return(True);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%  I s P s e u d o C l a s s                                                  %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method IsPseudoClass returns True if the image is PseudoClass and has 256
%  unique colors or less.  If the image is DirectClass and has 256 colors
%  or less, the image is demoted to PseudoClass.
%
%  The format of the IsPseudoClass method is:
%
%      unsigned int IsPseudoClass(Image *image)
%
%  A description of each parameter follows.
%
%    o status:  Method IsPseudoClass returns True is the image is
%      PseudoClass or has 256 color or less.
%
%    o image: The address of a byte (8 bits) array of run-length
%      encoded pixel data of your source image.  The sum of the
%      run-length counts in the source image must be equal to or exceed
%      the number of pixels.
%
%
*/
Export unsigned int IsPseudoClass(Image *image)
{
  CubeInfo
    color_cube;

  int
    y;

  Nodes
    *nodes;

  register int
    i,
    x;

  register NodeInfo
    *node_info;

  register PixelPacket
    *p,
    *q;

  register unsigned int
    index,
    level;

  unsigned int
    id;

  assert(image != (Image *) NULL);
  if ((image->class == PseudoClass) && (image->colors <= 256))
    return(True);
  if (image->matte)
    return(False);
  if (image->colorspace == CMYKColorspace)
    return(False);
  /*
    Initialize color description tree.
  */
  color_cube.node_list=(Nodes *) NULL;
  color_cube.colors=0;
  color_cube.free_nodes=0;
  color_cube.root=InitializeNode(&color_cube,0);
  if (color_cube.root == (NodeInfo *) NULL)
    {
      MagickWarning(ResourceLimitWarning,"Unable to determine image class",
        "Memory allocation failed");
      return(False);
    }
  for (y=0; (y < (int) image->rows) && (color_cube.colors <= 256); y++)
  {
    p=GetPixelCache(image,0,y,image->columns,1);
    if (p == (PixelPacket *) NULL)
      return(False);
    for (x=0; (x < (int) image->columns) && (color_cube.colors <= 256); x++)
    {
      /*
        Start at the root and proceed level by level.
      */
      node_info=color_cube.root;
      index=MaxTreeDepth-1;
      for (level=1; level < MaxTreeDepth; level++)
      {
        id=((DownScale(p->red) >> index) & 0x01) << 2 |
           ((DownScale(p->green) >> index) & 0x01) << 1 |
           ((DownScale(p->blue) >> index) & 0x01);
        if (node_info->child[id] == (NodeInfo *) NULL)
          {
            node_info->child[id]=InitializeNode(&color_cube,level);
            if (node_info->child[id] == (NodeInfo *) NULL)
              {
                MagickWarning(ResourceLimitWarning,
                  "Unable to determine image class","Memory allocation failed");
                return(False);
              }
          }
        node_info=node_info->child[id];
        index--;
      }
      for (i=0; i < (int) node_info->number_unique; i++)
        if (ColorMatch(*p,node_info->list[i],0))
          break;
      if (i == (int) node_info->number_unique)
        {
          /*
            Add this unique color to the color list.
          */
          if (node_info->number_unique == 0)
            node_info->list=(ColorPacket *) AllocateMemory(sizeof(ColorPacket));
          else
            node_info->list=(ColorPacket *)
              ReallocateMemory(node_info->list,(i+1)*sizeof(ColorPacket));
          if (node_info->list == (ColorPacket *) NULL)
            {
              MagickWarning(ResourceLimitWarning,
                "Unable to determine image class","Memory allocation failed");
              return(False);
            }
          node_info->list[i].red=p->red;
          node_info->list[i].green=p->green;
          node_info->list[i].blue=p->blue;
          node_info->list[i].index=color_cube.colors++;
          node_info->number_unique++;
        }
      p++;
    }
  }
  if (color_cube.colors <= 256)
    {
      IndexPacket
        index;

      /*
        Create colormap.
      */
      image->class=PseudoClass;
      image->colors=color_cube.colors;
      if (image->colormap == (PixelPacket *) NULL)
        image->colormap=(PixelPacket *)
          AllocateMemory(image->colors*sizeof(PixelPacket));
      else
        image->colormap=(PixelPacket *) ReallocateMemory((char *)
          image->colormap,image->colors*sizeof(PixelPacket));
      if (image->colormap == (PixelPacket *) NULL)
        {
          MagickWarning(ResourceLimitWarning,"Unable to determine image class",
            "Memory allocation failed");
          return(False);
        }
      for (y=0; y < (int) image->rows; y++)
      {
        q=GetPixelCache(image,0,y,image->columns,1);
        if (q == (PixelPacket *) NULL)
          break;
        for (x=0; x < (int) image->columns; x++)
        {
          /*
            Start at the root and proceed level by level.
          */
          node_info=color_cube.root;
          index=MaxTreeDepth-1;
          for (level=1; level < MaxTreeDepth; level++)
          {
            id=((DownScale(q->red) >> index) & 0x01) << 2 |
               ((DownScale(q->green) >> index) & 0x01) << 1 |
               ((DownScale(q->blue) >> index) & 0x01);
            node_info=node_info->child[id];
            index--;
          }
          for (i=0; i < (int) node_info->number_unique; i++)
            if (ColorMatch(*q,node_info->list[i],0))
              break;
          index=node_info->list[i].index;
          image->indexes[x]=index;
          image->colormap[index].red=node_info->list[i].red;
          image->colormap[index].green=node_info->list[i].green;
          image->colormap[index].blue=node_info->list[i].blue;
          q++;
        }
        if (!SyncPixelCache(image))
          break;
      }
    }
  /*
    Release color cube tree storage.
  */
  DestroyList(color_cube.root);
  do
  {
    nodes=color_cube.node_list->next;
    FreeMemory(color_cube.node_list);
    color_cube.node_list=nodes;
  } while (color_cube.node_list != (Nodes *) NULL);
  return((image->class == PseudoClass) && (image->colors <= 256));
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   Q u e r y C o l o r D a t a b a s e                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method QueryColorDatabase looks up a RGB values for a color given in the
%  target string.
%
%  The format of the QueryColorDatabase method is:
%
%      unsigned int QueryColorDatabase(const char *target,PixelPacket *color)
%
%  A description of each parameter follows:
%
%    o status:  Method QueryColorDatabase returns True if the RGB values
%      of the target color is defined, otherwise False is returned.
%
%    o target: Specifies the color to lookup in the X color database.
%
%    o color: A pointer to an PixelPacket structure.  The RGB value of the
%      target color is returned as this value.
%
%
*/
Export unsigned int QueryColorDatabase(const char *target,PixelPacket *color)
{
  int
    blue,
    green,
    left,
    mid,
    opacity,
    red,
    right;

  register int
    i;

  /*
    Initialize color return value.
  */
  assert(color != (PixelPacket *) NULL);
  GetPixelPacket(color);
  if ((target == (char *) NULL) || (*target == '\0'))
    target=BackgroundColor;
  while (isspace((int) (*target)))
    target++;
  if (*target == '#')
    {
      char
        c;

      register int
        i;

      unsigned long
        n;

      green=0;
      blue=0;
      opacity=(-1);
      target++;
      n=Extent(target);
      if ((n == 3) || (n == 6) || (n == 9) || (n == 12))
        {
          /*
            Parse RGB specification.
          */
          n/=3;
          do
          {
            red=green;
            green=blue;
            blue=0;
            for (i=(int) n-1; i >= 0; i--)
            {
              c=(*target++);
              blue<<=4;
              if ((c >= '0') && (c <= '9'))
                blue|=c-'0';
              else
                if ((c >= 'A') && (c <= 'F'))
                  blue|=c-('A'-10);
                else
                  if ((c >= 'a') && (c <= 'f'))
                    blue|=c-('a'-10);
                  else
                    return(False);
            }
          } while (*target != '\0');
        }
      else
        if ((n != 4) && (n != 8) && (n != 16))
          return(False);
        else
          {
            /*
              Parse RGBA specification.
            */
            n/=4;
            do
            {
              red=green;
              green=blue;
              blue=opacity;
              opacity=0;
              for (i=(int) n-1; i >= 0; i--)
              {
                c=(*target++);
                opacity<<=4;
                if ((c >= '0') && (c <= '9'))
                  opacity|=c-'0';
                else
                  if ((c >= 'A') && (c <= 'F'))
                    opacity|=c-('A'-10);
                  else
                    if ((c >= 'a') && (c <= 'f'))
                      opacity|=c-('a'-10);
                    else
                      return(False);
              }
            } while (*target != '\0');
          }
      n<<=2;
      color->red=((unsigned long) (MaxRGB*red)/((1 << n)-1));
      color->green=((unsigned long) (MaxRGB*green)/((1 << n)-1));
      color->blue=((unsigned long) (MaxRGB*blue)/((1 << n)-1));
      color->opacity=Opaque;
      if (opacity >= 0)
        color->opacity=((unsigned long) (MaxRGB*opacity)/((1 << n)-1));
      return(True);
    }
  /*
    Search our internal color database.
  */
  left=0;
  right=NumberXColors-2;
  for (mid=(right+left)/2 ; right != left; mid=(right+left)/2)
  {
    i=Latin1Compare(target,XColorlist[mid].name);
    if (i < 0)
      {
        if (right == mid)
          mid--;
        right=mid;
        continue;
      }
    if (i > 0)
      {
        if (left == mid)
          mid++;
        left=mid;
        continue;
      }
    color->red=XColorlist[mid].red;
    color->green=XColorlist[mid].green;
    color->blue=XColorlist[mid].blue;
    color->opacity=Opaque;
    return(True);
  }
#if defined(HasX11)
  {
    XColor
      xcolor;

    unsigned int
      status;

    /*
      Let the X server define the color for us.
    */
    status=XQueryColorDatabase(target,&xcolor);
    color->red=XDownScale(xcolor.red);
    color->green=XDownScale(xcolor.green);
    color->blue=XDownScale(xcolor.blue);
    color->opacity=Opaque;
    return(status);
  }
#else
  {
    char
      colorname[MaxTextExtent],
      text[MaxTextExtent];

    int
      count;

    static FILE
      *database = (FILE *) NULL;

    /*
      Match color against the X color database.
    */
    if (database == (FILE *) NULL)
      database=fopen(RGBColorDatabase,"r");
    if (database != (FILE *) NULL)
      {
        (void) rewind(database);
        while (fgets(text,MaxTextExtent,database) != (char *) NULL)
        {
          count=sscanf(text,"%d %d %d %[^\n]\n",&red,&green,&blue,colorname);
          if (count != 4)
            continue;
          if (Latin1Compare(colorname,target) == 0)
            {
              color->red=UpScale(red);
              color->green=UpScale(green);
              color->blue=UpScale(blue);
              color->opacity=Opaque;
              return(True);
            }
        }
      }
    return(False);
  }
#endif
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%  Q u e r y C o l o r N a m e                                                %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method QueryColorName returns the name of the color that is closest to the
%  supplied color in RGB space.
%
%  The format of the QueryColorName method is:
%
%      unsigned int QueryColorName(const PixelPacket *color,char *name)
%
%  A description of each parameter follows.
%
%    o distance: Method QueryColorName returns the distance-squared in RGB
%      space as well as the color name that is at a minimum distance.
%
%    o color: This is a pointer to a PixelPacket structure that contains the
%      color we are searching for.
%
%    o name: The name of the color that is closest to the supplied color is
%      returned in this character buffer.
%
%
*/
Export unsigned int QueryColorName(const PixelPacket *color,char *name)
{
  double
    min_distance;

  register const ColorlistInfo
    *p;

  register double
    distance_squared;

  register int
    distance;

  *name='\0';
  min_distance=0;
  for (p=XColorlist; p->name != (char *) NULL; p++)
  {
    distance=DownScale(color->red)-(int) p->red;
    distance_squared=distance*distance;
    distance=DownScale(color->green)-(int) p->green;
    distance_squared+=distance*distance;
    distance=DownScale(color->blue)-(int) p->blue;
    distance_squared+=distance*distance;
    if ((p == XColorlist) || (distance_squared < min_distance))
      {
        min_distance=distance_squared;
        (void) strcpy(name,p->name);
      }
  }
  if (min_distance != 0.0)
    FormatString(name,HexColorFormat,(unsigned int) color->red,
      (unsigned int) color->green,(unsigned int) color->blue);
  return((unsigned int) min_distance);
}
