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/** R : A Computer Language for Statistical Data Analysis* Copyright (C) 1997-2009 The R Development Core Team* Copyright (C) 2003 The R Foundation** This program 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 of the License, or* (at your option) any later version.** This program 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 this program; if not, a copy is available at* http://www.r-project.org/Licenses/*//* This should be regarded as part of the graphics engine */#ifdef HAVE_CONFIG_H#include <config.h>#endif#include <Defn.h>#include <Graphics.h> /* for dpptr */#include <Colors.h>#include <R_ext/GraphicsEngine.h>#include <Rmath.h>#include <ctype.h> /* for tolower, isdigit */static unsigned int rgb2col(const char *);static char *RGB2rgb(unsigned int, unsigned int, unsigned int);static char *RGBA2rgb(unsigned int, unsigned int, unsigned int, unsigned int);static double str2col(const char *s, double bg);static int R_ColorTableSize;static unsigned int R_ColorTable[COLOR_TABLE_SIZE];/* String Comparison Ignoring Case and Squeezing Out Blanks */static int StrMatch(const char *s, const char *t){for(;;) {if(*s == '\0' && *t == '\0') {return 1;}if(*s == ' ') {s++; continue;}if(*t == ' ') {t++; continue;}if(tolower(*s++) != tolower(*t++))return 0;}}static unsigned int char2col(const char *s){if (s[0] == '#') return rgb2col(s);else return name2col(s);}static unsigned int ScaleColor(double x){if (!R_FINITE(x) || x < 0.0 || x > 1.0)error(_("color intensity %g, not in [0,1]"), x);return (unsigned int)(255*x + 0.5);}static unsigned int CheckColor(int x){if (x == NA_INTEGER || x < 0 || x > 255)error(_("color intensity %d, not in 0:255"), x);return (unsigned int)x;}static unsigned int ScaleAlpha(double x){if (!R_FINITE(x) || x < 0.0 || x > 1.0)error(_("alpha level %g, not in [0,1]"), x);return (unsigned int)(255*x + 0.5);}static unsigned int CheckAlpha(int x){if (x == NA_INTEGER || x < 0 || x > 255)error(_("alpha level %d, not in 0:255"), x);return (unsigned int)x;}SEXP attribute_hidden do_hsv(SEXP call, SEXP op, SEXP args, SEXP env){SEXP c, h, s, v, gm, a;double hh, ss, vv, gg, aa, r=0., g=0., b=0.; /* -Wall */int i, max, nh, ns, nv, ng, na;checkArity(op, args);PROTECT(h = coerceVector(CAR(args),REALSXP)); args = CDR(args);PROTECT(s = coerceVector(CAR(args),REALSXP)); args = CDR(args);PROTECT(v = coerceVector(CAR(args),REALSXP)); args = CDR(args);PROTECT(gm = coerceVector(CAR(args),REALSXP)); args = CDR(args);PROTECT(a = coerceVector(CAR(args),REALSXP)); args = CDR(args);nh = LENGTH(h);ns = LENGTH(s);nv = LENGTH(v);ng = LENGTH(gm);na = LENGTH(a);if (nh <= 0 || ns <= 0 || nv <= 0 || ng <= 0 || na <= 0) {UNPROTECT(5);return(allocVector(STRSXP, 0));}max = nh;if (max < ns) max = ns;if (max < nv) max = nv;if (max < ng) max = ng;if (max < na) max = na;PROTECT(c = allocVector(STRSXP, max));if(max == 0) return(c);for (i = 0; i < max; i++) {hh = REAL(h)[i % nh];ss = REAL(s)[i % ns];vv = REAL(v)[i % nv];gg = REAL(gm)[i % ng];aa = REAL(a)[i % na];if (hh < 0 || hh > 1 || ss < 0 || ss > 1 || vv < 0 || vv > 1 ||aa < 0 || aa > 1)error(_("invalid hsv color"));hsv2rgb(hh, ss, vv, &r, &g, &b);r = pow(r, gg);g = pow(g, gg);b = pow(b, gg);SET_STRING_ELT(c, i, mkChar(RGBA2rgb(ScaleColor(r),ScaleColor(g),ScaleColor(b),ScaleAlpha(aa))));}UNPROTECT(6);return c;}/* D65 White Point */#define WHITE_X 95.047#define WHITE_Y 100.000#define WHITE_Z 108.883#define WHITE_u 0.1978398#define WHITE_v 0.4683363/* Standard CRT Gamma */#define GAMMA 2.4static double gtrans(double u){if (u > 0.00304)return 1.055 * pow(u, (1 / GAMMA)) - 0.055;elsereturn 12.92 * u;}static int FixupColor(int *r, int *g, int *b){int fix = 0;if (*r < 0) { *r = 0; fix = 1; } else if (*r > 255) { *r = 255; fix = 1; }if (*g < 0) { *g = 0; fix = 1; } else if (*g > 255) { *g = 255; fix = 1; }if (*b < 0) { *b = 0; fix = 1; } else if (*b > 255) { *b = 255; fix = 1; }return fix;}static voidhcl2rgb(double h, double c, double l, double *R, double *G, double *B){double L, U, V;double u, v;double X, Y, Z;/* Step 1 : Convert to CIE-LUV */h = DEG2RAD * h;L = l;U = c * cos(h);V = c * sin(h);/* Step 2 : Convert to CIE-XYZ */if (L <= 0 && U == 0 && V == 0) {X = 0; Y = 0; Z = 0;}else {Y = WHITE_Y * ((L > 7.999592) ? pow((L + 16)/116, 3) : L / 903.3);u = U / (13 * L) + WHITE_u;v = V / (13 * L) + WHITE_v;X = 9.0 * Y * u / (4 * v);Z = - X / 3 - 5 * Y + 3 * Y / v;}/* Step 4 : CIE-XYZ to sRGB */*R = gtrans(( 3.240479 * X - 1.537150 * Y - 0.498535 * Z) / WHITE_Y);*G = gtrans((-0.969256 * X + 1.875992 * Y + 0.041556 * Z) / WHITE_Y);*B = gtrans(( 0.055648 * X - 0.204043 * Y + 1.057311 * Z) / WHITE_Y);}SEXP attribute_hidden do_hcl(SEXP call, SEXP op, SEXP args, SEXP env){SEXP h, c, l, a, ans;double H, C, L, A, r, g, b;int nh, nc, nl, na, max, i;int ir, ig, ib;int fixup;checkArity(op, args);PROTECT(h = coerceVector(CAR(args),REALSXP)); args = CDR(args);PROTECT(c = coerceVector(CAR(args),REALSXP)); args = CDR(args);PROTECT(l = coerceVector(CAR(args),REALSXP)); args = CDR(args);PROTECT(a = coerceVector(CAR(args),REALSXP)); args = CDR(args);fixup = asLogical(CAR(args));nh = LENGTH(h);nc = LENGTH(c);nl = LENGTH(l);na = LENGTH(a);if (nh <= 0 || nc <= 0 || nl <= 0 || na <= 0) {UNPROTECT(4);return(allocVector(STRSXP, 0));}max = nh;if (max < nc) max = nc;if (max < nl) max = nl;if (max < na) max = na;PROTECT(ans = allocVector(STRSXP, max));for (i = 0; i < max; i++) {H = REAL(h)[i % nh];C = REAL(c)[i % nc];L = REAL(l)[i % nl];A = REAL(a)[i % na];if (!R_FINITE(A)) A = 1;if (L < 0 || L > WHITE_Y || C < 0 || A < 0 || A > 1)error(_("invalid hcl color"));hcl2rgb(H, C, L, &r, &g, &b);ir = 255 * r + .5;ig = 255 * g + .5;ib = 255 * b + .5;if (FixupColor(&ir, &ig, &ib) && !fixup)SET_STRING_ELT(ans, i, NA_STRING);elseSET_STRING_ELT(ans, i, mkChar(RGBA2rgb(ir, ig, ib,ScaleAlpha(A))));}UNPROTECT(5);return ans;}SEXP attribute_hidden do_rgb(SEXP call, SEXP op, SEXP args, SEXP env){SEXP c, r, g, b, a, nam;int OP, i, l_max, nr, ng, nb, na;Rboolean max_1 = FALSE;double mV = 0.0; /* -Wall */checkArity(op, args);OP = PRIMVAL(op);if(OP) {/* op == 1: rgb256() :*/PROTECT(r = coerceVector(CAR(args), INTSXP)); args = CDR(args);PROTECT(g = coerceVector(CAR(args), INTSXP)); args = CDR(args);PROTECT(b = coerceVector(CAR(args), INTSXP)); args = CDR(args);PROTECT(a = coerceVector(CAR(args), INTSXP)); args = CDR(args);}else {PROTECT(r = coerceVector(CAR(args), REALSXP)); args = CDR(args);PROTECT(g = coerceVector(CAR(args), REALSXP)); args = CDR(args);PROTECT(b = coerceVector(CAR(args), REALSXP)); args = CDR(args);PROTECT(a = coerceVector(CAR(args), REALSXP)); args = CDR(args);mV = asReal(CAR(args)); args = CDR(args);max_1 = (mV == 1.);}nr = LENGTH(r); ng = LENGTH(g); nb = LENGTH(b); na = LENGTH(a);if (nr <= 0 || ng <= 0 || nb <= 0 || na <= 0) {UNPROTECT(4);return(allocVector(STRSXP, 0));}l_max = nr;if (l_max < ng) l_max = ng;if (l_max < nb) l_max = nb;if (l_max < na) l_max = na;PROTECT(nam = coerceVector(CAR(args), STRSXP)); args = CDR(args);if (length(nam) != 0 && length(nam) != l_max)error(_("invalid 'names' vector"));PROTECT(c = allocVector(STRSXP, l_max));#define _R_set_c_RGBA(_R,_G,_B,_A) \for (i = 0; i < l_max; i++) \SET_STRING_ELT(c, i, mkChar(RGBA2rgb(_R,_G,_B,_A)))if(OP) { /* OP == 1: rgb256() :*/_R_set_c_RGBA(CheckColor(INTEGER(r)[i%nr]),CheckColor(INTEGER(g)[i%ng]),CheckColor(INTEGER(b)[i%nb]),CheckAlpha(INTEGER(a)[i%na]));}else if(max_1) {_R_set_c_RGBA(ScaleColor(REAL(r)[i%nr]),ScaleColor(REAL(g)[i%ng]),ScaleColor(REAL(b)[i%nb]),ScaleAlpha(REAL(a)[i%na]));}else { /* maxColorVal not in {1, 255} */_R_set_c_RGBA(ScaleColor(REAL(r)[i%nr] / mV),ScaleColor(REAL(g)[i%ng] / mV),ScaleColor(REAL(b)[i%nb] / mV),ScaleAlpha(REAL(a)[i%na] / mV));}if (length(nam) != 0)setAttrib(c, R_NamesSymbol, nam);UNPROTECT(6);return c;}SEXP attribute_hidden do_gray(SEXP call, SEXP op, SEXP args, SEXP env){SEXP lev, ans;double level;int i, ilevel, nlev;checkArity(op, args);PROTECT(lev = coerceVector(CAR(args),REALSXP));nlev = LENGTH(lev);PROTECT(ans = allocVector(STRSXP, nlev));for (i = 0; i < nlev; i++) {level = REAL(lev)[i];if (ISNAN(level) || level < 0 || level > 1)error(_("invalid gray level, must be in [0,1]."));ilevel = 255 * level + 0.5;SET_STRING_ELT(ans, i, mkChar(RGB2rgb(ilevel, ilevel, ilevel)));}UNPROTECT(2);return ans;}SEXP attribute_hidden do_col2RGB(SEXP call, SEXP op, SEXP args, SEXP env){/* colorname, "#rrggbb" or "col.number" to (r,g,b) conversion */SEXP colors, ans, names, dmns;double col, bg;unsigned int icol;int n, i, i4;checkArity(op, args);colors = CAR(args);if(isString(colors)) PROTECT(colors);else {PROTECT(colors = coerceVector(colors, INTSXP));if (TYPEOF(colors) != INTSXP)error(_("invalid '%s' value"), "col");}n = LENGTH(colors);/* First set up the output matrix */PROTECT(ans = allocMatrix(INTSXP, 4, n));PROTECT(dmns = allocVector(VECSXP, 2));PROTECT(names = allocVector(STRSXP, 4));SET_STRING_ELT(names, 0, mkChar("red"));SET_STRING_ELT(names, 1, mkChar("green"));SET_STRING_ELT(names, 2, mkChar("blue"));SET_STRING_ELT(names, 3, mkChar("alpha"));SET_VECTOR_ELT(dmns, 0, names);UNPROTECT(1); /*names*/if ((names = getAttrib(colors, R_NamesSymbol)) != R_NilValue)SET_VECTOR_ELT(dmns, 1, names);setAttrib(ans, R_DimNamesSymbol, dmns);/* avoid looking up the background unless we will need it;this may avoid opening a new window. Unfortunately, there is nounavailable colour, so we work with doubles and convert at thelast minute */#define BG_NEEDED -1.0bg = BG_NEEDED;if(isString(colors)) {for(i = i4 = 0; i < n; i++, i4 += 4) {col = str2col(CHAR(STRING_ELT(colors, i)), bg);if (col == BG_NEEDED)col = bg = dpptr(GEcurrentDevice())->bg;icol = (unsigned int)col;INTEGER(ans)[i4 +0] = R_RED(icol);INTEGER(ans)[i4 +1] = R_GREEN(icol);INTEGER(ans)[i4 +2] = R_BLUE(icol);INTEGER(ans)[i4 +3] = R_ALPHA(icol);}} else {for(i = i4 = 0; i < n; i++, i4 += 4) {col = INTEGER(colors)[i];if (col == NA_INTEGER) col = R_TRANWHITE;else if (col == 0) col = bg;else col = R_ColorTable[(unsigned int)(col-1) % R_ColorTableSize];if (col == BG_NEEDED)col = bg = dpptr(GEcurrentDevice())->bg;icol = (unsigned int)col;INTEGER(ans)[i4 +0] = R_RED(icol);INTEGER(ans)[i4 +1] = R_GREEN(icol);INTEGER(ans)[i4 +2] = R_BLUE(icol);INTEGER(ans)[i4 +3] = R_ALPHA(icol);}}UNPROTECT(3);return ans;}SEXP attribute_hidden do_RGB2hsv(SEXP call, SEXP op, SEXP args, SEXP env){/* (r,g,b) -> (h,s,v) conversion */SEXP rgb, dd, ans, names, dmns;int n, i, i3;checkArity(op, args);PROTECT(rgb = coerceVector(CAR(args),REALSXP)); args = CDR(args);if(!isMatrix(rgb))error(_("rgb is not a matrix (internally)"));dd = getAttrib(rgb, R_DimSymbol);if(INTEGER(dd)[0] != 3)error(_("rgb must have 3 rows (internally)"));n = INTEGER(dd)[1];PROTECT(ans = allocMatrix(REALSXP, 3, n));PROTECT(dmns = allocVector(VECSXP, 2));/* row names: */PROTECT(names = allocVector(STRSXP, 3));SET_STRING_ELT(names, 0, mkChar("h"));SET_STRING_ELT(names, 1, mkChar("s"));SET_STRING_ELT(names, 2, mkChar("v"));SET_VECTOR_ELT(dmns, 0, names);/* column names if input has: */if ((dd = getAttrib(rgb, R_DimNamesSymbol)) != R_NilValue &&(names = VECTOR_ELT(dd, 1)) != R_NilValue)SET_VECTOR_ELT(dmns, 1, names);setAttrib(ans, R_DimNamesSymbol, dmns);UNPROTECT(2);/* names, dmns */for(i = i3 = 0; i < n; i++, i3 += 3) {rgb2hsv(REAL(rgb)[i3+ 0], REAL(rgb)[i3+ 1], REAL(rgb)[i3+ 2],&REAL(ans)[i3+ 0], &REAL(ans)[i3+ 1], &REAL(ans)[i3 +2]);}UNPROTECT(2);return ans;}/* From here on down moved from graphics.c in 2.7.0 *//* Colour Code *//* hsv2rgb -- HSV to RGB conversion *//* Based on HSV_TO_RGB from Foley and Van Dam First Ed. Page 616 *//* See Alvy Ray Smith, Color Gamut Transform Pairs, SIGGRAPH '78 */static char HexDigits[] = "0123456789ABCDEF";/* rgb2hsv and hsv2rgb are in Utils.h ! */void hsv2rgb(double h, double s, double v, double *r, double *g, double *b){double f, p, q, t;int i;f = modf(h * 6.0, &t);i = ((int) t) % 6;p = v * (1 - s);q = v * (1 - s * f);t = v * (1 - (s * (1 - f)));switch (i) {case 0: *r = v; *g = t; *b = p; break;case 1: *r = q; *g = v; *b = p; break;case 2: *r = p; *g = v; *b = t; break;case 3: *r = p; *g = q; *b = v; break;case 4: *r = t; *g = p; *b = v; break;case 5: *r = v; *g = p; *b = q; break;default:error(_("bad hsv to rgb color conversion"));}}/* rgb2hsv() -- the reverse (same reference as above)* this implementation is adapted from code by Nicholas Lewin-Koh.*/void rgb2hsv(double r, double g, double b,double *h, double *s, double *v)/* all (r,g,b, h,s,v) values in [0,1] */{double min, max, delta;Rboolean r_max = TRUE, b_max = FALSE;/* Compute min(r,g,b) and max(r,g,b) and remember where max is: */min = max = r;if(min > g) { /* g < r */if(b < g)min = b;/* & max = r */else { /* g <= b, g < r */min = g;if(b > r) { max = b; b_max = TRUE; r_max = FALSE; }/* else : g <= b <=r */}} else { /* r <= g */if(b > g) {max = b; b_max = TRUE; r_max = FALSE; /* & min = r */} else { /* b,r <= g */max = g; r_max = FALSE; /* & min = r */if(b < r) min = b; /* else : r <= b <= g */}}*v = max;if( max == 0 || (delta = max - min) == 0) {/* r = g = b : "gray" : s = h = 0 */*s = *h = 0;return;}/* else : */*s = delta / max;if(r_max)*h = ( g - b ) / delta; /* between yellow & magenta */else if(b_max)*h = 4 + ( r - g ) / delta; /* between magenta & cyan */else /* g == max */*h = 2 + ( b - r ) / delta; /* between cyan & yellow*/*h /= 6;if(*h < 0)*h += 1.;return;}/** Color Specification** Colors are stored internally in integers. Each integer is* broken into four bytes. The three least significant bytes* are used to contain levels of red, green and blue. These* levels are integers in the range [0,255].** Externally, colors are specified either:** a) by name, using a large table of color names,** b) by RGB values using a string of the form "#rrggbb"* where rr, gg and bb are hex integers giving the level* of red green and blue,** c) as an index into a user setable palette of colors.**//* Default Color Palette *//* Paul Murrell 05/06/02 (2002, probably)* Changed "white" to "grey" in the default palette* in response to user suggestion*/attribute_hiddenconst char *DefaultPalette[] = {"black","red","green3","blue","cyan","magenta","yellow","grey",NULL};/* The Table of Known Color Names *//* Adapted from the X11 RGB database *//* Note: the color "white" is moved *//* to the top of the database to avoid *//* its being known as "gray100" */typedefstruct colorDataBaseEntry {char *name; /* X11 Color Name */char *rgb; /* #RRGGBB String */unsigned int code; /* Internal R Color Code */} ColorDataBaseEntry;static int ColorDataBaseSize;static ColorDataBaseEntry ColorDataBase[] = {/* name rgb code -- filled in by InitColors() */{"white", "#FFFFFF", 0},{"aliceblue", "#F0F8FF", 0},{"antiquewhite", "#FAEBD7", 0},{"antiquewhite1", "#FFEFDB", 0},{"antiquewhite2", "#EEDFCC", 0},{"antiquewhite3", "#CDC0B0", 0},{"antiquewhite4", "#8B8378", 0},{"aquamarine", "#7FFFD4", 0},{"aquamarine1", "#7FFFD4", 0},{"aquamarine2", "#76EEC6", 0},{"aquamarine3", "#66CDAA", 0},{"aquamarine4", "#458B74", 0},{"azure", "#F0FFFF", 0},{"azure1", "#F0FFFF", 0},{"azure2", "#E0EEEE", 0},{"azure3", "#C1CDCD", 0},{"azure4", "#838B8B", 0},{"beige", "#F5F5DC", 0},{"bisque", "#FFE4C4", 0},{"bisque1", "#FFE4C4", 0},{"bisque2", "#EED5B7", 0},{"bisque3", "#CDB79E", 0},{"bisque4", "#8B7D6B", 0},{"black", "#000000", 0},{"blanchedalmond", "#FFEBCD", 0},{"blue", "#0000FF", 0},{"blue1", "#0000FF", 0},{"blue2", "#0000EE", 0},{"blue3", "#0000CD", 0},{"blue4", "#00008B", 0},{"blueviolet", "#8A2BE2", 0},{"brown", "#A52A2A", 0},{"brown1", "#FF4040", 0},{"brown2", "#EE3B3B", 0},{"brown3", "#CD3333", 0},{"brown4", "#8B2323", 0},{"burlywood", "#DEB887", 0},{"burlywood1", "#FFD39B", 0},{"burlywood2", "#EEC591", 0},{"burlywood3", "#CDAA7D", 0},{"burlywood4", "#8B7355", 0},{"cadetblue", "#5F9EA0", 0},{"cadetblue1", "#98F5FF", 0},{"cadetblue2", "#8EE5EE", 0},{"cadetblue3", "#7AC5CD", 0},{"cadetblue4", "#53868B", 0},{"chartreuse", "#7FFF00", 0},{"chartreuse1", "#7FFF00", 0},{"chartreuse2", "#76EE00", 0},{"chartreuse3", "#66CD00", 0},{"chartreuse4", "#458B00", 0},{"chocolate", "#D2691E", 0},{"chocolate1", "#FF7F24", 0},{"chocolate2", "#EE7621", 0},{"chocolate3", "#CD661D", 0},{"chocolate4", "#8B4513", 0},{"coral", "#FF7F50", 0},{"coral1", "#FF7256", 0},{"coral2", "#EE6A50", 0},{"coral3", "#CD5B45", 0},{"coral4", "#8B3E2F", 0},{"cornflowerblue", "#6495ED", 0},{"cornsilk", "#FFF8DC", 0},{"cornsilk1", "#FFF8DC", 0},{"cornsilk2", "#EEE8CD", 0},{"cornsilk3", "#CDC8B1", 0},{"cornsilk4", "#8B8878", 0},{"cyan", "#00FFFF", 0},{"cyan1", "#00FFFF", 0},{"cyan2", "#00EEEE", 0},{"cyan3", "#00CDCD", 0},{"cyan4", "#008B8B", 0},{"darkblue", "#00008B", 0},{"darkcyan", "#008B8B", 0},{"darkgoldenrod", "#B8860B", 0},{"darkgoldenrod1", "#FFB90F", 0},{"darkgoldenrod2", "#EEAD0E", 0},{"darkgoldenrod3", "#CD950C", 0},{"darkgoldenrod4", "#8B6508", 0},{"darkgray", "#A9A9A9", 0},{"darkgreen", "#006400", 0},{"darkgrey", "#A9A9A9", 0},{"darkkhaki", "#BDB76B", 0},{"darkmagenta", "#8B008B", 0},{"darkolivegreen", "#556B2F", 0},{"darkolivegreen1", "#CAFF70", 0},{"darkolivegreen2", "#BCEE68", 0},{"darkolivegreen3", "#A2CD5A", 0},{"darkolivegreen4", "#6E8B3D", 0},{"darkorange", "#FF8C00", 0},{"darkorange1", "#FF7F00", 0},{"darkorange2", "#EE7600", 0},{"darkorange3", "#CD6600", 0},{"darkorange4", "#8B4500", 0},{"darkorchid", "#9932CC", 0},{"darkorchid1", "#BF3EFF", 0},{"darkorchid2", "#B23AEE", 0},{"darkorchid3", "#9A32CD", 0},{"darkorchid4", "#68228B", 0},{"darkred", "#8B0000", 0},{"darksalmon", "#E9967A", 0},{"darkseagreen", "#8FBC8F", 0},{"darkseagreen1", "#C1FFC1", 0},{"darkseagreen2", "#B4EEB4", 0},{"darkseagreen3", "#9BCD9B", 0},{"darkseagreen4", "#698B69", 0},{"darkslateblue", "#483D8B", 0},{"darkslategray", "#2F4F4F", 0},{"darkslategray1", "#97FFFF", 0},{"darkslategray2", "#8DEEEE", 0},{"darkslategray3", "#79CDCD", 0},{"darkslategray4", "#528B8B", 0},{"darkslategrey", "#2F4F4F", 0},{"darkturquoise", "#00CED1", 0},{"darkviolet", "#9400D3", 0},{"deeppink", "#FF1493", 0},{"deeppink1", "#FF1493", 0},{"deeppink2", "#EE1289", 0},{"deeppink3", "#CD1076", 0},{"deeppink4", "#8B0A50", 0},{"deepskyblue", "#00BFFF", 0},{"deepskyblue1", "#00BFFF", 0},{"deepskyblue2", "#00B2EE", 0},{"deepskyblue3", "#009ACD", 0},{"deepskyblue4", "#00688B", 0},{"dimgray", "#696969", 0},{"dimgrey", "#696969", 0},{"dodgerblue", "#1E90FF", 0},{"dodgerblue1", "#1E90FF", 0},{"dodgerblue2", "#1C86EE", 0},{"dodgerblue3", "#1874CD", 0},{"dodgerblue4", "#104E8B", 0},{"firebrick", "#B22222", 0},{"firebrick1", "#FF3030", 0},{"firebrick2", "#EE2C2C", 0},{"firebrick3", "#CD2626", 0},{"firebrick4", "#8B1A1A", 0},{"floralwhite", "#FFFAF0", 0},{"forestgreen", "#228B22", 0},{"gainsboro", "#DCDCDC", 0},{"ghostwhite", "#F8F8FF", 0},{"gold", "#FFD700", 0},{"gold1", "#FFD700", 0},{"gold2", "#EEC900", 0},{"gold3", "#CDAD00", 0},{"gold4", "#8B7500", 0},{"goldenrod", "#DAA520", 0},{"goldenrod1", "#FFC125", 0},{"goldenrod2", "#EEB422", 0},{"goldenrod3", "#CD9B1D", 0},{"goldenrod4", "#8B6914", 0},{"gray", "#BEBEBE", 0},{"gray0", "#000000", 0},{"gray1", "#030303", 0},{"gray2", "#050505", 0},{"gray3", "#080808", 0},{"gray4", "#0A0A0A", 0},{"gray5", "#0D0D0D", 0},{"gray6", "#0F0F0F", 0},{"gray7", "#121212", 0},{"gray8", "#141414", 0},{"gray9", "#171717", 0},{"gray10", "#1A1A1A", 0},{"gray11", "#1C1C1C", 0},{"gray12", "#1F1F1F", 0},{"gray13", "#212121", 0},{"gray14", "#242424", 0},{"gray15", "#262626", 0},{"gray16", "#292929", 0},{"gray17", "#2B2B2B", 0},{"gray18", "#2E2E2E", 0},{"gray19", "#303030", 0},{"gray20", "#333333", 0},{"gray21", "#363636", 0},{"gray22", "#383838", 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"#EEEE00", 0},{"yellow3", "#CDCD00", 0},{"yellow4", "#8B8B00", 0},{"yellowgreen", "#9ACD32", 0},{NULL, NULL, 0}};static void setpalette(const char **palette){int i;for (i = 0; (i < COLOR_TABLE_SIZE) && palette[i]; i++)R_ColorTable[i] = name2col(palette[i]);R_ColorTableSize = i;}SEXP attribute_hidden do_palette(SEXP call, SEXP op, SEXP args, SEXP rho){SEXP val, ans;unsigned int color[COLOR_TABLE_SIZE];int i, n;checkArity(op,args);/* Record the current palette */PROTECT(ans = allocVector(STRSXP, R_ColorTableSize));for (i = 0; i < R_ColorTableSize; i++)SET_STRING_ELT(ans, i, mkChar(col2name(R_ColorTable[i])));val = CAR(args);if (!isString(val)) error(_("invalid argument type"));if ((n=length(val)) == 1) {if (StrMatch("default", CHAR(STRING_ELT(val, 0)))) /* ASCII */setpalette(DefaultPalette);else error(_("unknown palette (need >= 2 colors)"));}else if (n > 1) {if (n > COLOR_TABLE_SIZE)error(_("maximum number of colors exceeded"));for (i = 0; i < n; i++)color[i] = char2col(CHAR(STRING_ELT(val, i)));for (i = 0; i < n; i++)R_ColorTable[i] = color[i];R_ColorTableSize = n;}UNPROTECT(1);return ans;}SEXP attribute_hidden do_colors(SEXP call, SEXP op, SEXP args, SEXP rho){SEXP ans;int n;for (n = 0; ColorDataBase[n].name != NULL; n++) ;PROTECT(ans = allocVector(STRSXP, n));for (n = 0; ColorDataBase[n].name != NULL; n++)SET_STRING_ELT(ans, n, mkChar(ColorDataBase[n].name));UNPROTECT(1);return ans;}/* Hex Digit to Integer Conversion */static unsigned int hexdigit(int digit){if('0' <= digit && digit <= '9') return digit - '0';if('A' <= digit && digit <= 'F') return 10 + digit - 'A';if('a' <= digit && digit <= 'f') return 10 + digit - 'a';/*else */ error(_("invalid hex digit in 'color' or 'lty'"));return digit; /* never occurs (-Wall) */}/* #RRGGBB[AA] String to Internal Color Code */static unsigned int rgb2col(const char *rgb){unsigned int r=0, g=0, b=0, a=0; /* -Wall */if(rgb[0] != '#')error(_("invalid RGB specification"));switch (strlen(rgb)) {case 9:a = 16 * hexdigit(rgb[7]) + hexdigit(rgb[8]);case 7:r = 16 * hexdigit(rgb[1]) + hexdigit(rgb[2]);g = 16 * hexdigit(rgb[3]) + hexdigit(rgb[4]);b = 16 * hexdigit(rgb[5]) + hexdigit(rgb[6]);break;default:error(_("invalid RGB specification"));}if (strlen(rgb) == 7)return R_RGB(r, g, b);elsereturn R_RGBA(r, g, b, a);}/* External Color Name to Internal Color Code */unsigned int attribute_hidden name2col(const char *nm){int i;if(strcmp(nm, "NA") == 0 || strcmp(nm, "transparent") == 0)/** Paul 01/07/04 (2004-07-01?)** Used to be set to NA_INTEGER.** Now set to fully transparent white.** In some cases, fully transparent gets caught by* the graphics engine and no drawing occurs, but* in other cases, transparent colours are passed to devices.** All devices should respond to fully transparent by* not drawing.*/return R_TRANWHITE;for(i = 0; ColorDataBase[i].name ; i++) {if(StrMatch(ColorDataBase[i].name, nm))return ColorDataBase[i].code;}error(_("invalid color name '%s'"), nm);return 0; /* never occurs but avoid compiler warnings */}static double number2col(const char *nm, double bg){int indx;char *ptr;indx = strtod(nm, &ptr);if(*ptr) error(_("invalid color specification '%s'"), nm);if(indx == 0) return bg;else return R_ColorTable[(indx-1) % R_ColorTableSize];}static char ColBuf[10];staticchar *RGB2rgb(unsigned int r, unsigned int g, unsigned int b){ColBuf[0] = '#';ColBuf[1] = HexDigits[(r >> 4) & 15];ColBuf[2] = HexDigits[r & 15];ColBuf[3] = HexDigits[(g >> 4) & 15];ColBuf[4] = HexDigits[g & 15];ColBuf[5] = HexDigits[(b >> 4) & 15];ColBuf[6] = HexDigits[b & 15];ColBuf[7] = '\0';return &ColBuf[0];}staticchar *RGBA2rgb(unsigned int r, unsigned int g, unsigned int b, unsigned int a){ColBuf[0] = '#';ColBuf[1] = HexDigits[(r >> 4) & 15];ColBuf[2] = HexDigits[r & 15];ColBuf[3] = HexDigits[(g >> 4) & 15];ColBuf[4] = HexDigits[g & 15];ColBuf[5] = HexDigits[(b >> 4) & 15];ColBuf[6] = HexDigits[b & 15];ColBuf[7] = HexDigits[(a >> 4) & 15];ColBuf[8] = HexDigits[a & 15];ColBuf[9] = '\0';return &ColBuf[0];}/* Internal to External Color Representation *//* Search the color name database first *//* If this fails, create an #RRGGBB string *//* used in grid */const char *col2name(unsigned int col){int i;if(R_OPAQUE(col)) {for(i=0 ; ColorDataBase[i].name ; i++) {if(col == ColorDataBase[i].code)return ColorDataBase[i].name;}ColBuf[0] = '#';ColBuf[1] = HexDigits[(col >> 4) & 15];ColBuf[2] = HexDigits[(col ) & 15];ColBuf[3] = HexDigits[(col >> 12) & 15];ColBuf[4] = HexDigits[(col >> 8) & 15];ColBuf[5] = HexDigits[(col >> 20) & 15];ColBuf[6] = HexDigits[(col >> 16) & 15];ColBuf[7] = '\0';return &ColBuf[0];} else if (R_TRANSPARENT(col)) {return "transparent";} else {ColBuf[0] = '#';ColBuf[1] = HexDigits[(col >> 4) & 15];ColBuf[2] = HexDigits[(col ) & 15];ColBuf[3] = HexDigits[(col >> 12) & 15];ColBuf[4] = HexDigits[(col >> 8) & 15];ColBuf[5] = HexDigits[(col >> 20) & 15];ColBuf[6] = HexDigits[(col >> 16) & 15];ColBuf[7] = HexDigits[(col >> 28) & 15];ColBuf[8] = HexDigits[(col >> 24) & 15];ColBuf[9] = '\0';return &ColBuf[0];}}static double str2col(const char *s, double bg){if(s[0] == '#') return rgb2col(s);/* This seems rather strange,and made this depend on base graphics.Looks like it was an artefact of conversion in col2rgb().*/else if(isdigit((int)s[0])) return number2col(s, bg);else return name2col(s);}/* used in grDevices, public */unsigned int R_GE_str2col(const char *s){return (unsigned int)str2col(s, R_TRANWHITE);}/* Convert a sexp element to an R color desc *//* We Assume that Checks Have Been Done *//* used in grid/src/gpar.c */unsigned int RGBpar3(SEXP x, int i, unsigned int bg){int indx;switch(TYPEOF(x)){case STRSXP:return (unsigned int)str2col(CHAR(STRING_ELT(x, i)), bg);case LGLSXP:indx = LOGICAL(x)[i];if (indx == NA_LOGICAL) return R_TRANWHITE;break;case INTSXP:indx = INTEGER(x)[i];if (indx == NA_INTEGER) return R_TRANWHITE;break;case REALSXP:if(!R_FINITE(REAL(x)[i])) return R_TRANWHITE;indx = REAL(x)[i];break;default:warning(_("supplied color is not numeric nor character"));return bg;}if (indx <= 0) return bg;else return R_ColorTable[(indx-1) % R_ColorTableSize];}unsigned int RGBpar(SEXP x, int i){return RGBpar3(x, i, R_TRANWHITE);}/** Is element i of a colour object NA (or NULL)?*/Rboolean attribute_hidden isNAcol(SEXP col, int index, int ncol){Rboolean result = TRUE; /* -Wall */if (isNull(col))result = TRUE;else {if (isLogical(col))result = LOGICAL(col)[index % ncol] == NA_LOGICAL;else if (isString(col))result = strcmp(CHAR(STRING_ELT(col, index % ncol)), "NA") == 0;else if (isInteger(col))result = INTEGER(col)[index % ncol] == NA_INTEGER;else if (isReal(col))result = !R_FINITE(REAL(col)[index % ncol]);elseerror(_("Invalid color specification"));}return result;}/* Initialize the Color Databases */void attribute_hidden InitColors(void){int i;/* Initialize the Color Database */for(i = 0 ; ColorDataBase[i].name ; i++)ColorDataBase[i].code = rgb2col(ColorDataBase[i].rgb);ColorDataBaseSize = i;/* Install Default Palette */for(i = 0 ; DefaultPalette[i] ; i++)R_ColorTable[i] = name2col(DefaultPalette[i]);R_ColorTableSize = i;}